Study on the Structural Performance of Pre-Damaged Perforated Wide Shallow RC Beams Repaired with CFRP Composites
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This research presents the results of a numerical simulation conducted using ABAQUS/CAE finite element software. The research sought to establish a simulation model capable of predicting the structural performance of pre-damaged perforated wide shallow reinforced concrete (RC) beams repaired with different Carbon Fiber Reinforced Polymer (CFRP) composites. Numerous investigations on CFRP composites in perforated wide beams are few, characterized by low representational precision and inferior material quality. The findings were assessed against published experimental data in the current literature. The numerical method and the experimental data were very similar; hence, the simulated model was considered legitimate. Subsequently, the scope of numerical studies was expanded to include the examination of several factors, including the pre-damage percentage, aperture configuration, and the number of openings. The results show that the percentage of damage is inversely proportional to the load-carrying capacity of the wide beams. Wide beams with circular openings have a higher load-carrying capacity than those with square openings. Using circular openings instead of square ones increases strength by about 11.3%, 25.4%, and 36.5% for three, five, and seven openings, respectively. Despite openings that weakened the wide beams, strengthening with CFRP laminates restored their load-bearing capacity and even exceeded it. The increase in load-bearing capacity of the strengthened perforated wide beams ranged from 82% to 161% compared to the un-strengthened solid wide beam.
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