北京市昌平区南环大桥施工过程仿真分析

Simulation on Construction Process of Beijing Changping Nanhuan Bridge

北京市昌平区南环大桥为跨径达175m的大跨径钢箱梁自锚式悬索桥,通过对其施工过程进行仿真分析,提出从成桥状态识别主缆无应力长度,进而确定主缆空缆线形及主索鞍塔顶预偏值的方法,以及合理确定吊杆张拉方案的原则,可供桥梁工程技术人员参考。

Beijing Changping Nanhuan Bridge is a 175m-span steel box girder self-anchored suspension bridge. A simulation analysis of the construction process of this bridge is demonstrated. Then a method for identifying the non-stress length of the main cable from the bridge-completion state,and further determining the shape of main cable and the pre-deviation of the main cable saddle tower is put forward. A proper procedure for hanger tension is proposed,which could serve as a reference for bridge engineers.