冷弯薄壁型钢结构体系中自攻螺钉连接的抗剪性能试验研究

发布时间：2018-03-04 21:25

本文选题：冷弯薄壁型钢　切入点：螺钉连接　出处：《西安建筑科技大学学报(自然科学版)》2014年06期 　论文类型：期刊论文

【摘要】：为了研究钢板与钢板、钢板与定向刨花板(OSB板)以及钢板与硅酸钙板(CSB)之间(自钻)自攻螺钉连接的抗剪性能,对32个螺钉连接试件进行了试验研究,研究了螺钉连接试件的受力过程和受力模式,分析了钢板厚度、板材受拉纤维方向的差异、加载速度以及螺钉至板材边缘距离等参数对试件受剪承载力的影响.试验结果表明:钢板与钢板连接的破坏形态为螺钉孔处钢板局部承压和螺钉头被剪断;钢板与OSB板连接最终发生自攻螺钉的过度倾斜和OSB板端部的劈裂分层;钢板与CSB板连接的破坏模式为自攻螺钉处CSB板被净截面拉断.随着钢板厚度以及螺钉至板材边缘距离的增加,自攻螺钉连接的受剪承载力有所提高;随着加载速度的增加,钢板与钢板连接以及钢板与CSB板连接试件的受剪承载力略有增加,钢板与OSB板连接试件的受剪承载能力出现一定降低.OSB板与CSB板的方向性导致纵向纤维受拉试件的受剪承载力明显高于横向纤维受拉试件.
[Abstract]:In order to study the shear resistance of steel plate and plate, steel plate and oriented particleboard (OSB) and steel plate and calcium silicate board (CSB), 32 screw joint specimens were tested. In this paper, the stress process and stress mode of the screw joint specimen are studied, and the difference of the thickness of steel plate and the direction of tensile fiber of plate is analyzed. The effect of loading speed and the distance between screw and plate edge on the shear bearing capacity of the specimen is studied. The results show that the failure pattern of the connection between steel plate and plate is local compression of steel plate and shearing of screw head at the screw hole. Finally, excessive tilt of tapping screws and split delamination at the end of OSB plate occurred in connection between steel plate and OSB plate. The failure mode of the connection between the steel plate and the CSB plate is that the CSB plate is pulled by the net cross section at the self-tapping screw. With the increase of the thickness of the plate and the distance from the screw to the edge of the plate, the shear capacity of the self-tapping screw joint increases, and the shear capacity of the self-tapping screw joint increases with the increase of loading speed. The shear capacity of steel plate to steel plate connection and steel plate to CSB plate joint is slightly increased. The shear bearing capacity of steel plate and OSB plate is decreased. The directionality of OSB plate and CSB plate leads to the shear capacity of longitudinal fiber tensile specimen is obviously higher than that of transverse fiber tensile specimen.
【作者单位】：西安建筑科技大学土木工程学院;陕西省建筑设计研究院有限责任公司;
【基金】：陕西省“13115”科技创新工程重大科技专项项目(2009ZDKG-66) 住房和城乡建设部科学技术项目(2012-K2-17) 国家自然科学基金青年项目(51408461)
【分类号】：TU392.1;TU317.1

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