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由于混合梁刚构桥结构自重较传统的连续刚构桥轻、刚度较小,在动力荷载作用下桥梁结构的动力效应将会很明显,有必要对其动力特性和动力响应进行深入研究。采用有限元的方法对其进行模拟并计算其动力特性,基于全桥模型动力响应试验,测试并分析混合梁刚构桥的动力特性及车载下的动力响应,以此验证有限元模拟的准确性,给出混合梁刚构桥冲击系数合理取值范围。
Due to the lighter weight and lower stiffness of the hybrid rigid-framed Rigid-Bridge, the dynamic effect of the bridge structure under dynamic load will be obvious, so it is necessary to study its dynamic characteristics and dynamic response. The finite element method is used to simulate the dynamic characteristics of the bridge and the dynamic characteristics of the bridge are calculated. Based on the dynamic response of the full-bridge model, the dynamic characteristics and the dynamic response of the hybrid rigid-frame bridge are tested and analyzed to verify the accuracy of the finite element method. A reasonable value range of the impact coefficient of the composite beam rigid frame bridge.