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基于分离式Hopkinson压杆系统提出一套Hopkinson束杆装置,研究水泥砂浆节理面在压剪复合加载下的动态界面滑移特性。应用三根小杆作为接收杆,分别采用单杆和三杆两种入射方式,对含有节理面的水泥砂浆试件进行冲击加载。在节理面发生滑动时,由三根接收杆测试得到水泥砂浆试件不同位置滑移状态,进而得出节理面的整体滑移速度。此研究初步揭示了节理面在发生滑移时的局部滑移状态以及整体滑移状态,为节理面的动摩擦特性研究提供了较可靠的实验技术。
Based on the split Hopkinson pressure bar system, a Hopkinson beam bar device is proposed to study the dynamic interface slip behavior of cement mortar joints under the condition of pressure and shear loading. Three small rods were used as the receiving rods, and the single-rod and three-rod methods were used respectively to impact load the cement mortar specimens with joint surfaces. When the joint surface slips, the sliding state of the cement mortar specimen at different positions is obtained by the three receiving rods test, and then the overall sliding velocity of the joint surface is obtained. This study initially revealed the local slip state and the global slip state of the joint surface in the event of slippage, which provided a reliable experimental technique for the study of dynamic friction characteristics of the joint surface.