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Numerical Simulation of Direct Shear Test on Rock Joint
The shear behaviour of rock joint is a combination of complex phenomena which include normal dilation, asperity shearing or sliding, contact area undergoing shearing or sliding and stiffness of the surrounding rock mass. Hence, a model for joint behaviour has to consider a large number of assumptions and uncertainties. The experimental studies on the modeled rock joint with different asperity shows a significant effect of the asperity, shearing rate and boundary conditions on the shear behaviour of the rock joints. The experimental study is very exhaustive and requires very good testing facility for correct evaluation of the shear strength. Hence, in the present work capability of UDEC (Itasca, 2004) in predicting the shear behaviour of the rock joints with different asperities under constant normal load (CNL) and constant normal stiffness (CNS) boundary conditions is evaluated. The predicted shear behaviour is compared with the experimental results (Shrivastava and Rao, 2010 and 2011) and it is observed that the predicted peak shear stress based on UDEC is in close agreement with the experimental results.
Numerical Simulation of Direct Shear Test on Rock Joint
The shear behaviour of rock joint is a combination of complex phenomena which include normal dilation, asperity shearing or sliding, contact area undergoing shearing or sliding and stiffness of the surrounding rock mass. Hence, a model for joint behaviour has to consider a large number of assumptions and uncertainties. The experimental studies on the modeled rock joint with different asperity shows a significant effect of the asperity, shearing rate and boundary conditions on the shear behaviour of the rock joints. The experimental study is very exhaustive and requires very good testing facility for correct evaluation of the shear strength. Hence, in the present work capability of UDEC (Itasca, 2004) in predicting the shear behaviour of the rock joints with different asperities under constant normal load (CNL) and constant normal stiffness (CNS) boundary conditions is evaluated. The predicted shear behaviour is compared with the experimental results (Shrivastava and Rao, 2010 and 2011) and it is observed that the predicted peak shear stress based on UDEC is in close agreement with the experimental results.
Numerical Simulation of Direct Shear Test on Rock Joint
Shrivastava, A.K. (author) / Rao, K.S. (author) / Rathod, Ganesh W. (author)
GeoCongress 2012 ; 2012 ; Oakland, California, United States
GeoCongress 2012 ; 2177-2186
2012-03-29
Conference paper
Electronic Resource
English
Numerical Simulation of Direct Shear Test on Rock Joint
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