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| Effects of seismic isolation system on working performance of rocking self-resetting high piers |
| ZHANG Yuzhi |
| School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China |
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Abstract In order to improve the seismic isolation performance of rocking self-resetting high piers, lead-rubber bearing and fluid viscous damper were combined with rocking self-resetting high pier, respectively to form two seismic isolation systems. 3 ground motions with two different intensities were taken as inputs, and the time history analysis method and the software OpenSEES were adopted to analyze seismic responses of the two seismic isolation systems. Through comparing seismic isolation indexes of pier’s maximum shear force, pier’s maximum bending moment, pier top’s maximum displacement and girder’s maximum displacement, and the maximum absolute value of the relative displacement between pier and girder in all seismic responses, it was shown that the isolation system 2 with fluid viscous damper located between abutment and girder under the condition of pier and girder being fixed is suitable for being built on soft soil sites, while the isolation system 3 with lead-rubber bearing located between pier and girder and fluid viscous damper located between abutment and girder is suitable for being built on hard soil sites.
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Received: 19 January 2018
Published: 28 May 2019
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