【摘要】 运用大型有限元软件ANSYS,同时采用3种分析极限承载力的方法(线性屈曲法,几何非线性法与同时考虑几何非线性和材料非线性法),对设计中的空钢管桁肋式拱桥———湘江特大桥主跨的主拱进行极限承载力计算分析.分析结果表明,在计算空钢管桁肋式拱桥极限承载力时考虑双重非线性方法求解极限承载力得出的结果比线性方法更符合实际情况.更多还原

【Abstract】 By the ANSYS, three methods for evaluation of the ultimate load-carrying capacity (linearity geometric nonlinearity, material nonlinearity and geometric nonlinearity)are consided in the steel-tube truss rib arch bridge of the Xiangjiang. The results show that the double nonlinearities is more fit to fact than the linearity in computing the stability coefficient and the ultimate load-carrying capacity of the large span steel-tube truss rib arch bridge.更多还原