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

卷:

22卷

期数:

2005年03期

页码:

36-44

栏目:

出版日期:

2006-09-20

文章信息/Info

Title:

Experimental research on bearing capacity of high-strength cold-formed steel stub columns

作者:

周天华¹,何保康²,周绪红¹,刘永健³,王彦敏⁴

1. 长安大学 建筑工程学院,陕西 西安 710061; 2. 西安建筑科技大学 土木工程学院,陕西 西安 710055; 3. 长安大学 公路学院,陕西 西安 710064; 4. 博思格建筑系统,上海 201613

Author(s):

ZHOU Tian-hua¹, HE Bao-kang², ZHOU Xu-hong¹, LIU Yong-jian³, WANG Yan-min⁴

1. School of Architectural Engineering, Chang'an University, Xi'an 710061, China; 2. School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; 3. School of Highway, Chang'an University, Xi'an 710064, China; 4. Bluescope Buildings, Shanghai 201613, China

关键词:

高强冷弯薄壁型钢;  短柱;  试验研究;  有效宽度

Keywords:

high-strength cold-formed steel;  stub column;  experimental research;  effective width

分类号:

TU392.5

DOI:

-

文献标志码:

A

摘要:

为了验证壁厚小于1 mm的G550级高强钢材对中国《冷弯薄壁型钢结构技术规范》(GB 50018-2002)相关设计规定的适应性,进行了30根冷弯薄壁型钢方管截面轴压短柱的试验研究,试件的壁厚均为0.6 mm、宽厚比为20～150。试验结果表明:当宽厚比较小时(b/t≤40),试件的初始缺陷和高强钢材本身特性对构件承载力的影响较大,试件材料的强度得不到充分发挥; 当宽厚比较大时(b/t>40),高强钢材局部屈曲和有效截面是影响构件承载力的主要因素。通过对试验结果和各国规范计算结果的对比分析,给出了高强冷弯薄壁型钢构件按中国规范GB 50018-2002计算有效宽度的建议。

Abstract:

In order to verify the adaptability of Chinese Technical Code of Cold-formed Thin-wall Steel Structures GB 50018-2002 for the grade G550 high-strength steel of wall thickness less than 1 mm, the 30 specimens of cold-formed steel stub columns had been tested under axial compression loading. The wall thickness of specimens are all 0.6 mm and the ratios of width to thickness are from 20 to 150. The experimental results show that initial imperfections and material properties are major influence factors for bearing capacity of specimens with low ratios of width to thickness(b/t≤40), and local buckling and effective section are major influence factors for bearing capacity of specimens with high ratios of width to thickness(b/t>40). Through comparing the test results with the design specifications of Chinese code GB 50018-2002 and other countries', the suggestions of calculating effective width for the grade G550 high-strength steel by Chinese code GB 50018-2002 are presented.

参考文献/References:

[1] YANG De-mao, HANCOCK G J. Compression tests of cold-reduced high strength steel sections:I-stub columns[J].Journal of Structural Engineering, 2004,130(11):1 772-1 781.
[2] GB 50018-2002,冷弯薄壁型钢结构技术规范[S].
[3] GALAMBAS T V,JOHN W,SONS.Structural Stability Research Council,Guide to Stability Design Criteria for Metal Structures[M].New York:John Wiley and Sons,1976.
[4] 周天华,周绪红,何保康,等.G550级高强薄板钢材的材性试验研究[J].建筑科学与工程学报,2005,22(2):58-61.
[5] AISI/COS/NASPEC,North American Specification for the Design of Cold-formed Steel Structural Members[S].
[6] American Iron and Steel Institute.Specification for the Design of Cold-formed Steel Structural Members[M].Washington D C:AISI,1996.
[7] AS/NZS 4600,Cold-formed Steel Structures[S].

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备注/Memo

备注/Memo:

收稿日期:2005-03-16
作者简介:周天华(1963-),男,陕西西乡人,长安大学副教授,工学博士.E-mail:zhouth@chd.edu.cn

常用功能

更新日期/Last Update: 2006-09-20