Vol. 15, No. 3, 2020

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Factors that influence the lateral contact forces in buckling-restrained braces: analytical estimates

Francesco Genna

Vol. 15 (2020), No. 3, 379–404
Abstract

An analytical technique for the calculation of the lateral contact forces in buckling-restrained braces (BRBs), proposed by Dehghani and Tremblay (2017), is critically revised and improved. The resulting algorithm is implemented and adopted with the only aim of highlighting what factors are important in the calculation of the lateral thrust in BRBs. Many of these factors seem to have a marginal importance in comparison with the buckled shape of the core, the core steel constitutive law, and the stiffness of the retention profiles. Possible conclusions deriving from this analysis are (i) only the calculation of analytical upper and lower limits for the lateral thrust in BRBs may have a sense, but these limits are always much distant from each other, and (ii) it is worthless trying to adopt over-detailed calculation techniques for this important quantity.

Dedicated to the memory of Laura Da Lisca

Keywords
buckling-restrained braces, contact forces, analytical methods
Milestones
Received: 16 March 2020
Accepted: 29 April 2020
Published: 12 July 2020
Authors
Francesco Genna
Department of Civil Engineering
University of Brescia
Brescia
Italy