Verification of composite behavior of a precast decked simple span.

Auteur(s)
Osegueda, R.A. Noel, J.S. & Panak, J.J.
Jaar
Samenvatting

This paper documents the reconstruction of a simple span bridge redecked with full-depth, full-width precast concrete panels connected to act in a composite way with supporting stringers. It also reports the results of full-scale load tests and of an analysis conducted to evaluate the composite behaviour of the precast decked span. Eight precast concrete panels, each 6 ft 3 in. x 45 ft x 8 in. thick, were used to form the deck. The panels were cast with holes and positioned on top of supporting stringers with bearing pads measuring 2 in. x 6 in. x 1 in. thick. Steel stud connectors were welded to the top flanges through the holes. Keyways between adjacent panels and deck-stringer gaps were sealed to retain epoxy mortar that was poured through the deck openings. The panels were placed in an operation lasting about 5 hours. Welding the studs, sealing the connections, and pouring the epoxy mortar took about 20 hours. Full-scale load tests were conducted on the redecked span by placing a 13-ton vehicle at different locations while live-load deflections were recorded. A full-composite, finite element model of the bridge was used to correlate the measured deflections. The comparison of measured and full-composite deflections of the model indicates that the span behaves in a full-composite manner.

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Publicatie

Bibliotheeknummer
C 25857 (In: C 25850 S) IRRD 833999
Uitgave

In: Concrete bridge design and maintenance : steel corrosion in concrete, Transportation Research Record TRR 1211, p. 72-83, 13 ref.

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