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Last Updated :2024/11/15

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

Affiliation

  • Hokkaido University, Faculty of Engineering, Division of Architectural and Structural Design
  • Hokkaido University, Center for Natural Hazards Research, Associate Professor

Profile and Settings

  • Name (Japanese)

    Tadayoshi

  • Name (Kana)

    Nakashima

  • Name

    201201037019084765

Affiliation

  • Hokkaido University, Faculty of Engineering, Division of Architectural and Structural Design
  • Hokkaido University, Center for Natural Hazards Research, Associate Professor

Achievement

Research Interests

  • 建築情報   都市防災   地震工学   

Research Areas

  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Building structures and materials
  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Safety engineering
  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Social systems engineering

Research Experience

  • 2012/04 - Today Hokkaido University Assistant Professor
  • 2009/04 - 2012/03 Tono Reserarch Institute of Earthquake Science Research Staff

Awards

  • 2013 日本自然災害学会 学術発表優秀賞
     地震による部屋別人体損傷度確率関数の提案 
    受賞者: 中嶋唯貴
  • 2010 地域安全学会 平成22年度地域安全学会論文賞
     コンピュータービジョンによるリアルタイム音声誘導システムの開発～地震時室内負傷低減のための多重対策の一環として～

Published Papers

  • 積雪寒冷地における建物被害に起因した低体温症要対処者推定
    飯田, 彬斗, 中嶋, 唯貴, 村山, 凜成
    日本建築学会構造系論文集 2025/02/01 [Refereed]
  • NAKASHIMA Tadayoshi, KOBAYASI Junpei, OZASA Takao
    『地域施設計画研究 42』 433 - 440 2024/07 [Refereed]
  • Akira ISHII, Tadayoshi NAKASHIMA
    Journal of Architecture and Planning (Transactions of AIJ) 89 (816) 320 - 329 1340-4210 2024/02/01 [Refereed]
  • Building Damage Assessment Using AI and Video from Vehicle-mounted Camera and Damage Rate Evaluation by Damage Map
    OSASA Kota, KATO Keisuke, TAKASE Yuya, NAKASHIMA Tadayoshi
    日本地震工学会論文集 2024 [Refereed]
  • 大笹航汰, 加藤圭祐, 高瀬裕也, 中嶋唯貴
    日本建築学会技術報告集(Web) 30 (74) 1881-8188 2024 [Refereed]
  • Akito Iida, Tadayoshi Nakashima, Shigeyuki Okada
    International Journal of Disaster Risk Reduction 103999 - 103999 2212-4209 2023/09 [Refereed]
  • NAKATA Kento, NAKASHIMA Tadayoshi, OZASA Takao
    地域施設計画研究(CD-ROM) 41 147 - 156 2023/07 [Refereed][Not invited]
  • Tsubasa OKAZE, Eriko TOMOKIYO, Hideki KIKUMOTO, Yoshihide TOMINAGA, Yingli XUAN, Kunio MIZUTANI, Tadayoshi NAKASHIMA, Kazuyoshi NISHIJIMA
    AIJ Journal of Technology and Design 28 (69) 1083 - 1088 1341-9463 2022/06/20 [Refereed]
  • Hikaru OKUBO, Tadayoshi NAKASHIMA, Shigeyuki OKADA
    地域安全学会論文集 37 1 - 9 2020/11 [Refereed][Not invited]
  • S. Hayakawa, T. Nakashima, S. Okada
    Proceeding of 17th World Conference on Earthquake Engineering, 17WCEE Sendai, Japan - 7b-0003-  2020/09 [Not refereed][Not invited]
  • Akane SHINODA, Shigeyuki OKADA, Tadayoshi NAKASHIMA
    Journal of Japan Association for Earthquake Engineering 20 (3) 3_51 - 3_69 2020 [Refereed][Not invited]
  • 松本将武, 岡田成幸, 中嶋唯貴, 田守伸一郎
    地域安全学会論文集(CD-ROM) 33 259‐266(J‐STAGE)  2019 [Refereed][Not invited]
  • 角田叡亮, 岡田成幸, 中嶋唯貴
    日本地震工学会論文集(Web) 19 (5) 5_423‐5_439(J‐STAGE)  1884-6246 2019 [Refereed][Not invited]
  • 中野秀洋, 岡田成幸, 中嶋唯貴
    日本地震工学シンポジウム論文集(CD-ROM) 15th ROMBUNNO.GO07‐01‐10  2018/11/16 [Not refereed][Not invited]
  • 西嘉山純一朗, 岡田成幸, 中嶋唯貴, 伊藤喜紀
    日本地震工学シンポジウム論文集(CD-ROM) 15th ROMBUNNO.GO06‐01‐04  2018/11/16 [Not refereed][Not invited]
  • 岡田成幸, 中嶋唯貴, 菊池俊一
    日本地震工学シンポジウム論文集(CD-ROM) 15th ROMBUNNO.GO06‐01‐09  2018/11/16 [Not refereed][Not invited]
  • 篠田茜, 岡田成幸, 中嶋唯貴
    日本地震工学シンポジウム論文集(CD-ROM) 15th ROMBUNNO.GO05‐01‐04  2018/11/16 [Not refereed][Not invited]
  • 角田叡亮, 岡田成幸, 中嶋唯貴
    日本地震工学シンポジウム論文集(CD-ROM) 15th ROMBUNNO.GO06‐01‐02  2018/11/16 [Not refereed][Not invited]
  • 佐伯琢磨, 西嶋一欽, 松島信一, 中嶋唯貴, 指田朝久
    日本地震工学シンポジウム論文集(CD-ROM) 15th ROMBUNNO.PS1‐01‐42  2018/11/16 [Not refereed][Not invited]
  • 谷川真衣, 岡田成幸, 中嶋唯貴
    日本地震工学シンポジウム論文集(CD-ROM) 15th ROMBUNNO.GO06‐01‐05  2018/11/16 [Not refereed][Not invited]
  • 大久保光, 岡田成幸, 中嶋唯貴
    日本地震工学シンポジウム論文集(CD-ROM) 15th ROMBUNNO.PS2‐02‐49  2018/11/16 [Not refereed][Not invited]
  • Nakashima Tadayoshi, Okada Shigeyuki
    SUSTAINABILITY 10 (9) 2071-1050 2018/09 [Refereed][Not invited]
  • TAKEUCHI Shinichi, OKADA Shigeyuki, NAKASHIMA Tadayoshi
    Journal of Structural and Construction Engineering (Transactions of AIJ) 日本建築学会 83 (753) 1549 - 1559 1340-4202 2018 [Refereed][Not invited]
     
    &nbsp;We must take measures to mitigate damages from large-scale earthquakes effectively and efficiently. It is important to determine the amount of damage reduction as a numerical target, select effective countermeasures through analysis of the damage factors, and intensively promote them. For estimating building damage in the effort to reduce loss and destruction, a damage index function was used; accordingly, a building was considered as a unit. For vulnerability function, area was a unit. To set disaster reduction targets according to region, a vulnerability function that strongly takes account of regionality and construction year is necessary. In this paper, the proposed methodology is the use of a vulnerability function incorporating regionality and construction year.<br>&nbsp;To construct the vulnerability function, an estimating method using past earthquake damage data was used. This method reflects the characteristics of the area where earthquake damage occurred. We constructed the regional damage rate function of wooden houses by considering the results of a regional seismic diagnosis based on the damage index function. With this method, it becomes possible to evaluate the earthquake resistance of buildings in the area by the probability density distribution of the seismic performance index. If there is a distribution of seismic performance indices for each area, it is possible to construct a highly accurate regional damage rate function without damage data from the region.<br>&nbsp;The following is shown as a method of constructing the regional damage rate function:<br>&nbsp;a) We estimated the new damage index function with diagnostic results obtained from utilizing the 2004 version of the seismic evaluation method for wooden buildings.<br>&nbsp;b) For construction year without diagnostic results, we proposed a method to estimate the seismic index distribution from the new damage index function and the damage rate of destructive earthquakes occurring close to the construction year.<br>&nbsp;c) If the area's seismic diagnostic results were small, we proposed estimating the seismic index distribution from Bayesian inference with the diagnostic results of Mokutaikyo as the prior distribution and the results in the area as the likelihood function.<br>&nbsp;d) From the above results, we estimated the seismic index distribution of wooden houses in Hokkaido. In houses built before 1950, the average of the scores of Hokkaido and Mokutaikyo (nationwide average) was almost the same. In houses built after 1960, the average for Hokkaido was 1.4 to 1.7 times that of Mokutaikyo. The standard deviation in the case of Hokkaido was larger than for Mokutaikyo, and diversity of seismic performance by various building construction methods was found.<br>&nbsp;e) From the new damage index function and the regional seismic performance index distribution of wooden houses, the regional damage rate function in Hokkaido was estimated.
  • Tadayoshi Nakashima, Shigeyuki Okada, Akane Shinoda
    Journal of Disaster Research 12 (6) 1151 - 1160 1883-8030 2017/12/01 [Refereed][Not invited]
     
    This paper discusses the reduction effect of a foreshock on casualties during the mainshock of people who evacuated to shelters and their private cars during the 2016 Kumamoto earthquake. In the first part of this paper, we discuss the number of human casualties caused by the collapse of wooden buildings. The characteristics of casualties in the Kumamoto earthquake are classified as household attributes and building damage caused by the foreshock and mainshock. In the second part, we apply equations (Nakashima and Okada 2008 and Okada and Nakashima 2015) to the Masiki area to determine the total number of casualties with a focus on deaths. The number of deaths due to total building damage from the foreshock and the mainshock in the case of 0 evacuees was estimated as 147. We then estimated the reduction effect on the number of casualties caused by the foreshock by using the survey data of the mainshock and foreshock. We found that evacuation during the mainshock decreased the death toll by 128 people. Moreover, the number of injured people decreased by 657. Generally, most people who evacuate tend to return home over time. As a result, many people die at the time of a subsequent mainshock. It is important to provide death risk information to each household to support their decision-making regarding appropriate evacuation.
  • 秦吉弥, 山内政輝, 小山真紀, 鍬田泰子, 中嶋唯貴
    土木学会論文集 B3(海洋開発)(Web) 公益社団法人 土木学会 73 (2) 216 - 222 2185-4688 2017/08 [Refereed][Not invited]
     
     During a scenario earthquake with MJ7.8 nearby Ryukyu Trench, not only strong motion but also huge tsunami with the maximum water level and run-up height of 6m and 15m, respectively is predicted in central Ishigaki City, Okinawa Prefecture, Japan. In this paper, seismic waveforms in the tsunami attack area were first predicted with very high density based on the SMGA models and microtremor measurements. Walking times from the prediction sites to the designated refuge places were then measured. Using non-evacuation time based on the time history of instrumental seismic intensity and measured time based on results of the walking experiment, finally, we evaluated the difficult area for tsunami evacuation in central Ishigaki City.
  • 中嶋唯貴, 岡田成幸, 北原将行
    地域安全学会論文集(CD-ROM) (30-31) ROMBUNNO.31‐30  2017/03 [Refereed][Not invited]
  • YAMAUCHI Masaki, HATA Yoshiya, KUWATA Yasuko, KOYAMA Maki, NAKASHIMA Tadayoshi
    Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 公益社団法人 土木学会 73 (2) I_222 - I_227 2017 [Refereed]
     
     During a large scale scenario earthquake, huge tsunami with early travel time is striked in Tobishima, Sakata City, Japan. In this study, ground shaking characterisrtics in the tsunami attack area were evaluated using microtremor measurement with high density. The strong motions in Tobishima were then estimated based on the asperity models considering the ground shaking characteristics. Furthermore, the difficult time for tsunami evacuation during the earthquake was calculated using instantaneous instrumental seismic intensity. Finally, we discussed the influence of the strong motion on the tsunami evacuation based on the relationship between the travel time and the difficult time.
  • 山内政輝, 秦吉弥, 村田晶, 鍬田泰子, 小山真紀, 中嶋唯貴, 宮島昌克, 常田賢一
    土木学会論文集 A1(構造・地震工学)(Web) 公益社団法人 土木学会 73 (4) I_796‐I_804(J‐STAGE) - I_804 2185-4653 2017 [Refereed][Not invited]
     
     During a northern Noto peninsula scenario earthquake, not only strong motion but also huge tsunami is attacked in Hegura Island, Wajima City, Japan. In this study, first, seismic waveforms in Hegura Island were estimated based on the asperity models with consideration of ground shaking characteristics by microtremor measurements. Next, walking times from the sites of interest to designated refuge place were measured based on in-situ investigation. Finally, using the non-evacuation time during the earthquake and the required evacuation time after the earthquake, we evaluated the difficult area for tsunami evacuation in Hegura Island taking into account the tsunami travel time.
  • A NEW CAUSALITY MODEL FOR EVALUATING THE PROBABIITY OF HUMAN DAMAGE FROM INJURY TO DEATH IN COLLAPSED BUILDINGS
    Shigeyuki OKADA, Tadayoshi NAKASHIMA
    proceeding of 16th World Conference on Earthquake Engineering 2017. 2017/01 [Not refereed][Not invited]
  • Volumetric Loss Estimation for Buildings Collapsed in Earthquake
    Akito IIDA, Shigeyuki OKADA, Tadayoshi NAKASHIMA
    Proceeding of 16th World Conference on Earthquake Engineering 2017. 2017/01 [Not refereed][Not invited]
  • 中嶋 唯貴
    開発こうほう 北海道開発協会 (639) 26 - 29 2016/10 [Not refereed][Not invited]
  • 中嶋 唯貴, 岡田 成幸
    北海道地区自然災害科学資料センター報告 = Bulletin of the Natural Disaster Science Data Center, Hokkaido 北海道地区自然災害科学資料センター (北海道大学大学院工学研究院) 29 59 - 66 0914-1111 2016/03 [Not refereed][Not invited]
  • MINATO Fumihiro, HATA Yoshiya, NAKASHIMA Tadayoshi, KOYAMA Maki, KUWATA Yasuko, YAMADA Masayuki, TOKIDA Ken-ichi
    Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 公益社団法人 土木学会 72 (2) I_509 - I_514 2016 [Refereed]
     
     During the 1993 Southwest Hokkaido Earthquake, not only strong motion but also huge tsunami is attacked in Aonae District, Okushiri Island, Japan. Seismic waveforms in the tsunami strike area were already estimated based on the SMGA models considering local site effects. In this paper, walking times from the sites of interest to original refuge places were measured. Using non-evacuation time during the 1993 main shock and evacuation time after the 1993 main shock, we evaluated the difficult area for tsunami evacuation in Aonae District taking into account tsunami travel time. The evaluated difficult area agree well with the actual area of human casualty observed after the 1993 main shock.
  • HATA Yoshiya, MINATO Fumihiro, KOYAMA Maki, KUWATA Yasuko, NAKASHIMA Tadayoshi, TOKIDA Ken-ichi
    Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 公益社団法人 土木学会 72 (2) I_503 - I_508 2016 [Refereed]
     
     During a scenario earthquake with MW9.0 along the Nankai Trough, not only strong motion but also huge tsunami is predicted in Hirokawa Town, Wakayama Prefecture, Japan. Seismic waveforms in the Tsunami attack area were already predicted with very high density based on the SMGA models considering local site effects. In this paper, walking times from the evaluation sites of local site effect to designated refuge places were measured. Using the non-evacuation time based on the time history of instrumental seismic intensity and the measured time based on results of the walking experiment, we evaluated the difficult area for tsunami evacuation in Hirokawa Town.
  • Seismic 3D Indoor Risk Assessment for Inhabitants Using the Method of Human Body and Overturned Funiture-overturned Detection
    Tadayoshi NAKASHIMA, Shigeyuki OKADA, Kouhei OKUDA
    地域安全学会論文集 27 257 - 265 2015/11 [Refereed][Not invited]
  • Makoto Kisen, Shigeyuki Okada, Tadayoshi Nakashima
    AIJ Journal of Technology and Design Architectural Institute of Japan 21 (47) 89 - 94 1881-8188 2015/02/01 [Refereed][Not invited]
     
    This study developed an image processing technology which was capable of data extraction of the digital information out of topographic maps of analog paper. Applying this technology for the purpose of seismic risk analysis in Sapporo urban area and the suburbia in the time series from 1940s to 1990s, we are able to cultivate an understanding in the field of social geography with the addition of the comparative analyses of estimated seismic intensity maps of these areas. We are able to propose a safety design of city planning of Sapporo area from the point of view of earthquake engineering.
  • 岡田成幸, 中嶋唯貴
    大規模地震に対する地域保健基盤整備実践研究 平成25-26年度 総合研究報告書 41 - 45 2015 [Not refereed][Not invited]
  • 岡田成幸, 中嶋唯貴
    大規模地震に対する地域保健基盤整備実践研究 平成26年度 総括・分担研究報告書 147 - 161 2015 [Not refereed][Not invited]
  • 奥田 幸平, 岡田 成幸, 中嶋 唯貴
    地域安全学会論文集 地域安全学会事務局 (22) 61 - 71 1345-2088 2014/11 [Refereed][Not invited]
  • 中嶋 唯貴, 岡田 成幸, 高橋 遥
    地域安全学会論文集 地域安全学会事務局 (22) 11 - 19 1345-2088 2014/11 [Refereed][Not invited]
  • A Smartphone-Based System for In-House Safety Using Augmented Reality Technology
    M. KOYAMA, N. Yokomakura, S. Okada, T. Nakashima, J. Kiyono
    The 5th Conference of the International Society for Integrated Disaster Risk Management (IDRIM 2014) 133 - 144 2014/10 [Not refereed][Not invited]
  • JAPANESE REGIONAL IMBALANCE OF FINANCIAL EXPENDITURE REQUIRED FOR HOUSING RECONSTRUCTION IN MUNICIPAL AND HOUSEHOLD UNITS
    Tadayoshi NAKASHIMA, Shigeyuki OKADA, Takafumi WAKAUMI, Hitoshi TANIGUCHI, Takeshi SATO, Chiaki WATANABE, Shinichi MINAMI
    Second European Conference on Earthquake Engineering and Seismology 2014. 2014/09 [Not refereed][Not invited]
  • NAKASHIMA TADAYOSHI, OKADA SHIGEYUKI, CHUJO KOSUKE
    北海道地区自然災害科学資料センター報告 北海道地区自然災害科学資料センター (北海道大学大学院工学研究院) 27 39 - 48 0914-1111 2014/03/31 [Not refereed][Not invited]
  • MINAMI SHIN'ICHI, OKADA SHIGEYUKI, NAKASHIMA TADAYOSHI
    北海道地区自然災害科学資料センター報告 北海道地区自然災害科学資料センター (北海道大学大学院工学研究院) 27 33 - 38 0914-1111 2014/03/31 [Not refereed][Not invited]
  • OKADA SHIGEYUKI, NAKASHIMA TADAYOSHI
    大規模地震に対する地域保健基盤整備実践研究 平成25年度 総括・分担研究報告書 57 - 72 2014 [Not refereed][Not invited]
  • OKUBO Makoto, SAIGA Atsushi, SUZUKI Sadaomi, NAKASHIMA Tadayoshi
    地震. 2輯 日本地震学会 65 (1) 21 - 30 0037-1114 2012/09 [Refereed][Not invited]
     
    We studied the differences between the velocities of seismic waves and elastic waves in rock core samples to understand the spatial-scale effect of heterogeneous contents. The wave velocities determined from seismic observations and rock property tests of rock core sample are different in most cases. These variations are caused by the difference in the spatial scales of each measurement (i.e., the differences in wave lengths), since the waves refer to the corresponding scales and velocities of heterogeneity in the propagating medium. In order to estimate the seismic wave velocities with very short baselines (∼100 m) by "multiple blasting", we analyzed the arrival times of initial motion, and conducted waveform correlation analyses to transversal pairs for S-wave. Under the assumption that the seismic wave slowness (1/velocity) is an average value corresponding to the medium comprising homogenous fresh rocks at a small scale and the other heterogeneous components such as cracks at larger scale, we compared the seismic wave velocities with the elastic wave velocities that were measured using the rock core samples taken near the seismometers. Our results verified that parameters related to the medium heterogeneity such as crack density, crack shape, and the water content of the medium can be estimated from velocities comparisons.
  • Development of Active Evacuation system through Computer Vision Technology
    Tadayoshi NAKASHIMA, Shigeyuki OKADA, Maki KOYAMA
    15th World Conference on Earthquake Engineering 2012.  - zisinnda 2012/09 [Not refereed][Not invited]
  • NAKASHIMA Tadayoshi
    地域安全学会論文集 地域安全学会 0 (15) 241 - 247 1345-2088 2011/11 [Refereed][Not invited]
     
    This paper discusses an effective strategy of seismic strengthening of wooden houses dominant in Japan in aim for reduction of death toll. In the first part, we construct the equations by which the death toll in a district can be estimated in relation with the rate of seismic strengthening. It is developed by rebuilding or seismic repairing, and is worsen as aging of houses. In the second part, we applied the equations to all prefectures in Japan and estimated the temporal change of death reduction to figure out the effect of rebuilding and of changing where people live. As a result, we fou...
  • 鍬田泰子, 武市淳, 中嶋唯貴, 太田裕
    日本地震工学シンポジウム論文集(CD−ROM) 13th ROMBUNNO.GO20-THU-PM-6  2010/11/05 [Not refereed][Not invited]
  • 太田裕, 中嶋唯貴
    日本地震工学シンポジウム論文集(CD−ROM) 13th ROMBUNNO.GO21-FRI-AM-9  2010/11/05 [Not refereed][Not invited]
  • OKADA Shigeyuki, NAKASHIMA Tadayoshi, KOYAMA Maki, MATSUSHITA Kosho
    Journal of social safety science 地域安全学会 0 (13) 213 - 221 1345-2088 2010/11 [Refereed][Not invited]
     
    It is one of the ironclad rules of risk management that we take multiple countermeasures for reducing human casualties in dwellings attacked by hazardous earthquakes. Add to the diagnostic system enable to assist a safety arrangement of furniture, which is classified into the pre-earthquake countermeasures, we propose a seismic alert system recognizing automatically the indoor risky space with computer vision as an application of the earthquake early warning. This system has the function capable of automatically recognizing the dangerous floor plan out of indoor spaces by applying the one-p...
  • Tadayoshi Nakashima, Shigeyuki Okada
    AIJ Journal of Technology and Design 日本建築学会 16 (34) 997 - 1002 1341-9463 2010/10 [Refereed][Not invited]
     
    For the purpose of simplify the method on death toll, this paper proposes the simple method on population for effectively and efficiently selecting the seismic hazard maps having significant impact on Nagoya city, Japan, as an example area in this study. We select the extensive distribution of population exposure seismic intensity by use of the simple method on population, and estimate the effectiveness and the efficiency of selected it. The result shows that nearly 95% of estimated victims in Nagoya city is able to be covered by only 2 maps selected in the strategic choice approach.
  • OKADA Shigeyuki, NAKASHIMA Tadayoshi
    総合論文誌 社団法人日本建築学会 0 (8) 93 - 98 1347-6548 2010/01 [Refereed][Not invited]
     
    We propose a seismic alert system recognizing automatically the indoor risky space with computer vision as an application of the earthquake early warning. This system has the function capable of automatically recognizing the dangerous floor plan out of indoor spaces by applying the one-point perspective projection and safely guiding by artificial voice the inhabitants stayed in the dangerous spaces in an emergency case of getting the earthquake early warning start. In the ubiquitous info-network environment utilizing the proposed system, which contributes to reduce human casualty in indoor ...
  • NAKASHIMA Tadayoshi, OKADA Shigeyuki
    Journal of social safety science 地域安全学会 0 (11) 377 - 384 1345-2088 2009/11 [Refereed][Not invited]
     
    This paper discusses effective strategy of seismic strengthening houses for reduction of death toll. In the first part, we construct the equations by which the death toll in a single house unit can be estimated with considering the rate of seismic strengthening. In the second part, we apply the equations to the area in Owariasahi city and estimate death reduction in order to figure out the effect of seismic strengthening strategies. As a result we simulated that when the seismic repairing of houses is planned in target districts the strategy giving priority to vulnerable houses is more effe...
  • Tadayoshi Nakashima, Shigeyuki Okada
    Journal of Structural and Construction Engineering 日本建築学会 74 (639) 775 - 783 1340-4202 2009/05 [Refereed][Not invited]
     
    For the purpose of optimizing the plan for seismic protection scenario in municipal unit, this paper proposes the strategic method for effectively and efficiently selecting the seismic hazard maps having significant impact on Nagoya city, Japan. as an example area in this study. In the first part, we make geographical database about 41 sheets of seismic intensity maps on Nagoya city and its population. In the second part, we select the extensive distribution of seismic intensity by use of the cluster analysis, and estimate the effectiveness and the efficiency of selected extensive distribution of seismic intensity. The result shows that nearly 99% of estimated victims in Nagoya city are able to be covered by only 2 maps selected in the strategic choice approach.
  • Tadayoshi Nakashima, Shigeyuki Okada
    Journal of Structural and Construction Engineering 社団法人日本建築学会 73 (623) 79 - 86 1340-4202 2008/01 [Refereed][Not invited]
     
    We learned from the 1995 Hanshin Awaji earthquake that most of the death toll arised from many vulnerable wooden houses collapsed by seismic ground motions and seismic strengthening wooden houses is the highest priorty strategy for preventing death.This paper discusses effective strategy of seismic strengthening houses for reduction of death toll. In the first part, we construct the equations by which the death toll in districts can be estimated with considering the rate of seismic strengthening that is increased by rebuilding or seismic repairing, and the negative effect as aged deterioration of house. In the second part, we apply the equations to the area of 4 prefectures in Tokai district and estimate the time variation of death reduction in order to figure out the effect of some kinds of seismic strengthening strategies. As a result we simulated that when the seismic repairing of houses is planed in target districts the strategy giving priority to vulnerable houses is more effective to decrease the death toll than any other strategies having no priority on structural strength of house.
  • AN ESTIMATION OFNATIONWIDE EARTHQUAKE DEATH TOLL –IN CASE OF JAPAN –
    Yutaka OHTA, Nobuoto NOJIMA, Tadayoshi NAKASHIMA
    First European Conference on Earthquake Engineering and Seismology 2006. 2006/09 [Not refereed][Not invited]
  • KIYONO Junji, SPENCE Robin J.S, NAKASHIMA Tadayoshi
    Journal of natural disaster science 日本自然災害学会 28 (2) 73 - 83 0388-4090 2006 [Refereed][Not invited]
     
    Pyroclastic flow is a dangerous hazard for people and houses so buildings have to provide a measure of protection to the occupants. In order to improve the structural strength of buildings, we need to know the structural behavior against the lateral pressure of the flow. In this study, dynamic behavior of unreinforced masonry structures affected by pyroclastic flows was analyzed using 2-dimensional (2D) Distinct Element Methods (DEM). DEM is a numerical analysis technique, in which the positions of elements are calculated by systematically solving equations. The structure is modeled as an a...
  • NAKASHIMA Tadayoshi
    Journal of social safety science 地域安全学会 0 (7) 9 - 14 1345-2088 2005/11 [Refereed][Not invited]
     
    We have learned many problems by the 1995 Hanshin Awaji earthquake. The chief cause damage was collapsed a houses. Most of the death toll accompanied collapsed houses by earthquake. This study aims at estimation anticipating risk of collapsed house. Discussion is needed in relation with earthquake resistant diagnosis score. If lower is the necessary earthquake resistant diagnosis score then reduction in resource quantity comes. Therefore, analyze change about resource quantity. On the basis of risk estimation, a comparison between the present condition and analysis result by a study was mad...

MISC

Books etc

Association Memberships

  • 日本風工学会   日本免震構造協会   JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING   THE JAPANESE SOCIETY FOR ARTIFICIAL INTELLIGENCE   INSTITUTE OF SOCIAL SAFETY SCIENCE   ARCHITECTURAL INSTITUTE OF JAPAN   

Research Projects

  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Pioneering)
    Date (from‐to) : 2021/07 -2025/03 
    Author : 瀬戸口 剛, 中嶋 唯貴, 渡部 典大
     
    ①対象地方都市のうち函館市と釧路市の中心市街地における、災害危険度と避難可能性について明らかにした。両市が公開する災害危険区域やハザードマップなどを用いて、津波想定浸水区域を500ｍメッシュごとに示し、津波想定浸水深を３ｍ区分で図示した。同時に、両市の都市計画基礎調査より、建物高さをＧＩＳ上で示した。それらを統合して、津波想定浸水深＋２階分をバッファーとし、それよりも高い建物、かつ新耐震基準を満たしている建物を、津波被害を免れる残存可能性が高い「津波避難可能ビル」とし、ＧＩＳ上で示した。さらに「津波避難可能ビル」のうちで、津波想定浸水深＋２階分よりも高い階数部分の床面積を、それぞれ明らかにしＧＩＳ上に明示した。その結果、自治体が指定する「津波避難ビル」に加えて、「津波避難可能ビル」が大幅に上回ることが明らかとなり、津波災害時に避難できるビルが大きく増加することを示した。 ②「津波避難可能ビル」に避難可能な人口を明らかにした。対象地方都市にうち函館市において、「津波避難可能ビル」周辺に居住する人口から、高齢者の避難を考慮して分速28ｍで「津波避難可能ビル」に到達できる人口を明らかにした。その結果、中心市街地居住人口91,962人のうち、函館市が指定する「津波避難ビル」へ避難できる居住人口は49,279人（居住人口の53.6％）に留まることに比べて、「津波避難可能ビル」全体を対象とすると88,428人（同96.2％）が津波からの避難が可能となることが明らかとなった。中心市街地にある多くの建物ストックを「津波避難可能ビル」として指定し、活用することで、多くの人命を津波被害から免れる可能性を示すことができ、防災計画において画期的な結果が明らかとなった、また、中心市街地へのコンパクトシティを推進する都市計画においても、津波からの甚大な被害を回避できる可能性が高まり、有用な結果となった。
  • 日本学術振興会：科学研究費助成事業 挑戦的研究(萌芽)
    Date (from‐to) : 2021/07 -2024/03 
    Author : 中嶋 唯貴, 小篠 隆生, 植松 武是
     
    わが国の人口の5％もの住民が土砂災害警戒区域に住居があり、斜面改良など多額の費用が掛かる対策を全エリアに実施するのは不可能であり新たな対策の検討が急務である。本年度は、土砂災害における人的被害発生家屋の倒壊状況の把握と土砂による住居内における生存可能な空間の損失率の調査と評価を実施する。土砂災害に伴う被災建物の実態を2004年新潟県中越地震、2018年北海道胆振東部地震、令和元年台風19号、令和2年九州豪雨における資料の掘り起こし並びに調査を実施した。加えて、2018年胆振東部地震において2階部の死亡率が一階部に比べ明らかに小さいことから、胆振東部地震で得られた写真を再現できるよう個別要素法で建物と土砂災害を再現し、建物に、速度、土砂厚さを変更しながら倒壊メカニズムと生存空間の変化に着目し検討を実施した。結果、2階部の生存空間を担保するためには一階が倒壊した場合において2階部落下の衝撃に耐える必要があり、2階部の剛性が重要となることが判明した。しかしながら、土砂厚さが2階床を超えるとほぼすべてのケースで建物は1階2階とも倒壊し、2階部の生存可能空間は完全に損失する結果となった。このことより、胆振東部地震のケースとは異なり、土砂が2階部床の高さを超えると2階部においても死亡率が高くなることが危惧される。今後は、土砂災害警戒区域における住宅の居室構成や敷地内における建築場所を調査し個別要素法で再現することで、生存空間に与える影響をより詳細に検討していく。
  • 部屋のコーディネート判定手法の確立に関するテーマ
    令和４年度ニトリみらい社会デザイン講座研究公募
    Date (from‐to) : 2022/04 -2023/03 
    Author : 中嶋唯貴, 小澤丈夫, 内藤誠人
  • 京都大学防災研究所：
    Date (from‐to) : 2021/04 -2023/03 
    Author : 中嶋唯貴, 西嶋一欽, 友清 衣利子
  • RTK 搭載バルーンによる⾼密度 3 次元⾵速場実測
    Date (from‐to) : 2020/04 -2023/03 
    Author : 大風翼, 西嶋一欽, 中嶋唯貴
  • 日本学術振興会：科学研究費助成事業 基盤研究(B)
    Date (from‐to) : 2020/04 -2023/03 
    Author : 中嶋 唯貴, 和藤 幸弘, 小山 真紀, 麻里 哲広, 竹内 慎一
     
    本年度は、20年度に実施した現状の人的被害予測における問題点に検討と減災施策の現況把握結果を用い、厳冬期の人的被害予測モデルの構築と、道内主要都市での被害評価及び検証を実施した。 ①評価関数の高精度化：まず、木造・非木造損傷度関数であるが、既に耐震診断値分布を用い式が構成されているが、これを厳冬期においても適用可能とすべく、耐震評点分布に積雪荷重を地域ごとに加えることができる損傷度関数を構築した。これにより、地域ごとの積雪量の差異による被害評価が可能となった。また、閉じ込め時の余命であるが、10℃以下で低体温症や凍死が発生することを加味し、関連環境下における低体温症による行動不能や死亡に至る時間を衣服等の状況別に考慮可能な低体温症に関する評価式を構築した。加えて、閉じ込め者の救助時間について兵庫県南部地震、熊本地震のデータを収集しモデル化を試みた。 ②道内主要都市を用いた被害評価：被害想定地域として、積雪量の異なる稚内商圏、札幌商圏、函館商圏を対象とし、今年度構築した損傷度関数を用い、積雪を考慮した被害関数を適用することで、季節ごとの建物被害数、人的被害者数を算出した。また、閉じ込め者数の推定と要救助時間の算出を実施した。結果、結果に比べ閉じ込め者は3倍ほどになり救助完了時間は大幅に増加することが判明した。加えて、北海道において倒壊に伴う閉じ込め者は冬季においても室内が温かいことから薄着で生活している市民も多く建物倒壊時には寒冷曝露により短時間で低体温症での行動不能や死亡となることが判明した。北海道における生活様式に着目した減災施策の立案が重要となる。 ③減災戦略の検討：昨年度の賃貸住宅の危険度把握に引き続き本年度は、中古住宅の危険度把握と夜間発生地震の危険度把握を実施した。特に夜間に関しては暗闇の中地震最中に適切な行動がとれず昼間の4倍の負傷が発生することが判明した。
  • 部屋のコーディネート判定手法の確立に関するテーマ
    令和４年度ニトリみらい社会デザイン講座研究公募
    Date (from‐to) : 2021/04 -2022/03 
    Author : 中嶋唯貴、小澤丈夫、林響太
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Special Purposes
    Date (from‐to) : 2019/10 -2020/03 
    Author : Yoshihisa Maruyama
     
    A powerful typhoon Faxai, the 15th typhoon in 2019, made landfall in Tokyo’s neighboring Chiba Prefecture around 5:00 a.m. on September 9. It caused severe structural damage especially in the southwestern part of Chiba Prefecture. It also triggered extensive and continued power outage in Chiba Prefecture. Power supply was disrupted at approximately 640 thousand houses in Chiba Prefecture as of 10:30 am on September 9. The power failure continued for about two weeks mainly in the southern part of Chiba Prefecture. In this study, various functional and structural damage caused by this typhoon was investigated. In Japan, it is anticipated that extensive power outages may occur after the Tokyo Inland and the Nankai Trough earthquakes in the near future. This study will be helpful to establish a resilient water supply system against future earthquakes.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
    Date (from‐to) : 2017/04 -2020/03 
    Author : Nakashima Tadayoshi
     
    In this study, a method for estimating human casualties during compound disasters such as earthquakes and tsunamis was developed, while considering future changes within a city. The method was then applied to major cities in Hokkaido to estimate human casualties during such events. Although it was found that casualties caused by collapsing buildings were low, casualties caused by indoor damage were significant. Additionally, the effects of disaster prevention measures such as self-help, mutual assistance, and public assistance in mitigating human casualties were estimated. It was found that, in locations such as Kushiro City, casualty mitigation would be a challenge despite the implementation of disaster prevention measures in areas where tsunamis were expected, as residents reside in high-risk areas. Consequently, it may be necessary to consider their relocation to safer areas.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    Date (from‐to) : 2016/04 -2019/03 
    Author : Okada Shigeyuki, ITO yoshinori, TAKAHASHI haruka, MATSUMOTO masamu, MURAGUCHI saya, SHINODA akane, TSUNODA satoaki, NISHIKAYAMA junichiro, TANIGAWA mai
     
    The target covered in this study is the preventable death, that means 'delayed death' even those who were trapped and alive in damaged building immediately after earthquakes. In order to prevent the preventable death, we first proposed a model for estimating the probability of survivor's injury shown in Injury Severity Score (ISS). And to verify our causal model, we simulated wooden house collapse using 3-dimentional Discrete Element Method. As a result of this, it was found that a relatively large number of safety zones even in total collapsed buildings are scattered unevenly and temporally. By applying the pseudo-ISS, the actual lethality ratio observed in destroyed buildings was possible to be simulated in this Model. Furthermore, for estimating the limit time to transport the rescued people to hospital, the relationship between the remaining survival time and the ISS is functionalized, and it was clarified that the victims with ISS of 41 to 75 should promptly convey to hospitals.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    Date (from‐to) : 2013/04 -2016/03 
    Author : Okada Shigeyuki, NAKASHIMA Tadayoshi, SATO Takeshi, WATANABE Chiaki, KOYAMA Maki, TOYADA Yusuke, TANIGUCHI Hitoshi, MINAMI Shinichi, CUI Mingji, OKUDA Kohei, KISEN Makoto, TAKAHASHI Haruka, OOIDE Rio, IIDA Akito, KITAHARA Masayuki, WAKAUMI Takafumi, ARIYOSHI Kazuha, ATAKA Shouyou, MATSUMOTO Masamu, MURAGUCHI Saya
     
    We proposed the concept of the Family-life Continuity Plan (FCP), which is a time-variation plan for individual households to quickly recover their daily living standards when a seismic event attacks. The FCP is defined as the following three kinds of disaster aspect: First, in order to handle human casualties of the inhabitants quantitatively in modeling, we introduced the Injury Severity Score, which is devised to classify earthquake victims with multiple trauma. Second, we modeled the average asset for white-collar worker families in Japan. We examined the effect of personal seismic countermeasures as structural strengthening of their own house or carrying insurance. Third, we estimated their psychological harm due to the death of family member and a sense of loss in terms of K6 score which is widely used in the field of mental disease. Finally, earthquake risk evaluation of family-life was investigated considering regional characteristics and individual condition.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
    Date (from‐to) : 2007 -2009 
    Author : OKADA Shigeyuki, TAHIGUCHI Hitoshi, IDOTA Hideki, HAYASHI Katsuaki, TAKEUCHI Shinichi, NACHI Noriyuki, NAKASHIMA Tadayoshi, SHIMADA Yoshikazu, ISHIDA Takashi
     
    Many kinds of structure systems on wooden houses have been adopted throughout Japan, which brings the difficulty of seismic diagnosis for wooden houses. Added to this situation, the method of diagnosis for houses is subjective evaluation that depends on diagnostic technicians' knowledge and experience. We proposed the feasible manners to objectively estimate the effect on the deterioration of earthquake-resistant capacity of houses caused by aged deterioration and/or damaged by natural hazards such as earthquakes through the microtremors analysis.

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