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Structural Engineering and Mechanics Volume 22, Number 6, April20 2006 , pages 761-783 DOI: https://doi.org/10.12989/sem.2006.22.6.761 |
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Bo-Jen Chen, C. S. Tsai, L. L. Chung and Tsu-Cheng Chiang
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| Abstract | ||
| The enlargement of interest in base isolators as an earthquake-proof design strategy has dramatically accelerated experimental studies of elastomeric bearings worldwide. In this paper, a new base isolator concept that is a hybrid system of rubber bearings is proposed. Uniaxial, biaxial, and triaxial shaking table tests are also performed to study the seismic behavior of a 0.4-scale three-story isolated steel structure in the National Center for Research on Earthquake Engineering in Taiwan. Experimental results demonstrate that structures with a hybrid system of rubber bearings composed of stirruped rubber bearings and laminated rubber bearings can actually decrease the seismic responses of the superstructure. It has been proved through the shaking table tests that the proposed hybrid system of rubber bearings is a very promising tool to enhance the seismic resistance of structures. Moreover, it is demonstrated that the proposed analytical model in this paper can predict the mechanical behavior of the hybrid system of rubber bearings and seismic responses of the base-isolated structures. | ||
| Key Words | ||
| rubber bearing; base isolation; seismic engineering; hybrid system. | ||
| Address | ||
| Bo-Jen Chen; R & D Department, Earthquake Proof Systems, Inc., Taichung, Taiwan, R.O.C. C. S. Tsai; Department of Civil Engineering, Feng Chia University, Taichung, Taiwan, R.O.C. L. L. Chung; National Center for Research on Earthquake Engineering, Taipei, Taiwan, R.O.C. Tsu-Cheng Chiang; Graduate Institute of Civil and Hydraulic Engineering, Feng Chia University, Taichung, Taiwan, R.O.C. | ||