Available online at www.CivileJournal.org Civil Engineering Journal (E-ISSN: 2476-3055; ISSN: 2676-6957) Vol. 7, No. 04, April, 2021 633 Seismic Evaluation of New Steel Infill Panels for Steel Shear Walls Ali Joharchi 1* , Siti Aminah Osman 1 , Mohd Yazmil Md Yatim 1 , Mohammad Ansari 1 1 Department of Civil Engineering, Universiti Kebangsaan Malaysia, UKM, 43600 Bangi, Selangor, Malaysia. Received 10 January 2021; Revised 17 March 2021; Accepted 27 March 2021; Published 01 April 2021 Abstract Corrugated Steel Shear Wall (CSSW) is an efficient shear wall system, which has higher energy dissipation capacity, ductility and stiffness when compared to the Steel Plate Shear Wall (SPSW) with flat infill plate. Despite of these advantages, the ultimate load of CSSW is lower than that of SPSW. Various studies conducted to improve the cyclic behavior of CSSW revealed that increasing corrugation angle might enhance energy dissipation capacity and toughness of CSSWs. However, the ultimate load of CSSW was not improved by increasing the corrugation angle. Thus, the current study proposed new corrugated infill panel schemes to improve the ultimate load of CSSWs. To this end, Finite Element (FE) models were established using ABAQUS/Standard and verified with the experimental results from previous researches. The corrugation angle of the proposed plates was found based on a numerical investigation on seven CSSW FE models with the corrugation angle ranges from 30° to 120°. The FE results revealed that the model with the corrugation angle of 120 achieved highest ultimate load, energy dissipation capacity and toughness amongst the CSSW models. In addition, the ultimate loads, energy dissipation capacities and toughness of the proposed infill plates were up to 11.8%, 53.9% and 8.8% respectively higher than those of CSSW model with the corrugation angle of 120°. Furthermore, the proposed infill plates use up to 13.4% lower amount of steel compared to the corrugated plate with the corrugation angle of 120. Keywords: Steel Plate Shear Wall; Corrugated Steel Plate; Corrugation Angle; Cyclic Loading, Finite Element. 1. Introduction Steel Plate Shear Wall (SPSW) is an economic and highly efficient lateral load resisting system suitable for steel structures in seismic hazard zones, due to its high strength, ductility, stiffness and energy absorption capacity. The steel shear wall consists of boundary frame and an infilled steel plate. The behavior of SPSWs is mostly affected by the early elastic buckling of the infilled plate. Several experimental and numerical studies revealed that welding stiffeners to the infill steel plate could improve the stiffness and strength of SPSWs [1–3]. However, welding stiffeners is a time-consuming procedure and mainly increase the cost of construction. Using corrugated steel plate is another way to improve the buckling resistance of the thin steel plate. To date, several numerical and experimental studies have investigated the behavior of Corrugated Steel Shear Walls (CSSW) with curved and trapezoidal corrugated steel plate under monotonic and cyclic loading. Based on the comparison of the numerical results [4-6], trapezoidal CSSWs depicted slightly higher ultimate load, energy dissipation and toughness compared to the curved CSSWs. Furthermore, the connection between thin steel plate and boundary frame is easier for the trapezoidal corrugated plate. * Corresponding author: ali.joharchi1984@gmail.com http://dx.doi.org/10.28991/cej-2021-03091678 © 2021 by the authors. Licensee C.E.J, Tehran, Iran. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).