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Repair of piers and spandrel masonry assemblies with grouting and FRCM systems: An experimental and analytical study

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Resumo:The current work investigates the repair of damaged unreinforced masonry (URM) piers and spandrel assemblies using grouting and Fiber Reinforced Cementitious Matrix (FRCM) systems. Two real-scale brick and lime mortar URM piers and spandrel assemblies were initially subjected to extensive flexural and shear damage from a differential vertical uplift test. Post-damage, one assembly was repaired with a high-performance lime-based grout, while the other received both grout and FRCM. Subsequent retesting demonstrated that both techniques effectively restored in-plane stiffness and shear capacity. The grouted assembly regained the shear capacity of the undamaged specimen, with notable post-cracking stiffness and ductility. The assembly repaired with grout and FRCM showed a significant increase in shear capacity and displacement ductility, exceeding initial values by at least 50 % and 56 %, respectively. The dynamic properties were analyzed using Ambient Vibration Testing (AVT), confirming the improved in-plane stiffness following changes in dynamic properties. The study's results were analyzed with analytical models, accounting for the effect of timber lintels, masonry arches and the FRCM, validating the repairs' effectiveness with high correlation. The results highlight the potential of these techniques for restoring structural integrity in damaged URM structures, with recommendations for further validation on the proposed analytical formulations through additional experimental studies.
Autores principais:Karanikoloudis, Georgios
Outros Autores:Serra, João B.; Lourenço, Paulo B.
Assunto:Engenharia e Tecnologia::Engenharia Civil Indústria, inovação e infraestruturas
Ano:2025
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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