Holmes, HT, Paraskevopoulou, C, Hildyard, M et al. (2 more authors) (2023) Equivalent material modelling of fractured rock mass resonance effects. In: Anagnostou, G., Benardos, A. and Marinos, V.P., (eds.) Expanding Underground - Knowledge and Passion to Make a Positive Impact on the World. ITA-AITES World Tunnel Congress 2023 (WTC 2023), 12-18 May 2023, Athens, Greece. CRC Press , London , pp. 268-276. ISBN 9781003348030
Abstract
Resonance effects in parallel fractured rock masses are investigated using equivalent material models. The mechanisms of spring resonance and superposition resonance are considered. Both of these resonance mechanisms give rise to resonant frequencies, which represent bands of high transmission. Three different representations of a fractured rock mass are adopted: discrete fractures using special elements in the finite difference mesh; a homogenous equivalent medium representing the weakening to the material caused by the fractures; and a localised equivalent medium applied in the vicinity of fractures. The models are excited by a wide-band source, the response measured and a transfer function generated from the results. Results are compared to the prediction of spring and superposition resonant frequencies calculated using analytical equations. It is found that the discrete and localised equivalent materials give similar results, which match the predictions from the analytical equations for both resonance mechanisms, while the equivalent homogenous medium does not show any resonance effects. Showing that this effect occurs in the appropriate equivalent material model helps future prediction of ground borne vibrations from underground sources, such as railway tunnels, as it gives a greater scope of models which can accurately model the propagation of stress waves through fractured rock masses.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | © 2023 The Author(s). Open Access: www.taylorfrancis.com, CC BY-NC-ND 4.0 license |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Dec 2023 15:38 |
Last Modified: | 21 Dec 2023 15:38 |
Published Version: | https://doi.org/10.1201/9781003348030 |
Status: | Published |
Publisher: | CRC Press |
Identification Number: | 10.1201/9781003348030-33 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:200049 |
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