【摘要】 从三维空间钢结构的整体稳定分析要求出发,基于更新的Lagrange构形虚位移原理,本文推导了一种新型的三维空间薄壁构件切线单元刚度矩阵.推导中考虑了截面翘曲的影响,对于拉、压、弯构件,分别取其微分方程的解作为形函数.并编制了相应的非线性分析计算程序(XJDAAST-HB),该程序可以用来进行三维空间钢结构的整体稳定分析,也可以用来进行三维空间钢结构的荷载-位移曲线跟踪分析.经算例比较,表明了该方法的有效性和对钢结构整体稳定分析的适用性.更多还原

【Abstract】 On riew of the demand of steel structure buckling analysis,this thesis has derived a new thin-wall element stiffness matrix in 3-D space based on the thin-wall structure theory,with the section warping considered in the process adopting a different shape function for pull, press and bending component.The authors of this thesis compiled a non-line analysis program(XJDAAST-HP).The program can be applied for an analysis on steel structure buckling of three dimension space,and can heep draw out the load-displacement curve.The computing efficiency and accuracy of the method is illustrated by some numerical examples.更多还原