期刊文献+

冷弯薄壁卷边槽钢组合工字梁极限承载力计算的折减强度法 被引量:8

STRENTH-REDUCTION METHOD FOR LOAD-CARRYING CAPACITY OF COLD-FORMED STEEL COMPOSITE I-BEAM
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摘要 为了研究冷弯薄壁卷边槽钢组合工字梁的受弯性能,对3种截面形式共计9根卷边槽钢组合工字梁进行了破坏性试验研究,并采用有限元方法对试件进行模拟分析,有限元计算结果与试验结果吻合良好,验证了该文有限元方法的有效性。然后对典型截面梁构件进行了大量的参数分析,研究结果表明:随着钢材强度提高、梁长度减小、腹板高厚比和翼缘宽厚比增加,梁的极限承载力增加。最后在参数分析的基础上,提出了计算冷弯薄壁型钢梁极限承载力的折减强度法及其相应的计算公式,并通过试验验证了该文折减强度法计算梁极限承载力的适用性。 In order to investigate the bending behavior of cold-formed steel I-beams, a total of 9 cold-formed I-beams with three different sections were tested. And tests were simulated by finite element analysis. The well fitting between finite element analysis and test results proves the validity of the finite element method in this paper. Then a large number of parametric analyses were carried out through the finite element analysis on typical members and the following conclusions can be obtained: with the increase of steel strength, the decrease of beams' length, the increase of height-to-thickness ratio of the web and width-to-thickness ratio of flanges, the members' load-carrying capacity increases. Finally, strength-reduction method for the ultimate load-carrying capacity of cold-formed I-beam was proposed, and the ultimate load-carrying capacity from this method agrees well with the experiment results, so the strength-reduction method in this paper is valid and can be applied to practical engineering.
出处 《工程力学》 EI CSCD 北大核心 2011年第9期174-182,共9页 Engineering Mechanics
基金 国家自然科学基金项目(50978128) 中央高校科研专项基金项目 长安大学基础研究专项基金项目(CHD2009JC036)
关键词 冷弯薄壁型钢 卷边槽钢 组合工字梁 极限承载力 折减强度法 cold-formed steel lipped channel composite I-beam ultimate load-carrying capacity strength-reduction method
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参考文献10

  • 1Yu C, Schafer B W. Local buckling tests on cold-formed steel beams [J]. Journal of Structural Engineering, 2003, 129(12): 1596- 1606.
  • 2Yu C, Schafer B W. Distortional buckling tests on cold-formed steel beams [J]. Journal of Structural Engineering, 2006, 132(4): 515-528.
  • 3张耀春,王海明.冷弯薄壁型钢C形截面构件受弯承载力试验研究[J].建筑结构学报,2009,30(3):53-61. 被引量:19
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二级参考文献15

  • 1周天华,周绪红,何保康,刘永健,卢林枫,王彦敏.G550级高强薄板钢材的材性及应用[J].建筑科学与工程学报,2005,22(2):43-46. 被引量:23
  • 2周天华,何保康,周绪红,刘永健,王彦敏.高强冷弯薄壁型钢轴压短柱受力性能试验研究[J].建筑科学与工程学报,2005,22(3):36-44. 被引量:41
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  • 7Yu C , Schafer B W. Simulation of cold-formed steel beams in local and distortional buckling with applications to the direct strength method [ J ]. Journal of Construction Steel Research, 2007, 63 ( 5 ) : 581- 590.
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  • 9王海明 张耀春.复杂卷边冷弯型钢受弯构件屈曲性能研究[J].工业建筑,2007,:58-62.
  • 10王海明,张耀春.复杂卷边冷弯型钢受弯构件屈曲性能研究[C]..2007年全国轻型钢结构技术研讨会论文集.,2007.58-62.

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