【摘要】 结合某大跨三塔斜拉桥工程设计实例,采用有限元分析程序ANSYS建立动力计算模型。用子空间迭代法对桥梁的动力特性进行了计算,根据桥址场地地震动参数,用反应谱法和时程分析法进行地震反应对比分析。建议在大跨度斜拉桥抗震设计中,以反应谱分析结果作为抗震设计依据,以时程分析结果作为复核。更多还原

【Abstract】 In this paper,a long-span cable-stayed bridge with three-tower is investigated,a 3D finite element model was established by the software ANSYS.The dynamics characteristics of the bridge are analyzed by sub-space iteration method.According to the earthquake dynamic parameters of the bridge site the earthquake response is analyzed using the earthquake response spectrum method and the time history analytical method.It suggests that response spectrum analysis results can be used as a basis while the time-history analysis results as review for seismic design.更多还原