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以西宁通海路跨越湟水河斜拉桥为研究对象,分别采用鱼刺梁模型和梁格法计算了动力特征值,考察了结构的刚度和边界条件设置合适与否,并比较了两种建模理论计算结果的异同,在动力特性计算的基础上,采用第一类线弹性稳定方法,分别研究了桥塔的屈曲稳定性和全桥的屈曲稳定性,考察了结构的整体稳定安全性,为较宽独塔单索面斜拉桥提供了动力分析的工程实践经验及有效的分析方法。
Taking Xishuanghai Bridge across Huangshuihe cable-stayed bridge as the research object, the dynamic eigenvalues were calculated by using the fishbone beam model and the beam grid method respectively, and the appropriateness of the stiffness and boundary conditions of the structure was investigated. Two modeling theories were compared Based on the calculation of dynamic characteristics, the first kind of linear elastic stability method is used to study the buckling stability of bridge tower and the buckling stability of full bridge respectively. The overall stability and safety of the structure are investigated, Single tower single cable plane cable-stayed bridge provides engineering practice of dynamic analysis and effective analysis.