Experimental study of uplift loads due to tsunami bore impact on a wharf model

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dc.contributor.author Chen, C en
dc.contributor.author Melville, Bruce en
dc.contributor.author Nandasena, Napayalage en
dc.contributor.author Shamseldin, Asaad en
dc.contributor.author Wotherspoon, Liam en
dc.date.accessioned 2016-12-08T03:40:56Z en
dc.date.issued 2016-11 en
dc.identifier.citation Coastal Engineering 117:126-137 Nov 2016 en
dc.identifier.issn 0378-3839 en
dc.identifier.uri http://hdl.handle.net/2292/31277 en
dc.description.abstract Tsunamis are unpredictable disasters that have occurred frequently in recent years. An experimental study was conducted to quantify the tsunami bore uplift loads on a deck mounted on a slope, representing a typical wharf structure. Tsunami bores were generated as dam break waves in a flume, and the bore Froude number was approximately 1.6 on the dry bed. Fifty-five tests (11 bore cases, 5 runs each cases) were conducted for detailed measurements of bore height and bore velocity, and 504 tests (7 bore cases, 3 deck heights, 8 wharf slope angles, 3 runs each combination) were conducted for measurements of time-histories of pressure on the soffit of the deck. The effects of bore height, deck height and slope angle on uplift loads were studied. Results show that bore height correlates with bore velocity. The flow motion of the tsunami bore impacting the deck is divided into five stages: front-climbing, front-hitting, run-up, quasi-steady, and recession. The uplift pressure decreases from the deck-slope connection to the deck front edge, and the total uplift load increases with increasing bore height or decreasing deck height. For the front-hitting stage (the maximum pressure), the uplift load increases as the wharf slope angle decreases. However, for the quasi-steady stage (the longest time period), the uplift load is consistent for different wharf slope angles. Based on the experimental data, the equations for predicting the front-hitting and quasi-steady pressures are proposed as functions of bore height, deck height and wharf slope angle, and the predicted values are within ± 20% error. en
dc.publisher Elsevier en
dc.relation.ispartofseries Coastal Engineering en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Experimental study of uplift loads due to tsunami bore impact on a wharf model en
dc.type Journal Article en
dc.identifier.doi 10.1016/j.coastaleng.2016.08.001 en
pubs.begin-page 126 en
pubs.volume 117 en
dc.rights.holder Copyright: Elsevier en
pubs.end-page 137 en
pubs.publication-status Published en
dc.rights.accessrights http://purl.org/eprint/accessRights/RestrictedAccess en
pubs.subtype Article en
pubs.elements-id 540906 en
pubs.org-id Engineering en
pubs.org-id Civil and Environmental Eng en
dc.identifier.eissn 1872-7379 en
pubs.record-created-at-source-date 2016-12-08 en

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