Screwed Connection Tests of Thin G550 and G300 Sheet Steels
Publication: Journal of Structural Engineering
Volume 125, Issue 2
Abstract
Cold-formed structural members are fabricated from sheet steels that must meet the various material requirements prescribed in applicable national design standards. These requirements ensure that (1) stress concentrations can be redistributed; and (2) members and connections can undergo a minimum amount of displacement without a loss in structural performance. The 1996 Standards Australia/Standards New Zealand (AS/NZS) 4600, and Canadian Standards Association (CSA)-S136 and American Iron and Steel Institute (AISI) cold-formed steel design standards allow for the use of thin (t < 0.9 mm in AS/NZS 4600), high-strength (fy = 550 MPa) sheet steels if the yield stress and ultimate strength are reduced to 75% of their minimum specified values. This paper provides a summary of results detailing the behavior of thin G550 and G300 sheet steel, single overlap, screwed connections. The accuracy of the AS/NZS 4600, CSA-S136, and AISI design standards diminishes when they are used to estimate the bearing resistance of screwed connections that are loaded in shear. Hence, it is necessary to reduce the bearing coefficient that is used for screwed connections to limit the unconservative nature of these design standards. A proposed design formulation that can be used to more accurately predict the resistance of screwed connections that fail in the combined bearing/tilting mode is presented.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 125 • Issue 2 • February 1999
Pages: 128 - 136
History
Received: Feb 5, 1998
Published online: Feb 1, 1999
Published in print: Feb 1999
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