RESEARCH ARTICLE


Finite Element Modelling and Analysis of “All-Steel” Dismountable Buckling Restrained Braces



M. D’Aniello*, 1, G. Della Corte2, R. Landolfo1
1 Department of Structures for Engineering and Architecture, University of Naples “Federico II”, via Forno Vecchio 36, 80134 Naples, Italy
2 Department of Structures for Engineering and Architecture, University of Naples “Federico II”, Via Claudio 21, 80125 Naples, Italy


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Creative Commons License
© 2014 D’Aniello et al.;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Structures for Engineering and Architecture, University of Naples “Federico II”, via Forno Vecchio 36, 80134 Naples, Italy; Tel: +39 81 2538917; E-mail: mdaniel@unina.it


Abstract

This paper describes a theoretical investigation on the response of “all-steel” dismountable buckling restrained braces (BRBs) through the analysis of finite element models (FEMs). The focus of this investigation is on a special type of BRB developed for seismic upgrading of existing reinforced concrete buildings and experimentally tested previously. After a short summary of experimental results, the paper describes the finite element models and the analysis results. Subsequently, a discussion addresses the following issues: (i) influence of the core-to-casing clearance; (ii) influence of spacing of connections along the casing longitudinal axis; (iii) compression-to-tension strength ratio; (iv) core buckling wavelengths and core-to-casing interaction forces. Finally, the paper presents a comparison of numerical results and available analytical models.

Keywords: All-steel device, buckling restrained braces, contact forces, cyclic behaviour, finite element analysis, seismic upgrading.