{"id":2211,"date":"2026-04-27T12:27:23","date_gmt":"2026-04-27T12:27:23","guid":{"rendered":"https:\/\/protasoftware.com\/fr\/wiki\/analyse-de-construction-par-phases\/"},"modified":"2026-04-27T12:27:23","modified_gmt":"2026-04-27T12:27:23","slug":"analyse-de-construction-par-phases","status":"publish","type":"wiki","link":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/analyse-de-construction-par-phases\/","title":{"rendered":"Analyse de construction par phases"},"content":{"rendered":"<div class=\"markdown-content\">\n<h1 class=\"toc_anchors\" id=\"Introduction\"><span class=\"colour\">Introduction<br \/><\/span><\/h1>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<div><span class=\"colour\"><br \/>\n <\/span><span style=\"font-size: 16px;line-height: normal\" class=\"size\"><span class=\"colour\">L&rsquo;analyse de construction par \u00e9tapes est une m\u00e9thode de r\u00e9solution sophistiqu\u00e9e qui, utilis\u00e9e avec un degr\u00e9 de pr\u00e9caution raisonnable, peut refl\u00e9ter plus fid\u00e8lement le comportement r\u00e9el de la structure.&nbsp;<\/span><\/span><span class=\"colour\"><br \/>\n<\/span><\/div>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<div><span class=\"colour\"><br \/>\n <\/span><span style=\"font-size: 16px;line-height: normal\" class=\"size\"><span class=\"colour\">\u200b<br \/><\/span><\/span><span class=\"colour\"><br \/>\n<\/span><\/div>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<div><span class=\"colour\"><br \/>\n <\/span><span style=\"font-size: 16px;line-height: normal\" class=\"size\"><span class=\"colour\">Une analyse 3D standard ne tient pas compte des effets d\u00e9pendants du temps \u2010 elle suppose que la structure a \u00e9t\u00e9 construite instantan\u00e9ment. Dans la r\u00e9alit\u00e9, un b\u00e2timent en b\u00e9ton doit \u00eatre construit par \u00e9tapes \u2010 g\u00e9n\u00e9ralement un \u00e9tage \u00e0 la fois. Selon le nombre d&rsquo;\u00e9tages du b\u00e2timent, un d\u00e9lai important peut s&rsquo;\u00e9couler entre le d\u00e9but du premier \u00e9tage et l&rsquo;ach\u00e8vement du dernier \u00e9tage.<\/span><\/span><span class=\"colour\"><br \/>\n<\/span><\/div>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<div><span class=\"colour\"><br \/>\n <br \/>\n<\/span><\/div>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<div><span class=\"colour\"><br \/>\n <\/span><span style=\"font-size: 16px;line-height: normal\" class=\"size\"><span class=\"colour\"> Le b\u00e9ton m\u00fbrissant avec le temps, le b\u00e9ton du dernier \u00e9tage pr\u00e9sente des propri\u00e9t\u00e9s qui \u00ab accusent un retard \u00bb sur celles du premier \u00e9tage (et, \u00e0 un degr\u00e9 moindre, sur celles de chaque \u00e9tage interm\u00e9diaire).<br \/><\/span><\/span><span class=\"colour\"><br \/>\n<\/span><\/div>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<div><span class=\"colour\"><br \/>\n <br \/>\n<\/span><\/div>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<div><span class=\"colour\"><br \/>\n <\/span><span style=\"font-size: 16px;line-height: normal\" class=\"size\"><span class=\"colour\">Un autre aspect du caract\u00e8re phas\u00e9 de la construction en b\u00e9ton concerne le tassement des \u00e9tages inf\u00e9rieurs d\u00e9j\u00e0 construits. Ce tassement, survenu avant le coulage de l&rsquo;\u00e9tage en cours, est pris en compte sur site lors de la mise \u00e0 niveau de cet \u00e9tage. Une analyse 3D standard ne peut pas int\u00e9grer cet effet, alors qu&rsquo;une analyse de construction par \u00e9tapes le prend en compte automatiquement.<\/span><\/span><span class=\"colour\"><br \/>\n<\/span><\/div>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<div><span class=\"colour\"><br \/>\n <\/span><\/p>\n<h2 class=\"toc_anchors\" id=\"Simple_Example\"><span class=\"colour\">Exemple simple<br \/><\/span><\/h2>\n<p><span class=\"colour\"><br \/>\n<\/span><\/div>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<div><span class=\"colour\"><br \/>\n <span class=\"size\" style=\"font-size: 16px;line-height: normal\">Un mod\u00e8le compos\u00e9 de deux blocs est construit comme illustr\u00e9 ci-dessous. Le plan et le chargement du premier \u00e9tage sont identiques dans les deux blocs. Une ossature de second \u00e9tage est ajout\u00e9e au bloc de droite, sans charge d&rsquo;exploitation appliqu\u00e9e \u00e0 ce niveau.<\/span><\/span>\n<\/div>\n<div>\n \n<\/div>\n<div>\n <img decoding=\"async\" style=\"padding: 0px;max-width: 100%\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-af82ef24cf1b.png\">\n<\/div>\n<div>\n \n<\/div>\n<div>\n <span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Une analyse 3D standard peut \u00eatre r\u00e9alis\u00e9e pour ce cas, dans laquelle tous les \u00e9l\u00e9ments sont analys\u00e9s simultan\u00e9ment avec toutes les charges appliqu\u00e9es.<\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/><\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/>\n<\/span><\/span><\/div>\n<p><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/>\n<\/span><\/span><\/p>\n<div><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/>\n Une analyse de construction par \u00e9tapes peut \u00e9galement \u00eatre r\u00e9alis\u00e9e. Si l&rsquo;option choisie consiste \u00e0 phaser uniquement la charge d&rsquo;exploitation, l&rsquo;analyse se d\u00e9roule comme suit :<\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/><\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/>\n<\/span><\/span><\/div>\n<p><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/>\n<\/span><\/span><\/p>\n<ol><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/>\n <\/span><\/span><\/p>\n<li style=\"list-style-type: disc\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Dans la premi\u00e8re \u00e9tape, seuls les premiers \u00e9tages sont analys\u00e9s pour leur charge d&rsquo;exploitation.<\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/><\/span><\/span><\/li>\n<p><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/>\n <\/span><\/span><\/p>\n<li style=\"list-style-type: disc\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Dans la deuxi\u00e8me \u00e9tape, le second \u00e9tage est ajout\u00e9 et l&rsquo;analyse est r\u00e9p\u00e9t\u00e9e (pour le mod\u00e8le non d\u00e9form\u00e9), mais cette fois uniquement pour la charge d&rsquo;exploitation au niveau du second \u00e9tage.<\/span><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/><\/span><\/span><\/li>\n<p><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><br \/>\n <\/span><\/span><\/p>\n<li style=\"list-style-type: disc\"><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">De cette mani\u00e8re, chaque \u00e9tape n&rsquo;influence le r\u00e9sultat que dans sa propre \u00e9tape et dans les \u00e9tapes pr\u00e9c\u00e9dentes.<\/span><br \/><\/span><\/li>\n<p><span class=\"colour\"><br \/>\n<\/span><\/ol>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<div><span class=\"colour\"><br \/>\n <\/span><\/p>\n<h2 class=\"toc_anchors\" id=\"Results_for_Q_-_Unstaged\"><span class=\"colour\">R\u00e9sultats pour Q &#8211; Non phas\u00e9<\/span><br \/><\/h2>\n<div class=\" align-left\" style=\"text-align: left\">\n  <img decoding=\"async\" style=\"padding: 0px;max-width: 100%\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-17f5f9037875.png\"><span class=\"font\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\"><span class=\"colour\"><span class=\"highlight\">\u200b\u200b\u200b\u200b\u200b<\/span><\/span><\/span><\/span>\n <\/div>\n<\/div>\n<div>\n <span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Dans le r\u00e9sultat non phas\u00e9, la charge Q appliqu\u00e9e au premier \u00e9tage g\u00e9n\u00e8re des moments dans la structure au-dessus. Si cette ossature existait d\u00e9j\u00e0 lors de l&rsquo;application de la charge, ce r\u00e9sultat est parfaitement logique.<\/span><br \/>\n<\/span><\/div>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<h2 class=\"toc_anchors\" id=\"Results_for_Q__Staged\"><span class=\"colour\">R\u00e9sultats pour Q \u2010 Phas\u00e9<\/span><br \/><\/h2>\n<div>\n<p class=\"MsoNormal\"><img decoding=\"async\" style=\"padding: 0px;max-width: 100%\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-d52c45a93281.png\"><\/p>\n<p><span class=\"colour\"><span class=\"size\" style=\"font-size: 16px;line-height: normal\">Dans le r\u00e9sultat phas\u00e9, aucun moment ne se d\u00e9veloppe dans l&rsquo;ossature au-dessus des \u00e9l\u00e9ments du premier \u00e9tage. Les efforts dans la structure du premier \u00e9tage sont d&rsquo;ailleurs identiques entre l&rsquo;ossature \u00e0 un niveau et l&rsquo;ossature \u00e0 deux niveaux. Ce r\u00e9sultat est logique si toute la charge est appliqu\u00e9e avant l&rsquo;existence de l&rsquo;ossature sup\u00e9rieure, et si l&rsquo;on suppose que toute la fl\u00e8che est instantan\u00e9e.<\/span><br \/><\/span><\/p>\n<p><span class=\"colour\"><br \/>\n<\/span><\/div>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<div><span class=\"colour\"><br \/>\n <\/span><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-b42de9d8b77841c20f4247548fc62f8c.png\" data-type=\"non-resize\" style=\"position: absolute;left: 12px;top: 14px;width: 15px;max-width: 100%\" data-image=\"contentStyle\" alt=\"Notes\"><span class=\"colour\"><br \/>\n  <\/span><\/p>\n<div><span class=\"colour\"><br \/>\n   <span class=\"size\" style=\"font-size: 16px;line-height: normal\">L&rsquo;effet du fluage n&rsquo;est pas pris en compte ci-dessus \u2010 en r\u00e9alit\u00e9, les poutres du premier \u00e9tage continueraient \u00e0 fl\u00e9chir et les n\u0153uds \u00e0 tourner apr\u00e8s la construction et le chargement de l&rsquo;ossature.&nbsp;Bien qu&rsquo;aucun moment n&rsquo;apparaisse dans l&rsquo;ossature du second \u00e9tage au moment de sa&nbsp;construction, le fluage de la structure du premier \u00e9tage devrait donc g\u00e9n\u00e9rer&nbsp;des moments dans le second \u00e9tage au fil du temps.<\/span><\/span>\n  <\/div>\n<p><\/span><\/p>\n<h1 class=\"toc_anchors\" id=\"Model_Creation\"><span class=\"colour\">Cr\u00e9ation du mod\u00e8le<br \/><\/span><\/h1>\n<p><span class=\"colour\"><br \/>\n <\/span><\/p>\n<div><span class=\"colour\"><br \/>\n  <span style=\"font-size: 16px;line-height: normal\" class=\"size\">Aucune \u00e9tape suppl\u00e9mentaire n&rsquo;est requise lors de la cr\u00e9ation d&rsquo;un mod\u00e8le pour une construction par \u00e9tapes. Les \u00e9tapes sont cr\u00e9\u00e9es automatiquement, (chaque \u00e9tage \u00e9tant trait\u00e9 comme une \u00e9tape distincte). Les \u00e9tapes peuvent \u00eatre ajust\u00e9es une fois le mod\u00e8le cr\u00e9\u00e9, comme d\u00e9crit dans la section Contr\u00f4le des \u00e9tapes.<\/span><\/span>\n <\/div>\n<h1 class=\"toc_anchors\" id=\"Staged_Loading_Creation\"><span class=\"colour\">Cr\u00e9ation du chargement par \u00e9tapes<br \/><\/span><\/h1>\n<p><span class=\"colour\"><br \/>\n <\/span><\/p>\n<div><span class=\"colour\"><br \/>\n  <span style=\"font-size: 16px;line-height: normal\" class=\"size\"><span class=\"colour\">Le chargement par \u00e9tapes est d\u00e9fini dans l&rsquo;\u00c9diteur de combinaisons de charges en cliquant sur le bouton G\u00e9n\u00e9rateur de chargement <\/span><\/span><span style=\"font-size: 16px;line-height: normal\" class=\"size\">:&nbsp;<\/span><a href=\"https:\/\/support.protasoftware.com\/portal\/en\/kb\/articles\/load-combinations#Staged_Construction\" target=\"_blank\" rel=\"noopener noreferrer\"><span style=\"font-size: 16px;line-height: normal\" class=\"size\">Combinaison de charges pour construction par \u00e9tapes<\/span><\/a>\n <\/div>\n<h1 class=\"toc_anchors\" id=\"Durationof_Each_Stage\"><span class=\"colour\">Dur\u00e9e de chaque \u00e9tape<br \/><\/span><\/h1>\n<p><span class=\"colour\"><br \/>\n <\/span><\/p>\n<div><span class=\"colour\"><br \/>\n  <span style=\"font-size: 16px;line-height: normal\" class=\"size\">La dur\u00e9e de chaque \u00e9tape d\u00e9termine le module d&rsquo;\u00e9lasticit\u00e9 utilis\u00e9 pour cette \u00e9tape \u2010 on suppose l&rsquo;utilisation d&rsquo;un ciment normal, de sorte que le module d&rsquo;\u00e9lasticit\u00e9 du b\u00e9ton, <\/span><\/span><b><span class=\"colour\"><span style=\"font-size: 16px;line-height: normal\" class=\"size\">Ec<\/span><\/span><\/b><span class=\"colour\"><span style=\"font-size: 16px;line-height: normal\" class=\"size\"> \u00e0 l&rsquo;\u00e2ge t est estim\u00e9 par :<\/span><\/span>\n <\/div>\n<\/div>\n<\/div>\n<p style=\"margin-right: 29pt;line-height: 90%\" class=\"MsoNormal\"><img decoding=\"async\" style=\"padding: 0px;max-width: 100%\" data-zdeskdocselectedclass=\"original\" data-zdeskdocid=\"img_8663810832682077\" class=\"docsimage\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-496822f402c2.png\"><\/p>\n<div>\n <span class=\"colour\">L&rsquo;importance de la dur\u00e9e de la phase sur Ec est illustr\u00e9e ci-dessous : <br \/>\n<\/span><\/div>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<ol><span class=\"colour\"><br \/>\n <\/span><\/p>\n<li style=\"list-style-type: disc\"><span class=\"colour\">Dur\u00e9e 1 jour&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0.59 Ec(28)<br \/><\/span><\/li>\n<p><span class=\"colour\"><br \/>\n <\/span><\/p>\n<li style=\"list-style-type: disc\"><span class=\"colour\">Dur\u00e9e 15 jours&nbsp; &nbsp; &nbsp; &nbsp; 0.96 Ec(28)<br \/><\/span><\/li>\n<p><span class=\"colour\"><br \/>\n <\/span><\/p>\n<li style=\"list-style-type: disc\"><span class=\"colour\">Dur\u00e9e 28 jours&nbsp; &nbsp; &nbsp; &nbsp;1.00 Ec(28)<br \/><\/span><\/li>\n<p><span class=\"colour\"><br \/>\n <\/span><\/p>\n<li style=\"list-style-type: disc\"><span class=\"colour\">Dur\u00e9e 99 jours&nbsp; &nbsp; &nbsp; &nbsp;1.06 Ec(28)<br \/><\/span><\/li>\n<p><span class=\"colour\"><br \/>\n<\/span><\/ol>\n<p><span class=\"colour\"><br \/>\n<\/span><\/p>\n<div><span class=\"colour\"><br \/>\n <\/span><\/p>\n<div><span class=\"colour\"><br \/>\n  On observe ci-dessus que les variations li\u00e9es \u00e0 la dur\u00e9e n&rsquo;ont pas d&rsquo;impact important sur les r\u00e9sultats apr\u00e8s les premiers jours.<\/span>\n <\/div>\n<h1 class=\"toc_anchors\" id=\"Analysis_Properties\"><span class=\"colour\">Propri\u00e9t\u00e9s de l&rsquo;analyse<br \/><\/span><\/h1>\n<p><span class=\"colour\"><br \/>\n <\/span><\/p>\n<div><span class=\"colour\"><br \/>\n  <\/span><\/p>\n<div><span class=\"colour\"><br \/>\n   Comme pour la construction non phas\u00e9e, les facteurs sont appliqu\u00e9s via le<\/span>&nbsp;<a href=\"https:\/\/support.protasoftware.com\/portal\/en\/kb\/articles\/model-options#Material_and_Section_Effective_Factor_Stiffness\" target=\"_blank\" rel=\"noopener noreferrer\">Facteur de rigidit\u00e9 effective du mat\u00e9riau et de la section<\/a>.&nbsp;<span class=\"colour\">Ils s&rsquo;appliquent \u00e0 toutes les phases de construction.<br \/>\n  <\/span><\/div>\n<p><span class=\"colour\"><br \/>\n <\/span><\/div>\n<p><span class=\"colour\"><br \/>\n <\/span><\/p>\n<div><span class=\"colour\"><br \/>\n  Le Facteur du module d&rsquo;\u00e9lasticit\u00e9 m\u00e9rite une attention particuli\u00e8re, car il permet de tenir compte du fluage et de la fissuration. La valeur saisie ici s&rsquo;applique au module d&rsquo;\u00e9lasticit\u00e9 \u00e0 court terme Ec(28), d\u00e9fini dans la bo\u00eete de dialogue Mat\u00e9riau.<\/span>\n <\/div>\n<\/div>\n<div>\n \n<\/div>\n<div>\n <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-b42de9d8b77841c20f4247548fc62f8c.png\" data-type=\"non-resize\" style=\"position: absolute;left: 12px;top: 14px;width: 15px;max-width: 100%\" data-image=\"contentStyle\" alt=\"Remarque\"><span class=\"colour\"><br \/>\n  <\/span><\/p>\n<div><span class=\"colour\"><br \/>\n   La prise en compte du fluage n&rsquo;est r\u00e9ellement effective que dans le cadre d&rsquo;une analyse non phas\u00e9e. <br \/>\n  <\/span><\/div>\n<p><span class=\"colour\"><br \/>\n  <\/span><\/p>\n<div><span class=\"colour\"><br \/>\n   La valeur de E retenue est tr\u00e8s importante pour l&rsquo;\u00e9valuation de la sensibilit\u00e9 au d\u00e9placement des n\u0153uds selon l&rsquo;EC2 (et selon les autres normes \u00e9galement, si l&rsquo;option de n\u0153uds d\u00e9pla\u00e7ables de l&rsquo;ACI est utilis\u00e9e).<\/span>\n  <\/div>\n<p><\/span>\n<\/div>\n<div>\n \n<\/div>\n<div>\n \n<\/div>\n<p><strong>T\u00e9l\u00e9chargements<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/Stagedconstruction_analysis_01.zip\" target=\"_blank\" rel=\"noopener noreferrer\">Stagedconstruction_analysis_01<\/a> (0.2 MB)<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Introduction L&rsquo;analyse de construction par \u00e9tapes est une m\u00e9thode de r\u00e9solution sophistiqu\u00e9e qui, utilis\u00e9e avec un degr\u00e9 de pr\u00e9caution raisonnable, peut refl\u00e9ter plus fid\u00e8lement le&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":[32],"whitepaper_topic":[],"whitepaper_product":[],"whitepaper_type":[],"class_list":["post-2211","wiki","type-wiki","status-publish","hentry","category-building-analysis"],"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>Analyse de construction par phases<\/title>\n<meta name=\"description\" content=\"L&#039;analyse de construction par phases \u00e9value l&#039;\u00e9volution des charges, des d\u00e9formations et des contraintes \u00e0 chaque \u00e9tape d&#039;un chantier de structure.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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