Effect of end anchorage length and stirrup ratio on bond and shear capacity of concrete beams with nonmetallic reinforcement

This paper presents a study on the effect of end anchorage length and stirrup ratio on bond and shear capacity of concrete beams reinforced with carbon fiber reinforced polymer (cfrp) bars. this study was carried out using test data on nine simply supported reinforced concrete beams with stirrups. the beams were subjected to two point monotonic loads and the test variables were the length of end anchorage and the stirrup ratio. theoretical equations for calculating bond strength and shear capacity obtained from literature were applied and then compared with experimental values. beams with inadequate end anchorage length showed premature bond failure even when there was sufficient stirrup ratio. beams with adequate end anchorage length failed in shear or flexure modes depending on the stirrup ratio. a numerical model for bond stress and slip in response to pullout forces was also used to determine analytically the bond stress distributions along end anchorage. the behavior of tensile force acting on the stirrups was also examined. finally,a simple model for predicting tension force acting on the stirrups was proposed. © school of engineering,taylor’s university.