| 工字形等截面悬臂横梁弯扭失稳问题解析解研究 |
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| 引用本文： | 姚君芳,罗劲松.工字形等截面悬臂横梁弯扭失稳问题解析解研究[J].国外建材科技,2010,31(4):64-66. |
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| 作者姓名： | 姚君芳 罗劲松 |
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| 作者单位： | 1. 铁道第三勘察设计院集团有限公司,天津,300142
2. 中国土木工程集团有限公司,北京,100038 |
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| 摘 要： | 推导了工字形等截面(双轴对称等截面和单轴对称等截面)悬臂横梁的弯扭失稳问题的解析解,与有限元程序ANSYS得到的数据进行对比,验证了推导解析公式的有效性。研究结果表明:对于双轴对称工字形等截面悬臂横梁,解析公式与ANSYS数值分析结果吻合较好,对于单轴对称截面则相对误差较大,分析了产生误差的原因。
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| 关 键 词： | 双轴对称 单轴对称 稳定 弯扭失稳 临界荷载 |
Analytical Analysis of Flexural-torsional Instability Problem of I-shaped Constant-section Cantilever Horizontal Beam |
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| YAO Jun-fang,LUO Jin-song.Analytical Analysis of Flexural-torsional Instability Problem of I-shaped Constant-section Cantilever Horizontal Beam[J].Science and Technology of Overseas Building Materials,2010,31(4):64-66. |
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| Authors: | YAO Jun-fang LUO Jin-song |
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| Affiliation: | 1.The Third Railway Survey and Design Institute Group Corporation,Tianjin 300142,China;2.China Civil Engineering Construction Corporation,Beijing 100038,China) |
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| Abstract: | Through the analytical analysis of flexural-torsional instability problem of I-shaped constant-section（double symmetrical constant section and mono-symmetrical constant section） cantilever horizontal beam,the effectiveness of the formulas deduced by author is verified.The results show that,the formulas agree well with the ANSYS results for I-shaped double symmetrical constant section cantilever horizontal beam,but have big relative error for mono-symmetrical constant section.The error generation causes are analyzed. |
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| Keywords: | double symmetrical mono-symmetrical stability flexural-torsional buckling critical load |
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