冷弯薄壁卷边槽钢畸变屈曲承载力的计算方法比较

Industrial Construction(2013)

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Abstract
冷弯薄壁卷边槽钢在受力过程中除可能出现整体屈曲和局部屈曲外,还可能出现畸变屈曲。发生畸变屈曲会恶化构件的受力性能,从而降低构件的极限承载力。比较研究了5个国家或地区规范针对畸变屈曲的设计计算方法,并对最新的畸变屈曲承载力计算方法研究成果进行归纳,最后就既有的5种考虑畸变屈曲的承载力计算方法与有关试验进行对比分析,结果表明:北美规范采用的直接强度法适用范围广且精度相对较高。
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Key words
direct strength method,distortional buckling,lipped channel sections,ultimate bearing capacity,cold-formed steel,method of calculation
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