Abstract
ABSTRACT The use of Fibre Reinforced Polymer (FRP) plates and sheets for strengthening masonry structures is a promising technique but further investigations are needed in this area in order to accomplish design requirements. The FRP materials have advantages over steel plates and strips in that they are characterized from a high strength to weight ratio, no electrochemical corrosion problem and ease of erection on site. Of vital importance in joining two components together is the bonding performance between two very different adherents, as masonry and FRPs. The bond properties will determine the degree of effectiveness of the structural system. A considerable world wide effort has been expended into investigating the bond characteristics between RC elements and composite materials but little work has been undertaken in the sphere of masonry structures. The present paper reports on part of a research project, still in progress, devoted to the analyses of the bonding characteristics between FRP sheets and typical natural stones utilized for masonry structures in Southern Italy. The test procedure will be given and the results obtained from bond performance will be discussed. Two commercially available CFRP sheets and two different types of masonry blocks have been used in the first stage of the analysis. Bond stresses at the interface between the two adherends have been evaluated and slip values determined. The influence of the anisotropy of the masonry material has also been considered as well as the bond length parameter.
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