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<\/h4>\nSujet de doctorat<\/strong><\/em><\/span><\/h4>\nR\u00e9paration sismique des portiques en b\u00e9ton arm\u00e9 avec remplissages en ma\u00e7onnerie par une approche hybride FRP\u2013TRM<\/p>\n
R\u00e9sum\u00e9 de la th\u00e8se<\/strong><\/em><\/span><\/h4>\nLes structures en b\u00e9ton arm\u00e9 (BA) avec remplissages en ma\u00e7onnerie pr\u00e9sentent une vuln\u00e9rabilit\u00e9 importante face aux sollicitations sismiques, notamment en raison des interactions complexes entre les \u00e9l\u00e9ments porteurs et les panneaux de remplissage. Les s\u00e9ismes peuvent provoquer des dommages simultan\u00e9s dans ces deux composants, affectant la r\u00e9sistance, la rigidit\u00e9 et la capacit\u00e9 de dissipation d’\u00e9nergie des b\u00e2timents.<\/p>\n
Une strat\u00e9gie hybride de r\u00e9paration post-sismique associe les polym\u00e8res renforc\u00e9s de fibres (FRP), appliqu\u00e9s par voie humide (wet lay-up) pour r\u00e9parer les poutres et poteaux en b\u00e9ton arm\u00e9, aux mortiers renforc\u00e9s de textiles (TRM) destin\u00e9s au renforcement des panneaux de remplissage en ma\u00e7onnerie. L’objectif principal est de restaurer simultan\u00e9ment les performances m\u00e9caniques des deux composants apr\u00e8s un s\u00e9isme, notamment en termes de r\u00e9sistance lat\u00e9rale, de rigidit\u00e9, de ductilit\u00e9 et de capacit\u00e9 de dissipation d’\u00e9nergie.<\/p>\n
Des investigations exp\u00e9rimentales \u00e0 diff\u00e9rentes \u00e9chelles, allant de la caract\u00e9risation des mat\u00e9riaux aux essais sur structures, permettront d’\u00e9valuer l’efficacit\u00e9 de diff\u00e9rentes configurations de r\u00e9paration. Des essais cycliques \u00e0 grande \u00e9chelle, associ\u00e9s \u00e0 des techniques de mesure avanc\u00e9es telles que la corr\u00e9lation d’images num\u00e9riques (DIC) et les capteurs \u00e0 fibres optiques distribu\u00e9es (DFOS), permettront d’analyser les d\u00e9formations, la propagation des fissures, les m\u00e9canismes d’endommagement et les performances structurales.<\/p>\n
Des mod\u00e8les num\u00e9riques non lin\u00e9aires par \u00e9l\u00e9ments finis seront d\u00e9velopp\u00e9s et valid\u00e9s \u00e0 partir des r\u00e9sultats exp\u00e9rimentaux afin d’\u00e9tudier les interactions entre mat\u00e9riaux, l’\u00e9volution de l’endommagement et les ph\u00e9nom\u00e8nes de d\u00e9collement des renforts. Des \u00e9tudes param\u00e9triques contribueront \u00e0 l’optimisation des configurations de r\u00e9paration et au d\u00e9veloppement d’une m\u00e9thodologie de dimensionnement pour une r\u00e9habilitation post-sismique efficace et durable.<\/p>\n
Encadrants<\/strong><\/em><\/span><\/h4>\n\n- Direction de th\u00e8se :\u00a0Aron Gabor<\/b><\/li>\n
- Co-encadrant de th\u00e8se :\u00a0Nadia TARIFA<\/b><\/li>\n<\/ul>\n
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Les structures en b\u00e9ton arm\u00e9 (BA) avec remplissages en ma\u00e7onnerie pr\u00e9sentent une vuln\u00e9rabilit\u00e9 importante face aux sollicitations sismiques, notamment en raison des interactions complexes entre les \u00e9l\u00e9ments porteurs et les panneaux de remplissage. Les s\u00e9ismes peuvent provoquer des dommages simultan\u00e9s dans ces deux composants, affectant la r\u00e9sistance, la rigidit\u00e9 et la capacit\u00e9 de dissipation d’\u00e9nergie des b\u00e2timents.<\/p>\n
Une strat\u00e9gie hybride de r\u00e9paration post-sismique associe les polym\u00e8res renforc\u00e9s de fibres (FRP), appliqu\u00e9s par voie humide (wet lay-up) pour r\u00e9parer les poutres et poteaux en b\u00e9ton arm\u00e9, aux mortiers renforc\u00e9s de textiles (TRM) destin\u00e9s au renforcement des panneaux de remplissage en ma\u00e7onnerie. L’objectif principal est de restaurer simultan\u00e9ment les performances m\u00e9caniques des deux composants apr\u00e8s un s\u00e9isme, notamment en termes de r\u00e9sistance lat\u00e9rale, de rigidit\u00e9, de ductilit\u00e9 et de capacit\u00e9 de dissipation d’\u00e9nergie.<\/p>\n
Des investigations exp\u00e9rimentales \u00e0 diff\u00e9rentes \u00e9chelles, allant de la caract\u00e9risation des mat\u00e9riaux aux essais sur structures, permettront d’\u00e9valuer l’efficacit\u00e9 de diff\u00e9rentes configurations de r\u00e9paration. Des essais cycliques \u00e0 grande \u00e9chelle, associ\u00e9s \u00e0 des techniques de mesure avanc\u00e9es telles que la corr\u00e9lation d’images num\u00e9riques (DIC) et les capteurs \u00e0 fibres optiques distribu\u00e9es (DFOS), permettront d’analyser les d\u00e9formations, la propagation des fissures, les m\u00e9canismes d’endommagement et les performances structurales.<\/p>\n
Des mod\u00e8les num\u00e9riques non lin\u00e9aires par \u00e9l\u00e9ments finis seront d\u00e9velopp\u00e9s et valid\u00e9s \u00e0 partir des r\u00e9sultats exp\u00e9rimentaux afin d’\u00e9tudier les interactions entre mat\u00e9riaux, l’\u00e9volution de l’endommagement et les ph\u00e9nom\u00e8nes de d\u00e9collement des renforts. Des \u00e9tudes param\u00e9triques contribueront \u00e0 l’optimisation des configurations de r\u00e9paration et au d\u00e9veloppement d’une m\u00e9thodologie de dimensionnement pour une r\u00e9habilitation post-sismique efficace et durable.<\/p>\n
Encadrants<\/strong><\/em><\/span><\/h4>\n\n- Direction de th\u00e8se :\u00a0Aron Gabor<\/b><\/li>\n
- Co-encadrant de th\u00e8se :\u00a0Nadia TARIFA<\/b><\/li>\n<\/ul>\n
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