Analyzing Model Uncertainties for Concrete Beams Flexurally Strengthened with FRP Laminates

Strengthening concrete structures is often conducted to resolve deficiencies due to deterioration caused by harsh environments, design or construction errors, accidents, and changes in design loads. The use of externally-bonded fiber reinforced polymer (FRP) laminates to resolve these deficiencies has gained wide acceptance in the last decade. It offers an economical and practical alternative to other strengthening techniques. FRP techniques have matured and sufficient data is now available so that formal calibrations of design procedures have become possible and are currently urgently needed. This paper presents a study into the uncertainties in estimating the flexural capacity of reinforced concrete members strengthened with FRP laminates. A database of experimental results reported in the literature has been assembled. Flexural capacity estimates using two design approaches are considered. A comparison between capacities obtained using design models and experimental results suggest that the level of strengthening greatly influences the level of uncertainty. This finding is essential for subsequent reliability-based calibrations of design codes. The paper also discusses the implicit strengthening limitations imposed by existing guidelines.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; References; Tables;
  • Pagination: 15p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01045918
  • Record Type: Publication
  • Report/Paper Numbers: 07-2568
  • Files: TRIS, TRB
  • Created Date: Feb 8 2007 7:16PM