THERMOGRAPHIC BLISTER DETECTION IN FRP STRENGTHENED RC ELEMENTS AND DEGRADATION EFFECTS ON SECTION PERFORMANCE

This paper represents a progress report on the development of a technique to evaluate the extent of bonding success between advanced composites and concrete substrate. A new nondestructive evaluation method is presented for the detection of blisters at the interface of fiber reinforced polymer (FRP) and concrete. Artificial voids of controlled size were inserted in the bond line of composite bonded concrete specimens to simulate the potential creation of imperfections during site applications. A simple heat source was used to generate heat for dissipation in the FRP-concrete joint. An infrared camera was used to detect the heat transfer. It was found that the originally simulated 15mm diameter blisters could be clearly detected by the IR camera from 7.6m. This nondestructive approach is therefore considered to have great potential for use in FRP strengthening schemes. Alongside this work, beams with simulated blisters were load tested to failure. It was found that blisters of small magnitude do not fundamentally alter load/deformation characteristics, but seriously curtail ductility through premature failure.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0080439454
• Corporate Authors:

  Elsevier

  The Boulevard, Langford Lane
  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • Delpak, R
  • Shih, JKC
  • Andreou, E
  • Hu, C W
  • Tann, D B
• Conference:
  • FRP Composites in Civil Engineering. Proceedings of the International Conference on FRP Composites in Civil Engineering.
  • Location: Hong Kong, China
  • Date: 2001-12-12 to 2001-12-15
• Publication Date: 2001

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 1135-42

Subject/Index Terms

• TRT Terms: Blistering; Bonding and joining; Composite construction; Composite materials; Conferences; Ductility; Fiber reinforced plastics; Nondestructive tests; Reinforced concrete; Structural analysis; Structural deterioration and defects; Structural engineering; Structural strengthening; Thermographs
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00921084
• Record Type: Publication
• ISBN: 0080439454
• Report/Paper Numbers: Volume 2
• Files: TRIS
• Created Date: Mar 26 2002 12:00AM