On the background of Badong Yangtze River Highway superelevation cable-stayed bridge, this paper does many condition aralysis which simulates the automobile through various conditions of bridge, unidirectional and bidirectional, also simulates multiple load on the dynamic response of the car bridge after 10 years by using ANSYS. The research for the law of the displacement of tower top and the stability of high tower can provide some reference for the maintenance of the bridge and redesign during the service.%本文以巴东长江公路超高斜拉桥为背景，运用ANSYS模拟汽车单向、双向同时通过桥梁的各种工况分析，模拟多重负荷10年后桥塔对汽车的动力响应。研究在多重循环荷载下内力位移变化规律及其对高塔稳定性的影响，为营运期对桥梁的维护和再设计类似新桥提供借鉴。
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