THE INFLUENCE OF SITE CONDITIONS ON DYNAMIC CHARACTERISTICS OF ISOLATION BRIDGES
In this paper, considering different site conditions, earthquake motion and shear wave velocity, the changing trends of decreasing amplitude ratio are studied through time history analysis by finite element method. It is present the application range of seismic isolation bridges adopted lead rubber bearing. Finally, it is concluded that performance of isolation bridges with lead rubber bearing is excellent under the first and second site conditions; the performance becomes worse under the third and forth site conditions and the ability of seismic isolation can not be obtained when the shear wave velocity is dropped below 140m/s. Then other ways of decreasing seismic response of bridges should be taken.
earthquake site condition shear wave velocity lead rubber bearing decreasing amplitude ratio
Zhao-Tong Hu We Zhu Jian-Xin Liu
Changan University, Xian 710064, P.R. China The First Highway Survey and Design Institute of China, Xian 710075, P.R. China
国际会议
长沙
英文
285-290
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）