冷弯薄壁Z型钢构件卷边角度优化设计
PDF下载 (9676)叶文华,赵伟欣,李发超,朱 珏 *.冷弯薄壁Z型钢构件卷边角度优化设计[J].宁波大学学报(理工版),2018,31(4):65-69.DOI:
YE Wen-hua,ZHAO Wei-xin,LI Fa-chao,ZHU Jue *.Optimization on lip angle of cold-formed thin-walled Z-section[J].Journal of Ningbo University(Natural Science & Engineering Edition),2018,31(4):65-69.DOI:
| Title: | Optimization on lip angle of cold-formed thin-walled Z-section |
| 作者: | 叶文华, 赵伟欣, 李发超, 朱 珏 * |
| Author(s): | YE Wen-hua, ZHAO Wei-xin, LI Fa-chao, ZHU Jue * |
| 关键词: | 卷边Z型; 卷边角度; 直接强度法; 遗传算法; 畸变屈曲承载力 |
| Keywords: | lipped Z-section; lip angle; direct strength method; genetic algorithm; distortional buckling bearing capacity |
| 分类号: | TU392.1 |
| 文献标识码: | A |
| 摘要: | 为提高冷弯薄壁Z型钢构件的承载能力, 对其卷边角度进行优化设计. 以冷弯薄壁卷边Z型钢构件的卷边角度作为参数, 其他截面尺寸不变, 在冷弯卷边Z型钢柱轴心受压与钢梁受弯情况下, 基于直接强度法, 利用遗传算法寻找构件畸变屈曲承载力达到最大时的最佳卷边角度值. 该方法不但能节省运算时间、避免出现盲目性, 且可以找到最佳卷边角度的精确值. 最后从承载力的变化趋势, 同时考虑施工中存在的加工误差, 得出具有不同高度腹板的试样所对应的最佳卷边角度值. 在实际工程中建议卷边的设计角度选为100°. |
| Abstract: | In order to improve the bearing capacity of the cold-formed thin-walled Z steel structure, the angle of its lipping is optimized and analyzed. Taking the lip angle of cold-formed steel Z-section as an optimized parameter and keeping other dimensions as constants, the optimal lip angle under the maximal distortional buckling bearing capacity, viz., maximal axial loading on Z-column and maximal pure bending moment on Z-beam, is identified. Based on the direct strength method, the genetic algorithm is employed to search for the optimal angle. This method can not only save operation time and avoid blindness, but also find the accurate value of the optimal lipped angle. Finally, considering the changing trend of the bearing capacities and the processing error in construction, the optimal angle of the corresponding sample with different web height is taken out. In order to provide reference for the engineers in the project, it is suggested that the design angle of the lip is 100 degrees. |
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| 备注/Memo: | 收稿日期: 2017－12－04. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/基金项目: 国家自然科学基金（11572162）; 浙江省自然科学基金（LY13A020007）.第一作者: 叶文华（1983－）, 男, 福建龙岩人, 在读硕士研究生, 主要研究方向: 常用冷弯钢构件的截面尺寸优化. E-mail: wenhua_yee@163.com*通信作者: 朱珏（1979－）, 女, 浙江金华人, 教授, 主要研究方向: 冷弯钢结构稳定性分析. E-mail: zhujue@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
