Numerical Study of a Reinforced Concrete Frame with Low Yield Point Infill Plates
Subject Areas : Analysis of Structure and Earthquake
aman hassanzade rahimabadi
1
,
yahya nasiraa
2
,
ali ghamari
3
1 - Ph.D. Candidate, Department of Civil Engineering, zanjan Branch, Islamic Azad University, zanjan, Iran
2 - Department of Civil Engineering, zanjan Branch, Islamic Azad University, zanjan, Iran
3 - Department of Civil Engineering, darehshahr Branch, Islamic Azad University, darehshahr, Iran
Keywords: Finite Element, Reinforced Concrete Frame, LYP Steel Plate, Incremental Lateral Loading,
Abstract :
The first steel shear walls were mainly utilized in retrofitted form, but steel shear walls are now known to offer reliable performance without stiffeners. With low thickness and yield strength, the plate would buckle under small loads, transitioning from an in-plane shear mechanism to the diagonal tension field. Using ABAQUS, the present study takes a numerical approach and investigates a three-story, single span Reinforced Concrete Frame (RCF) with Low Yield Point (LYP) steel infill plates. A total of 45 models were studied. The yield stress of the shear wall, shear wall thickness, and the span-to-height ratio of the RCF were evaluated for the RCF, and the numerical models were compared in terms of secant stiffness, yield load, maximum load, yield displacement, and dissipated energy. Changing the span-to-height ratio and the thickness and yield strength of the LYP steel plate, increased the secant stiffness by, respectively, 49.39, 45.59, and 59.67%, the ultimate strength by 27.64, 30.88, and 40.73%, and energy dissipation by 32.35, 34.19, and 44.9%. The failure modes in the numerical models of RCFs with LYP steel plate shear walls resulted from local buckling and wrinkling of the steel infill plate. The yield strength of the LYP steel plate was found to control the stiffness, flexural strength, and energy dissipation in the RCF with a steel plate shear wall. Moreover, longitudinal cracks were created in the concrete in columns and beams due to the transfer of momentum by the tension field of the steel infill plates.
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