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Out-of-plane behaviour of infill masonry panels strengthened with composite materials

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Abstract

The performance of various composite materials applied to strengthen hollow masonry panels under out-of-plane actions is compared here. The strengthening solutions belong to three reinforcement Externally Bonded (EB) wet lay-up systems: (i) bidirectional composite meshes applied with inorganic matrices, i.e., Textile Reinforced Mortars (TRM); unidirectional composite textiles applied with (ii) inorganic matrices, i.e., Steel Reinforced Grouts (SRG), or (iii) organic (epoxy) matrices, i.e., Fibre Reinforced Polymers (FRP), Steel Reinforced Polymers (SRP) and Natural FRPs. Carbon FRP, flax and hemp NFRP, and basalt and glass-based TRM were examined. As inorganic matrix, a cement-based mortar was used for TRMs; in the case of SRGs, comparisons with a magnesia-based matrix were also carried out. Twenty-seven specimens were subjected to simplified four-point monotonic bending tests, aimed at reproducing in the laboratory the failure condition of infill masonry walls under out-of-plane actions. The results are compared in terms of failure mode and mechanical improvement, and provide an analytical evaluation of moment–curvature behaviour according to bilinear laws.

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Acknowledgments

The authors would like to thank the companies which provided the materials for this experimental research: Wienerberger for blocks, Tassullo for embedding mortar, Fidia Technical Global Service for fibres and epoxy saturants, and BASF and Orsan for inorganic matrices. Tests were performed at the Materials and Structures Testing Laboratory, University of Padova, Italy. Graduates L. Albieri, A. Marcolongo and S. Piccin are gratefully thanked for their work in all phases of the research.

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Authors and Affiliations

  1. Department of Cultural Heritage, University of Padova, Piazza Capitaniato 7, 35139, Padua, Italy

    Maria Rosa Valluzzi

  2. Department of Civil, Environmental and Architectural Engineering, University of Padova, Via Marzolo 9, 35131, Padua, Italy

    Francesca da Porto, Enrico Garbin & Matteo Panizza

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  1. Maria Rosa Valluzzi
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  2. Francesca da Porto
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Correspondence to Maria Rosa Valluzzi.

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Valluzzi, M.R., da Porto, F., Garbin, E. et al. Out-of-plane behaviour of infill masonry panels strengthened with composite materials. Mater Struct 47, 2131–2145 (2014). https://doi.org/10.1617/s11527-014-0384-6

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