冷弯<strong>C</strong>型或<strong>Z</strong>型钢截面轴压时的局部屈曲和畸变屈曲

张水根; 童根树; 张磊

doi:10.13204/j.gyjz201312007

冷弯C型或Z型钢截面轴压时的局部屈曲和畸变屈曲

doi: 10.13204/j.gyjz201312007

1.
1. 华汇工程设计集团股份有限公司,浙江绍兴 312000;
2.
2. 浙江大学高性能材料与结构研究所,杭州 310058

详细信息

作者简介:
张水根，男，1960年出生，高级工程师。电子信箱:zhang-sg@huahuigroup.com

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出版历程
- 收稿日期: 2013-08-04
- 刊出日期: 2013-12-20

LOCAL AND DISTORTIONAL BUCKLING OF COLD-FORMED C AND Z-SECTION MEMBERS UNDER BENDING

1.
1. Huahui Engineering Design Group,Shaoxing 312000,China;
2.
2. Institute of High-Performance Materials and Structures,Zhejiang University,Hangzhou 310058,China

摘要

摘要: 对C型或Z型檩条受弯时的畸变屈曲进行分析,指出了目前澳大利亚和美国规范采用薄壁构件理论分析畸变屈曲的方法,过高估计了翼缘-卷边的刚度,因而采用降低腹板对翼缘约束的方式,使得结果符合有限条方法的结果。通过采用卷边等效抗弯刚度,对翼缘采用板件理论研究,推导了腹板对翼缘的约束刚度计算公式,并将其用于翼缘-卷边的畸变屈曲计算和局部屈曲计算,与有限元方法的计算结果对比表明,得到的屈曲系数精度良好且偏安全。
- 局部屈曲 /
- 畸变屈曲 /
- 冷弯型钢
Abstract: It was analyzed the distortional buckling of the C and Z sections under bending. In the current Australian and American codes the thin-walled member theory is used to analyze the distortional buckling loads. In this method a reduced restraining rigidity of web to flange is adopted because such a model overestimates the rigidity of flange-lip section. It was derived the formulas to calculate restraining rigidities of web to flange, by using the equivalent bending rigidity of the lip，as well as the theory of plate element，which were used to calculate the local and distortional bucklings of flange-lip sections，whose results were compared with those of FEM，by which the buckling factors had excellent accuracy，and they were on the safe side.
- local buckling /
- distortional buckling /
- cold-formed section steel

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参考文献(9)

张水根, 童根树, 张磊.冷弯 C 型或 Z 型钢截面轴压时的局部屈曲和畸变屈曲[J].工业建筑, 2013, 43(12):38-44.

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[5] 吕烈武, 沈世钊, 沈祖炎, 等.钢结构构件稳定理论［M].北京:中国建筑工业出版社, 1983.

[6] GB 500182002 冷弯薄壁型钢结构技术规范［S].

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[8] Haidarali M R,Nethercot D A.Local and Distorsional Buckling ofCold-Formed Steel Beams with Edge-Stiffened Flanges ［J].Journal of Constructional Steel Research, 2012, 73(1):31-42.

[9] Yu Cheng, Yan Weiming.Effective Width Method for DeterminingDistortional Buckling Strength of Cold-Formed Steel Flexural C andZ Sections［J].Thin-Walled Structures,2011,49 (3):233-238.

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