Short and Medium Term Durability Evaluation of FRP-Confined Circular Concrete

Evaluation of environmental durability of concrete circular specimens strengthened using externally applied fiber-reinforced-polymer (FRP) composites for confinement reinforcement was studied. FRP-confined concrete cylinder tests were carried out for various environmental exposure conditions including interior, exterior, and freeze–thaw cycling in saltwater. Two types of resin matrix-based FRP composite systems, including epoxy and urethane resin, utilizing either carbon or glass fibers, were used. In addition, continuous single and double layer wrapping schemes were applied for confinement for each of the 4 FRP composite systems. The overall stress–strain behavior of FRP-confined concrete does not change fundamentally but different levels of exposure significantly affect its absolute stress–strain curve. The radial strain and corresponding axial strain at the point of zero volumetric strain is significantly affected by different levels of environmental exposure. It is proposed that the relative FRP composite effectiveness must be used to calculate the ultimate radial strain of FRP-confined concrete. It was found that for the 4 FRP systems studied, the ultimate radial strain is not significantly affected by the type of exposure. The authors believe that results shown herein will help engineers understand the short and midterm effects of the environment on FRP confined concrete; long term effects are still under investigation.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10900268
• Authors:
  • Saenz, Nicolas
  • Pantelides, Chris P
• Publication Date: 2006-5

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 244-253
• Serial:
  • Journal of Composites for Construction
  • Volume: 10
  • Issue Number: 3
  • Publisher: American Society of Civil Engineers
  • ISSN: 1090-0268
  • EISSN: 1943-5614
  • Serial URL: http://ascelibrary.org/journal/jccof2

Subject/Index Terms

• TRT Terms: Columns; Composite construction; Composite materials; Compressive strength; Concrete plastic composites; Concrete structures; Confined concrete; Durability; Fiber reinforced plastics; Jacketing (Strengthening); Materials by strength or resistance to chemical action; Structural strengthening
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

• Accession Number: 01026236
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 29 2006 9:12AM