Makoto Ohsaki

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Name
Makoto Ohsaki
Affiliation
Kyoto University
Section
Graduate School of Engineering Department of Architecture and Architectual Systems Engineering
Job title
Associate Professor,Associate Professor
Degree
Doctor of Engineering(Kyoto University), Master of Engineering(Kyoto University)

Research Areas

 
 

Academic & Professional Experience

 
1985
 - 
1996
KYOTO UNIVERSITY, RESEARCH ASSOCIATE
 

Education

 
 
 - 
1985
Graduate School, Division of Engineering, Kyoto University
 
 
 - 
1983
Architectural Engineering, Faculty of Engineering, Kyoto University
 

Published Papers

 
Yan Su, Makoto Ohsaki, Yue Wu, Jingyao Zhang
Engineering Structures   198    Nov 2019
© 2019 Elsevier Ltd Reciprocal structure is a special structural system that has a complex form. In this paper, a new numerical method is proposed for form finding and shape optimization of reciprocal structures. Two new parameters, contact point ...
Kazuki Hayashi, Makoto Ohsaki
Advances in Engineering Software   133 12-19   Jul 2019   [Refereed]
© 2019 Elsevier Ltd This paper presents a new efficient tool for simultaneous optimization of topology and geometry of truss structures. Force density method is applied to formulate optimization problem to minimize compliance under constraint on t...
Ma Qing, Ohsaki Makoto, Chen Zhihua, Yan Xiangyu
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES   165 137-147   Jun 2019   [Refereed]
J. Y. Zhang, M. Ohsaki, F. Tsuura
International Journal of Solids and Structures   161 182-192   Apr 2019
© 2018 Elsevier Ltd This paper presents conditions for self-equilibrium as well as super-stability of the truncated regular hexahedral and octahedral tensegrity structures. Their symmetry can be described by octahedral group in group representatio...
Makoto Ohsaki, Makoto Yamakawa, Wenliang Fan, Zhengliang Li
Mechanics Research Communications   97 33-38   Apr 2019   [Refereed]
© 2019 Elsevier Ltd A design method is proposed for reducing the worst value of representative response of structure under random variation of structural parameters. To reduce the computational cost for finding the worst value, the requirement of ...
Toshiaki Kimura, Makoto Ohsaki, Yuki Yamaoka
Journal of Structural and Construction Engineering   84 385-391   Mar 2019
© 2019 Architectural Institute of Japan.All Rights Reserved. Among various methods for seismic retrofit, installation of shear wall composed of light weight blocks to existing frame is an effective approach in view of reduction of construction cos...
Jinglan Cui, Makoto Ohsaki
AIJ Journal of Technology and Design   25 129-134   Feb 2019
© 2019 Architectural Institute of Japan. All Rights Reserved. An approximate design system is developed to design a free-form surface combining developable surfaces. The cost of construction may be reduced using developable surfaces, while maintai...
Ryo Watada, Makoto Ohsaki
AIJ Journal of Technology and Design   25 123-128   Feb 2019
© 2019 Architectural Institute of Japan. All Rights Reserved. Deployable structures are presented using regular 2N -gonal frames, which have 2N bars connected with two types of inclined revolute joints. Series expansion method shows that the frame...
Kentaro Hayakawa, Makoto Ohsaki
Journal of Environmental Engineering (Japan)   84 597-605   Jan 2019
© 2019 Architectural Institute of Japan. All rights reserved. Various methods exist for analysis and design of rigid-foldable origami. However, the crease pattern generated by an existing general method is often too complicated to apply to deploya...
Yoshikazu Sawamoto, Makoto Ohsaki
Journal of Structural and Construction Engineering   84 695-704   Jan 2019
© 2019 Architectural Institute of Japan. All rights reserved. In Tohoku earthquake (March 11, 2011), highrise steel buildings of the Tokyo downtown area shook for a long moment under the influence of long-period ground motion. To prevent damage un...
Tomoshi Miyamura, Makoto Ohsaki, Koichi Kajiwara
Journal of Structural and Construction Engineering   84 39-49   Jan 2019
© 2019 Architectural Institute of Japan. All rights reserved. A high fidelity solid element mesh of a 31 -story super-highrise building frame is generated. A concept of a mesh generator for steel frames using a database of solid element component ...
Jun Fujiwara, Makoto Ohsaki, Hiroyuki Tagawa, Tomoshi Miyamura, Takuzo Yamashita
Journal of Structural and Construction Engineering   84 29-37   Jan 2019
© 2019 Architectural Institute of Japan. All rights reserved. A finite element analysis of a square concrete-filled-tube (CFT) column under cyclic shear-bending loading is conducted. The concrete constitutive model proposed by the authors, which h...
Yunfei Zu, Wenliang Fan, Jingyao Zhang, Zhengling Li, Makoto Ohsaki
Engineering Computations (Swansea, Wales)      Jan 2019
© 2019, Emerald Publishing Limited. Purpose: Conversion of the correlated random variables into independent variables, especially into independent standard normal variables, is the common technology for estimating the statistical moments of respon...
Watada Ryo, Ohsaki Makoto, Kanno Yoshihiro
JAPAN JOURNAL OF INDUSTRIAL AND APPLIED MATHEMATICS   36(1) 177-208   Jan 2019   [Refereed]
Ma Qing, Ohsaki Makoto, Chen Zhihua, Yan Xiangyu
ENGINEERING STRUCTURES   177 331-344   Dec 2018   [Refereed]
Toshiaki Kimura, Makoto Ohsaki, Ryo Okazaki
Journal of Structural and Construction Engineering   83 1445-1454   Oct 2018
© 2018 Architectural Institute of Japan. All rights reserved. This paper presents an optimization method of steel frames for minimizing the top displacement under seismic motions, where the thicknesses of columns, beams and braces are simultaneous...
Tamura Takuya, Ohsaki Makoto, Takagi Jiro
JAPAN ARCHITECTURAL REVIEW   1(4) 419-430   Oct 2018   [Refereed]
Ohsaki Makoto, Kanno Yoshihiro, Yamaoka Yuki
JOURNAL OF MECHANICAL DESIGN   140(10)    Oct 2018   [Refereed]
Liu Heping, Zhang Jingyao, Ohsaki Makoto
MECHANICS RESEARCH COMMUNICATIONS   92 124-130   Sep 2018   [Refereed]
Cui Jinglan, Ohsaki Makoto
JOURNAL OF THE INTERNATIONAL ASSOCIATION FOR SHELL AND SPATIAL STRUCTURES   59(3) 199-214   Sep 2018   [Refereed]
Sakai Yusuke, Ohsaki Makoto
ENGINEERING STRUCTURES   169 55-67   Aug 2018   [Refereed]
Mahendra Kumar Pal, Takuzo Yamashita, Tomoshi Miyamura, Makoto Ohsaki
International Journal of Computational Methods   16(6)    Jun 2018   [Refereed]
© 2018 World Scientific Publishing Company We present a high fidelity numerical simulation technique to analyze the nonlinear behavior of a composite beam under cyclic loading. The analysis is performed by using the in-house software called E-Simu...
Watada Ryo, Ohsaki Makoto
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES   141 78-85   Jun 2018   [Refereed]
見上知広, 見上知広, 大崎純, 田川浩
構造工学論文集 B   64 55‐61   Mar 2018
津田勢太, 中原嘉之, 大崎純
日本建築学会技術報告集   24(56) 111‐116   Feb 2018
Ohsaki Makoto, Yamakawa Makoto
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION   57(2) 595-603   Feb 2018   [Refereed]
Liu Heping, Zhang Jingyao, Ohsaki Makoto
COMPOSITE STRUCTURES   184 306-313   Jan 2018   [Refereed]
Makoto Ohsaki
Journal of Engineering Mechanics   43(11)    Nov 2017   [Refereed]
Zhou Qingyu, Fan Wenliang, Li Zhengliang, Ohsaki Makoto
JOURNAL OF ENGINEERING MECHANICS   143(11)    Nov 2017   [Refereed]
藤田慎之輔, 寒野善博, 大崎純
日本建築学会構造系論文集   (738) 1299‐1307   Aug 2017
CUI Jinglan, 大崎純, 中村奎吾
日本建築学会構造系論文集   (737) 1137‐1143   Jul 2017
Makoto Ohsaki, Kazuki Hayashi
Structural and Multidisciplinary Optimization   56(5) 1-12   May 2017   [Refereed]
© 2017 Springer-Verlag Berlin HeidelbergA new method of simultaneous optimization of geometry and topology is presented for plane and spatial trusses. Compliance under single loading condition is minimized for specified structural volume. The diff...
Ohsaki Makoto, Nagahara Hajime, Ikeda Tetsuo, Taniguchi Rin-ichiro
THIRTEENTH INTERNATIONAL CONFERENCE ON QUALITY CONTROL BY ARTIFICIAL VISION 2017   10338    2017   [Refereed]
藤田 慎之輔, 大崎 純, 關 和也
日本建築学会構造系論文集   81(730) 2091-2099   Dec 2016
Makoto Ohsaki, Seita Tsuda, Toma Hasegawa
Engineering Structures   126 667-674   Nov 2016   [Refereed]
© 2016 Elsevier LtdAn optimization approach is presented for design of a tetrahedral tuned mass damper called TD-TMD for three-directional seismic response reduction of structures. The mass damper consists of a viscous damper and a mass connected ...
FUKUSHIMA Kotaro, OHSAKI Makoto, MIKAMI Tomohiro, MIYAZU Yuji
Journal of Structural and Construction Engineering (Transactions of AIJ)   81(728) 1657-1664   Oct 2016
 Seismic performance of an existing building frame can be improved using various devices such as shear walls, shear dampers, buckling restrained brace, base isolator, etc. If we construct shear walls using latticed blocks, we can have much ve...
CUI Jinglan, ZHOU Guangchun, OHSAKI Makoto
Journal of Structural and Construction Engineering (Transactions of AIJ)   81(728) 1761-1769   Oct 2016
 Owing to recent progress of computational methods and manufacturing technology, free-form shells are widely used for designing complex shapes of long-span roof structures. However, in most of studies on design and optimization of free-form s...
TAKAGI Jiro, OHSAKI Makoto, ISHIKAWA Shiori
Journal of Structural and Construction Engineering (Transactions of AIJ)   81(728) 1743-1751   Oct 2016
 There are two major types of lateral frame systems in steel buildings, which are space frame system (SFS) and perimeter frame system (PFS). Moment connections are used in most of beam-to-column connections in SFS, while they are limitedly us...
Makoto Ohsaki, Seita Tsuda, Yuji Miyazu
International Journal of Solids and Structures   88-89 68-78   Jun 2016   [Refereed]
© 2016 Elsevier Ltd. All rights reserved.A method is presented for generating linkage mechanisms consisting of frame members. A quadratic programming problem is solved to obtain an infinitesimal mechanism allowing a hinge rotating about an axis in...
Yuji Miyazu, Makoto Ohsaki, Seita Tsuda
Science China Technological Sciences   59(6) 861-861   Jun 2016   [Refereed]
© 2016, Science China Press and Springer-Verlag Berlin Heidelberg.A flexible supporting structure that reduces seismic response of an arch is proposed. Topology and cross-sectional areas of the supporting structure modeled as a truss structure are...
山川誠, 大崎純
構造工学論文集 B   62 381-386   Mar 2016
Jingyao Zhang, Makoto Ohsaki
Journal of Structural and Construction Engineering   81 71-77   Jan 2016
For the form-finding of complex tensegrity structures, such as tensegrity arches as well as tensegrity towers that are considered in this study, we make use of Dynamic Relaxation Method (DRM) to find their configurations at the self-equilibrium st...
M. Ohsaki, T. Miyamura, J. Y. Zhang
CMES - Computer Modeling in Engineering and Sciences   111 303-333   Jan 2016
© 2016 Tech Science Press. A simple constitutive model, called semi-implicit model, for cyclic loading is proposed for steel materials used for structures such as building frames in civil engineering. The constitutive model is implemented in the E...
Makoto Ohsaki, Seita Tsuda, Yuji Miyazu
International Journal of Solids and Structures      Dec 2015
© 2016.A method is presented for generating linkage mechanisms consisting of frame members. A quadratic programming problem is solved to obtain an infinitesimal mechanism allowing a hinge rotating about an axis in arbitrarily inclined direction. T...
見上知広, 見上知広, 大崎純, 大崎純, 福島功太郎
日本建築学会構造系論文集   (715) 1427-1434   Sep 2015
高木次郎, 大崎純
日本建築学会構造系論文集   (715) 1469-1478   Sep 2015
Yamakawa Makoto, Nihei Mitsuki, Tatibana Masahiko, Hukazawa Kyouzou, Ohsaki Makoto, Nakamura Takuzo, Yamanouchi Hiroyuki
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY   29(4) 1465-1472   Apr 2015   [Refereed]
M. Ohsaki, J. Y. Zhang
International Journal of Solids and Structures      Mar 2015
© 2015 Elsevier Ltd.An optimization approach is presented for form-finding of tensegrity structures. It is shown that various equilibrium shapes can be easily found by solving a forced-deformation analysis problem formulated as a minimization prob...
Jiro Takagi, Makoto Ohsaki
Journal of Structural and Construction Engineering   80 1469-1478   Jan 2015
Structural characteristics of standard steel office buildings are investigated. Buildings are designed in two types of lateral resisting systems, which are space frame system (SFS) and perimeter frame system (PFS). Moment resisting connections are...
Tomohiro Mikami, Tomohiro Mikami, Makoto Ohsaki, Makoto Ohsaki, Kotaro Fukushima
Journal of Structural and Construction Engineering   80 1427-1434   Jan 2015
FRP blocks are effectively used for reduction of cost and period of time for seismic retrofit of building frames, because they can be manufactured in plants and attached to the existing frame easily. However, in the current process of retrofit, th...
Makoto Ohsaki, Tomoshi Miyamura, Tomoshi Miyamura, Masayuki Kohiyama, Takuzo Yamashita, Masashi Yamamoto, Naohiro Nakamura
Earthquake Engineering and Structural Dynamics   44(11) 1881-1898   Jan 2015   [Refereed]
© 2015 John Wiley & Sons, Ltd.Finite element analysis is carried out for a building frame supported by laminated rubber bearings to simultaneously investigate global displacement and local stress responses under seismic excitation. The frame membe...
Tomoshi Miyamura, Takuzo Yamashita, Hiroshi Akiba, Makoto Ohsaki
Earthquake Engineering and Structural Dynamics   44(9) 1449-1469   Jan 2015   [Refereed]
© 2014 John Wiley & Sons, Ltd.Dynamic finite element analyses of a four-story steel building frame modeled as a fine mesh of solid elements are performed using E-Simulator, which is a parallel finite element analysis software package for precisely...
YAMASHITA TAKUZO, OSAKI MAKOTO, KOHIYAMA MASAYUKI, MIYAMURA TOMOSHI, ZHANG JINGYAO, TAGAWA HIROYUKI
日本建築学会構造系論文集   (704) 1481-1490   Oct 2014
Makoto Ohsaki, Osamu Iwatsuki, Hidekazu Watanabe, Hidekazu Watanabe
Engineering Structures   74 170-179   Sep 2014   [Refereed]
A reverse rocking response is investigated for a steel frame that has flexible base. The mechanism of response reduction is first investigated using a simple flexible base model consisting of truss elements. It is demonstrated that the roof displa...
Rie Kohta, Makoto Yamakawa, Naoki Katoh, Yoshikazu Araki, Makoto Ohsaki
Journal of Structural and Construction Engineering   79 583-592   Jan 2014
The Truss Topology Design (TTD) problem deals with the selection of optimal configuration for pin-jointed trusses, in particular, optimization of the connectivity of the nodes by the members, in which volume and/or compliance are minimized. In gen...
Takuzo Yamashita, Makoto Ohsaki, Masayuki Kohiyama, Tomoshi Miyamura, Tomoshi Miyamura, Jingyao Zhang, Hiroyuki Tagawa
Journal of Structural and Construction Engineering   79 1481-1490   Jan 2014
Modeling and numerical simulation techniques for performing a detailed finite element analysis of a composite beam are presented. The finite element analysis is performed using E-Simulator, which is under development at the Hyogo Earthquake Engine...
Makoto Ohsaki, Yoshihiro Kanno, Seita Tsuda
Structural and Multidisciplinary Optimization   50(6) 945-956   Jan 2014   [Refereed]
© 2014, Springer-Verlag Berlin Heidelberg. A simple systematic approach is presented for designing a spatial link mechanism with partially rigid joints. A linear programming (LP) problem to find an infinitesimal mechanism that maximizes the output...
FINITE ELEMENT ANALYSIS OF DAMPING MECHANISM OF AUTOCLAVED LIGHTWEIGHT AERATED CONCRETE PANELS FOR EXTERIOR WALLS OF STEEL STRUCTURES
Kohiyama Masayuki, Ohsaki Makoto, Miyamura Tomoshi, Yamashita Takuzo
11TH WORLD CONGRESS ON COMPUTATIONAL MECHANICS; 5TH EUROPEAN CONFERENCE ON COMPUTATIONAL MECHANICS; 6TH EUROPEAN CONFERENCE ON COMPUTATIONAL FLUID DYNAMICS, VOLS II - IV   2229-2236   2014   [Refereed]
M. Ohsaki, S. Tsuda, H. Watanabe
Engineering Structures   56 910-918   Nov 2013
An optimization approach is presented for a retractable structure consisting of bistable compliant mechanism. The structure is modeled using truss and beam elements, and snapthrough behavior is utilized to generate large deformation under small in...
Junki Nozoe, Makoto Ohsaki, Hidekazu Watanabe
Journal of Structural and Construction Engineering   78 1247-1252   Jul 2013
An optimization approach is presented for improving energy dissipation capacity of a shear-type steel damper consisting of a low-yield-point steel panel which is subjected to cyclic deformation. A general purpose finite element software package is...
Seita Tsuda, Makoto Ohsaki, Shohei Kikugawa, Yoshihiro Kanno
Journal of Structural and Construction Engineering   78 791-798   Apr 2013
A method is presented for stability analysis and finding mechanisms of frames with partially rigid connections. Equilibrium equations are formulated with respect to the reduced vector of member-end forces, for which linear constraints are assigned...
M. Ohsaki, J. Y. Zhang
Journal of the International Association for Shell and Spatial Structures   54 27-37   Mar 2013
A new approach is presented for evaluating seismic responses of arch-type long-span structures. The responses are estimated using a series of pushover analyses utilizing multiple load patterns as linear combinations of dominant modes. The represen...
Shinnosuke Fujita, Makoto Ohsaki
Journal of Structural and Construction Engineering   78 495-502   Mar 2013
A method is presented for shape optimization of latticed shells defined by parametric surfaces. The latticed shells with rectangular and triangular grids are optimized for maximum stiffness (minimum strain energy) and constructability (uniform mem...
Makoto Yamakawa, Makoto Ohsaki, Eisuke Mitsuda
Journal of Structural and Construction Engineering   78 91-99   Jan 2013
Design problems with transient dynamic elasto-plastic analysis exhibit noisy and nonsmooth responses with respect to their design parameters. This leads to situations in which some derivatives may be inaccurate and/or computationally expensive to ...
J. Y. Zhang, M. Ohsaki
Journal of the Mechanics and Physics of Solids   60 1757-1770   Oct 2012
This paper presents analytical conditions of self-equilibrium and super-stability for the regular truncated tetrahedral tensegrity structures, nodes of which have one-to-one correspondence to the tetrahedral group. These conditions are presented i...
M. Ohsaki, T. Nakajima
Journal of Constructional Steel Research   75 38-44   Aug 2012
An optimization method is presented for design of an eccentrically braced frame (EBF), which is used as a passive control device for seismic design of building frames. The link member between the connections of beams and braces of EBF is reinforce...
Makoto Ohsaki, Masahiko Katsura
Structural and Multidisciplinary Optimization   46(1) 27-39   Jul 2012   [Refereed]
A random sampling approach is presented for worst-case design of structures. Uncertainties are considered in structural and material parameters, which are assumed to exist in intervals with prescribed upper and lower bounds. Constraints are given ...
Makoto Ohsaki, Jingyao Zhang, Isaac Elishakoff
Journal of Applied Mechanics, Transactions ASME   79(2)    Apr 2012   [Refereed]
Properties of Pareto optimal solutions considering bounded uncertainty are first investigated using an illustrative example of a simple truss. It is shown that the nominal values of the Pareto optimal solutions considering uncertainty are slightly...
Seita Tsuda, Makoto Ohsaki
Journal of Structural and Construction Engineering   77 379-387   Mar 2012
A new type of mass damper is presented for passive seismic response control of spatial structures subjected to bi-directional ground motions. The mass damper consists of a three-degree-of-freedom compliant mechanism with a mass, three springs and ...
M. Ohsaki, T. Nakajima, J. Fujiwara, F. Takeda
Engineering Structures   33 3620-3627   Dec 2011
A method is presented for configuration optimization of frames that have specified properties on nodal displacements, stresses, and reaction forces against static loads. The conventional ground structure approach is first used for topology optimiz...
J. Y. Zhang, M. Ohsaki
Computers and Structures   89 2361-2368   Dec 2011
This study deals with the problem of identifying the member forces in a prestressed pin-jointed structure. For the purpose of evaluation of the identification accuracy, we first present the formulation of identification error, where measurement er...
Ryo Watada, Ryo Watada, Makoto Ohsaki, Makoto Ohsaki, Yoshihiro Kanno
Structural and Multidisciplinary Optimization   43(4) 459-471   Apr 2011   [Refereed]
Uniqueness and symmetry of solution are investigated for topology optimization of a symmetric continuum structure subjected to symmetrically distributed loads. The structure is discretized into finite elements, and the compliance is minimized unde...
Yoshihiro Kanno, Makoto Ohsaki
Computer Methods in Applied Mechanics and Engineering   200(9-12) 1176-1185   Feb 2011   [Refereed]
This paper presents a non-interior point method for solving frictionless contact problems in large deformations, where we solve the problems in an incremental path-following method from warm start. We propose a novel reformulation of the nonlinear...
Shinnosuke Fujita, Shinnosuke Fujita, Makoto Ohsaki, Makoto Ohsaki
International Journal of Space Structures   25 143-157   Sep 2010
A new approach is proposed for shape optimization of shells, where the requirements on geometrical properties, constructability, and mechanical performance are simultaneously considered in the problem formulation. The surface shape is modeled usin...
Tsuyoshi Hikino, Makoto Ohsaki, Kazuhiko Kasai, Motohide Tada, Masayoshi Nakashima
Journal of Structural and Construction Engineering   75(655) 1717-1726   Sep 2010
A full-scale collapse test of a four-story moment resisting frame was conducted in September 2007 at the E-Defense shake table facility. A blind analysis contest was organized for the simulation of incipient collapse response of the frame to stimu...
Yuko Shimada, Keiichiro Suita, Satoshi Yamada, Yuichi Matsuoka, Motohide Tada, Makoto Ohsaki, Kazuhiko Kasai
Journal of Structural and Construction Engineering   75 1351-1360   Jul 2010
A shaking table test of full-scale 4-story building was conducted at E-Defense in order to evaluate the structural and functional performances of a steel frame not only under design level but also under ground motion over design level. This paper ...
Tomoshi Miyamura, Yoshihiro Kanno, Makoto Ohsaki
International Journal for Numerical Methods in Engineering   81(6) 701-727   Feb 2010   [Refereed]
In the present paper, a solution scheme is proposed for frictionless contact problems of linear elastic bodies, which are discretized using the finite element method with lower order elements. An approach combining the interior-point method and th...
J. Y. Zhang, J. Y. Zhang, S. D. Guest, R. Connelly, M. Ohsaki
International Journal of Solids and Structures   47 1-9   Jan 2010
This paper presents conditions for self-equilibrium and super stability of dihedral 'star' tensegrity structures, based on their dihedral symmetry. It is demonstrated that the structures are super stable if and only if they have an odd number of s...
木下 拓也, 大崎 純
Journal of structural and construction engineering   75(647) 113-119   Jan 2010
A new concept is presented for seismic isolation system using a compliant mechanism. Optimization approach is utilized for generating a truss structure that has specified equilibrium path, which can be achieved utilizing elastic deformation of a s...
Takuzo Yamashita, Tomohiko Kumagai, Tomoshi Miyamura, Toshiyuki Ogawa, Makoto Ohsaki
Journal of the International Association for Shell and Spatial Structures   50 181-191   Dec 2009
An efficient linear solver using the multigrid (MG) preconditioned conjugate gradient (MGCG) method is proposed for solving the pressure Poisson equation in the finite element analysis of fluid flow around domes under loading wind. These domes hav...
T. Kinoshita, T. Nakajima, M. Ohsaki
Journal of the International Association for Shell and Spatial Structures   50 89-96   Oct 2009
An optimization approach is developed for the design of a new base-isolation device for spatial frames against vertical seismic motions. A method is first presented for optimizing a compliant bar-joint structure that has a nonlinear equilibrium pa...
M. Ohsaki, H. Tagawa, P. Pan
Journal of Constructional Steel Research   65 1511-1519   Jul 2009
Optimal shapes are found for a reduced beam section of a cantilever H-beam subjected to forced cyclic displacement at the free end. The beam is discretized to finite elements, and a commercial software package called ABAQUS is used for elastoplast...
Kiyohiro Ikeda, Makoto Ohsaki, Kentaro Sudo, Toshiyuki Kitada
Structural Engineering and Mechanics   32(1) 167-178   May 2009   [Refereed]
Initial imperfections, such as initial deflection or remaining stress, cause deterioration of buckling strength of structures. The Koiter imperfection sensitivity law has been extended to describe the mechanism of reduction for structures. The ext...
Ryo Watada, Makoto Ohsaki
Journal of Structural and Construction Engineering   74 841-847   May 2009
A linear Mixed Integer programming (MIP) appraoch is presented for topology optimization of trusses with discrete variables under stress contraints. The objective function is the total structural volume. A systematic appraoch is developed for sele...
Shinnosuke Fujita, Makoto Ohsaki
Journal of Structural and Construction Engineering   74 857-863   May 2009
A new approach is proposed for shape optimizatioa of shell structures, where requirements oa the aesfhetic aspect aad the coostructability as well as the structural rationality are simultaneously coosidered in fhe problem formulation. 'F he surfac...
Makoto Ohsaki, Tomoshi Miyamura, Masayuki Kohiyama, Muneo Hori, Hirohisa Noguchi, Hiroshi Akiba, Koichi Kajiwara, Tatsuhiko Ine
Earthquake Engineering and Structural Dynamics   38(5) 635-654   Apr 2009   [Refereed]
A new framework is presented for analysis of dynamic collapse behavior of steel frames using large-scale parallel finite element method based on the domain decomposition method. The analysis software is based on ADVC as a part of the E-Simulator t...
M. Ohsaki, K. Ikeda
International Journal of Non-Linear Mechanics   44 324-336   Apr 2009
Imperfection sensitivity is investigated for a degenerate hilltop branching point, where a degenerate bifurcation point exists at a limit point. A degenerate hilltop branching point is important as it is a byproduct of optimization of shallow shel...
UCHIDA Atsushi, OHSAKI Makoto, ZHANG Jingyao
Journal of structural engineering. B   55 49-56   Mar 2009
A new approach to determination of equivalent static seismic loads is presented for evaluating peak seismic responses of spatial structures. The responses are estimated by series of pushover analyses considering possible phase differences in the d...
YAMASHITA Takuzo, KUMAGAI Tomohiko, OGAWA Toshiyuki, MIYAMURA Tomoshi, OHSAKI Makoto
Journal of structural and construction engineering   74(636) 297-304   Feb 2009
Shape optimization of shell roofs subjected to strong wind is carried out to minimize the maximum vertical displacement. The three dimensional (3D) fluid flow analysis is performed to obtain highly precise dynamic wind load. To reduce the large co...
M. Ohsaki, N. Katoh, T. Kinoshita, S. Tanigawa, D. Avis, I. Streinu
Structural and Multidisciplinary Optimization   37 645-651   Feb 2009
An optimization approach is presented for enumerating pin-jointed bistable compliant mechanisms. In the first stage, the statically determinate trusses with non-crossing members containing a given set of nodes and some pre-defined members are rega...
YOKOSE Motohiko, KANETA Takashi, FURUSAKA Shuzo, HARADA Kazunori, OHSAKI Makoto, OKADA Koji, SHIN Jinho, ARAI Sohsuke, KASHII Hideki, NAKAZONO Katsuki, KATOH Norikazu, TAGAYA Kazuhiko, OHTAKE Yasuhisa
総合論文誌   (7) 93-98   Jan 2009
In a condominium project, the developer is exposed to various types of risk such as claims from the customers, technical problems during construction, and the difficulties in maintenance. In this paper, elementary risk causes are categorized, usin...
J. Y. Zhang, S. D. Guest, M. Ohsaki
International Journal of Solids and Structures   46 1-14   Jan 2009
This paper presents a simple and efficient method to determine the self-equilibrated configurations of prismatic tensegrity structures, nodes and members of which have dihedral symmetry. It is demonstrated that stability of this class of structure...
J. Y. Zhang, S. D. Guest, M. Ohsaki
International Journal of Solids and Structures   46 15-30   Jan 2009
This paper presents analytical formulations for the symmetry-adapted equilibrium, force density and geometrical stiffness matrices for prismatic tensegrity structures with dihedral symmetries. An analytical expression for the infinitesimal mechani...
T. Hagishita, M. Ohsaki
Structural and Multidisciplinary Optimization   37 377-393   Jan 2009
A new method called the growing ground structure method is proposed for truss topology optimization, which effectively expands or reduces the ground structure by iteratively adding or removing bars and nodes. The method uses five growth strategies...
Yoshihiro Kanno, Makoto Ohsaki
International Journal for Numerical Methods in Engineering   77(1) 90-125   Jan 2009   [Refereed]
This paper discusses an optimization-based technique for determining the stability of a given equilibrium point of the unilaterally constrained structural system, which is subjected to the static load. We deal with the three problems in mechanics ...
OHSAKI Makoto
Journal of structural and construction engineering   73(634) 2135-2141   Dec 2008
A single-point local search method is presented as a simplification of the multiobjective tabu search. Some improvements are made to reach the Pareto front within small number of function evaluations. The performance of the proposed method is firs...
Makoto Ohsaki
Journal of Structural and Construction Engineering   73 2135-2141   Dec 2008
A single-point local search method is presented as a simplification of the multiobjective tabu search. Some improvements are made to reach the Pareto front within small number of function evaluations. The performance of the proposed method is firs...
HAGISHITA Takao, OHSAKI Makoto
Journal of structural and construction engineering   73(633) 1959-1965   Nov 2008
A new approach integrating heuristics and nonlinear programming is proposed for topology optimization of discrete structures under stress and local buckling constraints. In the approach, the optimal ground structures are searched by heuristics, an...
T. Hagishita, M. Ohsaki
Computers and Structures   86 1983-1993   Nov 2008
A heuristic method called Scatter Search (SS) is applied to optimize the placement of braces for steel frames with semi-rigid joints. The standard SS is modified such that the hierarchical clustering is used for the update of the solutions needed ...
Takao Hagishita, Makoto Ohsaki
Journal of Structural and Construction Engineering   73 1959-1965   Nov 2008
A new approach integrating heuristics and nonlinear programming is proposed for topology optimization of discrete Structures under stress and local buckling constraints. In the approach, the optimal ground structures are searched by heuristics, an...

Misc

 
Makoto Ohsaki, Tomoshi Miyamura, Masayuki Kohiyama, Takuzo Yamashita, Hiroshi Akiba
Springer Tracts in Mechanical Engineering   19 105-139   Jan 2016
© 2016 Springer International Publishing Switzerland. In this chapter, we present an overview of the E-Simulator for application to seismic response analysis of building structures. Accuracy and computational performance of simulation using the E-...
Makoto Ohsaki
Optimization of Finite Dimensional Structures   1-406   Apr 2016
© 2011 by Taylor and Francis Group, LLC. All rights reserved. Originally developed for mechanical and aeronautical engineering, structural optimization is not so easily applied to civil and architectural engineering, as structures in these fields ...
關和也, 關和也, 大崎純, 宮津裕次
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)   2016 ROMBUNNO.20537   Jul 2016
MIYAZU Yuji, ITOU Akiyasu, SODA Satsuya, OHSAKI Makoto
Summaries of technical papers of annual meeting   (2015) 715-716   Sep 2015
ITOU Akiyasu, MIYAZU Yuji, SODA Satsuya, OHSAKI Makoto
Summaries of technical papers of annual meeting   (2015) 717-718   Sep 2015
山川誠, 大崎純
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)   2015 ROMBUNNO.20164   Jul 2015
山下拓三, 宮村倫司, 大崎純, 小檜山雅之
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)   2015 ROMBUNNO.22621   Jul 2015
伊藤彰保, 宮津裕次, 曽田五月也, 大崎純, 大崎純
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)   2015 ROMBUNNO.21359   Jul 2015
藤田慎之輔, 大崎純
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)   2015 ROMBUNNO.20355   Jul 2015
宮津裕次, 伊藤彰保, 曽田五月也, 大崎純, 大崎純
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)   2015 ROMBUNNO.21358   Jul 2015

Books etc

 
吉村 忍, Hori M. (Muneo), 大崎 純
Springer   2016   ISBN:9783319210476
Zhang Jing Yao, 大崎 純
Springer   2015   ISBN:9784431548126
Makoto Ohsaki
CRC Press   2011   ISBN:9781439820032
Tensegrity Structures: Form, Stability, and Symmetry
Jingyao Zhang and Makoto Ohsaki (Part:Joint Work)
Springer   2015   ISBN:978-4-431-54813-3
Elishakoff Isaac, Makoto Ohsaki
Imperial College Press   2010   ISBN:9781848164772

Conference Activities & Talks

 
山下 拓三, 大崎 純, 宮村 倫司
計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science   May 2016   
田川 浩之, 大崎 純, 山下 拓三, 宮村 倫司, 小檜山 雅之
計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science   May 2016   
Tsuda Seita, Nakahara Yoshiyuki, Ohsaki Makoto
Proceedings of annual research meeting Chugoku Chapter, Architectural Institute of Japan (AIJ)   5 Mar 2016   
Nakahara Yoshiyuki, Tsuda Seita, Ohsaki Makoto
Proceedings of annual research meeting Chugoku Chapter, Architectural Institute of Japan (AIJ)   5 Mar 2016   
FUJITA Shinnosuke, OHSAKI Makoto
Summaries of technical papers of annual meeting   4 Sep 2015   
YAMAKAWA Makoto, OHSAKI Makoto
Summaries of technical papers of annual meeting   4 Sep 2015   
MIYAZU Yuji, ITOU Akiyasu, SODA Satsuya, OHSAKI Makoto
Summaries of technical papers of annual meeting   4 Sep 2015   
ITOU Akiyasu, MIYAZU Yuji, SODA Satsuya, OHSAKI Makoto
Summaries of technical papers of annual meeting   4 Sep 2015   
YAMASHITA Takuzo, MIYAMURA Tomoshi, OHSAKI Makoto, KOHIYAMA Masayuki
Summaries of technical papers of annual meeting   4 Sep 2015   
伊藤彰保, 宮津裕次, 曽田五月也, 大崎純, 大崎純
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)   20 Jul 2015   
山川誠, 大崎純
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)   20 Jul 2015   
山下 拓三, 宮村 倫司, 大崎 純
計算工学講演会論文集 Proceedings of the Conference on Computational Engineering and Science   Jun 2015   
Nakahara Yoshiyuki, Tsuda Seita, Ohsaki Makoto
Proceedings of annual research meeting Chugoku Chapter, Architectural Institute of Japan (AIJ)   7 Mar 2015   
Tomohiro Mikami, Makoto Ohsaki, Kotaro Fukusfflma
IABSE Conference, Nara 2015: Elegance in Structures - Report   1 Jan 2015   
A shape optimization approach is presented for latticed blocks that are assembled as a wall used for seismic retrofit of building frames. The existing beams and columns, as well as the members in blocks, are modeled using beam elements. The negati...
HASEGAWA Toma, OHSAKI Makoto, TSUDA Seita
最適化シンポジウム : OPTIS   11 Dec 2014   
An optimization approach is presented for design of a tuned mass damper called TD-TMD for three-directional seismic response reduction of structures. The mass damper consists of a viscous damper and a mass connected by flexible springs. By utilizi...
Ohsaki Makoto
最適化シンポジウム : OPTIS   11 Dec 2014   
TANIGUCHI Yusei, OHSAKI Makoto, YAMAKAWA Makoto
最適化シンポジウム : OPTIS   11 Dec 2014   
A stopping rule is presented for multistart local search for optimum design of building frames. The objective function is the total structural volume, and constraints are given for the stresses and interstory drift angles under static loads. The v...
YAMAKAWA Makoto, OHSAKI Makoto
最適化シンポジウム : OPTIS   11 Dec 2014   
In the practical design process, uncertainty in the parameters should be appropriately taken into account. In particular, our interest focuses on design problems with dynamic analysis under uncertainty. One of the authors presented a worst-case de...
Tsuda Seita, Ohsaki Makoto, Nakahara Yoshiyuki
Summaries of technical papers of annual meeting   12 Sep 2014   
Fukushima Kotaro, Ohsaki Makoto, Mikami Tomohiro
Summaries of technical papers of annual meeting   12 Sep 2014   
HASEGAWA Toma, OHSAKI Makoto, TSUDA Seita
Summaries of technical papers of annual meeting   12 Sep 2014   
TAGUCHI Tetsuto, OHSAKI Makoto, ZHANG Jingyao
Summaries of technical papers of annual meeting   12 Sep 2014   
YAMAKAWA Makoto, OHSAKI Makoto
Summaries of technical papers of annual meeting   12 Sep 2014   
TANIGUCHI Yusei, OHSAKI Makoto, YAMAKAWA Makoto
Summaries of technical papers of annual meeting   12 Sep 2014   
SEKI Kazuya, OHSAKI Makoto, FUJITA Shinnosuke
Summaries of technical papers of annual meeting   12 Sep 2014   
OSAKI MAKOTO, MIYAMURA TOMOSHI, KOHIYAMA MASAYUKI, YAMASHITA TAKUZO, YAMAMOTO MASASHI, NAKAMURA NAOHIRO
計算工学講演会論文集(CD-ROM)   11 Jun 2014   
TANIGUCHI Yusei, OHSAKI Makoto, YAMAKAWA Makoto
Proceedings of annual research meeting Chugoku Chapter, Architectural Institute of Japan (AIJ)   Mar 2014   
SEKI Kazuya, OHSAKI Makoto, FUJITA Shinnosuke
Proceedings of annual research meeting Chugoku Chapter, Architectural Institute of Japan (AIJ)   Mar 2014   
Masayuki Kohiyama, Makoto Ohsaki, Tomoshi Miyamura, Takuzo Yamashita
11th World Congress on Computational Mechanics, WCCM 2014, 5th European Conference on Computational Mechanics, ECCM 2014 and 6th European Conference on Computational Fluid Dynamics, ECFD 2014   1 Jan 2014   
Hidekazu Watanabe, Makoto Ohsaki, Junki Nozoe
Structures Congress 2013: Bridging Your Passion with Your Profession - Proceedings of the 2013 Structures Congress   17 Oct 2013   
Optimization results are presented for improving energy dissipation capacity of passive seismic control devices under cyclic deformation. The locations and thicknesses of the stiffeners, as well as the aspect ratio, of a shear-type hysteretic stee...
ZHANG Jingyao, OHSAKI Makoto
Summaries of technical papers of annual meeting   30 Aug 2013   
IWATSUKI Osamu, OHSAKI Makoto, WATANABE Hidekazu
Summaries of technical papers of annual meeting   30 Aug 2013   
M. Ohsaki, S. Tsuda, N. Sugiyama
Proceedings of the 13th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC 2013   1 Jan 2013   
A new type of mass damper is proposed for three-directional seismic response control of building structures, as well as long-span structures, subjected to multi-component ground motions. The mass damper consists of a viscous damper and a mass conn...
Makoto Ohsaki, Tomoshi Miyamura, Masayuki Kohiyama, Takuzo Yamashita, Masashi Yamamoto, Naohiro Nakamura
ECCOMAS Thematic Conference - COMPDYN 2013: 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Proceedings - An IACM Special Interest Conference   1 Jan 2013   
Seismic response analysis is carried out for a base-isolated frame. The RC-frame members as well as the rubber bearings are discretized into hexahedral finite elements. The material properties of rubber are represented by the Ogden model, and the ...
Tomoshi Miyamura, Makoto Ohsaki, Takuzo Yamashita, Daigoro Isobe, Masayuki Kohiyama
ECCOMAS Thematic Conference - COMPDYN 2013: 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Proceedings - An IACM Special Interest Conference   1 Jan 2013   
Dynamic collapse analyses of a 4-story steel building frame modeled by solid elements are performed using the E-Simulator, which is a parallel finite element analysis software package for civil and building structures. Code verification, calculati...
FUJITA Naoto, OHSAKI Makoto, ZHANG Jingyao
Proceedings of annual research meeting Chugoku Chapter, Architectural Institute of Japan (AIJ)   2013   
SUGIYAMA Nobumasa, OHSAKI Makoto, TSUDA Seita
Proceedings of annual research meeting Chugoku Chapter, Architectural Institute of Japan (AIJ)   2013   
NOZOE Junki, OHSAKI Makoto, WATANABE Hidekazu
Proceedings of annual research meeting Chugoku Chapter, Architectural Institute of Japan (AIJ)   2013   
IWATSUKI Osamu, OHSAKI Makoto, WATANABE Hidekazu
Proceedings of annual research meeting Chugoku Chapter, Architectural Institute of Japan (AIJ)   2013   
WATANABE Hidekazu, OHSAKI Makoto
Summaries of technical papers of annual meeting   12 Sep 2012   
EBIHARA Masashi, OHSAKI Makoto, WATANABE Hidekazu
Proceedings of annual research meeting Chugoku Chapter, Architectural Institute of Japan (AIJ)   Mar 2012   
WATANABE Hidekazu, OHSAKI Makoto
Proceedings of annual research meeting Chugoku Chapter, Architectural Institute of Japan (AIJ)   Mar 2012   
T. Yamashita, T. Miyamura, M. Ohsaki, M. Kohiyama, D. Isobe, K. Onda, M. Hori, J. Y. Zhang, H. Akiba, K. Kajiwara
ECCOMAS Thematic Conference - COMPDYN 2011: 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering: An IACM Special Interest Conference, Programme   26 Oct 2011   
The project of E-Simulator is under way at Hyogo Earthquake Engineering Research Center (E-Defense), which belongs to National Research Institute for Earth Science and Disaster Prevention (NIED), Japan. E-Defense facilitates the world's largest sh...
NAKAJIMA Taku, OHSAKI Makoto
Summaries of technical papers of Annual Meeting Architectural Institute of Japan. C-1, Structures III, Timber structures steel structures steel reinforced concrete structures   20 Jul 2011   
TSUDA Seita, OHSAKI Makoto
Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-1, Structures I, Loads, reliability stress analyses foundation structures shell structures, space frames and membrane structures   20 Jul 2011   
KATSURA Masahiko, OHSAKI Makoto
Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-1, Structures I, Loads, reliability stress analyses foundation structures shell structures, space frames and membrane structures   20 Jul 2011   
YAMASHITA Takuzo
Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-1, Structures I, Loads, reliability stress analyses foundation structures shell structures, space frames and membrane structures   20 Jul 2011   
MIYAMURA Tomoshi
Summaries of technical papers of Annual Meeting Architectural Institute of Japan. B-1, Structures I, Loads, reliability stress analyses foundation structures shell structures, space frames and membrane structures   20 Jul 2011   
NAKAJIMA Taku, OHSAKI Makoto
日本建築学会近畿支部研究報告集. 構造系   25 May 2011   

Research Grants & Projects

 
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(B))
Project Year: 2005 - 2007    Investigator(s): Makoto OHSAKI
1. The shape of the flanges of a cantilever beam has been optimized under monotonic and cyclic forced deflections, where the flanges and web are discretized to shell elements. The objective function to be maximized is the dissipated energy by plas...
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(B))
Project Year: 2001 - 2003    Investigator(s): Makoto OHSAKI
1.An optimization method has been developed far long-span frames supported by cables. The optimal cable forces at the final state are found by solving a mathematical programming problem under constraints on the stresses and displacements due to se...
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(C))
Project Year: 2000 - 2002    Investigator(s): Makoto OHSAKI
1. sensitivity analysis method has been developed for mean-maximum seismic responses of finite dimensional structures considering spatial variation of input motions.2. An optimum design problem has been formulated for minimizing the structural vol...
Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research(基盤研究(B))
Project Year: 1997 - 1998    Investigator(s): Makoto OHSAKI
1. The multiobjective optimization problem of a truss is divided into shape design and stiffness design, and a parametric optimization method has been presented for finding the design that minimizes the dissatisfaction level of a truss which is de...
Optimum Design of Building Structures
Design Methods of Large-Span Structures
Sheape Optimization of Structures