Transmission of elastic waves through a frictional boundary

Sebastian, Resmi and Sitharam, TG (2014) Transmission of elastic waves through a frictional boundary. In: INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, 66 . pp. 84-90.

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Abstract

Incident energy gets transmitted, reflected and absorbed across an interface in jointed rock mass leading to energy dissipation and alteration of waves. Wave velocities get attenuated during their propagation across joints and this behavior is studied using bender/extender element tests. The velocity attenuation and modulus reduction observed in experimental tests are modeled with three dimensional distinct element code and results are validated. Normal propagation of an incident shear wave through a jointed rock mass cause slip of the rock blocks if shear stress of wave exceeds the shear strength of the joint. As the properties of joint determine the transmission of energy across an interface, a parametric study is then conducted with the validated numerical model by varying the parameters that may determine the energy transmission across a joint using modified Miller's method. Results of the parametric study are analyzed and presented in the paper. (C) 2014 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copyright for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, ENGLAND
Keywords:	Wave propagation; Shear waves; Joints; Bender/extender elements; Numerical models
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	13 May 2014 11:36
Last Modified:	13 May 2014 11:36
URI:	http://eprints.iisc.ac.in/id/eprint/48993

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