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Structural Engineering and Mechanics Volume 89, Number 3, February10 2024 , pages 239-252 DOI: https://doi.org/10.12989/sem.2024.89.3.239 |
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Evaluation of cyclic behavior of lateral load resisting system with eccentric brace and steel plate |
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Reza Khalili Sarbangoli, Ahmad Maleki and Ramin K. Badri
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| Abstract | ||
| Steel plate shear walls (SPSWs) are classified as lateral load-resisting systems. The feasibility of openings in the steel plate is a characteristic of SPSWs. The use of openings in SPSWs can lower the load capacity, stiffness, and energy dissipation. This study proposes a novel form of SPSWs that provides convenient access through openings by combining steel plates and eccentrically braced frames (EBFs). The proposed system also avoids a substantial reduction in the strength and stiffness. Hence, various geometric forms were analyzed through two different structural approaches. Groups 1, 2, and 3 included a steel EBF with a steel plate between the column and EBF in order to improve system performance. In Group 4, the proposed system was evaluated within an SPSW with openings and an EBF on the opening edge. To evaluate the performance of the proposed systems, the nonlinear finite element method (NL-FEM) was employed under cyclic loading. The hysteresis (load-drift) curve, stress contour, stiffness, and damping were evaluated as the structural outputs. The numerical models indicated that local buckling within the middle plate-EBF connection prevented a diagonal tension field. Moreover, in group 4, the EBF and stiffeners on the opening edge enhanced the structural response by approximately 7.5% in comparison with the base SPSW system. | ||
| Key Words | ||
| cyclic load; damping; eccentrically braced frame; finite element analysis; steel infill panel | ||
| Address | ||
| Reza Khalili Sarbangoli, Ahmad Maleki: Department of Civil Engineering, Maragheh Branch, Islamic Azad University, Maragheh, Iran Ramin K. Badri: Department of Civil Engineering, Azarshahr Branch, Islamic Azad University, Azarshahr, Iran | ||