Istrazivanja i projektovanja za privreduJournal of Applied Engineering Science

EVALUATION OF STRUCTURAL RESPONSE OF COMPOSITE STEEL-CONCRETE ECCENTRICALLY BUCKLING-RESTRAINED BRACED FRAMES


DOI: 10.5937/jaes0-25497 
This is an open access article distributed under the CC BY 4.0
Creative Commons License

Alireza Bahrami*
Department of Building Engineering, Energy Systems, and Sustainability Science, Faculty of Engineering and Sustainable Development, University of Gävle, Sweden

Mahmood Heidari
Department of Civil Engineering, Abadan Branch, Islamic Azad University, Abadan, Iran

The main purpose of this paper is to evaluate the structural response of composite steel-concrete eccentrically buckling-restrained braced frames (BRBFs). The fi nite element (FE) software ABAQUS is employed to nonlinearly analyse the BRBFs. Comparing the modelling and experimental test results validates the FE modelling method of the BRBF. Three different strong earthquake records of Tabas, Northridge, and Chi-Chi are selected for the nonlinear dynamic analyses. A BRBF is then designed having a shear link. Afterwards, the designed BRBF is analysed under the selected earthquake records using the validated modelling method. The lateral displacements, base shears, and energy dissipations of the frame and shear link rotations are achieved from the analyses of the BRBF. The results are compared and discussed. The obtained BRBF results are also compared with their corresponding steel eccentrically braced frame (EBF) results. It is concluded that the BRBF can generally accomplish the improved structural response compared with the EBF under the earthquake records. Meanwhile, the BRBF has larger base shear capacity than the EBF. Furthermore, the BRBF dissipates more energy than the EBF.

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