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Mechanical Integrity and Sustainability of Pre-Stressed Concrete Bridge Girders Repaired by Epoxy Injection – Phase 1

The ultimate goal of this project is to assess the mechanical integrity and sustainability of prestressed concrete beams during the entire life cycle of the built infrastructure, which includes crack propagation, crack reparation, repaired crack aging with possible re-opening. In Phase I, the research objectives are to: (1) Explain in which conditions the strength of cracked concrete can be recovered by epoxy injection; (2) Design the injection method for optimal mechanical performance. Since the mid-point review, the main achievements in this project period have been: the design of finite element method (FEM) models comprising concrete elements and prestressed steel bar reinforcements for four types of girders, used in Tennessee, Washington State, Virginia and Florida; the simulation of load tests reported in the literature for these four girders, with elastic concrete; the modeling of four types of cracks described in the Precast/Prestressed Concrete Institute (PCI) manual; the simulation of the load test for the four types of girders, for the four types of damage; the assessment of the effect of initial damage on the stress distribution and on the deflection of the girders; a literature review on the Cohesive Zone Models that can be used to predict not only the mechanical damage, but also the geometric discontinuities induced by fracture propagation in concrete.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; Photos; References; Tables;
  • Pagination: 84p

Subject/Index Terms

Filing Info

  • Accession Number: 01644106
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-GA-17-1624, Report No. 16-24
  • Contract Numbers: 0013731
  • Files: NTL, TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Aug 22 2017 10:00AM