250m大跨度连续刚构桥的结构分析

Structural Analysis on 250-m Large-span Continuous Rigid Frame Bridge

该文以本池沟特大桥设计为例,分别进行了结构静力计算和动力计算,按照目前实行的JTGD62-2004规范进行了成桥阶段各项检算。计算结果表明:由于本池沟大桥桥面宽度较窄,通过预应力钢束的优化,实现了全预应力混凝土设计的要求。自振特性分析结果表明动力性能良好。研究成果对大跨度连续刚构桥的设计具有一定的借鉴作用。

Taking the design of the super-large bridge in Benchigou as an example,the article carries out the structural static calculation and dynamic calculation separately.According to the present executive criterion JTG D62-2004,various checking computations in the stage of bridge completion are implemented.The calculation results make clear that the full prestressing concrete design meets the requirements by the optimization of prestressed steel beam because of that the deck width of Benchigou Bridge is narrower.The analysis result of vibration characteristics shows that the dynamic performance is good.The study result has the definite reference for the design of large-span continuous rigid frame bridge.