Continuity diaphragm for skewed continuous span precast prestressed concrete girder bridges : technical summary report.

Technical summary report.PDFTech ReportTechnical summary report 383Skew bridgesSkewed structuresPrecast concretePrestressed concreteGirdersVertical supportsLong span bridgesConcrete bridgesPrestressed concrete bridgesBridgesLouisianaLouisiana Transportation Research CenterSaber, AzizLouisiana Tech University. Dept. of Civil EngineeringLouisiana Transportation Research CenterLouisiana. Dept. of Transportation and DevelopmentNTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and StructuresNTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsNTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and PerformanceNTL-HIGHWAY/ROAD TRANSPORTATION-DesignNTL-HIGHWAY/ROAD TRANSPORTATION-Construction and MaintenanceUS Transportation CollectionMost highway bridges are built as cast-in-placereinforced concrete slabs and prestressed concretegirders. The shear connectors on the top of the girdersassure composite action between the slabs andgirders. The design guidelines for bridges inAASHTO Section 8.12 indicate that diaphragmsshould be installed for T-girder spans and may beomitted where structural analysis shows adequatestrength. Furthermore, the effects of diaphragms arenot accounted for in proportioning the girders.Therefore, the use of diaphragms should be investigated