文献类型：期刊文献

英文题名：Influence of Joint Roughness on the Shear Behaviour of Fully Encapsulated Rock Bolt

作者：Wu, Xuezhen[1,2];Jiang, Yujing[2,3,4];Li, Bo[5]

机构：[1]Fuzhou Univ, Coll Civil Engn, Fuzhou 350108, Fujian, Peoples R China;[2]Nagasaki Univ, Grad Sch Engn, Bunkyo Machi 1-14, Nagasaki 8528521, Japan;[3]Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China;[4]Shandong Univ Sci & Technol, Minist Sci & Technol, Qingdao 266590, Peoples R China;[5]Shaoxing Univ, Rock Mech & Geohazards Ctr, Shaoxing 312000, Peoples R China

年份：2018

卷号：51

期号：3

起止页码：953

外文期刊名：ROCK MECHANICS AND ROCK ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000426760700019)、、EI(收录号：20175004525722)、Scopus(收录号：2-s2.0-85037615424)、WOS

基金：This study has been funded by the Natural Science Foundation of China (No. 51379117; No. 51609136).

语种：英文

外文关键词：Rock bolt; Joint roughness; Shear behaviour; Laboratory test; Mathematical model

外文摘要：The shear behaviour of rock bolt inserted in rough joints, with the JRC ranging from 0 to 18, was investigated with a series of single shear tests. The results indicated that the shear behaviour of rock bolt was strongly influenced by the joint roughness. The shear resistance reached to a large value in the early stage for most case of rough joints. The shear dilatancy of bolted rock joints was smaller than the ones without rock bolt for the same JRC condition. A dimensionless mathematical model was established to predict the shear behaviour of rock bolt inserted in different roughness conditions. As the contribution of rock bolt on the shear resistance has a nonlinear relationship with the joint roughness, whereas the maximum shear displacement exhibits good linearity with a high correlation coefficient. The maximum shear resistance of rock bolt was evaluated as a negative exponential function of JRC. The maximum shear displacement of rock bolt was evaluated as a linear function of JRC. Two tests with natural rough joints were conducted to verify the applicability of the proposed mathematical model. The predicted values of maximum rock bolt and maximum rock bolt indicated good agreement with the test results with an average estimation error of 8.3%.