空间钢框架结构的几何与材料非线性分析

本文采用有限变形理论及内力屈服面塑性流动理论对空间钢框架的极限承载力进行了弹塑性在形全过程分析。理论与算例都表明，本文方法精度较高，而计算又不过于复杂。

Geometrical and Material Nonlinear Analysis of Space Steel Frames

Based on the virtual work increment equation for the three dimensionalcontinum and stress-resultant yield surface plastic rule,the updated Lagrangian formulation is developed,and a new type of geometric stiffness matrix is presented.The numerical examples verify that the theoretical methd derived in this paper has very highprecision and efficieney.