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原文传递 Ultimate Tilt-Bearing Capacity of Bolted Connections in Cold-Reduced Steel Sheets

题名：	Ultimate Tilt-Bearing Capacity of Bolted Connections in Cold-Reduced Steel Sheets
正文语种：	英文
作者：	Lip H. Teh, M.ASCE;Mehmet E. Uz
作者单位：	Univ, of Wollongong;Adnan Menderes Univ
关键词：	Bolted connections; Bearing strength; Bolt punching; Cold-formed steel; Conn ection capacity; Connection curling; Single-shear bolted connection; Tilt bearing; Metal and composite structures.
摘要：	This paper examines the accuracy of design equations specified in the North American, European, and Australasian codes for cold-formed steel structures in determining the ultimate tilt-bearing capacity of single-shear bolted connections without washers in flat steel sheets. It points out that all the code equations do not properly distinguish the tilt-bearing failure mode from the conventional bearing failure mode. While the latter takes place downstream of the bolt, the former takes place upstream. Unlike the conventional bearing capacity, the tilt-bearing capacity is affected by the width of the connected sheet and does not vary linearly with either the sheet thickness or the bolt diameter. Furthermore, it is not affected by material ductility. Based on the test results of 156 specimens composed of G2 and G450 sheet steels having various dimensional configurations, this paper proposes a design equation that is dimensionally consistent and that is considerably more accurate than all the code equations. The proposed equation was also verified against single-shear single-row bolted connections tested by in dependent researchers which failed in the tilt-beari ng mode. The verified thicknesses ranged from 0.92 to 3.0 mm, and the bolt diameters ranged from 6.4 to 16 mm. An additional finding is that the tilt-bearing capacity is not significantly affected by the orientation of the bolt head or nut. A resistance factor of 0.75 is recommended for use with the proposed equation for determining the tilt-bearing capacity of single shear single-row bolted connections in cold-reduced steel sheets. DOI: 10.1061/(ASCE)ST.1943-54IX .0001702. © 2016 American Society of Civil Engineers.
出版日期：	2017.04
出版年：	2017
期刊名称：	Journal of Structural Engineering
卷：	Vol.143
期：	NO.04
页码：	04016206