摘要
空间网格结构以其优美的形态和良好的结构受力性能,深受建筑师和结构工程师喜爱。对于多层空间网壳结构的分析,一般假定单元为轴心受力构件。构件在加工、运输过程中不可避免地会引入缺陷,且实际缺陷难以一一测量。同时,单元的屈曲对于结构整体受力性能影响较大。因此,本文在假定缺陷模式的情况下,借助Matlab编程语言对SAP2000进行了二次开发,给结构单元引入缺陷模式进行了屈曲分析。分析结果表明,3种缺陷模式对于轴心受力构件弹性屈曲荷载的影响相差不大,钢结构设计标准假定的半正弦波缺陷具有可行性。
Space latticed structure,which is pretty beautiful in shape and has excellent load-carrying capacity,is widely used in civil and industrial buildings.When analyzed based on finite element method,elements of double layer space grids are assumed to be pin-ended.In practical,imperfection will be inevitably introduced into members of space truss while they are manufactured and transported,however,it is hard to measure all the defects within members.And in the meantime,the buckling of members will affect the overall performance of space truss structure.Therefore,three kinds of imperfection modes are introduced in present paper and buckling analysis is performed based on SAP2000 and the interaction with Matlab.Results in this study show that there are no huge differences of the linear buckling load among three kinds of imperfection modes,and the imperfection mode of half sine recommended by code is practical.
作者
石飞宇
王孟鸿
SHI Feiyu;WANG Menghong(School of Civil Engineering and Transportation,Beijing University of Civil Engineering and Architecture,Beijing100044,China)
出处
《四川建筑科学研究》
2021年第2期35-40,共6页
Sichuan Building Science
基金
北京建筑大学研究生创新项目(PG2020029)。
关键词
缺陷模式
屈曲分析
SAP2000二次开发
imperfection modes
buckling analysis
secondary development of SAP2000
