| 偏心受压冷弯薄壁槽钢的卷边角度优化设计 |
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| 引用本文： | 吴梦景,黄栩浩,张旭,朱珏,赵银海.偏心受压冷弯薄壁槽钢的卷边角度优化设计[J].重庆建筑大学学报,2016,38(6):91-96. |
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| 作者姓名： | 吴梦景 黄栩浩 张旭 朱珏 赵银海 |
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| 作者单位： | 宁波大学 机械工程与力学学院 浙江 宁波 315211,宁波大学 机械工程与力学学院 浙江 宁波 315211;上海交通大学 船舶海洋与建筑工程学院, 上海 200240,宁波大学 机械工程与力学学院 浙江 宁波 315211,宁波大学 机械工程与力学学院 浙江 宁波 315211,浙江省二建钢结构 有限公司 浙江 宁波 315207 |
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| 基金项目： | 国家自然科学基金（11572162）；浙江省自然科学基金（LY13A020007） |
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| 摘 要： | 为了使得钢结构的性能与用钢量比达到最优，前人对槽型钢的截面尺寸优化进行了较为充分的研究。但是，涉及卷边角度的优化特别是偏心受压工况下的优化分析却很缺乏。以Yao-Teng偏心受压计算公式，结合遗传算法，以冷弯卷边槽钢柱偏心受压为例，将槽钢卷边角度与偏心距作为设计变量，寻找在不同偏心距受压情况下，达到最大畸变屈曲临界应力的卷边角度。基于有限条分析程序，对两端简支与两端固支情况下不同截面尺寸构件的畸变屈曲临界应力进行了计算分析，最终得出不同偏心距受压下统一的最优卷边角度。为了方便工程设计人员设计时参考，建议卷边角度统一取为100°。
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| 关 键 词： | 偏心受压 斜卷边槽钢 有限条 遗传算法 最优卷边角度 |
| 收稿时间： | 2016/3/9 0:00:00 |
Optimization on angle of lip of cold-formed thin-walled channel under eccentric compression |
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| Wu Mengjing,Huang Xuhao,Zhang Xu,Zhu Jue and Zhao Yinhai.Optimization on angle of lip of cold-formed thin-walled channel under eccentric compression[J].Journal of Chongqing Jianzhu University,2016,38(6):91-96. |
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| Authors: | Wu Mengjing Huang Xuhao Zhang Xu Zhu Jue and Zhao Yinhai |
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| Affiliation: | Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, Zhejiang, P. R. China,Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, Zhejiang, P. R. China;School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, P. R. China,Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, Zhejiang, P. R. China,Faculty of Mechanical Engineering & Mechanics, Ningbo University, Ningbo 315211, Zhejiang, P. R. China and Zhejiang Er Jian Steel Structure Co., Ltd., Ningbo 315207, Zhejiang, P. R. China |
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| Abstract: | The optimization of the sectional dimensions is studied to make the ratio between performance and steel amount of steel sections become optimal. However, the optimization analysis of lip angle involving the eccentric compression is lack. A technique with the genetic algorithm and formulae for predicting the distortional critical stresses of cold-formed lipped channels subjected to eccentric compression is developed to optimize the angles of lips of channels. The cold-formed lipped channel columns under eccentric compressing have been taken as examples. The genetic algorithm regards the angle of lip and eccentric distance as design parameters. This method not only can decrease workload and aimless calculation but also can obtain accurate optimal angles. The distortional critical stresses of cold-formed lipped channels with different dimensions under simply and clamped supports are obtained, based on the finite strip analyses. The optimal angles of cold-formed channel steel members with different eccentric distances are presented. For designer''s convenience of design and application, the degree of 100 is suggested. |
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| Keywords: | inclined lipped cold-formed channel eccentric compression finite strip optimal angle of lip |
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