{"id":2151,"date":"2026-04-27T12:11:16","date_gmt":"2026-04-27T12:11:16","guid":{"rendered":"https:\/\/protasoftware.com\/fr\/wiki\/exemple-de-poutre-courbe-de-rampe-circulaire\/"},"modified":"2026-04-27T12:11:16","modified_gmt":"2026-04-27T12:11:16","slug":"exemple-de-poutre-courbe-de-rampe-circulaire","status":"publish","type":"wiki","link":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/exemple-de-poutre-courbe-de-rampe-circulaire\/","title":{"rendered":"Exemple de poutre courbe de rampe circulaire"},"content":{"rendered":"<div><span class=\"colour\">Vous pouvez mod\u00e9liser une poutre de rampe \/ poutre annulaire. La dalle de rampe circulaire\/h\u00e9lico\u00efdale d\u00e9passe le cadre du logiciel.&nbsp; Une mod\u00e9lisation d&rsquo;exemple est jointe, \u00e0 titre de r\u00e9f\u00e9rence uniquement.&nbsp;<\/span><\/div>\n<div>\n<div><span style=\"margin: 10px 0px;position: relative;padding: 10px 10px 10px 40px\" class=\"KB_New_Editor_Highlights\"><img decoding=\"async\" alt=\"Idea\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-aaecb513c34e1fea09d79c8a7fdebec8.png\" data-type=\"non-resize\" style=\"position: absolute;left: 12px;top: 14px;width: 15px;max-width: 100%\" data-image=\"contentStyle\"> <\/p>\n<div><span class=\"colour\">En g\u00e9n\u00e9ral, il est recommand\u00e9 de s\u00e9parer le mod\u00e8le de la&nbsp; rampe circulaire \/ escalier h\u00e9lico\u00efdal du mod\u00e8le principal du b\u00e2timent, si possible. Cela sera plus productif, car la configuration, l&rsquo;analyse et le d\u00e9pannage seront facilit\u00e9s.<br \/><\/span><\/div>\n<div><span class=\"colour\">Il n&rsquo;est <u>pas<\/u> possible de mod\u00e9liser des dalles inclin\u00e9es support\u00e9es par des poutres h\u00e9lico\u00efdales \/ courbes, car la dalle ne sera pas parfaitement plane, et les charges de la dalle ne peuvent donc pas \u00eatre correctement prises en compte. Ces charges doivent donc \u00eatre calcul\u00e9es s\u00e9par\u00e9ment et saisies sur les poutres courbes via <a href=\"https:\/\/support.protasoftware.com\/portal\/en\/kb\/articles\/load-editor-ps2022\" target=\"_blank\" rel=\"noopener noreferrer\">Modifier les charges<\/a>.&nbsp;<\/span><\/div>\n<p><\/span><\/div>\n<div><span><span class=\"colour\">Voici les \u00e9tapes g\u00e9n\u00e9rales pour mod\u00e9liser la poutre de rampe circulaire :<\/span><\/span><\/div>\n<\/div>\n<div><span class=\"colour\">1. Tracez quelques axes courbes (par exemple 4 axes) pour former un cercle (voir la capture ci-dessous). Selon la disposition du projet, vous pouvez diviser le cercle en davantage de segments d&rsquo;axes courbes.<\/span> <\/div>\n<div><\/div>\n<div><img decoding=\"async\" data-zdeskdocselectedclass=\"original\" data-zdeskdocid=\"img_0947163563278055\" class=\"docsimage currimg\" style=\"padding: 0px;max-width: 100%\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-870061e2608c.png\"> <\/div>\n<div><\/div>\n<div><span class=\"colour\">2. Tracez tous les poteaux et saisissez les valeurs Del-Z correspondantes.&nbsp;<\/span><\/div>\n<div>\n<div><span class=\"KB_New_Editor_Highlights\" style=\"margin: 10px 0px;position: relative;padding: 10px 10px 10px 40px\"><img decoding=\"async\" alt=\"Notes\" data-image=\"contentStyle\" style=\"position: absolute;left: 12px;top: 14px;width: 15px\" data-type=\"non-resize\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-03cc6fd1f44dc3dcc7493ef192474b46.png\"><\/p>\n<div><span class=\"colour\">Vous pouvez d&rsquo;abord ignorer la saisie de la valeur Del-Z du poteau. Vous pourrez le faire plus tard, apr\u00e8s l&rsquo;ajustement des Del-Z des poutres.<\/span><\/div>\n<p><\/span><\/div>\n<p>&nbsp; <\/p>\n<div><\/div>\n<\/div>\n<div>&nbsp; &nbsp; &nbsp;&nbsp; <\/p>\n<div id=\"target_mov_img_5482333378534898\" class=\"target_moving\"><img decoding=\"async\" data-zdeskdocselectedclass=\"original\" data-zdeskdocid=\"img_5482333378534898\" class=\"docsimage\" style=\"padding: 0px;max-width: 100%\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-3d659d68f957.png\"><\/div>\n<div class=\"target_moving\"><\/div>\n<\/div>\n<div><span class=\"colour\">3. Tracez les poutres courbes et saisissez la valeur Del-Z correspondante. Vous pouvez ouvrir la vue 3D et la vue en plan c\u00f4te \u00e0 c\u00f4te pour v\u00e9rifier que la valeur Del-Z est correctement attribu\u00e9e.&nbsp;<\/span><\/div>\n<div><\/div>\n<div><img decoding=\"async\" style=\"padding: 0px;max-width: 100%\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-7591918b4a5c.jpg\"><\/div>\n<div>&nbsp; &nbsp;<\/p>\n<div><span style=\"margin: 10px 0px;position: relative;padding: 10px 10px 10px 40px\" class=\"KB_New_Editor_Highlights\"><img decoding=\"async\" alt=\"Notes\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-03cc6fd1f44dc3dcc7493ef192474b46.png\" data-type=\"non-resize\" style=\"position: absolute;left: 12px;top: 14px;width: 15px;max-width: 100%\" data-image=\"contentStyle\"> <\/p>\n<div><span class=\"colour\">&nbsp;Comment diff\u00e9rencier l&rsquo;extr\u00e9mit\u00e9 i et l&rsquo;extr\u00e9mit\u00e9 j d&rsquo;une poutre, comme illustr\u00e9 ci-dessous.<\/span><\/div>\n<div><span class=\"colour\">La s\u00e9lection de la poutre affichera \u00e9galement les symboles I et J \u00e0 l&rsquo;\u00e9cran&nbsp;<\/span>&nbsp;<\/div>\n<p><\/span><\/div>\n<div>\n<div class=\"target_moving\" id=\"target_mov_img_019837461462158368\"><img decoding=\"async\" style=\"max-width: 100%;padding: 0px;height: auto\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-082e410248d14db2f7b1df8e0d02d30c.png\" data-zdeskdocid=\"img_019837461462158368\" class=\"docsimage\" data-zdeskdocselectedclass=\"original\"><\/div>\n<div><span>&nbsp; &nbsp; &nbsp;&nbsp;<\/span><\/div>\n<\/div>\n<\/div>\n<div><span class=\"colour\">4. Saisissez la valeur Del-Z correspondante pour les poteaux si vous les avez ignor\u00e9s \u00e0 l&rsquo;\u00e9tape (2).&nbsp;<\/span><\/div>\n<div class=\" align-left\" style=\"text-align: left\"><span class=\"font\"><span class=\"size\" style=\"font-size: 16px\"><span class=\"colour\"><span class=\"highlight\">5. Affichez et v\u00e9rifiez progressivement le mod\u00e8le analytique pour vous assurer que le filaire des \u00e9l\u00e9ments est bien connect\u00e9&nbsp; :&nbsp;<\/span><\/span><\/span><\/span><\/div>\n<blockquote class=\"zde_indent\">\n<div class=\" align-left\" style=\"text-align: left\"><span class=\"font\"><span class=\"size\" style=\"font-size: 16px\"><span class=\"colour\"><span class=\"highlight\">a.&nbsp; Cr\u00e9ez une vue 3D &gt;&nbsp; Par d\u00e9faut, un mod\u00e8le \u00ab Solide \u00bb ou \u00ab Rendu \u00bb est affich\u00e9&nbsp;<\/span><\/span><\/span><\/span><\/div>\n<div class=\" align-left\" style=\"text-align: left\"><span class=\"font\"><span class=\"size\" style=\"font-size: 16px\"><span class=\"colour\"><span class=\"highlight\">b.&nbsp; Appuyez cons\u00e9cutivement sur \u00ab <b>CTRL + D<\/b> \u00bb&nbsp; &gt; cela fera d\u00e9filer les diff\u00e9rents styles d&rsquo;affichage (Rendu, Plat, Ligne cach\u00e9e, Lin\u00e9aire)<\/span><\/span><\/span><\/span><\/div>\n<div class=\" align-left\" style=\"text-align: left\"><span class=\"font\"><span class=\"size\" style=\"font-size: 16px\"><span class=\"colour\"><span class=\"highlight\">c.&nbsp; Assurez-vous que \u00ab <b>Lin\u00e9aire<\/b> \u00bb est actif &gt; c&rsquo;est le mod\u00e8le filaire analytique 3D&nbsp;<\/span><\/span><\/span><\/span><\/div>\n<div class=\" align-left\" style=\"text-align: left\"><span class=\"font\"><span class=\"size\" style=\"font-size: 16px\"><span class=\"colour\"><span class=\"highlight\">d.&nbsp; V\u00e9rifiez que les \u00e9l\u00e9ments sont correctement connect\u00e9s en zoomant sur les n\u0153uds d&rsquo;int\u00e9r\u00eat (en zoomant sur le n\u0153ud d&rsquo;int\u00e9r\u00eat.<\/span><\/span><\/span><\/span><\/div>\n<div class=\" align-left\" style=\"text-align: left\"><span class=\"font\"><span class=\"size\" style=\"font-size: 16px\"><span class=\"colour\"><span class=\"highlight\">Voici un exemple o\u00f9 les \u00e9l\u00e9ments ne sont pas connect\u00e9s analytiquement mais semblent connect\u00e9s en vue rendue solide.&nbsp;<\/span><\/span><\/span><\/span><\/div>\n<\/blockquote>\n<div><\/div>\n<div><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-89afea780e983ce9a77e6ed746492a80.png\" style=\"max-width: 100%;height: auto;padding: 0\"><\/div>\n<div><\/div>\n<div><span class=\"colour\">6. Ex\u00e9cutez l&rsquo;Analyse du b\u00e2timent et v\u00e9rifiez la connectivit\u00e9 des \u00e9l\u00e9ments entre les poteaux et les poutres une fois l&rsquo;Analyse du b\u00e2timent termin\u00e9e.&nbsp;<\/span><\/div>\n<ol>\n<li style=\"list-style-type: disc\"><span class=\"colour\">Allez dans l&rsquo;onglet Analyse &gt; <a target=\"_blank\" href=\"https:\/\/support.protasoftware.com\/portal\/en\/kb\/articles\/post-analysis-ps-2022\" rel=\"noopener noreferrer\"><u>Mod\u00e8le analytique<\/u> <\/a>&gt; G\u00e9n\u00e9ral, cliquez sur \u00ab <b>Probl\u00e8me de connectivit\u00e9<\/b> \u00bb pour v\u00e9rifier la connectivit\u00e9 des \u00e9l\u00e9ments.&nbsp;<\/span><\/li>\n<li style=\"list-style-type: disc\"><span class=\"colour\">V\u00e9rifiez que le d\u00e9placement des \u00e9l\u00e9ments est raisonnable, car les d\u00e9placements refl\u00e8tent directement les efforts internes des \u00e9l\u00e9ments. Si le d\u00e9placement est d\u00e9raisonnable, les efforts des \u00e9l\u00e9ments sont donc erron\u00e9s.&nbsp;<\/span><\/li>\n<li style=\"list-style-type: disc\"><span class=\"colour\">Reportez-vous \u00e0 toutes les indications pr\u00e9sent\u00e9es dans cette vid\u00e9o de formation en ligne :&nbsp;<\/span><a target=\"_blank\" href=\"https:\/\/www.youtube.com\/watch?v=NVNsrmQp5dw&amp;list=PLK6L9NVEbzK87yz-ZPQvAck3iXzz6YBbW&amp;index=16\" rel=\"noopener noreferrer\"><u>15 \u2013 Processus post-analyse et mod\u00e8le analytique<\/u><\/a>.&nbsp;<\/li>\n<\/ol>\n<div>\n<div><span class=\"KB_New_Editor_Highlights\" style=\"margin: 10px 0px;position: relative;padding: 10px 10px 10px 40px\"><img decoding=\"async\" alt=\"Notes\" data-image=\"contentStyle\" style=\"position: absolute;left: 12px;top: 14px;width: 15px\" data-type=\"non-resize\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-f275d5ce20be4e8a1986740a26917da7.png\"><\/p>\n<div><span class=\"colour\">Par d\u00e9faut, la raideur en torsion de la poutre peut \u00eatre r\u00e9gl\u00e9e \u00e0 <\/span><b><span class=\"colour\">0,01 = 1 %<\/span><\/b><span class=\"colour\">&nbsp;dans <\/span><a target=\"_blank\" href=\"https:\/\/support.protasoftware.com\/portal\/en\/kb\/articles\/model-options#Material_and_Section_Effective_Stiffness_Factors\" rel=\"noopener noreferrer\"><u>Facteurs de raideur effective des mat\u00e9riaux et sections<\/u><\/a>. <\/div>\n<div><span class=\"colour\">En raison des poutres courbes, il peut donc \u00eatre n\u00e9cessaire de l&rsquo;ajuster \/ l&rsquo;augmenter pour mieux exploiter la raideur des poutres courbes, selon votre jugement d&rsquo;ing\u00e9nieur.&nbsp;<\/span><\/div>\n<p><\/span><\/div>\n<\/div>\n<div><span class=\"colour\">7. Comme la dalle de rampe ne peut pas \u00eatre mod\u00e9lis\u00e9e dans Prota, vous devrez saisir le chargement manuel sur votre poutre courbe en s\u00e9lectionnant la poutre correspondante, clic droit &gt; Modifier les charges des \u00e9l\u00e9ments.<\/span><\/div>\n<div><span class=\"colour\">8. Comme indiqu\u00e9 \u00e0 l&rsquo;\u00e9tape (2)&nbsp; ou \u00e0 l&rsquo;\u00e9tape (4), veuillez saisir correctement le Del-Z du poteau afin que la longueur efficace soit calcul\u00e9e correctement. Vous pouvez \u00e9galement saisir la valeur LEN (\u00c9tage) pour faire courir la hauteur du poteau sur plus d&rsquo;un \u00e9tage.&nbsp;<\/span><\/div>\n<div><\/div>\n<div>&nbsp; &nbsp; &nbsp;&nbsp; <img decoding=\"async\" style=\"padding: 0px;max-width: 100%\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-dde35849a246.jpg\"><\/div>\n<div><\/div>\n<div><span class=\"colour\">9.&nbsp; Comme la poutre est inclin\u00e9e, certaines poutres de l&rsquo;\u00e9tage sup\u00e9rieur seront donc support\u00e9es par le poteau du dessous, et la poutre correspondante peut recevoir un rep\u00e8re de poutre en porte-\u00e0-faux.&nbsp; <br \/><\/span><\/div>\n<ol>\n<li style=\"list-style-type: disc\"><span class=\"colour\">Comme elle est support\u00e9e par le poteau du dessous, vous pouvez d\u00e9finir la poutre correspondante comme support\u00e9e aux deux extr\u00e9mit\u00e9s. Cela permet d&rsquo;\u00e9viter une v\u00e9rification du calcul erron\u00e9e, et les d\u00e9tails seront r\u00e9alis\u00e9s \u00e0 l&rsquo;\u00e9tape du calcul.&nbsp;<br \/><\/span><\/li>\n<li style=\"list-style-type: disc\"><span class=\"colour\">Pour affecter une poutre en porte-\u00e0-faux \u00e0 une poutre non porte-\u00e0-faux, veuillez s\u00e9lectionner la ou les poutres correspondantes, clic droit &gt; <b>Marquer l&rsquo;extr\u00e9mit\u00e9 libre de la poutre en porte-\u00e0-faux<\/b> &gt; <b>Appuy\u00e9e aux deux extr\u00e9mit\u00e9s<\/b>.&nbsp;<\/span><\/li>\n<\/ol>\n<div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Vous pouvez mod\u00e9liser une poutre de rampe \/ poutre annulaire. La dalle de rampe circulaire\/h\u00e9lico\u00efdale d\u00e9passe le cadre du logiciel.&nbsp; Une mod\u00e9lisation d&rsquo;exemple est jointe,&hellip;<\/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":[9],"whitepaper_topic":[],"whitepaper_product":[],"whitepaper_type":[],"class_list":["post-2151","wiki","type-wiki","status-publish","hentry","category-beam-section-design"],"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>Exemple de poutre courbe de rampe circulaire<\/title>\n<meta name=\"description\" content=\"Cet exemple explique le calcul d&#039;une poutre courbe de rampe circulaire dans ProtaStructure, depuis la mod\u00e9lisation jusqu&#039;\u00e0 la v\u00e9rification des 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