Experimental Study on Shear Performance of Steel-Concrete Interface Bonded with Bolt and Epoxy

Abstract:

To further obtain the shear capacity of the steel-concrete interface connected by bolts and epoxy, three sets of push-out tests were made and analyzed, including bolt reinforcement specimens, epoxy reinforcement specimens and bolt and epoxy reinforcement specimens. The failure mode, shear force-displacement curve, ultimate bearing capacity and shear stiffness were measured by the push-out test. The research shows that the stiffness of bolt reinforcement specimens is much smaller than that of epoxy reinforced specimens, and the slip before reaching the ultimate shear strength is much larger than that of epoxy reinforced specimen. Before reaching the peak load, for the specimens with fewer anchor bolts, the epoxy bears almost all the load, and the specimens slip obviously when the specimen was damaged. This paper puts forward a more widely used calculation formula used to calculate the shear capacity of bolt and epoxy reinforcement specimens, which can be used in the calculation of shear capacity of large-area reinforcement specimens and high-strength concrete reinforcement specimens.