An Analytical Study of FRP-Concrete Bridge Superstructures

It is a major challenge to build a bridge superstructure that has long-term durability and low maintenance requirements. A solution to this challenge may be to use new materials or to implement new structural systems. Fiber Reinforced Polymer (FRP) composites have continued to play an important role in solving some of persistent problems in infrastructure applications because of its high specific strength, light weight, and durability. In this study, the concept of the hybrid FRP-concrete structural systems is applied to a bridge superstructure. The hybrid FRP-concrete bridge superstructure is intended to have durable, structurally sound, and cost effective hybrid system that will take full advantage of the inherent properties of both FRP materials and concrete. In this study, two hybrid FRP-concrete bridge systems were investigated. The first system consists of trapezoidal cell units forming a bridge superstructure. The second one is formed by arch cells. The two systems rely on using cellular components to form the core of the bridge superstructure, and an outer shell to warp around those cells to form the integral unit of the bridge. Both systems were investigated analytically by using finite element (FE) analysis. From the rigorous FE studies, it was concluded that first system is more efficient than the second.

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References:
[1] Hillman, J. R. and Murray, T. M. (1990), “Innovative Floor Systems for
Steel Framed Buildings,” Mixed Structures, Including New Materials,
Proceedings of IABSE Symposium, Brussels, Belgium, Vol. 60, IABSE,
Zurich, pp. 672-675.
[2] Bakeri, P. A. and Sunder, S. S. (1990), “Concepts for Hybrid FRP
Bridge Deck Systems,” Serviceability and Durability of Construction
Materials, Proceedings of the First Materials Engineering Congress,
Denver, Colorado, August 13-15, 1990, ASCE, Vol. 2, pp. 1006-1015.
[3] Saiidi, M., Gordaninejad, F., and Wehbe, N. (1994), “Behavior of
Graphite/Epoxy Concrete Composite Beams”, Journal of Structural
Engineering, Vol. 120, No. 10, pp. 2958-2976.
[4] Deskovic, N., Triantafillou, T. C., and Meier, U. (1995), “Innovative
Design of FRP Combined with Concrete: Short-Term Behavior”, Journal
of Structural Engineering, Vol. 121, No. 7, pp. 1069-1078.
[5] Van Erp, G. (2002a), “Road Bridge Benefits from Hybrid Beams”,
Reinforced Plastics, Vol. 46, No. 6, Elsevier Science Ltd., Oxford, UK.
[6] Alnahhal, W., and Aref, A.J (2008), “Structural performance of hybrid
fiber reinforced polymer-concrete bridge superstructure systems”,
Journal of Composite Structures, v 84, n 4, pp 319-336.
[7] Ashby, M. F. (1991), “Overview No.92 – Materials and Shape”, Acta
Metallurgica et Materialia, Vol. 39, No. 6, pp. 1025-1039.
[8] Kitane, Y. and Aref, A. (2004), “Static and fatigue testing of hybrid
fiber-reinforced polymer-concrete bridge superstructure”, Journal of
Composites for Construction, Vol. 8, No. 2, pp. 182-190.
[9] Aref, A. J., and Parsons, I. D. (1999), “Design Optimization Procedures
for Fiber Reinforced Plastic Bridges”, Journal of Engineering
Mechanics, Vol. 125, No. 9, pp. 1040-1047.
[10] American Association of State Highway and Transportation Officials,
(2007), AASHTO LRFD Bridge Design Specifications, Second Edition,
AASHTO, Washington, D.C.
[11] 3DS Dassault Systems, Inc. (2014), ABAQUS/Standard User’s Manual,
Version 6.14, 3DS Dassault Systems, Inc.
[12] Jones, R. M. (1999), Mechanics of Composite Materials, 2nd Edition,
Taylor & Francis Inc., Philadelphia, PA.
[13] Aref, A. J. (1997), A Novel Fiber Reinforced Composite Bridge
Structural system, Ph.D. Dissertation, the University of Illinois at
Urbana-Champaign.