Performance Evaluation of CFRP Sheets in Reinforcing RC Slab-Column Connection

Document Type : Research Paper

Authors

1 Department of Civil Engineering, Mahabad Branch, Islamic Azad University, Mahabad, Iran.

2 Department of Civil Engineering, Mahabad Branch, Islamic Azad University, Mahabad, Iran

10.22124/jcr.2024.24287.1619

Abstract

In concrete slabs, due to the absence of support beams, three-dimensional shear stresses are created around the slab-column connection area, leading to radial shear cracks and punching shear in the column-slab connection area. In this article, for evaluating the strengthening of the slab-column connection using CFRP sheets under the conditions of punching shear and seismic loading, the numerical method has carried parametric studies out. Therefore, considering 5 variables: loading conditions, number of fiber layers in the sheet, angle of fiber placement, sheet thickness, and dimensions of CFRP sheets, parametric studies have been carried out in the form of 33 separate models by Abaqus finite element software. Validation of the numerical model was evaluated based on the modeling of the laboratory sample. The results showed that the average error of numerical modeling was 5.2% compared to the laboratory sample, indicating the numerical model's acceptable accuracy. Also, the results showed that the two parameters of sheet thickness and dimensions are the main parameters in strengthening the RC slab-column connection, so considering the optimal values of about 98% reduces the damage to the concrete slab. The results of this research can be used as a comprehensive model for the design and application of CFRP sheets in strengthening the concrete column-slab connection.

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References

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