Authors: Abi-Saad, Georges; Bauer, Dominique

Source: Canadian Journal of Civil Engineering, Volume 33, Number 4, April 2006 , pp. 384-394(11)

Publisher: NRC Research Press

Abstract:

The authors propose an analytical approach for calculating the reduction in strength of steel tension members due to shear lag effects. The approach is based on an assumed distribution of forces along inclined lines in the member ends, somewhat similar to the Whitmore concept used with gusset plates for bracing members. The method is demonstrated for a basic weld in shear at elastic, plastic, and ultimate stress levels. The method is then compared with the recommendations contained in standard CAN/CSA-S16-01 for elements connected by a single longitudinal weld and for elements connected by longitudinal welds along two parallel edges. The predicted strength of tension members with welded connections is compared with results from several laboratory tests. The proposed method could be used for calculating the reduction in strength due to shear lag effects of tension members with different sections.Key words: steel structures, trusses, tension members, welded connections, shear lag, Whitmore.

Les auteurs proposent une approche analytique pour calculer la résistance réduite des membrures métalliques en tension en raison des effets du décalage en cisaillement en se basant sur une distribution hypothétique des forces le long de lignes inclinées dans les extrémités des membrures; cela est quelque peu similaire au concept de Whitmore utilisé avec les plaques-goussets pour les membrures de renforcement. La méthode est établie pour une soudure de base en cisaillement aux niveaux élastique, plastique et de rupture. La méthode est comparée aux recommandations de la norme CSA S16-01 pour les membrures raccordées par une simple soudure longitudinale et les membrures raccordées par des soudures longitudinales le long de deux bords parallèles. La résistance prévue des membrures en tension munies d'assemblages soudés est comparée aux résultats de plusieurs essais en laboratoire. La méthode proposée pourrait être utilisée pour calculer la résistance réduite par les effets de décalage en cisaillement dans les membrures en tension de différentes sections.Mots clés : structures en acier, fermes, membrures en tension, assemblages soudés, retard de cisaillement, Whitmore.[Traduit par la Rédaction]

Document Type: Research article

Publication date: 2006-04-01

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• Published since 1974, this monthly publication is the official journal of the Canadian Society for Civil Engineering. It contains articles on environmental engineering, hydrotechnical engineering, structure engineering, construction engineering, engineering mechanics, and engineering materials, and a history of civil engineering. Contributors include recognized researchers and practitioners in industry, government, and academe. New developments in engineering design and construction are also featured.
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