Nonlinear Behavior of Bonded and Unbonded Two-Way Post-Tensioned Slabs Pre-Strengthened with CFRP Laminates

In this study, hybrid nonlinear finite element models (FEM) were developed to examine the flexural performance and ultimate load capacity of bonded unbonded two-way reinforced concrete post-tensioned (PT) slabs that pre-strengthened with external carbon-fiber reinforcement polymer (CFRP) laminates. Full 3D simulations, using ANSYS models, have been created for five different slab samples selected from a previously available experimental study. The model results assessed enable further numerical analysis. result calibration included measurements first crack loads, deflections, strains in extreme fiber concrete, CFRP laminates, failure modes. proved good correlation between FEM output ones. Based on this, influencing parameters affect plate stiffness, as well bending PT slabs, examined by performing detailed parametric real-life simulation, cable-to-CFRP strength contribution, laminate location selection. demonstrated strengthening laminates significantly increased ductility index both 62.18% 59.87%, respectively. addition, strip locations near supports are much more effective than middle slabs. Additionally, contribution is very considerable low ratios.