Sensitivity of seismic demands and fragility estimates of a typical California highway bridge to uncertainties in its soil-structure interaction modeling

Simple item page
dc.citation.firstpage605en_US
dc.citation.journalTitleEngineering Structuresen_US
dc.citation.lastpage617en_US
dc.citation.volumeNumber189en_US
dc.contributor.authorXie, Yazhouen_US
dc.contributor.authorDesRoches, Reginalden_US
dc.date.accessioned2019-08-16T17:27:29Zen_US
dc.date.available2019-08-16T17:27:29Zen_US
dc.date.issued2019en_US
dc.description.abstractThis study investigates the sensitivity of seismic demands and fragility estimates of a typical highway bridge in California to variation in its soil-structure interaction (SSI) modeling parameters. A rigorous p-y spring based modeling approach is developed and validated for an instrumented highway overcrossing that provides a dependable screening of each modeling parameter. Modifications are made to benchmark the overcrossing against typical bridge designs in California, including the consideration of diaphragm and seat abutments. Plausible variation in SSI modeling parameters is established using 18 random variables that cover different soil zones. Influential SSI parameters are identified for the seismic demands of bridge components through two regression techniques such as stepwise and LASSO regressions. Concurring results from both regressions indicate that bridge demand models tend to be sensitive to the modeling parameters associated with near-ground soils. Furthermore, the relative importance of the uncertainty in SSI modeling parameters is assessed with respect to the fragility estimates in both component and system levels. The study reveals that the bridge performance and fragility curves of bridge columns and decks are dominated by the uncertainty in the ground motion. However, the propagation of the potentially variable SSI parameters plays a significant role in the fragility estimates of bridge foundations and abutment components such as span unseating, bearings and shear keys. The results offer insights to guide future uncertainty treatment in SSI modeling and investment in refined soil parameter estimates through field testing or other measures.en_US
dc.identifier.citationXie, Yazhou and DesRoches, Reginald. "Sensitivity of seismic demands and fragility estimates of a typical California highway bridge to uncertainties in its soil-structure interaction modeling." <i>Engineering Structures,</i> 189, (2019) Elsevier: 605-617. https://doi.org/10.1016/j.engstruct.2019.03.115.en_US
dc.identifier.doihttps://doi.org/10.1016/j.engstruct.2019.03.115en_US
dc.identifier.urihttps://hdl.handle.net/1911/106266en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Elsevier.en_US
dc.subject.keywordHighway bridgesen_US
dc.subject.keywordSoil-structure interactionen_US
dc.subject.keywordp-y springen_US
dc.subject.keywordSeismic demandsen_US
dc.subject.keywordFragility curvesen_US
dc.subject.keywordSoil uncertaintyen_US
dc.subject.keywordStepwise regressionen_US
dc.subject.keywordLasso regressionen_US
dc.titleSensitivity of seismic demands and fragility estimates of a typical California highway bridge to uncertainties in its soil-structure interaction modelingen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
soil-modeling-sensitivity_accepted.pdf
Size:
1.55 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Faculty Publications
Civil and Environmental Engineering Publications