【作者】 张旭； 吴梦景； 黄栩浩； 赵银海； 朱珏；

【Author】 Zhang Xu;Wu Mengjing;Huang Xuhao;Zhao Yinhai;Zhu Jue;Faculty of Mechanical Engineering &Mechanics,Ningbo University;Naval Architecture,Ocean & Civil Engineering,Shanghai Jiaotong University;Zhe Jiang Er Jian Steel Structure Co. Ltd;

【机构】 宁波大学机械工程与力学学院； 上海交通大学船舶海洋与建筑工程学院； 浙江省二建钢结构有限公司；

【摘要】 畸变屈曲是控制冷弯型钢稳定设计的重要屈曲模式之一。基于Hancock轴心受压计算式,结合遗传算法,以冷弯卷边槽钢柱轴心受压为例,将卷边槽钢腹板高度、翼缘宽度、卷边长度、以及截面厚度作为设计变量,寻找在截面面积一定的情况下,构件极限承载力最大的截面尺寸组合。并基于有限条屈曲分析程序,对优化后截面尺寸与原截面尺寸进行计算对比分析。通过分析证明该方法可在不改变截面形状与增加用钢量的情况下,达到提高构件的极限承载力的目的。更多还原

【Abstract】 Distortional buckling is an important buckling mode governing the stability design of cold-formed steel channels. This paper proposes a method combining the genetic algorithm and formula for predicting the critical stress of distortional buckling of cold-formed lipped channels subjected to axial compression developed by Hancock to optimize the section size to achieve the optimal bearing capacity based on a certain cross section area. Taking coldformed lipped channel under axial compression for example,it holds the web height of lipped channel steel,width of the flange,length of lip and thickness of the section as design variables in calculation. Comparison and analyzation on the calculation results of the optimized cross section with the original one were proceeded by the CUFSM program. The results demonstrate that the process can enhance the member’s ultimate bearing capacity without changing the cross section area and amount of steel.更多还原