Analysis of the Lateral Thrust in Bolted Steel Buckling-Restrained Braces. I: Experimental and Numerical Results
Publication: Journal of Structural Engineering
Volume 138, Issue 10
Abstract
This work presents an experimental and numerical analysis of the lateral forces exerted by the inner core of a buckling-restrained brace (BRB) when, after buckling in compression, it arrives into contact with the external restraining case, from which it is separated by a small empty gap. Experiments are carried out on reduced-scale specimens to measure the thrust acting on the containment struts. Refined, nonlinear two-dimensional (2D) FEM models are adopted to obtain numerical estimates of the thrust. The results show (1) the capability of 2D, plane stress FEM models to correctly reproduce the cyclic behavior of the studied BRBs, and (2) the difficulty in accurately measuring/computing the thrust associated to a given axial load/displacement.
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Acknowledgments
This work is dedicated to the memory of Maria Luisa Strada Gelfi. This work has been partially supported by the Italian Ministry of University and Research (MIUR). The finite-element code ABAQUS has been run at the Department of Civil Engineering, University of Brescia, under an academic license. The authors thank Mr. A. Del Barba, Mr. E. Marchina, Mr. L. Martinelli, and Mr. F. Peli of the Laboratory for Testing Materials of the Department of Civil Engineering, University of Brescia, as well as Mr. A. Ghitti, for help with the experimental part of the work. Finally, thanks are due to the Lubrogamma 2000 Srl and the Achille Strada Spa companies for providing the raw materials.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 138 • Issue 10 • October 2012
Pages: 1231 - 1243
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Jul 8, 2011
Accepted: Dec 16, 2011
Published online: Dec 21, 2011
Published in print: Oct 1, 2012
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