光伏支架C型钢檩条-斜梁节点受力性能试验研究  

Experimental Study on Mechanical Behavior of C-Shaped Steel Purlin to Inclined Beam Joints in Photovoltaic Support Systems

作　　者：田志强 孟令峰 邵戊辰 高鹏 TIAN Zhiqiang;MENG Lingfeng;SHAO Wuchen;GAO Peng(Stategrid Electric Power Comprehensive Energy Inner Mongolia Co.,Ltd.,Ordos Inner Mongolia 017000,China)

机构地区：[1]国电电力综合能源内蒙古有限公司,内蒙古鄂尔多斯017000

出　　处：《工程质量》2024年第S02期170-176,共7页Construction Quality

摘　　要：为了揭示光伏支架檩条-斜梁节点的传力机理,对檩条-斜梁节点分别进行了风吸和风压状态下的静力加载试验,研究了此类节点的受力机理、破坏形态、承载性能和应变分布,考察了檩条壁厚对节点受力性能的影响。研究表明:在风压荷载作用下,檩条-斜梁节点的破坏都始于斜梁在其与檩托相连处的局部屈曲,从而带动檩托转动,并最终导致檩条因扭转变形过大而丧失承载力;风吸荷载作用下,节点的破坏是因为斜梁螺栓孔处变形严重,在撬力的作用下斜梁与檩托连接处的螺栓孔局部屈曲破坏。在斜梁螺栓连接处设置矩形垫板能有效提升孔壁的抗拉能力,承载力得以提高,是节点补强的有效措施。To investigate the load transfer mechanism of purlin-to-inclined beam joints in photovoltaic support systems,static loading tests were performed under both uplift and downward wind loading conditions.The study examined the mechanical behavior,failure patterns,load-bearing capacity,and strain distribution characteristics of these joints.Additionally,the effect of purlin thickness on the structural performance of the joints was evaluated.The research results showed that:under wind pressure loading,the failure of purlininclined beam joints initially occurred due to local buckling of the inclined beam at its connection with the purlin bracket,which led to the rotation of the purlin bracket and ultimately resulted in the loss of loadbearing capacity due to excessive torsional deformation of the purlin.Under wind suction loading,joints failure occurred due to severe deformation at the bolt holes of the inclined beam,where local buckling failure occurred at the bolt holes connecting the inclined beam and purlin bracket under prying action.The installation of rectangular washers at the bolt connections of the inclined beam effectively enhanced the tensile resistance of the hole walls,thereby improving the load-bearing capacity,which proved to be an effective reinforcement measure for the joints.

关 键 词：光伏支架 冷弯薄壁型钢 节点连接 静力试验 

分 类 号：TU391[建筑科学—结构工程]