LQ550钢材刚性光伏支架设计分析与试验验证  

An analysis and experimental verification of LQ550 steel rigid photovoltaic support

作　　者：吴艳姣 袁焕鑫[2] 谭美超 房铭坤 陈守祥 杜新喜[2] WU Yanjiao;YUAN Huanxin;TAN Meichao;FANG Mingkun;CHEN Shouxiang;DU Xinxi(Central Southern China Electric Power Design Institute Co.Xtd.,China Power Engineering Consulting Group,Wuhan 430071,China;School of Civil and Architectural Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]中国电力工程顾问集团中南电力设计院有限公司,湖北武汉430071 [2]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2022年第S02期7-11,共5页Engineering Journal of Wuhan University

摘　　要：考虑将LQ550级高强C型钢檩条应用于光伏支架结构中,从而发挥高强钢材的优势,降低支架结构造价。为了提高冷弯C型钢檩条的稳定承载力,通过加设C型钢撑杆的方式对檩条的侧向扭转进行约束。结合光伏发电工程案例,设计了带C型钢支撑的檩条体系方案,采用光伏支架智能设计软件验算檩条体系方案,且对檩条体系进行了有限元分析。对3组简支檩条试件进行六点受弯加载试验验证,得到了有、无撑杆约束的檩条试件荷载-位移曲线和承载力。研究结果表明,采用加C型钢撑杆的方式可以明显提升檩条的承载力和刚度,C型钢撑杆可视为有效侧向约束,檩条侧向计算长度系数可按现行规范GB50018中规定的取值进行计算。The LQ550 high-strength C-section purlins are considered to be introduced into the photovoltaic support structures,so as to exploit the advantages of high-strength steel and to reduce the structural cost.In order to improve the buckling capacity of cold-formed C-shaped steel purlins,the lateral-torsional restraints of purlins are applied by C-section steel bracings.Combined with a photovoltaic power generation project,the purlin system with C-section bracings is designed,which was further examined by using the intelligent design software of photovoltaic support and analyzed by means of the finite element modeling.Six-point bending tests are carried out on three groups of simply supported purlin specimens,and the load versus displacement curves and load-carrying capacities of the tested specimens with or without C-section bracings are obtained.lt was revealed that the load-carrying capacity and the initial stiffness of purlins could be significantly improved by the C-section bracings,and the C-section bracings are considered as effective lateral restraints,and the lateral calculation length coefficients of purlins can be taken by referring to the values specified in the design code GB 50018.

关 键 词：光伏支架 LQ550钢材 C型钢檩条 有限元分析 试验研究 

分 类 号：TU392.5[建筑科学—结构工程]