钢结构几何缺陷的直接分析方法  

A Direct Imperfection Analysis Method for Steel Structures

作　　者：周奎[1] 宋启根[2] 

机构地区：[1]上海理工大学城市建设与环境工程学院,上海200093 [2]东南大学土木工程学院,南京210096

出　　处：《建筑钢结构进展》2007年第1期57-62,共6页Progress in Steel Building Structures

基　　金：上海市教委青年科学基金项目资助(Q30602)

摘　　要：本文介绍了结构几何缺陷的几种处理方法,导出了一种显式的缺陷分析模型,将构件初始缺陷直接引入到单元位移插值函数中,可以同时考虑缺陷以及单元横向荷载引起的二阶效应。分析表明对于构件数较少且缺陷敏感型结构,局部缺陷的影响显著;而对于构件数较多的复杂结构系统,局部缺陷的影响是局部的。给出的几个数值算例表明了本文模型的高效性和准确性,计算结果可直接用于设计,而无需进行构件验算和长度系数的计算。In this paper, the methods of considered imperfections are presented,and a direct explicit imperfection analysis model is derived. It can consider the second-order effect of the imperfection and second-order effect due to member force. The influence of local imperfection is predominant for the imperfection-sensitive structures and it will be local for the complicated structures with lots of components. The validity of the method proposed is verified by several numerical examples, which can be used directly for design. The members check and the effective length factor K can then be no use when using the method proposed for design.

关 键 词：钢框架 几何缺陷 直接缺陷模型 

分 类 号：TU318[建筑科学—结构工程]