| 要旨 |
The requirements of forming arch action are that the bond stress in shear span is removed, and that the anchorage performances well to restrain arch support from slipping. Two methods are adopted to remove the bond stress. One is applying wax between ridges and then wrapping it with tape and then applying lubricant on the surface of the tape (series BN), the other is the accelerating galvanic corrosion. About the contact surface between tensile reinforcement and stirrups, in the former specimens, there is no contact force; while in the latter beams there is residual bond stress more or less. |