{"id":23450,"date":"2026-06-29T08:28:07","date_gmt":"2026-06-29T06:28:07","guid":{"rendered":"https:\/\/incoperfil.com\/?post_type=guia-tecnica&#038;p=23450"},"modified":"2026-07-06T10:55:42","modified_gmt":"2026-07-06T08:55:42","slug":"14-types-darmatures-dans-le-plancher-collaborant","status":"publish","type":"guia-tecnica","link":"https:\/\/incoperfil.com\/fr\/guia-tecnica\/14-types-darmatures-dans-le-plancher-collaborant\/","title":{"rendered":"14. Types d\u2019armatures dans le plancher collaborant"},"content":{"rendered":"<p data-start=\"670\" data-end=\"997\">Les diff\u00e9rents types d\u2019armatures dans le plancher collaborant garantissent le comportement structurel du syst\u00e8me en phase de service. Ces armatures contr\u00f4lent la fissuration du b\u00e9ton, assurent la capacit\u00e9 portante de la dalle mixte et permettent de satisfaire aux exigences de r\u00e9sistance au feu d\u00e9finies dans les Eurocodes 3 et 4.<\/p>\n<h2 data-start=\"999\" data-end=\"1045\">Types d\u2019armatures dans le plancher collaborant<\/h2>\n<p data-start=\"1047\" data-end=\"1117\">Selon leur position et leur fonction structurelle, on distingue :<\/p>\n<ul data-start=\"1119\" data-end=\"1262\">\n<li data-start=\"1119\" data-end=\"1145\">\n<p data-start=\"1121\" data-end=\"1145\">Armatures de moments n\u00e9gatifs.<\/p>\n<\/li>\n<li data-start=\"1146\" data-end=\"1183\">\n<p data-start=\"1148\" data-end=\"1183\">Armatures de moments positifs ou armatures de feu.<\/p>\n<\/li>\n<li data-start=\"1184\" data-end=\"1231\">\n<p data-start=\"1186\" data-end=\"1231\">Treillis anti-fissuration (armature sup\u00e9rieure).<\/p>\n<\/li>\n<li data-start=\"1232\" data-end=\"1262\">\n<p data-start=\"1234\" data-end=\"1262\">Armatures de renfort local.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"1264\" data-end=\"1288\">Armatures de moments n\u00e9gatifs<\/h2>\n<p data-start=\"1290\" data-end=\"1462\">Les armatures de moments n\u00e9gatifs sont dispos\u00e9es dans la partie sup\u00e9rieure de la dalle, au-dessus des appuis interm\u00e9diaires dans les planchers continus, afin de r\u00e9sister aux efforts de traction g\u00e9n\u00e9r\u00e9s dans cette zone.<\/p>\n<p data-start=\"1464\" data-end=\"1728\">Elles sont g\u00e9n\u00e9ralement constitu\u00e9es de barres plac\u00e9es au-dessus de l\u2019axe des nervures et sous le treillis sup\u00e9rieur. \u00c0 titre indicatif, leur longueur s\u2019\u00e9tend approximativement sur un tiers de la port\u00e9e de chaque c\u00f4t\u00e9 de l\u2019appui, devant toujours \u00eatre ajust\u00e9e par le calcul.<\/p>\n<p data-start=\"1730\" data-end=\"1931\">Les diam\u00e8tres usuels se situent entre \u00d86 et \u00d816 mm. L\u2019\u00e9paisseur de la couche de compression doit garantir l\u2019enrobage minimal exig\u00e9 par la r\u00e9glementation, assurant la durabilit\u00e9 face \u00e0 la corrosion.<\/p>\n<h2 data-start=\"1933\" data-end=\"1968\">Armatures de moments positifs ou armatures de feu<\/h2>\n<p data-start=\"1970\" data-end=\"2221\">Les armatures de moments positifs, \u00e9galement appel\u00e9es armatures de feu, sont plac\u00e9es dans la partie inf\u00e9rieure des nervures, \u00e0 l\u2019int\u00e9rieur de la g\u00e9om\u00e9trie du profil collaborant. Leur fonction est de r\u00e9sister aux efforts de traction dans la zone inf\u00e9rieure du plancher pendant la phase de service.<\/p>\n<p data-start=\"2223\" data-end=\"2401\">En cas d\u2019incendie, ces armatures maintiennent la capacit\u00e9 portante de l\u2019ensemble, permettant d\u2019atteindre des classifications REI en fonction de l\u2019\u00e9paisseur de la dalle et de la section mise en \u0153uvre.<\/p>\n<p data-start=\"2403\" data-end=\"2433\">Dans les profils Incoperfil<\/p>\n<ul data-start=\"2435\" data-end=\"2593\">\n<li data-start=\"2435\" data-end=\"2532\">\n<p data-start=\"2437\" data-end=\"2532\">Dans INCO 70.4 et INCO 100.3 R, l\u2019armature est situ\u00e9e \u00e0 environ 40 mm du bord inf\u00e9rieur.<\/p>\n<\/li>\n<li data-start=\"2533\" data-end=\"2593\">\n<p data-start=\"2535\" data-end=\"2593\">Dans INCO 100.3, elle se situe \u00e0 environ 65 mm du bord inf\u00e9rieur.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2595\" data-end=\"2730\">Les diam\u00e8tres les plus courants varient entre \u00d86 et \u00d816 mm, d\u00e9finis en fonction des charges et des exigences de r\u00e9sistance au feu.<\/p>\n<h2 data-start=\"2732\" data-end=\"2757\">Treillis anti-fissuration<\/h2>\n<p data-start=\"2759\" data-end=\"2994\">Le treillis sup\u00e9rieur a pour fonction principale de contr\u00f4ler la fissuration de la couche de compression. Dans certaines configurations, il peut \u00e9galement contribuer \u00e0 l\u2019absorption des moments n\u00e9gatifs, r\u00e9duisant ainsi la n\u00e9cessit\u00e9 de renforts suppl\u00e9mentaires.<\/p>\n<p data-start=\"2996\" data-end=\"3157\">Il est dispos\u00e9 sur toute la surface du plancher, g\u00e9n\u00e9ralement avec des diam\u00e8tres compris entre \u00d86 et \u00d812 mm et des espacements entre 150 et 200 mm, selon les exigences du projet.<\/p>\n<p data-start=\"3159\" data-end=\"3317\">Il doit \u00eatre plac\u00e9 dans la couche de compression, dont l\u2019\u00e9paisseur doit permettre de garantir l\u2019enrobage minimal requis et d\u2019assurer la rigidit\u00e9 ad\u00e9quate de l\u2019ensemble.<\/p>\n<h2 data-start=\"3319\" data-end=\"3349\">Armatures de renfort local<\/h2>\n<p data-start=\"3351\" data-end=\"3599\">Dans les zones pr\u00e9sentant des concentrations de charges, des ouvertures, des changements de g\u00e9om\u00e9trie ou des discontinuit\u00e9s, des armatures suppl\u00e9mentaires longitudinales ou transversales peuvent \u00eatre dispos\u00e9es afin d\u2019assurer une redistribution correcte des efforts et de limiter la fissuration localis\u00e9e.<\/p>\n<h2 data-start=\"3601\" data-end=\"3622\">Calcul des armatures<\/h2>\n<p data-start=\"3624\" data-end=\"3817\">Le dimensionnement des armatures du plancher collaborant d\u00e9pend de la port\u00e9e entre appuis, des charges du projet, de l\u2019\u00e9paisseur de la dalle, du nombre de trav\u00e9es et des exigences de r\u00e9sistance au feu.<\/p>\n<p data-start=\"3819\" data-end=\"4015\">La justification doit \u00eatre r\u00e9alis\u00e9e conform\u00e9ment aux normes UNE-EN 1993-1-3, UNE-EN 1994-1-1 et UNE-EN 1994-1-2, en v\u00e9rifiant les \u00e9tats limites ultimes, les \u00e9tats limites de service et le comportement au feu.<\/p>\n<h2 data-start=\"4017\" data-end=\"4030\">Conclusion<\/h2>\n<p data-start=\"4032\" data-end=\"4378\">La combinaison appropri\u00e9e d\u2019armatures de moments n\u00e9gatifs, d\u2019armatures inf\u00e9rieures de moments positifs ou de feu et de treillis sup\u00e9rieur garantit le comportement structurel et la durabilit\u00e9 du plancher collaborant. Leur disposition doit \u00eatre d\u00e9finie par calcul structurel, en coh\u00e9rence avec les charges, la g\u00e9om\u00e9trie du syst\u00e8me et les exigences r\u00e9glementaires du projet.<\/p>\n<h2>Manuel technique d\u2019Incoperfil<\/h2>\n<p data-start=\"5385\" data-end=\"5609\">Pour la d\u00e9finition compl\u00e8te du syst\u00e8me, les crit\u00e8res de conception, les bases de calcul, les tableaux de r\u00e9sistance, les d\u00e9tails constructifs et les proc\u00e9dures de mise en \u0153uvre, consultez le Manuel Technique du Plancher Collaborant d\u2019Incoperfil, disponible apr\u00e8s inscription dans la rubrique Documentation du site web.<\/p>\n<hr data-start=\"5611\" data-end=\"5614\" \/>\n<p data-start=\"5616\" data-end=\"5650\">Derni\u00e8re mise \u00e0 jour : f\u00e9vrier 2026<\/p>\n<p data-start=\"5652\" data-end=\"5886\" data-is-last-node=\"\" data-is-only-node=\"\">\u00a9 Incoperfil. Tous droits r\u00e9serv\u00e9s.<br data-start=\"5696\" data-end=\"5699\" \/>Le contenu technique de cet article fait partie du Manuel Technique du Plancher Collaborant et de la documentation enregistr\u00e9e par Incoperfil aupr\u00e8s de ColorURIS (Acte n\u00b0 1-INCOPERFIL-12.2025).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La conception et la disposition correctes des armatures \u2014 de moments n\u00e9gatifs, de moments positifs ou de feu et du treillis sup\u00e9rieur \u2014 permettent d\u2019optimiser le comportement structurel et la durabilit\u00e9 du plancher collaborant. Les profils INCO 70.4, INCO 100.3 et INCO 100.3 R s\u2019adaptent \u00e0 diff\u00e9rentes configurations d\u2019armatures et d\u2019\u00e9paisseurs de dalle conform\u00e9ment \u00e0 la r\u00e9glementation. <\/p>\n","protected":false},"author":3,"featured_media":14116,"menu_order":15,"template":"","meta":{"_acf_changed":false},"categories":[1327],"tags":[],"class_list":["post-23450","guia-tecnica","type-guia-tecnica","status-publish","has-post-thumbnail","hentry","category-guides-techniques-pour-plancher-collaborant"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Types d\u2019armatures dans le plancher collaborant \u2013 INCOPERFIL<\/title>\n<meta name=\"description\" content=\"Les diff\u00e9rents types d\u2019armatures du plancher collaborant \u2014 armatures n\u00e9gatives, positives et treillis \u2014 garantissent la r\u00e9sistance et la durabilit\u00e9 du syst\u00e8me mixte.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/incoperfil.com\/fr\/guia-tecnica\/14-types-darmatures-dans-le-plancher-collaborant\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Types d\u2019armatures dans le plancher collaborant \u2013 INCOPERFIL\" \/>\n<meta property=\"og:description\" content=\"Les diff\u00e9rents types d\u2019armatures du plancher collaborant \u2014 armatures n\u00e9gatives, positives et treillis \u2014 garantissent la r\u00e9sistance et la durabilit\u00e9 du syst\u00e8me mixte.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/incoperfil.com\/fr\/guia-tecnica\/14-types-darmatures-dans-le-plancher-collaborant\/\" \/>\n<meta property=\"og:site_name\" content=\"INCOPERFIL\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-06T08:55:42+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/incoperfil.com\/wp-content\/uploads\/2024\/04\/7YC0957_re02-2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2000\" \/>\n\t<meta property=\"og:image:height\" content=\"695\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"TechArticle\",\"@id\":\"https:\\\/\\\/incoperfil.com\\\/fr\\\/guia-tecnica\\\/14-types-darmatures-dans-le-plancher-collaborant\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/incoperfil.com\\\/fr\\\/guia-tecnica\\\/14-types-darmatures-dans-le-plancher-collaborant\\\/\"},\"author\":{\"name\":\"arquitectura\",\"@id\":\"https:\\\/\\\/incoperfil.com\\\/fr\\\/#\\\/schema\\\/person\\\/b8bfc6f085f60fa29309768b0abeb4df\"},\"headline\":\"14. 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