Numerical prediction of seismic resistance and energy dissipation in CFRP-reinforced concrete shear walls under cyclic loading

In this study, a nonlinear finite element modeling (FEM) approach was developed using SeismoStruct v2024 to conduct Static Time History Analysis (STHA) and predict the cyclic behavior of shear wall (SHW) structures. The FEM model incorporates element properties to simulate the constrained deformation resulting from CFRP wrapping, and an enhanced concrete stress–strain relationship is employed to account for the improvements in concrete strength and ductility under CFRP confinement. A damage-plasticity-based concrete model is used to capture the cyclic behavior of concrete accurately. Additionally, a method is proposed to identify the modes failure due to CFRP and concrete rupture within the FEM framework. The model is validated against experimental results, demonstrating its capability to reasonably predict shear failure and cyclic hysteresis behavior in CFRP-wrapped SHWs. Finally, the results include a comparative analysis of two reinforced concrete SHWs with different parameters, predicting dissipated energy, damping ratios, and residual stiffness, thereby highlighting the influence of reinforcement type and configuration on seismic performance.