{"id":2275,"date":"2026-04-27T12:47:42","date_gmt":"2026-04-27T12:47:42","guid":{"rendered":"https:\/\/protasoftware.com\/fr\/wiki\/semelle-filante\/"},"modified":"2026-04-27T12:47:42","modified_gmt":"2026-04-27T12:47:42","slug":"semelle-filante","status":"publish","type":"wiki","link":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/semelle-filante\/","title":{"rendered":"Semelle filante"},"content":{"rendered":"<div><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Pour qu&rsquo;une semelle filante soit d\u00e9finie sous une s\u00e9rie de poteaux\/voiles, des poutres de fondation doivent avoir \u00e9t\u00e9 d\u00e9finies au pr\u00e9alable entre les poteaux\/voiles.<\/span><\/span> <\/div>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">ProtaStructure effectue les calculs de semelle filante pour toutes les combinaisons de charges et trace les diagrammes de moment et d&rsquo;effort tranchant sous forme d&rsquo;enveloppe de combinaison. Par ailleurs, des calculs sont \u00e9galement effectu\u00e9s sur la base d&rsquo;un intervalle de coefficient de r\u00e9action du sol.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Avant d&rsquo;ins\u00e9rer une semelle :<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<ol>\n<li style=\"list-style-type: decimal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Le mod\u00e8le du b\u00e2timent doit \u00eatre compl\u00e9t\u00e9 et analys\u00e9, afin que les charges axiales et les moments des poteaux et voiles soient d\u00e9termin\u00e9s.<\/span><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">L&rsquo;\u00e9tage de fondation 0 (<\/span><b><span class=\"colour\">ST: 0<\/span><\/b><span class=\"colour\">) doit \u00eatre d\u00e9fini comme l&rsquo;\u00e9tage actif.<\/span><br \/><\/span><\/li>\n<\/ol>\n<h2 class=\"toc_anchors\" id=\"Strip_Footing_Definition\"><span class=\"colour\"><span style=\"font-size: 24px;line-height: normal\" class=\"size\">D\u00e9finition de la semelle filante<\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/h2>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Pour d\u00e9finir une nouvelle semelle filante :<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<blockquote class=\"zde_indent\">\n<div><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">1. Ins\u00e9rez la ou les poutres de fondation qui seront utilis\u00e9es dans la semelle filante en acc\u00e9dant \u00e0 l&rsquo;onglet &quot;Mod\u00e9lisation&quot; en haut &gt; Poutre &gt; Poutre de fondation<\/span><\/span><\/div>\n<div><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&nbsp; &nbsp; &nbsp;Les poutres doivent \u00eatre d\u00e9finies de sorte que les \u00e9l\u00e9ments verticaux (c&rsquo;est-\u00e0-dire les poteaux et voiles) soient couverts par la semelle filante (\u00e0 leurs extr\u00e9mit\u00e9s inf\u00e9rieures).<\/span><br \/><\/span><\/div>\n<div><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">2. S\u00e9lectionnez plusieurs poutres qui seront incluses dans la semelle filante. (Notez que les poutres peuvent \u00eatre s\u00e9lectionn\u00e9es dans n&rsquo;importe quel ordre)<\/span><br \/><\/span><\/div>\n<div><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">3. Faites un clic droit pour afficher le menu contextuel et s\u00e9lectionnez l&rsquo;option &quot;<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Ins\u00e9rer une semelle filante<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&quot;. La bo\u00eete de dialogue \u201c<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Semelle filante<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">\u201d s&rsquo;affiche.&nbsp;<\/span><\/span><\/div>\n<div><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&nbsp; &nbsp; &nbsp;Vous pouvez \u00e9galement cliquer sur l&rsquo;ic\u00f4ne&nbsp;<\/span><span class=\"size\"><span class=\"colour\">&quot;<\/span><\/span><i style=\"font-size: 15px\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Ins\u00e9rer une semelle filante<\/span><\/span><\/i><span class=\"size\"><span class=\"colour\">&quot; dans le ruban sup\u00e9rieur.&nbsp;<\/span><\/span><br \/><span class=\"size\"><span class=\"colour\">4.&nbsp; Cliquez sur le bouton &quot;<\/span><\/span><i style=\"font-size: 15px\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Calculer<\/span><\/span><\/i><span class=\"size\"><span class=\"colour\">&quot; pour calculer la semelle. Reportez-vous \u00e0 la section <\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><a href=\"https:\/\/support.protasoftware.com\/portal\/en\/kb\/articles\/strip-footing#Strip_Footing_Design\" target=\"_self\">Calcul de la semelle filante<\/a><\/span><\/span><span class=\"size\"><span class=\"colour\">&nbsp;ci-dessous pour plus d&rsquo;informations sur ce sujet.<\/span><\/span><\/span><\/div>\n<div><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">5.&nbsp; &nbsp;Une fois le calcul de la semelle filante termin\u00e9, cliquez sur le bouton &quot;<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">OK<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&quot; pour terminer l&rsquo;insertion de la semelle.&nbsp;<\/span><\/span><\/div>\n<\/blockquote>\n<div>\n<div><span class=\"KB_New_Editor_Highlights\" style=\"margin: 10px 0px;position: relative;padding: 10px 10px 10px 40px\"><img decoding=\"async\" data-image=\"contentStyle\" style=\"position: absolute;left: 12px;top: 14px;width: 15px;max-width: 100%\" data-type=\"non-resize\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-8b01a885e2eb4f9b178fd97dd4ac3c3f.png\" alt=\"Alert\"> <\/p>\n<div><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Notez que le bouton &quot;OK&quot; ne sera pas disponible si le calcul de la semelle n&rsquo;est pas correctement termin\u00e9.<\/span><\/span> <\/div>\n<p><\/span><\/div>\n<\/div>\n<h2 class=\"toc_anchors\" id=\"Editing_an_Existing_Strip_Footing\"><span class=\"colour\"><span style=\"font-size: 24px;line-height: normal\" class=\"size\">Modification d&rsquo;une semelle filante existante<\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/h2>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Pour modifier une semelle filante existante :<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<ol>\n<li style=\"list-style-type: decimal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">S\u00e9lectionnez une semelle filante existante,<\/span><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Faites un clic droit pour charger le formulaire &quot;<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Propri\u00e9t\u00e9s<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&quot; et modifiez le calcul de la semelle filante,<\/span><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Cliquez sur le bouton &quot;<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">OK<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&quot; dans le formulaire &quot;<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Propri\u00e9t\u00e9s<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&quot; pour mettre \u00e0 jour la semelle.<\/span><br \/><\/span><\/li>\n<\/ol>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Vous pouvez r\u00e9p\u00e9ter cette proc\u00e9dure pour autant d&rsquo;\u00e9l\u00e9ments que vous le souhaitez. Un seul \u00e9l\u00e9ment \u00e0 la fois peut \u00eatre modifi\u00e9 par cette m\u00e9thode.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<h2 class=\"toc_anchors\" id=\"Beams_of_the_Strip_Footing\"><span class=\"colour\"><span style=\"font-size: 24px;line-height: normal\" class=\"size\">Poutres de la semelle filante<\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/h2>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Les poutres incluses dans la semelle filante doivent \u00eatre d\u00e9finies avant l&rsquo;insertion de celle-ci. Elles doivent respecter les r\u00e8gles et contraintes suivantes :<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<h4 style=\"font-size: 14px;line-height: 20px\"><u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Dimensions et excentricit\u00e9s des poutres<\/span><\/span><\/u><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/h4>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Les dimensions des poutres incluses dans une semelle filante doivent \u00eatre identiques. Des poutres de sections diff\u00e9rentes ou situ\u00e9es sur des axes diff\u00e9rents ne peuvent pas \u00eatre utilis\u00e9es dans une m\u00eame semelle filante.<\/span><\/span><\/span><\/p>\n<h2 class=\"toc_anchors\" id=\"Strip_Footing_Design\"><span class=\"colour\"><span style=\"font-size: 24px;line-height: normal\" class=\"size\">Calcul de la semelle filante<\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/h2>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Apr\u00e8s avoir s\u00e9lectionn\u00e9 les poutres de la semelle, la bo\u00eete de dialogue &quot;<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Semelle filante<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&quot; s&rsquo;affiche lorsque l&rsquo;option &quot;<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Ins\u00e9rer une semelle filante<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&quot; est choisie dans le menu contextuel affich\u00e9 par un clic droit.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">La bo\u00eete de dialogue &quot;<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Semelle filante<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&quot; peut \u00e9galement s&rsquo;afficher lorsque l&rsquo;option &quot;<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Propri\u00e9t\u00e9s<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&quot; est choisie dans le menu contextuel affich\u00e9 par un clic droit apr\u00e8s s\u00e9lection d&rsquo;une semelle filante existante.<\/span><\/span><\/span><\/p>\n<div><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-6b9e99079f93.png\" style=\"padding: 0px;max-width: 100%\"><\/span><\/span> <span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/div>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Les calculs de semelle filante sont r\u00e9alis\u00e9s selon la m\u00e9thode de la poutre sur fondation \u00e9lastique (\u201c<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">m\u00e9thode de Winkler<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">\u201d). Les calculs peuvent \u00eatre effectu\u00e9s pour toutes les combinaisons de charges, ou pour une enveloppe de toutes les combinaisons de charges. Le calcul d&rsquo;enveloppe peut aussi \u00eatre effectu\u00e9 pour un intervalle du coefficient de r\u00e9action du sol.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Afin de d\u00e9terminer les classes de b\u00e9ton, les classes d&rsquo;acier et le diam\u00e8tre des armatures utilis\u00e9s dans le calcul de la semelle filante, s\u00e9lectionnez d&rsquo;abord l&rsquo;option \u201c<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Mat\u00e9riaux<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">\u201d dans l&rsquo;onglet \u201c<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Implantation du b\u00e2timent<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">\u201d. Cliquez ensuite sur l&rsquo;onglet \u201c<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Niveau de fondation<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">\u201d dans la bo\u00eete de dialogue \u201c<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Mat\u00e9riau<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">\u201d.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<div><u><b><span class=\"font\"><span style=\"font-size: 16px;line-height: normal\" class=\"size\"><span class=\"colour\"><span class=\"highlight\">Calcul de semelle filant<\/span><\/span><\/span><\/span><\/b><span class=\"font\"><span style=\"font-size: 16px;line-height: normal\" class=\"size\"><span class=\"colour\"><span class=\"highlight\"><b>e<\/b><\/span><\/span><\/span><\/span><\/u><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/div>\n<ol>\n<li style=\"list-style-type: decimal\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Les informations de charge et de g\u00e9om\u00e9trie de tous les poteaux, voiles et poutres associ\u00e9s seront charg\u00e9es dans la bo\u00eete de dialogue \u201c<\/span><\/span><i><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Semelle filante<\/span><\/span><\/i><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">\u201d. Seules les informations du champ blanc peuvent \u00eatre modifi\u00e9es.<\/span><\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Saisissez le rep\u00e8re dans &quot;<\/span><\/span><i><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Rep\u00e8re de semelle filante<\/span><\/span><\/i><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">&quot;.<\/span><\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">S\u00e9lectionnez, \u00e0 l&rsquo;aide du menu d\u00e9roulant de la section \u201cChargement\u201d, la combinaison pour laquelle les calculs doivent \u00eatre effectu\u00e9s.&nbsp; Pour obtenir une enveloppe de calcul pour toutes les combinaisons, cochez la case \u201cEnveloppe de calcul\u201d.<\/span><\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Saisissez la valeur du \u201cCoefficient de r\u00e9action du sol\u201d dans le champ \u201cCoefficient de r\u00e9action du sol\u201d.<\/span><\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Pour effectuer les calculs sur un intervalle de valeurs de r\u00e9action du sol, cochez la case \u201cPas\u201d. Saisissez ensuite la seconde valeur du coefficient de r\u00e9action du sol dans le second champ activ\u00e9. Indiquez le nombre de pas de l&rsquo;intervalle \u00e0 l&rsquo;aide des boutons incr\u00e9mentaux.<\/span><\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Pour d\u00e9terminer la largeur de la semelle, s\u00e9lectionnez la m\u00e9thode appropri\u00e9e dans \u201cS\u00e9lection de la contrainte du sol pour le calcul de la largeur de la semelle\u201d.<\/span><\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/><\/span><\/li>\n<li style=\"list-style-type: decimal\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Cliquez sur le bouton \u201cCalculer\u201d. <\/span><\/span><\/li>\n<ol>\n<li style=\"list-style-type: square\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Notez que les cases \u201cEnveloppe de calcul\u201d et \u201cPas\u201d doivent \u00eatre coch\u00e9es ensemble si vous voulez effectuer les calculs \u00e0 la fois pour la r\u00e9action du sol et l&rsquo;enveloppe de combinaisons.<\/span><\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/><\/span><\/li>\n<\/ol>\n<li style=\"list-style-type: decimal\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Les r\u00e9sultats du calcul seront charg\u00e9s dans le formulaire \u201cR\u00e9sultats de calcul de la semelle filante\u201d. <\/span><\/span><\/li>\n<ol>\n<li style=\"list-style-type: square\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><span class=\"colour\">Les diagrammes de pression du sol, d&rsquo;effort tranchant et de moment sont affich\u00e9s.&nbsp;<\/span><\/span><\/li>\n<li style=\"list-style-type: square\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Cliquez sur &quot;Note de calcul&quot; pour v\u00e9rifier l&rsquo;analyse et le calcul<\/span><\/span><\/li>\n<li style=\"list-style-type: square\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><span class=\"colour\">Cliquez sur &quot;OK&quot; pour terminer le calcul &amp; fermer la bo\u00eete de dialogue.&nbsp;<\/span><\/span><\/li>\n<\/ol>\n<li style=\"list-style-type: decimal\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">La bo\u00eete de dialogue principale de la semelle filante affichera maintenant le calcul :&nbsp;&nbsp;<\/span><\/span><\/li>\n<ol>\n<li style=\"list-style-type: square\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><span class=\"colour\">La largeur de la semelle sera calcul\u00e9e automatiquement \u00e0 la valeur minimale permettant de respecter la contrainte maximale admissible du sol.&nbsp;<\/span><\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"list-style-type: square\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><span class=\"colour\">V\u00e9rifiez attentivement la largeur calcul\u00e9e et modifiez-la ou arrondissez-la si n\u00e9cessaire. Ne r\u00e9duisez pas la largeur, sinon elle sera insuffisante.&nbsp;<\/span><\/span><span class=\"colour\"><br \/><\/span><\/li>\n<li style=\"list-style-type: square\"><span style=\"font-size: 16px;line-height: normal\" class=\"size\"><span class=\"colour\">Si la largeur de la semelle est modifi\u00e9e, cliquez sur &quot;Calculer&quot; pour rev\u00e9rifier le calcul ; puis r\u00e9g\u00e9n\u00e9rez la note de calcul.&nbsp;&nbsp;<\/span><\/span><\/li>\n<\/ol>\n<li style=\"list-style-type: decimal\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Vous pouvez effectuer le calcul des poutres de fondation en s\u00e9lectionnant \u201cPoutres de fondation\u201d dans l&rsquo;onglet \u201cCalcul\u201d.<\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/li>\n<\/ol>\n<h4 style=\"font-size: 14px;line-height: 20px\"><u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">S\u00e9lection de la contrainte du sol pour le calcul de la largeur de la semelle<\/span><\/span><\/u><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/h4>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Avant de commencer le calcul de la semelle filante, il est n\u00e9cessaire de d\u00e9terminer la m\u00e9thode de calcul de la pression du sol sous la semelle.&nbsp; S\u00e9lectionnez \u00e0 cet effet la m\u00e9thode appropri\u00e9e parmi celles indiqu\u00e9es dans le champ \u201cCrit\u00e8res de s\u00e9lection de la pression du sol pour le calcul de la largeur de la semelle\u201d.&nbsp;<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">La m\u00e9thode par d\u00e9faut est \u201c<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Contrainte maximale du sol<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">\u201d, g\u00e9n\u00e9ralement utilis\u00e9e pour les sols mous. Pour les sols fermes, d&rsquo;autres m\u00e9thodes, \u00e0 savoir \u201c<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Moyenne dans la r\u00e9gion L\/4 du poteau<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">\u201d et \u201c<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Moyenne dans la r\u00e9gion L\/2 du poteau<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">\u201d, peuvent aussi \u00eatre utilis\u00e9es. Ces deux m\u00e9thodes doivent toutefois \u00eatre utilis\u00e9es avec prudence, car la pression du sol calcul\u00e9e peut diminuer sans aucun contr\u00f4le et conduire \u00e0 un calcul non s\u00e9curis\u00e9.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<h4 style=\"font-size: 14px;line-height: 20px\"><u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Extensions gauche et droite<\/span><\/span><\/u><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/h4>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Deux champs sont r\u00e9serv\u00e9s aux prolongements au d\u00e9but et \u00e0 la fin de la semelle filante.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Saisissez les longueurs de porte-\u00e0-faux (prolongement) dans les champs \u00ab Porte-\u00e0-faux droit \u00bb et \u00ab Porte-\u00e0-faux gauche \u00bb si vous souhaitez inclure ces prolongements dans le calcul.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<div><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/div>\n<div><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-1de53932b89b.png\" style=\"padding: 0px;max-width: 100%\"> <\/div>\n<p style=\"line-height: 20px\"><span class=\"font\"><\/span><\/p>\n<h4 style=\"font-size: 14px;line-height: 20px\"><u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Largeur de la semelle<\/span><\/span><\/u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/h4>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Si vous ne saisissez aucune valeur dans ce champ avant le calcul, la largeur de semelle requise est calcul\u00e9e automatiquement. Vous pouvez saisir dans ce champ une largeur diff\u00e9rente de la valeur calcul\u00e9e. Dans ce cas, cliquez de nouveau sur le bouton \u00ab Calculer \u00bb. Si la largeur requise d\u00e9passe la valeur saisie, la valeur calcul\u00e9e est utilis\u00e9e. Si la valeur saisie d\u00e9passe la largeur requise, la valeur saisie est utilis\u00e9e.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/p>\n<h4 style=\"font-size: 14px;line-height: 20px\"><u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Hauteur de la semelle<\/span><\/span><\/u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/h4>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">La hauteur de la semelle doit \u00eatre renseign\u00e9e avant le calcul. Cette valeur peut \u00eatre modifi\u00e9e si n\u00e9cessaire, mais il faut alors refaire le calcul.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/p>\n<h4 style=\"font-size: 14px;line-height: 20px\"><u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Diam\u00e8tre des armatures de la semelle<\/span><\/span><\/u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/h4>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Saisissez le diam\u00e8tre d&rsquo;acier \u00e0 utiliser pour le calcul de la semelle. Si l&rsquo;espacement des armatures calcul\u00e9 est trop serr\u00e9, indiquez un diam\u00e8tre plus grand.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/p>\n<h4 style=\"font-size: 14px;line-height: 20px\"><u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Liste des poteaux<\/span><\/span><\/u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/h4>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Les informations d&rsquo;un poteau situ\u00e9 sur un alignement de semelle filante se modifient dans le tableau de la liste des poteaux. Effectuez les modifications n\u00e9cessaires directement dans les cellules du tableau. Les champs de donn\u00e9es du tableau sont d\u00e9crits ci-dessous.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/p>\n<h5 style=\"font-size: 14px;line-height: 20px\"><u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Nom du poteau<\/span><\/span><\/u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/h5>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Le nom du poteau d\u00e9fini dans l&rsquo;\u00e9diteur graphique s&rsquo;affiche ici.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/p>\n<h5 style=\"font-size: 14px;line-height: 20px\"><span style=\"font-size: 16px\" class=\"size\"><u><span class=\"colour\">Section du poteau <\/span><\/u><span class=\"colour\">(<\/span><u><span class=\"colour\">b-column\/<\/span><\/u><\/span><u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">e-column)<\/span><\/span><\/u><span class=\"colour\"><br \/><\/span><\/h5>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">La longueur (b-column) des poteaux suit le sens de la semelle filante. La longueur (e-column) lui est perpendiculaire. Les moments sur appui et les efforts tranchants calcul\u00e9s dans les poutres diminuent quand ce param\u00e8tre augmente.<\/span><\/span><\/span><span class=\"colour\"><br \/><\/span><\/p>\n<h5 style=\"font-size: 14px;line-height: 20px\"><span style=\"font-weight: normal\"><u><span style=\"font-size: 16px\" class=\"size\"><b><span class=\"colour\">Charges axiales et moments<\/span><\/b><\/span><\/u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"><br \/><\/span><\/span><\/span><\/h5>\n<div><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Les charges axiales et les moments relev\u00e9s aux n\u0153uds inf\u00e9rieurs des poteaux de fondation sont list\u00e9s ici pour la combinaison s\u00e9lectionn\u00e9e.&nbsp;<\/span><\/span><\/div>\n<div><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-bedea905f638.png\" style=\"padding: 0px;max-width: 100%\"> <span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/div>\n<div><\/div>\n<h5 style=\"font-size: 14px;line-height: 20px\"><u><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Largeur de trav\u00e9e orthogonale<\/span><\/span><\/u><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/h5>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Si les semelles filantes sont dispos\u00e9es selon une grille 2D, les charges axiales des poteaux doivent \u00eatre r\u00e9parties entre les deux semelles dans les deux directions. Pour cela, saisissez la distance du poteau dans la direction orthogonale dans le champ \u00ab <\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Long. autre dir.<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"> \u00bb. Ces charges axiales r\u00e9duites apparaissent dans la fen\u00eatre \u00ab R\u00e9sultats de la semelle filante \u00bb.&nbsp;<\/span><\/span><\/span><\/p>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">D\u00e9finition de la largeur de trav\u00e9e orthogonale.<\/span><\/span><\/span><span style=\"font-size: 16px\" class=\"size\"><br \/><\/span><\/p>\n<p style=\"line-height: 20px\"><span class=\"font\"><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">Dans le sch\u00e9ma d&rsquo;exemple ci-dessus, \u00ab <\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">d1<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"> \u00bb est la largeur de trav\u00e9e orthogonale du poteau&nbsp;<\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">S1<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">&nbsp;quand la semelle filante est calcul\u00e9e selon l&rsquo;axe A.&nbsp; De m\u00eame, la largeur de trav\u00e9e orthogonale du poteau S2 selon l&rsquo;axe B vaut \u00ab <\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">d1 + d2<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"> \u00bb. La valeur du poteau S3 selon l&rsquo;axe C vaut \u00ab <\/span><\/span><i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\">d2 + 2*d3<\/span><\/span><\/i><span style=\"font-size: 16px\" class=\"size\"><span class=\"colour\"> \u00bb, contrairement aux autres.<\/span><\/span><\/span><\/p>\n<div><span style=\"margin: 10px 0px;position: relative;padding: 10px 10px 10px 40px\" class=\"KB_New_Editor_Highlights\"><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-c3228c55d048da229f2fcd22876e050f.png\" data-type=\"non-resize\" style=\"position: absolute;left: 12px;top: 14px;width: 15px\" data-image=\"contentStyle\" alt=\"Notes\"><\/p>\n<p><span><b><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><span class=\"colour\">Pourquoi 2*d3 ?&nbsp;<\/span><\/span><\/b><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><span class=\"colour\"> <\/span><\/span><\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><span class=\"colour\"><br \/><\/span><\/span><\/p>\n<div><span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><span class=\"colour\">La moiti\u00e9 de la valeur saisie pour l&rsquo;autre direction sert \u00e0 d\u00e9terminer la surface du poteau lors de la r\u00e9partition de sa charge entre les deux axes de direction.&nbsp;<\/span><\/span><\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><span class=\"colour\"><br \/><\/span><\/span><\/div>\n<div><span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><span class=\"colour\">En pr\u00e9sence d&rsquo;une poutre en porte-\u00e0-faux dans l&rsquo;autre direction, la dimension de cette direction doit inclure deux fois la longueur de cette poutre.<\/span><\/span><\/span><\/div>\n<p><\/span><\/div>\n<div><\/div>\n<div><\/div>\n<div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Pour qu&rsquo;une semelle filante soit d\u00e9finie sous une s\u00e9rie de poteaux\/voiles, des poutres de fondation doivent avoir \u00e9t\u00e9 d\u00e9finies au pr\u00e9alable entre les poteaux\/voiles. ProtaStructure&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":[45],"whitepaper_topic":[],"whitepaper_product":[],"whitepaper_type":[],"class_list":["post-2275","wiki","type-wiki","status-publish","hentry","category-foundation-modelling-and-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>Semelle filante<\/title>\n<meta name=\"description\" content=\"La semelle filante r\u00e9partit les charges d&#039;un mur porteur sur le sol : calcul, ferraillage et dimensionnement selon les normes de calcul en vigueur.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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