Use of Carbon Fiber Reinforced Polymer (CFRP) with CFRP Anchors for Shear-Strengthening and Design Recommendations/Quality Control Procedures for CFRP Anchors

The objective of the study was to demonstrate the feasibility of using bi-directional layouts of carbon fiber reinforced polymer (CFRP) for shear strengthening of bridge girders. In a previous project (0-6306), it was demonstrated that uni-directional CFRP strips and CFRP anchors improved the shear strength of reinforced concrete elements. Because the data on the bi-directional layout of CFRP were limited, additional work was carried out to understand the behavior and design of CFRP strips and anchors for bridge elements subjected to large shear forces. The tests indicated that bi-directional CFRP layouts did not consistently improve the shear capacity but the loads at first shear cracking increased (20 to 40% over the loads for uni-directional layouts of T-beams and less than 10% for pile cap girders), which improved serviceability by reducing crack widths and improving the stiffness of the members. Anchor installation is critical to shear strengthening so quality control procedures are needed to make sure that material used and installation procedures meet design requirements.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Technical Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 278p

Subject/Index Terms

Filing Info

  • Accession Number: 01634623
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/TX-16/0-6783-1, Report No. 0-6783-1
  • Contract Numbers: 0-6783
  • Files: NTL, TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Apr 6 2017 10:58AM