菊地 優 (キクチ マサル)

工学研究院 建築都市部門 先端空間性能教授
Last Updated :2024/12/06

■研究者基本情報

学位

  • 博士(工学), 北海道大学

Researchmap個人ページ

研究者番号

  • 50344479

研究キーワード

  • 建築構造学

研究分野

  • 社会基盤(土木・建築・防災), 建築構造、材料

■経歴

経歴

  • 2007年 - 2009年
    北海道大学准教授(工学研究科建築都市空間デザイン専攻) 准教授
  • 2009年
    - 北海道大学教授(工学研究院建築都市空間デザイン部門) 教授
  • 2009年
    - Professor
  • 2002年 - 2005年
    北海道大学助教授(工学研究科社会基盤工学専攻) 助教授
  • 2002年 - 2005年
    Associate Professor
  • 1986年 - 2002年
    清水建設株式会社 職員(技術系)
  • 1986年 - 2002年
    Technical Staff,Shimizu Corporation

学歴

  • 1984年04月 - 1986年03月, 北海道大学, 大学院, 工学研究科修士課程
  • 1980年04月 - 1984年03月, 北海道大学, 工学部, 建築工学科

委員歴

  • 2021年08月 - 現在
    日本建築総合試験所, 建築構造・材料性能評価委員会・委員, その他
  • 2021年04月 - 現在
    北海道地区自然災害科学資料センター, センター長, 学協会
  • 2021年04月 - 現在
    日本建築学会, 構造委員会・委員, 学協会
  • 2021年04月 - 現在
    日本建築学会, 振動運営委員会・主査, 学協会
  • 2020年11月 - 現在
    日本学術会議, 連携会員, 政府
  • 2020年07月 - 現在
    日本免震構造協会, 理事, 学協会
  • 2018年06月 - 現在
    北海道, 建築局総合評価検討会・委員, 自治体
  • 2017年07月 - 現在
    日本免震構造協会, 次世代免震システム検討委員会・委員長, 学協会
  • 2016年03月 - 現在
    日本建築センター, 超高層・免震等建築物構造審査委員会・委員, その他
  • 2015年08月 - 現在
    北海道, 北海道建築審査会・委員, 自治体
  • 2015年05月 - 現在
    日本免震構造協会, 免震支承問対策委員会・委員長, 学協会
  • 2013年04月 - 現在
    北海道開発局, 営繕部総合評価審査委員会・委員, 政府
  • 2011年 - 現在
    日本免震構造協会, 原子力関係施設免震構造委員会, 学協会
  • 2009年 - 現在
    北海道建築指導センター, 耐震改修計画評定審査委員会, その他
  • 2020年06月 - 2022年05月
    日本建築学会, 北海道支部長, 学協会
  • 2017年04月 - 2021年03月
    日本建築学会, 振動運営委員会・幹事, 学協会
  • 2013年04月 - 2017年03月
    日本建築学会, 免震構造小委員会・主査, 学協会
  • 2009年 - 2017年03月
    日本建築学会, 振動運営委員会委員, 学協会
  • 2014年09月 - 2015年03月
    北海道, 赤れんが庁舎修復等方針検討委員会・委員, 自治体
  • 2011年09月 - 2014年03月
    日本建築学会, 巨大災害からの回復力が強いまちづくり特別調査委員会幹事, 学協会
  • 2009年04月 - 2013年03月
    日本建築学会, 免震構造小委員会委員, 学協会
  • 2002年 - 2013年
    日本建築学会北海道支部, 構造専門委員会, 学協会
  • 2012年 - 2012年
    北海道, 北海道庁本庁舎耐震改修事業審査委員会, 自治体
  • 2008年 - 2012年
    日本建築学会北海道支部, 総務委員会委員長, 学協会
  • 2009年 - 2011年
    日本建築学会, 技術報告集編集委員会, 学協会
  • 2006年 - 2008年
    日本建築学会, 卒業論文等顕彰事業委員会, 学協会
  • 2004年 - 2006年
    日本建築学会, 東海地震等への対応特別調査研究委員会免震建物WG幹事, 学協会
  • 2003年 - 2005年
    日本建築学会北海道支部, 常議員幹事, 学協会

■研究活動情報

受賞

  • 2020年, 日本免震構造協会, 日本免震構造協会賞(技術賞)               
    巨大地震に対するフェイルセーフ機構を有するアイソレータ「QTB」の開発
    濱口弘樹;山本俊司;和氣知貴;石井建;菊地優
  • 2019年10月, 大成学術財団選奨, 金賞(論文)               
    高摩擦すべり支承の熱・力学連成挙動解析システムの開
    菊地優
  • 2015年, 日本建築学会, 日本建築学会賞(論文)               
    免震構造物の地震応答評価法に関する一連の研究
    菊地 優
  • 2010年, 日本機械学会動力エネルギーシステム部門貢献表彰               
    日本国
  • 2005年, 日本免震構造協会, 日本免震構造協会賞(技術賞)               
    履歴減衰型免震部材の統一的復元力モデルの開発
    菊地優;山本祥江;北村佳久;猿田正明;田村和夫, 日本国

論文

  • VIBRATION CHARACTERISTICS OF DISPLACEMENT CONTROL SYSTEM COMBINING QUASI-ZERO STIFFNESS AND INERTER
    Jun IBA, Koichi WATANABE, Kou MIYAMOTO, Ken ISHII, Masaru KIKUCHI
    Journal of Structural and Construction Engineering (Transactions of AIJ), 89, 821, 708, 718, Architectural Institute of Japan, 2024年07月01日
    研究論文(学術雑誌)
  • PARETO FRONT OF DEMAND SPECTRA NORMALIZED BY GROUND MOTION FOR SINUSOIDAL RESPONSES OF SDOF SYSTEMS
    Ken ISHII, Masaru KIKUCHI
    Journal of Structural and Construction Engineering (Transactions of AIJ), 89, 816, 140, 147, Architectural Institute of Japan, 2024年02月01日
    研究論文(学術雑誌)
  • LOADING TEST AND ANALYSIS METHOD FOR COMBINED EVALUATION OF VELOCITY AND TEMPERATURE DEPENDENCIES ON MECHANICAL PROPERTIES OF SLIDING BEARINGS
    Ken ISHII, Masaru KIKUCHI, Yuta IRISAWA, Tomotaka WAKE
    Journal of Structural and Construction Engineering (Transactions of AIJ), 88, 814, 1646, 1654, Architectural Institute of Japan, 2023年12月01日
    研究論文(学術雑誌)
  • Development of Nonlinear Geometric Seismic Isolation with a Duffing Spring
    Kou Miyamoto, Jun Iba, Koichi Watanabe, Ken Ishii, Masaru Kikuchi
    Structural Control and Health Monitoring, 2023, 1, 24, Hindawi Limited, 2023年03月23日
    研究論文(学術雑誌), Seismic isolation is widely used in several countries, and the number of seismically isolated buildings has increased rapidly in recent decades. Seismic isolation extends the natural period of a building to decrease the absolute acceleration and seismic force. As there is a trade-off between the absolute acceleration and displacement, a soft layer results in a large displacement for a large seismic wave, but the hard one causes the large absolute acceleration even for a small seismic wave. The restoring force of a Duffing spring is given by the third and first orders of the displacement. This spring has been applied to protect a building from large earthquake waves. However, the influence of the coefficient of the Duffing spring that determines the dynamic characteristics of the system has not been clarified. Thus, a used Duffing spring may not be appropriate for seismic resistance. Moreover, most studies are based on analytical methods, and the advantages of the Duffing isolation have not been verified in an actual system. To address these problems, this paper reveals the influence of the coefficient of the Duffing spring on structural responses to seismic waves. Moreover, this paper devised a way to implement a Duffing spring for seismic isolation and carried out experiments to verify the validity in actual systems. The experimental results presented that the Duffing spring was effective in protecting a building in actual systems.
  • DISPLACEMENT CONTROL SYSTEM FOR SEISMIC ISOLATION ON FULL-SCALE DISPLACEMENT EQUIPPED WITH HSLDS AND ROTATIONAL INERTIA
    Jun IBA, Koichi WATANABE, Kou MIYAMOTO, Ken ISHII, Masaru KIKUCHI
    Journal of Structural and Construction Engineering (Transactions of AIJ), 88, 805, 426, 436, Architectural Institute of Japan, 2023年03月01日
    研究論文(学術雑誌)
  • 硬化型復元力と回転慣性質量を組み合わせた実大変位スケールの変位抑制型免震構造に関する研究               
    射場 淳, 渡辺 宏一, 宮本 皓, 石井 建, 菊地 優
    日本建築学会構造系論文集, 88, 805, 426, 436, 2023年03月, [査読有り]
    日本語, 研究論文(学術雑誌)
  • 鉛入り積層ゴムの熱・力学的連成挙動を考慮した免震建物の地震時応答評価に関する研究               
    近藤 明洋, 菊地 優
    日本建築学会構造系論文集, 88, 804, 211, 222, 2023年03月, [査読有り]
    日本語, 研究論文(学術雑誌)
  • THERMAL-MECHANICAL COUPLED BEHAVIOR OF TIN RUBBER SEISMIC ISOLATION BEARINGS
    Masayuki YANAGI, Miyuki SHIMIZU, Hidenori KIDA, Hiroki NAGAI, Ken ISHII, Masaru KIKUCHI
    Journal of Structural and Construction Engineering (Transactions of AIJ), 87, 802, 1142, 1151, Architectural Institute of Japan, 2022年12月01日
    研究論文(学術雑誌)
  • 錫プラグ入り免震積層ゴムの熱・力学連成挙動に関する研究               
    柳勝幸, 清水美雪, 木田英範, 長井大樹, 石井建, 菊地優
    日本建築学会構造系論文集, 87, 802, 1142, 1151, 2022年12月, [査読有り]
    日本語, 研究論文(学術雑誌)
  • Seismic response control effects for reinforced-concrete buildings incorporating a passive variable friction device
    Kazutaka SHIRAI, Tomoaki ITO, Masaru KIKUCHI
    Journal of Building Engineering, 62, 105388, 2022年12月, [査読有り], [国際誌]
    英語, 研究論文(学術雑誌)
  • A seismic mass damper system using scrap tire pads: Loading tests on mechanical properties and numerical assessment of the response control effects
    Jihyun PARK, Kazutaka SHIRAI, Masaru KIKUCHI
    Soil Dynamics and Earthquake Engineering, 157, 107257, 2022年06月, [査読有り], [国際誌]
    英語, 研究論文(学術雑誌)
  • 大振幅地震動に対するオイルダンパーの繰り返し依存性を考慮した時刻歴応答解析に関する研究               
    荻野伸行, 石井建, 菊地優, 岡本真成, 中原学
    構造工学論文集, 68B, 376, 385, 2022年03月, [査読有り]
    日本語, 研究論文(学術雑誌)
  • TIME HISTORY RESPONSE ANALYSIS CONSIDERING REPEATED DEFORMATION DEPENDENCE OF THE OIL DAMPER UNDER EXTREMELY STRONG EARTHQUAKE GROUND MOTIONS
    Nobuyuki OGINO, Ken ISHII, Masaru KIKUCHI, Masanari OKAMOTO
    Journal of Structural Engineering B, 68B, 376, 385, Architectural Institute of Japan, 2022年
    研究論文(学術雑誌)
  • Scale Effect on Mechanical Behavior of Lead Rubber Bearings for Seismic Isolation
    Masaru Kikuchi, Mineo Takayama
    17th World Conference on Earthquake Engineering, 2021年09月
    英語, 研究論文(国際会議プロシーディングス), 13485088
  • Evaluation of effective seismic energy input rates based on long-term earthquake observation recoreds               
    Ken Ishii, Masaru Kikuchi, Masanori Iiba, Toshihide Kashima
    17th World Conference on Earthquake Engineering, 2021年09月
    英語, 研究論文(国際会議プロシーディングス)
  • An Analytical Model for Tin Rubber Bearings Under Large Shear Deformations
    Masayuki Yanagi, Miyuki Shimizu, Yuto Kobashi, Akira Yasunaga, Masaru Kikuchi
    17th World Conference on Earthquake Engineering, 2021年09月
    英語, 研究論文(国際会議プロシーディングス), 13485088
  • Thermal-Mechanical Coupled Analysis Model for Matrix Sliding Bearings
    Masaru Kikuchi, Ken Ishii, Takahisa Mori, Ryotaro Kurosawa, Hiroshi Sugiyama, Takahiro Koizumi
    17th World Conference on Earthquake Engineering, 2021年09月, [筆頭著者]
    英語, 研究論文(国際会議プロシーディングス), 13485088
  • 大振幅地震動に対する免震用多段速度依存型可変減衰オイルダンパーに関する研究
    荻野伸行, 菊地優, 岡本真成, 中原学
    構造工学論文集, 67B, 549, 556, 2021年03月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), 13485088
  • 硬化型復元力と回転慣性質量を組み合わせた変位抑制型免震構造に関する基礎的研究
    射場淳, 渡辺宏一, 石井建, 菊地優
    構造工学論文集, 67B, 539, 548, 2021年03月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), 13485088
  • 錫プラグ入り免震積層ゴムの大変形復元力モデルに関する研究
    柳勝幸, 清水美雪, 齊木健司, 安永亮, 菊地優
    構造工学論文集, 67B, 519, 529, 2021年03月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), 13485088
  • 鉛プラグ入り積層ゴム支承の減衰材分散配置による熱力学特性の改善効果
    和氣知貴, 菊地優, 石井建
    日本建築学会構造系論文集, 84, 763, 1187, 1197, 2019年09月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), 11047912
  • A Seismic Isolation System with High Safety Margin in Earthquakes Exceeding Design Level
    Hiroki Hamaguchi, Shunji Yamamoto, Wake Tomotaka, Masaru Kikuchi
    16th World Conference on Seismic Isolation, Energy Dissipation and Regulation of Dynamic Characteristics of Structures, Saint-Petersburg, Russia, 2019年07月, [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 11047912
  • High-performance Oil Dampers for Seismically Isolated Structures to Counter Extremely Strong Earthquake Ground Motions
    Nobuyuki Ogino, Masaru Kikuchi, Masanari Okamoto
    16th World Conference on Seismic Isolation, Energy Dissipation and Regulation of Dynamic Characteristics of Structures, Saint-Petersburg, Russia, 2019年07月, [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 11047912
  • New Evaluation Formulae for Shear Strength of Lead-Rubber Bearings
    Wake Tomotaka, Masaru Kikuchi, Ken Ishii
    16th World Conference on Seismic Isolation, Energy Dissipation and Regulation of Dynamic Characteristics of Structures, Saint-Petersburg, Russia, 2019年07月, [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 11047912
  • An Analytical Model for Low-shear Modulus High-damping Rubber Isolation Bearings under Large Shear Deformation
    Masaru Kikuchi, Ken Ishii, Hideaki Kato, Masahiro Nakamura
    16th World Conference on Seismic Isolation, Energy Dissipation and Regulation of Dynamic Characteristics of Structures, Saint-Petersburg, Russia, 2019年07月, [筆頭著者], [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 11047912
  • Mechanical behavior of sliding bearings for seismic isolation under cyclic loading
    Ken Ishii, Masaru Kikuchi
    16th World Conference on Seismic Isolation, Energy Dissipation and Regulation of Dynamic Characteristics of Structures, Saint-Petersburg, Russia, 2019年07月, [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 11047912
  • Practical application of lead rubber bearings with fail-safe mechanism
    Hiroki Hamaguchi, Tomotaka, Wake, Masashi Yamamoto, Masaru Kikuchi
    Japan Artchitectural Review, 2, 3, 323, 339, 2019年07月, [査読有り], [国際誌]
    英語, 研究論文(学術雑誌), 11047912
  • An Advanced Hysteresis Model of High-Damping Rubber Bearings for Seismic Isolation
    Masaru Kikuchi, Ken Ishii
    Proceedings of the 7th Structural Engineers World Congress 2019, Istanbul, Turkey, 2019年04月, [筆頭著者], [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 11047912
  • Effective Seismic Input Rates for Exsiting Buildings Considering Soil-Structure Interaction               
    Ken Ishii, Masaru Kikuchi, Jun Yoshida
    Proceedings of the 7th Structural Engineers World Congress 2019, Istanbul, Turkey, 2019年04月, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • Improved thermo-dynamic behavior of lead-rubber isolation bearings due to distributed lead-core configurations
    Tomotaka Wake, Ken Ishii, Masaru Kikuchi
    Journal of Structural and Construction Engineering, 84, 763, 1187, 1197, Architectural Institute of Japan, 2019年
    英語, 研究論文(学術雑誌), To clarify the effectiveness of the distributed lead-core configurations of LRB, real-scale dynamic loading experiments and heat-mechanics interaction analysis were carried out. Experiments and analyses revealed that the energy absorption performance tends to decline as the diameter of the lead core becomes larger, and that the multi-core LRB effectively restrains such decline in performance. In order to analyze a multi-core LRB, it is necessary to use a three-dimensional model, but this study reveals that analysis by CFS or FDM with a two-dimensional model is sufficiently accurate and is more conveniently.
  • Improved numerical analysis for ultimate behavior of elastomeric seismic isolation bearings
    Ken Ishii, Masaru Kikuchi
    Earthquake Engineering & Structural Dynamics, 48, 1, 65, 77, Wiley, 2019年01月, [査読有り], [国際誌]
    研究論文(学術雑誌), 11047912
  • A new evaluation method for yielding force of lead rubber bearings under cyclic loading
    Tomotaka Wake, Masaru Kikuchi, Ken Ishii, Yohei Kuroshima, Takahito Nakamura
    Journal of Structural and Construction Engineering, 83, 750, 1105, 1115, Architectural Institute of Japan, 2018年08月01日
    英語, 研究論文(学術雑誌), The purpose of this study is to clarify strength degradation in LRB in the event of a long-duration earthquake. Obtained from studying cyclic loading tests provide the following conclusions. [1] The strain, strain rate and temperature dependency of the intercept force obtained from rubber bearing (RB) tests were clarified, and equations were proposed. [2] By subtracting the RB intercept force from the yielding force of the LRB, the relationship between temperature and yielding stress of lead plug was obtained, and equations were proposed. [3] The proposed equations could successfully predict the mechanical behavior and the change of temperature of LRB.
  • Thermal-Mechanical Coupled Behavior of Sliding Bearings for Seismic Isolation
    Masaru Kikuchi, Ken Ishii
    1st International Conference on Numerical Modelling in Engineering, Ghent, Belgium, 2018年08月, [筆頭著者], [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 11819613
  • 繰り返し加力を受ける鉛プラグ入り積層ゴム支承の降伏荷重評価法に関する研究
    和氣知貴, 菊地優, 石井建, 黒嶋洋平, 仲村崇仁
    日本建築学会構造系論文集, 83, 750, 1105, 1115, 2018年08月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), 11047912
  • フェイルセーフ機構を備える鉛プラグ入り積層ゴム支承の実用化に関する実験的研究
    濱口弘樹, 和氣知貴, 山本雅史, 菊地優
    日本建築学会構造系論文集, 83, 749, 1009, 1019, 日本建築学会, 2018年07月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), The authors have been developing a new seismic isolation bearing, which consists of a lead rubber bearing (LRB) and a slider bearing as a fail-safe (FS) mechanism in series. The bearing called “FSLRB” behaves as a general LRB which is just friction connected to the building structure at either of upper or lower end, when subjected to design level earthquakes or smaller, while the sliding behavior keeps LRB away from giving excessive hardening and shear break in severe earthquakes beyond expectations. Hence, FSLRB has much higher seismic safety compared to general isolation bearings including conventional LRBs. In this paper, dynamic and quasi-static horizontal loading tests under constant or varying compressive loadings for several kinds of scaled and full-scale FSLRB specimens are conducted, to evaluate the effect of bi-directional excitations on additional torsion in the LRB part and changes in friction properties in the slider part. Ultimate performance limit of a full-scale bearing is also investigated under extremely high surface pressures beyond expectations.
     Dynamic loading tests of two types of □-200mm scaled specimens, each has different second shape factor in the LRB part, make clear that there is no apparent difference in friction properties between uni-directional and bi-directional excitations, and no damage to the LRB part due to the torsional behavior in bi-directional excitation, as far as the bearing is applied under a reasonable surface pressure around 10 N/mm2. Bi-directional dynamic loading tests of a □-900mm full-scale specimen show that there is no significant scale-effect between the full-scale FSLRB and the □-200mm scaled one on both the torsional behavior of the LRB part and friction properties of the slider part. Uni-directional dynamic loading tests of □-600mm full-scale specimens indicate that dynamic and static friction coefficients have quite low velocity dependence in reasonable sliding speed expected in the practical use. Finally, uni-directional quasi-static loading tests of □-600mm specimens show that the bearing should be applied under surface pressure of 20 N/mm2 or lower, to give a well-ordered tri-linear hysteresis curve without causing any unexpected incidents such as partial uplift of the slider part and buckling or shear break of the LRB part.
     Furthermore, surface pressure dependence of dynamic and static friction coefficients are inductively estimated applying all the data obtained in the series of the research, including the test results of □-60mm scaled slider, □-414mm scaled FSLRB and □-900mm full-scale FSLRB introduced in the authors’ preceding paper. The data indicate that both dynamic and static friction coefficients are highly affected by the dimensions of each FSLRB, those are the second shape factor of the LRB part and out-of-plane stiffness of the steel plates between the LRB part and the slider part. By introducing “effective surface pressure” reflecting the effect of the above two dimensions, friction coefficients can be even accurately estimated compared to a conventional method only using mean surface pressure.
     As a conclusion through the series of the loading tests and the considerations mentioned above, the authors think that FSLRB is ready for the practical use in a seismic isolation system with even higher safety margin compared to conventional systems., 11047912
  • Thermal-Mechanical Coupled Behavior of Elastomeric Isolation Bearings Under Cyclic Loading
    Masaru Kikuchi, Ken Ishii
    16th European Conference on Earthquake Engineering, Thessaloniki, Greece, 2018年06月, [筆頭著者], [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 11047912
  • 鉛の繰り返し載荷による熱・力学連成挙動評価に関する研究               
    西村拓也, 熊谷仁志, 菊地優
    構造工学論文集, 64B, 333, 344, 2018年03月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌)
  • Structural characteristics and vibration behaviors on the main hall of Ohtaniha Hakodate Betsuin (1915)
    Kazutaka Shirai, Masaru Kikuchi, Ken Ishii, Sadamasa Komaki
    AIJ Journal of Technology and Design, 24, 56, 201, 206, Architectural Institute of Japan, 2018年02月01日, [査読有り], [国際誌]
    日本語, 研究論文(学術雑誌), The main hall of Ohtaniha Hakodatuin, which was completed in 1915, is the oldest temple architecture using reinforced concrete structure in Japan. The temple has been designated as an Important Cultural Property of Japan in 2007. In this paper, structural characteristics of the temple based on previous studies were described. Furthermore, evaluation of vibration behavior of the temple by micro-tremor observation and eigenvalue analysis using numerical 3-D frame models were presented. From the results, natural frequencies of the analytical model with decreased concrete Young's modulus considering aging and construction situation showed a good agreement with the micro-tremor observation results.
  • Earthquake Response Analysis of the Historic Reinforced Concrete Temple Otaniha Hakodate Bestuin after Seismic Refrofitting with Friction Dampers
    Kazutaka Shirai, Masaru Kikuchi, Tomoaki Ito, Ken Ishii
    International Journal of Architectural Heritage, 2018年, [査読有り], [国際誌]
    英語, 研究論文(学術雑誌)
  • 設計想定を超える地震動に対して高い耐震安全性を有する免震構造の提案
    濱口弘樹, 和氣知貴, 山本雅史, 菊地優
    日本建築学会構造系論文集, 82, 739, 1349, 1359, Architectural Institute of Japan, 2017年09月01日, [査読有り], [国内誌]
    英語, 研究論文(学術雑誌), Seismically isolated (SI) buildings are thought to be fragile when subjected to excessive input ground motions beyond design level. The authors have been proposing a new isolation bearing which has much higher seismic safety than conventional bearings. Supporting a superstructure only by the proposed bearings will enable the whole SI building to protect from any structural damage. In this paper, the development process of the proposed bearing including the selection of the most suitable slider material, dynamic loading test of a scaled bearing and quasi-static loading test of a full-scale bearing is mentioned. Preliminary and detailed time history analyses of SI building models are also shown. The research results lead to the conclusion that a system applying the proposed bearings realizes an SI building with higher seismic safety than ever, if only provided a large enough isolation gap., 11047912
  • Coupling behavior of shear deformation and end rotation of elastomeric seismic isolation bearings
    Ken Ishii, Masaru Kikuchi, Takuya Nishimura, Cameron J. Black
    EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, 46, 4, 677, 694, WILEY, 2017年04月, [査読有り], [国際共著], [国際誌]
    英語, 研究論文(学術雑誌), This paper presents a mechanical model for predicting the behavior of elastomeric seismic isolation bearings subject to combined end rotations and shear deformation. The mechanical model consists of a series of axial springs at the top, mid-height and bottom of the bearing to vertically reproduce asymmetric bending moment distribution in the bearings. The model can take into account end rotations of the bearing, and the overall rotational stiffness includes the effect of the variation of vertical load on the bearing and the imposed shear deformation. Static bending tests under various combinations of vertical load and shear deformation were performed to identify the mechanical characteristics of bearings. The test results indicate that bearing rotational stiffness increases with increasing vertical load but decreases with increasing shear deformation. Simulation analyses were conducted to validate the new mechanical model. The results of analyses using the new model show very good agreement with experimental observations. A series of seismic response analyses were performed to demonstrate the dynamic behavior of top-of-column isolated structures, a configuration where the end rotations of isolation bearings are typically expected to be larger. The results suggest that the end rotations of elastomeric bearings used in practical top-of-column isolated structures do not reduce the stability limit of isolation system. Copyright (c) 2016 John Wiley & Sons, Ltd., 11047912
  • 過大変位抑制機構付き可変摩擦ダンパーによる鋼構造超高層建築の地震応答制御効果に関する解析的研究               
    白井和貴, 李イ科, 石井歩, 菊地優
    構造工学論文集, 63B, 153, 160, 2017年03月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌)
  • 鉛プラグ入り積層ゴムの熱・力学的連成挙動を考慮した免震建物の地震応答解析
    黒嶋洋平, 石井建, 菊地優, 飯場正紀, 白井和貴
    構造工学論文集, 63B, 231, 239, 2017年03月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), 11047912
  • 設計想定を超える地震動に対して高い耐震安全性を有する免震構造の提案
    濱口 弘樹, 和氣 知貴, 山本 雅史, 菊地 優
    日本建築学会構造系論文集, 82, 739, 1349, 1359, 日本建築学会, 2017年
    英語, 研究論文(国際会議プロシーディングス), Since seismically isolated (SI) buildings are thought to be fragile when subjected to extreme input ground motions beyond design level, various measures such as shock absorbers on moat walls and stoppers put in isolation level have been developed. Those technologies should be helpful to increase seismic safety margin of SI buildings, while they cannot avoid the damage to moat walls, superstructure, or isolation devices. In this paper, the authors propose a new lead rubber bearing (LRB) which has much higher seismic safety compared to general isolation bearings including conventional LRBs.
     The proposed bearing named “FSLRB” or “Fail-Safe LRB” consists of a conventional LRB and a newly developed slider system in series. Friction factor of the slider system is optimally provided to start sliding just before LRB gives a hardening property with the shear strain of around 250%. Then, the bearing behaves as a general LRB which is just friction connected to the building structure at either of upper or lower end, when subjected to design level earthquakes or smaller, while the sliding behavior keeps LRB away from hardening and shear break in severe earthquakes beyond expectations. Hence, supporting a superstructure only by the proposed bearings will enable the whole SI building to protect from any structural damage regardless of the input ground motion levels. A preliminary time history analysis for two SI building models, one applying only FSLRBs, the other applying only conventional LRBs, shows the advantages of the system with the proposed bearings.
     Realizing the above high seismic performance, firstly the most suitable slider material, which was a certain PTFE, was selected by conducting a series of dynamic loading test for each combination of stainless steel plate (SUS304) and 12 candidate slider materials. A dynamic loading test of a scaled FSLRB applying the selected PTFE showed that the bearing almost behaved as expected in the preliminary time history analysis. Dynamic and static friction factors were evaluated as well as surface pressure and velocity dependence of those two factors were formulated from the test results. Furthermore, a full-scale FSLRB was tested under a rather high compression force with quasi-static horizontal loading, to investigate the maximum allowable conditions regarding surface pressure and the second shape factor of LRB part. Finally, a detailed time history analysis of a FSLRB building model was conducted. As for the analysis model, 256 full-size FSLRBs with the mechanical properties evaluated in the above loading tests supported a deformed nuclear power plant consisted of a reactor building and a turbine building set on a common isolation raft. The analysis result showed that the superstructure remained elastic and the maximum responses were lower than design criteria even when subjected to a long-period ground motion beyond design level. On the other hand, it became clear that both the maximum deformation and residual deformation at isolation level were much larger than conventional LRB building model.
      From the above development and analyses, it can be finally concluded that an SI building applying the proposed bearings can realize much higher seismic safety compared to conventional SI buildings, if only provided a large enough isolation gap considering the maximum considered earthquakes., 11047912
  • Analytical Study on the Seismic Retrofitting of a Historical Reinforced Concrete Temple using Frcition Dampers               
    Kazutaka Shirai, Masaru Kikuchi, Tomoaki Ito, Ken Ishii
    Proceesing of the 3rd International Conference on Protection of Historical Constructions, Lisbon, Portugal, 2017年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • Seismic response analysis considering the thermal and mechanical coupling behavior of lead rubber bearings
    Ken Ishii, Masaru Kikuchi, Yohei Kuroshima
    EMI2017, 2017年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 11047912
  • Numerical model for low-shear modulus high-damping rubber isolation bearing under large shear deformation
    Masaru Kikuchi, Ken Ishii, Kato Hideaki, Masahiro Nakamura
    EMI2017, 2017年, [筆頭著者], [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 11047912
  • Strength Degradation on Lead-Rubber Bearings during a Long-duration Earthquake
    T. Wake, M. Kikuchi, K. Ishii
    2017 NZSEE Conference, 2017年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 11047912
  • Horizontal Biaxial Loading Tests on Sliding Lead Rubber Bearing System               
    M. Yamamoto, H. Hamaguchi, N. Kamoshita, M. Kikuchi, K. Ishii, T. Wake
    2017 NZSEE Conference, 2017年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • 可変摩擦ダンパーによる鋼構造超高層建築の地震時全体曲げ変形の制御効果に関する解析的研究
    白井和貴, 石井歩, 菊地優
    鋼構造論文集, 23, 90, 89, 104, 2016年06月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌)
  • Analytical Model for Elastoplastic and Creep-Like Behavior of High-Damping Rubber Bearings
    Hideaki Kato, Takahiro Mori, Nobuo Murota, Masaru Kikuchi
    JOURNAL OF STRUCTURAL ENGINEERING, 141, 9, 04014213-1, 04014213-9, ASCE-AMER SOC CIVIL ENGINEERS, 2015年09月, [査読有り], [国際誌]
    英語, 研究論文(学術雑誌), In the present study, a new analytical model of high-damping rubber bearings (HDRBs) for time-history analysis is proposed. The proposed model is used in the evaluation of elastoplastic and creep-like behavior of HDRBs under bidirectional seismic and strong wind loading. The analytical model was developed by reducing the degrees of freedom of a new type of constitutive law that was proposed by the authors for finite-element analysis of seismic isolation bearings. First, the validity of the proposed model for time-history response analysis was examined through various tests of HDRBs under unidirectional and bidirectional loading. The analytical results agreed well with the test results. Next, wind loading tests were conducted and the reproducibility of creep-like behavior of HDRBs under wind loading was evaluated. The effectiveness of the proposed model was verified by the tests, and the limitations of the applicability of the proposed model were determined. (C) 2014 American Society of Civil Engineers.
  • ねじれひずみを考慮した高減衰積層ゴムの水平2方向復元力特性
    菊地優, 鵜原正樹, 白井和貴, 山本雅史, 佐々木頼孝
    構造工学論文集, 61B, 471, 480, 2015年03月, [査読有り], [筆頭著者], [国内誌]
    日本語, 研究論文(学術雑誌), 10335731
  • Analytical model for lead-rubber bearings considering heat conduction               
    Ippei Tsunezawa, Masaru Kikuchi, Takahito Nakamura
    EMI2015, 2015年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • Performance and response analysis of a seismically isolated building during the 2011 Tohoku earthquake, Japan               
    Masaru Kikuchi, Toshihide Kashima, Kyo Fukuda
    EMI2015, 2015年, [筆頭著者], [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • 高減衰積層ゴムの3軸連成力学モデルに関する研究
    菊地優, 加藤秀章, 山本雅史, 石井建, 白井和貴
    日本建築学会構造系論文集, 80, 713, 1067, 1077, Architectural Institute of Japan, 2015年, [査読有り], [筆頭著者], [国内誌]
    英語, 研究論文(学術雑誌), A mechanical model for predicting the triaxial behavior of high-damping rubber bearings under bidirectional horizontal deformations and axial load is presented in this paper. This new model is developed by combining two existing models, both of which have been previously proposed by the authors. Tests of isolation bearings under bidirectional horizontal loading with different axial load levels were conducted. The experimental formulae for the bidirectional hysteresis model in the mechanical model were identified from the test results. The proposed model is shown to be capable of expressing the influence of the bidirectional deformations and axial load on the hysteresis loops., 10335731
  • 多数回繰返し加力による変動を考慮した免震用鉛ダンパーの復元力モデルに関する研究
    西村拓也, 中西啓二, 飯場正紀, 菊地優
    日本建築学会構造系論文集, 80, 711, 735, 743, Architectural Institute of Japan, 2015年, [査読有り], [国内誌]
    英語, 研究論文(学術雑誌), This paper presents an analytical hysteresis model of horizontal force-deformation relationship for lead dampers to evaluate the safety of seismic isolation system exposed to long-period earthquake motion. Dynamic loading tests with full-scale dampers were conducted. Yielding strength of damper declined with increase in accumulative deformation, however, it showed rise up temporarily when deformation amplitude was changed on sinusoidal horizontal loading. The analytical model can consider these features. Horizontal load of the test given response displacement motions at isolation layer obtained by a seismic time-history analysis using long-period earthquake motion was in good agreement with one calculated from the model.
  • 断面解析モデルを用いたアンボンドPCaPC梁部材の曲げ終局耐力点評価
    松茂良諒, 越川武晃, 菊地優
    日本建築学会構造系論文集, 79, 701, 1005, 1013, Architectural Institute of Japan, 2014年07月01日, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), This paper describes new evaluation formulas of ultimate strength and rotation angle for unbonded post-tensioned precast concrete beams. These formulas are composed by two main variables, one is a reinforcement index(q) and the other is an effective prestressing level (λpe). To evaluate coefficients of the evaluation formulas, we carried out a parametric study with a numerical section analysis model, and obtained regression formulas for the coefficients. By applying the evaluation formulas to the results of parametric study and experiments on the past, we elucidate that the formulas evaluate the ultimate strengths and rotation angles of them accurately.
  • Response Analysis of a Seismic Isolation Retrofit: The National Museum of Western Art Building in Tokyo, Japan               
    Masaru Kikuchi, Masaki Uhara, Toshihide Kashima, Kyo Fukuda
    Proceesing of the 2nd International Conference on Protection of Historical Constructions, Antalya, Turkey, 865, 870, 2014年05月, [筆頭著者], [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • 数種の面圧条件下における弾性すべり支承の水平二方向特性
    鴨下直登, 山本雅史, 嶺脇重雄, 菊地 優, 石井 建, 河内山修, 仲村崇仁
    日本建築学会構造系論文集, 79, 698, 453, 461, 2014年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), A series of bidirectional loading tests were conducted on a high friction type sliding rubber bearing. Tests were conducted under horizontal bidirectional loading and constant or fluctuant vertical loading. Regardless of the vertical loading methods, the maximum shear strain under bidirectional loadings increased approximately 40% - 50% compared to nominal shear strain. Reflecting mechanical characteristics of the bearing, the analytical model of elastic sliding bearings was proposed. This model accurately represented force-displacement relationships under horizontal bidirectional loading and constant or fluctuant vertical loading., 10335731
  • 低弾性高減衰積層ゴムの水平2方向復元力特性に関する研究
    菊地 優, 山本雅史, 石井 建, 佐々木頼孝
    日本建築学会構造系論文集, 79, 696, 257, 265, Architectural Institute of Japan, 2014年, [査読有り], [筆頭著者], [国内誌]
    日本語, 研究論文(学術雑誌), This paper focuses on the horizontal bidirectional mechanical properties of low-modulus G0.35 type high-damping rubber bearings. Tests of reduced-scale bearings were conducted to identify the mechanical properties of the bearings. The influence of bidirectional loading was strongly apparent in the measured hysteresis properties. A refinement to an existing analytical model was provided to predict the mechanical behavior of a wide variety of high-damping rubber bearings. Additional shear strain due to twist deformation was included to evaluate shear stress components in the bearing. Seismic response analyses were performed to evaluate the dynamic behavior of an isolated building under bidirectional earthquake excitations., 10335731
  • 可変摩擦ダンパーによる鋼構造超高層建築の地震時制振効果に関する解析的研究
    伊藤 智明, 白井 和貴, 菊地 優, 佐野 剛志
    鋼構造論文集, 21, 84, 84_57, 84_65, 社団法人 日本鋼構造協会, 2014年
    日本語, As a new damper which is suited to seismic retrofit for existing high-rise buildings, the authors have developed a passive variable friction damper (VFD) with displacement dependent damping force characteristics. In the present paper, in order to evaluate the response control effects of high-rise buildings incorporating VFDs, earthquake response analyses were conducted using thirty-story frame structure models with VFDs, with conventional friction dampers, or without dampers. The results indicated that VFDs can mitigate response story shear forces and column axial forces compared with conventional friction dampers.
  • Evaluation of Long-term Variation in Dynamic Properties of a Tall Reinforced Concrete Tower with Tuned Liquid Dampers               
    Ken Ishii, Masaru Kikuchi
    HKICEAS-648, Hong Kong International Conference on Engineering and Applied Science, 2013年12月, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • Strucural Characteristics of a hystorical reinforced templce building, Hibashi-honganji Hakodate Betsuin               
    KIKUCHI Masaru
    The 13th East Asia-Pacfic Conference on Structural Engineering and Construction, Sapporo, Japan, 2013年09月, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • Three-dimensional Mechanical Model for Circular Multilayered Elastomeric Bearings Considering Compression Modulus Distribution on the Rubber Pad
    Ken Ishii, Masaru Kikuchi, Yoriko Suzuki
    13th World Conference on Seismic Isolation, Energy Dissipation and Active Vibration Control of Structures, Sendai, Japan, 2013年09月, [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 10335731
  • 鉛プラグ入り積層ゴムの水平二方向限界特性
    仲村崇仁, 菊地 優, 石井 建, 河内山 修
    日本建築学会技術報告集, 19, 42, 471, 476, 2013年06月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), Ultimate behavior of Lead Rubber Bearing (LRB) and Natural Rubber Bearing (RB) was investigated by bi-directional loading tests. LRB specimens provided by 7 types small models, which have square and circular shape, varied lead plug diameters, lead plug disposition and rubber layers. RB specimen was provided by square shape without lead plug. In this study it was cleared that brake-shear-strain was not influenced by the cross-section shape, lead plug diameters, and lead plug dispositions. Moreover LRB wasn't spoiled for brake-shear-strain under the bi-directional loading. It was also found that the brake-shear-strain of LRB was the same as that of RB., 10335731
  • アンボンドPCaPC梁部材と対象とする断面解析モデルの適用性に関する一検討               
    松茂良諒, 越川武晃, 菊地優
    構造工学論文集, 59B, 73, 80, 2013年03月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌)
  • 正規化H2ノルム等高線図による回転慣性質量ダンパーのロバスト性を考慮した地震応答制御設計法
    白井和貴, 菊地 優
    日本建築学会構造系論文集, 78, 684, 261, 269, 2013年02月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), This paper presents a seismic response control design method considering robustness on building structures with inter-story rotational inertia mass dampers. The proposed method employs normalized contour maps of H2 norm (root mean square) or weighted H2 norm of transfer functions of systems. The concept of interval analysis methods is applied to deal with structural uncertainties which are assumed to be bounded. The influence of variations in parameters has been easily evaluated by these contour maps.
  • 鉛プラグ入り積層ゴムの水平二方向復元力特性に関する研究
    仲村崇仁, 菊地 優, 石井 建, 河内山修
    日本建築学会構造系論文集, 77, 681, 1663, 1671, 2012年11月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), Reduction of the horizontal deformation capacity of elastomeric isolation bearings under bi-directional loading has been one of the major concerns since that such a phenomenon was observed for high-damping rubber bearings. Using a newly constructed loading machine, a series of tests of lead rubber bearings (LRBs) were conducted to investigate their detailed mechanical characteristics under horizontal bi-directional deformation in the paper. The influences of the configurations, such as shape of cross section, diameter of a lead plug and aspect ratio, on the bi-directional behavior were carefully examined. Simulation analyses were also conducted to predict the bi-directional behavior of LRBs., 10335731
  • Dynamic Properties of a Tall Reinforced Concrete Tower with Tuned Liquid Dampers               
    Ken Ishii, Masaru Kikuchi, Yoriko Suzuki
    The 2012 World Congress on Advances in Civil, Environmental, and Materials Research, Seoul, Korea, 2012年08月, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • 変形履歴積分型復元力モデルを用いた高減衰積層ゴム免震構造物の地震応答解析
    加藤秀章, 森隆浩, 鮫島祐介, 室田伸夫, 菊地優, 張國鎭, 黄震興, 汪向榮
    構造工学論文集, 58B, 231, 240, 一般社団法人日本建築学会, 2012年03月, [査読有り], [国際共著], [国内誌]
    日本語, 研究論文(学術雑誌)
  • Response Modification Factor for the Design of Seismically Isolated Buildings               
    S. Kitayama, K. Ishii, M. Kikuchi
    Proceeding of the 15th World Conference on Earthquake Engineering, 2012年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • Safety Verificaion of Seismic Isolation System using Sliding Bearings against Long Period Earthquake Motions               
    H. Hibino, R. Maseki, A. Nii, S Minewaki, M. Yamamoto, H. Yoneda, M. Takayama, M. Kikuchi, M. Iiba
    Proceeding of the 15th World Conference on Earthquake Engineering, 2012年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • Seismic Response Analysis of Seismically Isolated Buildings with Multilayered Elastomeric Bearings Considering Rocking Behavior
    K. Ishii, M. Kikuchi, K. Shirai
    Proceeding of the 15th World Conference on Earthquake Engineering, 2012年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 10335731
  • Safety Verificaion of Seismic Isolation System Using Rubber Bearing Against Long-Period Earthquake Motion               
    M. Hikita, E. Takaoka, A. Kondo, T. Nishimura, S. Yamamoto, M. Takayama, M. Kikuchi, M. Iiba
    Proceeding of the 15th World Conference on Earthquake Engineering, 2012年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • Safety Verificaion of Seismic Isolation System Using Elasto-plastic Dampers against Long-Period Earthquake Motion               
    S. Yamamoto, T. Nishimura, K. Nakanishi, M. Hikita, Y. Takenaka, M. Takayama, M. Kikuchi, M. Iiba
    Proceeding of the 15th World Conference on Earthquake Engineering, 2012年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • Simulation analysis for the ultimate behavior of full-scale lead-rubber seismic isolation bearings               
    M. Kikuchi, I. D. Aiken, A. Kasalanati
    Proceeding of the 15th World Conference on Earthquake Engineering, 2012年, [筆頭著者], [国際共著], [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • Behavior of Sliding Rubber Bearings under Horizonal Bidirectional Loadings
    M. Yamamoto, S. Minewaki, N. Kamoshita, M. Kikuchi, K. Ishii, O. Kouchiyama, T. Nakamura
    Proceeding of the 15th World Conference on Earthquake Engineering, 2012年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 10335731
  • Behavior of lead rubber bearing under horizonal bi-directional loading test
    Takahito Nakamura, Osamu Kouchiyama, M. Kikuchi
    Proceeding of the 15th World Conference on Earthquake Engineering, 2012年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 10335731
  • Safety Verificaion of Seismic Isolation System using Oil and Viscous Dampers against Long Period Earthquake Motions               
    S Minewaki, M. Yamamoto, H. Yoneda, R. Maseki, I Nagashima, A. Nii, M. Takayama, M. Kikuchi, M. Iiba
    Proceeding of the 15th World Conference on Earthquake Engineering, 2012年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • A New Hysteresis Model Based On An Integral Type Deformation-history for Elastomeric Seismic Isolation Bearings               
    H. Kato, T. Mori, N. Mutota, S. Suzuki, M. Kikuchi
    Proceeding of the 15th World Conference on Earthquake Engineering, 2012年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • A New Analytical Model for Reinforced Concrete Bearm-Column Joints Subjected to Cyclic Loading               
    T. Saito, M. Kikuchi
    Proceeding of the 15th World Conference on Earthquake Engineering, 2012年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • 変位依存型の可変減衰力特性を有する摩擦ダンパーの開発
    白井和貴, 佐野剛志, 鈴木康正, 蔭山 満, 菊地 優
    日本建築学会技術報告集, 18, 38, 85, 90, 2012年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), A friction damper with displacement dependent variable damping force characteristics was developed. The damper was designed to decrease damping force when damper displacement exceeded a predetermined value. Therefore, the damper is ideal for aseismic retrofit of existing skyscraper buildings in preparation for long-period earthquake ground motions expected to occur in the near future. Dynamic loading tests were conducted on a full-scale steel frame with a brace-type variable friction damper to verify the damper performance. The damper exhibited on-target characteristics, stable performance, and a high endurance capacity under cyclic loadings.
  • 高減衰積層ゴムの変形履歴積分型復元力モデルに関する研究
    加藤秀章, 森隆浩, 室田伸夫, 石井 建, 菊地 優
    日本建築学会構造系論文集, 76, 667, 1721, 1728, 2011年09月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), A new hysteresis model for high-damping rubber bearings is proposed, which has been developed based on an elasto-plastic, integraltype deformation history constitutive law. One of the characteristics of the proposed model is the applicability of the same material parameters as the proposed model to finite element method analyses. Firstly, we derive the horizontal biaxial hysteresis model from the elasto-plastic constitutive law. Next, we compare the results of numerical analyses using the proposed hysteresis model with experimental results for tests of high-damping rubber bearings subjected to horizontal biaxial loading, and verify the validity of the proposed model. Lastly, we perform finite element method analyses and numerical analyses using a multi-shear springs model, and the results from each of these cases are compared with results given by the proposed model.
  • 積層ゴム内部の圧縮・曲げ弾性係数の分布に関する基礎的考察
    石井 建, 菊地 優
    日本建築学会 構造系論文集, 76, 666, 1425, 1431, 2011年08月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), This paper describes two types of normalized modulus distribution under compression and bending for a circular rubber with pad top and bottom surfaces that are bonded to rigid layers. The distribution is applied to a series of axial springs to account for the compressive and bending moduli of the rubber pad. The paper demonstrates thai the series of axial springs with varied modulus distribution has higher ratio of bending stifl'ness to compressive stiffness than the rubber pad. To define the correct ratio of bending stiffness to compressive stiffness, a nonlinear elastic model is provided for the axial springs. By using the varied modulus distribution and a nonlinear elastic model, the series of axial springs can produce much improved behavior over the uniform modulus assumption., 10335729
  • Bi-axial Horizontal Response for a Seismically-isolated Building with High-damping Rubber Bearings               
    Masashi Yamamoto, Masaru Kikuchi, Ken Ishii, Harumi Yoneda, Shigeo Minewaki, Hideaki Kato
    12th World Conference on Seismic Isolation, Energy Dissipation and Active Control of Structures, 2011年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • Three-dimensional analysis for square seismic isolation bearings under large shear deformations and high axial loads
    Masaru Kikuchi, Takahito Nakamura, Ian D. Aiken
    EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, 39, 13, 1513, 1531, JOHN WILEY & SONS LTD, 2010年10月, [査読有り], [筆頭著者], [国際共著], [国際誌]
    英語, 研究論文(学術雑誌), Square seismic isolation bearings are economical to manufacture, offer the advantage of simple connection configurations and have compact geometry requiring a minimum of space for installation. To be able to more effectively utilize square bearings for seismic isolation systems, a new mechanical model for predicting the large shear deformation behavior of square elastomeric isolation bearings is presented in this paper. The new model is developed by extending to three dimensions an existing model for elastomeric isolation bearings under severe axial loads and shear deformations. The model comprises multiple shear springs at the mid-height and a series of axial springs at the top and bottom boundaries. Static loading tests of square lead rubber isolation bearings were performed to investigate the influence of horizontal loading direction and axial load magnitude on bearing behavior. The test results showed that the ultimate behavior is strongly influenced by loading direction, especially under large shear deformation and high axial load. To confirm the validity of the model, analyses are performed of the loading tests of the square lead rubber isolation bearings. The results of analyses using the new model show very good agreement with the experimental results. Copyright (C) 2010 John Wiley & Sons, Ltd., 10335729
  • 大変形・高軸力下における高減衰積層ゴムの力学挙動予測に関する研究
    菊地 優, 石井 建, 加藤秀章
    構造工学論文集, 56B, 179, 188, 2010年03月, [査読有り], [筆頭著者], [国内誌]
    日本語, 研究論文(学術雑誌), 10335729
  • Three dimensional analysis for square seismic isolation bearings under large shear deformation and high axial loads
    Masaru Kikuchi, Ken. Ishii, Takahito Nakamura, Ian D. Aiken
    Joint conference proceedings, 7CUEE and 5ICEE, 1097, 1014, 2010年, [筆頭著者], [国際共著], [国際誌]
    英語, 研究論文(国際会議プロシーディングス), 10335729
  • せん断変形と偏心曲げモーメントを受ける免震積層ゴムの力学挙動解析
    石井 建, 菊地 優, 北村佳久, 仲村崇仁
    日本建築学会 構造系論文集, 75, 647, 87, 93, Architectural Institute of Japan, 2010年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), This paper presents a new analytical model for predicting the behavior of elastomeric seismic isolation bearings subject to combined eccentric bending moments and shear deformation. The mechanical model consists of a series of axial springs at the top, mid-height and bottom of the isolator. The model can account for end rotations of the isolator, and the overall isolator rotational stiffness can include the influence of the variation of vertical load on the isolator and the imposed shear deformation. To identify the mechanical characteristics of isolators, static bending tests under various combinations of vertical load and shear deformation were performed. The results of analyses using the new model show very good agreement with experimental observations.
  • 3次元並列多軸ばねを用いた角型鉛プラグ入り積層ゴムの大変形挙動解析
    菊地 優, 山本祥江, 仲村崇仁, 西村拓也, 田村和夫
    日本建築学会 構造系論文集, 74, 638, 647, 655, 2009年04月, [査読有り], [筆頭著者], [国内誌]
    日本語, 研究論文(学術雑誌), The paper describes a new analytical model for predicting the large displacement behavior of square lead-rubber isolation bearings. The present model is developed by extending to three dimensions an existing model for elastomeric isolation bearings under severe axial loads and shear deformations. Static loading tests of square lead-rubber bearings are performed to investigate the effect of loading direction on bearing behavior. The test results showed that the ultimate behavior is strongly influenced by loading direction, especially for large shear deformation and high axial load. The results of analyses using the new model show very good agreement with the experimental results.
  • 天然ゴム系積層ゴムの水平鉛直同時加力時の大変形挙動特性に関する研究               
    西村拓也, 山本祥江, 黒澤 到, 菊地 優, 甲斐芳郎, 仲村崇仁
    構造工学論文集, 55B, 517, 525, 2009年03月, [査読有り], [国内誌]
    日本語
  • A mechanical model for elastomeric seismic isolation bearings including the influence of axial load
    Sachie Yamamoto, Masaru Kikuchi, Masaiki Ueda, Ian D. Aiken
    EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, 38, 2, 157, 180, JOHN WILEY & SONS LTD, 2009年02月, [査読有り], [国際共著], [国際誌]
    英語, 研究論文(学術雑誌), For the purpose of predicting the large-displacement response of seismically isolated buildings, an analytical model for elastomeric isolation bearings is proposed. The model comprises shear and axial springs and a series of axial springs at the top and bottom boundaries. The properties of elastomeric bearings vary with the imposed vertical load. At large shear deformations, elastomeric bearings exhibit stiffening behavior under low axial stress and buckling under high axial stress. These properties depend on the interaction between the shear and axial forces. The proposed model includes interaction between shear and axial forces, nonlinear hysteresis, and dependence on axial stress. To confirm the validity of the model, analyses are performed for actual static loading tests of lead-rubber isolation bearings. The results of analyses using the new model show very good agreement with the experimental results. Seismic response analyses with the new model are also Conducted to demonstrate the behavior of' isolated buildings under severe earthquake excitations. The results obtained from the analyses with the new model differ in some cases from those given by existing models. Copyright (C) 2008 John Wiley & Sons, Ltd., 10335729
  • An analytical hysteresis model to predict the small shear strain behavior of high-damping rubber isolation bearings
    M. Kikuchi, K. Morihiro, I. D. Aiken
    PROTECTION OF HISTORICAL BUILDINGS - PROHITECH 09, VOL 1 AND 2, 1, 1, 689, +, CRC PRESS-TAYLOR & FRANCIS GROUP, 2009年, [筆頭著者], [国際共著], [国際誌]
    英語, 研究論文(国際会議プロシーディングス), This paper proposes an analytical hysteresis model to predict the small shear strain behavior of high-damping rubber isolation bearings (HDR). The National Museum of Western Art (NMWA) in Tokyo, Japan was seismically upgraded in 1998 with a seismic isolation system. The design analyses for the upgrade utilized an existing hysteresis model for HDR isolation bearings. The model was capable of predicting the nonlinear properties of HDR isolators for deformations expected in large earthquakes. Since the upgrade, the acceleration response of the building has been recorded for a number of small earthquakes. The maximum deformation of the HDR isolators in the small earthquakes was below the strain range for which the hysteresis model had been developed, so the small deformation force-displacement relationships for the isolation system were identified from the observed building acceleration records and the original HDR hysteresis model was extended to cover a broad range of shear strain.
  • 変動軸力の影響を考慮した鉛プラグ入り積層ゴムの限界特性に関する検討
    山本祥江, 菊地 優, 越川武晃, 上田正生
    日本建築学会 構造系論文集, 73, 634, 2101, 2110, 2008年12月, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), The widespread use of isolation has necessitated a better understanding of the more complex aspects of isolation device behvior. The porperties of seismic isolation devices depend upon the interaction between horizontal and vertical forces acting on the isolator. The actural hysteretic behavior of an isolation bearing under a structure subjected to severe earthwuake shaking is influenced by the variation of vertical load on the islator due to overturing forces. To identify the mechanical charcteristcs of lead-rubber isolators, cyclic shear tests of isolators under varying vetical load were conducted. The authors propose an analytical model for predicting the behavior of islators under varying vertical load conditions. The model can reflect the influence of verying vertical load on islator properties, and thios capability is confirmed by simulation analyses and comparison with the cyclic shear test results. The analytical model is also used to investigate the behavior of lead-rubber isolators under loadings more severe than typical design conditions.
  • On the response of yielding seismically isolated structures
    Masaru Kikuchi, Cameron J. Black, Ian D. Aiken
    EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, 37, 5, 659, 679, JOHN WILEY & SONS LTD, 2008年04月, [査読有り], [筆頭著者], [国際共著], [国際誌]
    英語, 研究論文(学術雑誌), This paper investigates the seismic response of yielding isolated structures. To establish a general understanding of the nonlinear response of seismically isolated structures, this study first investigates the nonlinear response of isolated structures subjected to steady-state harmonic motion and nonlinear transient ground excitation. The response of both viscously damped and hysteretically damped isolation systems is investigated in three phases. Initially, basic insights are gained through simple nonlinear two degrees of freedom (2-DOF) models subjected to harmonic motion of varying frequencies. Next, the transient response analysis of the nonlinear 2-DOF model is investigated for a wide range of isolation system and superstructure properties. The results obtained from both approaches indicate that the yielding behavior of a structure on an isolation system is significantly different from that of the comparable fixed-base structure. Finally, the response of the nonlinear 2-DOF system model is compared with that of a 15-story, three-dimensional model. Based on the results of these analytical investigations, some important considerations for the design of seismically isolated structures are presented. Copyright (C) 2007 John Wiley & Sons, Ltd.
  • Analytical modeling of elastomeric isolation bearings unders severe axial load and shear deformations               
    S. Yamamoto, M. Kikuchi, I. D. Aiken
    Proceedings of the 14th Word Conference on Earthquake Engineering (CR-ROM), 05-06-0018, 2008年, [査読有り], [国際共著], [国際誌]
    英語
  • 接合部のせん断変形を考慮したRC骨組の非線形挙動解析               
    斎藤隆典, 越川武晃, 上田正生, 菊地 優
    日本建築学会 構造系論文集, 622, 99, 106, 2007年12月, [査読有り], [国内誌]
    日本語
  • 並列多軸ばねを用いた積層ゴムの大変形挙動解析               
    山本祥江, 菊地 優, 越川武晃, 上田正生
    日本建築学会 構造系論文集, 618, 81, 88, 2007年08月, [査読有り], [国内誌]
    日本語
  • 鉛プラグ入り積層ゴムの大変形復元力モデルに関する研究
    小槻 淳, 山本祥江, 菊地 優, 越川武晃, 上田正生
    構造工学論文集, 53B, 9, 16, 一般社団法人日本建築学会, 2007年03月, [査読有り], [国内誌]
    日本語, An analytical model for lead-rubber bearings is proposed to predict bearing force-displacement behavior under extremely large deformation. Static loading tests of a lead-rubber bearing under a range of axial loads were performed to assist in the development of a new hysteresis model for large shear deformation behavior. The hysteresis model is combined with the mechanical model based on the two-spring model previously proposed by Koh and Kelly. The bearing test results showed that the mechanical properties, such as changes in shear stiffness and buckling characteristics, varied with the applied axial load. The proposed model can successfully predict a variety of force-displacement relationships for lead-rubber bearings taking into account the level of applied axial load.
  • An analytical model for lead-rubber bearings under large deformations
    M. Kikuchi, S. Yamamoto, I. D. Aiken
    Proceedings of the 8th Pacific Conference on Earthquake Engineering (CD-ROM), 53, 9, 16, 一般社団法人日本建築学会, 2007年, [筆頭著者], [国際共著], [国際誌]
    英語, 研究論文(国際会議プロシーディングス), An analytical model for lead-rubber bearings is proposed to predict bearing force-displacement behavior under extremely large deformation. Static loading tests of a lead-rubber bearing under a range of axial loads were performed to assist in the development of a new hysteresis model for large shear deformation behavior. The hysteresis model is combined with the mechanical model based on the two-spring model previously proposed by Koh and Kelly. The bearing test results showed that the mechanical properties, such as changes in shear stiffness and buckling characteristics, varied with the applied axial load. The proposed model can successfully predict a variety of force-displacement relationships for lead-rubber bearings taking into account the level of applied axial load.
  • アンボンドPC鋼材を用いたPCa圧着梁部材の履歴特性モデルに関する研究               
    小林正仁, 越川武晃, 上田正生, 菊地 優
    コンクリート工学 年次論文集, 29, 3, 457, 462, 2007年, [査読有り], [国内誌]
    日本語
  • 断層破壊シナリオとその生起確率を考慮した地震ハザード解析に関する研究
    壇 一男, 神原 浩, 藤川 智, 菊地 優
    日本建築学会 構造系論文集, 71, 602, 119, 128, 日本建築学会, 2006年04月, [査読有り], [国内誌]
    日本語, Prediction technique of strong ground motions has been intensively developed in Japan since the 1995 Hyogo-Ken Nanbu earthquake (M_J 7.3), and it has been applied to the practical prediction for inland earthquakes and plate-boundary earthquakes by Japanese Government. On the other hand, recent earthquakes of the 2001 Geiyo earthquake (M_J 6.4) and the 2004 Mid Niigata prefecture earthquake (M_J 6.8) arose not only requirements of safety of lives and structural elements but also requirements of function of equipments and industrial lines. These requirements are well realized in the performance-based design of structures. Hence, we proposed a method of seismic hazard analysis based on fault rupture scenarios and their occurrence probability for implementation of strong ground motions predicted by fault models in performance-based design of structures.
  • 補強材の付着すべりを考慮した鉄筋コンクリート床板の大変形・ポストピーク解析
    水野雅枝, 上田正生, 越川武晃, 菊地 優
    日本建築学会 構造系論文集, 71, 602, 153, 160, 日本建築学会, 2006年04月, [査読有り], [国内誌]
    日本語, This paper deals with the large deflection analysis of reinforced concrete slabs considering the effect of bond slip of reinforcement. Johansen's yield-line theory is well known method of calculating the ultimate strength of RC slab. However, it under-estimates the ultimate strength of slabs which have fixed edges because of the membrane stress. In order to take it into account, geometrical nonlinearity should be considered. In this paper, we propose the method of large deflection analysis which is based on Murray and Wilson's method. In order to verify the analytical method, three numerical examples are given and the results are compared with the experimental results.
  • 主筋の付着特性に影響を及ぼす各種要因を考慮したRC骨組の履歴挙動解析               
    斎藤隆典, 越川武晃, 上田正生, 菊地 優
    構造工学論文集, 52B, 101, 108, 2006年03月, [査読有り], [国内誌]
    日本語
  • 積層ゴムの大変形領域の特性を考慮した免震建物の地震時挙動               
    山本祥江, 菊地 優, 越川武晃, 上田正生
    構造工学論文集, 52B, 221, 229, 2006年02月, [査読有り], [国内誌]
    日本語
  • Free vibration analysis by the superposition method of rectangular Mindlin plates with internal columns resting on uniform elastic edge supports
    F Ohya, M Ueda, T Uchiyama, M Kikuchi
    JOURNAL OF SOUND AND VIBRATION, 289, 1-2, 1, 24, ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2006年01月, [査読有り], [国際誌]
    英語, 研究論文(学術雑誌), Free vibration analysis of rectangular Mindlin plates is carried out via the superposition method and is shown to produce accurate results. The analytical method proposed by the authors in this paper solves the problem for the case where the plate has simultaneous elastic edge and internal supports. The conditions of edge supports are uniform lateral, rotational and torsional elastic supports, whereas, the internal supports are column supports with finite area. Compatibility between the plate and column is achieved by requiring that the column and plate rotations be equal. The results presented herein are verified through comparison with results presented by others. Numerical examples presented in this study confirm that the analytical method is able to model the property of the elastic edge supports while simultaneously considering the effect of column restraint, an effect which increases with column number and area. (c) 2005 Elsevier Ltd. All rights reserved.
  • アンボンドPC圧着工法を用いたエネルギー吸収PCa架構の履歴挙動に関する解析的研究
    越川武晃, 上田正生, 菊地 優, 小林正仁
    コンクリート工学 年次論文集, 28, 2, 73, 78, 日本コンクリート工学協会, 2006年, [査読有り], [国内誌]
    日本語, 本論文では,クリティカル断面となる圧着接合部に普通強度鉄筋を通し配筋し,原点指向性を維持しつつ鉄筋の降伏によってエネルギー吸収を図るアンボンドPC圧着型PCa架構を対象に,著者等の既往の解析法を用いた履歴挙動解析を行い,実験結果との比較ならびにパラメトリックスタディを通して,この種の架講の構造特性について解析的に検証を行った。
  • 柱梁接合部内主筋の付着すべり分布を考慮したRC骨組の履歴挙動解析               
    斉藤隆典, 越川武晃, 上田正生, 菊地 優
    コンクリート工学 年次論文集, 28, 2, 85, 90, 2006年, [査読有り], [国内誌]
    日本語
  • PC外ケーブルによる既存RCスラブの補強方法について
    森廣和幸, 上田正生, 越川武晃, 菊地 優
    コンクリート工学 年次論文集, 28, 2, 493, 498, 日本コンクリート工学協会, 2006年, [査読有り], [国内誌]
    日本語, 本研究は,過去に受けた過大な載荷履歴により,たわみやひび割れ障害を受けたスラブを,PC外ケーブルよって再生をはかる補強工法について報告するものである。即ち,補強と同時に,当初の設計荷重を上回る積載を可能とするレトロフィットを意図した補強設計の考え方と,実際の試行・施工手順,更にはその後の載荷実験結果について考察をくわえている。
  • 履歴系ダンパーを用いた免震構造物の非線形定常振動
    菊地 優, 山本祥江, 田村和夫, 上田正生
    日本建築学会 構造系論文集, 70, 592, 75, 82, 日本建築学会, 2005年06月, [査読有り], [筆頭著者], [国内誌]
    日本語, The study of the steady-state vibration of a system under sinusoidal excitation can provide important insights into the more general dynamic response structures. The response of seismically-isolated structures with viscously-damped isolation system was previously studied by the authors. This paper presents the non-linear steady-state vibration of seismically-isolated structures with hysteretically-damping isolation system. The solution method for the steady-state vibration of the non-linear system is based on the work of Tajimi, and expanded to seismically-isolated structures. The non-linear superstructure behavior is significantly different from that of fixed-base structure. Consequently, the important aspects for isolated structure design is highlighted.
  • 周辺が一様に弾性支持されたフラットプレート構造物のスラブの鉛直自由振動解析
    大家 史, 上田正生, 内山武司, 菊地 優
    日本建築学会 構造系論文集, 70, 588, 95, 102, 日本建築学会, 2005年01月, [査読有り], [国内誌]
    日本語, The use of flat-plate structures have increased because this type of structure can realize optimum and flexible space utilization. In the application of flat-plate structures, slab resonance should be an important consideration, because of potential problems such as incorrect operation of equipment in manufacturing facilities or occupant discomfort in residential structures. However there are few studies on the free vibration analysis of slabs within flat-plate structures. In this paper, the free vibration analyses of plates with columns resting on lateral, rotational and torsional elastic edge supports uniformly are carried out by use of the superposition method based on the Mindlin plate theory. In order to study the vibration properties of the plate, column size, plate aspect ratio and plate thickness ratio are set up as evaluation parameters.
  • チモシェンコ梁要素を用いた曲げとせん断を受けるRC梁の材料非線形解析
    越川武晃, 上田正生, 菊地 優
    コンクリート工学 年次論文集, 27, 2, 67, 72, 日本コンクリート工学協会, 2005年, [査読有り], [国内誌]
    日本語, ファイバーモデルを用いて曲げとせん断を受けるRC梁に発生する斜めせん断亀裂を表現する一手法として,チモシェンコ梁要素を用いたRC梁の材料非線形解析法を提案した。まず有限要素法への定式化の概要と,垂直応力と横せん断応力による2軸応力状態を想定したコンクリートの構成則の取扱いについて記述した。更に,既往の実験結果を対象とした数値計算例を示し,コンクリートに1軸の構成則を用いた従来の解析法との比較を通して,本解析法による荷重一変位応答,亀裂の発生・分布性状について検証した。
  • 柱梁接合部における主筋の付着すべりを考慮したRC平面骨組の履歴挙動解析               
    齊藤隆典, 越川武晃, 上田正生, 菊地 優
    コンクリート工学 年次論文集, 27, 2, 73, 78, 2005年, [査読有り], [国内誌]
    日本語
  • 粘性系ダンパーを用いた免震構造物の非線形定常振動               
    菊地 優, 田村和夫, 上田正生
    日本建築学会 構造系論文集, 576, 63, 70, 2004年02月, [査読有り], [筆頭著者], [国内誌]
    日本語
  • Computer program for three-dimensional nonlinear dynamic response analysis of seismically-isolated buildings               
    M. Kikuchi, K. Watanabe
    Proceedings of the 13th World Conference on Earthquake Engineering (CD-ROM), 600, 2004年, [査読有り], [筆頭著者], [国際誌]
    英語
  • Vibration analysis of reinforced concrete beam members including bond-slip reinforcement               
    K. Inoue, M. Kikuchi, M. Ueda, T. Koshikawa
    Proceedings of the 13th World Conference on Earthquake Engineering (CD-ROM), 604, 2004年, [査読有り], [国際誌]
    英語
  • Seismic Response of Isolated Structures Depending on Hysteresis Models for Isolation Devices               
    Masaru Kikuchi, Ian D. Aiken, Yoshihisa Kitamura, Masaiki Ueda
    JSSI 10th Anniversary Symposium on Performance of Response Controlled Buildings (CD-ROM), S3-3, 2004年, [査読有り], [筆頭著者], [国際共著], [国際誌]
    英語
  • 面外せん断変形ならびに補強材の付着すべりの影響を考慮した有限要素解析               
    水野雅枝, 上田正生, 菊地 優, 内山武司
    構造工学論文集, 50B, 279, 285, 2004年, [査読有り], [国内誌]
    日本語
  • フラットプレート構造物のスラブの鉛直自由振動解析(その2)スラブの周辺が鉛直および回転方向に対して一様に弾性支持された場合
    大家 史, 上田正生, 内山武司, 菊地 優
    構造工学論文集, 50B, 269, 277, 一般社団法人日本建築学会, 2004年, [査読有り], [国内誌]
    日本語, The use of flat-plate structures will increase in the future because this type of structure can realize optimum and flexible space utilization. In the application of flat-plate structures, slab resonance should be an important consideration, because of potential problems such as incorrect operation of equipment in manufacturing facilities or occupant discomfort in residential structures. However there are few studies on the free vibration analysis of slabs within flat-plate structures. In this study the free vibration analyses of plates with columns resting on lateral and rotational elastic edge support uniformly are carried out by use of the superposition method which based on Mindlin plate theory. In order to study the vibration properties of the plate, column size and plate thickness ratio are set up as evaluation parameters.
  • 補強材の付着すべりを考慮したコンクリート梁・柱部材の大変形・ポストピーク挙動解析
    越川武晃, 上田正生, 和田俊良, 菊地 優
    日本建築学会 構造系論文集, 69, 580, 69, 76, 日本建築学会, 2004年, [査読有り], [国内誌]
    日本語, The large deformation/post-peak behavior analysis method of concrete beams and columns considering bond-slip of reinforcement is developed. The analytical procedure is capable of predicting the response of concrete beams and columns under axial force and biaxial bending in the material and geometrical nonlinear domains, including post-peak behavior using the incremental arch length method. The paper gives an outline of the nonlinear analysis method which includes the effect of bond-slip of reinforcement to handle the large deformation region, and three numerical examples are given to illustrate the use of the proposed procedure.
  • 補強材の付着すべりを考慮したコンクリート梁部材の自由振動解析               
    井上圭一, 菊地 優, 上田正生
    日本建築学会 構造系論文集, 580, 77, 84, 2004年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌)
  • 緊張鋼材の付着すべりを考慮した圧着型PcaPC梁-柱部材の履歴挙動解析
    越川武晃, 齊藤隆典, 上田正生, 菊地 優
    コンクリート工学 年次論文集, 26, 2, 37, 42, 日本コンクリート工学協会, 2004年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), 本論文は,部材全長にわたるPC鋼材の付着すべり現象を考慮した,繰り返し荷重を受ける圧着型プレキャスト・プレストレストコンクリート(PCaPC)梁」柱部材の材料非線形解析法について報告するものである。本論においては更に,本解析結果と既往の実験結果との比較を通して,特に圧着接合面近傍におけるPC鋼材の抜け出し現象が,この種の部材の変形挙動に及ぼす影響についても考察されている。
  • フラットプレート構造物のスラブの鉛直自由振動解析
    大家 史, 上田正生, 内山武司, 菊地 優
    構造工学論文集, 49B, 275, 282, 一般社団法人日本建築学会, 2003年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), The use of flat-plate structures will increase in the future, because this type of structure can realize optimum and flexible space utilization. In the application of flat-plate structures, slab resonance should be an important consideration, because of potential problems such as incorrect operation of equipment in manufacturing facilities, or occupant discomfort in residential structures. However, there are few studies on the free vibration analysis of slabs within flat-plate structures. In this study, free vibration analyses of plates with columns resting all-edges-simply-supported and all-edges-clamped are performed by using the superposition method which based on Mindlin plate theory. In order to study the vibration properties of the plate, column size and plate thickness ratio are set up as evaluation parameters.
  • 履歴減衰型免震部材の復元力モデルに関する研究
    菊地 優, 北村佳久, 井上圭一, 上田正生
    日本建築学会 構造系論文集, 68, 565, 63, 71, 日本建築学会, 2003年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), For the purpose of accurately predicting the seismic response of an isolated building, an analytical model for seismic isolation devices with hysteretic damping is proposed. The proposed model is capable of well-predicting the force-displacement relationships of various different types of devices, high-damping rubber bearings, lead-rubber bearings, and two types of steel dampers. Seismic response analyses are conducted to study the effectiveness of both existing models and the proposed model. The responses given by the existing models are mostly conservative. This fact indicates that the proposed model can be used to evaluate the performance of isolation devices accurately and effectively.
  • やじろべえ型免震構造(SFS21)の開発               
    堀 富博, 真瀬伸治, 磯田和彦, 猿田正明, 北村佳久, 佐武直紀, 菊地 優
    日本建築学会 技術報告集, 17, 107, 112, 2003年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌)
  • 補強材の付着すべりを考慮した鉄筋コンクリート床板の材料非線形解析
    水野雅枝, 上田正生, 菊地 優, 内山武司
    日本建築学会 構造系論文集, 68, 569, 55, 63, 日本建築学会, 2003年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), This paper deals with the material nonlinear analysis of reinforced concrete slabs considering the effect of bond slip of reinforcement. Only a small number of studies have been reported in the literature that approximately consider the effect of reinforcement bond slip in two-way reinforced concrete slabs, and almost no cases are found in which material nonlinear analysis is used to rigorously consider the effect. In this paper a potential energy functional is first derived, and then a finite element formulation of the problem is implemented. In order to verify the analytical method five numerical examples are given and the results compared with experimental results.
  • 補強材の付着すべりを考慮した2軸曲げを受けるコンクリート梁部材の大変形解析
    越川武晃, 上田正生, 和田俊良, 菊地 優
    コンクリート工学 年次論文集, 25, 2, 445, 450, 日本コンクリート工学協会, 2003年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), 本論文は,個々の梁要素内では微小変形を保持しながら,部材全体として大変形領域をも容易に取り扱うことが可能な,補強材の付着すべりを考慮した2軸曲げを受けるコンクリート梁部材の材料非線形解析手法について報告するものである。本論では,まず本解析法の定式化の概要について示されており,次いで既往の実験結果との比較により,本解析法の妥当性が検証されている。
  • Seismic Isolation of a Building with Large Eccentricity               
    Y. Kitamura, M. Kikuchi, H. Nakashima, K. Nakagawa
    SEWC2002 Structural Engineers World Congress, 2002年, [査読有り], [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • Seismic Behavior of a Reinforced Concrete Building due to Large Vertical Ground Motions in Near-Source Regions               
    M. Kikuchi, K. Dan, K. Yashiro
    Proceedings of the 12th World Conference on Earthquake Engineering, 1876, 2000年, [査読有り], [筆頭著者], [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • 引張力を受ける積層ゴムの復元力特性に関する研究
    菊地 優, 北村佳久, 林 章二, 河島庸一, 坂口 達, 山田親文
    日本建築学会 構造系論文集, 64, 524, 57, 64, 日本建築学会, 1999年, [査読有り], [筆頭著者], [国内誌]
    日本語, 研究論文(学術雑誌), This paper describes the vertical behavior of elastomeric isolation bearings. A study consists of three phases. In the first phase, dynamic loading tests are conducted. Two types of high-damping rubber bearings which differ in thickness of flange-plates are used. Second, finite element analyses are performed to simulate the test results. Both the tests and the analysis results show that the flange-plates has significant effect on tension modulus. Third, a hysteresis model is proposed. Good agreement between the experimental and the analysis results shows that the model can be an effective numerical tool to predict the seismic response of isolated buildings.
  • 積層ゴムに引張力が生じる免震建物の地震応答解析
    菊地 優, 田村和夫, 北村佳久
    第10回日本地震工学シンポジウム論文集, 235, 240, 1998年, [査読有り], [筆頭著者], [国内誌]
    日本語, 研究論文(学術雑誌)
  • An analytical hysteresis model for elastomeric seismic isolation bearings
    Masaru Kikuchi, Ian D. Aiken
    EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, 26, 2, 215, 231, JOHN WILEY & SONS LTD, 1997年02月, [査読有り], [筆頭著者], [国際共著], [国際誌]
    英語, 研究論文(学術雑誌), For the purpose of accurately predicting the seismic response of base-isolated structures, an analytical hysteresis model for elastomeric seismic isolation bearings is proposed. An extensive series of experimental tests of four types of seismic isolation bearings--two types of high-damping rubber bearings, one type of lead-rubber bearing and one type of silicon rubber bearing--was carried out with the objective of fully identifying their mechanical characteristics. The proposed model is capable of well-predicting the mechanical properties of each type of elastomeric bearing into the large strain range. Earthquake simulator tests were also conducted after the loading tests of the individual bearings. In order to show the validity of the proposed model, non-linear dynamic analyses were conducted to simulate the earthquake simulator test results. Good agreement between the experimental and analytical results shows that the model can be an effective numerical tool to predict not only the peak response value but also the force-displacement relationship of the isolators and floor response spectra for isolated structures.
  • 1993年釧路沖地震および1994年北海道南西沖地震で被害を受けた鉄筋コンクリート造建物の地震応答解析
    菊地 優, 壇 一男, 城 攻, 後藤康明, 田中英朗, 八代和彦
    日本建築学会 構造系論文集, 62, 495, 53, 62, 日本建築学会, 1997年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), Four buildings at the Kushiro Technical High School, damaged in the 1993 Kushiro-Oki and the 1994 Hokkaido-Toho-Oki earthquakes, were modeled as an assembly of nonlinear elements to verify our present techniques for earthquake-resistant design of structures. The input motions were independently evaluated based on the strong motions recorded on the ground at the Kushiro District Meteorological Observatory, 2km west of the school, and the soil-structure interaction was taken into account. The results of the dynamic response analysis showed a good agreement with the detail of different degree of the damage to the four buildings.
  • 1993年北海道南西沖地震の最大余震(M6.5)で得られた大加速度記録に関する検討
    壇 一男, 菊地 優, 福喜多 輝, 西村 功
    日本建築学会 構造系論文集, 62, 495, 45, 52, 日本建築学会, 1997年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌), A very large acceleration of 1.6 g was observed on the first floor of the Meiwa Elementary School, Hokkaido, during the largest aftershock of the 1993 Hokkaido-Nansei-Oki earthquake. In order to investigate the cause of this very large acceleration, this paper described the building three-dimensionally as an assembly of nonlinear elements because its plan was not a simple rectangle, and then the base-rock motions were estimated at a depth of 8.6 m after evaluating the soil-structure interaction. The resultant base-rock motions made it clear that the large acceleration of 1.6 g was ascribed mainly to the amplification factor of up to 30 at about 4 Hz from the base rock to the first floor of the building.
  • Dynamic Response Analyses of Reinforced Concrete Buildings damaged in the 1993 Kushiro-oki Earthquake of M7.8 in Japan               
    K. Dan, M. Kikuchi
    Proceedings of the 11th World Conference on Earthquake Engineering, 1164, 1996年, [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • 免震・防振システムの振動特性に関する研究
    菊地 優, 林 章二, 渡辺弘之
    構造工学論文集, 41B, 69, 78, 1995年, [査読有り], [筆頭著者], [国内誌]
    日本語, 研究論文(学術雑誌)
  • 免震構造物の安全性評価に関する一考察
    菊地 優, 田村和夫, 和田 章
    日本建築学会 構造系論文集, 60, 470, 65, 73, 日本建築学会, 1995年, [査読有り], [筆頭著者], [国内誌]
    日本語, 研究論文(学術雑誌), This paper describes a series of seismic fragility analyses of base-isolated structures considering non-linear superstructure behavior. The Latin hypercube sampling technique is applied to construct a series of samples that explicitly account for non-Linear behavior. Fragility curves are generated that evaluate the limit state based on maximum superstructure ductility ratio. The study shows that base-isolation systems have a significant advantage for seismic protection compared with fixed-base structures. However, careful consideration should be given to the fact that plastic deformation demands on the superstructure can increase dramatically after yielding if the super-structure is designed anticipating a reduced seismic lateral shear force.
  • 建物免震用積層ゴムの復元力特性に関する研究
    菊地 優, 猿田正明, 田村和夫
    構造工学論文集, 40B, 177, 188, 1994年, [査読有り], [筆頭著者], [国内誌]
    日本語, 研究論文(学術雑誌)
  • 免震構造物のエネルギー応答に関する実験的研究               
    菊地 優, 猿田正明, 田村和夫
    第9回日本地震工学シンポジウム論文集, 1813, 1818, 1994年, [査読有り], [筆頭著者], [国内誌]
    日本語, 研究論文(学術雑誌)
  • 免震・防振システムの振動特性に関する実験的研究               
    林 章二, 菊地 優, 渡辺弘之, 芳沢利和, 福田 健
    第9回日本地震工学シンポジウム論文集, 1807, 1812, 1994年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌)
  • 1976年中国唐山地震(M7.8)によって被害を受けた煙突の挙動シミュレーション               
    壇 一男, 渡辺宏一, 菊地 優
    第9回日本地震工学シンポジウム論文集, 679, 684, 1994年, [査読有り], [国内誌]
    日本語, 研究論文(学術雑誌)
  • 鉄筋コンクリート造免震構造物の振動台実験
    菊地 優, 猿田正明, 田村和夫, James M. Kelly, Ian, D. Aiken, Peter W. Clark
    日本建築学会 構造系論文集, 59, 462, 69, 78, 日本建築学会, 1994年, [査読有り], [筆頭著者], [国内誌]
    日本語, 研究論文(学術雑誌), This paper describes earthquake simulator tests of a 1/2.5-scale model of an existing base-isolated, three-story reinforced-concrete building. Two types of high-damping rubber bearings and one type of lead-rubber bearing were used in these tests. Moderate and extreme input motions were applied to the model to study the ultimate behavior of the isolated structure. Dynamic analyses were conducted to simulate the response to both moderate and extreme input tests, using a previously-developed analytical model. Good agreement between the experimental and analytical results was obtained, and the analytical model was confirmed to be suitable for representing the mechanical properties of bearings.
  • Design- and Ultimate-Level Earthquake Tests of a 1/2.5-scale Base-Isolation Reinforced-Concrete Building               
    Ian D. Aiken, Peter W. Clark, M. Kikuchi
    Proceedings of Seminar on Seismic Isolation, Passive Energy Dissipation, and Active Control, ATC 17-1, 1, 281, 292, 1993年, [査読有り], [国際共著], [国際誌]
    英語, 研究論文(国際会議プロシーディングス)
  • 1993年釧路沖地震(M7.8)の釧路地方気象台における強震記録のもつ建物破壊力に関する検討
    壇 一男, 渡辺宏一, 菊地 優, 海老原学
    日本建築学会 構造系論文集, 454, 51, 60, 一般社団法人日本建築学会, 1993年, [査読有り], [国内誌]
    英語, 研究論文(学術雑誌), The strong-motion records at the Kushiro District Meteorological Observatory from the 1993 Kushiro-Oki earthquake were applied to rigid-frame structures of different types. The total plastic energy dissipation of short period structures under the records was larger than that under the design input motions, while the energy dissipation of long period structures was comparable or smaller. The response level-of a low building with a short natural period showed that the damage should be moderate or severe. But, the actual damage to such a kind of buildings was rather slight around the observatory. The earthquake resistant capacity of non-structural components should be appropriately evaluated in design process.
  • EXPERIMENTAL STUDIES OF THE MECHANICAL CHARACTERISTICS OF 3 TYPES OF SEISMIC ISOLATION BEARINGS
    ID AIKEN, JM KELLY, PW CLARK, K TAMURA, M KIKUCHI, T ITOH
    PROCEEDINGS OF THE TENTH WORLD CONFERENCE ON EARTHQUAKE ENGINEERING, VOLS 1-10, 2281, 2286, A A BALKEMA, 1992年, [査読有り], [国際共著], [国際誌]
    英語, 研究論文(国際会議プロシーディングス)

その他活動・業績

書籍等出版物

  • 大振幅地震動に対する免震構造の設計               
    (5) 日本建築学会, 2020年, [分担執筆]
  • Seismic structural health monitoring : from theory to successful applications
    Limongelli, Maria Pina, Çelebi, Mehmet
    Springer, 2019年, 9783030139759, xii, 447 p., 英語, [分担執筆]
  • 免震・制震ハンドブック               
    日本免震構造協会
    2014年07月, [共編者(共編著者)]
  • 免震構造設計指針               
    日本建築学会
    2013年10月, [分担執筆]
  • 長周期地震動と建築物の耐震性               
    菊地 優
    日本建築学会, 2007年, [分担執筆]

講演・口頭発表等

  • 多様な地震動に備える免震構造               
    菊地 優
    第13回振動技術展, 2022年02月03日, 日本語
    [招待講演]
  • 繰り返し載荷を受ける免震部材の熱力学連成挙動               
    菊地優
    日本建築学会近畿支部シンポジウム「巨大地震に備えて免震・制振技術に期待すること」, 2019年11月19日, 日本語, 口頭発表(招待・特別)
    [招待講演]
  • 免震建築の現状と将来展望               
    菊地 優
    自動車技術会関東支部, 2019年01月22日, 日本語, 口頭発表(招待・特別)
    [招待講演], [国内会議]
  • 巨大地震に備える免震構造               
    菊地 優
    日本振動技術協会講演会, 2018年01月22日, 日本語, 口頭発表(基調)
    [招待講演], [国内会議]
  • 免震建築の現状の課題と将来展望               
    菊地 優
    第17回免震フォーラム, 2017年12月18日, 日本語, 口頭発表(基調)
    [招待講演], [国内会議]
  • 免震構造の実態性能と社会の評価               
    菊地 優
    第4回損害保険鑑定人フォーラム, 2017年11月10日, 日本語, 口頭発表(基調)
    [招待講演], [国内会議]
  • An Advanced Hysteresis Model of High-Damping Rubber Bearings for Seismic Isolation               
    KIKUCHI Masaru
    16th Scientific Conferernce of the memory of Professor Danilovsky, 2017年10月18日, 英語, 口頭発表(招待・特別)
    [招待講演], [国際会議]
  • Why do we need seismic isolation?               
    菊地 優
    16th Scientific Conferernce of the memory of Professor Danilovsky, 2017年10月17日, 英語, 口頭発表(基調)
    [招待講演], [国際会議]
  • 構造工学が担う建築歴史遺産の継承               
    菊地 優
    第63回構造工学シンポジウム, 2017年04月22日, 日本語, シンポジウム・ワークショップパネル(指名)
    [招待講演], [国内会議]
  • Vibration Control Technologies for Building Structures in Japan               
    菊地 優
    New Idea of New Century, Pacific National University, Khabarovsk, Russia, 2017年02月22日, 英語, 口頭発表(招待・特別)
    [招待講演]
  • 大振幅地震動に備える免震構造               
    菊地 優
    JSCA北海道支部功労賞受賞記念講演会, 2016年11月15日, 日本語, 口頭発表(基調)
    [招待講演], [国内会議]
  • Seismic Isolation Devices, Principle and application of SI devices, introduction of examples               
    菊地 優
    Semiar on Seismic Isolation in Turkey, Ankara, Turkey, 2016年03月22日, 英語, 口頭発表(招待・特別)
    [招待講演]
  • 免震構造物の多次元地震時挙動               
    菊地 優
    耐震工学研究会, 2015年07月17日, 日本語, 公開講演,セミナー,チュートリアル,講習,講義等
    [招待講演]
  • 免震構造の現状と今後               
    菊地 優
    鳥取発 免震・スマートハウス研究会, 2015年03月11日, 日本語, 公開講演,セミナー,チュートリアル,講習,講義等
    [招待講演]
  • Seismic Isolation Technology in Japan               
    菊地 優
    Seminar on Construction Technology in Hokkaido, Sakhalin region Government, Yuzino-Sakhalinsk, Russia, 2014年10月02日, ロシア語, 口頭発表(招待・特別)
    [招待講演]
  • Seismic Isolation in the 2011 Tohoku Earthquake               
    菊地 優
    RFS Seminar, PEER Center, University of California, Berkeley, USA, 2012年11月28日, 英語, 口頭発表(招待・特別)
    [招待講演]
  • 東日本大震災から学ぶ免震構造のあり方               
    菊地 優
    第15回免震フォーラム, 2012年08月31日, 日本語, 口頭発表(基調)
    [招待講演], [国内会議]
  • 建築物の免震について-免震に関する最新の話題-               
    菊地 優
    札幌建築クラブ講演会, 2010年06月16日, 日本語, 口頭発表(基調)
    [招待講演], [国内会議]
  • 未来に残したい歴史的建築物~地震から守るために~               
    菊地 優
    日本建築家協会北海道支部, 2009年12月04日, 日本語
    [招待講演]
  • 免震構造の最新技術開発トレンド               
    菊地 優
    日本免震構造協会, 2008年11月, 日本語
    [招待講演]
  • プレート境界の巨大地震-2003年十勝沖地震から何を学ぶか               
    菊地 優
    自然災害研究防災フォーラム, 2006年03月29日, 日本語
    [招待講演]
  • 振動制御による耐震改修と地震防災               
    菊地 優
    JSCA北海道支部, 2006年03月29日, 日本語

担当経験のある科目_授業

  • コンピューティング演習               
    北海道大学
  • 空間構造デザイン特別演習               
    北海道大学
  • 空間構造デザイン特論               
    北海道大学
  • 構造解析Ⅱ               
    北海道大学
  • 物理学Ⅰ               
    北海道大学
  • 応用図形科学               
    北海道大学
  • 基礎図形科学               
    北海道大学

所属学協会

  • 2020年01月
    Earthquake Engineering Research Institute               
  • 日本原子力学会               
  • 日本地震工学会               
  • 日本免震構造協会               
  • 日本建築学会               

共同研究・競争的資金等の研究課題

  • 多様な地震動に備える高機能免震構造の開発
    科学研究費補助金(基盤研究(A))
    2019年04月 - 2022年03月
    菊地 優
    文部科学省, 研究代表者, 競争的資金
  • 平成30年北海道胆振東部地震とその災害に関する総合調査
    科学研究費助成事業
    2018年10月04日 - 2019年03月31日
    高橋 浩晃, 勝俣 啓, 大園 真子, 橋本 武志, 青山 裕, 酒井 慎一, 松本 聡, 岡田 知己, 小菅 正裕, 寺川 寿子, 飯尾 能久, 中尾 茂, 上嶋 誠, 柴田 智郎, 大津 直, 高井 伸雄, 飯場 正紀, 渡部 要一, 菊地 優, 岡崎 太一郎, 白井 和貴, 西村 裕一, 石川 達也, 高瀬 裕也, 永井 宏, 宮森 保紀, 三宅 弘恵, 松島 信一, 浅野 公之, 重藤 迪子, 卜部 厚志, 前田 宜浩, 石澤 友浩, 廣瀬 亘, 小山内 信智, 山田 孝, 笠井 美青, 檜垣 大助, 風間 基樹, 千木良 雅弘, 渦岡 良介, 竹林 洋史, 木村 誇, 石丸 聡, 岡田 成幸, 内田 賢悦, 有村 幹治, 植松 武是, 多々納 裕一, 梶谷 義雄, 能島 暢呂, 田村 圭子, 中村 洋光, 戸松 誠
    平成30年北海道胆振東部地震とその災害に関する総合調査を実施した。大きな人的被害を出した厚真町の同時多発斜面崩壊では、周辺火山の噴火により厚く堆積した火砕降下物の底面に粘土化したすべり面が確認された。震源近くでは距離減衰式より大きな速度加速度が観測され、むかわ町の建物被害は地盤構造による地震動の増幅が影響しいる可能性が示された。札幌市内の住宅地で発生した液状化は、密度の小さな火山灰での谷埋め盛土と高い地下水位が関与している可能性が示された。道内全域停電が社会インフラや社会経済活動に与えた実態が明らかにされた。住民も対象とした成果報告会を開催し研究成果の社会還元を行った。
    日本学術振興会, 特別研究促進費, 北海道大学, 18K19952
  • 高摩擦すべり支承の熱・力学連成挙動解析システムの開発
    研究助成
    2017年10月 - 2019年03月
    菊地 優
    大成学術財団, 研究代表者, 競争的資金
  • 巨大地震に対するRCパッシブ制振建物-地盤連成系の非線形最適制御設計法の開発               
    科学研究費補助金(基盤研究(C))
    2016年04月 - 2019年03月
    白井和貴
    文部科学省, 競争的資金
  • 廃タイヤ活用による構造物高耐震化システムの開発               
    科学研究費補助金(挑戦的萌芽研究)
    2016年04月 - 2019年03月
    菊地 優
    文部科学省, 研究代表者, 競争的資金
  • 過大地震入力に対する免震構造の極限性能向上技術の開発
    科学研究費補助金(基盤研究(A))
    2015年04月 - 2018年03月
    菊地 優
    文部科学省, 研究代表者, 競争的資金
  • OpenSeesを用いた免震構造極限挙動解析システムの構築               
    免震構造・制振構造に関わる研究助成
    2014年04月 - 2015年03月
    菊地 優
    日本免震構造協会, 研究代表者, 競争的資金
  • 風応答長期観測記録に基づく塔状構造物の動特性変動の定量化               
    科学研究費補助金(挑戦的萌芽研究)
    2011年04月 - 2014年03月
    菊地 優
    文部科学省, 研究代表者, 競争的資金
  • 多次元入力地震動に対する免震建物の地震応答評価手法の開発
    科学研究費補助金(基盤研究(B))
    2011年04月 - 2014年03月
    菊地 優
    文部科学省, 研究代表者, 競争的資金
  • 免震部材の多軸連成力学モデルの開発               
    免震構造・制振構造に関わる研究助成
    2011年04月 - 2012年03月
    菊地 優
    日本免震構造協会, 研究代表者, 競争的資金
  • 原子力施設用配管の耐震裕度評価法と耐震性向上技術に関する開発               
    革新的実用原子力技術開発費補助事業
    2008年04月 - 2011年03月
    中村 孝
    経済産業省, 競争的資金
  • 免震建物の終局挙動評価技術の高度化と合理的設計法への展開
    科学研究費補助金(基盤研究(B))
    2008年04月 - 2011年03月
    菊地 優
    文部科学省, 研究代表者, 競争的資金
  • シナリオ地震による都市直下型地震の強震動予測に基づく既存建築物の耐震性能の評価               
    科学研究費補助金(基盤研究(C))
    2006年04月 - 2008年03月
    菊地 優
    文部科学省, 研究代表者, 競争的資金
  • 北海道の地震環境に基づく歴史的建造物の戦略的保存再生法に関する研究               
    科学研究費補助金(基盤研究(C))
    2004年04月 - 2006年03月
    菊地 優
    文部科学省, 研究代表者, 競争的資金

産業財産権

  • ペデスタルデッキ、及びペデスタルデッキの構築方法               
    特許権, 菊地優, 福喜多 輝, 猿田正明
    特開2004-52275, 2004年02月
  • 3次元免震装置               
    特許権, 櫻井衛, 須原淳二, 太田和也, 岡田康男, 田村和夫, 猿田正明, 菊地優
    特開2002-188688, 2002年07月
  • 免震装置の取付構造               
    特許権, 菊地優, 北村佳久, 斎藤豊
    特開2000-080819, 2000年03月

担当教育組織