Parameter analysis of friction pendulum bearings in underground stations during the earthquake
Chen Zhiyi1,2 Jia Pen 2Liu Zhiqian2
1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;
2. College of Civil Engineering, Tongji University, Shanghai 200092, China
Abstract：In order to study the influence of friction pendulum bearing(FPB)parameters on seismic response of underground station structure, a refined 3-dimensional finite element model of FPB is established. Using the method of dynamic time history analysis, the influences of the different combinations of friction coefficient of sliding surface and equivalent radius of concave surface of FPB on seismic response of underground station structure are studied. It is found that the changes of friction coefficient and equivalent radius may obviously affect the seismic response of underground station structure. Compared with the equivalent radius, the influence of the change of friction coefficient on the seismic response is greater. Particularly, the smaller the friction coefficient is, the smaller the seismic response of the central column is. However, the change of equivalent radius may result in different seismic responses.
