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http://dx.doi.org/10.12989/eas.2015.8.6.1349

Nonlinear dynamic response of reinforced concrete building retrofitted with buckling restrained braces  

Guneyisi, Esra Mete (Department of Civil Engineering, Gaziantep University)
Tunca, Osman (Department of Civil Engineering, Gaziantep University)
Azez, Ibrahim (Department of Civil Engineering, Gaziantep University)
Publication Information
Earthquakes and Structures / v.8, no.6, 2015 , pp. 1349-1362 More about this Journal
Abstract
This paper presents an analytical study aimed at evaluating the effectiveness of using buckling-restrained braces (BRBs) in mitigating the seismic response of a case study 6 storey reinforced concrete (RC) building. In the design of the BRBs with non-prismatic cross-sections, twelve combinations of ${\alpha}$ and ${\beta}$ design parameters that influence the strength and stiffness of the BRBs, respectively, were considered. The response of the structure with and without BRBs under earthquake ground accelerations were evaluated through nonlinear dynamic analysis. Two sets of ground motions representative of the design earthquake with 10% and 50% exceedance probability in fifty years were taken into account. By comparing the structural performance of the original and buckling restrained braced structures, it was observed that the use of the BRBs were very effective in mitigating the seismic response as a retrofit scheme. However, the selection of the strength and stiffness parameters of the BRBs had considerable effect on the response characteristics of RC structures. For instance, by increasing the value of ${\alpha}$ and by decreasing the value of ${\beta}$ of the buckling-restrained braces, the maximum deformation demand of the structures increased.
Keywords
buckling restrained brace; nonlinear dynamic analysis; reinforced concrete building; seismic response;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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