|本期目录/Table of Contents|

[1]郭彦林,姜子钦.纯弯等截面焊接工字形梁整体稳定系数研究[J].建筑科学与工程学报,2012,29(02):89-95.
　GUO Yan-lin,JIANG Zi-qin.Research on Lateral Stability Factor of Welded I-section Beams Under Pure Moment[J].Journal of Architecture and Civil Engineering,2012,29(02):89-95.
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纯弯等截面焊接工字形梁整体稳定系数研究(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
29卷
期数:
2012年02期
页码:
89-95
栏目:
出版日期:
2012-06-30

文章信息/Info

Title:
Research on Lateral Stability Factor of Welded I-section Beams Under Pure Moment
作者:
郭彦林,姜子钦
清华大学 土木工程系,北京 100084
Author(s):
GUO Yan-lin, JIANG Zi-qin
Department of Civil Engineering, Tsinghua University, Beijing 100084, China
关键词:
纯弯矩;  等截面焊接工字形梁;  整体稳定系数;  初始几何缺陷;  残余应力
Keywords:
pure moment;  welded I-section beam;  lateral stability factor;  initial geometric imperfection;  residual stress
分类号:
TU317
DOI:
-
文献标志码:
A
摘要:
为配合《钢结构设计规范》(GB 50017—2003)的修订工作,对纯弯等截面焊接工字形梁的整体稳定系数进行了研究。对各国钢结构规范中关于梁整体稳定系数问题的计算方法做了简要介绍,比较了各国规范对焊接工字形梁稳定承载力计算结果的差异; 对等端弯矩作用下等截面焊接工字形梁的整体稳定性进行了大量数值模拟,其中考虑了梁构件的初始几何缺陷及残余应力分布。通过对比正则化长细比与梁整体稳定系数曲线可以发现,现行《钢结构设计规范》在计算梁稳定系数时对构件初始几何缺陷及残余应力考虑不足,规范计算结果在较大范围内高出有限元数值分析结果,会产生不安全的设计,故建议对规范公式进行修订。
Abstract:
Authors presented the study of lateral stability factor of the pure moment for the revision of current Code for Design of Steel Structures(GB 50017—2003). The calculation methods of the beam lateral stability factor in several countries' codes were introduced. Then, the differences of calculation results for the lateral stability capacities of welded I-section beams were compared according to several countries' codes. The numerical analysis by using shell element for the lateral stability of welded I-section beams under pure moment was carried out, in which both initial geometric imperfection and residual stress of the beams were considered. By comparing the normalized slenderness ratios and the beam lateral stability factor curves, it can be found that lateral stability coefficient from GB 50017—2003 is far higher than the finite element numerical analysis result. It will lead to unsafe design, so the revision to it should be done.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2012-04-07
作者简介:郭彦林(1958-),男,陕西富平人,教授,博士研究生导师,工学博士,E-mail:gyl@tsinghua.edu.cn。
更新日期/Last Update: 2012-06-20