The stress relaxation characteristic of rock mass is an important aspect of rheology and has important practical significance for rock engineering. In order to investigate the relaxation characteristic of rock joints with different slope ratios and normal stresses, a series of shear stress relaxation tests were conducted on artifical rock joints poured by cement mortar. Test results show that the relaxation curves can be divided into three stages, i.e. instantaneous relaxation stage, attenuation relaxation stage, and stable relaxation stage. Furthermore, the nonlinear Maxwell relaxation equation was obtained by using the relation between the viscosity coefficient and time, and the theoretical curves based on the empirical equation agreed well with the test results. Moreover, the change law of the initial viscosity coefficient was investigated. Accordingly, a stress relaxation method, termed as relaxation stress peak method, was proposed to determine the long-term strength of rock joints.
Accepted:
Published online:
Ang Liu 1, 2; Guanghui Tian 3; Qingzhao Zhang 4; Wenli Lin 5; Jingcai Jiang 2
@article{CRMECA_2018__346_12_1179_0, author = {Ang Liu and Guanghui Tian and Qingzhao Zhang and Wenli Lin and Jingcai Jiang}, title = {Shear relaxation characteristics of rock joints under stepwise loadings}, journal = {Comptes Rendus. M\'ecanique}, pages = {1179--1191}, publisher = {Elsevier}, volume = {346}, number = {12}, year = {2018}, doi = {10.1016/j.crme.2018.09.001}, language = {en}, }
TY - JOUR AU - Ang Liu AU - Guanghui Tian AU - Qingzhao Zhang AU - Wenli Lin AU - Jingcai Jiang TI - Shear relaxation characteristics of rock joints under stepwise loadings JO - Comptes Rendus. Mécanique PY - 2018 SP - 1179 EP - 1191 VL - 346 IS - 12 PB - Elsevier DO - 10.1016/j.crme.2018.09.001 LA - en ID - CRMECA_2018__346_12_1179_0 ER -
%0 Journal Article %A Ang Liu %A Guanghui Tian %A Qingzhao Zhang %A Wenli Lin %A Jingcai Jiang %T Shear relaxation characteristics of rock joints under stepwise loadings %J Comptes Rendus. Mécanique %D 2018 %P 1179-1191 %V 346 %N 12 %I Elsevier %R 10.1016/j.crme.2018.09.001 %G en %F CRMECA_2018__346_12_1179_0
Ang Liu; Guanghui Tian; Qingzhao Zhang; Wenli Lin; Jingcai Jiang. Shear relaxation characteristics of rock joints under stepwise loadings. Comptes Rendus. Mécanique, Volume 346 (2018) no. 12, pp. 1179-1191. doi : 10.1016/j.crme.2018.09.001. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2018.09.001/
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