【摘要】 分析了多维地震动作用下隔震桥梁结构的水平向和竖向振动反应.首先建立了隔震桥梁结构的非线性运动方程,根据非线性随机振动理论对运动方程进行了等效线性化处理,并采用实模态法获得了等效线性方程的解析解,提出了结构响应的计算公式.最后给出了多维地震动作用下隔震桥梁结构的地震响应分析算例,计算结果显示了分析方法的有效性.更多还原

【Abstract】 The horizontal and vertical earthquake response of an isolated bridge structure under multiple seismic ground motion excitations is analyzed in this paper.The nonlinear dynamic equations are established firstly, then the equations are linearized to an equivalent system by nonlinear random vibration theory.The exact solutions of the equivalent linearized equations are obtained by classical modal method,and the computation formula of structural response are also provided in the paper.An analysis example of isolated bridge structure under the action of multiple seismic ground motion is presented.The analysis results show the analysis method is effective,and it is suitable to use in engineering.更多还原