The tendon stress in bonded prestressed concrete (BPC) beams is section-dependent while it member-dependent unbonded (UPC) beams, leading to marked difference between these two structural systems. However, little work has addressed the bond effect of steel tendons. This research presents comparative investigations BPC and UPC with various prestress levels. A numerical model experimentally valid...

Abstract The Both bonded and unbonded prestressing tendons may be used to reinforce post-tensioned (PT) concrete members. binding state of have an impact on how well different types PT elements function in flexural shear loads. Inverted-U shape reinforcement was experimentally enhance the behavior structural elements. obtained results confirmed proposed model’s accuracy for both slabs beams (bo...

Based on the bending experiment for two-span continuous post-tension beams with unbounded tendons and externally applied CFRP sheets, the analysis of the stress increment of unbonded tendons is monitored in the loading process. Since self-compacting concrete (SCC) is a suitable innovation,, understanding the implementation of this type of concrete on the ultimate unbonded tendon stress is criti...

The use of unbounded tendons is common in prestressed concrete structures and evaluation of the stress increase in unbonded tendons at ultimate flexural strength of such structure has posed a great challenge over the years. Based on the bending experiment for two-span continuous post-tension beams with unbounded tendons and externally applied CFRP sheets, the monitoring of the stress increment ...