建筑结构学报2012，Vol.33Issue(12)：63-71,9.
杆件初弯曲对网壳结构弹塑性稳定性能影响研究
Research on influence of initial curvature of members on elasto-plastic stability of reticulated shells
摘要
Abstract
To investigate the influence of initial curvature of members on the elasto-plastic stability of single-layer reticulated shell structures,the multi-beam method was adopted to model the initial curvature of members,and based on the FEA package ANSYS,two methods were proposed to introduce the initial curvature of members of reticulated shells.According to the randomness of initial curvature of members,the random imperfection mode method was presented.Taking a Kiewitt-8 dome as an example explained the simulation process of the random imperfection mode method,and investigate the influence of direction angle and amplitude random variables of initial curvature of members on the stability of the reticulated shell structure.From the result of the random imperfection mode method,the modified consistent imperfection mode method was established.Then,based on this method,the stability of the Kiewitt-6,Kiewitt-8 and geodesic single-layer reticulated shells considering the influence of initial curvature of members were analyzed.For the structure without and with nodes deviation,the influences of initial curvature of members on the bearing capacity of the structures were obtained quantitatively.The results show that,for the structure without and with nodes deviation,the initial curvature of members can decrease the bearing capacity of the structure obviously,and change the degree of plasticity development of the structure.The influence of initial curvature of members on the elasto-plastic stability of single-layer reticulated shells cannot be neglected,and the modified consistent imperfection mode method is effective to estimate the lower bearing capacity of the reticulated shell structures considering the influence of initial curvature of members.关键词
单层网壳/稳定/杆件初弯曲/有限元分析/承载力Key words
single-layer reticulated shell/stability/initial curvature of member/FEA/bearing capacity分类
建筑与水利引用本文复制引用
严佳川,范峰,曹正罡..杆件初弯曲对网壳结构弹塑性稳定性能影响研究[J].建筑结构学报,2012,33(12):63-71,9.基金项目
国家自然科学基金面上项目 （）
黑龙江省青年科学基金项目 （）
黑龙江省博士后科研启动基金项目 （）
