作　　者： ; ; ; ;

机构地区： 同济大学土木工程学院桥梁工程系

出　　处： 《公路交通科技》 2003年第1期67-70,共4页

摘　　要： 以上海在建的主跨 5 5 0m的中承式钢拱桥为例 ,考虑结构几何和材料非线性效应 ,用增量和NewtonRaphson迭代法详细分析大跨度钢拱桥在不同加载方式作用下的极限承载力 。 In this paper, the example bridge is a long-span half-through steel arch bridge of a 550m central span under construction in China Two loading sequences are used to determine the load-deformation response and the ultimate load of the bridge: Sequence I is the sequence in which the dead and wind loads are applied first and then the live load is increased proportionally to the collapsed load Sequence II is the sequence in which the dead and live loads are applied first and then the wind load (wind velocity) is increased proportionally to the collapsed load (critical wind velocity) The ultimate capacity of this bridge under the two loading sequences is investigated using geometrically and materially nonlinear buckling method The effects of loading seq uences on the ultimate load capacity of long-span steel arch bridges are discussed

关 键 词： 加载方式 大跨度钢拱桥 极限承载力 迭代法

领　　域： [建筑科学] [交通运输工程]