<strong>C</strong>形截面檩条在风吸力作用下的整体稳定分析

童根树; 徐媛杰; 张磊

doi:10.13204/j.gyjz201312005

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C形截面檩条在风吸力作用下的整体稳定分析

doi: 10.13204/j.gyjz201312005

1.
浙江大学建筑工程学院,杭州 310058

详细信息

作者简介:
童根树，男，1963年出生，博士，教授，博士生导师。电子信箱:tonggs@ccea.zju.edu.cn

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- 文章访问数: 105
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- 被引次数: 0
出版历程
- 收稿日期: 2013-08-04
- 刊出日期: 2013-12-20

ANALYSIS OF GLOBAL STABILITY OF C-PURLINS UNDER WIND SUCTION

1.
Department of Civil Engineering,Zhejiang University,Hangzhou 310058,China

摘要

摘要: 采用开口薄壁构件理论,推导了上翼缘受约束的C形截面简支檩条在风吸力作用下发生弯扭屈曲的总势能,提出无拉条檩条的临界弯矩表达式,并与采用ANSYS板壳单元建模的结果进行对比。给出了不考虑屈曲前变形影响的临界弯矩公式,将其与EC3方法及试验结果对比,表明EC3的方法偏保守,而所提公式简单,计算长度系数比EC3的小10%,承载约高20%。
- 檩条 /
- 整体稳定 /
- 临界弯矩
Abstract: Using the theory of thin-walled members，this paper derived the total potential for bending and torsional buckling of C purlins under wind suction，the expression of the critical moments of the purlins was proposed，whose results were compared with those of ANSYS model. The critical moment formula without taking account of deformation effect before buckling was given，and the possible use of the model and the formulas were pointed out by comparing EC3 method with the test results，showing that EC3 method was conservative，yet the proposed formula was simple, whose calculated length coefficient was 10% smaller and bearing capacity was about 20% higher than EC3 method.
- purlin /
- overall stability /
- critical moment

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参考文献(6)

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[3] Toma T,Wittemann K.Design of Cold-Formed Purlins and GirtsRestrained by Sheeting ［J].Journal of Constructional SteelResearch, 1994, 31(2):149-168.

[4] Sokol L.Stability of Cold-Formed Purlins Braced by Steel Sheeting[J].Thin Walled Structures, 1996, 25(4):247-268.

[5] 童根树.钢结构的平面外稳定(修订版)［M].北京:中国建筑工业出版社, 2013.

[6] Eurocode 3.Part 1-3: General Rules-Supplementary Rules forCold-Formed Members and Sheeting[S].2006.

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