【摘要】 以我国高速铁路桥梁为例,建立合理的摩擦摆隔震桥梁力学模型,并通过数值模拟,对摩擦摆支座在高速铁路桥梁上的隔震效果进行研究。研究结果表明:建立隔震桥梁双自由度力学模型,能够较为准确地计算出隔震桥梁的地震响应;选用不同地震波,摩擦摆摩擦因数对高铁主梁最大位移影响规律不同;通过在桥墩与主梁间设置摩擦摆隔震装置,高铁桥梁主梁加速度、墩底剪力、墩顶位移隔震率分别可以达到40%、35%、50%;墩底剪力、主梁位移响应幅值随着桥墩高度增加有很大增加。更多还原

【Abstract】 Taking Chinese high-speed railway bridge as an example, a reasonable double degree-of-freedom mechanical model of FPB isolation bridge was established,and the isolation effect of FPB isolation bridge was studied through numerical simulation. The results show that the model can more accurately calculate the seismic response of isolated bridges; with different seismic waves,the friction coefficient of FPB has different effects on the displacement response of the bridge girder; the isolation rates of acceleration of bridge girder,shear of the bottom of pier,displacement of the top of pier can reach 40%、35%、50% respectively; shear of the bottom of pier and displacement of bridge girder have a large increase when the height of pier increases.更多还原