{"id":2247,"date":"2026-04-27T12:40:31","date_gmt":"2026-04-27T12:40:31","guid":{"rendered":"https:\/\/protasoftware.com\/fr\/wiki\/regles-d-orientation-par-defaut-pour-les-elements-barres\/"},"modified":"2026-04-27T12:40:31","modified_gmt":"2026-04-27T12:40:31","slug":"regles-d-orientation-par-defaut-pour-les-elements-barres","status":"publish","type":"wiki","link":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/","title":{"rendered":"R\u00e8gles d’orientation par d\u00e9faut pour les \u00e9l\u00e9ments barres"},"content":{"rendered":"
\n Le syst\u00e8me de coordonn\u00e9es local de l’\u00e9l\u00e9ment barre<\/span><\/a><\/span> <\/span><\/span><\/span>est d\u00e9fini en deux \u00e9tapes. Il est d’abord form\u00e9 selon les r\u00e8gles d’orientation par d\u00e9faut. Il est ensuite tourn\u00e9 autour de l’axe local 1 selon l’angle de rotation, si celui-ci est pr\u00e9cis\u00e9.<\/span><\/span><\/span>
<\/span><\/span>\n<\/div>\n

Orientation par d\u00e9faut du syst\u00e8me de coordonn\u00e9es local de l’\u00e9l\u00e9ment barre<\/span><\/span><\/b><\/span>
<\/span><\/span><\/h2>\n
    \n
  • \n
    \n L’axe local 1 de l’\u00e9l\u00e9ment suit l’axe axial de l’\u00e9l\u00e9ment. Son origine se trouve au n\u0153ud de d\u00e9part.<\/span>
    <\/span><\/span>
    \n <\/span><\/div>\n<\/li>\n


    \n <\/span><\/p>\n


  • \n <\/span><\/p>\n

    \n <\/span>L’axe local 2 est orient\u00e9 comme suit :<\/span>
    <\/span><\/span>\n <\/div>\n
      \n
    • L’axe local 2 se trouve dans le plan form\u00e9 par l’axe local 1 et l’axe Z global, sauf si l’\u00e9l\u00e9ment (axe local 1) est parall\u00e8le \u00e0 l’axe Z global.
      <\/span><\/span><\/li>\n
    • L’axe local 2 est orient\u00e9 selon l’axe X positif si l’axe local 1 est parall\u00e8le \u00e0 l’axe Z global dans le sens positif.
      <\/span><\/span><\/li>\n
    • L’axe local 2 est orient\u00e9 selon l’axe X n\u00e9gatif si l’axe local 1 est parall\u00e8le \u00e0 l’axe Z global dans le sens n\u00e9gatif.
      <\/span><\/span><\/li>\n<\/ul>\n<\/li>\n
    • Enfin, l’axe local 3 est d\u00e9termin\u00e9 par le produit vectoriel de l’axe local 1 et de l’axe local 2.<\/span>
      <\/span><\/li>\n<\/ul>\n\n\n\n
      \n

      La proc\u00e9dure math\u00e9matique permettant de former les axes locaux de l’\u00e9l\u00e9ment barre selon la r\u00e8gle d’orientation par d\u00e9faut est r\u00e9sum\u00e9e ci-dessous :<\/span><\/span><\/span>
      <\/span><\/span><\/p>\n

        \n
      1. Soit<\/span><\/span> <\/span><\/span><\/span>V1<\/span><\/span><\/b>,<\/span><\/span> <\/span><\/span><\/span>V2<\/span><\/span><\/b> <\/span><\/span><\/span>et<\/span><\/span> <\/span><\/span><\/span>V3<\/span><\/span><\/b> <\/span><\/span><\/span>les vecteurs unitaires repr\u00e9sentant respectivement les axes locaux 1, 2 et 3 ; nous disposons aussi d’un vecteur unitaire auxiliaire,<\/span><\/span> <\/span><\/span><\/span>Vn<\/span><\/span> <\/span><\/span><\/span><\/b>dont la d\u00e9finition est expliqu\u00e9e dans la proc\u00e9dure suivante.
        <\/span><\/span><\/li>\n
      2. V1<\/span><\/span><\/b> <\/span><\/span><\/span>est le vecteur allant du n\u0153ud de d\u00e9part au n\u0153ud d’arriv\u00e9e.
        <\/span><\/span><\/li>\n
      3. \n
        \n Le vecteur<\/span><\/span> <\/span><\/span><\/span>Vn<\/span><\/span><\/b> <\/span><\/span><\/span>est d\u00e9fini comme suit :
        <\/span><\/span>\n <\/div>\n
          \n
        • [0, 0, 1] si l’axe local 1 n’est pas parall\u00e8le \u00e0 l’axe Z global.
          <\/span><\/span><\/li>\n
        • [1, 0, 0] si l’axe local 1 est orient\u00e9 selon l’axe Z positif du syst\u00e8me de coordonn\u00e9es global.
          <\/span><\/span><\/li>\n
        • [-1, 0, 0] si l’axe local 1 est orient\u00e9 selon l’axe Z n\u00e9gatif du syst\u00e8me de coordonn\u00e9es global.
          <\/span><\/span><\/li>\n<\/ul>\n<\/li>\n
        • Obtenir<\/span><\/span> <\/span><\/span><\/span>V3<\/span><\/span> <\/span><\/span><\/span><\/b>tel que<\/span><\/span> <\/span><\/span><\/span>V3 = V1<\/span><\/span><\/b> <\/span><\/span><\/span>x Vn<\/span><\/span><\/b>
          <\/span><\/span><\/li>\n
        • Obtenir<\/span><\/span> <\/span><\/span><\/span>V2<\/span><\/span><\/b> <\/span><\/span><\/span>tel que<\/span><\/span> <\/span><\/span><\/span>V2 = V3 x V1<\/span><\/span><\/b>
          <\/span><\/span><\/li>\n<\/ol>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          Angle de rotation<\/span><\/span><\/b><\/span>
          <\/span><\/span><\/h2>\n
          \n Les orientations des \u00e9l\u00e9ments barres qui diff\u00e8rent de l’orientation par d\u00e9faut sont d\u00e9finies \u00e0 l’aide de l’angle de rotation de l’\u00e9l\u00e9ment. Cet angle correspond \u00e0 la rotation des axes locaux 2 et 3 autour de l’axe local 1.<\/span><\/span><\/span>\n<\/div>\n
          \n <\/p>\n
          \n \"Remarque\"<\/p>\n
          \n Le sens de rotation suit la r\u00e8gle de la main droite. Autrement dit, si vous recourbez la main autour de l’axe local 1 en pointant le pouce vers le sens positif de cet axe, le sens de courbure des doigts indique le sens de rotation.\n <\/div>\n

          <\/span>\n <\/div>\n

          <\/span><\/span><\/span>\n<\/div>\n

          \n Les figures suivantes pr\u00e9sentent des \u00e9l\u00e9ments barres avec diff\u00e9rents angles de rotation et diff\u00e9rentes orientations selon la r\u00e8gle d’orientation par d\u00e9faut.<\/span><\/span><\/span>
          <\/span>\n<\/div>\n

          <\/span><\/span>
          <\/span><\/p>\n

          <\/p>\n

          \n \n<\/div>\n","protected":false},"excerpt":{"rendered":"

          Le syst\u00e8me de coordonn\u00e9es local de l’\u00e9l\u00e9ment barre est d\u00e9fini en deux \u00e9tapes. Il est d’abord form\u00e9 selon les r\u00e8gles d’orientation par d\u00e9faut. Il est ensuite…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"template":"","meta":{"_whitepaper_youtube_videos":"","_whitepaper_youtube_url":"","_whitepaper_youtube_thumbnail":"","footnotes":""},"categories":[40],"whitepaper_topic":[],"whitepaper_product":[],"whitepaper_type":[],"class_list":["post-2247","wiki","type-wiki","status-publish","hentry","category-modelling-detailing"],"yoast_head":"\nR\u00e8gles d'orientation par d\u00e9faut pour les \u00e9l\u00e9ments barres<\/title>\n<meta name=\"description\" content=\"ProtaStructure applique des r\u00e8gles d'orientation par d\u00e9faut aux \u00e9l\u00e9ments barres. Cet article d\u00e9taille la convention retenue pour les poutres et poteaux.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Prota Software\" \/>\n<meta property=\"og:description\" content=\"ProtaStructure applique des r\u00e8gles d'orientation par d\u00e9faut aux \u00e9l\u00e9ments barres. Cet article d\u00e9taille la convention retenue pour les poutres et poteaux.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/\" \/>\n<meta property=\"og:site_name\" content=\"Prota Software\" \/>\n<meta property=\"og:image\" content=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-40353d6f8d79ed0b0dd0ba8d0127f110.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Prota Software\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/protasoftware.com\\\/fr\\\/support\\\/manuels-techniques\\\/regles-d-orientation-par-defaut-pour-les-elements-barres\\\/\",\"url\":\"https:\\\/\\\/protasoftware.com\\\/fr\\\/support\\\/manuels-techniques\\\/regles-d-orientation-par-defaut-pour-les-elements-barres\\\/\",\"name\":\"R\u00e8gles d'orientation par d\u00e9faut pour les \u00e9l\u00e9ments barres\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/protasoftware.com\\\/fr\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/protasoftware.com\\\/fr\\\/support\\\/manuels-techniques\\\/regles-d-orientation-par-defaut-pour-les-elements-barres\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/protasoftware.com\\\/fr\\\/support\\\/manuels-techniques\\\/regles-d-orientation-par-defaut-pour-les-elements-barres\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/protasoftware.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/prota-doc-40353d6f8d79ed0b0dd0ba8d0127f110.png\",\"datePublished\":\"2026-04-27T12:40:31+00:00\",\"description\":\"ProtaStructure applique des r\u00e8gles d'orientation par d\u00e9faut aux \u00e9l\u00e9ments barres. Cet article d\u00e9taille la convention retenue pour les poutres et poteaux.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/protasoftware.com\\\/fr\\\/support\\\/manuels-techniques\\\/regles-d-orientation-par-defaut-pour-les-elements-barres\\\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/protasoftware.com\\\/fr\\\/support\\\/manuels-techniques\\\/regles-d-orientation-par-defaut-pour-les-elements-barres\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\\\/\\\/protasoftware.com\\\/fr\\\/support\\\/manuels-techniques\\\/regles-d-orientation-par-defaut-pour-les-elements-barres\\\/#primaryimage\",\"url\":\"https:\\\/\\\/protasoftware.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/prota-doc-40353d6f8d79ed0b0dd0ba8d0127f110.png\",\"contentUrl\":\"https:\\\/\\\/protasoftware.com\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/prota-doc-40353d6f8d79ed0b0dd0ba8d0127f110.png\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/protasoftware.com\\\/fr\\\/support\\\/manuels-techniques\\\/regles-d-orientation-par-defaut-pour-les-elements-barres\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\\\/\\\/protasoftware.com\\\/fr\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"R\u00e8gles d’orientation par d\u00e9faut pour les \u00e9l\u00e9ments barres\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/protasoftware.com\\\/fr\\\/#website\",\"url\":\"https:\\\/\\\/protasoftware.com\\\/fr\\\/\",\"name\":\"Prota Software\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/protasoftware.com\\\/fr\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"R\u00e8gles d'orientation par d\u00e9faut pour les \u00e9l\u00e9ments barres","description":"ProtaStructure applique des r\u00e8gles d'orientation par d\u00e9faut aux \u00e9l\u00e9ments barres. Cet article d\u00e9taille la convention retenue pour les poutres et poteaux.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/","og_locale":"fr_FR","og_type":"article","og_title":"Prota Software","og_description":"ProtaStructure applique des r\u00e8gles d'orientation par d\u00e9faut aux \u00e9l\u00e9ments barres. Cet article d\u00e9taille la convention retenue pour les poutres et poteaux.","og_url":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/","og_site_name":"Prota Software","og_image":[{"url":"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-40353d6f8d79ed0b0dd0ba8d0127f110.png","type":"","width":"","height":""}],"twitter_card":"summary_large_image","twitter_title":"Prota Software","twitter_misc":{"Dur\u00e9e de lecture estim\u00e9e":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/","url":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/","name":"R\u00e8gles d'orientation par d\u00e9faut pour les \u00e9l\u00e9ments barres","isPartOf":{"@id":"https:\/\/protasoftware.com\/fr\/#website"},"primaryImageOfPage":{"@id":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/#primaryimage"},"image":{"@id":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/#primaryimage"},"thumbnailUrl":"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-40353d6f8d79ed0b0dd0ba8d0127f110.png","datePublished":"2026-04-27T12:40:31+00:00","description":"ProtaStructure applique des r\u00e8gles d'orientation par d\u00e9faut aux \u00e9l\u00e9ments barres. Cet article d\u00e9taille la convention retenue pour les poutres et poteaux.","breadcrumb":{"@id":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/#primaryimage","url":"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-40353d6f8d79ed0b0dd0ba8d0127f110.png","contentUrl":"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-40353d6f8d79ed0b0dd0ba8d0127f110.png"},{"@type":"BreadcrumbList","@id":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/regles-d-orientation-par-defaut-pour-les-elements-barres\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/protasoftware.com\/fr\/"},{"@type":"ListItem","position":2,"name":"R\u00e8gles d’orientation par d\u00e9faut pour les \u00e9l\u00e9ments barres"}]},{"@type":"WebSite","@id":"https:\/\/protasoftware.com\/fr\/#website","url":"https:\/\/protasoftware.com\/fr\/","name":"Prota Software","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/protasoftware.com\/fr\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"}]}},"_links":{"self":[{"href":"https:\/\/protasoftware.com\/fr\/wp-json\/wp\/v2\/wiki\/2247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/protasoftware.com\/fr\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/protasoftware.com\/fr\/wp-json\/wp\/v2\/types\/wiki"}],"author":[{"embeddable":true,"href":"https:\/\/protasoftware.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":0,"href":"https:\/\/protasoftware.com\/fr\/wp-json\/wp\/v2\/wiki\/2247\/revisions"}],"wp:attachment":[{"href":"https:\/\/protasoftware.com\/fr\/wp-json\/wp\/v2\/media?parent=2247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/protasoftware.com\/fr\/wp-json\/wp\/v2\/categories?post=2247"},{"taxonomy":"whitepaper_topic","embeddable":true,"href":"https:\/\/protasoftware.com\/fr\/wp-json\/wp\/v2\/whitepaper_topic?post=2247"},{"taxonomy":"whitepaper_product","embeddable":true,"href":"https:\/\/protasoftware.com\/fr\/wp-json\/wp\/v2\/whitepaper_product?post=2247"},{"taxonomy":"whitepaper_type","embeddable":true,"href":"https:\/\/protasoftware.com\/fr\/wp-json\/wp\/v2\/whitepaper_type?post=2247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}