| 变截面开口薄壁钢箱稳定性分析 |
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| 引用本文： | 刘芳平,周建庭.变截面开口薄壁钢箱稳定性分析[J].重庆交通大学学报(自然科学版),2012,31(6):1105-1108,1255. |
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| 作者姓名： | 刘芳平 周建庭 |
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| 作者单位： | 1. 重庆交通大学土木建筑学院,重庆400074;重庆三峡学院土木工程学院,重庆404000
2. 重庆交通大学土木建筑学院,重庆,400074 |
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| 基金项目： | 重庆市重大科技攻关基金项目，重庆市杰出青年基金项目 |
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| 摘 要： | 从薄板基本理论出发,利用单块板的平衡状态,将基本方程建立在变形后的结构上,用假想荷载法推导出了薄壁构件弯扭平衡微分方程;以变截面开口薄壁钢箱为研究对象,用有限元软件ANSYS对大量不同尺寸的结构进行了屈曲分析。研究发现:受竖向均布荷载作用下变截面悬臂开口薄壁钢箱有3种基本屈曲形态,即板件的局部屈曲、截面的畸变屈曲和构件的整体屈曲;随着结构尺寸的变化,一阶屈曲形式也在发生变化,并且呈一定的规律。
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| 关 键 词： | 薄壁钢箱 假想荷载法 稳定性 屈曲 |
Stability Analysis of Open Thin-Walled Steel Box with Variable Cross-Section |
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| Liu Fangping
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Zhou Jianting.Stability Analysis of Open Thin-Walled Steel Box with Variable Cross-Section[J].Journal of Chongqing Jiaotong University,2012,31(6):1105-1108,1255. |
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| Authors: | Liu Fangping Zhou Jianting |
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| Institution: | 1 (1.School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China; 2.School of Civil Engineering,Chongqing Three Gorges University,Chongqing 404000,China) |
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| Abstract: | The balance differential equations of bending and torsion of the thin-walled component were derived from notional load technique method,on the base of the deformed structure and the equilibrium of a single plate.On the other hand,a large number of different bucklings with open thin-walled steel box with variable cross-section are analyzed by using finite element program ANSYS.It is concluded that,by vertical uniform loads,the cantilever thin-walled steel box which has open and variable cross-section has three basic forms of buckling,that is,the local buckling of plate,distortion buckling of cross-section and overall buckling of the component.With the change of structural size,first-order buckling form also changes in certain rules. |
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| Keywords: | thin-walled steel box notional load technique method stability buckling |
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