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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

26卷

期数:

2009年03期

页码:

27-31

栏目:

出版日期:

2009-09-20

文章信息/Info

Title:

Local Buckling Analysis of Web of Continuous Steel-concrete Composite Beam

作者:

蒋丽忠¹,曾丽娟¹,孙林林²

1.中南大学土木建筑学院,湖南长沙410075;2.江苏省交通科学研究院股份有限公司,江苏南京210017

Author(s):

JIANG Li-zhong¹, ZENG Li-juan¹, SUN Lin-lin²

1. School of Civil Engineering and Architecture, Central South University, Changsha 410075, Hunan, China; 2. Jiangsu Transportation Research Institute Co., Ltd, Nanjing 210017, Jiangsu, China

关键词:

钢-混凝土连续组合梁;  稳定承载力;  屈曲模型;  局部屈曲;  高厚比

Keywords:

continuous steel-concrete composite beam;  bearing capacity of stability;  buckling model;  local buckling;  height to thickness ratio

分类号:

TU398

DOI:

-

文献标志码:

A

摘要:

对连续组合梁负弯矩区钢腹板的稳定性进行了研究,分析了负弯矩区钢梁腹板在弯曲、轴向压力和剪切作用下的力学性能,提出了组合梁腹板在各种荷载作用下的局部稳定性简化计算模型,建立了非均匀受压、纯剪和弯剪复合受力状态下的临界屈曲应力计算公式; 分别计算了钢梁腹板在非均匀受压和纯剪状态下的弹性屈曲系数,并根据偏心受压与剪切作用下的相关方程计算了钢梁腹板在复杂应力状态下的弹性屈曲系数; 基于屈曲分析结果,提出了组合梁在弹性受力阶段钢梁腹板不设横向加劲肋的高厚比限值。结果表明:采用该方法确定的钢梁腹板高厚比更具合理性,且计算过程简单,结果偏于安全。

Abstract:

The stability of steel web in negative moment area of the continuous composite beam was studied. The mechanical behaviors of steel web in negative moment area under the load of bending, axial pressure and shear were analyzed, and a simplified model for calculating the local stability of web of composite beam under different loads was proposed, and formulas were also formed for calculating critical buckling stress under the load of non-uniform compression, shear and complicated stress loads of bending and shear. The elastic buckling factors under the load of non-uniform compression and shear were separately calculated. The elastic buckling factor under the complicated stress load of bending and shear was calculated according to interaction equation of eccentric compression and shear. Based on results of the buckling analysis, the limiting height to thickness ratio was also determined for webs without stiffening ribs in the elastic stage based on the critical buckling load. The results show that the method is more reasonable for determining height to thickness ratio of steel web of beam, and the calculating process is simple, the result is on safe side.

参考文献/References:

[1] 陈世鸣.钢-混凝土连续组合梁负弯矩区的局部失稳[J].建筑结构学报,1995,16(6):30-37. CHEN Shi-ming.Local Buckling of Continuous Composite Beam at Hogging Moment Region[J].Journal of Building Structures,1995,16(6):30-37.
[2]夏志斌,潘有昌.结构稳定理论[M].北京:高等教育出版社,1988:35-147. XIA Zhi-bin,PAN You-chang.Theory of Structural Stability[M].Beijing:Higher Education Press,1988:35-147.
[3]王国周,瞿履谦.钢结构原理与设计[M].北京:清华大学出版社,1993:35-148. WANG Guo-zhou,QU Lu-qian.Principle and Design of Steel Structures[M].Beijing:Tsinghua University Press,1993:35-148.
[4]陈绍蕃.钢结构稳定设计指南[M].北京:中国建筑工业出版社,1996:215-322. CHEN Shao-fan.Guide to Stability Design of Steel Structures[M].Beijing:China Architecture & Building Press,1996:215-322.
[5]李廉锟.结构力学[M].4版.北京:高等教育出版社,2004:31-150. LI Lian-kun.Structure Mechanics[M].4th ed.Beijing:Higher Education Press,2004:31-150.
[6]GB 50017-2003,钢结构设计规范[S]. GB 50017-2003,Code for Design of Steel Structures[S].
[7]樊健生,聂建国,吴道闻.钢-混凝土组合梁弹性屈曲的力学性能[J].清华大学学报:自然科学版,2004,44(6):786-788. FAN Jian-sheng,NIE Jian-guo,WU Dao-wen.Mechanical Behavior of Elastic Buckling of Composite Steel Concrete Beams[J].Journal of Tsinghua University:Science and Technology,2004,44(6):786-788.

相似文献/References:

[1]周天华,何保康,周绪红,等.高强冷弯薄壁型钢轴压长柱受力性能试验研究[J].建筑科学与工程学报,2005,22(04):65.
　ZHOU Tian-hua,HE Bao-kang,ZHOU Xu-hong,et al.Experimental research on bearing capacity of high-strength cold-formed thin-walled steel long columns[J].Journal of Architecture and Civil Engineering,2005,22(03):65.

备注/Memo

备注/Memo:

收稿日期:2009-06-14
基金项目:国家自然科学基金项目(50778177); 湖南省杰出青年基金项目(07JJ1009)
作者简介:蒋丽忠(1971-),男,湖南衡山人,教授,博士研究生导师,工学博士,E-mail:lzhjiang@mail.csu.edu.cn。

常用功能

更新日期/Last Update: 2009-09-20