Un-reinforced masonry (URM) walls are one of the most widely used types of construction in the world but they are prone to failure when subjected to overstresses caused by out-of-plane and in-plane loads. The successful use of near surface mounted (NSM) fiber-rein forced polymer (FRP) bars for strengthening of concrete members has been extended, in this experimental program, to URM walls: circular and rectangular FRP bars have been embedded in grooves of different sizes using of two pastes: a latex modified cementitious paste and an epoxy-based paste. The results, in terms of flexural strengthening and shear strengthening, are presented and discussed in this paper. They show the potential of this technique for retrofitting masonry structures: the installation time is minimal, the appearance is preserved, the capacity marked increased and the behavior at failure more ductile.
Flexural and shear strengthening of un-reinforced masonry with FRP bars
VALLUZZI, MARIA ROSA;MODENA, CLAUDIO
2006
Abstract
Un-reinforced masonry (URM) walls are one of the most widely used types of construction in the world but they are prone to failure when subjected to overstresses caused by out-of-plane and in-plane loads. The successful use of near surface mounted (NSM) fiber-rein forced polymer (FRP) bars for strengthening of concrete members has been extended, in this experimental program, to URM walls: circular and rectangular FRP bars have been embedded in grooves of different sizes using of two pastes: a latex modified cementitious paste and an epoxy-based paste. The results, in terms of flexural strengthening and shear strengthening, are presented and discussed in this paper. They show the potential of this technique for retrofitting masonry structures: the installation time is minimal, the appearance is preserved, the capacity marked increased and the behavior at failure more ductile.
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