TY - JOUR
T1 - Fiber Reinforced Cementitious Matrix (FRCM) for strengthening historical stone masonry structures
T2 - Experiments and computations
AU - Angiolilli, Michele
AU - Gregori, Amedeo
AU - Pathirage, Madura
AU - Cusatis, Gianluca
N1 - Funding Information:
The work of the first and second authors was sponsored by the University of L’Aquila . The authors gratefully acknowledge the support of the “Aquilaprem S.r.l.” company (L’Aquila, Italy) for the concession of materials and the realization of the masonry samples and the test apparatus.
Funding Information:
The work of the first and second authors was sponsored by the University of L'Aquila. The authors gratefully acknowledge the support of the ?Aquilaprem S.r.l.? company (L'Aquila, Italy) for the concession of materials and the realization of the masonry samples and the test apparatus.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/12/1
Y1 - 2020/12/1
N2 - Seismic events highlight the inherent fragility and vulnerability of stone masonry buildings, which represent a large part of the existing historical and artistic heritage. In order to preserve these structures, numerous reinforcement techniques are typically used on masonry walls, including mortar injections, reinforced drilling, and reinforced concrete plaster. Nowadays new and less invasive strengthening techniques are preferred; among them Fiber Reinforced Cementitious Matrix (FRCM) system with lime-based mortar, which is considered to be more compatible with the intrinsic properties of these ancient structures as compared to cement-based mortar. This work aims to investigate experimentally and computationally FRCM applied as reinforcement to ancient stone masonry. In particular, the paper presents results from diagonal compression tests carried out at the University of L'Aquila (Italy) on stone masonry specimens strengthened with layers of Glass-FRCM (GFRCM). In comparison with unreinforced panels, those strengthened by the GFRCM exhibited a significant increase in shear modulus and shear strength. A computational framework based on the Lattice Discrete Particle Model (LDPM) was then used to reproduce the experimental results. The fracture behavior and the damage evolution in masonry panels were investigated under different assumptions on the GFRCM system features (bond behavior, mortar thickness, fiber anchors and fiber grid). The good agreement between experimental results and the LDPM simulations show that this approach predicts well the mechanical behavior and the damage evolution in stone masonry under quasi-static loading conditions. Moreover, it can be considered a viable tool for engineers in developing effective reinforcement techniques.
AB - Seismic events highlight the inherent fragility and vulnerability of stone masonry buildings, which represent a large part of the existing historical and artistic heritage. In order to preserve these structures, numerous reinforcement techniques are typically used on masonry walls, including mortar injections, reinforced drilling, and reinforced concrete plaster. Nowadays new and less invasive strengthening techniques are preferred; among them Fiber Reinforced Cementitious Matrix (FRCM) system with lime-based mortar, which is considered to be more compatible with the intrinsic properties of these ancient structures as compared to cement-based mortar. This work aims to investigate experimentally and computationally FRCM applied as reinforcement to ancient stone masonry. In particular, the paper presents results from diagonal compression tests carried out at the University of L'Aquila (Italy) on stone masonry specimens strengthened with layers of Glass-FRCM (GFRCM). In comparison with unreinforced panels, those strengthened by the GFRCM exhibited a significant increase in shear modulus and shear strength. A computational framework based on the Lattice Discrete Particle Model (LDPM) was then used to reproduce the experimental results. The fracture behavior and the damage evolution in masonry panels were investigated under different assumptions on the GFRCM system features (bond behavior, mortar thickness, fiber anchors and fiber grid). The good agreement between experimental results and the LDPM simulations show that this approach predicts well the mechanical behavior and the damage evolution in stone masonry under quasi-static loading conditions. Moreover, it can be considered a viable tool for engineers in developing effective reinforcement techniques.
KW - Anchors
KW - Cultural heritage
KW - Diagonal compression test
KW - Fiber reinforcement
KW - Lattice discrete particle model
KW - Lime mortar
KW - Masonry
KW - Shear strength
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U2 - 10.1016/j.engstruct.2020.111102
DO - 10.1016/j.engstruct.2020.111102
M3 - Article
AN - SCOPUS:85089802672
VL - 224
JO - Structural Engineering Review
JF - Structural Engineering Review
SN - 0141-0296
M1 - 111102
ER -