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受弯H型面钢梁腹板屈曲后强度的简化计算方法
宁海永,张 宁,唐开春
摘 要

宁海永,张  宁,唐开春
(中国纺织工业设计院,北京100037)

[摘要] 在非动力荷载直接作用的钢结构工程中,当梁腹板高厚比较大时,一般要考虑腹板屈曲后强度。文中详细论述了屈曲后强度的适用条件、机理和有效刚度计算方法,文中的计算方法与《钢结构设计规范》(GB50017--2003)中的计算方法进行比较,计算结构基本一致,能满足工程设计的精度要求,对实际工程设计具有参考意义。
[关键词] 屈曲后强度;钢结构;局部稳定;有效刚度

Simple calculation of H-shaped section beam post-buckling strength
Ning Haiyong,  Zhang Ning,  Tang Kaichun
(China Textile Industrial Engineering Institute, Beijing 100037,  China)

Abstract: According to the flexural beam in steel buildings, if it's without dynamic loading, and when the web slenderness ratio of beam is bigger, the post-buckling strength of web plate should be considered. in this article, the applicable condition, mechanism and the post-buckling effective stiffness will be discussed. Comparing it with the method in the code for design of steel structures( GB 50017-2003) of china, the results are approaching basicallylt can be reference for the practical engineering design.
Keyword: post-buckling strength; steel structure; local stability effective stiffness

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