Construction and monitoring of a single-span bridge with precast concrete glass-fiberreinforced polymer reinforced deck panels

摘要

>The deck of the Beaver Creek Bridge in Utah was constructed in 2009 using 44 ft 5 in. × 6 ft 10 in. × 9 1/4 in. (13.4 m × 2.1 m × 0.23 m) precast concrete panels reinforced with glass-fiber-reinforced polymer (GFRP) bars. This paper presents monitoring data from two panels during lifting, transport, post-tensioning, and static load testing. The relative deflections between the bridge deck and the diaphragms were small, demonstrating that the connections between precast concrete deck panels and prestressed concrete girders provide good composite action. The live load deflections of the prestressed concrete girders during static load testing were smaller than the allowable deflection. The strains measured during lifting and in the load tests indicate that the ACI 440.1R-06) Guide for the Design and Construction of Structural Concrete Reinforced with FRP flexural design method for GFRP reinforced concrete decks can be applied to precast concrete panels, provided that lifting and handling stresses are properly designed.