The use of Fiber Reinforced Cementitious Mortar (FRCM) systems for structural retrofitting of masonry structureshas become increasingly popular in the last years, due to the capability of this technique in overcoming some ofthe drawbacks related to the adoption of resin-based composites. In fact, FRCM systems ensure good compatibilitybetween the reinforcing layers and the substrate, achieving also the removability requirement, which is offundamental importance for historical constructions. Recent research studies focused on the mechanicalperformance of FRCM materials, by studying its tensile behaviour and bond between the strengthening layer andmasonry, pointing out as failure is always reached due to loss of bond with different mechanisms, the latterdepending on the physical properties of FRCM and masonry. Further studies investigated on the effect of FRCMwraps on the compressive behaviour of concrete members and demonstrated as the application of mortar-basedcomposites allows increasing the strength and, above all, the ductility of the column. The main difference withFRP confined columns is related to the different post-peak behaviour, characterized by a softening branch.Differently, few studies are actually available on the literature on the efficiency of FRCM confinement inenhancing the compressive behaviour of masonry columns.This paper presents the results of an experimental investigation on the effect of FRCM wraps on the compressivebehaviour of calcarenite masonry columns. A preliminary study on the mechanical performances of thestrengthening layer is performed by selecting three different mortar grades for the FRCM and testing these underflexure and compression. Moreover, tensile tests on the glass fibre fabric and on FRCM strips are performed tocharacterize the behaviour of the reinforcing system. Finally, eleven columns are tested under concentriccompression, recording the axial strain, and discussion is made on modes of failure and gains of strength andultimate strain.
|Title of host publication||Proc., 9th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE 2018)|
|Number of pages||8|
|Publication status||Published - 2018|
All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Polymers and Plastics