Francesco Micelli1   Nestore Galati2 Laura De Lorenzis 3 Antonio La Tegola4


In the last few years, a notable amount of research has been devoted to the use of Fiber Reinforced Polymer (FRP) materials for strengthening and rehabilitation of existing concrete and masonry structures. One of the most interesting applications of FRP is their use to achieve confinement of concrete and masonry columns. However, experimental data regarding confinement of columns with square or rectangular cross-section and confinement of masonry columns is still very limited. The authors are currently carrying out an experimental and theoretical investigation on confinement of non-circular masonry columns. So far, experimental tests have been conducted on columns made of natural masonry blocks, subjected to static compression loads up to failure. Variables such as different FRP strengthening systems and cross section geometry have been investigated. Wrapping with FRP pre-preg laminates was implemented either alone or in combination with the use of AFRP rebars inserted in epoxy-filled slots into the columns. The use of FRP materials appears to be very effective in enhancing strength, stiffness and ductility of the strengthened members, with efficiency that depends on the tested variables.