Branch Plate-to-Circular Hollow Structural Section Connections. II: X-Type Parametric Numerical Study and Design
Publication: Journal of Structural Engineering
Volume 138, Issue 8
Abstract
This paper presents a numerical finite-element parametric study on the behavior of transverse or longitudinal X-type plate-to-circular hollow section connections loaded under branch plate tension or compression, to evaluate the suitability of present international (CIDECT) design recommendations, the effect of boundary conditions and chord length, and the influence of applied chord normal stress. A total of 449 connections with wide-ranging values of geometric properties and chord normal stress levels were modeled and analyzed using commercially available software. An analysis of the effect of chord length determined that, to exclude the influence of chord end boundary conditions, an effective chord length of at least 10 times the chord diameter should be used for experimental and numerical studies. Further, the present CIDECT chord stress functions () provide an acceptable lower bound for all connections examined. Evaluation of present CIDECT partial design strength functions () indicated general conservatism, lack of plate thickness incorporation, and underutilization of tension-only connections. Partial design strength functions, determined through regression analysis, are hence proposed with lower-bound reduction (resistance) factors.
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Acknowledgments
Financial support was provided by CIDECT (Comité International pour le Développement et l’Etude de la Construction Tubulaire) Programme 5BS, the Steel Structures Education Foundation (SSEF), the Natural Sciences and Engineering Research Council of Canada (NSERC), and Ontario Graduate Scholarships in Science and Technology (OGSST).
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Published In
Journal of Structural Engineering
Volume 138 • Issue 8 • August 2012
Pages: 1007 - 1018
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Jan 4, 2011
Accepted: Nov 30, 2011
Published online: Jul 16, 2012
Published in print: Aug 1, 2012
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