Design of Anchors for Rapid and Durable Strengthening of Bridges with Externally Bonded Carbon Fiber Reinforced Polymer Composites—Phase 2

The beams tested in Phase 1 had sufficient steel stirrup shear reinforcement, which allowed the research team to evaluate the effectiveness of U-wraps in anchoring the longitudinal CFRP reinforcement. However, in practice, an RC beam deficient in flexure may also be deficient in shear, requiring both vertical (shear) and longitudinal (flexural) CFRP reinforcement. Due to the lack of experimental data, the current ACI 440.2R design guidelines do not permit to count on shear U-wrap reinforcement to provide anchorage for the longitudinal CFRP. Thus, the specific objectives of the proposed research program are to determine how effective U-wraps are in: i. enhancing the shear capacity of shear-deficient RC beams, AND ii. increasing strain utilization of longitudinal CFRP reinforcement in shear-deficient RC beams. The primary expected outcome of this work will be more economical FRP strengthening. This will be accomplished by allowing the designer to limit the required area of longitudinal CFRP reinforcement through improved strain utilization (provided by the U-wrap anchorage) while, the same time, being able to consider U-wrap anchors as shear reinforcement.

• Supplemental Notes:
  • UDEL FED Share $74,709 UDEL Match $74,709

Language

• English

Project

• Status: Active
• Funding: $149418
• Contract Numbers:

  69A3551847103

• Sponsor Organizations:

  Office of the Assistant Secretary for Research and Technology

  University Transportation Centers Program
  Department of Transportation
  Washington, DC  United States  20590
• Managing Organizations:

  Center for Integrated Asset Management for Multimodal Transportation Infrastructure Systems (CIAMTIS)

  Pennsylvania State University
  University Park, PA  United States  16802
• Project Managers:

  Donnell, Eric

• Performing Organizations:

  Delaware Center for Transportation

  University of Delaware
  Newark, DE  United States  19716
• Principal Investigators:

  Tatar, Jovan

• Start Date: 20220104
• Expected Completion Date: 20230705
• Actual Completion Date: 0
• USDOT Program: University Transportation Centers

Subject/Index Terms

• TRT Terms: Anchors (Structural connectors); Carbon fibers; Composite structures; Fiber reinforced materials; Flexural strength; Highway bridges; Shear tests; Steel; Structural strengthening
• Subject Areas: Bridges and other structures; Highways; Materials;

Filing Info

• Accession Number: 01835210
• Record Type: Research project
• Source Agency: Center for Integrated Asset Management for Multimodal Transportation Infrastructure Systems (CIAMTIS)
• Contract Numbers: 69A3551847103
• Files: UTC, RIP
• Created Date: Feb 1 2022 4:08PM