Analytical study on the effectiveness of the frcm-confinement of masonry columns

In order to improve the axial capacity of masonry columns, the confinement techniques allow restoring the structural safety without altering the architectural value, the shape and the weight of the member. Traditional techniques do not always meet these criteria, so the innovation of the FRP technique is suitable in overcoming these issues. The use of FRP is now consolidated and its design criteria are well-defined in the Italian CNR DT 200/R1-2013. The criticalities of this reinforcement technique are mainly related to the compatibility of organic matrices with masonry, especially in the case of historical-monumental buildings. This led to the replacement of organic matrix with inorganic matrices, creating systems like the FRCMs (Fabric Reinforced Cementitious Mortars). Despite the high number of applications of this technique on masonry structures, there are still no guidelines that govern its design. Based on a database of experimental compression tests on masonry reinforcements reinforced with FRCM-systems, the article presents an analytical study for calibrating appropriate design formulations to be included in future regulatory codes on this topic