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斜拉桥是一种特殊结构的桥梁,其特殊之处就在于可以给定一个拉索的初拉力,这个拉力会改变整个斜拉桥结构体系的内力和变形以及各个部件的受力,但是影响斜拉桥内力的因素还有很多,比如说辅助墩。对于斜拉桥这样的大跨度超静定体系,地震、台风以及车辆移动荷载等动力激励的作用下动力反应较为敏感,所以研究斜拉桥的动力响应对其是非常重要的。本文以某斜拉桥为例分析了辅助墩对斜拉桥活载响应的影响,活载作用下辅助墩设置的合理位置,以及辅助墩对斜拉桥动力特性和地震响应的影响。
Cable-stayed bridge is a special structure of the bridge, its special place is that it can be given a cable tension, which will change the entire cable-stayed bridge structural system of internal forces and deformation and the various components of the force, but the impact Cable stayed bridge there are many factors, such as auxiliary pier. For long-span statically indeterminate systems such as cable-stayed bridges, dynamic response is sensitive to earthquake, typhoon and vehicle motive loads. Therefore, it is very important to study the dynamic response of cable-stayed bridge. This paper takes a cable-stayed bridge as an example to analyze the influence of the auxiliary pier on the live load response of the cable-stayed bridge, the reasonable position of the auxiliary pier under the live load and the influence of the auxiliary pier on the dynamic characteristics and seismic response of the cable-stayed bridge.