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采用有限元MADIS软件建立了某连续刚构桥的空间有限元计算模型,对墩顶有无横系梁进行了动力特性计算,分析了加横系梁后对桥梁的固有频率和振型特性的影响。根据相似理论,制作了实桥最大悬臂状态的气弹模型,通过风动试验研究了动力特性的变化对连续刚构桥最大悬臂状态风致振动的影响,为设计提供了一定的参考。
The finite element model of a continuous rigid frame bridge was established by finite element software MADIS. The dynamic characteristics of the transverse beam with or without a pier were calculated. The natural frequencies and mode shapes of the bridge after the addition of transverse beams were analyzed influences. According to the similarity theory, the aeroelastic model of the maximum cantilever state of a real bridge was made. The influence of the dynamic characteristics on the wind induced vibration of the maximum cantilever state of continuous rigid frame bridge was studied by the wind test, which provided a reference for the design.