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新型冷弯薄壁型钢屋架结构承载力分析
引用本文:刘飞,李元齐,沈祖炎.新型冷弯薄壁型钢屋架结构承载力分析[J].华侨大学学报(自然科学版),2009,30(6).
作者姓名:刘飞  李元齐  沈祖炎
作者单位:同济大学,建筑工程系,上海,200092
基金项目:国家自然科学基金资助项目(50878168)
摘    要:基于已完成的G550冷弯薄壁型钢屋架结构承载力试验,采用通用有限元软件ANSYS,建立考虑材料和几何非线性的分析模型.分析结构的特征值屈曲和非线性屈曲承载能力,通过对比试验数据结果,研究屋架结构的合理分析模式.结果表明,屋架结构的破坏模式为上弦杆的整体弯扭屈曲,与试验观测到的现象一致,极限承载力和试验结果非常接近.研究表明,有限元分析模型设计合理,节点处自由度耦合的手段能模拟自攻螺钉连接的受力情况.

关 键 词:冷弯薄壁型钢  屋架结构  极限承载力  非线性屈曲  数值模拟  有限元  

Analysis on Load-Carrying Capacity of New Cold-Formed Thin-Walled Steel Roof Truss
LIU Fei,LI Yuan-qi,SHEN Zu-yan.Analysis on Load-Carrying Capacity of New Cold-Formed Thin-Walled Steel Roof Truss[J].Journal of Huaqiao University(Natural Science),2009,30(6).
Authors:LIU Fei  LI Yuan-qi  SHEN Zu-yan
Institution:Department of Building Engineering;Tongji University;Shanghai 200092;China
Abstract:Based on the experiments of G550 cold-formed thin-walled steel roof truss structures,an analysis model considering geometry and material non-linearity is established using general FEM software ANSYS.Both eigenvalue buckling and non-linear stability analysis of this structure are performed,a reasonable analysis model for roof truss structure is studied by comparing with test data.The results showed that the failure mode of roof truss is flexual-torsional buckling of top chord members,which accords with the p...
Keywords:cold-formed thin-walled steel  roof truss structure  ultimate load-bearing capacity  non-linear buckling  numerical simulation  finite element method  
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