冷弯薄壁高强度合金钢光伏支架构件连接抗剪性能试验研究  

Experimental study on shear behavior of photovoltaic bracket members connection with the highstrength coldformed thinwalled steel

作　　者：马辉[1,2] 强佳琪 张国恒 刘方达 刘喜洋 MA Hui;QIANG Jiaqi;ZHANG Guoheng;LIU Fangda;LIU Xiyang(State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi'an University of Technology,Xi'an 710048,China;School of Civil Engineering and Architecture,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048 [2]西安理工大学土木建筑工程学院,陕西西安710048

出　　处：《自然灾害学报》2022年第5期47-54,共8页Journal of Natural Disasters

基　　金：国家自然科学基金项目(51408485);陕西省自然科学基础研究计划项目(2022JM-258)。

摘　　要：为研究冷弯薄壁高强度合金钢光伏支架构件连接的抗剪力学性能,文中对24个光伏支架连接试件进行了抗剪承载力试验,重点研究了构件腹板及翼缘分别采用螺栓连接的力学性能,观察了试件的破坏过程及破坏形态,获取了试件的荷载-位移曲线和极限承载力,结果表明:达到峰值荷载时,试件翼缘上的自攻螺钉首先被剪断,其次螺栓附近的冷弯薄壁钢板被压屈服,试件发生典型的承压破坏;与螺栓在翼缘上的试件相比,螺栓在腹板上的试件刚度大,但试件延性降低。基于现有规范中的相关计算公式,提出了冷弯薄壁高强度合金钢光伏支架构件连接的承载力修正计算公式,计算值与试验值吻合较好,研究结论可为冷弯薄壁高强度合金钢光伏支架的工程应用提供参考。In order to study the shear mechanical properties of photovoltaic bracket member connection with the high-strength cold-formed thin-walled steel,24 photovoltaic bracket connection specimens were tested for shear capacity.The mechanical properties of web and flange connected by bolts were mainly studied.The failure process and failure mode of the specimens were observed,and the load-displacement curve and ultimate bearing capacity of the specimens were obtained.The results show that when the peak load is reached,the self-drilling screw on the flange of the specimen is cut first,and then the cold-formed thin-walled steel plate near the bolt is compressed to yield,which leads to the typical bearing failure of the specimen.Compared with the specimen of the bolt on the flange,the stiffness of the specimen of the bolt on the web is larger,but the ductility is lower.Based on the relevant calculation formulas in the technical code,a modified calculation formula for calculating the bearing capacity of photovoltaic bracket member connection with the high-strength cold-formed thin-walled steel was proposed,and the calculation values were in good agreement with the test values.The research conclusion can provide reference for the engineering application of the photovoltaic bracket with the high-strength cold-formed thin-walled steel.

关 键 词：冷弯薄壁型钢 高强度合金钢 光伏支架 抗剪承载力 力学性能 

分 类 号：TU392[建筑科学—结构工程] TU317.1