摘要
结合我国长江上拟建的某一主跨为504m的公铁两用结合梁斜拉桥,对这种桥型的非线性分析理论和分析方法、钢与混凝土结合作用的模拟、空间有限元模型总刚带宽的优化、斜拉索初始索力的确定等问题进行了研究,并对该桥进行极限承载力分析;此外,对该桥的刚度问题、设计荷载下的几何非线性的影响等问题进行了研究.研究结果表明,该桥的极限荷载大于(恒载+4.050活载),满足刚度要求,不考虑几何非线性计算所得的各种响应都偏小,最大误差不超过7%.
On the background of a highway/railway combined composite girder cable-stayed bridge with a 504 m main span which will be built over Yangtze River,the theory and method of nonlinear analysis,simulating of composite effect between steel and concrete,optimization of bandwidth of global stiffness matrix and determination of initial cable forces are studied.Analysis of ultimate load of the bridge is finished.Rigidity of the bridge and influence of geometric nonlinearity under design load are also studied.Results show that the ultimate load is more than(dead load+4.050 live load).Under the design load,the rigidity requirement is satisfied and all of the responses are smaller if geometric nonlinearity is not considered,the biggest error may reach 7%.
出处
《长沙铁道学院学报》
CSCD
北大核心
2003年第4期1-5,共5页
Journal of Changsha Railway University
基金
铁道部科技发展计划项目(2001G022)
关键词
结合梁
斜拉桥
极限承载力
有限元法
几何非线性
材料非线性
composite beam
cable-stayed bridge
ultimate load capacity
finite element method
geometric nonlinearity
material nonlinearity
