Article

Processing and performance of bridge deck subcomponents using two schemes of resin infusion

Department of Structural Engineering, MC-0085, University of California, San Diego, La Jolla, CA 92093-0085, USA
Composite Structures 01/2001; DOI: 10.1016/S0263-8223(00)00136-7

ABSTRACT Due to their lightweight, ease of installation in the field, and potential life-cycle durability, fiber reinforced composites are increasingly being considered in applications such as replacement bridge decks. However, current costs associated with the fabrication of such decks are 4–5 times that of conventional reinforced concrete decks thus placing great importance on the development of cost-effective processes such as resin infusion. This paper describes results of a test program aimed at the assessment of two different resin infusion schemes for the fabrication of foam core filled truss-type bridge decks. Model flow studies and simple analytical procedures are used to assess flow phenomena. The results of process and performance comparisons show that although the use of a microgroove network can be more efficient than the use of a high-permeable medium, in terms of rate of infusion, and global structural performance may be comparable, there is a greater likelihood of defect formation. Process induced defect formation is different in the two schemes with the former having a higher susceptibility for localized effects. Defect types are identified, and comparisons of performance are made at both a local and global level.

0 Bookmarks
 · 
52 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: As part of developing an all natural composite roof for housing application, structural panels and unit beams were manufactured out of soybean oil based resin and natural fibers (flax, cellulose, pulp, recycled paper, chicken feathers) using vacuum assisted resin transfer molding (VARTM) technology. Physical and chemical investigations and mechanical testing of the beams yielded good results in line with desired structural performance. Room temperature curing of an acrylated epoxidized soybean oil (AESO) resin gave a flexural modulus of 1 GPa. Natural fiber reinforcement of 20–55 wt.% fiber increased the flexural modulus to 2–6 GPa. The same resin reinforced with woven E-glass gave a flexural modulus of 17 GPa. Using this type of composite in building construction introduces many advantages such as high strength and stiffness to weight, survivability in severe weather conditions, desired ductility, fatigue resistance, and design flexibility (three-dimensional forms, molded in place, easy to install and structure replacement). A bio-based (natural and biodegradable) matrix reinforced by natural fibers also provides an important environmental advantage, as renewable resources are used instead of petroleum-based materials. Five different structural beams were successfully manufactured and mechanically tested giving good results. Combinations of two different fibers were also introduced to give processing and strength advantages.
    Composite Structures 01/2004; 63(2):147-157. · 3.12 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: A systematic testing program was conducted to investigate the failure modes and failure mechanisms of multi-cellular FRP composite bridge decks. To compare loading patch effects on deck local failure, a steel patch made according to AASHTO specifications and a special rubber-stuffed truck tire patch were used in lab testing. The testing results showed that the failure of FRP deck using steel patch was local punching and shear cracking; while the deck failure using tire patch was local bending failure. Deck-loading patch contacting analyses were also conducted using Finite Element Method. This research showed that the failure modes of the investigated multi-cellular FRP deck systems were related to the stiffness and deformability of the loading patches.
    01/2002;
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The consideration of glass fibre reinforced polymer (GFRP) bridge decks as a replacement for conventional reinforced concrete bridge decks is on the rise. This is because FRP bridge decks are easier to install, lightweight, durable and non -corrosive. Development of an optimal design will ultimately address the high cost that is associated with the FRP materials and fabrication. This paper is an overview of an experimental program that deals with the development of GFRP bridge deck modules. Two separate full -scale decks were tested under a simulated AASHTO HS30 design truckload. Both static and cyclic loading tests were performed.