冷弯薄壁型钢钢管端柱蒙皮钢板剪力墙抗剪性能试验及理论研究  

EXPERIMENTAL AND THEORETICAL STUDY ON SHEAR PERFORMANCE OF COLD-FORMED THIN-WALLED STEEL TUBE END STUDS SHEAR WALL COVERED STEEL PLATE

作　　者：管宇[1] 周绪红[1,2] 石宇[2] 姚欣梅 GUAN Yu;ZHOU Xu-hong;SHI Yu;YAO Xin-mei(College of Civil Engineering,Chang’an University,Xi’an 710061,China;Key Laboratory of New Technology for Construction of Cities in Mountain Area(Ministry of Education),Chongqing University,Chongqing 400045,China)

机构地区：[1]长安大学建筑工程学院,西安710061 [2]山地城镇建设与新技术教育部重点实验室,重庆大学,重庆400045

出　　处：《工程力学》2023年第12期28-40,共13页Engineering Mechanics

基　　金：国家自然科学基金项目(51908047);陕西省自然科学基础研究计划项目(2022JM-227,2022JQ-570);长安大学中央高校基本科研业务费专项资金项目(300102281205)。

摘　　要：为推动冷弯薄壁型钢结构体系由低层向多层发展,解决传统剪力墙抗剪承载力不足、端柱易发生屈曲和局部承压破坏的技术难题,提出了冷弯薄壁型钢钢管端柱蒙皮钢板剪力墙的新型墙体构造形式,以实现“强端柱、弱墙板”的设计原则。通过水平低周往复加载试验对剪力墙的抗剪性能进行研究,试验结果表明:钢管端柱蒙皮钢板剪力墙的破坏形式为钢板周边螺钉连接破坏导致蒙皮作用失效,钢管端柱未见压屈。减小剪力墙周边自攻螺钉的间距,使钢板拉力带得到充分发展,可提高剪力墙的抗剪承载力、抗侧刚度、延性以及耗能能力。对钢管—钢板自攻螺钉连接试件的抗剪性能进行试验研究,结果表明:螺钉连接试件的破坏特征为钢板的孔壁承压破坏,自攻螺钉群的抗剪承载力具有“群体折减效应”。基于剪力墙和自攻螺钉连接试件的抗剪试验结果,提出了钢管端柱蒙皮钢板剪力墙的抗剪承载力和抗侧刚度的计算方法。研究成果为多层冷弯薄壁型钢结构体系的理论研究和工程应用提供可靠依据。To promote the development of cold-formed thin-walled steel structures from low-rise system to multi-storey system,a new form of cold-formed thin-walled steel tube end studs shear wall covered steel plate was proposed.Technical problems such as insufficient shear capacity of traditional shear wall,easy buckling and local bearing failure of end studs were solved,so as to achieve the design principle of"strong end studs,weak wall sheathings".The shear performance of shear wall was studied by horizontal low-cycle cyclic loading test.The test results show that the failure mode of steel tube end studs shear wall covered steel plate is sheet diaphragm effect invalidation caused by screw connection failure around the steel plate.And there is no buckling occurring on the steel tube end studs.The shear bearing capacity,lateral stiffness,ductility and energy dissipation capacity of shear wall can be improved as well as the steel plate tension strip is fully developed by reducing the spacing of self-tapping screws around the shear wall.The shear performance of steel tube steel plate self-tapping screw connection specimens was studied.The results show that the failure characteristics of the screw connection specimens are pore wall bearing failure of steel plate.The shear capacity of self-tapping screw group connection have group reduction effect.Based on shear test results of shear walls and self-tapping screw connection specimens,the calculation methods of shear capacity and lateral stiffness of steel tube end studs shear wall covered steel plate were proposed.The research results provide reliable bases for theoretical research and engineering application of multi-storey cold-formed thin-walled steel structural system.

关 键 词：冷弯薄壁型钢 钢板剪力墙 抗剪性能 自攻螺钉连接 计算方法 

分 类 号：TU391[建筑科学—结构工程] TU317.1