Deformation tests and failure process analysis of an anchorage structure  

作　　者：Zhao Tongbin Yin Yanchun Tan Yunliang Song Yimin 

机构地区：[1]State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology,Shandong University of Science and Technology [2]Faculty of Resources and Safety Engineering,China University of Mining and Technology [3]College of Architectural Engineering,North China University of Technology

出　　处：《International Journal of Mining Science and Technology》2015年第2期237-242,共6页矿业科学技术学报（英文版）

基　　金：financially supported by the National Key Basic Research Program of China (No.2010CB226805);the National Natural Science Foundation of China (Nos.51474136 and 51474013);the Opening Project Fund of State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology (No.MDPC2013KF06);the Research Award Fund for the Excellent Youth of Shandong University of Science and Technology (No.2011KYJQ106)

摘　　要：In order to study the failure process of an anchorage structure and the evolution law of the body＇s defor- mation field, anchor push-out tests were carried out based on digital speckle correlation methods （DSCM）. The stress distribution of the anchorage interface was investigated using the particle flow numerical simulation method. The results indicate that there are three stages in the deformation and fail- ure process of an anchorage structure： elastic bonding stage, a de-bonding stage and a failure stage. The stress distribution in the interface controls the stability of the structure. In the elastic bonding stage, the shear stress peak point of the interface is close to the loading end, and the displacement field gradually develops into a ＂V＂ shape, in the de-bonding stage, there is a shear stress plateau in the center of the anchorage section, and shear strain localization begins to form in the deformation field. In the failure stage, the bonding of the interface fails rapidly and the shear stress peak point moves to the anchorage free end. The anchorage structure moves integrally along the macro-cracl~ The de-bonding stage is a research focus in the deformation and failure process of an anchorage structure, and plays an important guiding role in roadway support design and prediction of the stability of the surrounding rock.In order to study the failure process of an anchorage structure and the evolution law of the body’s deformation field,anchor push-out tests were carried out based on digital speckle correlation methods(DSCM).The stress distribution of the anchorage interface was investigated using the particle flow numerical simulation method.The results indicate that there are three stages in the deformation and failure process of an anchorage structure:elastic bonding stage,a de-bonding stage and a failure stage.The stress distribution in the interface controls the stability of the structure.In the elastic bonding stage,the shear stress peak point of the interface is close to the loading end,and the displacement field gradually develops into a‘‘V’’shape.In the de-bonding stage,there is a shear stress plateau in the center of the anchorage section,and shear strain localization begins to form in the deformation field.In the failure stage,the bonding of the interface fails rapidly and the shear stress peak point moves to the anchorage free end.The anchorage structure moves integrally along the macro-crack.The de-bonding stage is a research focus in the deformation and failure process of an anchorage structure,and plays an important guiding role in roadway support design and prediction of the stability of the surrounding rock.

关 键 词：Anchorage structure Digital speckle correlation methods Deformation field Interface stress Failure process 

分 类 号：TD322[矿业工程—矿井建设]