In order to ensure the function of the isolated bridge under serviceability limit state,it is necessary to set the shear-key in the FPB.Therefore,it is necessary to study the influence of shear-key on isolated bridges.Taking a continuous bridge in the highly seismic region of the eastem Guangdong province as example,the whole bridge finite element model was established.The response of the isolated bridge with FPB under the excitation of E1 and E2 seismic load was analyzed,and the influence of the bearing capacity of shear-key on the seismic response of the bridge was studied by changing the bearing capacity of the shear-key in the support.The results show that the bearing capacity of the shear-key has a great influence on the amplitude of the bending moment at the bottom of pier and displacement at the top of pier,but has little influence on the displacement amplitude of the main beam and the bearing.When the bearing capacity P of shear-key to the vertical load W of fixed support is equal to 0.08,it reaches the optimum,which makes the shear-key not to be invalid in the case of E1 earthquake excitation,and has little influence on the effect of isolation under the E2 earthquake excitation.
关键词
摩擦摆支座/剪力键/数值模拟/桥梁减隔震
Key words
FPB/shear-key/numerical simulation/seismic isolation of bridge
维普
万方数据