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- Publisher Website: 10.1139/cgj-2014-0394
- Scopus: eid_2-s2.0-84952934507
- WOS: WOS:000370040200016
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Article: Discrete-element investigation of influence of granular debris flow baffles on rigid barrier impact
Title | Discrete-element investigation of influence of granular debris flow baffles on rigid barrier impact |
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Authors | |
Keywords | Granular debris flow Landslides Rigid barrier Baffles Discrete element method |
Issue Date | 2016 |
Citation | Canadian Geotechnical Journal, 2016, v. 53, n. 1, p. 179-185 How to Cite? |
Abstract | © 2015, National Research Council of Canada. All rights reserved. Granular debris flow baffles are commonly installed in front of rigid barriers to dissipate flow energy and reduce the required barrier impact capacity. Despite the engineering value of baffles, their influence on rigid barrier impact is still not well understood. A previously calibrated discrete element method (DEM) model using a series of flume experiments was adopted to study the effectiveness of installing baffles in front of a rigid barrier. Froude scaling was used to characterize the flow front. Different baffle configurations were examined, namely number of rows, spacing between successive rows (L), and baffle height. Results reveal an optimum row spacing of L/D = 3 (D is the slit size). Row spacing less than L/D = 3 leads to increased peak dynamic force from overflow impacting the barrier, whereas row spacing greater than L/D = 3 results in increased peak dynamic force from the granular debris flow front. Increasing spacing greater than L/D = 3 allows the dispersion of debris between rows and decreases the effectiveness of the second row. Adopting baffle heights greater than 1.5 times the approach flow depth (h) reveals little influence on the peak impact force induced on the barrier. |
Persistent Identifier | http://hdl.handle.net/10722/273673 |
ISSN | 2023 Impact Factor: 3.0 2023 SCImago Journal Rankings: 1.513 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Law, Raymond Pak Hei | - |
dc.contributor.author | Choi, Clarence Edward | - |
dc.contributor.author | Ng, Charles Wang Wai | - |
dc.date.accessioned | 2019-08-12T09:56:20Z | - |
dc.date.available | 2019-08-12T09:56:20Z | - |
dc.date.issued | 2016 | - |
dc.identifier.citation | Canadian Geotechnical Journal, 2016, v. 53, n. 1, p. 179-185 | - |
dc.identifier.issn | 0008-3674 | - |
dc.identifier.uri | http://hdl.handle.net/10722/273673 | - |
dc.description.abstract | © 2015, National Research Council of Canada. All rights reserved. Granular debris flow baffles are commonly installed in front of rigid barriers to dissipate flow energy and reduce the required barrier impact capacity. Despite the engineering value of baffles, their influence on rigid barrier impact is still not well understood. A previously calibrated discrete element method (DEM) model using a series of flume experiments was adopted to study the effectiveness of installing baffles in front of a rigid barrier. Froude scaling was used to characterize the flow front. Different baffle configurations were examined, namely number of rows, spacing between successive rows (L), and baffle height. Results reveal an optimum row spacing of L/D = 3 (D is the slit size). Row spacing less than L/D = 3 leads to increased peak dynamic force from overflow impacting the barrier, whereas row spacing greater than L/D = 3 results in increased peak dynamic force from the granular debris flow front. Increasing spacing greater than L/D = 3 allows the dispersion of debris between rows and decreases the effectiveness of the second row. Adopting baffle heights greater than 1.5 times the approach flow depth (h) reveals little influence on the peak impact force induced on the barrier. | - |
dc.language | eng | - |
dc.relation.ispartof | Canadian Geotechnical Journal | - |
dc.subject | Granular debris flow | - |
dc.subject | Landslides | - |
dc.subject | Rigid barrier | - |
dc.subject | Baffles | - |
dc.subject | Discrete element method | - |
dc.title | Discrete-element investigation of influence of granular debris flow baffles on rigid barrier impact | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1139/cgj-2014-0394 | - |
dc.identifier.scopus | eid_2-s2.0-84952934507 | - |
dc.identifier.volume | 53 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 179 | - |
dc.identifier.epage | 185 | - |
dc.identifier.eissn | 1208-6010 | - |
dc.identifier.isi | WOS:000370040200016 | - |
dc.identifier.issnl | 0008-3674 | - |