The use of sustainable materials for quick repair of aging bridges : phase II final report.
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The use of sustainable materials for quick repair of aging bridges : phase II final report.

Filetype[PDF-447.56 KB]


English
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  • Creators:
    Parvin, Azadeh
  • Corporate Creators:
    University of Toledo. University Transportation Center
  • Corporate Contributors:
    United States. Dept. of Transportation
  • Subject/TRT Terms:
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Ohio
  • Corporate Publisher:
    United States. Dept. of Transportation
  • Abstract:
    "During the last decade fiber reinforced polymer (FRP) materials have gained wide acceptance for repair and strengthening of existing infrastructures or to design new infrastructures due to their desirable properties (high strength to weight ratio, light weight and consequent ease of field placement, corrosion resistance, durability, and low maintenance cost among others). There is a need to strengthen the deficient and aging civil infrastructure or new structures that are identified with certain design flaws against sudden loads including impact, blast, natural disasters, or increased traffic loads over time. The addition of FRP materials to upgrade the deficiencies or to strengthen the structural components prior to collapse can save lives and damage to the infrastructure, and reduces the need for their costly replacement. Furthermore, due to their desirable properties, the retrofit with the FRP materials provides an excellent replacement for traditional materials including steel jacket to strengthen the damaged reinforced concrete structural members that are repairable.

    An innovative, reliable, fast, durable, and cost efficient FRP retrofit technique was proposed to enhance the capacity of bridge components that are in serious need of strengthening due to deterioration, accidental damage, or an increase in axial load demand. The strengthening technique involved the use of FRP sheets to wrap the column as an external reinforcement. Nonlinear finite element analysis (FEA) software program was used to simulate the behavior of scaled-down concrete bridge column models prior and after fiber composite wrapping retrofit. The as-built and FRP-retrofitted columns were compared to access the confinement effectiveness of the retrofit technique necessary to overcome the increase demand in axial load capacity. The FRP-strengthened column showed considerable improvement in axial load and displacement capacities as compared to as-built column model. The findings reveal that the FRP strengthening can be used to restore the original strength of the column that might have been lost due to possible deterioration, and even to carry the increased traffic load that was never designed for. Such solution can postpone the costly replacement of the bridge or bridge components while insuring the safety of the structure. Additionally, the use of fiber reinforced polymers offers an excellent alternative rehabilitation technique as non-metallic sustainable reinforcement with considerable savings relative to conventional strengthening methods due to the low maintenance and life cycle costs."

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