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Experimental investigation of wind effects on long-span slender bridges with stochastic traffic flow

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dc.contributor.authorNelson, Ryan Scott, author
dc.contributor.authorChen, Suren, 1973-, advisor
dc.contributor.authorBienkiewicz, Bogusz, committee member
dc.contributor.authorSakurai, Hiroshi, committee member
dc.coverage.spatialUnited States
dc.coverage.spatialSaint Charles Parish (La.)
dc.coverage.spatialTacoma Narrows Bridge (Tacoma, Wash. : 1950-)
dc.date.accessioned2007-01-03T05:16:13Z
dc.date.available2007-01-03T05:16:13Z
dc.date.issued2011
dc.description.abstractThe aeroelastic and aerodynamic effects on long-span slender bridges due to traffic has traditionally been neglected as it is assumed that the bridges will be closed to traffic under strong winds. However, with ever changing weather, natural disasters, and important roles of many long-span bridges throughout the United States, the reality is that these long-span bridges are often not closed and there are still many vehicles on the bridges even when considerably strong winds exist. Therefore, to rationally evaluate the aerodynamic performance of a bridge deck, the impacts from stochastic traffic should be appropriately considered as a key part toward any safety or serviceability study. The present study discusses the wind tunnel experimental tests of a long-span bridge section with stochastic traffic. The details of the experimental investigations are reported, including the design and construction of a bridge section model, two-degree-of-freedom testing frame and vehicle models representing stochastic traffic. Several tests were performed to determine a baseline for the bridge section without traffic, under different wind speeds and attack angles. The bridge section was then re-tested with many scenarios representing stochastic and extreme traffic conditions. The aeroelastic flutter derivative coefficients were extracted using the iterative mean square method and the values plotted and compared with the baseline results. Under the given reduced velocity range being tested, it is observed that several traffic scenarios increase the aeroelastic and aerodynamic effects as the bridge section becomes more susceptible to flutter and vortex shedding. Finally, the statistical descriptions of the flutter derivatives with the presence of traffic on the bridge section model are also made.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.identifierNelson_colostate_0053N_10267.pdf
dc.identifier.urihttp://hdl.handle.net/10217/47435
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2000-2019
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectaeroelastic
dc.subjectwind effects
dc.subjecttraffic
dc.subjectflutter derivatives
dc.subjectbridges
dc.titleExperimental investigation of wind effects on long-span slender bridges with stochastic traffic flow
dc.typeText
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplineCivil and Environmental Engineering
thesis.degree.grantorColorado State University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)

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