摘要
对多层钢框架进行了弹塑性非线性分析，分析中考虑了塑性区沿截面高度及杆件轴线方向上的扩展，截面上任一点的屈服判定是以应变作为参数的．基于能量原理，文章导出了弹塑性梁单元的割线刚度矩阵并编制了用以计算钢框架荷载一位移性能的有限元程序．分析结果与国外试验结果及其它分析结果进行了比较，吻合良好．
Taking the gradual expansion of yielding both across the section and along the axis of the member into considemtion, this paper deals with the inelastic nonlinear analysis of sted frames. Strain is used as a parameter to estimate whether an arbitrary point on a section is elastic or not in the analysis. Based on the principle of energy, a secant stiffness matrix of inelastic member is derived and a finite element program used to evaluate the load- deformation characteristic of steel frames is developed. Comparisons are made with exprimental results and analysis results available abroad, and the agreement is satisfactory.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
1995年第5期488-492,共5页
Journal of Tongji University:Natural Science
基金
国家教委博士点基金
关键词
钢结构
框架
塑性区扩展
二阶分析
Steel frame
Expansion of yielding
Second-order analysis
