冷弯薄壁型钢单颗自攻螺钉抗剪连接性能研究

为研究中国规范《冷弯薄壁型钢结构技术规范》（GB50018-2002）计算壁厚2mm以下钢板自攻螺钉连接抗剪承载力的适用性和钢板-非钢板单颗自攻螺钉连接抗剪承载力设计方法，对钢板-钢板、钢板-石膏板以及钢板一定向刨花板（OSB板）连接件共计34个试件进行了试验研究，分析了板材类型、螺钉端距等因素对连接件抗剪承载力的影响，并将中国规范、英国规范和北美AISIS100—12规范计算结果与试验结果进行对比分析，最后提出钢板-非钢板单颗自攻螺钉连接抗剪承栽力设计方法。研究结果表明：钢板-OSB板、钢板-石膏板连接件破坏模式为OSB板与石膏板发生承压破坏，且具有明显的方向性；随螺钉端距的增大，试件抗剪承栽力有所提高；中国规范GB50018-2002适用于壁厚2mm以下冷弯薄壁型钢板自攻螺钉连接抗剪承载力的设计计算，且偏于安全。

Research on Shear Behavior of Single Tapping Screw Connection in Cold-formed Thin-wall Steel Structures

In order to investigate the applicability of calculating the shear capacity of single tapping screw connection with sheet steel under 2 mm according to Chinese code Technical Codeof Cold-formed Thin-wall Steel Structure （GB 50018-2002） and the design method of single tapping screw connection between steel plate and non-steel plate, a total of 34 specimens weretested in three series, which were distinguished by the connection forms, such as steel plate-steel plate connection, steel plate-gypsum wallboard connection and steel plate-oriented strand board（OSB） connection. Authors analyzed the influence of sheet material and the screw end distance, etc. for the shear capacity of single tapping screw connection and compared the calculation resultswith the test results according to Chinese code,British code and North American AISI S100-12 standard. Finally,the design method of shear capacity of single tapping screw connection betweensteel plate and non-steel plate was proposed. The research results show that the failure modes of steel plate-OSB connection and steel plate-gypsum wallboard connection are bearing damage inplate-gypsum wallboard and OSB which are both anisotropic. With the screw end distance increasing,the shear capacity of specimens is improved. Chinese code GB 50018-2002 is suited tocalculate the shear capacity of single tapping screw connection in cold-formed thin-wall steel with sheet steel under 2 mm and the results are safe.