{"id":208,"date":"2024-07-25T15:27:48","date_gmt":"2024-07-25T15:27:48","guid":{"rendered":"https:\/\/protasoftware.com\/fr\/blog\/calcul-des-treillis-tridimensionnels-avec-protastructure\/"},"modified":"2026-09-14T08:44:46","modified_gmt":"2026-09-14T08:44:46","slug":"calcul-des-treillis-tridimensionnels-avec-protastructure","status":"publish","type":"post","link":"https:\/\/protasoftware.com\/fr\/blog\/calcul-des-treillis-tridimensionnels-avec-protastructure\/","title":{"rendered":"Calculer des treillis tridimensionnels avec ProtaStructure : le guide complet"},"content":{"rendered":"<p>Les treillis tridimensionnels occupent une place essentielle dans l\u2019architecture et l\u2019ing\u00e9nierie contemporaines : ils allient stabilit\u00e9, polyvalence et efficacit\u00e9. ProtaStructure, solution logicielle compl\u00e8te pour l\u2019ing\u00e9nierie structurelle, propose un ensemble d\u2019outils \u00e9tendu pour les mod\u00e9liser, les analyser et les calculer. Ce guide d\u00e9taille les fonctions d\u00e9di\u00e9es aux treillis tridimensionnels et leur application \u00e0 des projets r\u00e9els.<\/p>\n<h3>Comprendre les treillis tridimensionnels<\/h3>\n<p>Un treillis tridimensionnel est une ossature en trois dimensions compos\u00e9e de barres interconnect\u00e9es, con\u00e7ue pour reprendre des charges complexes. Contrairement aux treillis plans, qui se d\u00e9veloppent dans un seul plan, il s\u2019\u00e9tend dans les trois directions et offre ainsi une rigidit\u00e9 et une r\u00e9partition des charges sup\u00e9rieures. On le rencontre couramment dans les grandes structures \u2014 b\u00e2timents m\u00e9talliques, ponts, couvertures \u2014 en raison de sa l\u00e9g\u00e8ret\u00e9 associ\u00e9e \u00e0 une forte r\u00e9sistance.<\/p>\n<p>Le <strong>Mus\u00e9e des sciences de Valence<\/strong>, sign\u00e9 par l\u2019architecte <strong>Santiago Calatrava<\/strong>, en offre un exemple remarquable : les <strong>treillis tridimensionnels g\u00e9ants<\/strong> y sont laiss\u00e9s apparents et r\u00e9v\u00e8lent tout leur int\u00e9r\u00eat <strong>structurel<\/strong> comme <strong>esth\u00e9tique<\/strong>.<\/p>\n<p>L\u2019unit\u00e9 de base d\u2019un treillis tridimensionnel est le <strong>t\u00e9tra\u00e8dre<\/strong>, une <strong>forme 3D<\/strong> simple obtenue en reliant trois \u00e9l\u00e9ments suppl\u00e9mentaires \u00e0 trois n\u0153uds existants. La r\u00e9p\u00e9tition de ce <strong>motif g\u00e9om\u00e9trique<\/strong> engendre les vastes <strong>ossatures<\/strong> que l\u2019on observe dans la <strong>construction<\/strong>.<\/p>\n<figure id=\"attachment_234\" aria-describedby=\"caption-attachment-234\" style=\"width: 2560px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-234 size-full\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/sites\/5\/2026\/09\/av_imagen-scaled-1.webp\" alt=\"Mus\u00e9e des sciences de Valence \u2013 Santiago Calatrava\" width=\"2560\" height=\"1162\" srcset=\"https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/av_imagen-scaled-1.webp 1920w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/av_imagen-scaled-1-300x136.webp 300w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/av_imagen-scaled-1-1024x465.webp 1024w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/av_imagen-scaled-1-768x349.webp 768w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/av_imagen-scaled-1-1536x698.webp 1536w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><figcaption id=\"caption-attachment-234\" class=\"wp-caption-text\">Mus\u00e9e des sciences de Valence \u2013 Santiago Calatrava<\/figcaption><\/figure>\n<figure id=\"attachment_235\" aria-describedby=\"caption-attachment-235\" style=\"width: 2523px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-235 size-full\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/sites\/5\/2026\/09\/av_80127.webp\" alt=\"Treillis tridimensionnels dans l\u2019\u0153uvre de Santiago Calatrava\" width=\"2523\" height=\"2522\" srcset=\"https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/av_80127.webp 1920w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/av_80127-300x300.webp 300w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/av_80127-1024x1024.webp 1024w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/av_80127-150x150.webp 150w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/av_80127-768x768.webp 768w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/av_80127-1536x1536.webp 1536w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/av_80127-1080x1080.webp 1080w\" sizes=\"auto, (max-width: 2523px) 100vw, 2523px\" \/><figcaption id=\"caption-attachment-235\" class=\"wp-caption-text\">Treillis tridimensionnels dans l\u2019\u0153uvre de Santiago Calatrava<\/figcaption><\/figure>\n<p><em>La trame triangulaire r\u00e9p\u00e9t\u00e9e, visible en toiture comme en fa\u00e7ade, soutient de grandes port\u00e9es et forme une structure rigide et stable. Ce parti pris caract\u00e9rise le travail de Santiago Calatrava, qui associe qualit\u00e9 plastique et efficacit\u00e9 structurelle.<\/em><\/p>\n<h3>Les fonctions cl\u00e9s de ProtaStructure pour les treillis tridimensionnels<\/h3>\n<p>ProtaStructure 2025 apporte plusieurs fonctions avanc\u00e9es de mod\u00e9lisation des treillis tridimensionnels, qui rendent la cr\u00e9ation d\u2019ossatures m\u00e9talliques complexes plus intuitive et plus rapide.<\/p>\n<figure id=\"attachment_236\" aria-describedby=\"caption-attachment-236\" style=\"width: 811px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-236 size-full\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/sites\/5\/2026\/09\/Screenshot-2024-07-25-at-17.52.37.jpg\" alt=\"Calculer des treillis tridimensionnels avec ProtaStructure\" width=\"811\" height=\"382\" srcset=\"https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/Screenshot-2024-07-25-at-17.52.37.jpg 811w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/Screenshot-2024-07-25-at-17.52.37-300x141.jpg 300w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/Screenshot-2024-07-25-at-17.52.37-768x362.jpg 768w\" sizes=\"auto, (max-width: 811px) 100vw, 811px\" \/><figcaption id=\"caption-attachment-236\" class=\"wp-caption-text\">Calculer des treillis tridimensionnels avec ProtaStructure<\/figcaption><\/figure>\n<h3>Ins\u00e9rer un treillis tridimensionnel<\/h3>\n<p>Pour ins\u00e9rer un treillis tridimensionnel dans ProtaStructure :<\/p>\n<ol>\n<li><strong>Choix de la commande<\/strong> : s\u00e9lectionnez la commande Space Truss dans l\u2019onglet Modeling &gt; Steel Members du ruban.<\/li>\n<li><strong>Zone de trac\u00e9<\/strong> : dessinez la zone rectangulaire qui accueillera le treillis.<\/li>\n<li><strong>Contr\u00f4le des param\u00e8tres<\/strong> : l\u2019\u00e9diteur param\u00e9trique Space Truss Editor r\u00e8gle les param\u00e8tres des surfaces sup\u00e9rieure et inf\u00e9rieure, les profil\u00e9s acier, les charges r\u00e9parties et la trame du treillis.<\/li>\n<\/ol>\n<figure id=\"attachment_237\" aria-describedby=\"caption-attachment-237\" style=\"width: 807px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-237 size-full\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/sites\/5\/2026\/09\/Screenshot-2024-07-25-at-17.54.13.png\" alt=\"Ins\u00e9rer un treillis tridimensionnel\" width=\"807\" height=\"114\" srcset=\"https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/Screenshot-2024-07-25-at-17.54.13.png 807w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/Screenshot-2024-07-25-at-17.54.13-300x42.png 300w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/Screenshot-2024-07-25-at-17.54.13-768x108.png 768w\" sizes=\"auto, (max-width: 807px) 100vw, 807px\" \/><figcaption id=\"caption-attachment-237\" class=\"wp-caption-text\">Ins\u00e9rer un treillis tridimensionnel<\/figcaption><\/figure>\n<h3>Types de trame et formes de surface<\/h3>\n<p>ProtaStructure permet de cr\u00e9er des treillis tridimensionnels aux surfaces et aux trames vari\u00e9es :<\/p>\n<ul>\n<li><strong>Types de trame<\/strong> : motif d\u00e9croissant (Reducing) ou croissant (Increasing) pour les surfaces du treillis.<\/li>\n<li><strong>Formes de surface<\/strong> : surfaces planes, cylindriques ou sph\u00e9riques selon les contraintes de conception. Chacune se personnalise ensuite selon les besoins du projet.<\/li>\n<\/ul>\n<figure id=\"attachment_238\" aria-describedby=\"caption-attachment-238\" style=\"width: 204px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-238 size-full\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/sites\/5\/2026\/09\/Screenshot-2024-07-25-at-17.55.46.webp\" alt=\"Treillis tridimensionnel \u2013 type de trame\" width=\"204\" height=\"169\"><figcaption id=\"caption-attachment-238\" class=\"wp-caption-text\">Treillis tridimensionnel \u2013 type de trame<\/figcaption><\/figure>\n<figure id=\"attachment_239\" aria-describedby=\"caption-attachment-239\" style=\"width: 637px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-239 size-full\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/sites\/5\/2026\/09\/Screenshot-2024-07-25-at-17.56.04.webp\" alt=\"Treillis tridimensionnel \u2013 forme des surfaces sup\u00e9rieure et inf\u00e9rieure\" width=\"637\" height=\"232\" srcset=\"https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/Screenshot-2024-07-25-at-17.56.04.webp 637w, https:\/\/protasoftware.com\/fr\/wp-content\/uploads\/sites\/5\/2026\/09\/Screenshot-2024-07-25-at-17.56.04-300x109.webp 300w\" sizes=\"auto, (max-width: 637px) 100vw, 637px\" \/><figcaption id=\"caption-attachment-239\" class=\"wp-caption-text\">Treillis tridimensionnel \u2013 forme des surfaces sup\u00e9rieure et inf\u00e9rieure<\/figcaption><\/figure>\n<h3>R\u00e9gler la trame et les d\u00e9calages<\/h3>\n<p>Le logiciel permet de d\u00e9finir le nombre de modules de trame (triangles du treillis) en lignes et en colonnes. L\u2019ensemble du treillis peut \u00e9galement \u00eatre d\u00e9cal\u00e9 selon l\u2019axe Z, ce qui laisse toute latitude pour le positionner et l\u2019aligner dans la structure.<\/p>\n<h3>Changer les profil\u00e9s acier<\/h3>\n<p>ProtaStructure simplifie le choix et la modification des profil\u00e9s acier des barres du treillis. Le bouton Section, sous l\u2019onglet Loads, donne acc\u00e8s aux profil\u00e9s adapt\u00e9s, afin que le treillis r\u00e9ponde aux sp\u00e9cifications et aux normes applicables.<\/p>\n<h3>Appliquer les charges<\/h3>\n<p>Le poids propre des barres est calcul\u00e9 automatiquement par ProtaStructure. Des champs permettent d\u2019ajouter des charges r\u00e9parties compl\u00e9mentaires, indispensables \u00e0 une analyse fid\u00e8le de la r\u00e9partition des charges. Plusieurs types de charges peuvent \u00eatre d\u00e9finis :<\/p>\n<ul>\n<li><strong>Charges permanentes<\/strong> : charges fixes suppl\u00e9mentaires, rev\u00eatements notamment.<\/li>\n<li><strong>Charges d\u2019exploitation<\/strong> : charges variables dans le temps, occupants et mobilier par exemple.<\/li>\n<li><strong>Charges d\u2019exploitation en toiture, charges de neige et de pluie<\/strong> : actives d\u00e8s que les cas de charge correspondants sont d\u00e9finis dans l\u2019\u00e9diteur de combinaisons.<\/li>\n<\/ul>\n<h5>L\u2019\u00e9diteur de charges pour une application d\u00e9taill\u00e9e<\/h5>\n<p>Pour les applications plus fines, l\u2019\u00e9diteur de charges de ProtaStructure permet de :<\/p>\n<ol>\n<li>s\u00e9lectionner le treillis \u00e0 l\u2019\u00e9cran ;<\/li>\n<li>utiliser la commande Edit Loads pour affecter des charges surfaciques r\u00e9parties ou des charges ponctuelles \u00e0 des zones ou des n\u0153uds pr\u00e9cis, sous diff\u00e9rents cas de charge.<\/li>\n<\/ol>\n<h3>Prolonger les poteaux jusqu\u2019aux treillis tridimensionnels<\/h3>\n<p>ProtaStructure g\u00e8re aussi l\u2019int\u00e9gration des treillis tridimensionnels aux autres \u00e9l\u00e9ments structurels. Les poteaux existants peuvent \u00eatre prolong\u00e9s pour rejoindre le treillis, ce qui facilite la cr\u00e9ation d\u2019appuis interm\u00e9diaires et assure la continuit\u00e9 structurelle.<\/p>\n<h3>Calcul des treillis tridimensionnels<\/h3>\n<p>Une fois le treillis mod\u00e9lis\u00e9 et analys\u00e9, le calcul se d\u00e9roule ainsi :<\/p>\n<ol>\n<li>s\u00e9lectionner l\u2019\u00e9l\u00e9ment treillis ;<\/li>\n<li>lancer la commande Steel Member Design pour v\u00e9rifier et calculer toutes les barres ;<\/li>\n<li>exploiter l\u2019interface de calcul multithread, qui mobilise tous les c\u0153urs du processeur.<\/li>\n<\/ol>\n<p>ProtaStructure calcule les barres du treillis, mais ne traite pas encore le calcul des n\u0153uds \u00e0 rotule.<\/p>\n<h4>Conclusion<\/h4>\n<p>Les capacit\u00e9s de ProtaStructure en mati\u00e8re de treillis tridimensionnels offrent aux ing\u00e9nieurs structure des outils puissants pour concevoir des ossatures efficaces, polyvalentes et robustes. En automatisant une grande partie du calcul et de l\u2019analyse, le logiciel laisse davantage de place \u00e0 l\u2019innovation et \u00e0 la pr\u00e9cision.<\/p>\n<p>Pour en savoir plus sur le calcul des treillis tridimensionnels avec ProtaStructure, nous vous invitons \u00e0 parcourir notre <a href=\"https:\/\/protasoftware.com\/community\/\">site<\/a>.<\/p>\n<p>Consultez \u00e9galement nos <a href=\"https:\/\/protasoftware.com\/support\/technical-manuals\/\">manuels techniques<\/a> pour des explications d\u00e9taill\u00e9es et d\u00e9couvrez comment calculer des treillis tridimensionnels simplement et en toute s\u00e9curit\u00e9.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Les treillis tridimensionnels occupent une place essentielle dans l\u2019architecture et l\u2019ing\u00e9nierie contemporaines : ils allient stabilit\u00e9, polyvalence et efficacit\u00e9. ProtaStructure, solution logicielle compl\u00e8te pour l\u2019ing\u00e9nierie&hellip;<\/p>\n","protected":false},"author":1,"featured_media":209,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_whitepaper_youtube_videos":"","_whitepaper_youtube_url":"","_whitepaper_youtube_thumbnail":"","footnotes":""},"categories":[3],"tags":[],"content_topic":[],"content_product":[],"content_region":[],"whitepaper_topic":[],"whitepaper_product":[],"whitepaper_type":[],"class_list":["post-208","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.9 (Yoast SEO v27.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Calculer des treillis tridimensionnels avec ProtaStructure<\/title>\n<meta name=\"description\" content=\"Apprenez \u00e0 calculer facilement des treillis tridimensionnels avec 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