谈杭长客专江山港特大桥连续梁混凝土徐变效应

On creep effect of continuous beam concrete at Jiangshangang Super-large Bridge along Hangzhou-Changsha Passenger Railway

通过有限元软件桥梁博士与MIDAS建立结构模型,对杭长客专江山港特大桥连续梁混凝土后期徐变变形进行了计算,并对所得结果进行了对比分析,得出江山港大桥的后期变形主要由徐变控制,MIDAS的计算结果比桥梁博士的计算结果偏小些,为施工单位提供了各节段准确的立模标高,确保了该桥顺利合龙。

According to the finite element software, Bridge Doctor, and MIDAS to establish structural models, the paper undertakes the calcula- tion of the creep deformation in the later period at continuous beam concrete of Jiangshangang Super-large Bridge along Hangzhou-Changsha Pas- senger Railway, has the comparative analysis of results, and concludes the deformation at the later period of Jiangshangang Bridge can be con- trolled by the creep, and the calculation of MIDAS is less than the one of Bridge Doctor, so as to provide the accurate formwork erection elevation and ensure the smooth closure of the bridge.