Influence of stiffness of railings on one-span multi-lane steel girder bridges -

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dc.contributor.authorNasr Eddine, Wassim Hasan
dc.contributor.departmentDepartment of Civil and Environmental Engineering
dc.contributor.facultyFaculty of Engineering and Architecture
dc.contributor.institutionAmerican University of Beirut
dc.date2015
dc.date.accessioned2017-08-30T14:12:26Z
dc.date.available2017-08-30T14:12:26Z
dc.date.issued2015
dc.date.submitted2015
dc.descriptionThesis. M.E. American University of Beirut. Department of Civil and Environmental Engineering, 2015. ET:6313
dc.descriptionAdvisor : Dr. Mounir Mabsout, Professor, Civil and Environmental Engineering ; Committee Members : Dr. Salah Sadek, Professor, Civil and Environmental Engineering ; Dr. George Saad, Assistant Professor, Civil and Environmental Engineering.
dc.descriptionIncludes bibliographical references (leaves 204-205)
dc.description.abstractThe conventional analysis and design of highway bridges ignore the contribution of railings in a bridge deck when calculating the flexural strength of superstructures. In fact, the presence of railings acting integrally with the bridge deck has the effect of stiffening and therefore altering the lateral wheel load distribution on highway bridges . The current research presents a parametric study to investigate the influence of stiffness of railings on load distribution and load-carrying capacity of multi-span multi-lane steel girder bridges. The finite-element method is used to investigate the effect of span length, slab width, girder spacing on one-span simply supported, two-lane, three-lane, and four-lane steel girder bridges. The finite element program SAP2000 (2013) is selected for the analysis. American Association of State Highway and Transportation Officials (AASHTO) HS20 design trucks were positioned on the bridges to produce the maximum moments. Various stiffnesses of railings on either or both edges of the slab are considered. Bridges without railings served as reference cases. The wheel load distribution factor for the reference cases and for cases with railings are calculated and compared. The finite-element analysis results were also compared with AASHTO procedures. The AASHTO load and resistance factor design (LRFD) wheel load distribution formula correlated conservatively with the finite-element results and all were less than the typical AASHTO Standard formula (S-5.5). Increasing the stiffness of railings has shown to increase the load-carrying capacity when included in the strength evaluation of highway bridges. The research will therefore assist structural engineers in better designing new steel girder bridges, or evaluating more precisely the load-carrying capacity of existing bridges, in the presence of railings. Such can also be considered as an adequate and practical method for strengthening and rehabilitating steel girder bridges.
dc.format.extent1 online resource (xviii, 205 leaves) : illustrations ; 30 cm
dc.identifier.otherb18380918
dc.identifier.urihttp://hdl.handle.net/10938/10787
dc.language.isoen
dc.relation.ispartofTheses, Dissertations, and Projects
dc.subject.classificationET:006313
dc.subject.lcshAmerican Association of State Highway and Transportation Officials.
dc.subject.lcshSteel I-beams.
dc.subject.lcshBridge railings.
dc.subject.lcshGirders.
dc.subject.lcshFinite element method.
dc.subject.lcshStructural engineering.
dc.subject.lcshBridges.
dc.titleInfluence of stiffness of railings on one-span multi-lane steel girder bridges -
dc.typeThesis

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