Please use this identifier to cite or link to this item: https://ktisis.cut.ac.cy/handle/10488/14376
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.
URI: https://ktisis.cut.ac.cy/handle/10488/14376
ISSN: 15323641
DOI: 10.1061/(ASCE)GM.1943-5622.0000021
Type: Article
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