Please use this identifier to cite or link to this item:
Title: Rock-joint micromechanics: Relationship of roughness to closure and wave propagation
Authors: Misra, Anil S.
Marangos, Orestes 
Keywords: Asperity;Contact;Force displacement;Micromechanics;Rock joint;Wave propagation
Category: Civil Engineering
Issue Date: 13-Jan-2012
Source: International Journal of Geomechanics, Volume 11, Issue 6, 13 January 2012, Pages 431-439
Abstract: The closure behavior of rock joints is intimately related to joint roughness. Here we utilize a micromechanical approach that explicitly considers asperity interactions on joint surfaces to study the rock-joint closure and wave propagation behavior. Elastic deformations and inelastic frictional sliding are considered at inclined asperity contacts. Rock-joint roughness is modeled through distributions of asperity heights and asperity contact orientations. The micromechanical approach developed in this paper establishes the link between the rock-joint closure behavior, the initial overlap of the joints, the asperity height distribution parameters, and the average asperity slope. The model is verified by comparison with experimental measurements. Subsequently a parametric study is performed. The results show that rock joints with the same roughness can exhibit a range of closure behavior depending upon initial overlap and rock intrinsic friction. Therefore, unique descriptions of rock-joint closure behavior are elusive. Finally, the model-predicted nonlinear normal and shear stiffness are used to investigate the reflection and transmission of plane waves at rock joints. © 2011 American Society of Civil Engineers.
ISSN: 15323641
DOI: 10.1061/(ASCE)GM.1943-5622.0000021
Type: Article
Appears in Collections:Άρθρα/Articles

Show full item record

Citations 50

checked on Aug 17, 2019


checked on Aug 19, 2019

Page view(s)

Last Week
Last month
checked on Aug 25, 2019

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.