Numerical studies on the seismic behavior of reinforced concrete structures Strengthened with CFRP

Enhancing the seismic resilience of reinforced concrete structures remains a critical endeavor in civil engineering. While substantial strides have been made in seismic risk management, particularly in seismic monitoring and building code enhancements, the challenge persists for existing structures, which often lack sufficient seismic resistance. Addressing this necessitates the advancement of reinforcement and repair methodologies. One innovative approach gaining recognition is the use of carbon fiber reinforced polymer (CFRP) for bolstering the structural integrity of aging and compromised buildings. This study aims to assess the efficacy of seismic reinforcement in reinforced concrete structures through CFRP integration. Specifically, it investigates potential enhancements in seismic resistance and overall structural performance facilitated by these composite materials. Through numerical analysis, this research scrutinizes the influence of CFRP as a confining composite material on reinforced concrete columns. A finite element model is developed and validated against experimental data, followed by a parametric study evaluating different CFRP configurations. Subsequently, nonlinear static analysis is conducted on a building to gauge its capacity with and without CFRP integration. The findings indicate significant improvements in load-bearing capacity and ductility, with a notable reduction in damage index, underscoring the enhanced structural performance conferred by CFRP reinforcement.