多维地震动作用下隔震桥梁结构的地震响应分析  

Earthquake response analysis of isolated bridge structures under the multiple seismic ground motion inputs

作　　者：杨彦飞[1] 刘文光[1] 何文福[2] 霍达[2] 

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]北京工业大学建筑工程学院,北京100022

出　　处：《广州大学学报（自然科学版）》2007年第5期83-86,共4页Journal of Guangzhou University:Natural Science Edition

基　　金：国家自然科学基金资助项目(50578045);广东省科技厅项目资助(2004B2801001)

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.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.

关 键 词：多维地震动 非线性随机响应 隔震桥梁 

分 类 号：TU352[建筑科学—结构工程]