应用有限元方法对索-拱结构及普通拱结构的稳定性能进行对比研究.其方法是:借助于通用有限元软件ANSYS对比研究索-拱与普通拱结构在各种荷载作用下的稳定性能.结合牛顿-拉弗森法和弧长法,分别对索-拱与普通拱结构在考虑几何非线性及同时考虑几何与材料双重非线性情形的极限承载能力进行数值分析.研究结果表明,索可以非常明显地提高和改善纯拱结构的稳定性能.%With the finite element method, the stability behaviors of cable-arch and true arch were studied. The procedures were as follows: Using the FEA software ANSYS, the stability behaviors of cable-arch and true arch under all kinds of loads were contrasted. Using the finite element approach in conjunction with the arc-length method and Newton-Raphson iteration, contrastive study of the limit load-carrying capacity of cable-arch and true arch were presented, in which geometric nonlinearity and double nonlinearity of structures were considered respectively. The results show that cables can improve the stability behaviors of true arch evidently and effectively.
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