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Volume Title: ICASGE2023

DOI: ICASGE-STA

Hamdy M Abou-Elfath; Mostafa Shawky Ramadan; Mohab Riad Turkomany ; Hamdy M Abou-Elfath; Mostafa Shawky Ramadan; Mohab Riad Turkomany

Structural Eng. Department, Alexandria University

Current seismic design philosophy of building structures relies on the inelastic response of the main structural elements as the principal source for dissipating the seismic energy. This philosophy results in considerable levels of residual drifts which make buildings appear unsafe to residents and in some cases may lead to building complete demolition. In the past two decades, considerable research efforts have been directed toward the development of self-centering (SC) earthquake resisting structural systems that are able of preventing damage in the main structural elements and reducing the lateral residual deformations to minimal levels. One of the popular SC systems, is the recently proposed controlled rocking braced frame (CRBF) system. The SC-CRBFs have proved to be a feasible alternative to traditional systems such as buckling-restrained braced frames (BRBFs). In this paper, a comparative study is conducted between the seismic performance of both SC-CRBFs and BRBFs systems. A 6-story prototype building is designed using BRBF and SC-CRBF systems. The building is subjected to pushover static loading and a suite of earthquake records. The maximum lateral drifts and residual lateral drifts are used as the basis for the seismic performance evaluations. The findings of this study indicates that the SC-CRBF systems exhibit superior seismic performance in comparison with traditional BRBF systems.

Building; Buckling-restrained braced frame; Controlled rocking steel braced frame; Residual Drift; Damage; Earthquake

Structural Analysis (STA)