V形双拱独塔斜拉桥结构特性

Structure Characteristics of Cable-Stayed Bridge with V-Shaped Double Arch Single Pylon

为了研究V形双拱独塔斜拉桥的结构特性,通过对国内已建的5座V形双拱独塔斜拉桥结构设计参数进行统计分析和归纳,给出结构参数的设计取值范围;并以沣河大桥为工程背景,采用数值分析法从合理成桥状态、汽车活载效应等方面分析了V形双拱独塔斜拉桥和相应单拱独塔斜拉桥受力区别.结果表明,V形双拱独塔斜拉桥主梁的参数与矮塔斜拉桥相吻合,拱塔参数与常规斜拉桥相接近;V形拱塔的受力不利且刚度小,结构受力以主梁为主,拉索为辅.

In order to study structural characteristics of cable-stayed bridge with V-shaped double arch single pylon,the structural parameters of the five cable-stayed bridge with V-shaped double arch single pylon built in China were analyzed,and the range of structural parameters was summarized.On the basis of the Fenghe River Bridge,differences of the force between cable-stayed bridge with Vshaped double arch single pylon and cable-stayed bridge with arch single pylon the corresponding single arch cable-stayed bridge was analyzed from the aspects of the reasonable bridge state and the live load.The results show that main beam parameters of cable-stayed bridge with V-shaped double arch single pylon are identical with cable-stayed bridge with low towers,arch tower parameter parameters of cable-stayed bridge with V-shaped double arch single pylon are identical with conventional cable-stayed bridge;V-shaped arch has a bad force and small stiffness.The structure stress is dominated by the main beam,and lasso is auxiliary.