The use of composite materials, in particular Carbon Fibre Composite Materials (CFRP), as reinforcement of both concrete and masonry structures is more and more widespread in the structural rehabilitation and retrofitting of existing buildings, thanks to their excellent mechanical performance combined with lightness and simplicity of application. Since the bond capacity of cfrp reinforcement sheets, with respect to in-plane loads, is generally lower than the composite tensile strength, several methods have been proposed in the literature to increase their strength. Among these, cfrp spike anchors showed to be able to effectively increase strength and ductil- ity of cfrp reinforcement sheets. Nevertheless, their use in technical practice is discouraged by the lack of specific rules that adequately support designers. The development of predictive formulas, appearing necessary to bridge this gap, requires an extensive experimental database that highlights the peculiar char- acteristics of these reinforcements also with reference to the substrate material. As a contribution in this field, this paper presents an experimental program concerning the analysis of the mechanical behaviour of this type of reinforcements applied to masonry panels loaded by out-of-plane cyclic actions. The tests showed that spike anchors effectively increase the mechanical performance of the reinforcement, and in particular its load bearing capacity.
On the mechanical behaviour of anchored CFRP-to-masonry reinforcements / Fagone, Mario; Ranocchiai, Giovanna. - ELETTRONICO. - (2016), pp. 387-393. (Intervento presentato al convegno IBMAC - Brick and Block Masonry – Trends, Innovations and Challenges tenutosi a Padova nel june, 27-29).
On the mechanical behaviour of anchored CFRP-to-masonry reinforcements
FAGONE, MARIO;RANOCCHIAI, GIOVANNA
2016
Abstract
The use of composite materials, in particular Carbon Fibre Composite Materials (CFRP), as reinforcement of both concrete and masonry structures is more and more widespread in the structural rehabilitation and retrofitting of existing buildings, thanks to their excellent mechanical performance combined with lightness and simplicity of application. Since the bond capacity of cfrp reinforcement sheets, with respect to in-plane loads, is generally lower than the composite tensile strength, several methods have been proposed in the literature to increase their strength. Among these, cfrp spike anchors showed to be able to effectively increase strength and ductil- ity of cfrp reinforcement sheets. Nevertheless, their use in technical practice is discouraged by the lack of specific rules that adequately support designers. The development of predictive formulas, appearing necessary to bridge this gap, requires an extensive experimental database that highlights the peculiar char- acteristics of these reinforcements also with reference to the substrate material. As a contribution in this field, this paper presents an experimental program concerning the analysis of the mechanical behaviour of this type of reinforcements applied to masonry panels loaded by out-of-plane cyclic actions. The tests showed that spike anchors effectively increase the mechanical performance of the reinforcement, and in particular its load bearing capacity.File | Dimensione | Formato | |
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