Seismic response analysis of isolated bridge with friction pendulum bearings
Wang Baofu1,2 Han Qiang1 Du Xiuli1
1. Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education, Beijing University of Technology, Beijing 100124, China
2. North China Institute of Science and Technology, Beijing 101601, China
Abstract：Multiple friction pendulum bearings which exhibit adaptive stiffness and damping behavior is a promising seismic isolation device in performance-based seismic design of bridges. In this paper, an offshore continuous girder bridge was taken as an engineering example and the numerical model of the bridge was established including the soil-structure interaction effect simulated by p-y method based on the soft marine clay conditions. Seismic response characteristics of bridges isolated with different friction pendulum bearings was investigated using response spectrum method and fast nonlinear analysis method. The analytical results indicate that seismic response of bridge piers isolated with MFPS is small than that of the isolated bridges with FPS and MFPS has greater displacement capacity, and MFPS and FPS bearings are both effective in seismic isolation.
