残余应力分布对焊接不锈钢工字形截面梁整体稳定性能的影响

王元清; 高博; 戴国欣; 石永久

doi:10.13204/j.gyjz2011205008

残余应力分布对焊接不锈钢工字形截面梁整体稳定性能的影响

doi: 10.13204/j.gyjz2011205008

1.
1. 清华大学土木工程系,土木工程安全与耐久教育部重点实验室北京 100084;
2.
2. 中国建筑西南设计研究院有限公司成都 610081;
3.
3. 重庆大学土木工程学院重庆 400045

基金项目:

北京市自然科学基金项目(8112018);国家自然科学基金项目(51108007)

详细信息

作者简介:
王元清，男，1963年出生，教授，博士生导师。

中图分类号: TU391
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- 被引次数: 0
出版历程
- 收稿日期: 2011-12-10
- 刊出日期: 2012-05-20

INFLUENCES OF RESIDUAL STRESS ON INELASTIC LATERAL- TORSIONAL BUCKLING OF WELDED I- BEAMS

1.
1. Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry,Department of Civil Engineering,Tsinghua University,Beijing 100084,China;
2.
2. China Southwest Architectural Design and Research Institute Co.Ltd,Chengdu 610081,China;
3.
3. Faculty of Civil Engineering,Chongqing University,Chongqing 400045,China

摘要

摘要: 焊接残余应力导致不锈钢梁截面纤维过早达到屈服,并严重降低不锈钢梁的抗弯刚度。为了研究残余应力对焊接工字形不锈钢梁侧扭屈曲的影响,根据目前被广泛采纳的不锈钢工字形截面残余应力分布模型,采用有限元方法,对残余应力分布模型的主要因素进行参数化分析,研究这些因素对不锈钢梁侧扭屈曲的影响,使对焊接工字形不锈钢梁的整体稳定性能的研究更加完善。结果表明:翼缘残余压应力峰值对不锈钢梁侧扭屈曲的影响最为显著。
- 残余应力 /
- 不锈钢 /
- 焊接工字梁 /
- 侧扭屈曲
Abstract: The influence of residual stress on stainless steel beams is to cause premature yield and loss of flexural stiffness.The influences of magnitudes and distribution of residual stress on the lateral buckling are therefore important for stainless steel welded I-beams.The influencing factors analysis on the inelastic lateral buckling behavior of the beams was presented by adopting the widely approval model of residual stress.This paper improves the investigation on the overall buckling behavior and the results show that the amplitude of compression stress in flange performs the significant effect．
- residual stress /
- stainless steel /
- welded I beams /
- lateral-torsional buckling

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参考文献(7)

Gardner L，Cruise R B. Modeling of Residual Stresses in Structural Stainless Steel Sections [J]. Journal of Structural Engineering，2009，135(1): 42-53.

[2] 王元清，高博，戴国欣，等. 焊接工字形截面不锈钢受弯构件的整体稳定性分析[J]. 沈阳建筑大学学报:自然科学版，2010，26(6):1021-1026.

[3] Wang Yuanqing，Gao Bo，Dai Guoxin. Numerical Analysis of Overall Stability of Unbraced Stainless Steel Simply-Supported Beams with Fabricated I-Section[C]∥Processing on International Conference on Electric Information and Control Engineering. Wuhan: 2011.

[4] 王元清，高博，戴国欣，等. 双轴对称不锈钢受弯构件残余变形的影响因素分析[J]. 山东大学学报:工学版，2011，41(1): 1-6.

[5] Lagerqvist O，Olsson A. Residual Stresses in Welded I-Girders Made of Stainless Steel and Structural Steel[C]∥ Proceedings of the Ninth Nordic Steel Construction Conference. Finland: 2001: 737-744.

[6] Ashral M，Gardner L，Nethercot D A. Finite Element Modeling of Structural Stainless Steel Cross Sections [J]. Thin-Walled Structures，2006，44(10):1048-1062.

[7] 夏志斌，潘有昌，张显杰. 焊接工字形钢梁在纯弯时的非弹性侧扭屈曲[J]. 浙江大学学报，1985，4(增刊):93-109.

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