巫峡长江大桥极限承载能力分析

针对大跨度钢管混凝土拱桥在变形、失稳破坏期间产生的材料和几何非线性特性,考虑拱肋初始几何缺陷和结构在施工期间所形成的初应力等因素的影响,采用高精度的圆截面梁单元和钢管混凝土组合材料的本构关系,对巫峡长江大桥在静力荷载作用下的极限承载力进行了分析。

Ultimate Bearing Capacity Analysis of the Wu Gorge Bridge over Yangtse River

For long-span concrete filled steel tubular arch bridges,it is the nonlinear characteristics of material and geometric design during the period of deformation and instability,which should be taken into account in the analysis of the structure effectiveness and initial stress of arch rib. Based on the finite element technique of high accuracy beam with a rounded section,and on the constitutive relations of composite material of concrete-filled steel tube,this paper analyzes the ultimate bearing capacities of the Wu Gorge Bridge in the Yangtse River under static loads with structural simulation for entire bridge.