用于钢框架结构二阶分析的一种实用塑性区数值模型  

A numerical model for second-order distributed plasticity analysis of steel frame structures

作　　者：王柯[1] 李天[2] 张猛[2] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]郑州大学土木工程学院,河南郑州450000

出　　处：《世界地震工程》2008年第3期49-53,共5页World Earthquake Engineering

基　　金：国家"十五"科技攻关项目(2002BA806B-4-3)

摘　　要：提出了一种基于有限元的考虑初始缺陷的塑性区模型,详细介绍了这种模型的单元类型、网格密度、材料属性、边界条件、求解方法以及残余应力和初始几何缺陷的施加,并通过和经典的Vogel框架计算结果的对比,验证了模型的可靠性。并利用这种模型分析了初始缺陷对于钢框架二阶弹塑性受力性能的影响。This paper provides an efficient numerical model of steel frames using second-order distributed plasticity FEM(finite element method).Details of the model including element type,mesh discretization,material model,boundary conditions,solution method,residual stresses and initial geometric imperfections are presented.Its validity is verified by two classic cases.At last,using this FEM model,the effects of the geometric imperfections can be obtained during the second-order inelastic analyses of the steel frame...

关 键 词：钢框架 二阶分析 有限元 初始几何缺陷 残余应力 

分 类 号：TU391[建筑科学—结构工程]