单面攻丝高强螺栓抗剪连接承载性能试验研究

Experimental Study on Bearing Capacity of Shear Connection of Single Side Tapping High Strength Bolt

摘要: 本文针对高强螺栓单面攻丝抗剪连接的承载性能开展了试验研究，分别测得了单个螺栓在摩擦阶段的极限抗剪承载力和在承压阶段的极限抗剪承载力。试验结果表明：攻丝型高强螺栓连接按承压型高强螺栓受剪来设计时，试验测得的螺栓极限抗剪承载力平均值较计算得到的螺栓极限抗剪承载力均有较大的安全储备，可以满足承压型高强螺栓的设计要求；但按摩擦型高强螺栓受剪来设计时，试验得到的螺栓抗剪承载力平均值较按规范计算的抗剪承载力富余量较少，并且试验得到的板件间相对滑移比较大，不能满足摩擦型高强螺栓抗剪时的正常使用极限状态要求。

Abstract: In this paper, the load-bearing capacity of high-strength bolts with single-side tapping shear connection was experimentally studied. The ultimate shear capacity of a single bolt in the friction stage and the ultimate shear capacity in the pressure stage were measured respectively. The test results show that when the tapping high-strength bolt connection is designed according to the pressure type high-strength bolt, the average value of the ultimate shear capacity of the bolt measured by the test has a larger safety reserve than the calculated ultimate shear capacity of the bolt, which can meet the design requirements of the pressure type high-strength bolt. However, when it is designed according to the friction type high-strength bolt, the average value of the shear bearing capacity of the bolt obtained by the test is less than that calculated by the standard, and the relative slip between plates obtained by the test is relatively large, which cannot meet the normal use limit state requirements of the friction type high-strength bolt in shear.