Study on Seismic Energy Responses of a Continuous Girder Bridge isolated by Friction Pendulum System
ZHANG Changyong1, ZHONG Tieyi2, YANG Haiyang2
1.Shandong Provincial Communications Planning and Design Institute, Jinan 250031, China;
2.School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
Abstract: A 3D finite element analysis model of a continuous concrete girder bridge was established as an example. Under the excitations of three artificial earthquake waves, the energy responses of the non-isolated bridge and FPS isolated bridge were calculated using non-linear time history analysis method in longitudinal direction and the energy dissipation effects of three isolation schemes were compared. Furthermore, the effects of equivalent sliding radius and friction coefficient on the energy responses and the energy distributions were also investigated. The research results indicated that, for isolated bridge, most seismic energy was dissipated by FPS and the energy dissipation demand of bridge structure was decreased efficiently, and the effect of full isolation scheme was best one among three different isolation schemes. The energy dissipation efficiencies of FPS were enhanced and the structure energy dissipation demands were effectively decreased with the increments of both equivalent sliding radius and friction coefficient. But when the equivalent sliding radius and the friction coefficient were comparatively large, the enhancement of energy dissipation efficiency trend to be little.
张常勇1,2，钟铁毅2，杨海洋2. 摩擦摆支座隔震连续梁桥地震能量反应研究[J]. 振动与冲击, 2017, 36(16): 63-67.
ZHANG Changyong1, ZHONG Tieyi2, YANG Haiyang2. Study on Seismic Energy Responses of a Continuous Girder Bridge isolated by Friction Pendulum System. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(16): 63-67.
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