Reinforced Concrete Structures with Hybrid Technology of Pre-Stressed CFRP Sheets and Pre-Screwed Bolts

The carbon fiber reinforced composite polymer (CFRP) reinforcement is currently one of the most popular and effective methods for retrofitting and strengthening concrete structures. However, the nonprestressed CFRP reinforcement cannot make full use of the tensile strength of CFRP, and the crack development of the stiffening beam cracks cannot restrain actively either. The failure of a strengthened or retrofitted structure with the nonprestressed CFRP is usually caused by the breakdown of the bond at the CFRP-epoxy interface or at the concrete-epoxy interface which is weaker than other places. Much effort has been made in the research community to improve the bond strength and restrain the crack development of the strengthening beam cracks. The full CFRP strength can usually be achieved in the strengthened or retrofitted structure with the prestressed CFRP. The prescrewed bolts fastening is another new mechanical fastening technique that is used to bond one material to another to improve the bond interface strength. Therefore, this paper introduces a new hybrid bonding prestressed technique that combines prestressed CFRP reinforcement and prescrewed bolts fastening. New tensioning equipment was developed to prestress CFRP. The strengthened reinforced concrete (RC) beam experiments have been finished to check the strengthening effect. Experimental tests have demonstrated that the new hybrid technology of prestressed CFRP sheets and prescrewed bolts can make full use of the tensile strength of CFRP and actively restrain the crack development of the strengthening beam cracks.

• Record URL:
  • https://doi.org/10.1061/9780784478530.001
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784478530
• Supplemental Notes:
  • © 2014 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Guan, Yanhua
  • Yue, Hongya
• Conference:
  • Geo-Hubei 2014 International Conference on Sustainable Civil Infrastructure
  • Location: Yichang Hubei, China
  • Date: 2014-7-20 to 2014-7-22
• Publication Date: 2014-6

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 1-8
• Monograph Title: Recent Advances in Material, Analysis, Monitoring, and Evaluation in Foundation and Bridge Engineering

Subject/Index Terms

• TRT Terms: Adhesive bond strength; Bolting; Carbon fibers; Fiber reinforced polymers; Prestressing; Reinforced concrete bridges; Retrofitting; Structural strengthening; Tensile strength
• Uncontrolled Terms: Reinforced concrete beams
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I30: Materials;

Filing Info

• Accession Number: 01536434
• Record Type: Publication
• ISBN: 9780784478530
• Files: TRIS, ASCE
• Created Date: Sep 1 2014 3:09PM