Investigation of a Structural FRP Stay-in-Place Form for a Prototype Military Bridge System

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Title: Investigation of a Structural FRP Stay-in-Place Form for a Prototype Military Bridge System

Author(s): J.P. Hanus, L.C. Bank, and M.G. Oliva

Publication: Special Publication

Volume: 257

Issue:

Appears on pages(s): 53-70

Keywords: bridge decks; combined loading; fiber reinforced polymer (FRP); flexural; flexural-shear; stay-in-place form

Date: 10/1/2008

Abstract:
An investigation of a structural fiber-reinforced polymer (FRP) stay-in-place (SIP) form used to construct and reinforce a deck for a prototype military bridge system is discussed. The FRP SIP form is supported by a deployable truss and the bridge is completed with a cast-in-place deck. A unique feature is that the fiber-reinforced concrete deck also acts as the upper chord of a truss for the bridge-subjecting it to combined bending and longitudinal axial load. An experimental program investigated the behavior and capacity of the fiber-reinforced concrete deck. Specimens spanning 1.83 m (6.00 ft) with simple supports and 3.66 m (12.0 ft) with an intermediate support were tested. The results were statistically analyzed and compared to the ACI 440.1R design guide. The results showed that flexural and flexural-shear capacities were accurately predicted, provided that the eccentricity, due to the combined loads, was accounted for in the calculations.