自锚式混凝土吊桥非线性有限元分析

介绍了基于有限元理论的自锚式混凝土吊桥的非线性分析方法，考虑了主缆垂度效应、大位移效应、初始内力效应、混凝土收缩徐变、预应力损失对结构非线性的影响，同时考虑了施工阶段塔顶鞍座顶推滑移和加劲梁与支架间接触非线性的影响。利用所编制的程序对1座跨径240 m的自锚式混凝土吊桥——吉林兰旗松花江大桥进行了分析，研究了该桥的活载非线性和长期非线性行为，并对施工过程进行了分析，得出了有意义的结果。

Nonlinear finite element analysis of self-anchored concrete suspension bridge

A nonlinear structure analysis method based on finite element theory for self-anchored concrete suspension bridge is introduced, which includes nonlinear effects of cable sag, large displacement, initial internal force, shrinkage and creep of concrete, and loss of prestress. The movement of saddle on tower and nonlinear action between stiffening girder and form plate are also considered. The programme based on this method is used to analyze Jilin Songhua River Bridge-a self-anchored concrete suspension bridge with the main span of 240 m. The nonlinearity of live load and long-term load is studied, and the structure in construction is computed. The results are useful in practice.