Numerical Simulation of Wave Propagation Across Multiple Parallel Rock Joints Using DEM

Sebastian, R and Sitharam, TG (2020) Numerical Simulation of Wave Propagation Across Multiple Parallel Rock Joints Using DEM. In: Lecture Notes in Civil Engineering, 13-15 December 2018, Bengaluru; India, pp. 825-837.

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Abstract

The propagation of waves across parallel joints in rock mass involves multiple reflections of waves between joints. Propagation of waves across multiple parallel joints is numerically modeled and presented in this paper using distinct element simulations. The validation of numerical model was performed by comparing wave velocities obtained in laboratory and numerical simulations. For the study on wave propagation across parallel joints, DEM numerical models with varying number of joints were generated. The wave velocities, wave amplitudes and energy flux of waves were monitored. It has been found that as the number of joints in rock mass increases, there is a transition from intermediate wavelength condition to long wavelength condition. The stress waves monitored indicated that there are considerable reflections of waves between joints and waves propagating under intermediate wavelength condition sense the presence of joints. Due to the superposition of waves between joints, the waves may get amplified also. © 2020, Springer Nature Singapore Pte Ltd.

Item Type:	Conference Paper
Publication:	Lecture Notes in Civil Engineering
Publisher:	Springer Science and Business Media Deutschland GmbH
Additional Information:	cited By 0; Conference of Indian Geotechnical Conference ,IGC 2018 ; Conference Date: 13 December 2018 Through 15 December 2018; Conference Code:250609
Keywords:	Numerical models; Rock mechanics; Wave propagation, Distinct elements; Energy fluxes; Long wavelength; Multiple reflections; Propagation of waves; Validation of numerical model; Wave amplitudes; Wave velocity, Rocks
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	21 Dec 2020 10:07
Last Modified:	21 Dec 2020 10:07
URI:	http://eprints.iisc.ac.in/id/eprint/67218

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