A crucial aspect when FRP plates or sheets are externally glued to masonry elements is the bond between the reinforcement and the substrate, as it influences in great extent the effectiveness of the utilized technique. Some researches have been carried out on the use of composite materials in masonry structures, however few studies have been addressed to the analysis of the interface behaviour. The present paper reports an experimental and theoretical investigation on the bond between Carbon and Glass Fiber Sheets and typical stones, utilized for the construction of masonry structures in the South of Italy. At this aim a push-off test has been assessed and the bond performance has been investigated, varying some significant parameters. The state of strain within the reinforcement, the ultimate capacity and the type of bond failure have been recorded during testing. Obtained results are presented and discussed. Among all the relevant influence of the substrate not only in terms of mechanical properties but also referring to physical properties has been found. In addition, the possibility to extent theoretical models available for FRP- concrete interface to the case of masonry substrate is investigated, allowing to gather their effectiveness for the analysed cases.

Analysis of Bond Performance between FRP Sheets and Calcarenite Stones under Service and Ultimate Conditions

AIELLO, Maria Antonietta;SCIOLTI, Margherita Stefania
2008

Abstract

A crucial aspect when FRP plates or sheets are externally glued to masonry elements is the bond between the reinforcement and the substrate, as it influences in great extent the effectiveness of the utilized technique. Some researches have been carried out on the use of composite materials in masonry structures, however few studies have been addressed to the analysis of the interface behaviour. The present paper reports an experimental and theoretical investigation on the bond between Carbon and Glass Fiber Sheets and typical stones, utilized for the construction of masonry structures in the South of Italy. At this aim a push-off test has been assessed and the bond performance has been investigated, varying some significant parameters. The state of strain within the reinforcement, the ultimate capacity and the type of bond failure have been recorded during testing. Obtained results are presented and discussed. Among all the relevant influence of the substrate not only in terms of mechanical properties but also referring to physical properties has been found. In addition, the possibility to extent theoretical models available for FRP- concrete interface to the case of masonry substrate is investigated, allowing to gather their effectiveness for the analysed cases.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11587/109455
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