3.2 Bond mechanism Deformed Bar-Mechanical interlock Radial tensile stress Bearing stress Internal Radial crack Uncracked diagonal concrete crack Deformed bar Longitudinal Radial Internal crack component component zone 上本工程学院 9 3.2 Bond mechanism ◼ Deformed Bar ─ Mechanical interlock Internal diagonal crack Deformed bar Longitudinal component Bearing stress Radial tensile stress Uncracked concrete Radial crack Radial component Internal crack zone