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为了研究异形斜塔混合梁斜拉桥极限承载力,基于几何、材料非线性理论,采用大跨径组合体系桥梁极限承载力的非线性分析方法,建立了异形斜塔混合梁斜拉桥的数值分析模型。分别采用横向对称及偏心均布荷载形式,针对结构各控制截面的最不利加载工况,对异形斜塔混合梁斜拉桥的临界荷载及极限承载力进行了计算,得到该桥梁结构失稳以及材料屈曲发生区域以及极限承载能力,研究成果可供同类桥梁分析参考。
In order to study the ultimate bearing capacity of cable-stayed bridge with profiled leaning tower, the nonlinear analysis method of the ultimate bearing capacity of the bridge with long-span composite system is established based on the theory of geometry and material nonlinearity. Analysis model. The transversely symmetric and eccentric uniform load forms are adopted respectively. According to the most unfavorable loading condition of each control cross section of the structure, the critical load and ultimate bearing capacity of the cable-stayed bridge with profiled lengthened hybrid beam are calculated, and the structural instability of the bridge is obtained Material buckling occurred area and the ultimate bearing capacity, the research results for similar bridge analysis and reference.