Evaluation seismic behavior of steel frame with infill plate and eccentric brace

Articles in Press

Document Type : Civil Article

Authors

1 Assistant prof at Department of Civil Engineering,, Islamic Azad University, Maragheh Branch< Maragheh, Iran

2 PhD Student, Department of Civil Engineering, Maragheh Branch, Islamic Azad University, Maragheh, Iran

3 Assistant professor, Department of Civil Engineering, Azarshahr Branch, Islamic Azad University, Azarshahr, Iran

Abstract

Steel Plate Shear Walls (SPSW) are modern earthquake-resistant systems. One of the important design challenges of steel shear walls is the possibility of creating an opening in the steel plate. This process decreases the stiffness, ductility, and strength of SPSWs. In the present study, a new bearing system is proposed considering the opening in the steel plate, and controlling the buckling, in the wall using eccentric braces at the edge of the opening. The proposed models are designed in compliance with AISC 341 provisions and then subjected to 7 earthquake records. The results of the dynamic analyses are compared with those of the steel shear wall model without opening. The results of numerical models show that the steel shear wall participates, 80% in load resisting. In the model with a middle beam between two braces (M3), and the model with a central middle beam(M2), the participation of the steel plate is 60% and 30% of the total lateral load, respectively. In the models with the central middle beam, the plate has entered the plastic stage, and all the boundary elements and braces almost remain elastic. Moreover, a sudden decrease or increase due to sudden yielding or failure of elements is not observed in the proposed system under dynamic loading.

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Journal of Modeling in Engineering

Articles in Press, Accepted Manuscript
Available Online from 26 May 2025

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History

  • Receive Date: 17 March 2024
  • Revise Date: 08 February 2025
  • Accept Date: 01 March 2025

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