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原文传递 Cyclic Experiments on Sidelap and Structural Connectors in Steel Deck Diaphragms

题名：	Cyclic Experiments on Sidelap and Structural Connectors in Steel Deck Diaphragms
正文语种：	eng
作者：	Torabian, S.;Schafer, B. W.
作者单位：	Simpson Gumpertz & Heger 1625 Eye St Suite 900 Washington DC 20006 USA\|Johns Hopkins Univ Dept Civil & Syst Engn 3400 Charles St Baltimore MD 21218 USA\|NBM Technol Inc Blacksburg VA 24060 USA;Simpson Gumpertz & Heger 1625 Eye St Suite 900 Washington DC 20006 USA\|NBM Technol Inc Blacksburg VA 24060 USA\|Johns Hopkins Univ Dept Civil & Syst Engn Civil Engn 3400 Charles St Baltimore MD 21218 USA
摘要：	This work studied the cyclic shear performance of connectors used for sidelap and structural connectors in bare steel deck roof diaphragms. Typical bare steel deck roof diaphragms include thousands of such connections, and knowledge of the connection shear performance is important for understanding and predicting diaphragm performance under seismic loads. The experimental program included four types of sidelap connectors: screw nestable, top arc seam weld, button punch, and the proprietary PunchLok II crimp. The testing included three types of structural connectors: power-actuated fasteners, arc spot welds, and arc scam welds. A total of 64 sidelap and 60 structural connector tests were performed under a cyclic loading protocol, to evaluate behavior at small deformations as well as under large excursions, providing the shear response up to and through the peak response, including postpeak response until material separation and failure. The connection test results were used to establish experimental multilinear backbone curves. From these backbone curves, average connection shear stiffness, strength, and ductility can be estimated and compared for all studied configurations. The connection response for the mechanical connections and welded connections exhibited significantly different behavior, particularly in terms of postpeak ductility and residual force. The connector backbone response is appropriate for use as nonlinear shear springs to model the response of the connections in high-fidelity models of bare steel deck roof diaphragms. (C) 2021 American Society of Civil Engineers.
出版年：	2021
期刊名称：	Journal of structural engineering
卷：	147
期：	4