Steady and unsteady pressure scour under bridges at clear-water conditions

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dc.contributor.authorKumcu, Serife Yurdagul
dc.date.accessioned2024-02-23T14:26:13Z
dc.date.available2024-02-23T14:26:13Z
dc.date.issued2016
dc.departmentNEÜen_US
dc.description.abstractBridges are vital components of the transportation network and if they are damaged or destroyed during a flood, they isolate communities and limit movement of supplies and emergency services. Evaluating their constructional stability and structural response after a flood event is critical for bridge safety. Bridge studies are usually designed with an assumption of an open channel flow condition, but the flow regime can switch to pressure flow if the downstream edge of a bridge deck is partially or totally submerged during a large flood. The main goal of this paper is to study the pressurized flow scour under a bridge deck and downstream deposition that results from eroded sediment material governed by both steady and unsteady clear-water flow conditions. Experimental conditions used in this study involve clear-water scour of a sand bed of given median sediment size d(50) = 0.90 mm and sediment uniformity sigma(g) = 1.29, an approach flow characterized by a flow depth and velocity, a rectangular-shaped bridge deck, and a stepwise flood hydrograph defined by its time to peak and peak discharge. Different flow conditions were considered in confined flow under the bridge deck. Relationship between pressure-flow scour and flow conditions is presented and discussed under the obtained experimental data. Additionally, effects of single-peaked stepwise flow hydrographs (unsteady flow conditions) on bridge pier scour depth are investigated under clear-water pressure-flow conditions, whereas previous researches mainly focused on the equilibrium pressure scour under steady flow conditions.en_US
dc.identifier.doi10.1139/cjce-2015-0385
dc.identifier.endpage342en_US
dc.identifier.issn0315-1468
dc.identifier.issn1208-6029
dc.identifier.issue4en_US
dc.identifier.scopus2-s2.0-84962683251en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage334en_US
dc.identifier.urihttps://doi.org/10.1139/cjce-2015-0385
dc.identifier.urihttps://hdl.handle.net/20.500.12452/14114
dc.identifier.volume43en_US
dc.identifier.wosWOS:000375943800007en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherCanadian Science Publishing, Nrc Research Pressen_US
dc.relation.ispartofCanadian Journal Of Civil Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectPressured Scouren_US
dc.subjectClear-Water Flowen_US
dc.subjectUnsteady Flowen_US
dc.subjectTemporal Developmenten_US
dc.subjectSediment Transporten_US
dc.titleSteady and unsteady pressure scour under bridges at clear-water conditionsen_US
dc.typeArticleen_US

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