| 双轴对称楔形工字钢梁的弹性弯扭屈曲 |
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| 引用本文： | 周佳,童根树. 双轴对称楔形工字钢梁的弹性弯扭屈曲[J]. 建筑钢结构进展, 2008, 10(5) |
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| 作者姓名： | 周佳 童根树 |
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| 作者单位： | 浙江大学,土木工程系,杭州,310027;中国建筑西南设计研究院有限公司,四川,成都,610081;浙江大学,土木工程系,杭州,310027 |
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| 摘 要： | 本文利用基于板壳屈曲理论的有限元方法对楔形薄壁构件的弯扭屈曲进行了分析，对两种基于薄壁杆件理论的楔形工字钢梁弯扭屈曲分析方法进行了对比。基于较精确的楔形薄壁构件屈曲理论，对承受线性变化端弯矩作用的楔形梁的弯扭屈曲进行了大量分析，并提出了新的楔形工字钢梁临界弯矩计算公式。该公式形式与等截面梁的相同，便于工程应用。
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| 关 键 词： | 楔形工字钢梁 弯扭屈曲 临界弯矩 |
Elastic Flexural-Torsional Buckling of Doubly Symmetric Web-Tapered I-Beams |
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| ZHOU Jia,TONG Gen-shu. Elastic Flexural-Torsional Buckling of Doubly Symmetric Web-Tapered I-Beams[J]. Progress in Steel Building Structures, 2008, 10(5) |
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| Authors: | ZHOU Jia TONG Gen-shu |
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| Abstract: | A comparative study on two flexural-torsional buckling theories for tapered members is carried out. Finite element analysis based on the shell buckling theory, which is believed to be more accurate than any member theory because of less assumptions used, is also carried out to provide a common basis for comparison. Based on the more accurate member theory, linearly tapered members under end moments are analyzed, and a new formula having the similar expression to that for prismatic members is proposed, the accuracy of which is verified with the FE results. |
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| Keywords: | tapered I-beams flexural-torsional buckling critical load |
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