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本文使用有限元分析软件MIDAS建立了润扬大桥北汊斜拉桥的三维有限元动力计算模型,分析斜拉桥动力特性。本文采用了单主梁模型简化桥面系结构,输入加劲梁回转质量以便能更准确地计算结构的扭转振型,使用弹性连接单元模拟了抗风支座。通过动力计算得出大桥的自振频率和振型,分析振型参与质量表格表明应使尽可能多的振型参与动力计算。研究成果为润扬大桥北汊斜拉桥的动力测试提供了理论计算数据。
Abstract：A three-dimension FE model of the cable-stayed bridge for the North branch of Runyang Bridge was firstly established with the program of MIDAS. Single-girder model have been adopted to simplify the bridge deck system. Adding rotational mass to the nodes of the main girder was to calculate the torsion modes more exactly. Wind-resisting support was simulated by using resilient coupling element. Then, free vibration analysis of thebridge is carried out by MIDAS, and the natural frequency and mode shapes of the bridge were obtained. According to the computation result, more vibration types should be included in the dynamic calculation. The research results can provide the calculation data for the dynamic test of the North branch of Runyang Bridge.
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基本信息:
中图分类号:U441.3
引用信息:
[1]刘云,钱振东.润扬大桥北汊斜拉桥的动力分析模型和动力特性的研究[J],2006(01):99-103+109.
基金信息:
东南大学优秀青年教师资助计划资助。