Uniaxial Tensile Behavior of Anchored Carbon Fabric-Reinforced Cementitious Matrix Plates

Abstract

The fabric-reinforced cementitious matrix (FRCM) has begun to show great application prospects in structural strengthening, especially for seismic strengthening. However, a poor monolithic response of fabric and mortar limits the utility ratio of the fabric and the mechanical properties of FRCM. A simple, fast, and efficient method for improving the bonding properties of the fabric–mortar interface to enhance the performance of the FRCM plate remains to be investigated. In this study, uniaxial tensile tests on 42 carbon fabric-reinforced cementitious matrix (C-FRCM) plates with anchored carbon fiber bundles were performed to analyze the influence of anchorages on their mechanical properties, and to compare them to the prior results of pull-out tests of anchored carbon fiber bundles. The results show that the ultimate tensile stress, the energy dissipation, and the fiber utility ratio can be increased significantly after anchoring, but the anchorage cannot fully restrict the slippage of fiber fabrics. The effect of other variables, such as the bond length of steel plates, the number of fabric layers, and mortar strength, were also tested and discussed.