Numerical Assessment on Bonded and Unbonded Prestressed Concrete Beams

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 validated. Numerical assessments are conducted for simply supported continuous scenarios, focusing on effects condition level. results show that exhibit better crack pattern (i.e., smaller width larger zone) than beams. ultimate loads or deflections depends heavily level (the values around 64% 94% those at levels 25% 75%, respectively). Unbonded tendons produce greater moment redistribution scenarios It also shown ACI code cannot well describe impact scenarios. modified equation proposed, which can predict accurately both