RESEARCH ARTICLE


Overall Stability Analysis of Improved Buckling Restrained Braces



Zhanzhong Yin*, Fucheng Bu
School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China


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Creative Commons License
©Yin and Bu; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China; Tel: +86-13919347707; Fax: +86-09312976327; E-mail: yzztianyu@126.com


Abstract

In order to improve the behavior of double-tube buckling restrained braces (BRBs), it is proposed to set contact rings between inner tube and outer tube of the brace. As a result, they can provide lateral constraint for the inner tube; this is the improved buckling restrained braces (IBRBs). In this paper, a program was edited by the language of MATLAB based on theoretical model formulation of IBRBs and applied to the calculation of overall stability strength capacity. Finite element models of IBRBs were carried out and both load displacement curves and strength capacity were obtained. Tests on IBRBs were also conducted. The results of numerical simulation agreed with the ones of the program and tests. It indicated that the program was reasonable so it could provide a basis for the analysis of overall stability strength capacity of these kinds of IBRBs.

Keywords: Finite element analysis, IBRBs, program, strength capacity, tests, theoretical.