STRUCTURAL INTEGRITY OF RC COLUMNS WRAPPED WITH FRP SHEET SUBJECTED TO VARIOUS ENVIRONMENTAL CONDITIONS INCLUDING CORROSION

Although the short-term performance of reinforced concrete (RC) columns wrapped with fiber reinforced polymer (FRP) composite materials has been widely studied, research studies on the long-term performance are limited. The objective of this study was to evaluate the effects of various environmental conditions on the long-term behavior of RC columns wrapped with FRP sheets. The experimental program comprised two parts - ambient environmental effect tests and corrosion tests. The environmental conditions considered in the ambient environmental tests included (1) freeze-thaw cycles, (2) high-temperature cycles, (3) high-humidity cycles, (4) ultraviolet (UV) radiation, and (5) saline solution; while the corrosion tests dealt with the corrosion of steel reinforcement embedded in RC columns wrapped with FRP sheets. RC columns were wrapped with carbon fiber reinforced polymer (CFRP) sheets and glass fiber reinforced polymer (GFRP) sheets and conditioned under the environmental conditions listed. After the environmental conditioning, uni-axial compression tests were conducted in order to evaluate the effects on the mechanical properties, such as column capacity, stiffness, and ductility. The test results showed that the mechanical properties were affected due to the environmental conditioning and the corrosion of steel reinforcement, and the effects varied according to the types of environmental conditions. Based on these results, improved design guidelines for the RC columns wrapped with FRP sheet were proposed. The proposed design guidelines included an analytical model and reduction factors to account for the effects of various environmental conditions.

• Record URL:
  https://spexternal.modot.mo.gov/sites/cm/CORDT/RDT04021.pdf
• Record URL:
  https://ntlrepository.blob.core.windows.net/lib/56000/56000/56054/MO_RDT04021.PDF
• 
• Corporate Authors:

  University of Missouri, Rolla

  Butler-Carlton Hall
  Rolla, MO  United States  65409

  Missouri Department of Transportation

  Research, Development and Technology, 1617 Missouri Boulevard
  P.O. Box 270
  Jefferson City, MO  United States  65102
• Authors:
  • Belarbi, A
  • Myers, J J
  • Chandarshekhara, K
  • Watkins, S E
  • Bae, S-W
• Publication Date: 2004-9

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 212 p.

Subject/Index Terms

• TRT Terms: Carbon fibers; Columns; Composite materials; Compression tests; Corrosion; Deterioration by environmental action; Environmental impacts; Fiber reinforced plastics; Freeze thaw durability; Glass fiber reinforced plastics; High temperature; Humidity; Mechanical properties; Polymers; Reinforced concrete; Reinforcing steel; Seawater; Structural analysis; Ultraviolet radiation; Uniaxial stress
• Subject Areas: Bridges and other structures; Design; Environment; Geotechnology; Highways; Materials; I24: Design of Bridges and Retaining Walls; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 00986426
• Record Type: Publication
• Report/Paper Numbers: RDT 04-021, Final Report
• Files: NTL, TRIS, STATEDOT
• Created Date: Feb 25 2005 12:00AM