Fabric Reinforced Cementitious Matrix (FRCM) materials are thin, laminated composites consisting of a cementitious matrix that embodies one or multiple layers of continuous synthetic fabrics. FRCM is externally bonded to existing structural members subject to shear, bending, axial, or torsion induced stresses to enhance their performance. In the United States, FRCM material characterization is established by the “Acceptance Criteria AC434,” and the design and analysis of the FRCM-strengthened structural members follows the ACI549.4R-13 design guidelines. This paper investigates the analysis and design of carbon FRCM-strengthened RC beams in flexure. The FRCM-strengthened RC beams were experimentally tested, and the analytical and experimental results are compared in the paper. The ACI 549.4R-13 guidelines and design limitations are also discussed. The analytical and experimental results were in agreement at ultimate capacities. Collective results of studies on flexural strengthening of RC beams with different FRCM systems were used to establish a relationship between FRCM reinforcement ratio and increase in ultimate capacity which will help the designer at design phase to select the optimum FRCM reinforcement ratio for required strengthening demand.
- RC beam
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Materials Science(all)