锚栓与粘钢连接件抗剪承载性能试验研究

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

摘要:

为进一步探究锚栓与粘钢共同连接形成的钢混界面抗剪承载性能,制作并分析了三组推出试件,分别为锚栓连接试件、粘钢连接试件以及锚栓与粘钢连接试件。通过推出试验得到三组试件的剪切破坏形态、剪力滑移曲线、极限荷载与抗剪刚度。研究显示,锚栓连接试件刚度远小于粘钢连接试件,且在达到极限抗剪承载力前,其滑移远大于粘钢连接试件。对于锚栓个数较少的锚栓与粘钢连接试件,在达到峰值荷载前,胶黏剂几乎承担了所有的荷载,试件破坏时有明显滑移。最后提出了更广泛运用的锚栓与粘钢连接件抗剪承载力计算公式,该公式可以运用于大面积连接试件以及高强混凝土连接试件的抗剪承载力计算。

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.