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单索面斜拉桥以其柔美的结构外形、开阔的桥面视野和合理的受力性能,被大量应用于中国市政桥梁工程中。该文以一座大型单索面混凝土斜拉桥为工程背景,考虑各种非线性对结构动力特性的影响,采用有限元软件建立了其精细的有限元空间动力分析模型,对其动力特性进行了详细的理论分析。成桥以后再对桥梁进行了动力测试,并与理论分析结果进行对比。结果表明:该文建立的理论分析模型合理,另外,动力测试结果较理论分析结果偏大,表明该结构的实测刚度较理论刚度要稍微偏大。
Single cable plane cable-stayed bridge is widely used in China’s municipal bridge projects due to its soft appearance, open deck view and reasonable mechanical properties. Taking a large single cable plane cable-stayed bridge as an example, considering the influence of various nonlinearities on the dynamic characteristics of the structure, the finite element software is used to establish the detailed finite element dynamic analysis model for the dynamic characteristics of the cable-stayed bridge. Detailed theoretical analysis. Bridge after the power test carried out again, and the theoretical analysis of the results were compared. The results show that the theoretical analysis model established in this article is reasonable. In addition, the dynamic test results are larger than the theoretical analysis results, indicating that the measured stiffness of the structure is slightly larger than the theoretical stiffness.