【摘要】 建立了平面杆系UL列式的几何非线性与材料非线性耦合分析方法 ,并编制非线性分析程序。采用所编的程序对文献 [2、 6]提供的两个模型拱进行了计算分析 ,通过对拱桥结构的非线性屈曲分析 ,给出了拱顶挠度-荷载的关系曲线 ,可以看到拱桥结构的屈曲与压杆失稳是有差异的 ,拱结构在极值荷载点没有明显的屈服台阶 ,挠度 -荷载曲线在达到峰值点立即进入下降段 ;在对模型拱进行几何与材料非线性分析中 ,可以看到模型拱的极限承载能力主要受材料非线性的影响更多还原

【Abstract】 A procedure for determining the bearing capacity of a frame structure is proposed in the paper.A computer program is developed at the same time.The updated Lagrangian formulation combined with layered finite element method is used in the study.It is considered in the study on the geometric coupled with material nonlinearity.Two examples for illustration are recomputed using the developed program;its data is got from other reference paper.A load-deflection curve is described.It is shown that there is no obvious yielding plateau.The bearing capacity of a reinforced concrete arch bridge is mainly influenced by the material nonlinearity.更多还原