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简要介绍了之江大桥主桥的工程概况及主要荷载标准,采用空间杆系有限元对拱形钢塔斜拉桥的架设过程以及运营阶段进行空间静力分析;并结合两水准设防标准,进行抗震性能验算;针对钢塔上拉索锚固区以及塔底的钢混结合段等构造设计复杂区域,则采用空间板壳元建立仿真模型,进行细部分析。分析结果表明:各项受力计算均满足相关规范要求,构造设计合理。
This paper briefly introduces the engineering general situation and main load standards of the main bridge of Zhijiang Bridge. The space rod finite element method is used to analyze the erection process and the space static analysis of the cable-stayed bridge with arch steel tower. Combining with the two-level fortification standard, Aiming at the structural design of complex area such as the anchorage zone of the upper cable of the steel tower and the steel-concrete combination at the bottom of the tower, a space plate shell element is used to establish a simulation model for detailed analysis. The analysis results show that all the stress calculations meet the requirements of the relevant codes and the structure design is reasonable.