Title:
Guidance Emerges for FRP Retrofits of Concrete Diaphragms
Author(s):
Victoria K. Sicaras
Publication:
Concrete International
Volume:
46
Issue:
5
Appears on pages(s):
57-61
Keywords:
strengthening, specimen, funding, recommendation
DOI:
10.14359/51740754
Date:
5/1/2024
Abstract:
New research funded by the ACI Foundation developed and tested retrofit techniques for diaphragms using externally bonded fiber-reinforced polymer (FRP). Key findings from the research are being translated into guidance on how to establish the effective FRP design strain and the nominal shear strength contribution of the FRP. The recommendations also address the use of intermediate and end FRP anchors and limitations on the clear spacing between sheets
Related References:
1. Hutton, H.G.; Dhakal, P.; Eatherton, M.R.; and Jacques, E., “Development of FRP Retrofit Guidelines for Deficient Reinforced Concrete Horizontal Lateral Force Resisting Systems,” Virginia Tech Research Report No. CE/VPI-ST-23/07, Blacksburg, VA, July 2023, 200 pp., https://www.acifoundation.org/Portals/12/xBlog/uploads/2023/8/24/VirginiaTechCE-VPI-ST-23-07FRPRetrofitofDeficientReinforcedConcreteHorizontalLateralForceResistingSystems.pdf.
2. ACI Committee 440, “Design and Construction of Externally Bonded Fiber-Reinforced Polymer (FRP) Systems for Strengthening Concrete Structures—Guide (ACI PRC-440.2-23),” American Concrete Institute, Farmington Hills, MI, 2023, 109 pp.