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悬索桥结构的振动特性参数(振动频率、振型及阻尼比)是大桥动力学性能的决定因素之一,本文采用Midas Civil结构分析软件建立了某单跨简支钢桁架悬索桥的三维有限元模型,分析了大桥的动力特性,并将有限元分析结果与大桥的动力性能测试结果进行了比较以验证数值分析的准确性。在此基础上研究了中央扣索对单跨简支钢桁梁悬索桥自振特性的影响。
The vibration characteristic parameters (vibration frequency, mode shape and damping ratio) of the suspension bridge are one of the determinants of the dynamic performance of the bridge. In this paper, a three-dimensional finite element model of a single span simply supported steel truss suspension bridge is established by using Midas Civil structural analysis software, The dynamic characteristics of the bridge are analyzed and the results of the finite element analysis and the dynamic performance test of the bridge are compared to verify the accuracy of the numerical analysis. Based on this, the influence of central buckle cable on the natural vibration characteristics of single span simple supported steel truss suspension bridge is studied.