Precast Concrete Deck-to-Girder Connection using UHPC

Project Details
STATE

NE

SOURCE

TRID

START DATE

07/01/18

END DATE

12/31/19

RESEARCHERS

G Morcous

SPONSORS

Nebraska DOT, FHWA

KEYWORDS

Bridge decks, Girders, Panels, Precast concrete, Shear reinforcement, Structural analysis, Structural connection, Ultra high performance concrete

Project description

The method used in Nebraska for connecting precast concrete deck panels to concrete girders to create composite section is extending shear connectors (i.e., threaded rods) from the concrete girder into HSS-formed shear pockets in the deck panels, and then filling the pockets and haunch area using self-consolidating concrete (SCC). This method requires high level of quality control/quality assurance (QA/QC) in spacing the shear connectors during girder fabrication as well as shear pockets during panel fabrication to avoid any conflict between them during erection. It also requires shear connectors to achieve minimum embedment in the shear pockets to develop the design capacity, which necessitates adjusting connector’s height to compensate for girder camber.
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