光伏支架结构优化设计研究

Research on optimized design of structure of photovoltaic supporting bracket

以某光伏发电项目的常规支架结构方案为基础,提出了2种优化的结构方案.通过对3种支架结构方案进行内力计算,并研究斜梁、檩条、其他主要受力构件的最不利内力及应力,最终得到方案3为最合理的支架结构.同时,对斜梁及檩条的主要设计思路提出了建议:斜梁不宜采用角钢,宜采用截面特性合理、重量较轻的冷弯薄壁型钢;檩条宜按《冷弯薄壁型钢结构技术规范》(GB 50018-2002)设计,即考虑类似连续梁的有利作用,且设计时宜在1/3跨处进行连接.

Based on the common structure of supporting bracket in a photovoltaic project,this article puts forward two optimized structural schemes.By calculating the internal forces of the 3 structural schemes,and by researching the most unfavorable internal force and stress of the oblique beam,purlin,other main forced components,this article comes to a conclusion that the scheme 3 is the most reasonable structure of supporting bracket.Moreover,this article presents a suggestion of the major design ideas of the oblique beam and the purlin:angle steel should not be used for the oblique beam,and the lighter cold-formed thin-wall steel whose characteristics of the cross-section is reasonable should be used;the purlin should be designed according to Technical code of cold-formed thin-wall steel structures(GB 50018-2002);that is to say,considering the beneficial effect similar to the continuous beam,and the connecting should be located at the 1/3 span during design.