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以西宁通海路跨越湟水河斜拉桥为研究对象,建立全桥三维空间有限元模型,分别采用漂浮与半漂浮的结构体系计算了动力特征值,分析了不同结构体系对结构动力特性所产生的影响。考察了结构的刚度和边界条件设置情况,在动力特性计算基础上,采用地震反应谱多维抗震分析方法,考虑了拉索垂度的非线性影响及桩—土—结构相互作用,采用不同等级的地震动输入,考察结构的抗震性能,对结构设计提出了改进措施及建议,为较宽独塔单索面斜拉桥的地震力分析提供了工程实践经验及有效的分析方法。
Xining Tonghai Road across the Huangshui River cable-stayed bridge as the research object, the establishment of full-bridge three-dimensional finite element model, respectively, using floating and semi-floating structural system to calculate the dynamic eigenvalues, analysis of different structural systems generated by the dynamic characteristics of the structure Impact. Based on the calculation of dynamic characteristics, the seismic response spectrum multidimensional seismic analysis method is adopted. The nonlinear influence of cable sag and the pile-soil-structure interaction are considered. Different grades of Earthquake input, and study the seismic performance of the structure, put forward the improvement measures and suggestions for the structural design, and provide engineering practice and effective analysis methods for the seismic force analysis of wide single tower cable-stayed bridge with single tower.