| RL型截面冷弯薄壁型钢的畸变屈曲荷载算式 |
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| 引用本文： | 姚谏,卢哲刚.RL型截面冷弯薄壁型钢的畸变屈曲荷载算式[J].土木与环境工程学报,2014,36(2):6-13. |
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| 作者姓名： | 姚谏 卢哲刚 |
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| 作者单位： | [1]浙江树人大学城建学院,杭州310015 [2]浙江大学结构工程研究所,杭州310058 [3]浙江绿城建筑设计有限公司,杭州310007 |
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| 基金项目： | 浙江省科技计划项目（2011C31006）;教育部博士学科点专项科研基金（J20120118） |
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| 摘 要： | 为了对RL型截面冷弯薄壁型钢的畸变屈曲作进一步研究,以既有研究成果为基础,根据广义梁理论推导了两端简支和固支边界条件下RL型截面冷弯薄壁型钢的畸变屈曲荷载计算式.通过求解矩阵的广义特征值,利用推导的算式计算RL型截面型钢构件在轴压、绕弱轴和强轴弯曲下的畸变屈曲荷载和屈曲半波长,并与有限条软件CUFSM分析结果和既有理论公式的解相比,结果表明所得算式具有较高的精度.公式推导过程和结论可以为工程设计和进一步研究中计算畸变屈曲荷载提供参考.
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| 关 键 词： | 冷弯薄壁型钢 RL型截面 广义梁理论 荷载 |
| 收稿时间： | 2013/2/21 0:00:00 |
Distortional Buckling Formulae of Cold-Formed Thin-Walled Rack Members Upright with Rear Flange and Additional Lip Stiffeners |
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| Yao Jian and Lu Zhegang.Distortional Buckling Formulae of Cold-Formed Thin-Walled Rack Members Upright with Rear Flange and Additional Lip Stiffeners[J].Journal of Civil and Environmental Engineering,2014,36(2):6-13. |
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| Authors: | Yao Jian and Lu Zhegang |
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| Affiliation: | 1. College of Urban Construction, Zhejiang Shuren University, Hangzhou 310015, P. R. China 2. Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, P. R. China; 3. Zhejiang Greentown Architectural Design Co, Ltd, Hangzhou 310007, P. R. China) |
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| Abstract: | According to the generalised beam theory based on the exist studies, the aim of this paper is to derive the distortional buckling formulae of pined or fixed cold-formed thin-walled rack members upright with rear flanges and additional lip stiffeners. The formulae is adopted to calculate the distortional buckling load and the buckling half-wave length of the member subiected to axial compression or minor and major axis bending. Meanwhile, the results are compared to those of finite strip program CUFSM and other analytical formulae. The derived formulae is proved to be accurate enough. As a result, it may be directly used in practical design as well as further study. |
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| Keywords: | cold-formed thin-walled section rack section upright with rear flange and additional lip stiffener generalised beam theory loads |
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