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The effect of cross-section morphology on the out-of-plane seismic behaviour of two-leaf masonry walls

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Resumo:Lack of connections within structural elements or between leaves in multi-leaf masonry can initiate out-of-plane failure of unreinforced masonry walls. When the leaves in the wall cross-section are assembled without adherence to established “rules of art”, failure may be easily triggered by modest seismic actions. A significant limitation in integrating cross-section morphology into seismic assessments is the challenge of accurately surveying the geometry, particularly in historic masonry structures, where high costs and restrictions on destructive testing may limit the achievable knowledge level. However, evaluating the impact of cross-section morphology on out-of-plane seismic behaviour can help to optimise survey protocols by prioritising key factors. This study systematically analyses two-leaf masonry walls with varying craftsmanship via discrete element-based pushover analysis, critically examining the effects of cross-section morphology on strength, displacement capacity, and failure mechanisms. Results illustrate correlations between structural response measures and the frequency and quality of transverse connections. Certain morphology configurations reduce both the force and displacement capacity by up to 50 % and 65 %, respectively, as compared to the single-leaf response. The pattern's effect is most pronounced in the case of stockier walls (height/width >6.0) and under high overload levels (>0.5 MPa).
Autores principais:Szabó, Simon
Outros Autores:Pulatsu, Bora; Funari, Marco Francesco; Lourenço, Paulo B.
Assunto:Historic masonry structures Cross-section morphology Out-of-plane failure Multi-leaf masonry wall
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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