Usage of EB-CFRP for Improved Flexural Capacity of Unbonded Post-Tensioned Concrete Members Exposed to Partially Damaged Strands

The study presents the performance of flexural strengthening concrete members exposed to partially unbonded prestressing with a particular emphasis on amount (0, 14.2, and 28.5%) cut strands-symmetrical asymmetrical damage. In addition examining influence strands remaining capacity post-tensioned effectiveness carbon fiber reinforced polymer laminates restoration, investigated results rectangular subjected four-point static bending load based composition laminate affected stress CFRP, failure mode, strength deflection are covered in this study. experimental revealed that usage CFRP has considerable impact strand strain. that, stiffness strengthened becomes increasingly significant within serviceability phases as damaged ratios increase. EB-CFRP increased by approximately 13%, which corresponds damage 14.28% about 9.5% for 28.57% damage, represents one unique findings field. Additionally, semi-empirical equations forecasting actual strain tendons were presented. suggested simple solve produce precise results. Doi: 10.28991/CEJ-2022-08-06-014 Full Text: PDF