(1. School of Civil Engineering，Southwest Jiaotong University，Chengdu，Sichuan 610031，China；2. Faculty of Civil and Transportation Engineering，Guangdong University of Technology，Guangzhou，Guangdong 510006，China)
Abstract：In order to study the performance of rock-anchor system under repeated load，two tests were carried out. In the tests，the rock-anchor system was modelled by anchoring steel bar into concrete block；and then repeated load was acted on the system. From the tests，a full relation between load and displacement for the system has been obtained. By using embedded foil strain gauges，bond shear stresses were measured and the distribution of bond shear stress along the bar was achieved. The test results show that both specimens fail in anchor body pulling out from grout body. For the purpose to describe this phenomenon，a load-displacement constitutive relationship with four phases is developed on the strength of previous research. Based on the results，the reasons for bond stress change are discussed；and design recommendations based on critical displacements in different phases are suggested.
张建经1，廖蔚茗1，欧阳芳1，曲宏略1，谈一平2. 重复荷载作用下岩锚体系力学特性和黏结性能试验研究[J]. 岩石力学与工程学报, 2013, 32(4): 829-834.
ZHANG Jianjing1，LIAO Weiming1，OUYANG Fang1，QU Honglue1，TAN Yiping2. EXPERIMENTAL RESEARCH ON MECHANICAL BEHAVIOR AND
BOND PERFORMANCE OF ROCK-ANCHOR SYSTEM
SUBJECTED TO REPEATED LOAD. , 2013, 32(4): 829-834.
何思明，李新坡. 预应力锚杆作用机制研究[J]. 岩石力学与工程学报，2006，25(9)：1 876-1 880.(HE Siming，LI Xinpo. Study on mechanism of prestressed anchor bolt[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(9)：1 876-1 880.(in Chinese))
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2013, Vol. 32 
