CIAM-UTC-REG44
Research Team
PI: Jovan Tatar, Ph.D., University of Delaware
Funding Sources
University of Delaware Federal Share — $74,709
University of Delaware Match Share — $74,709
Total Project Cost — $149,418
Agency ID or Contract Number
69A3551847103
Start and End Dates
01/04/2022 — 07/05/2023
Project Description
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:
- Enhancing the shear capacity of shear-deficient RC beams
- 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.