Evaluation of Cyclic Behavior of Reinforced Concrete Shearwall Having Opening by Steel Plate

Document Type : Original Research

Authors
F. abdoos 1
M. Gholhaki 2
A. Kheyroddin 3
1 M.Sc Civil Engineering, Semnan University
2 Professor, Semnan University
3 -Professor, Semnan University
10.22034/22.5.37
Abstract
Today, in building structures, concrete shear walls are widely used due to their desirable ductility and high energy dissipation. The presence of openings in the concrete shear wall changes the behavior of the wall and also creates new members in the wall, so the presence of openings in the wall behavior is very effective. Among the components of shear wall are the base walls and interface beams. A connecting beam is a beam that connects two shear walls created by an opening. The base of the wall is the vertical part of the wall that is bounded between the opening and the edge. Therefore, in this study, the behavior of eccentrically open concrete shear walls that have been reinforced by steel sheets has been investigated. In this research, a sample of concrete shear wall with eccentric opening with the name of reference sample has been validated in ABAQUS software. According to the definition of ACI318-14, one wall base is in the dimensional range of the wall and the other is in the dimensional range of the wall base. The samples were reinforced using vertical, horizontal and diagonal steel sheets simultaneously (in RCSW15 to RCSW20 samples) and in them different parameters such as increasing bearing capacity, strength, hardness, ductility and energy dissipation were studied. . In the RCSW15 and RCSW16 models, only the reinforcement around the opening is done by vertical and horizontal steel sheets. In the RCSW17 sample, horizontal, vertical and diagonal sheets are used simultaneously. The RCSW18 uses horizontal and vertical sheets in the opening corner. In the RCSW19 model, horizontal and diagonal sheets are used to reduce strain on the heel of the wall. In the RCSW20 sample, reinforcement is performed by horizontal and vertical sheets in order to increase the bending and shear capacity. Sample loading is lateral and cyclic. Among the reinforced designs of RCSW20 sample, the best design was selected because this design increased the final strength of the structure by 127.3%, increased the maximum strength by 13.42% and increased the crack resistance by 22.53%. It also increased the amount of energy consumed by 16.8%.

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مراجع
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Modares Civil Engineering journal
Volume 22, Issue 5
November and December 2022
Pages 37-48