Estimating the Seismic Performance of CFRP-Retrofitted RC Beam-Column Connections Using Fiber-Section Analysis |
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Authors: | Davood Mostofinejad Alireza Akhlaghi Abolfazl Eslami |
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Institution: | 1. Department of Civil Engineering, Isfahan University of Technology, Isfahan, Iran;2. Department of Civil Engineering, Universite de Sherbrooke, Sherbrooke, Canada;3. Department of Civil Engineering, Yazd University, Yazd, Iran |
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Abstract: | Over the past two decades, many experimental techniques have been developed to improve the efficiency of the externally-bonded fiber-reinforced polymers (FRPs) in order to improve the structural performance of reinforced concrete (RC) beam-column connections. Numerical analysis is also being used as a cost-effective tool to predict the experimental results and to further investigate the parameters that are beyond the scope and capacity of experimental tests. In this study, at first, a fiber-section modeling approach is developed for estimating the seismic behavior of RC beam-column connections before and after application of FRP retrofits. The accuracy of the analysis results were validated against a series of the available experimental data under both monotonic and cyclic loadings. It was pointed out that the proposed model can predict the strength and displacement of un-retrofitted and FRP-retrofitted RC beam-column connections up to the failure points. The verified model was then used to perform a parametric study pertaining to the effect of longitudinal reinforcement ratio on the efficiency of the adopted FRP retrofitting technique to improve the structural behavior of RC beam-column connections. |
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Keywords: | RC Beam-Column Connections CFRP Fiber-Section Analysis Seismic Retrofitting Strength Displacement Ductility |
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