哑铃型钢管混凝土拱桥的计算方法研究

以中承式钢管混凝土拱桥———江山市城中大桥为工程背景,对哑铃型钢管混凝土拱桥的计算方法进行研究,对于钢管混凝土拱肋的简化计算,目前常采用换算截面法和统一模量法,应用这两种方法分别建立平面有限元模型,同时,采用大型通用有限元程序,根据实际截面建立空间有限元模型,对这几种方法计算所得的理论值以及成桥荷载试验所得的实测值进行分析比较,为该类桥梁的计算提供参考。

Study on Calculating Methods of Dumbbell-shaped CFST Arch Bridge

Based on the half-through CFST arch bridge,Chengzhong Bridge in Jiangshan City,the calculating method of the dumbbell-shaped CFST arch bridge is studied.For the simplified calculation of the CFST arch rib,at present,the transformed section method and the uniform modulus method are usually used.Two planar finite element models are established separately according to the two methods mentioned above.At the same time,with the great general finite element program,the spatial element model is also established according to the true cross-section of the CFST arch rib.The theoretical results gained by the three methods are compared with the data from the experimental investigation,which can be reference for calculation of the similar bridges.