机构地区: 同济大学土木工程学院桥梁工程系
出 处: 《中南公路工程》 2004年第4期24-28,共5页
摘 要: 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,采用不分层圆截面Timoshenko梁单元和钢管混凝土组合材料的本构关系,对南宁市永和大桥在静力荷载作用下的极限承载力进行了分析,并以钢管混凝土拱的模型试验来验证计算分析结果。 Long span concrete filled steel tubular arch bridges exhibit nonlinear characteristics in both material and geometry in deformation and instability. Based on the finite element method of Timoshenko beam with rounded cross-section and the constitutive relations of combinatorial material of concrete filled steel tube, the ultimate bearing capacity of Nanning Yonghe Bridge is analyzed under static loads. Results of a model test for concrete-filled steel tubular arch showed that the they were in a good agreement with the numerical results.