EVALUATION OF WIDTH-THICKNESS RATIO LIMITATION OF H-SHAPED BEAM MEMBERS BASED ON COUPLED BUCKLING ANALYSIS
EVALUATION OF WIDTH-THICKNESS RATIO LIMITATION OF H-SHAPED BEAM MEMBERS BASED ON COUPLED BUCKLING ANALYSIS
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基于耦合屈曲分析的H型梁构件宽厚比限制评估
DOI：
10.3130/aijs.73.1177
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Tao Wang
中科院分区：
文献类型：
--
作者：
K. Ikarashi;Tao Wang
现行标准通过考虑纯压缩或纯剪切情况下的边界条件和应力状况来定义薄板的宽厚比限值。一方面，考虑到弯曲力的影响，在很多H型钢梁未发生整体屈曲的情况下，可以使用较大宽厚比的薄板。另一方面，对于大跨度且易受整体屈曲影响的由薄壁薄板组成的H型钢梁，可能会出现高估的情况。本文基于前人采用能量法进行的耦合屈曲分析，研究对受弯和受剪的H型钢梁构件宽厚比限值的合理评估，并提出一种简便的评估方法。
Width-thickness ratio limitation of thin plate is defined in current standard by considering boundary condition and stress situation under either pure compression or pure shear. On one hand, considering the effect of bending force, the larger width-thickness ratio of thin plate is able to be used in many cases of H-shaped beams when overall buckling does not happen. On the other hand, overestimation may be caused in cases of light-gauge thin plates formed H-shaped beams with long span which are easily affected by overall buckling. This paper is to study the proper evaluation of limitation about width-thickness ratio of H-shaped beam members under bending and shear based on the coupled buckling analysis in previous studies by energy method, and an easy evaluation method is proposed.