行波效应对弱对称双塔斜拉桥地震响应的影响

文中推导了大跨度桥梁考虑行波效应影响的分析模型以及求解方法，介绍了大型有限元程序中实现行波效应的方法：大质量法与相对位移运动法。以某一实际公路大跨度斜拉桥为工程实例，分析了在不同波速及不同地震波输入方向的行波效应对斜拉桥主塔地震响应的影响。结果表明，当斜拉桥纵向对称性不强时，不同地震波输入方向的行波效应产生的桥梁结构响应并不相同。当进行纵向非对称桥梁行波效应分析时，应考虑不同地震波输入方向对桥梁结构响应的影响。

Traveling Wave Effect on the Seismic Response of Weakly Symmetric Twin Towers of Cable-Stayed Bridge

This article deduces the analytical model and solutions for traveling wave effects of long-span bridges, introduces the method of the large finite element program to achieve the effect of the traveling wave：large mass method, relative movement method. Taking a large-span cable-stayed bridge as an example,the influence of the traveling wave effect is analyzed at different earthquake wave speed on the seismic response of the main tower. The results show that, when the cable-stayed bridge is not strong longitudinal symmetry, different seismic wave input directions of the traveling wave make the response of the bridge structure different. The longitudinal asymmetric bridge traveling wave effect analysis indicates that the impact of the different seismic wave input directions of the bridge structure response should be considered.