Experimental verification and study on influence of seismic wave parameters on seismic mitigation effect of base isolation system
Wu Zhongtie1 Fan Pingping2 Du Yongfeng3 Cheng Xuansheng3 Gao Zhonghu1
1. Northwest Minzu University, Lanzhou 730030, China; 2. Lanzhou Institute of Technology, Lanzhou 730050, China;
3. Lanzhou University of Technology, Lanzhou 730050, China
Abstract：In order to study the influence of seismic wave parameters on dynamic response and seismic mitigation effect of base isolation system, sixteen seismic waves were selected from chichi earthquakes as input and numerical analysis was conducted on the single degree of freedom (SDOF) base isolation system. The chosen influence parameters include the median period, the predominant period, the ratio of peek ground velocity to peek ground acceleration and rupture distance and amplitude of seismic waves. And the analysis results were verified by the shaking table test. The results indicate that the parameters of seismic waves, including the median period, the predominant period, the ratio of peek ground velocity to peek ground acceleration, rupture distance and amplitude of seismic waves, have a great influence on the dynamic response and seismic mitigation effect of base isolation system with strong correlations. The effect of the ratio of peek ground velocity to peek ground acceleration is most obvious under the same amplitude of seismic waves, so it can be determined as a main index to analyze the seismic mitigation effect of base isolation system. The seismic reduction ratio of base isolation system increases with the amplitude of seismic waves under the far fault ground motion and the near fault ground motion，and remains stable at the certain amplitude of seismic waves. Seismic mitigation effect of base isolation system is well. The seismic mitigation effect of base isolation system is worst under the near fault pulse-like ground motion. The numerical analysis results agree well with the experimental results, which proves the reasonability and reliability of the analysis results.
吴忠铁 范萍萍 杜永峰 程选生 高忠虎. 地震波参数对基础隔震体系的减震效果影响#br# 研究与试验验证[J]. 土木工程学报, 2019, 52(6): 35-44, 54.
Wu Zhongtie Fan Pingping Du Yongfeng Cheng Xuansheng Gao Zhonghu. Experimental verification and study on influence of seismic wave parameters on seismic mitigation effect of base isolation system. 土木工程学报, 2019, 52(6): 35-44, 54.
