摘要
基于有限变形理论 ,考虑截面翘曲变形影响 ,推导了空间闭口薄壁箱型梁的UL列式增量平衡方程 ,建立了薄壁箱型梁的非线性稳定计算方法 ,并编制了相应的程序 .将架桥机的两个单梁换算为等效闭口箱型梁 。
In this paper a new formulation for the large_displacement elastic_plastic analysis of spatial steel frame is presented. Based on the virtual work equation of closed thin_walled beam accounted for warping deformation of the section, the proposed formulation is derived in UL formulation. And a program is developed to analyze the closed thin_walled section beam structure. By using the proposed approach, the spatial steel trusses for girder erection machine are converted into two thin_walled beams, and then the limit load and lateral buckling of steel truss is calculated.
出处
《华南理工大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2000年第5期48-53,共6页
Journal of South China University of Technology(Natural Science Edition)
关键词
钢桁架
架桥机
极限荷载分析
承载力
侧倾稳定
steel truss
girder erection machine
limit load
lateral stability
closed thin_walled beam