Effective viscoelastic behaviour of rock mass with double-scale discontinuities
Effective viscoelastic behaviour of a rock mass with double-scale discontinuities is investigated. The rock mass is modelled as a system of microdefected rock traversed by macrojoints. The effect of microdefects on the dynamic behaviour is evaluated by a viscoelastic equivalent medium model implicit...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/100383 http://hdl.handle.net/10220/16279 |
| _version_ | 1824453810648514560 |
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| author | Fan, Lifeng Ma, Guowei Wong, Louis Ngai Yuen |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Fan, Lifeng Ma, Guowei Wong, Louis Ngai Yuen |
| author_sort | Fan, Lifeng |
| collection | NTU |
| description | Effective viscoelastic behaviour of a rock mass with double-scale discontinuities is investigated. The rock mass is modelled as a system of microdefected rock traversed by macrojoints. The effect of microdefects on the dynamic behaviour is evaluated by a viscoelastic equivalent medium model implicitly, whereas the macrojoints in the rock mass are modelled explicitly as physical discontinuities. Therefore, a homogenization–discontinuity combination approach is proposed to investigate the effective viscoelastic behaviour of rock mass under dynamic loading. The effective wave propagation coefficients and the effective viscoelastic complex moduli (storage modulus and loss modulus) are analytically derived. The effects of the double-scale discontinuities on the energy dissipation and the phase velocity are also discussed. It is shown that the effective behaviour of the rock mass with double-scale discontinuities is two-phase viscoelastic. Microdefect and macrojoint have different frequency-sensitive ranges and the effective viscoelastic behaviour is highly related to the stiffness of the discontinuities. |
| first_indexed | 2025-02-19T03:12:20Z |
| format | Journal Article |
| id | ntu-10356/100383 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:12:20Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/1003832020-03-07T11:45:53Z Effective viscoelastic behaviour of rock mass with double-scale discontinuities Fan, Lifeng Ma, Guowei Wong, Louis Ngai Yuen School of Civil and Environmental Engineering Effective viscoelastic behaviour of a rock mass with double-scale discontinuities is investigated. The rock mass is modelled as a system of microdefected rock traversed by macrojoints. The effect of microdefects on the dynamic behaviour is evaluated by a viscoelastic equivalent medium model implicitly, whereas the macrojoints in the rock mass are modelled explicitly as physical discontinuities. Therefore, a homogenization–discontinuity combination approach is proposed to investigate the effective viscoelastic behaviour of rock mass under dynamic loading. The effective wave propagation coefficients and the effective viscoelastic complex moduli (storage modulus and loss modulus) are analytically derived. The effects of the double-scale discontinuities on the energy dissipation and the phase velocity are also discussed. It is shown that the effective behaviour of the rock mass with double-scale discontinuities is two-phase viscoelastic. Microdefect and macrojoint have different frequency-sensitive ranges and the effective viscoelastic behaviour is highly related to the stiffness of the discontinuities. 2013-10-04T07:04:58Z 2019-12-06T20:21:28Z 2013-10-04T07:04:58Z 2019-12-06T20:21:28Z 2012 2012 Journal Article Fan, L., Ma, G., & Wong, L. N. Y. (2012). Effective viscoelastic behaviour of rock mass with double-scale discontinuities. Geophysical journal international, 191(1), 147-154. https://hdl.handle.net/10356/100383 http://hdl.handle.net/10220/16279 10.1111/j.1365-246X.2012.05573.x en Geophysical journal international |
| spellingShingle | Fan, Lifeng Ma, Guowei Wong, Louis Ngai Yuen Effective viscoelastic behaviour of rock mass with double-scale discontinuities |
| title | Effective viscoelastic behaviour of rock mass with double-scale discontinuities |
| title_full | Effective viscoelastic behaviour of rock mass with double-scale discontinuities |
| title_fullStr | Effective viscoelastic behaviour of rock mass with double-scale discontinuities |
| title_full_unstemmed | Effective viscoelastic behaviour of rock mass with double-scale discontinuities |
| title_short | Effective viscoelastic behaviour of rock mass with double-scale discontinuities |
| title_sort | effective viscoelastic behaviour of rock mass with double scale discontinuities |
| url | https://hdl.handle.net/10356/100383 http://hdl.handle.net/10220/16279 |
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