Experiments on the performance of bond anchorage between high strength variable rib reinforcement and concrete
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Abstract:
To study the influence of the increase of cross rib spacing on the bond-slip behavior between 630 MPa high-strength steel bars and concrete, a test was carried out on the bond-slip behavior between steel bars and concrete by the beam bond test method, with using 42 standard shape steel bars and reinforcement with increased cross rib spacing. The influences of the thickness of concrete cover, diameter of rebars and anchorage length on the bond and anchorage performance of two types of rebars and concrete were analyzed.The results show that the bond strength between 630 MPa high-strength steel bar and concrete with increased cross rib spacing is not lower than that of standard shape high-strength steel bars, and the change of bond strength of two types of steel bars and concrete is basically consistent with that of concrete strength, steel bar diameter and anchorage length. The increase of the distance between transverse ribs has no significant effect on the bond-slip behavior of 630 MPa steel bar and concrete.
