Steel-Free Hybrid FRP Stiffened Panel-Concrete Deck System


  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Steel-Free Hybrid FRP Stiffened Panel-Concrete Deck System

Author(s): L. Cheng and V.M. Karbhari

Publication: Special Publication

Volume: 230


Appears on pages(s): 631-650

Keywords: analysis; bridge deck; characterization; fiber reinforcedpolymer (FRP); finite element (FE); steel-free

Date: 10/1/2005

This paper presents a design, analysis, and characterization of a hybriddeck system incorporating a thin Fiber Reinforced Polymer (FRP) stiffened hat-panelconfigured stay-in-place formwork that serves as flexural reinforcement with steel-freeconcrete poured on top. Quasi-static tests were conducted to first investigate theflexural behavior of the system. To understand the deck performance under trafficloads that induce repetitive stress cycles during the service life, a two-span continuousdeck specimen (1.22 m wide) was tested by subjecting it to a total of 2.36 million cyclesof load that simulates an AASHTO design truck with inclusion of the impact factor atboth low and high magnitudes. The concrete-panel interfacial response due to thepresence of sand and interlocking ribs was characterized by performing a series of 610mm wide deck section tests, the results of which were used to calibrate a finite-element (FE) based analytical model. The effect of the shear span-to-depth ratio,carbon fiber reinforcement ratio, and rib spacing were then evaluated by performing aparametric study using the calibrated nonlinear FE model. A simplified design approachis also proposed.