文献类型：期刊文献

英文题名：An Analytical Model for Two-Order Asperity Degradation of Rock Joints Under Constant Normal Stiffness Conditions

作者：Li, Yingchun[1,2];Wu, Wei[3];Li, Bo[4]

机构：[1]Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian, Peoples R China;[2]Henan Polytech Univ, Open Lab Deep Mine Construct, Jiaozuo, Peoples R China;[3]Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore, Singapore;[4]Shaoxing Univ, Sch Civil Engn, Shaoxing, Peoples R China

年份：2018

卷号：51

期号：5

起止页码：1431

外文期刊名：ROCK MECHANICS AND ROCK ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000431174000008)、、EI(收录号：20180504693021)、Scopus(收录号：2-s2.0-85041125028)、WOS

基金：Yingchun Li thanks the support from the Fundamental Research Funds for the Central University (Grant No. DUT17RC(3)032) and the Open Laboratory for Deep Mine Construction, Henan Polytechnic University, China (Grant No. 233 2015KF-02). Wei Wu gratefully acknowledges the support of the Start-Up Grant from Nanyang Technological University, Singapore.

语种：英文

外文关键词：Rock joint; Constant normal stiffness; Shear behaviour; Waviness and unevenness

外文摘要：Jointed rock masses during underground excavation are commonly located under the constant normal stiffness (CNS) condition. This paper presents an analytical formulation to predict the shear behaviour of rough rock joints under the CNS condition. The dilatancy and deterioration of two-order asperities are quantified by considering the variation of normal stress. We separately consider the dilation angles of waviness and unevenness, which decrease to zero as the normal stress approaches the transitional stress. The sinusoidal function naturally yields the decay of dilation angle as a function of relative normal stress. We assume that the magnitude of transitional stress is proportionate to the square root of asperity geometric area. The comparison between the analytical prediction and experimental data shows the reliability of the analytical model. All the parameters involved in the analytical model possess explicit physical meanings and are measurable from laboratory tests. The proposed model is potentially practicable for assessing the stability of underground structures at various field scales.