Reliability of AASHTO LRFD parameters in multilane reinforced concrete slab bridges

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dc.contributor.authorMahmood, Ali
dc.contributor.authorNajjar, Shadi S.
dc.contributor.authorMabsout, Mounir
dc.contributor.authorTarhini, Kassim M.
dc.contributor.departmentDepartment of Civil and Environmental Engineering
dc.contributor.facultyMaroun Semaan Faculty of Engineering and Architecture (MSFEA)
dc.contributor.institutionAmerican University of Beirut
dc.date.accessioned2025-01-24T11:27:33Z
dc.date.available2025-01-24T11:27:33Z
dc.date.issued2019
dc.description.abstractEmpirical expressions for estimating live load bending moments are typically specified in AASHTO bridge codes. This paper will evaluate the reliability levels that are inherent in the simplified empirical equations in the AASHTO LRFD to design concrete slab bridges. Typical one-span, multilane, straight bridges, with various span lengths are modeled using finite element analysis (FEA) and subjected to AASHTO live loads. FEA results are compared with LRFD moments to quantify biases that might result from the simplifying assumptions in AASHTO. The reliability index β for bridge cases using AASHTO procedures and FEA results were quantified. The results of this analysis showed that current live load factors in AASHTO LRFD procedures were below the required levels of reliability index (β <3.5) for one-lane bridges, and those indices were higher for multilane bridges, yet did not reach the required level, thus proposing to increase the AASHTO live load factors. © 2019 - IOS Press and the authors. All rights reserved.
dc.identifier.doihttps://doi.org/10.3233/BRS-190156
dc.identifier.eid2-s2.0-85071683362
dc.identifier.urihttp://hdl.handle.net/10938/26904
dc.language.isoen
dc.publisherIOS Press
dc.relation.ispartofBridge Structures
dc.sourceScopus
dc.subjectConcrete slab bridges
dc.subjectFinite-element analysis
dc.subjectLoad-carrying capacity
dc.subjectReliability analysis
dc.subjectComposite bridges
dc.subjectConcrete slabs
dc.subjectFinite element method
dc.subjectLoad limits
dc.subjectReinforced concrete
dc.subjectStructural dynamics
dc.subjectAashto-lrfd
dc.subjectEmpirical equations
dc.subjectEmpirical expression
dc.subjectReliability index
dc.subjectReliability level
dc.subjectSimplifying assumptions
dc.subjectSpan length
dc.titleReliability of AASHTO LRFD parameters in multilane reinforced concrete slab bridges
dc.typeArticle

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