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文章针对有推力钢管混凝土拱桥的动力特性进行了分析,参考巫峡长江大桥的设计,采用ANSYS有限元程序建立这一类钢管混凝土拱桥的力学分析模型,利用子空间迭代法计算了该模型的自振频率和振型,分析了拱脚位移、吊杆的布置方式、横撑布置等参数的变化对有推力钢管混凝土拱桥动力特性的影响,得到了这类体系的动力特点,为合理、安全地设计这类桥梁提供参考依据。
In this paper, the dynamic characteristics of CFST arch bridge are analyzed. Referring to the design of Wu Gorge Yangtze River Bridge, the mechanical analysis model of CFST arch bridge is established by ANSYS finite element program. The subspace iteration method is used to calculate the self- Vibration frequency and vibration mode of the arch bridge, the influence of the displacement of the arch foot, the layout of the boom, the layout of the bracing and other parameters on the dynamic characteristics of the CFST arch bridge with thrust is analyzed, and the dynamic characteristics of such system are obtained. Design such bridges provide a reference.