{"id":23437,"date":"2026-04-27T08:44:45","date_gmt":"2026-04-27T06:44:45","guid":{"rendered":"https:\/\/incoperfil.com\/?post_type=guia-tecnica&#038;p=23437"},"modified":"2026-04-27T08:50:06","modified_gmt":"2026-04-27T06:50:06","slug":"comment-calculer-un-plancher-collaborant-tableaux-de-resistance-et-note-de-calcul","status":"publish","type":"guia-tecnica","link":"https:\/\/incoperfil.com\/fr\/guia-tecnica\/comment-calculer-un-plancher-collaborant-tableaux-de-resistance-et-note-de-calcul\/","title":{"rendered":"5. Comment calculer un plancher collaborant: tableaux de r\u00e9sistance et note de calcul"},"content":{"rendered":"<p data-start=\"713\" data-end=\"1237\">Le calcul d\u2019un plancher collaborant repose sur le comportement mixte entre l\u2019acier et le b\u00e9ton, o\u00f9 la t\u00f4le collaborante agit initialement comme coffrage et, apr\u00e8s durcissement du b\u00e9ton, comme armature de traction. Les normes de r\u00e9f\u00e9rence \u2014 UNE-EN 1993-1-3 (Eurocode 3) et UNE-EN 1994-1-1 (Eurocode 4) \u2014 \u00e9tablissent les crit\u00e8res de dimensionnement et de v\u00e9rification, tant en phase de coffrage qu\u2019en phase mixte, garantissant la s\u00e9curit\u00e9 structurelle et le respect des \u00e9tats limites ultimes et de service.<\/p>\n<p data-start=\"1239\" data-end=\"1411\">Cet article d\u00e9crit les phases de calcul et les outils disponibles, depuis les tableaux de r\u00e9sistance jusqu\u2019\u00e0 l\u2019\u00e9laboration d\u2019une note de calcul justificative.<\/p>\n<h2 data-start=\"1413\" data-end=\"1471\">Comment calculer un plancher collaborant : phase de coffrage<\/h2>\n<p data-start=\"1473\" data-end=\"1688\">Pendant l\u2019ex\u00e9cution, le profil collaborant doit supporter le poids du b\u00e9ton frais, les charges de chantier et l\u2019\u00e9ventuel effet d\u2019accumulation (effet de bassinage). Le dimensionnement \u00e0 ce stade exige la v\u00e9rification de la t\u00f4le selon :<\/p>\n<p style=\"padding-left: 40px;\" data-start=\"1690\" data-end=\"1771\"><strong data-start=\"1690\" data-end=\"1722\">\u00c9tats Limites Ultimes (ELU) :<\/strong> r\u00e9sistance en flexion, en cisaillement et au flambement local (voilement).<\/p>\n<p style=\"padding-left: 40px;\" data-start=\"1773\" data-end=\"1848\"><strong data-start=\"1773\" data-end=\"1809\">\u00c9tats Limites de Service (ELS)<\/strong>: fl\u00e8che maximale \u2264 L\/180 et \u2264 20 mm.<\/p>\n<p style=\"padding-left: 40px;\" data-start=\"1850\" data-end=\"2066\"><strong data-start=\"1850\" data-end=\"1877\">Effet de bassinage<\/strong>: lorsque la fl\u00e8che due au poids propre et au coulage du b\u00e9ton d\u00e9passe 1\/10 de l\u2019\u00e9paisseur de la dalle, une charge suppl\u00e9mentaire li\u00e9e \u00e0 l\u2019augmentation d\u2019\u00e9paisseur du b\u00e9ton est prise en compte.<\/p>\n<p data-start=\"2068\" data-end=\"2140\">Les charges de chantier adopt\u00e9es sont celles d\u00e9finies par la r\u00e9glementation :<\/p>\n<ul data-start=\"2142\" data-end=\"2276\">\n<li data-start=\"2142\" data-end=\"2183\">\n<p data-start=\"2144\" data-end=\"2183\">0,75 kN\/m\u00b2 uniform\u00e9ment r\u00e9partie.<\/p>\n<\/li>\n<li data-start=\"2184\" data-end=\"2276\">\n<p data-start=\"2186\" data-end=\"2276\">0,75 kN\/m\u00b2 localis\u00e9e sur une surface de 3 m au centre de trav\u00e9e et sur les appuis interm\u00e9diaires.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2278\" data-end=\"2423\">Ces v\u00e9rifications garantissent que la t\u00f4le collaborante fonctionne comme un coffrage stable et s\u00fbr, y compris dans des configurations sans \u00e9taiement.<\/p>\n<h2 data-start=\"2425\" data-end=\"2476\">Comment calculer un plancher collaborant : phase mixte<\/h2>\n<p data-start=\"2478\" data-end=\"2599\">Une fois le b\u00e9ton durci, le profil et la dalle travaillent conjointement comme une section mixte. \u00c0 ce stade, les v\u00e9rifications suivantes sont effectu\u00e9es :<\/p>\n<p style=\"padding-left: 40px;\" data-start=\"2601\" data-end=\"2677\"><strong data-start=\"2601\" data-end=\"2633\">\u00c9tats Limites Ultimes (ELU): <\/strong>r\u00e9sistance \u00e0 la flexion, au cisaillement et au glissement longitudinal.<\/p>\n<p style=\"padding-left: 40px;\" data-start=\"2679\" data-end=\"2718\"><strong data-start=\"2679\" data-end=\"2715\">\u00c9tats Limites de Service (ELS):<\/strong><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul data-start=\"2719\" data-end=\"2821\">\n<li data-start=\"2719\" data-end=\"2741\">\n<p data-start=\"2721\" data-end=\"2741\">L \u2264 3,50 m \u2192 L\/350<\/p>\n<\/li>\n<li data-start=\"2742\" data-end=\"2771\">\n<p data-start=\"2744\" data-end=\"2771\">L &gt; 3,50 m \u2192 L\/700 + 5 mm<\/p>\n<\/li>\n<li data-start=\"2772\" data-end=\"2821\">\n<p data-start=\"2774\" data-end=\"2821\">Avec rev\u00eatements fragiles \u2192 L\/700 y L\/1000 + 5 mm<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\" data-start=\"2823\" data-end=\"3147\"><strong data-start=\"2823\" data-end=\"2865\">R\u00e9sistance au feu (UNE-EN 1994-1-2):<\/strong> la capacit\u00e9 portante (R), l\u2019int\u00e9grit\u00e9 (E) et l\u2019isolation thermique (I) sont d\u00e9termin\u00e9es en fonction de l\u2019\u00e9paisseur de la dalle et de l\u2019armature inf\u00e9rieure sp\u00e9cifique pour le feu. Des classifications \u00e9lev\u00e9es peuvent \u00eatre atteintes sans protection suppl\u00e9mentaire projet\u00e9e, selon la configuration.<\/p>\n<h2 data-start=\"3149\" data-end=\"3184\">Utilisation des tableaux de r\u00e9sistance<\/h2>\n<p data-start=\"3186\" data-end=\"3382\">Les tableaux de calcul des profils collaborants d\u2019IncoPerfil constituent un outil pratique pour r\u00e9aliser une estimation pr\u00e9liminaire de la capacit\u00e9 portante avant une analyse d\u00e9taill\u00e9e.<\/p>\n<p data-start=\"3384\" data-end=\"3454\">Ces tableaux sont \u00e9tablis selon les hypoth\u00e8ses de combinaisons suivantes :<\/p>\n<ul>\n<li><strong>ELU: Q = 1,35\u00b7PP + 1,50\u00b7SU<\/strong><\/li>\n<li><strong>ELS: Q = 1,00\u00b7PP + 1,00\u00b7SU<\/strong><\/li>\n<\/ul>\n<p style=\"padding-left: 40px;\" data-start=\"3515\" data-end=\"3522\">O\u00f9 :<\/p>\n<p style=\"padding-left: 40px;\" data-start=\"3515\" data-end=\"3522\">PP : poids propre du plancher (acier + b\u00e9ton).<br data-start=\"3571\" data-end=\"3574\" \/>SU : surcharge d\u2019exploitation (kN\/m\u00b2).<\/p>\n<p data-start=\"3606\" data-end=\"3728\">Les valeurs d\u00e9pendent de l\u2019\u00e9paisseur de la t\u00f4le, de l\u2019\u00e9paisseur totale de la dalle, du nombre de trav\u00e9es et de la pr\u00e9sence ou non d\u2019un \u00e9taiement.<\/p>\n<p data-start=\"3730\" data-end=\"3749\">\u00c0 titre indicatif :<\/p>\n<ul data-start=\"3751\" data-end=\"4081\">\n<li data-start=\"3751\" data-end=\"3848\">\n<p data-start=\"3753\" data-end=\"3848\">INCO 70.4 Collaborant: port\u00e9es proches de 4 m sans \u00e9taiement dans des configurations courantes.<\/p>\n<\/li>\n<li data-start=\"3849\" data-end=\"3949\">\n<p data-start=\"3851\" data-end=\"3949\">INCO 100.3 Collaborant: port\u00e9es proches de 5 m sans \u00e9taiement dans certaines configurations.<\/p>\n<\/li>\n<li data-start=\"3950\" data-end=\"4081\">\n<p data-start=\"3952\" data-end=\"4081\">INCO 100.3 R Collaborant: solutions optimis\u00e9es pour des exigences de r\u00e9sistance au feu avec des port\u00e9es habituelles d\u2019environ 4 m, selon calcul.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4083\" data-end=\"4216\">Les tableaux permettent une pr\u00e9s\u00e9lection du profil le plus appropri\u00e9, qui devra ensuite \u00eatre v\u00e9rifi\u00e9 par un calcul complet.<\/p>\n<h2 data-start=\"4218\" data-end=\"4240\">Exemple indicatif de calcul \u00e0 l\u2019aide des tableaux<\/h2>\n<p data-start=\"4242\" data-end=\"4289\">Pour un plancher pr\u00e9sentant les conditions suivantes :<\/p>\n<ul data-start=\"4291\" data-end=\"4450\">\n<li data-start=\"4291\" data-end=\"4331\">\n<p data-start=\"4293\" data-end=\"4331\">Port\u00e9e de 3,5 m entre appuis (2 trav\u00e9es).<\/p>\n<\/li>\n<li data-start=\"4332\" data-end=\"4364\">\n<p data-start=\"4334\" data-end=\"4364\">Surcharge d\u2019exploitation = 5 kN\/m\u00b2.<\/p>\n<\/li>\n<li data-start=\"4365\" data-end=\"4399\">\n<p data-start=\"4367\" data-end=\"4399\">Exigence de r\u00e9sistance au feu REI 60.<\/p>\n<\/li>\n<li data-start=\"4400\" data-end=\"4450\">\n<p data-start=\"4402\" data-end=\"4450\">Profil INCO 100.3 Collaborant (\u00e9paisseur 1,00 mm).<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4452\" data-end=\"4618\">\u00c0 partir des tableaux, une solution compatible avec les exigences indiqu\u00e9es peut \u00eatre pr\u00e9s\u00e9lectionn\u00e9e, laquelle devra \u00eatre confirm\u00e9e par une v\u00e9rification structurelle compl\u00e8te.<\/p>\n<p data-start=\"4452\" data-end=\"4618\">R\u00e9sultat : le plancher satisfait aux exigences sans \u00e9taiement avec une dalle d\u2019\u00e9paisseur totale de 160 mm, treillis soud\u00e9 15x15x8, armatures positives \u00d88 mm (REI 60) et une surcharge d\u2019exploitation de 784 kg\/m\u00b2.<\/p>\n<h2 data-start=\"4620\" data-end=\"4665\">Note de calcul du plancher collaborant<\/h2>\n<p data-start=\"4667\" data-end=\"4873\">Pour la justification d\u00e9finitive, une note de calcul est \u00e9labor\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, les d\u00e9formations et la r\u00e9sistance au feu.<\/p>\n<p data-start=\"4875\" data-end=\"4929\">La demande de note de calcul requiert comme donn\u00e9es de base :<\/p>\n<ul data-start=\"4931\" data-end=\"5131\">\n<li data-start=\"4931\" data-end=\"4954\">\n<p data-start=\"4933\" data-end=\"4954\">Port\u00e9es entre appuis.<\/p>\n<\/li>\n<li data-start=\"4955\" data-end=\"4998\">\n<p data-start=\"4957\" data-end=\"4998\">Surcharge d\u2019exploitation et charges permanentes.<\/p>\n<\/li>\n<li data-start=\"4999\" data-end=\"5047\">\n<p data-start=\"5001\" data-end=\"5047\">Exigence de r\u00e9sistance au feu (REI).<\/p>\n<\/li>\n<li data-start=\"5048\" data-end=\"5080\">\n<p data-start=\"5050\" data-end=\"5080\">Type de structure d\u2019appui.<\/p>\n<\/li>\n<li data-start=\"5081\" data-end=\"5131\">\n<p data-start=\"5083\" data-end=\"5131\">Condition d\u2019ex\u00e9cution avec ou sans \u00e9taiement.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5133\" data-end=\"5238\">\u00c0 partir de ces informations, la solution optimale est d\u00e9termin\u00e9e et la justification technique correspondante est \u00e9mise. Acc\u00e9dez au formulaire de calcul du plancher collaborant.<\/p>\n<h2 data-start=\"5240\" data-end=\"5253\">Conclusion<\/h2>\n<p data-start=\"5255\" data-end=\"5620\">Le calcul d\u2019un plancher collaborant se d\u00e9veloppe en deux phases \u2014 coffrage et phase mixte \u2014 et requiert la v\u00e9rification des \u00e9tats limites, des d\u00e9formations et de la r\u00e9sistance au feu conform\u00e9ment \u00e0 la r\u00e9glementation europ\u00e9enne. Les tableaux de r\u00e9sistance permettent une estimation pr\u00e9liminaire efficace, tandis que la note technique garantit la validation structurelle compl\u00e8te pour chaque projet.<\/p>\n<h2 data-start=\"5352\" data-end=\"5383\">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>Le calcul du plancher collaborant peut \u00eatre abord\u00e9 de mani\u00e8re agile \u00e0 l\u2019aide des tableaux de r\u00e9sistance d\u2019Incoperfil, qui permettent d\u2019estimer le comportement du syst\u00e8me et de pr\u00e9s\u00e9lectionner le profil le plus appropri\u00e9 \u2014 INCO 70.4, INCO 100.3 ou INCO 100.3 R \u2014 avant de solliciter la note technique pour la justification structurelle d\u00e9finitive.<\/p>\n","protected":false},"author":3,"featured_media":14116,"menu_order":6,"template":"","meta":{"_acf_changed":false},"categories":[1327],"tags":[],"class_list":["post-23437","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 v27.3 - 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