Reliability of new shear design equations for FRP-strengthened concrete bridge girders

Addressing the problem of aging and deficient bridges by complete replacement is cost prohibitive in most cases. Therefore, the strengthening alternative has become a regular activity, which in recent years has started relying on non-traditional civil engineering materials such as fiber reinforced polymers (FRP). Several codes and guidelines have been drafted for the design of FRP-strengthened concrete structures. Earlier efforts to draft these provisions relied on expert input without formal quantification of the risks involved or calibration of the reliability of proposed design expression. Reliability-based calibration efforts for flexural design provision exist in the literature, however, similar efforts for shear strengthening using composites are lacking. In this paper, a detailed study on the reliability of bridge girders strengthened in shear using FRP is presented. A parametric study covering different span lengths, deficiency levels, and anchor configurations was conducted. Results revealed that the proposed equations for FRP-strengthened concrete girders yield acceptable reliability levels.

Language

  • English

Media Info

  • Pagination: 10p
  • Monograph Title: Transport Research Arena (TRA) 2014 Proceedings

Subject/Index Terms

Filing Info

  • Accession Number: 01530701
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: VTI, TRIS, ATRI
  • Created Date: Jul 23 2014 12:54PM