应用杆束系统研究水泥砂浆节理面的压剪动特性  

On the Dynamic Compression-shear Characteristics of Cement Mortar Joint Surface based on a Bunched Bar System

作　　者：张磊[1] 徐松林[1] 施春英[1] 

机构地区：[1]中国科学技术大学中国科学院材料力学行为和设计重点实验室,合肥230027

出　　处：《实验力学》2016年第2期175-185,共11页Journal of Experimental Mechanics

基　　金：国家自然科学基金(No:11272304;11472264)

摘　　要：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。In order to study the dynamic slipping characteristics of cement mortar joint surface under compression-shear combined loading, a Hopkinson bunched bars device was proposed based on split Hopkinson pressure bar （SHPB） system. Three small bars are used as receiving bar; two incident modes, i.e. single-bar mode and three-bar mode, are adopted respectively; impact load was applied to cement mortar specimens with joint surface. During both experiments, when joint surface is slipping, the slipping state of cement mortar specimen at different positions was measured by three receiving bars, and then the overall slipping velocity of joint surface was obtained. Above results preliminarily reveal the local slipping state and overall slipping state of slipping joint surface, and provide a relatively reliable experimental technique for the study of joint surface dynamic frietion characteristics.

关 键 词：冲击动力学 Hopkinson杆束系统 动摩擦特性 节理面滑动 

分 类 号：O347.4[理学—固体力学]