REPAIR OF STEEL COMPOSITE BRIDGE SECTIONS USING CARBON FIBER REINFORCED PLASTIC LAMINATES - RESTRAINT EFFECT OF BEARINGS - PHASE II. FINAL REPORT

This report provides experimental and numerical results of an investigation to examine the feasibility of using carbon fiber reinforced plastic laminates for repairing steel composite beams. The six specimens tested were obtained by cutting 4.5 in. (11.25 cm) thick concrete slabs in two 20 ft x 7 ft (6.1 m x 2.1 m) wide composite bridges with three equi-spaced W8x24 steel beams fabricated during Phase I. Each specimen comprised a 20 ft (6.1 m) long W8x24 steel beam acting compositely with a 28 in. (70 cm) wide, 4.5 in. (11.25 cm) thick concrete slab. The specimens were first loaded in flexure past yielding of the tension flange to simulate distress under service loading. They were then repaired using 12 ft (3.7 m) long, 6.5 in. (16.25 cm) wide, 2 mm or 5 mm thick carbon fiber reinforced plastic (CFRP) laminates that were bonded to the tension flange of the W8x24 steel section using FR-1272 epoxy adhesive augmented by fasteners where needed. The repaired specimens were then tested to failure. The results of the tests indicate that despite the lower modulus and the small thickness of the CFRP laminates used, there were substantial increases in ultimate capacity especially with the thicker laminate. Some improvement in stiffness and increases in the elastic range were also observed. This overall improvement suggests that if long term durability is assured, this technique may be utilized for the speedy on-site repair of structurally sub-standard steel composite bridges.

• Corporate Authors:

  University of South Florida, Tampa

  Department of Civil and Environmental Engineering, 4202 East Fowler Avenue
  Tampa, FL  United States  33620

  Florida Department of Transportation

  Structural Research Center, 2007 East Dirac Drive
  Tallahassee, FL  United States  32310

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Sen, R
  • Liby, L
• Publication Date: 1994-8

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 94 p.

Subject/Index Terms

• TRT Terms: Adhesion; Bearing capacity; Bridges; Carbon fibers; Composite structures; Epoxides; Fasteners; Mechanical tests; Repairing; Stiffness; Strength of materials; Structural strengthening
• Uncontrolled Terms: Composite bridges; Destructive testing; Steel beams
• Old TRIS Terms: Epoxy
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Maintenance and Preservation; Materials; I35: Miscellaneous Materials; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 00662816
• Record Type: Publication
• Report/Paper Numbers: CPI 0510616, CEM/FDOT/191-LO, CEM/ST/94/2
• Contract Numbers: B-7932
• Files: TRIS, USDOT, STATEDOT
• Created Date: Jul 11 1994 12:00AM