Researcher Profile and Settings

Master

Affiliation (Master)

• Faculty of Engineering　Division of Architecture　Research Group of Structural Engineering and Materials

Affiliation (Master)

• Faculty of Engineering　Division of Architecture　Research Group of Structural Engineering and Materials

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Profile and Settings

Profile and Settings

• Name (Japanese)

  Ishii

• Name (Kana)

  Ken

• Name

  201901017260149585

Achievement

Research Interests

• Structural Engineering   Seismic Isolation   

Research Areas

• Social infrastructure (civil Engineering, architecture, disaster prevention) / Building structures and materials / Seismic Isolation

Published Papers

• 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 1340-4202 2024/07/01 [Refereed]
  
• 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 1340-4202 2024/02/01 [Refereed]
  
• 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 1340-4202 2023/12/01 [Refereed]
  
• 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 1545-2255 2023/03/23 [Refereed]
   

  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 1340-4202 2023/03/01 [Refereed]
  
• 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 1340-4202 2022/12/01 [Refereed]
  
• 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 0910-8033 2022/04 [Refereed]
  
• Displacement control system for seismic isolation equipped with hardening and rotating inertia mass elements

  Jun Iba, Koichi Watanabe, Ken Ishii, Masaru Kikuchi

  Journal of Structural Engineering 67B 539 - 548 2021/03 [Refereed][Not invited]
  
• 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 2019/09 [Refereed][Not invited]
  
• Earthquake response analysis of historic reinforced temple Ohtaniha Hakodate Betsuin after seismic retrofitting with friction dampers

  Kazutaka Shirai, Masaru Kikuchi, Tomoaki Ito, Ken Ishii

  International Journal of Architectural Heritage 13 (1) 47 - 57 2019/01 [Refereed][Not invited]
  
• Improved numerical analysis for ultimate behavior of elastomeric seismic isolation bearings

  Ken Ishii, Masaru Kikuchi

  Earthquake Engineering and Structural Dynamics 48 (1) 65 - 77 0098-8847 2019/01 [Refereed][Not invited]
  
• A new evaluation method for yielding force of lead rubber bearings under cyclic loading

  WAKE Tomotaka, KIKUCHI Masaru, ISHII Ken, KUROSHIMA Yohei, NAKAMURA Takahito

  Journal of Structural and Construction Engineering (Transactions of AIJ) 日本建築学会 83 (750) 1105 - 1115 1340-4202 2018/08 [Refereed][Not invited]
  
• 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 日本建築学会 24 (56) 201 - 206 1881-8188 2018/02/01 [Refereed][Not invited]
   

  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.
• Analytical Study on the Seismic Retrofitting of a Historic Reinforced Concrete Temple Using Friction Dampers

  Kazutaka SHIRAI, Masaru KIKUCHI, Tomoaki Ito, Ken Ishii

  3rd International Conference on PROTECTION OF HISTORICAL CONSTRUCTIONS (PROHITECH17) 159 1 - 8 2017/07 [Refereed][Not invited]
  
• 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 0098-8847 2017/04 [Refereed][Not invited]
   

  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.
• Seismic response analysis of isolated buildings in consideration of the thermal and mechanical coupling behavior of lead rubber bearings

  KUROSHIMA Yohei, ISHII Ken, KIKUCHI Masaru, IIBA Masanori, SHIRAI Kazutaka

  Journal of Structural Engineering. B 日本建築学会 63B 231 - 240 2017/03 [Refereed][Not invited]
  
• A mechanical model for the triaxial behavior of high-damping rubber bearings

  Masaru Kikuchi, Hideaki Kato, Masashi Yamamoto, Ken Ishii, Kazutaka Shirai

  Journal of Structural and Construction Engineering 日本建築学会 80 (713) 1067 - 1077 1881-8153 2015 [Refereed][Not invited]
   

  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.
• Horizontal bidirectional characteristics of elastic sliding bearings under various fluctuant vertical loading conditions

  Naoto Kamoshita, Masashi Yamamoto, Shigeo Minewaki, Masaru Kikuchi, Ken Ishii, Osamu Kouchiyama, Takahito Nakamura

  Journal of Structural and Construction Engineering 日本建築学会 79 (698) 453 - 461 1881-8153 2014 [Refereed][Not invited]
   

  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.
• Horizontal bidirectional hysteresis properties of lowmodulus high-damping rubber bearings

  Masaru Kikuchi, Masashi Yamamoto, Ken Ishii, Yoritaka Sasaki

  Journal of Structural and Construction Engineering 日本建築学会 79 (696) 257 - 265 1881-8153 2014 [Refereed][Not invited]
   

  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.
• Ultimate behavior of lead rubber bearings under horizontal Bi-directional deformation

  Takahito Nakamura, Masaru Kikuchi, Ken Ishii, Osamu Kouchiyama

  AIJ Journal of Technology and Design 日本建築学会 19 (42) 471 - 476 1341-9463 2013/06 [Refereed][Not invited]
   

  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.
• Mechanical behavior analysis of multilayered elastomeric bearings under combined stress

  Ken Ishii

  Hokkaido University 2013/03 [Not refereed][Not invited]
  
• Hysteresis properties of lead rubber bearings under horizontal Bi-directional deformation

  Takahito Nakamura, Masaru Kikuchi, Ken Ishii, Osamu Kouchiyama

  Journal of Structural and Construction Engineering 日本建築学会 77 (681) 1663 - 1671 1340-4202 2012/11 [Refereed][Not invited]
   

  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.
• A hysteresis model of high-damping rubber bearings using an integral type deformation history constitutive law

  Hideaki Kato, Takahiro Mori, Nobuo Murota, Ken Ishii, Masaru Kikuchi

  Journal of Structural and Construction Engineering 日本建築学会 76 (667) 1721 - 1728 1340-4202 2011/09 [Refereed][Not invited]
   

  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.
• Compression and bending moduli distributions for multilayered elastomeric bearings

  ISHII Ken, KIKUCHI Masaru

  Journal of Structural and Construction Engineering (Transactions of AIJ) 日本建築学会 76 (666) 1425 - 1431 1340-4202 2011/08 [Refereed][Not invited]
  
• Prediction of high-damping rubber isolation bearing behavior under large shear deformations and severe axial loads

  KIKUCHI Masaru, ISHII Ken, KATO Hideaki

  Journal of Structural Engineering. B 日本建築学会 56B 179 - 188 0910-8033 2010/03 [Refereed][Not invited]
   

  The paper describes an analytical method for predicting the behavior of high-damping rubber isolation bearings under large shear deformations and severe axial loads. Dynamic loading tests are performed to investigate the effect of aspect ratio and axial load on bearing behavior. The test results show that the behavior of low shape factor bearing is strongly influenced by axial load, especially for large shear deformation. New hysteresis models for shear and axial components are developed from the test results. The influence of aspect ratio and axial load on bearing behavior is also represented by the developed analytical method.
• 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 [Refereed][Not invited]
  
• A new analytical model for seismic isolation bearings subject to eccentric bending moments and shear deformation

  Ken Ishii, Masaru Kikuchi, Yoshihisa Kitamura, Takahito Nakamura

  Journal of Structural and Construction Engineering 日本建築学会 75 (647) 87 - 93 1881-8153 2010 [Refereed][Not invited]
   

  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.

MISC

• 21211 Development of seismically isolated structure analysis system using OpenSees : Part1: Outline of OpenSees

  ISHII Ken, KIKUCHI Masaru, TSUNEZAWA Ippei, SHIRAI Kazutaka, YAMAMOTO Masashi, KONDO Akihiro  Summaries of technical papers of annual meeting  2015-  421  -422  2015/09/04
• 21212 Development of seismically isolated structure analysis system using OpenSees : Part2 : Development of an Element Model

  TSUNEZAWA Ippei, KIKUCHI Masaru, ISHII Ken, SHIRAI Kazutaka, YAMAMOTO Masashi, KONDO Akihiro  Summaries of technical papers of annual meeting  2015-  423  -424  2015/09/04
• 21216 An Analytical Model for Super Low Modulus High Damping Rubber Bearings under Large Shear Deformations

  UCHIDA Mari, KIKUCHI Masaru, ISHII Ken, KATO Hideaki, NAKAMURA Masahiro, MUROTA Nobuo  Summaries of technical papers of annual meeting  2015-  431  -432  2015/09/04
• 21287 Robustness Evaluation for Variation of Uncertain Structural Characteristics of Isolating Devices by Seismic Response Analysis : Part3: Seismically Isolated Buildings with Hysteretic Dampers

  Hayakawa Yohei, Ishii Ken, Kikuchi Masaru, Shirai Kazutaka, Tanimoto Kazuki  Summaries of technical papers of annual meeting  2014-  573  -574  2014/09/12
• 21341 Optimum Damping Characteristic Evaluation of Vibration Control System with Hysteretic Damper in Consideration of Soil-Structure Interaction

  KOYA Tomonori, SHIRAI Kazutaka, FUJIMORI Takeshi, ISHII Ken, KIKUCHI Masaru  Summaries of technical papers of annual meeting  2014-  681  -682  2014/09/12
• 21227 Study on Two Horizontal Hysteresis Model of High-damping Rubber Bearings Considered Torsional Deflection : Part 1: Result of Bi-axial Test

  TSUNEZAWA Ippei, UHARA Masaki, ISHII Ken, KIKUCHI Masaru, YAMAMOTO Masashi, SASAKI Yoritaka  Summaries of technical papers of annual meeting  2014-  (0)  453  -454  2014/09/12  [Not refereed][Not invited]
  
• 21228 Study on Two Horizontal Hysteresis Model of High-damping Rubber Bearings Considered Torsional Deflection : Part 2: A Hysteresis Model

  UHARA Masaki, TSUNEZAWA Ippei, ISHII Ken, KIKUCHI Masaru, YAMAMOTO Masashi, SASAKI Yoritaka  Summaries of technical papers of annual meeting  2014-  (0)  455  -456  2014/09/12  [Not refereed][Not invited]
  
• 21190 An Analytical Model for Low Modulus High Damping Rubber Bearings under Large Shear Deformations

  KATO Hideaki, KIKUCHI Masaru, ISHII Ken, UHARA Masaki  Summaries of technical papers of annual meeting  2013-  379  -380  2013/08/30
• 21178 Mechanical Properties of Lead Rubber Bearing Under Horizontal Bi-directional Deformation : Part 2 Hysteresis Properties

  NAGAHIRO Kenta, KIKUCHI Masaru, NAKAMURA Takahito, ISHII Ken, KOUCHIYAMA Osamu  Summaries of technical papers of annual meeting  2013-  355  -356  2013/08/30
• 21179 Mechanical Properties of Lead Rubber Bearing Under Horizontal Bi-directional Deformation ] Part 3 Ultimate Behavior

  NAKAMURA Takahito, KIKUCHI Masaru, KOUCHIYAMA Osamu, ISHII Ken, NAGAHIRO Kenta  Summaries of technical papers of annual meeting  2013-  357  -358  2013/08/30
• 21177 Mechanical Properties of Lead Rubber Bearing Under Horizontal Bi-directional Deformation : Part 1 Outline of Experimental Study

  KOUCHIYAMA Osamu, KIKUCHI Masaru, NAKAMURA Takahito, ISHII Ken, NAGAHIRO Kenta  Summaries of technical papers of annual meeting  2013-  353  -354  2013/08/30
• 21272 Robustness Evaluation for Variation of Uncertain Structural Characteristics of Isolating Devices by Seismic Response Analysis : Part1: Contour Map of the Maximum Seismic Response

  Ishii Ken, Tanimoto Kazuki, Shirai Kazutaka, Hayakawa Yohei, Kikuchi Masaru  Summaries of technical papers of annual meeting  2013-  543  -544  2013/08/30
• 21273 Robustness Evaluation for Variation of Uncertain Structural Characteristics of Isolating Devices by Seismic Response Analysis : Part2: Quantitative Evaluation of Robustness

  Hayakawa Yohei, Tanimoto Kazuki, Shirai Kazutaka, Ishii Ken, Kikuchi Masaru  Summaries of technical papers of annual meeting  2013-  545  -546  2013/08/30
• 21180 An Analytical Model of Lead-Rubber Bearings under Two Horizontal Direction Loading

  Kimura Hirotaka, Matsuhashi Yuto, Kikuchi Masaru, Ishii Ken, Yamamoto Masashi  Summaries of technical papers of annual meeting  2013-  (0)  359  -360  2013/08/30  [Not refereed][Not invited]
  
• 21404 Experimental Study on Horizontal Bi-axial mechanical properties of Sliding Supports with Rubber-pad : Part 4:Method of Tests and Result of Uni-axial Test

  KAMOSHITA Naoto, MINEWAKI Shigeo, YAMAMOTO Masashi, KIKUCHI Masaru, ISHII Ken, NAKAMURA Takahito, KOUCHIYAMA Osamu  Summaries of technical papers of annual meeting  2013-  (0)  807  -808  2013/08/30  [Not refereed][Not invited]
  
• 21405 Experimental Study on Horizontal Bi-axial mechanical properties of Sliding Supports with Rubber-pad : Part 5: Results of Bi-axial Test and Interval Test

  MINEWAKI Shigeo, KAMOSHITA Naoto, YAMAMOTO Masashi, KIKUCHI Masaru, ISHII Ken, NAKAMURA Takahito, KOUCHIYAMA Osamu  Summaries of technical papers of annual meeting  2013-  (0)  809  -810  2013/08/30  [Not refereed][Not invited]
  
• 21406 Experimental Study on Horizontal Bi-axial Mechanical Properties of Sliding Supports with Rubber-pad : Part 6: Simulation Analysis for Varying Axial Load

  KIKUCHI Masaru, ISHII Ken, YAMAMOTO Masashi, MINEWAKI Shigeo, KAMOSHITA Naoto, NAKAMURA Takahito, KOUCHIYAMA Osamu  Summaries of technical papers of annual meeting  2013-  (0)  811  -812  2013/08/30  [Not refereed][Not invited]
  
• Robustness Evaluation of Seismically Isolated Buildings During Earthquakes Considering Variation of Structural Parameters of Isolating Devices

  Hayakawa Yohei  日本建築学会北海道支部研究報告集  (86)  105  -108  2013/06/29
• Evaluation of Long-term Variation of Dynamic Characteristics of a Tall Reinforced Concrete Tower

  Kikuchi Masaru  日本建築学会北海道支部研究報告集  (86)  61  -64  2013/06/29
• Seismic Response Characteristics of Isolation Buildings with Multilayered Elastomeric Bearings Considering Rocking Behavior

  ISHII Ken  日本建築学会北海道支部研究報告集  (86)  81  -84  2013/06/29
• Analysis of the Behavior of Lead-Rubber Bearings under Two Horizontal Directional Loading

  Kimura Hirotaka  日本建築学会北海道支部研究報告集  (86)  161  -164  2013/06/29  [Not refereed][Not invited]
  
• 21153 Analysis of the Behavior of High-damping Rubber Bearings under Two Horizontal Shear Deformations and Severe Axial Loads

  FUJIWARA Mizuho, KIKUCHI Masaru, ISHII Ken, KATO Hideaki  Summaries of technical papers of annual meeting  2012-  305  -306  2012/09/12
• 21232 Seismic Response of Seismically Isolated Buildings Designed by U.S. Seismic Design Code Using Response Modification Factor

  Tanimoto Kazuki, Kitayama Shoma, Ishii Ken, Shirai Kazutaka, Kikuchi Masaru  Summaries of technical papers of annual meeting  2012-  463  -464  2012/09/12
• 弾性すべり支承の水平二方向特性に関する実験的研究(その3:シミュレーション解析)

  菊地優, 石井建, 山本雅史, 嶺脇重雄, 鴨下直登, 仲村崇仁, 河内山修  日本建築学会大会学術講演梗概集・建築デザイン発表梗概集(CD−ROM)  2012-  ROMBUNNO.21160  2012/07/20  [Not refereed][Not invited]
  
• 弾性すべり支承の水平二方向特性に関する実験的研究(その1:実験概要)

  仲村崇仁, 河内山修, 菊地優, 石井建, 山本雅史, 嶺脇重雄, 鴨下直登  日本建築学会大会学術講演梗概集・建築デザイン発表梗概集(CD−ROM)  2012-  ROMBUNNO.21158  2012/07/20  [Not refereed][Not invited]
  
• 弾性すべり支承の水平二方向特性に関する実験的研究(その2:実験結果)

  鴨下直登, 山本雅史, 嶺脇重雄, 菊地優, 石井建, 仲村崇仁, 河内山修  日本建築学会大会学術講演梗概集・建築デザイン発表梗概集(CD−ROM)  2012-  ROMBUNNO.21159  2012/07/20  [Not refereed][Not invited]
  
• 位相差変位入力を用いた免震積層ゴム水平二方向加力試験方法について

  石井建, 菊地優, 山本雅史  日本建築学会大会学術講演梗概集・建築デザイン発表梗概集(CD−ROM)  2012-  ROMBUNNO.21183  2012/07/20  [Not refereed][Not invited]
  
• 014 Analysis of the Behavior of High-damping Rubber Bearings under Severe Axial Load and Two Horizontal Shear Deformations

  Matsuhashi Yuto  日本建築学会北海道支部研究報告集  (85)  55  -58  2012/06/30
• 023 Horizontal Bi-directional Loading Programs of Elastomeric Seismic Isolation Bearings Using Sinusoidal Displacement Input with Phase Shift

  ISHII Ken  日本建築学会北海道支部研究報告集  (85)  95  -98  2012/06/30  [Not refereed][Not invited]
  
• 21253 Mechanical Properties of Lead Rubber Bearings under Biaxial Loading : Part 1: Biaxial Loading Tests

  Nakamura Takahito, Kikuchi Masaru, Ishii Ken, Suzuki Yoriko  Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-2, Structures II, Structural dynamics nuclear power plants  2011-  505  -506  2011/07/20
• 21262 An Analytical Model for Seismic Isolation Bearings under Large Shear Deformations Including the Influence of Compressive Modulus Distribution : Part I:Compressive Modulus Distribution on Rubber Layer

  Ishii Ken, Kitayama Shoma, Kikuchi Masaru  Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-2, Structures II, Structural dynamics nuclear power plants  2011-  523  -524  2011/07/20
• 21254 Mechanical Properties of Lead Rubber Bearings under Biaxial Loading : Part 2: Analyses Using 3-D Multiple Spring Model

  Kikuchi Masaru, Ishii Ken, Suzuki Yoriko, Nakamura Takahito  Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-2, Structures II, Structural dynamics nuclear power plants  2011-  507  -508  2011/07/20
• 039 Analysis for the Behavior of Full-scale Lead Rubber Bearings under Severe Condition Including the Influence of Compression Modulus Distribution

  KIKUCHl Masaru  日本建築学会北海道支部研究報告集  (84)  165  -168  2011/07/02
• 040 Compressive Modulus Distribution for Multilayerd Elastomeric Bearings

  Ishii Ken  日本建築学会北海道支部研究報告集  (84)  169  -172  2011/07/02
• 21263 An Analytical Model for Seismic Isolation Bearings under Large Shear Deformations Including the Influence of Compressive Modulus Distribution : Part II:Behavior Analysis of Lead-rubber Bearings

  Kitayama Shoma, Ishii Ken, Kikuchi Masaru  Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-2, Structures II, Structural dynamics nuclear power plants  525  -526  2011
• 21125 Bi-axial Horizontal Response for the Seismically-isolated Building with High-damping Rubber Isolation Bearings : Part 1: Mechanical Models for High-damping Rubber Isolation Bearings

  KIKUCHI Masaru, ISHII Ken, YAMAMOTO Masashi, YONEDA Harumi, MINEWAKI Shigeo, KATO Hideaki  Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-2, Structures II, Structural dynamics nuclear power plants  2010-  249  -250  2010/07/20  [Not refereed][Not invited]
  
• 21126 Bi-axial Horizontal Response for the Seismically-isolated Building with High-damping Rubber Isolation Bearings : Part 2: Seismic Response Analysis Model

  YONEDA Harumi, YAMAMOTO Masashi, MINEWAKI Shigeo, ISHII Ken, KIKUCHI Masaru, KATO Hideaki  Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-2, Structures II, Structural dynamics nuclear power plants  2010-  251  -252  2010/07/20  [Not refereed][Not invited]
  
• 21127 Bi-axial Horizontal Response for the Seismically-isolated Building with High-damping Rubber Isolation Bearings : Part 3: Seismic Response Analysis Results

  ISHII Ken, KIKUCHI Masaru, YAMAMOTO Masashi, YONEDA Harumi, MINEWAKI Shigeo, KATO Hideaki  Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-2, Structures II, Structural dynamics nuclear power plants  2010-  253  -254  2010/07/20  [Not refereed][Not invited]
  
• 049 An Analytical Model for Lead-rubber Bearings under Large Shear Deformations Including the Influence of Compression Modulus Distribution

  KITAYAMA Shoma  日本建築学会北海道支部研究報告集  (83)  193  -196  2010/07/03
• 048 Bi-axial Horizontal Response for the Seismic-isolated Building with High-damping Rubber Isolation Bearings

  ISHII Ken, 菊地 優, 山本 雅史, 米田 春美, 嶺脇 重雄, 加藤 秀章  日本建築学会北海道支部研究報告集  (83)  189  -192  2010/07/03  [Not refereed][Not invited]
  
• 21424 A Three-layer Multi-spring Model for Rubber Bearings under Eccentric Bending

  ISHII Ken, KIKUCHI Masaru, KITAMURA Yoshihisa, NAKAMURA Takahito  Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-2, Structures II, Structural dynamics nuclear power plants  2009-  847  -848  2009/07/20
• 010 A Three-layer Multi-spring Model for Rubber Bearings under Eccentric Bending

  ISHII Ken  日本建築学会北海道支部研究報告集  (82)  37  -40  2009/07
• 21186 Mechanical characteristic of rubber bearing with angled flange plates : (Part 1) Outline of experiments for rotational property

  KITAMURA Yoshihisa, SARUTA Masaaki, NISHIMURA Takuya, ISHII Ken, KIKUCHI Masaru  Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-2, Structures II, Structural dynamics nuclear power plants  2008-  371  -372  2008/07/20
• 21187 Mechanical Characteristic of Rubber Bearing with Angled Flange Plates : (Part 2) Results of Experiments for Rotational Property

  ISHII Ken, KIKUCHI Masaru, SARUTA Masaaki, NISHIMURA Takuya, KITAMURA Yoshihisa  Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-2, Structures II, Structural dynamics nuclear power plants  2008-  373  -374  2008/07/20
• 018 Mechanical properties evaluation using discrete multi-spring model for seismic isolation bearings

  ISHII ken  日本建築学会北海道支部研究報告集  (81)  69  -72  2008/06/28

Presentations

• Mechanical behavior of sliding bearings for seismic isolation under cyclic loading  [Not invited]

  Ken Ishii, Masaru Kikuchi

  16th World Conference on Seismic Isolation, Energy Dissipation and Regulation of Dynamic Characteristics of Structures, Saint-Petersburg, Russia  2019/07
• New Evaluation Formulae for Shear Strength of Lead-Rubber Bearings  [Not invited]

  Wake Tomotaka, Masaru Kikuchi, Ken Ishii

  16th World Conference on Seismic Isolation, Energy Dissipation and Regulation of Dynamic Characteristics of Structures, Saint-Petersburg, Russia  2019/07
• Effective Seismic Input Rates for Exsiting Buildings Considering Soil-Structure Interaction  [Not invited]

  Ken Ishii, Masaru Kikuchi, Jun Yoshida

  Proceedings of the 7th Structural Engineers World Congress 2019, Istanbul, Turkey  2019/04
• An Advanced Hysteresis Model of High-Damping Rubber Bearings for Seismic Isolation  [Not invited]

  Masaru Kikuchi, Ken Ishii

  Proceedings of the 7th Structural Engineers World Congress 2019, Istanbul, Turkey  2019/04
• Thermal-mechanical coupled behavior of sliding bearings for seismic isolation  [Not invited]

  M. Kikuchi, K. Ishii

  NME 2018  2018/08  Ghent, Belgium
• Thermal-Mechanical Coupled Behavior of Sliding Bearings for Seismic Isolation  [Not invited]

  Masaru Kikuchi, Ken Ishii

  1st International Conference on Numerical Modelling in Engineering, Ghent, Belgium  2018/08
• Thermal-mechanical coupled behavior of elastomeric isolation bearings under cyclic loadings  [Not invited]

  M. Kikuchi, K. Ishii

  16ECEE  2018/07  Thessaloniki, Greece
• Thermal-Mechanical Coupled Behavior of Elastomeric Isolation Bearings Under Cyclic Loading  [Not invited]

  Masaru Kikuchi, Ken Ishii

  16th European Conference on Earthquake Engineering, Thessaloniki, Greece  2018/06
• Analytical study on the seismic retrofitting of a historic reinforced concrete temple using friction dampers  [Not invited]

  K. Shirai, M. Kikuchi, T. Ito, K. Ishii

  PROHITECH´17  2017/07  Lisbon, Portugal
• Seismic response analysis considering the thermal-mechanical coupled behavior of lead rubber bearings  [Not invited]

  K. Ishii, M. Kikuchi, Y. Kuroshima

  EMI 2017  2017/07  San Diego, USA
• Numerical model for low-shear modulus high-damping rubber isolation bearing under large shear deformation  [Not invited]

  M. Kikuchi, K. Ishii, H. Kato, M. Nakamura

  EMI 2017  2017/07  San Diego, USA
• Horizontal biaxial loading tests on sliding lead rubber bearing system  [Not invited]

  M. Yamamoto, H. Hamaguchi, M. Kikuchi, K. Ishii, T. Wake

  NZSEE 2017  2017/04  Wellington, New Zealand
• Strength degradation in lead-rubber bearings during a long-duration earthquake  [Not invited]

  T. Wake, M. Kikuchi, K. Ishii

  NZSEE 2017  2017/04  Wellington, New Zealand
• Strength Degradation on Lead-Rubber Bearings during a Long-duration Earthquake  [Not invited]

  T. Wake, M. Kikuchi, K. Ishii

  2017 NZSEE Conference  2017
• Horizontal Biaxial Loading Tests on Sliding Lead Rubber Bearing System  [Not invited]

  M. Yamamoto, H. Hamaguchi, N. Kamoshita, M. Kikuchi, K. Ishii, T. Wake

  2017 NZSEE Conference  2017
• Evaluation of long-term variation of dynamic properties of a tall reinforced concrete tower with tuned liquid dampers  [Not invited]

  K. Ishii, M. Kikuchi

  HKICEAS 2013  2013/12  Hong Kong, China
• Three-dimensional mechanical model for circular multilayered elastomeric bearings considering compression modulus distribution on the rubber pad  [Not invited]

  K. Ishii, M. Kikuchi

  13WCSI  2013/09  Sendai, Japan
• Structural characteristics of a historical reinforced concrete temple building, Higashi-Honganji Hakodate Betsuin  [Not invited]

  K. Ishii, M. Kikuchi, K. Shirai

  EASEC-13  2013/09  Sapporo, Japan
• Three-dimensional Mechanical Model for Circular Multilayered Elastomeric Bearings Considering Compression Modulus Distribution on the Rubber Pad  [Not invited]

  Ken Ishii, Masaru Kikuchi, Yoriko Suzuki

  13th World Conference on Seismic Isolation, Energy Dissipation and Active Vibration Control of Structures, Sendai, Japan  2013/09
• Structural Characteristics of a Historical Reinforced Concrete Temple Building, Higashi-Honganji Hakodate Betsuin  [Not invited]

  Ken ISHII, Masaru KIKUCHI, Kazutaka SHIRAI

  13th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-13)  2013/09
• Behavior of sliding rubber bearings under horizontal bidirectional loadings  [Not invited]

  M. Yamamoto, S. Minewaki, N. Kamoshita, M. Kikuchi, K. Ishii, O. Kouchiyama, T. Namamura

  15WCEE  2012/09  Lisbon, Portugal
• Seismic response analysis of seismically isolated buildings with multilayered elastomeric bearings considering rocking behavior  [Not invited]

  K. Ishii, M. Kikuchi, K. Shirai

  15WCEE  2012/09  Lisbon, Portugal
• Response modification factor for the design of seismically isolated buildings  [Not invited]

  S. Kitayama, K. Ishii, M. Kikuchi

  15WCEE  2012/09  Lisbon, Portugal
• Dynamic properties of a tall reinforced concrete tower with tuned liquid dampers  [Not invited]

  M. Kikuchi, K. Ishii, Y. Suzuki

  ACEM'12  2012/08  Seoul, Korea
• Dynamic Properties of a Tall Reinforced Concrete Tower with Tuned Liquid Dampers  [Not invited]

  Ken Ishii, Masaru Kikuchi, Yoriko Suzuki

  The 2012 World Congress on Advances in Civil, Environmental, and Materials Research, Seoul, Korea  2012/08
• Response Modification Factor for the Design of Seismically Isolated Buildings  [Not invited]

  S. Kitayama, K. Ishii, M. Kikuchi

  Proceeding of the 15th World Conference on Earthquake Engineering  2012
• Behavior of Sliding Rubber Bearings under Horizonal Bidirectional Loadings  [Not invited]

  M. Yamamoto, S. Minewaki, N. Kamoshita, M. Kikuchi, K. Ishii, O. Kouchiyama, T. Nakamura

  Proceeding of the 15th World Conference on Earthquake Engineering  2012
• Seismic Response Analysis of Seismically Isolated Buildings with Multilayered Elastomeric Bearings Considering Rocking Behavior  [Not invited]

  Ken ISHII, Masaru KIKUCHI, Kazutaka SHIRAI

  Proceedings of the 15th World Conference on Earthquake Engineering (15WCEE)  2012
• Biaxial horizontal response for a seismically-isolated building with high-damping rubber bearings  [Not invited]

  M. Yamamoto, M. Kikuchi, K. Ishii, H. Yoneda, S. Minewaki, H. Kato

  12WCSI  2011/09  Sochi, Russia
• Three dimensional analysis for square seismic isolation bearings under large shear deformation and high axial loads  [Not invited]

  M. Kikuchi, K. Ishii, T. Nakamura, I. Aiken

  5th ICEE  2010/03  Tokyo, Japan

Association Memberships

• ARCHITECTURAL INSTITUTE OF JAPAN   

Research Projects

• Development of next-generation high-performance seismic isolation system to prepare for earthquake ground motions with various properties

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2019/04 -2022/03 

  Author : Kikuchi Masaru

   

  In this work, we proposed a seismic isolation system that harnesses cutting-edge seismic isolation technology to form an effective structural system for earthquake disaster prevention. Our aim is to create a seismic isolation structure that is sufficiently robust to a variety of ground motions, such as long-period motions caused by mega subduction earthquakes and large-amplitude pulse-like motions caused by inland earthquakes. We developed two high-performance isolation systems: a highly durable isolation system that can maintain operation even for large and repeated deformations, and a displacement-controlled isolation system that can reduce acceleration without exceeding the deformation limit even for large-amplitude seismic ground motions. The proposed systems will form a vital part of the next-generation structural systems for future earthquake disaster prevention.
• Analysis model for seismic sliding bearings considering various dependencies

  Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research

  Date (from‐to) : 2019/08 -2021/03 

  Author : Ishii Ken

   

  This research developed numerical models for seismic sliding bearings considering pressure-velocity-temperature dependencies. Mechanical model and thermal conductivity analysis model are separately produced, and are combined together in the numerical analysis. Using the developed model, thermal-mechanical coupled behavior analyses were performed. Effect of arrangements of sliding materials on temperature rise of the devices was evaluated by simulation analysis results.
• 複合応力状態における免震積層ゴムの終局挙動解析法に関する研究

  日本学術振興会：科学研究費助成事業

  Date (from‐to) : 2012 -2013 

  Author : 石井 建

   

  本研究では、複合応力下における免震積層ゴムの力学挙動解析法を開発した。これは、免震建物の水平二方向応答特性や大変形時の軸力変動によって生じる免震積層ゴムの座屈特性の変化などを精緻に再現することで、多方向から地震入力を受ける免震建物の応答特性をより正確に把握しようとするものである。本年度は、主として下記の3点について取り組んだ。 1 免震装置のモデル化 鉛プラグ入り積層ゴムについて、丸型ゴムを対象とした定式化を用いて、高軸力が作用した際の大変形時座屈特性を良好に表現する力学モデルを作成した。また、定式化において適用可能な近似式を示した。弾性滑り支承について、軸力と水平二方向復元力の連成効果に面圧依存性を取り入れた力学モデルを作成した。高減衰積層ゴムについて、水平二方向加力時に生じるねじれ変形の影響を考慮した力学モデルを作成した。これらを用いて、静的加力実験のシミュレーション解析や地震応答解析を行った。 2 免震建物の地震応答解析 免震建物の数値計算モデルを作成して地震応答解析を行い、建物のロッキング挙動が生じた場合や免震層の構造パラメータが変動した場合の応答値の変動について検証した。積層ゴムを用いた免震建物では、ロッキング挙動下での地震応答において、過度の座屈現象の進展が回避されるという応答特性を持つことを示した。また、免震部材の不確定パラメータを考慮したうえで、免震建物のロバスト安定性を数値的に判断する手法を提案した。 3 計算プログラムのオープンソース化 免震積層ゴムの復元力モデルおよび力学モデルを、オープンソース形式で構造解析プログラムの開発を行っているOpen Sees (Open System for Earthquake Engineering Simulation)に提供した。計算プログラムはウェブ上で公開されており、誰でもダウンロードして使用することが可能である。