Repair of Impact-Damaged Prestressed Bridge Girders Using Strand Splices and Fabric Reinforced Cementitious Matrix

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dc.contributor.authorJones, Mark Stevensen
dc.contributor.committeechairRoberts-Wollmann, Carin L.en
dc.contributor.committeechairCousins, Thomas E.en
dc.contributor.committeememberKoutromanos, Ioannisen
dc.contributor.departmentCivil and Environmental Engineeringen
dc.date.accessioned2017-03-14T08:00:24Zen
dc.date.available2017-03-14T08:00:24Zen
dc.date.issued2017-03-13en
dc.description.abstractThis thesis investigates the repair of impact-damaged prestressed concrete bridge girders with strand splices and fabric-reinforced cementitious matrix systems, specifically for repair of structural damage to the underside of an overpass bridge girder due to an overheight vehicle collision. Collision damage to bridges can range from minor to catastrophic, potentially requiring repair or replacement of a bridge girder. This thesis investigates the performance of two different types of repair methods for flexural applications: strand splice repair, which is a traditional repair method that is often utilized, and fabric-reinforced cementitious matrix repair, which is a relatively new repair method. The overarching goal of this project was to provide guidance for assessment and potential repair of impact-damaged girders. Prestressed concrete girders were tested to failure in flexure in this research. After a control test to establish a baseline for comparison, five tests were performed involving damaging a girder, repairing it using one of the repair methods, and testing it to failure. These tests showed that both strand splice repairs and fabric-reinforced cementitious matrix repairs can adequately restore the strength of an impact-damaged girder when up to 10% of the prestressing strands are severed. Combined repairs can also be a viable option if more than 10% of the prestressing strands are severed, though as the damage gets more severe, girder replacement becomes a more attractive option.en
dc.description.abstractgeneralThis thesis investigates the structural repair of impact-damaged prestressed concrete bridge girders. Impact damage to these structural elements is most commonly an overheight vehicle colliding with the underside of an overpass bridge girder on a roadway. Damage to the structure can range from minor to catastrophic. Though more destructive impacts require replacement of the girder or entire bridge structure, repair of the damaged girder is possible in some cases. This thesis studies two different methods of repair of these impact-damaged girders: strand splices and fabric-reinforced cementitious matrix. Full-scale prestressed concrete girders were tested to failure in this research. A total of five tests were performed involving damaging a girder, repairing it using one of the repair methods, and testing it to failure. These tests showed that both repair methods can adequately restore the strength of an impact-damaged girder for minor to moderate structural damage. The overarching goal of this project was to provide guidance for assessment and potential repair of impact-damaged girders.en
dc.description.degreeMaster of Scienceen
dc.format.mediumETDen
dc.identifier.othervt_gsexam:6004en
dc.identifier.urihttp://hdl.handle.net/10919/76648en
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectBridgeen
dc.subjectRepairen
dc.subjectFRPen
dc.subjectFRCMen
dc.subjectStrand Spliceen
dc.titleRepair of Impact-Damaged Prestressed Bridge Girders Using Strand Splices and Fabric Reinforced Cementitious Matrixen
dc.typeThesisen
thesis.degree.disciplineCivil Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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