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Personal Info.

Born in Kyoto, 1970.

Education

2002/3/25: Degree of Doctor of Engineering, Kyoto University
1994-1996: Graduate School of Kyoto University
1990-1994: Dept. of Civil Eng., Kyoto University

Work Experience

2017/1/1-Current	Professor, Structural Material Eng. Lab., Dept. of Civil and Earth Resource Engineering, Kyoto University
2014/2/1-2016/12/31	Associate Professor, Structural Dynamics Lab., Dept. of Civil and Earth Resource Engineering, Kyoto University
2006/4/1-2014/3/31	Associate Professor, Dynamics of Foundation Lab., Disaster Prevention Research Institute, Kyoto University
2003/3/24-2004/1/23	Research Fellow, University of California, Berkeley. Worked with Prof. G.L. Fenves about developing a object-oriented software framework for experimental tests with OpenSees. At Prof. Fenves's request I opened the web site for OpenSees Works at Kyoto University.
1996-2006	Research Associate, Faculty of Engineering, Kyoto University

Research Fields

Earthquake Engineering
Structural Engineering
Software Engineering (Object-Oriented technology)

Affiliations

Japan Society of Civil Engineers
Japan Association for Earthquake Engineering
Japan Society of Earthquake Engineering Promotion
Japan Concrete Institute
American Concrete Institute

Selected Papers, Book and Patents

Dissertations

• <Ph.D.> Development of High Seismic Performance RC Piers with Object-Oriented Structural Analysis, Kyoto University, 2002.
• <Master> Fundamental Study on Object-Oriented Approach to Structural Analysis, Kyoto University, 1996.
• <Graduation> Fundamental Study on Inelastic Seismic Response of RC Tall Piers with Hollow Section, Kyoto University, 1994.

Selected Papers

(some papers can be available in PDF format.）

• Kazuhiko Kawashima, Tomohiro Sasaki, Koichi Kajiwara, Hiromichi Ukon, Shigeki Unjoh, Junichi Sakai, Yoshikazu Takahashi, Kenji Kosa, and Masaaki Yabe, Seismic Performance of a Flexural Failure Type Reinforced Concrete Bridge Column Based on E-Defense Excitation，Journal of JSCE A, Vol.65, No.2, 267-285, 2009.
• Y. Takahashi, H. Iemura, S.A. Mahin, and G.L. Fenves, International Distributed Hybrid Simulation of 2-Span Continuous Bridge,Proceedings of 14th World Conference on Earthquake Engineering, China, Paper No. S17-03-002, 2008.
• Yoshikazu Takahashi, Hirokazu Iemura, Steve A. Mahin and Gregory L. Fenves. International Distributed Experiments on Bridge System, Proc. of Structural Congress, ASCE, 2007.
• Hidesada Kanaji, Naoto Suzuki, Hirokazu Iemura, Yoshikazu Takahashi, Tomohiro Mino, Yoshihiko Takada. Shaking table test and analytical study on low friction sliding bearings for deck isolation system (in Japanese), Doboku Gakkai Ronbunshuu A, Vol.62, No.4, pp. 758-771, 2006.
• Hirokazu Iemura, Yoshikazu Takahashi and Naoki Sogabe. Two-level seismic design method using post-yield stiffness and its application to unbonded bar reinforced concrete piers, Journal of Structural Eng./Earthquake Eng., JSCE, Vol.23, No.1, pp.109s-116s, 2006.
• Hirokazu Iemura, Yoshikazu Takahashi, Mulyo Harris Pradono, Pariatmono Sukamdo, and Rudi Kurniawan. Earthquake and tsunami questionnaires in Banda Aceh and surrounding areas, Disaster Prevetionand Management, Vol.15, No.1, pp.21-30, 2006.
• Charles K. Huyck, Masashi Matsuoka, Yoshikazu Takahashi, and T. Thuy Vu, Reconnaissance Technologies Used after the 2004 Niigata Ken Chuetsu, Japan, Earthquake, Earthquake Spectra, Vol.22, No.S1, pp. S133-S146, 2006.
• Yoshikazu Takahashi and Gregory L. Fenves. Software framework for distributed experimental-computational simulation of structural systems. Earthquake Engineering and Structural Dynamics, Vol. 35, pp.267-291, 2006.
• Hirokazu Iemura, Touraj Taghikhany, Yoshikazu Takahashi, and Sarvesh K. Jain. Effect of variation of normal force on seismic performance of resilient sliding isolation systems in highway bridges. Earthquake Engineering and Structural Dynamics, Vol. 34, pp. 1777-1797, 2005.
• Iemura, H., Takahashi, Y. and Sogabe, N. : The load-displacement relationships of RC pier with splitting bond high strength bars (in Japanese), Journal of JSCE, No.774/V-65, pp.59--72, 2004.11.
• Fenves, G.L., McKenna, F., Scott, M.H. and Takahashi, Y. : An object-oriented software environment for collaborative network simulation, Proceedings of 13th World Conference on Earthquake Engineering, Paper No. 1492, 2004.8, Canada.
• Takahashi, Y., Iemura, H., Yanagawa, S. and Hibi, M. : Shaking table test for frictionalisolated bridges and tribological numerical model of frictional isolator, Proceedings of 13th World Conference on Earthquake Engineering, Paper No. 1531, 2004.8, Canada.
• Iemura, H., Takahashi, Y. and Sogabe, N. : Development of unbonded bar reinforced concrete structure, Proceedings of 13th World Conference on Earthquake Engineering, Paper No. 1537, 2004.8, Canada.
• Iemura, H., Takahashi, Y., and Sogabe, N. : Development of Two-Level Seismic Design using Post-Yield Stiffness and Application for UBRC Piers (in Japanese), JSCE Journal of Earthquake Engineering, No.196, 2003.
• Iemura, H., Takahashi, Y., Yanagawa, S., and Hibi, M. : Shake Table Tests For Frictional Isolated Bridge (in Japanese), JSCE Journal of Earthquake Engineering, No.136, 2003.
• Iemura, H., Takahashi, Y., and Sogabe, N. : Innovation of High-Performance RC Structure with Unbonded Bars for Strong Earthquakes (in Japanese), Journal of JSCE, Vol.I-60, No.710, pp.283--296, 2002.7.
• Takahashi, Y., Igarashi, A. and Iemura, H. : Object-Oriented Analysis and Design of Structural Analysis System (in Japanese), Journal of JSCE, Vol. I-57, No.689, pp.301-320, 2001.10.
• Iemura, H., Takahashi, Y., Iwata, S. and Sogabe, N. : Rational Seismic Design for Railway Elevated Bridges using UBRC Members (in Japanese), Proceedings of 26th JSCE Earthquake Engineering Sysmposium, Vol.2, pp.921-924, 2001, Japan.
• Iemura, H., Takahashi, Y. and Sogabe, N. : Unbonded reinforcement for high seismic performance of RC piers, Proceedings of the 13th KKNN Symposium on Civil Engineering, pp. 93-100, 2000.12, Taiwan.
• Iemura, H., Takahashi, Y., Sogabe, N. and Ukai, M. : Development of High Aseismic Performance RC Piers with Unbonded High Strength Bars (in Japanese), Proceedings of 1st Symposium on the Enhancement of Earthquake Performance of Infrastructures Based on Investigation into Fracturing Process, pp.157-162, 2000, Japan.
• Takahashi, Y. and Iemura, H. : Inelastic Seismic Performance of RC Tall Piers with Hollow Section, Proceedings of 12th World Conference on Earthquake Engineering, No.1353, 2000.2, New Zealand.
• Kato, T. and Takahashi, Y. : Earthquake Design and Construction of Tall Composite Bridge Piers, Proceedings of 12th World Conference on Earthquake Engineering, No.899, 2000.2, New Zealand.
• Nakajima, K., Iemura, H., Takahashi, Y. and Ogawa, K. : Pseudo Dynamic Tests and Implementation of Sliding Bridge Isolators with Vertical Motion, Proceedings of 12th World Conference on Earthquake Engineering, No.1365, 2000.2, New Zealand.
• Takahashi, Y., Iemura, H., Ogawa, K., Nakajima, K. and Tamaki, T. : Effects of Vertical Ground Motion to Seismically Isolated Friction Bearing with Hybrid Loading Tests, Proceedings of 7th East Asia-Pacific Conference on Structural Engineering & Construction, pp.824--829, 1999, Japan.
• Iemura, H., Takahashi, Y. and Hirate, H. : Estimation of Earthquake Intensity from the Damage of RC Piers of Viaducts due to the Kobe Earthquake, Proceedings of 7th East Asia-Pacific Conference on Structural Engineering & Construction, pp.710--715, 1999, Japan.
• Iemura, H., Igarashi, A. and Takahashi, Y. : Substructured Hybrid Techniques for Actuator Loading and Shaking Table Tests, Proc. of 1st International Conference on Advances in Structural Engineering and Mechanics, pp.821--826, 1999, Korea.
• Iemura, H., Takahashi, Y., Ogawa, K. and Nakajima, K. : Hybrid Earthquake Loading Tests of a Frictional Base Isolation Bearing with Vertical Motion, Proceedings of International Workshop on Mitigation of Seismic Effects on Transportation Structures, pp.174-183, 1999, Taiwan.
• Iemura, H. , Takahashi, Y. and Chen, Y. : Control of Seismic Energy Partitioning of Bridge Piers with Sliding Rubber Bearing, Proc. of the 2nd World Conference on Structural Control, Vol.2, pp.941--948, 1998, Japan.
• Takahashi, Y., Igarashi, A., and Iemura, H.: Application of Object-Oriented Approach to Earthquake Engineering, Journal of Civil Eng. Information Processing System, Vol.6, pp.271--278, 1997, Japan.
• Fujita, R., Takahashi, Y., and Iemura, H. : Modelling of Structure in Object-Oriented Structural Analysis System (in Japanese), Journal of JSCE Civil Eng. Information Processing System, Vol.6, pp.119-126, 1997, Japan.
• Takahashi, Y., Igarashi, A., and Iemura, H.: Application of Object-Oriented Approach to Earthquake Engineering (in Japanese), Journal of Civil Eng. Information Processing System, Vol.5, pp.123--130, 1996, Japan.

Book

• Matsumoto, M., Watanabe, E., Shirato, H., Sugiura, K., Igarashi, A., Utsunomiya, T. and Takahashi, Y. : Structural Mechanics II (in Japanese), Maruzen, 2000.

Patents

• High-Aseismic Reinforced Concrete Pier using Unbonded High Strength Core Members, （Inventors）Hirokazu Iemura and Yoshikazu Takahashi， Japan Patent No.3418726，2003/4/18
• High-Aseismic Reinforced Concrete Pier using Unbonded High Strength Core Members, （Inventors）Hirokazu Iemura and Yoshikazu Takahashi, USA Patent No.6,685,399, 2004/2/3

Prize

• Outstanding Paper on JSCE Journal of Earthquake Engineering, 2004.

OpenSees and OpenFresco

OpenSees (Open System for Earthquake Engineering) is a software framework for developing applications to simulate the performance of structural and geotechnical systems subjected to earthquakes.The goal of the OpenSees development is to improve the modeling and computational simulation in earthquake engineering through open-source development. I was working at Prof. Fenves lab., UC Berkeley as a research fellow for developing the object-oriented design for hybrid simulation which consists of computational and experimental components.

OpenFresco (Open Framework for Experimental Setup and Control) is a software framework for developing applications to construct virtual experimental laboratory in your software. The initial version of this framework was developed by me and Prof. Fenves and the object-oriented design and implementation are shown in the journal paper (Takahashi and Fenves, Earthquake Engineering and Structural Dynamics, Vol. 35, pp.267-291, 2006). Now the development is public open at NEESforge project page.

Hobby

• Jazz

  I love Joe Williams, male vocalist. I want to let you know his information, and I have his special WWW page

• Computer
  • Gadgets
    I like gadgets, especially small machines. My gadget history is, filoFAX :), Toshiba Libretto 100, IBM Workpad 30J, HP Jornada 690, PSION revo, Sony Clio NR70, Handspring Visor Platium, Treo 90, Treo 270, Treo 600, Treo 750v, Sharp Zaurus C700, C860...
  • LaTeX
• Soccer

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