第38卷第6期 2016年12月
土木建筑与环境工程
Journal of Civil,Architectural &.Environmental Engineering
doi:10. 11835/j.issn. 1674-4764.2016. 06.012
Vol. 38 No. 6 Dec.2016
回口
偏心受压冷弯薄壁槽钢的卷边角度优化设
吴梦景1，黄棚浩1.3，张旭"，朱珏1，赵银海
(1.宁波大学机械工程与力学学院浙江宁波315211；2.浙江省二建钢结构
有限公司浙江宁波315207；3.上海交通大学船舶海洋与建筑工程学院，上海200240）
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°。
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
中图分类号：TU391
文献标志码：A：
文章编号：1674-4764(2016)06-0091-06
Optimization on angle of lip of cold-formed thin-walled
channel under eccentric compression
Wu Mengjing',Huang Xuhaol.3,Zhang Xu',Zhu Jue',Zhao Yinhai
(1. Faculty of Mechanical Engineering &.Mechanics, Ningbo University, Ningbo 315211, Zhejiang, P. R. China:
2. Zhejiang Er Jian Steel Structure Co. , Ltd. , Ningbo 315207, Zhejiang, P.R. China;
3. School of Naval Architecture, Ocean &. Civil Engineering, Shanghai Jiaotong University,Shanghai 200240, P. R. China) 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 alsc can obtain accurate optimal angles. The distortional critical stresses of cold-formed lipped channels with
收稿日期：2016-03-09
基金项目：国家自然科学基金（11572162)；浙江省自然科学基金（LY13A020007）
作者简介：吴梦景（1996-），女，主要从事冷弯薄壁钢构件的稳定性研究，（E-mail)mengjing_wu@163.com。
朱珏（通信作者）女，副教授，博士，（E-mail)zhujue@nbu.edu.cn。
Received:2016-03-09
Foundation item: National Natural Science Foundation of China (No. 11572162); the Natural Science Foundation of
Zhejiang Province （No.LY13A020007)
Author brief: Wu Mengjing(1996) , main major interest : the stability of cold-formed thin-walled steel member, (E-mail)
engjing_wu@163.com.
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