PCI Journal · 1996 · 58 citations · 4 references
EngineeringCivil EngineeringDesignBridge EngineeringStructural AnalysisStructural EngineeringBridge ConstructionBridge DesignPrestressed ConcreteReinforced Concrete StructuresStructural DesignStructural SystemsConcrete Bridge DesignPost-tensioning DetailingPrecast Bridge DesignPrecast Prestressed ConcretePrestressed Concrete Bridge DecksPrestressed Concrete BridgesPrestressed Concrete GirdersTransverse Post-tensioning
American and Japanese design and detailing practices of prestressed concrete box girder bridges are compared. A new precast, prestressed box girder design suitable for U.S. practice is proposed. The design is based on requiring the deck to act as a rigid assembly of longitudinal and transverse members. This is consistent with Japanese practice and fulfills the intent of several state DOT initiatives. The proposal advocates quarter-point diaphragms with relatively large amounts of transverse post-tensioning. A design chart and recommended details are provided for bridges up to 80 ft (24 m) long. The amount of post-tensioning was found to be unaffected by bridge span length. A fully worked numerical design example is included to demonstrate the proposed design procedure.
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