Updated on 2026/03/10

写真a

 
Kumagai Tomohiko
 
Organization
Undergraduate School School of Science and Technology Professor
Title
Professor
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Degree

  • Master of Engineering ( Tokyo Institute of Technology )

  • Doctor of Engineering ( Tokyo Institute of Technology )

Research Interests

  • 建築各部構造

  • Structure of each section of buildings

Research Areas

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

Education

  • Tokyo Institute of Technology   Graduate School, Division of Science and Engineering

    - 2004

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  • Tokyo Institute of Technology   Science of Engineering   Architecture and Building Engineering

    - 2004

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    Country/Region: Japan

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  • Tokyo Institute of Technology   School of Engineering   Dept. of Architecture and Building Engineering

    - 1999

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    Country/Region: Japan

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Research History

  • Meiji University   School of Science and Technology Department of Architecture   Professor

    2021.10

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  • Meiji University   School of Science and Technology Department of Architecture   Associate Professor

    2016.10 - 2021.9

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  • Meiji University   School of Science and Technology Department of Architecture   Senior Assistant Professor

    2013.4 - 2016.9

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  • -:東京工業大学 大学院理工学研究科建築学専攻 助教

    2007 - 2013.3

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  • -:Tokyo Institute of Technology Department of Architecture and Building Engineering, Graduate School of Science and Engineering Assistant Professor

    2007 - 2013.3

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  • :東京工業大学 大学院理工学研究科建築学専攻 助手

    2004 - 2007

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  • :Tokyo Institute of Technology Department of Architecture and Building Engineering, Graduate School of Science and Engineering Research Associate

    2004 - 2007

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  • :東京工業大学 大学院理工学研究科 リサーチ・アシスタント(RA)

    2001 - 2002

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  • :Tokyo Institute of Technology Graduate School of Science and Engineering Research Assistant

    2001 - 2002

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  • Tokyo Institute of Technology Graduate School of Science and Engineering, Department of Architecture and Building Engineering, Graduate School of Science and Engineering Architecture and Building Engineering   Assistant Professor

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Professional Memberships

  • Int. Assoc. for Shell and Spatial Structures (IASS)

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  • Architectural Institute of Japan

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  • 日本建築学会

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  • IASS(国際シェル・空間構造学会)

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Committee Memberships

  • IASS(国際シェル・空間構造学会)   Hangai Prize Committee  

    2005   

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    Committee type:Academic society

    IASS(国際シェル・空間構造学会)

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  • Int. Assoc. for Shell and Spatial Structures (IASS)   Hangai Prize Committee  

    2005   

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    Committee type:Academic society

    Int. Assoc. for Shell and Spatial Structures (IASS)

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Papers

  • SEISMIC RESPONSE REDUCTIONS BY PLURAL TMDS OF CYLINDRICAL LATTICE ARCH ROOF SUPPORTED BY SINGLE STORY SUBSTRUCTURE SIMULATING SCHOOL GYMNASIUM IN LARGE-SCALE SHAKING TABLE TESTS

    Tomohiko KUMAGAI, Haru TAKAHASHI, Shun KUROSAKI, Toru TAKEUCHI, Yuki TERAZAWA, Jun FUJIWARA

    Journal of Structural and Construction Engineering (Transactions of AIJ)   90 ( 835 )   1006 - 1017   2025.9

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    Publishing type:Research paper (scientific journal)   Publisher:Architectural Institute of Japan  

    DOI: 10.3130/aijs.90.1006

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  • SCALED SHAKING TABLE TEST OF CYLINDRICAL LATTICE ARCH ROOF SUPPORTED BY SINGLE STORY SUBSTRUCTURE SIMULATING SCHOOL GYMNASIUM

    Toru TAKEUCHI, Yuri YAMAGUCHI, Yuki TERAZAWA, Sujan PRADHAN, Tomohiko KUMAGAI, Koshiro NISHIMURA, Tetsuo YAMASHITA, Jun FUJIWARA

    Journal of Structural and Construction Engineering (Transactions of AIJ)   89 ( 823 )   955 - 966   2024.9

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    Publishing type:Research paper (scientific journal)   Publisher:Architectural Institute of Japan  

    DOI: 10.3130/aijs.89.955

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  • Scaled Shaking Table Tests Simulating the Damage of the School Gymnasium in the 2016 Kumamoto Earthquake

    Jun Fujiwara, Yuki Terazawa, Akiko Kishida, Koshiro Nishimura, Tetsuo Yamashita, Tomohiko Kumagai, Toru Takeuchi

    Journal of the International Association for Shell and Spatial Structures   64 ( 2 )   43 - 56   2023.6

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    Publishing type:Research paper (scientific journal)   Publisher:International Association for Shell and Spatial Structures  

    The transverse out-of-plane response of the RC moment frame on the arena floor damaged a school gymnasium that was expected to function as a natural disaster shelter. It was composed of heavy RC substructure and a light steel roof, which partially collapsed, resulting in the facility's permanent destruction in the 2016 Kumamoto earthquake. This study describes scaled shaking table tests that simulate out-of-plane response-induced damage to the RC moment frame of the school gymnasium during the 2016 Kumamoto earthquake and verifies the damage mechanism proposed by the previous numerical simulation and the efficiency of a response control by the friction damper support. Furthermore, the study validates two methods for evaluating the response of the RC moment frame and the overall buckling strength of the roof truss member with semi-rigid joints.

    DOI: 10.20898/j.iass.2023.006

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  • MEMBER GLOBAL BUCKLING STRENGTH ESTIMATION OF SPATIAL TRUSS ROOF WITH SEMI-RIGID JOINTS CONSIDERING BOUNDARY CONDITIONS

    Yuki TERAZAWA, Ryunosuke KISHIZAWA, Toru TAKEUCHI, Tomohiko KUMAGAI, Miao CAO

    Journal of Structural and Construction Engineering (Transactions of AIJ)   86 ( 786 )   1235 - 1246   2021.8

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    Publishing type:Research paper (scientific journal)   Publisher:Architectural Institute of Japan  

    DOI: 10.3130/aijs.86.1235

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  • Seismic response evaluation considering natural period ratios and mass ratios with supporting substructure of HP Lattice shells with straight edge lines subjected to earthquake motions with arbitrary direction

    Tomohiko Kumagai, Mari Wakao, Kazuya Nitta, Toshiyuki Ogawa

    Journal of Structural and Construction Engineering   86 ( 780 )   213 - 223   2021

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Architectural Institute of Japan  

    DOI: 10.3130/aijs.86.213

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  • Effects of installing direction of TMDs on seismic response reduction of cylindrical lattice shell roofs with various magnifications of out-of-plane stiffness of roof

    Tomohiko Kumagai, Yuichi Mama, Katsufumi Hata, Toshiyuki Ogawa

    Journal of Structural and Construction Engineering   84 ( 765 )   1411 - 1419   2019

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Architectural Institute of Japan  

    DOI: 10.3130/aijs.84.1411

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  • Shaking table tests of cylindrical lattice arch roofs supported by spherical sliding bearings subjected to earthquake motions

    Tomohiko Kumagai, Genta Roppongi, Jutaro Takahashi, Ryota Matsui, Toru Takeuchi

    Journal of Structural and Construction Engineering   83 ( 752 )   1465 - 1475   2018.10

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.3130/aijs.83.1465

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  • Response evaluation of cylindrical shell roofs with various bearings supported by RC Substructures

    Yusuke Inaba, Yuki Terazawa, Ryota Matsui, Tomohiko Kumagai, Toru Takeuchi

    Journal of Structural and Construction Engineering   83 ( 751 )   1263 - 1272   2018.9

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.3130/aijs.83.1263

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  • Cyclic loading tests on steel roof bearings and effects on roof responses

    Yusuke Inaba, Yuki Terazawa, Ryota Matsui, Tomohiko Kumagai, Toru Takeuchi

    Journal of Structural and Construction Engineering   83 ( 750 )   1129 - 1137   2018.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Architectural Institute of Japan  

    DOI: 10.3130/aijs.83.1129

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  • ACCELERATION OF THREE-DIMENSIONAL LARGE EDDY SIMULATION AROUND CYLINDRICAL ROOFS USING MULTIGRID METHOD WITH PLURAL TWO-DIMENSIONAL COARSE MESHES Reviewed

    Takuzo Yamashita, Miyamura Tomoshi, Toshiyuki Ogawa, Tomohiko Kumagai

    Journal of Structural and Construction Engineering (Transactions of AIJ)   82 ( 740 )   1621 - 1631   2017.10

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Architectural Institute of Japan  

    &nbsp;In order to estimate dynamic wind load on the spatial structures, for which it can be critical load, by reproducing wind around them with high accuracy, three-dimensional large eddy simulation (3D LES) with high resolution model is required. For such a simulation, which leads to a large-scale problem, as it requires a large amount of computational time, development of calculation algorithm to speed up 3D LES is desired to promote practical use. In the case of using splitting method, where pressure and wind velocity are solved separately, computational time is mostly spent in solving pressure poison equation.<br>&nbsp;In this paper, the multigrid preconditioned conjugate gradient (CG) method (MG method) using plural two-dimensional coarse meshes is proposed in order to reduce computational time for three-dimensional large eddy simulation around a structure with cylindrical roofs.<br>&nbsp;So far, the authors proposed the MG method using singular two-dimensional coarse mesh for the model, which is constructed in the way that three-dimensional mesh is generated by extruding the two-dimensional mesh in the spanwise direction, namely the direction perpendicular to streamwise direction. In this model, however, three-dimensional flow field cannot be generated. Thus, in this paper, we propose the method using plural two-dimensional coarse meshes applicable to the model where analytical domain is added on either side of the structure in order to generate a three-dimensional flow field around it.<br>&nbsp;Applicability of the proposed method is confirmed in comparison with diagonal preconditioned CG method (DIAG method) for two turbulence models, which are standard Smagorinsky model (SSM) and dynamic Smagorinsky model (DSM), and for two mesh resolution cases of Ny40 and Ny80 where the numbers of division in the spanwise direction of the analytical domain are 40 and 80, respectively.<br>&nbsp;Major findings obtained from numerical results are described below:<br>&nbsp;1) Significant error of wind load between the MG method and DIAG method is not observed in terms of statistical amount, that is, mean and fluctuating pressure coefficient.<br>&nbsp;2) For each turbulence model and mesh resolution model, the MG method results in speedup ranging from 118.2% to 137.6% compared to the DIAG method.<br>&nbsp;3) For different turbulent models of SSM and DSM, equivalent speedup effect is confirmed although the number of convergence fluctuates only for DSM until about 2,500 step, when sine function by which inflow turbulence are multiplied to prevent from numerical instability at an initial stage reaches 1.0.<br>&nbsp;4) In the MG method, as the scale of mesh model increases, the number of iteration dose not increase and computational time on the coarsest mesh relatively decreases. Thus, it is expected that the MG method has more speedup effect for larger scale problems.

    DOI: 10.3130/aijs.82.1621

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  • Influence of free vibration characteristics of cylindrical lattice shell roofs on seismic response reduction by plural TMDS Reviewed

    Tomohiko Kumagai, Takuya Shimoyama, Toshiyuki Ogawa

    Journal of Structural and Construction Engineering   82 ( 738 )   1233 - 1243   2017.8

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    DOI: 10.3130/aijs.82.1233

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  • Active vibration control of double-layer cylindrical lattice shell using modal control method Reviewed

    Ken'Ichi Minowa, Tomohiko Kumagai, Toshiyuki Ogawa

    Journal of Structural and Construction Engineering   79 ( 701 )   951 - 959   2014.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Architectural Institute of Japan  

    DOI: 10.3130/aijs.79.951

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  • Active vibration control method for arch structures based on acceleration feedback

    Ken'ichi Minowa, Tomohiko Kumagai, Toshiyuki Ogawa

    Journal of the International Association for Shell and Spatial Structures   54 ( 178 )   293 - 300   2013.12

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    Language:English   Publishing type:Research paper (scientific journal)  

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  • Active response control of arch structures using modal control method Reviewed

    Keriichi Minowa, Tomohiko Kumagai, Toshiyuki Ogawa

    Journal of Structural and Construction Engineering   78 ( 687 )   939 - 948   2013.5

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.3130/aijs.78.939

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  • Added mass on vibrating membrane roofs Reviewed

    Toshiyuki Ogawa, Tomohiko Kumagai, Yuta Kurokawa, Koji Tabuchi, Masanao Nakayama, Keiji Masuda

    Journal of Structural and Construction Engineering   77 ( 674 )   585 - 591   2012.4

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.3130/aijs.77.585

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  • Seismic performance of roof structure in steel gymnasia with energy dissipation devices Reviewed

    Toru Takeuchi, Masato Yuzawa, Tomohiko Kumagai, Toshiyuki Ogawa

    Journal of Structural and Construction Engineering   76 ( 669 )   1989 - 1995   2011.11

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.3130/aijs.76.1989

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  • Response evaluation of high-rise cylindrical lattice shell roofs with supporting substructures Reviewed

    Toru Takeuchi, Satoru Watanabe, Tomohiko Kumagai, Toshiyuki Ogawa

    Journal of Structural and Construction Engineering   76 ( 666 )   1515 - 1522   2011.8

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.3130/aijs.76.1515

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  • Elastic and elasto-plastic buckling loads of saddle-shaped HP lattice shells under vertical distributed load Reviewed

    Toshiyuki Ogawa, Tomohiko Kumagai, Sota Kuruma, Ken'Ichi Minowa

    Journal of Structural and Construction Engineering   76 ( 660 )   337 - 346   2011

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.3130/aijs.76.337

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  • APPLICATION OF MULTIGRID METHOD TO THREE-DIMENSIONAL INCOMPRESSIBLE VISCOUS FLOW ANALYSIS AROUND SHELL ROOFS

    MIYAMURA Tomoshi, KUMAGAI Tomohiko, OGAWA Toshiyuki, OGATA Shintaro, OHSAKI Makoto

    Journal of structural and construction engineering   72 ( 618 )   135 - 142   2007.8

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    Language:Japanese   Publisher:一般社団法人日本建築学会  

    An efficient linear solver using a multigrid method is developed for solving the pressure Poisson equation. The three-dimensional incompressible viscous fluid flow analysis is performed for investigating dynamic behaviors of a shell roof under strong wind. The improved balancing tensor diffusivity method and fractional step method (IBTD+FS method) combined with the finite element method is used for discretizing the Navier-Stokes equation. In this scheme, the pressure Poisson equation is solved implicitly. Solution process of the equation, which is a large-scale system of linear equations, is the most computationally expensive part. In order to improve the computation speed, a preconditioning technique based on a multigrid method for the conjugate gradient method (CG method) is employed. A simple formulation that combines the diagonal-scaling preconditioner and coarse grid correction is proposed. In addition, a finite element mesh for a two-dimensional analysis is used as a coarse grid for the three-dimensional analysis. The proposed method is implemented in the fluid flow analysis code. Performance study of the proposed method is conducted by solving a number of illustrative examples. Computation speed of the proposed method is much faster than the CG method with a simple diagonal-scaling preconditioner.

    DOI: 10.3130/aijs.72.135_2

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  • SEISMIC RESPONSE EVALUATION OF LATTICE SHELL ROOFS SUPPORTED BY MULTISTORY STRUCTURES

    TAKEUCHI Toru, KUMAGAI Tomohiko, SHIRABE Hiroo, OGAWA Toshiyuki

    Journal of Structural and Construction Engineering (Transactions of AIJ)   72 ( 619 )   97 - 104   2007

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    Language:Japanese   Publisher:Architectural Institute of Japan  

    Seismic responses of raised lattice roofs are known to be different from those of multistory structures, which include vertical response even against horizontal input, and their amplitudes are affected by the stiffness of supporting structures. Especially when the own period of the roof meets that of substructures, the response of the roof is known to be significantly amplified. In this paper, seismic response of latticed arches, cylindrical shells, and domes on multistory structures are studied including their amplification factors, followed by proposing simple evaluation method which is consistent with contemporary design method of multistory buildings.

    DOI: 10.3130/aijs.72.97_4

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    Other Link: http://www.aij.or.jp/paper/detail.html?productId=183183

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MISC

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Presentations

  • RESPONSE CONTROL OF LATTICE DOME ROOFS USING SEISMIC ISOLATION

    Joint Conference 7CUEE & 5ICEE  2010 

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  • RESPONSE CONTROL OF LATTICE DOME ROOFS USING SEISMIC ISOLATION

    Joint Conference 7CUEE & 5ICEE  2010 

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  • Shaking Table Tests of Cylindrical Lattice Shell Roofs Supported by Substructure with Viscous Damper Subjected to Horizontal Earthquake Motions

    Joint Conference 7CUEE & 5ICEE  2010 

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  • Shaking Table Tests of Cylindrical Lattice Shell Roofs Supported by Substructure with Viscous Damper Subjected to Horizontal Earthquake Motions

    Joint Conference 7CUEE & 5ICEE  2010 

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  • 制振機構を有する屋根型円筒ラチスシェルの地震応答実験 その1 実験概要,自由振動特性および地震応答性状

    日本建築学会大会学術講演会(東北)  2009 

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  • SHAKING TABLE TESTS OF CYLINDRICAL LATTICE SHELL ROOFS SUBJECTED TO HORIZONTAL EARTHQUAKE MOTIONSWITH ARBITRARY DIRECTION

    The 9th Asian Pacific Conference on Shell and Spatial Structures  2009 

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  • Seismic Response Evaluation of Lattice Roofs with Substructures

    Sixth International Conference on Urban Earthquake Engineering  2009 

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  • State-of-Arts View on Response Control Tecnologies on Metal Space Structures

    IASS Symposium 2009  2009 

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  • Seismic Response Evaluation of Low-to-High Rise Lattice Domes

    The 9th Asian Pacific Conference on Shell and Spatial Structures  2009 

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  • Dynamic Responses of Cylindrical Lattice Shell Roofs under Horizontal Earthquake Motions with Arbitary Direction by Shaking Table Tests

    IASS Symposium 2009  2009 

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  • Response Evaluation of Seismically Isolated Lattice Domes using Amplification Factors

    IASS Symposium 2009  2009 

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  • SHAPE OPTIMIZATION OF UNIDIRECTIONAL FREE SURFACE SHELLS SUBJECTED TO STRONG WIND

    Sixth International Conference on Urban Earthquake Engineering  2009 

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    Presentation type:Poster presentation  

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  • 応答増幅率を用いた支持架構付き免震ドームの地震応答評価 その1 粘性ダンパー及び弾塑性ダンパーが地震応答に与える影響

    日本建築学会大会学術講演会(東北)  2009 

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  • 円筒屋根面風荷重評価のための流入変動風を用いた有限要素法流体解析 その1 流入変動風の生成

    日本建築学会大会学術講演会(東北)  2009 

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  • 応答増幅率を用いた支持架構付き免震ドームの地震応答評価 その2 下部構造特性が地震応答に与える影響

    日本建築学会大会学術講演会(東北)  2009 

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  • 振動する膜屋根に作用する空気の付加質量効果 その1 自由振動実験による付加質量測定

    日本建築学会大会学術講演会(東北)  2009 

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  • 円筒屋根面風荷重評価のための流入変動風を用いた有限要素法流体解析 その2 円筒屋根面に作用する風圧力の性状

    日本建築学会大会学術講演会(東北)  2009 

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  • State-of-Arts View on Response Control Tecnologies on Metal Space Structures

    IASS Symposium 2009  2009 

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  • 振動する膜屋根に作用する空気の付加質量効果 その2 FEM を用いたポテンシャル解析による付加質量算定

    日本建築学会大会学術講演会(東北)  2009 

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  • Dynamic Responses of Cylindrical Lattice Shell Roofs under Horizontal Earthquake Motions with Arbitary Direction by Shaking Table Tests

    IASS Symposium 2009  2009 

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  • Response Evaluation of Seismically Isolated Lattice Domes using Amplification Factors

    IASS Symposium 2009  2009 

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  • VIBRATION TESTS OF ARCH STRUCTURES SUPPORTED BY SUBSTRUCTURES WITH VARIOUS NATURAL PERIODS AND MASS SUBJECTED TO HORIZONTAL EARTHQUAKE MOTIONS

    Sixth International Conference on Urban Earthquake Engineering  2009 

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  • SHAPE OPTIMIZATION OF UNIDIRECTIONAL FREE SURFACE SHELLS SUBJECTED TO STRONG WIND

    Sixth International Conference on Urban Earthquake Engineering  2009 

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    Presentation type:Poster presentation  

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  • VIBRATION TESTS OF ARCH STRUCTURES SUPPORTED BY SUBSTRUCTURES WITH VARIOUS NATURAL PERIODS AND MASS SUBJECTED TO HORIZONTAL EARTHQUAKE MOTIONS

    Sixth International Conference on Urban Earthquake Engineering  2009 

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  • SHAKING TABLE TESTS OF CYLINDRICAL LATTICE SHELL ROOFS SUBJECTED TO HORIZONTAL EARTHQUAKE MOTIONSWITH ARBITRARY DIRECTION

    The 9th Asian Pacific Conference on Shell and Spatial Structures  2009 

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  • Seismic Response Evaluation of Lattice Roofs with Substructures

    Sixth International Conference on Urban Earthquake Engineering  2009 

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  • 鞍型HPラチスシェルの座屈荷重評価

    日本建築学会大会学術講演会(東北)  2009 

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  • Seismic Response Evaluation of Low-to-High Rise Lattice Domes

    The 9th Asian Pacific Conference on Shell and Spatial Structures  2009 

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  • 屋根型円筒ラチスシェルの地震応答性状に及ぼす下部構造質量および屋根固有周期の影響

    日本建築学会大会学術講演会(東北)  2009 

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  • 断面設計された二層立体ラチスドームの有効強度を用いた座屈耐力評価

    日本建築学会大会学術講演会(東北)  2009 

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  • 制振機構を有する屋根型円筒ラチスシェルの地震応答実験 その2 制振機構による地震応答の低減効果

    日本建築学会大会学術講演会(東北)  2009 

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  • EFFECTS OF NATURAL PERIOD AND MASS OF SUBSTRUCTURES ON SEISMIC RESPONSES OF ARCH STRUCTURES SUBJECTED TO HORIZONTAL MOTIONS

    IASS 2008  2008 

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  • SEISMIC RESPONSE EVALUATION OF HIGH-RISE LATTICE DOMES WITH SUBSTRUCTURES USING AMPLIFICATION FACTORS

    IASS 2008  2008 

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  • 直方体形状の建物に取り付く大庇に作用する風荷重の特性

    日本建築学会大会学術講演梗概集  2008 

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  • 鞍型HPラチスシェルの弾性座屈性状

    日本建築学会大会学術講演梗概集  2008 

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  • 三次元流体解析にマルチグリッド法を用いた強風を受ける円筒屋根面の形状最適化

    日本建築学会大会学術講演梗概集  2008 

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  • 接合部特性を考慮した木質単層スペースフレームの力学性状 その2 接合部特性の違いが単層ドーム構造の力学性状に及ぼす影響

    日本建築学会大会学術講演梗概集  2008 

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  • 接合部特性を考慮した木質単層スペースフレームの力学性状 その1 木質構造のモデル化と接合部特性算定式の導出

    日本建築学会大会学術講演梗概集  2008 

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  • SEISMIC RESPONSE EVALUATION OF HIGH-RISE LATTICE DOMES WITH SUBSTRUCTURES USING AMPLIFICATION FACTORS

    IASS 2008  2008 

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  • EFFECTS OF NATURAL PERIOD AND MASS OF SUBSTRUCTURES ON SEISMIC RESPONSES OF ARCH STRUCTURES SUBJECTED TO HORIZONTAL MOTIONS

    IASS 2008  2008 

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  • 屋根部材の塑性化を考慮した二層ラチスドームの応答加速度評価

    日本建築学会大会学術講演梗概集  2008 

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  • ライズの高い支持架構付ラチスドームの地震応答評価 その2 周期比・質量比の地震応答特性に与える影響

    日本建築学会大会学術講演梗概集  2008 

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  • 弾塑性制振架構で支持された屋根型円筒ラチスシェルの地震応答評価

    日本建築学会大会学術講演梗概集  2008 

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  • 下部構造との固有周期比及び質量比を変化させたアーチ構造物の地震応答実験

    日本建築学会大会学術講演梗概集  2008 

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  • 任意方向地震動を受ける屋根型円筒ラチスシェルの振動実験 その2 入力方向が応答性状に与える影響と応答評価

    日本建築学会大会学術講演梗概集  2008 

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  • 任意方向地震動を受ける屋根型円筒ラチスシェルの振動実験 その1 実験概要,自由振動特性及び地震応答性状

    日本建築学会大会学術講演梗概集  2008 

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  • HP型サスペンション膜屋根に作用する風圧力の性状と屋根面の風応答 その2 屋根面の風応答

    日本建築学会大会学術講演梗概集  2008 

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  • HP型サスペンション膜屋根に作用する風圧力の性状と屋根面の風応答 その1 実験概要および屋根面に作用する風圧力の性状

    日本建築学会大会学術講演梗概集  2008 

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  • ライズの高い支持架構付ラチスドームの地震応答評価 その1 応答増幅率及び応答加速度分布の評価

    日本建築学会大会学術講演梗概集  2008 

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  • ドーム屋根面周辺流れの三次元非圧縮性粘性流体解析へのマルチグリッド法の適用 その1 マルチグリッド法による前処理行列の導出

    日本建築学会大会学術講演梗概集  2007 

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  • A Prediction Method of Dynamic Collapse Behavior of Single-layer Latticed Domes Subjected to Horizontal Earthquake Motions

    IASS 2007  2007 

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  • フラッタを生じる旗に作用する風荷重測定 その2 重量比およびアスペクト比が風荷重に与える影響

    日本建築学会大会学術講演梗概集  2007 

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  • Seismic Response Evaluation of Lattice Roofs Supported by Multistory Substructures

    IASS 2007  2007 

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  • Application of Multigrid Method to Three-dimensional Incompressible Viscous Flow Analysis Around Domes

    IASS 2007  2007 

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  • Application of Multigrid Method to Three-dimensional Incompressible Viscous Flow Analysis Around Domes

    IASS 2007  2007 

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  • A Prediction Method of Dynamic Collapse Behavior of Single-layer Latticed Domes Subjected to Horizontal Earthquake Motions

    IASS 2007  2007 

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  • Seismic Response Evaluation of Lattice Roofs Supported by Multistory Substructures

    IASS 2007  2007 

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  • アーチ構造物の地震応答に関する模型実験 その1 実験装置及びアーチ構造物の自由振動特性

    日本建築学会大会学術講演梗概集  2007 

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  • ローラー支持された二層立体ラチスドームの静的弾塑性座屈性状

    日本建築学会大会学術講演梗概集  2007 

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  • 多層架構で支持されたラチスシェル構造の地震応答評価 その1 重量の大きい1層架構に支持された場合

    日本建築学会大会学術講演梗概集  2007 

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  • アーチ構造物の地震応答に関する模型実験 その2 アーチ構造物の地震応答性状

    日本建築学会大会学術講演梗概集  2007 

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  • 多層架構で支持されたラチスシェル構造の地震応答評価 その2 多層架構に支持された場合

    日本建築学会大会学術講演梗概集  2007 

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  • 水平地震動を受ける単層ラチスドームの崩壊挙動予測 その2 入力加速度の違いが動的応答に及ぼす影響および崩壊挙動予測

    日本建築学会大会学術講演梗概集  2007 

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  • 水平地震動を受ける単層ラチスドームの崩壊挙動予測 その1 動的崩壊性状

    日本建築学会大会学術講演梗概集  2007 

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  • ドーム屋根面周辺流れの三次元非圧縮性粘性流体解析へのマルチグリッド法の適用 その2 ドーム屋根形状が計算効率に与える影響

    日本建築学会大会学術講演梗概集  2007 

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  • 網目形状の異なる二層立体ラチスドームの弾塑性座屈性状 その1 静的弾塑性座屈性状

    日本建築学会大会学術講演会  2006 

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  • 等価な静的地震荷重による骨組膜屋根構造物の応答評価 その1:格子状シングルレイヤードームへの適用例

    日本建築学会大会学術講演会  2006 

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  • 桁行方向に地震動を受ける支持架構付き屋根型円筒ラチスシェルの応答評価

    日本建築学会大会学術講演会  2006 

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  • 偏心補剛された平鋼圧縮柱の座屈実験

    日本建築学会大会学術講演会  2006 

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  • フラッタを生じる旗に作用する風荷重測定

    日本建築学会大会学術講演会  2006 

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  • State-of art Report on Seismic Response Estimation of Metal Spatial Structures under Earthquake Motions

    IASS/APCS 2006  2006 

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  • State-of art Report on Seismic Response Estimation of Metal Spatial Structures under Earthquake Motions

    IASS/APCS 2006  2006 

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  • Static and Dynamic Buckling Behavior of Double-layer Latticed Domes with Various Mesh Patterns

    IASS/APCS 2006  2006 

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  • Static and Dynamic Buckling Behavior of Double-layer Latticed Domes with Various Mesh Patterns

    IASS/APCS 2006  2006 

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  • 円筒屋根面風荷重評価のための流体解析へのマルチグリッド法の適用

    日本建築学会大会学術講演会  2006 

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  • 円筒屋根風荷重評価のための流体解析に用いるマルチグリッド法の定式化

    日本建築学会大会学術講演会  2006 

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  • 網目形状の異なる二層立体ラチスドームの弾塑性座屈性状 その2 動的弾塑性座屈性状および耐力評価

    日本建築学会大会学術講演会  2006 

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  • 制振柱脚を用いた自立型トラス架構に関する研究 その1.構造計画およびダンパーの性能実験

    日本建築学会大会学術講演会  2005 

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  • 応答増幅率を用いた支持架構付き屋根型円筒ラチスシェルの地震応答評価 その1 応答スペクトル法による分析及び加速度応答予測式の誘導

    日本建築学会大会学術講演会  2005 

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  • 制振柱脚を用いた自立型トラス架構に関する研究 その3.動的解析による応答低減効果の検証

    日本建築学会大会学術講演会  2005 

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  • 応答増幅率を用いた支持架構付き中規模ラチスドームの地震応答評価 その1 弾性域における予測式の妥当性,適用範囲の検証

    日本建築学会大会学術講演会  2005 

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  • 応答増幅率を用いた支持架構付き屋根型円筒ラチスシェルの地震応答評価 その2 簡易モデルによる応答増幅率の誘導

    日本建築学会大会学術講演会  2005 

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  • 応答増幅率を用いた支持架構つき中規模ラチスドームの地震応答評価 その2 弾塑性架構で支持されたラチスドームへの予測式の適用

    日本建築学会大会学術講演会  2005 

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  • Seismic Response Evaluation of Cylindrical Lattice Roofs with Substructures Using Amplification Factors

    IASS2005  2005 

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  • Seismic Response Evaluation of Latticed Domes with Elasto-Plastic Substructures Using Amplification Factors

    IASS2005  2005 

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  • Seismic Response Evaluation of Cylindrical Lattice Roofs with Substructures Using Amplification Factors

    IASS2005  2005 

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  • Seismic Response Evaluation of Latticed Domes with Elasto-Plastic Substructures Using Amplification Factors

    IASS2005  2005 

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  • 通信鉄塔の耐震補強に関する研究 その4.時刻歴応答解析による鉄塔の耐震性能評価

    日本建築学会大会学術講演会  2005 

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  • 制振柱脚を用いた自立型トラス架構に関する研究 その2.実大トラス実験

    日本建築学会大会学術講演会  2005 

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  • 応答スペクトル法による中規模ラチスドームの地震応答評価 その1 ドームの面外剛性および下部構造剛性が卓越モードに与える影響

    日本建築学会大会学術講演会  2004 

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  • 網目形状の異なる二層立体ラチスシェルの弾塑性座屈性状

    日本建築学会大会学術講演会  2004 

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  • 可変複合手法を用いた強風中のシェル屋根面の形状最適化

    日本建築学会大会学術講演会  2004 

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  • 水平方向ハーフサイン波を受ける単層ラチスドームの動的座屈性状

    日本建築学会大会学術講演会  2004 

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  • Response Evaluation of Medium-Span Lattice Domes with Substructures using Response Spectrum Analysis

    IASS2004  2004 

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  • Dynamic Buckling Behavior of Single Layer Lattice Domes Subjected to Vertical and Horizontal Step Waves

    IASS 2004  2004 

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  • Response Evaluation of Medium-Span Lattice Domes with Substructures using Response Spectrum Analysis

    IASS2004  2004 

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  • Dynamic Buckling Behavior of Single Layer Lattice Domes Subjected to Vertical and Horizontal Step Waves

    IASS 2004  2004 

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  • 応答スペクトル法による中規模ラチスドームの地震応答評価 その2 卓越モードが限定されたドームにおける加速度応答予測式の誘導手法

    日本建築学会大会学術講演会  2004 

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  • 履歴型制振ブレースを有する立体トラス架構の地震応答性状

    日本建築学会大会学術講演会  2003 

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  • Dynamic Buckling Behavior of Single Layer Lattice Domes Subjected to Horizontal Step Wave

    IASS-APCS2003  2003 

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  • Seismic Response Analysis of Single Layer Lattice Domes with Substructure

    IASS-APCS2003  2003 

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  • Seismic Response Analysis of Single Layer Lattice Domes with Substructure

    IASS-APCS2003  2003 

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  • 水平地震動を受ける単層ラチスドームの応答加速度評価

    日本建築学会大会学術講演会  2003 

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  • 鉛直および水平方向ステップ波を受ける剛接合単層ラチスドームの動的座屈性状

    日本建築学会大会学術講演会  2003 

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  • Dynamic Buckling Behavior of Single Layer Lattice Domes Subjected to Horizontal Step Wave

    IASS-APCS2003  2003 

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  • Dynamic Behavior of Rigidly Jointed Single-Layer Lattice Domes Subjected to Vertical Earthquake Motions

    Fifth International Conference on Space Structures  2002 

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  • 応答スペクトル解析法を用いた単層ラチスドームの地震応答解析

    日本建築学会大会学術講演会  2002 

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  • 線形座屈荷重を目的関数とした単層ラチスシェルの形状最適化

    日本建築学会大会学術講演会  2002 

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  • Shape Optimization of Single-Layer Latticed Shells for Maximum Linear Buckling Loads

    Fifth International Conference on Space Structures  2002 

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  • 水平方向ステップ波を受ける剛接合単層ラチスドームの動的座屈性状

    日本建築学会大会学術講演会  2002 

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  • Shape Optimization of Single-Layer Latticed Shells for Maximum Linear Buckling Loads

    Fifth International Conference on Space Structures  2002 

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  • Dynamic Behavior of Rigidly Jointed Single-Layer Lattice Domes Subjected to Vertical Earthquake Motions

    Fifth International Conference on Space Structures  2002 

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  • 上下震動を受ける剛接合単層ラチスドームの応答性状

    日本建築学会大会学術講演会  2001 

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  • 剛接合単層ラチスドームの動的座屈解析 ―その1 入力波形の違いが座屈性状に与える影響

    日本建築学会大会学術講演会  2001 

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  • The Effect of Shock Motion on Dynamic Buckling Behavior of Rigidly Jointed Single Layer Lattice Dome

    IASS2001  2001 

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  • 剛接合単層ラチスドームの動的座屈解析 ―その2 荷重継続時間の違いが座屈性状に与える影響

    日本建築学会大会学術講演会  2001 

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  • The Effect of Shock Motion on Dynamic Buckling Behavior of Rigidly Jointed Single Layer Lattice Dome

    IASS2001  2001 

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  • Dynamic Buckling Analysis of Rigidly Jointed Single-Layer Latticed Domes

    IASS-IACM2000  2000 

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  • 剛接合単層ラチスドームの動的座屈性状に関する研究 (その3 パネル数の違いが座屈性状に与える影響)

    日本建築学会大会学術講演会  2000 

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  • Dynamic Buckling Analysis of Rigidly Jointed Single-Layer Latticed Domes

    IASS-IACM2000  2000 

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  • 剛接合単層ラチスドームの動的座屈性状に関する研究 (その4 部材細長比と荷重継続時間の違いが座屈性状に与える影響)

    日本建築学会大会学術講演会  2000 

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  • H形鋼を用いた単層トラス構造の力学性状 その2(種々の接合形式を有する部材の耐力の確認)

    日本建築学会大会学術講演会  1999 

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Awards

  • 東工大工系若手奨励賞

    2008  

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    Country/Region:Japan

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  • Tokyo Tech Young Investigator Engineering Award

    2008  

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  • 日本建築学会奨励賞

    2006  

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    Country/Region:Japan

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  • Encouragement Prize of AIJ

    2006  

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  • IASS Hangai Prize 2003

    2003  

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Research Projects

  • ラチスシェル屋根面に制振装置を設置する耐震改修手法とその応答評価手法の構築

    Grant number:23K04128  2023.4 - 2026.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    熊谷 知彦

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    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

    本研究の目的は,空間構造物の中でもラチスシェル構造を対象に,屋根構造に制振装置を設置した場合の設計時の想定を超える地震動までを対象とした応答低減効果の解明,さらにはその手法を用いた耐震改修手法および応答評価手法の構築である。学校体育館を含むスポーツ施設やイベントスペース等の屋根構造として使用されるラチスシェル構造は,発生が予測されている大地震や近年多発している台風等の災害時には,防災拠点としても使用される建築物である。しかしながら,災害時にも使用可能な状態を維持するための技術であるTMD(Tuned Mass Damper)のような制振装置を屋根面に設置する耐震改修手法ならびに応答低減により得られる耐震性能の向上の評価手法は確立されていない。そこで本研究では,TMDによる制振方法の普及を目指し,設置方法および評価手法を稀に発生する地震動から設計時の想定を超える地震動までを含めて構築する。本研究では研究期間3年間で振動台実験および有限要素法解析により以下のことを明らかにする計画である。
    1) 1/3スケール試験体を用いた振動台実験による応答低減効果の検証,2) 弾塑性地震応答を呈する場合の応答低減効果の分析,3) 1/3スケール試験体による振動台実験の再現解析による分析,4)許容変形評価のための応答の選定および許容変形量の提案,5) 複数パラメータに対する縮小模型を用いた振動台実験による分析6) 弾性~弾塑性応答までを包含する応答評価手法の構築
    令和5年度には,上記1)について実行し,1/3スケール試験体へTMD2機を設置することによる応答低減効果の検証を振動台実験を行い,最大50%の応答低減効果を確認した。また,2)についても屋根型円筒ラチスシェルを対象に数値解析により分析を進め,弾塑性地震応答を呈する場合にも応答低減効果の悪化は殆ど無いことを明らかにした。

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  • Advanced Damage Control Technology in Large Spatial Structures

    Grant number:21H04581  2021.4 - 2025.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

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    Grant amount:\40170000 ( Direct Cost: \30900000 、 Indirect Cost:\9270000 )

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  • 偏心圧縮材を座屈補剛材として用いた新形式の補剛法による耐震改修方法の構築

    Grant number:20K04779  2020.4 - 2023.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    熊谷 知彦

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    Grant amount:\3770000 ( Direct Cost: \2900000 、 Indirect Cost:\870000 )

    本研究の目的は,圧縮軸力を受ける部材の曲げ座屈荷重増大のための偏心圧縮材を補剛材として用いた新形式の座屈補剛による耐震改修方法の開発および接着剤を用いた簡便な補剛材接合方法の構築である。本研究で提案する補剛形式は,補剛の対象となる部材に別の部材(補剛材)を沿わせて材端のみを接着剤で接合するのみで構成可能な形式である。本研究では研究期間3年間で数値解析および座屈実験により以下のことを明らかにする計画である。
    1) 補剛すべき部材である主材と補剛材を軸方向中央部において一体化する機構(変形制御機構)の開発・提案 2) 主材と補剛材の接合方法として接着剤を用いた場合の補剛効果の検討 3) 種々の材料(鋼材,木材等)を使用した場合の補剛効果の検討 4) 外力として軸力・曲げが加わった際の座屈挙動の解明と補剛効果の検証 5) 本補剛形式を構造物に組み込んだ際の雪荷重等に対する座屈性状,地震時挙動の分析 6) 提案補剛形式の座屈補剛効果について体系的にまとめ,本補剛形式の設計手法,既存の部材への耐震補強の方法を提案する
    研究期間1年目の2020年度においては,上記1)について開発・提案を進め,2)のための数値解析による検討および予備実験を実施した。2年目の2021年度においては,2)について2020年度の予備実験結果に基づいた本試験を実施した。具体的には下記の通りである。主材に平鋼,補剛材にベイマツを用いた試験体の接合部に鋼棒を挿入したエポキシ樹脂接着剤による接合方法および具体的な変形制御機構を提案し,主材のみ,本補剛形式,本補剛形式+変形制御機構の3種類の座屈実験を実施し,座屈性状を比較した。その結果,本補剛形式では,主材の座屈荷重に対し,細長比λ=160では3.3倍,λ=120では2.0倍の座屈荷重が得られた。また,変形制御機構を組み込むことで補剛材の変形を制御可能となった。

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  • Seismic Performance Improvement of System Truss Roof Structures for Disaster Shelter

    Grant number:18H01676  2018.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Takeuchi Toru

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    Grant amount:\9360000 ( Direct Cost: \7200000 、 Indirect Cost:\2160000 )

    In 2016 Kumamoto earthquake, roof members of system truss gymnasiums buckled and ruptured, and some of them fell. The system truss is a structural system widely used in gymnasiums in Japan, however, they are designed to be elastic against the design load, and the bearing capacity margin and collapse behavior against large seismic input have not been clarified. In this study, the collapse mechanism of the system truss roof structure supported by RC frames has been clarified through member tests, truss unit tests, partial frame shaking table tests and analysis. In addition, a construction method to prevent the collapse of the entire roof, the introduction of energy absorbing elements into the bearing to reduce the response, and their design method were proposed, followed by researches on immediate risk assessment based on the measurement of point cloud data after the earthquake.

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  • Research on response-control bearings for mitigating earthquake damages of steel roof gymnasia supported by RC frames

    Grant number:15H04075  2015.4 - 2018.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Takeuchi Toru

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    Grant amount:\8190000 ( Direct Cost: \6300000 、 Indirect Cost:\1890000 )

    Numerous steel roof bearings in RC gymnasiums were damaged at the 2011 Tohoku Earthquake. These damages are considered to be mainly due to out-of-plane response of cantilevered RC walls; however, their mechanisms are not clear.
    In this research, complicated response characteristics of these roof and RC walls are made clear. The real scale mock-up experiments of PTFE sliding bearings, friction damper bearings, and rubber sheet bearings are carried out, followed by the shaking table test for seismically isolated roofs. From these results, detailed construction methods for eliminating the damages without strengthening the roof, followed by proposing the evaluation methods. Also the steel roofs supported by seismic isolation bearings are investigated, followed by shaking table tests and response evaluations.

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  • Proposals for Design Method for Vibration Control Devices and Method of Seismic Retrofit for Spatial Structures which aim at Improvement of Response Reduction Effects

    Grant number:24760447  2012.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    KUMAGAI Tomohiko

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    Grant amount:\3380000 ( Direct Cost: \2600000 、 Indirect Cost:\780000 )

    The spatial structures are also used for evacuation facility and disaster prevention base in a time of disaster such as an earthquake or a typhoon. Therefore, the purposes of this study are to propose the design method for vibration control devices for spatial structures. First, the vibration control devices that have high applicability to the spatial structures are selected. As a result, TMD (Tuned Mass Damper) is elected. Next, the response reduction effects of the cylindrical lattice shell roofs which are often used for the roof of gymnasiums subjected to the horizontal or vertical earthquake motions are examined by numerical analyses. Lastly, the evaluation method for response reduction effects for spatial structures with TMDs is proposed and the validity of this method is verified.

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  • Development of Comprehensive Response Control Methods for SpatialStructures Subjected to Earthquake and Wind Excitation

    Grant number:22360223  2010 - 2012

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    OGAWA Toshiyuki, KUMAGAI Tomohiko, TAKEUCHI Toru

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    Grant amount:\8060000 ( Direct Cost: \6200000 、 Indirect Cost:\1860000 )

    This study was performed with the aims of elucidation of response behavior of spatial structures and development of comprehensive response control methods for natural disasters such as earthquakes or typhoon. The response behavior of spatial structures subjected to large earthquake motions or in strong wind was investigated by carrying out the vibration tests, wind tunnel tests and numerical analyses. For the response control methods, in addition to the passive response control, the active response control by feedback control and the method of searching for the forms with minimum response by treating the response control as an optimization problem were examined.

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  • Proposals for Prediction of Collapse Behavior and Response Reduction

    Grant number:21760427  2009 - 2011

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    KUMAGAI Tomohiko

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    Grant amount:\3510000 ( Direct Cost: \2700000 、 Indirect Cost:\810000 )

    The purposes of this study are to investigate the dynamic collapse behavior subjected to earthquake motion and to propose the prediction method of collapse behavior and the response reduction method of spatial structure. First, the dynamic collapse behavior of cylindrical lattice shell roofs which are often used for the roof of gymnasiums is examined by shaking table tests. Next, the control of seismic responses by energy absorption device is attempted so that the structures do not collapsed. Lastly, the response behavior subjected to horizontal bi-directional earthquake motions are investigated by carrying out the shaking table tests and numerical analyses.

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  • Establishment of Comprehensive Disaster Prevention Technology using Energy Absorbing Devices for Spatial Structures

    Grant number:19360247  2007 - 2009

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    OGAWA Toshiyuki, TAKEUCHI Toru, KUMAGAI Tomohiko

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    Grant amount:\9880000 ( Direct Cost: \7600000 、 Indirect Cost:\2280000 )

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  • Proposal for Prediction Method of Dynamic Collapse Behavior of Lattice Shells

    Grant number:18760414  2006 - 2008

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    KUMAGAI Tomohiko

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    Grant amount:\2620000 ( Direct Cost: \2500000 、 Indirect Cost:\120000 )

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  • 単層ラチスドームの動的座屈性状

    JST若手研究者研究推進事業(TOREST) 

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    Grant type:Competitive

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  • Dynamic Buckling Behavior of Single Layer Lattice Domes

    JST Target Oriented Research for Embryonic Science and Technology (TOREST) 

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    Grant type:Competitive

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