焊钉橡胶组合连接件抗剪性能试验

Experiments on Shear Capacity of Studrubber Composite Shear Connector

摘要:

为了在确保钢与混凝土连接件抗剪承载力不变的情况下达到降低抗剪刚度的目的，提出了焊钉杆部外套橡胶的组合连接件构造.以橡胶套设置与否以及橡胶套的高度、厚度为参数进行了18个模型试件在单调和反复加载作用下的抗剪推出试验，结果表明，外套橡胶的组合连接件相比于普通焊钉连接件其抗剪承载力基本保持不变，抗剪刚度显著减小；在反复加载作用下两者具有相同的变形恢复性能；组合连接件的橡胶套高度宜小于焊钉高度的3/4、厚度在到达焊钉直径的1/8时已经能够起到显著减小抗剪刚度的效果.

Abstract:

A new kind of shear connector compositing the ordinary stud and the rubber sleeve was proposed to decrease the shear stiffness of the shear connector without changing its shear strength. Eighteen push out tests were conducted to investigate the effects of the height and thickness of the rubber sleeve on the behavior of the composite shear connector. The test results show that the stiffness of the composite shear connector is significantly lower than the ordinary stud, while the shear strength change is negligible. Under repeated loading, the composite shear connector shows better deflection recovery in comparison with the ordinary stud. Moreover, it is indicated that the rubber sleeve’s height should be less than 3/4 of the height of the stud, while the stiffness of the shear connector can be reduced significantly when the rubber sleeve’s thickness is more than 1/8 of the diameter of the stud.