文献类型：期刊文献

英文题名：Contact Algorithm for Determining Aperture Evolution of Rock Fracture during Shearing

作者：Xiao, Weimin[1,2];Xia, Caichu[1];Wang, Wei[3];Du, Shigui[4];Deng, Ronggui[5]

机构：[1]Tongji Univ, Dept Geotech Engn, Shanghai, Peoples R China;[2]Sichuan Agr Univ, Sch Civil Engn, Dujiangyan 611830, Sichuan Provinc, Peoples R China;[3]Min Hang Sub Stn, Construct Safety & Qual Supervis Stn, Shanghai 201100, Peoples R China;[4]Shaoxing Univ, Coll Civil Engn, Shaoxing 312000, Zhejiang, Peoples R China;[5]Southwest Jiaotong Univ, Dept Geotech Engn, Chengdu 610031, Sichuan Provinc, Peoples R China

年份：2016

卷号：16

期号：3

外文期刊名：INTERNATIONAL JOURNAL OF GEOMECHANICS

收录：SCI-EXPANDED(收录号：WOS:000379983600017)、、EI(收录号：20162402490207)、Scopus(收录号：2-s2.0-84973332989)、WOS

基金：This research was supported by research grants from the National Natural Science Foundation of China (51278378, 41272321, and 41327001), the Major State Basic Research Development Program of China (973 Program, 2011CB013800), and the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT, IRT1029).

语种：英文

外文关键词：Rock fracture; Surface topography; Contact algorithm; Aperture; Dilation

外文摘要：A contact algorithm to determine the aperture evolution of a rock fracture during shearing is reported. The algorithm was based on a theoretical normal closure model and semianalytical dilation model and required only the three-dimensional topography data of the two fracture surfaces at the initial stage before shearing. It allowed the prediction of the aperture distribution of a fracture under normal stress and various shear displacements, which is difficult to observe in coupled shear-flow tests. To ensure the precision of the surface topography data, a laser-scanning profilometer system was used for surface topography measurement. The contact algorithm was then used to predict the aperture evolution of a marble fracture during shearing. The results of aperture variation under normal stress and shear displacement were analyzed and compared with an equivalent aperture derived from back-calculation of flow test results. The results indicated that the contact algorithm is efficient in predicting aperture evolution. (C) 2015 American Society of Civil Engineers.