{"id":1998,"date":"2026-04-27T11:39:29","date_gmt":"2026-04-27T11:39:29","guid":{"rendered":"https:\/\/protasoftware.com\/fr\/wiki\/protastructure-guide-de-conception-du-generateur-de-charges\/"},"modified":"2026-04-27T11:39:29","modified_gmt":"2026-04-27T11:39:29","slug":"protastructure-guide-de-conception-du-generateur-de-charges","status":"publish","type":"wiki","link":"https:\/\/protasoftware.com\/fr\/support\/manuels-techniques\/protastructure-guide-de-conception-du-generateur-de-charges\/","title":{"rendered":"ProtaStructure : Guide de conception du g\u00e9n\u00e9rateur de charges"},"content":{"rendered":"<div>\n<h1 class=\"toc_anchors\" id=\"Scope\"><span class=\"colour\">Champ d&rsquo;application<\/span><\/h1>\n<p class=\"MsoNormal\"><span class=\"colour\">ProtaStructure peut g\u00e9n\u00e9rer automatiquement les<br \/>\ncombinaisons de charges requises par diff\u00e9rents codes de calcul. Pour g\u00e9n\u00e9rer<br \/>\nles combinaisons de charges automatiquement, utilisez le <\/span><b><span class=\"colour\">G\u00e9n\u00e9rateur de charges<\/span><\/b><span class=\"colour\"> sous <\/span><b><span class=\"colour\">Analyse<br \/>\n&gt; Analyse du b\u00e2timent &gt; Combinaisons de charges<\/span><\/b><span class=\"colour\">. Ce document explique les diff\u00e9rentes<br \/>\noptions du g\u00e9n\u00e9rateur de charges.<\/span><\/p>\n<div><span class=\"colour\"><\/span><\/div>\n<h2 class=\"toc_anchors\" id=\"Dead_and_Live_Load_Cases\"><a name=\"_Toc52800843\"><\/a><a name=\"_Toc52801292\"><span><span class=\"colour\">Cas de charges permanentes et d&rsquo;exploitation<\/span><\/span><\/a><\/h2>\n<p class=\"MsoNormal\"><span class=\"colour\">Les cas de charges permanentes et d&rsquo;exploitation doivent exister dans tous les projets. C&rsquo;est<br \/>\npourquoi il n&rsquo;est pas possible de d\u00e9cocher ces deux options dans ProtaStructure.<\/span><\/p>\n<p class=\"MsoNormal\"><span class=\"colour\">Les charges d&rsquo;exploitation en damier sont optionnelles. Par d\u00e9faut, seul le motif de trav\u00e9es<br \/>\ncharg\u00e9es paires et impaires est utilis\u00e9. Vous pouvez cocher les trois autres motifs et les inclure<br \/>\ndans les combinaisons.<\/span><\/p>\n<div><\/div>\n<div><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-4402f53d101adf8258ad7b03d053b4bd.png\" style=\"max-width: 100%;height: auto;padding: 0\"><\/div>\n<\/p>\n<p class=\"MsoNormal\"><span><\/span><\/p>\n<p class=\"MsoNormal\"><span class=\"colour\">Des cas de charge en damier distincts sont g\u00e9n\u00e9r\u00e9s pour chaque<br \/>\ndirection orthogonale si \u201c<\/span><b><span class=\"colour\">Chargement en damier d\u00e9pendant de la direction<\/span><\/b><span class=\"colour\">\u201d est<br \/>\ncoch\u00e9.<\/span><\/p>\n<div><span class=\"colour\"><\/span><\/div>\n<h2 class=\"toc_anchors\" id=\"Roof_Live_Load_Cases\"><a name=\"_Toc52800844\"><\/a><a name=\"_Toc52801293\"><span><span class=\"colour\">Cas de charges d&rsquo;exploitation de toiture<\/span><\/span><\/a><\/h2>\n<p class=\"MsoNormal\"><span class=\"colour\">En g\u00e9n\u00e9ral, les codes recommandent de d\u00e9finir des cas de<br \/>\ncharge distincts pour les charges d&rsquo;exploitation de toiture <\/span><span><span class=\"colour\">&nbsp;<\/span><\/span><span class=\"colour\">et de les <\/span><span><span class=\"colour\">&nbsp;<\/span><\/span><span class=\"colour\">inclure dans les combinaisons<br \/>\nde charges avec des coefficients diff\u00e9rents. Ces d\u00e9finitions sont particuli\u00e8rement<br \/>\nimportantes dans les structures m\u00e9talliques, o\u00f9 le chargement de toiture est pr\u00e9pond\u00e9rant.<\/span><\/p>\n<p class=\"MsoNormal\"><span><span>&nbsp;<img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-cf2056a0ce5a59669c02464b7728fe19.png\" style=\"max-width: 100%;height: auto;padding: 0\" data-zdeskdocid=\"img_00046433964994918586\" class=\"docsimage\" data-zdeskdocselectedclass=\"original\"><\/span><\/span><\/p>\n<p class=\"MsoNormal\"><span class=\"colour\">En cochant ces options, <\/span><span class=\"colour\">au lieu d&rsquo;utiliser &quot;<\/span><b><span class=\"colour\">Charge d&rsquo;exploitation (Q)<\/span><\/b><span class=\"colour\">&quot; pour les dalles et \u00e9l\u00e9ments de niveau toiture (tels que couverture, panne, poutre),&nbsp;<\/span><span>vous pouvez d\u00e9finir des cas de charge individuels pour&nbsp;<\/span><span class=\"colour\">:&nbsp;<\/span><span class=\"colour\">&nbsp;<\/span><\/p>\n<div><span><span class=\"colour\">1.&nbsp;<\/span><\/span><b><span class=\"colour\">Charge d&rsquo;exploitation de toiture (Qr,<br \/>\nLr selon les r\u00e9f\u00e9rentiels bas\u00e9s sur l&rsquo;ASCE)<\/span><\/b><span class=\"colour\"><br \/><\/span><\/div>\n<div><span class=\"colour\">2.&nbsp;<b>Charge de neige (S), <\/b>pour laquelle vous pouvez aussi d\u00e9finir des combinaisons de<b>&nbsp;charges de cong\u00e8res de neige (Sd1, Sd2)<\/b><br \/><\/span><\/div>\n<div><span class=\"colour\">3. <\/span><b><span class=\"colour\">Charge de pluie (R)<\/span><\/b><span class=\"colour\">&nbsp;<br \/><\/span><\/div>\n<div><span class=\"colour\"><br \/><\/span><\/div>\n<div><img decoding=\"async\" style=\"max-width: 100%;height: auto;padding: 0\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-477ccabc401eb76bf0c12a24879bf22a.png\"><\/div>\n<\/p>\n<p class=\"MsoNormal\"><span class=\"colour\">Si vous d\u00e9finissez une charge dans le champ &quot;<\/span><b><span class=\"colour\">Charge d&rsquo;exploitation (Q)<\/span><\/b><span class=\"colour\">&quot; en plus de &quot;<\/span><b><span class=\"colour\">Charge d&rsquo;exploitation de<br \/>\ntoiture (Qr)<\/span><\/b><span class=\"colour\">&quot; pour un \u00e9l\u00e9ment de<br \/>\nniveau toiture, ces deux charges seront appliqu\u00e9es ensemble. Par cons\u00e9quent, il ne<br \/>\nfaut pas d\u00e9finir de charge dans le champ &quot;Q&quot; pour ce type d&rsquo;\u00e9l\u00e9ments, sauf<br \/>\npr\u00e9f\u00e9rence sp\u00e9cifique.<\/span><\/p>\n<div>\n<div><span class=\"colour\"><\/span><\/div>\n<h2 class=\"toc_anchors\" id=\"Construction_Stages_Load_Cases\"><a name=\"_Toc52800845\"><\/a><a name=\"_Toc52801294\"><span class=\"colour\">Cas de charge des phases de construction<\/span><\/a><\/h2>\n<p class=\"MsoNormal\"><span class=\"colour\">Les cas de charges permanentes et d&rsquo;exploitation<br \/>\npeuvent \u00eatre d\u00e9finis dans le cadre d&rsquo;une phase de construction. Vous pouvez \u00e9galement pr\u00e9parer<br \/>\nun second jeu ind\u00e9pendant pour les combinaisons de phases de construction, ce qui permet<br \/>\nd&rsquo;envelopper les r\u00e9sultats avec les cas non phas\u00e9s.<\/span><\/p>\n<div><img decoding=\"async\" style=\"padding: 0px;max-width: 100%\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/hc-a297165feee1.png\"><\/div>\n<div><\/div>\n<\/p>\n<p class=\"MsoNormal\">\n<h2 class=\"toc_anchors\" id=\"Seismic_Loading\"><a name=\"_Toc52800846\"><\/a><a name=\"_Toc52801295\"><span class=\"colour\">Chargement sismique<\/span><\/a><\/h2>\n<p class=\"MsoNormal\"><span class=\"colour\">Quatre cas de charge <\/span><b><span class=\"colour\">(Ex +, Ex-, Ey +, Ey-)<\/span><\/b><span class=\"colour\"> incluant des excentricit\u00e9s <\/span><b><span class=\"colour\">positives<\/span><\/b><span class=\"colour\"> et <\/span><b><span class=\"colour\">n\u00e9gatives<\/span><\/b><span class=\"colour\"> sont d\u00e9finis pour les charges sismiques calcul\u00e9es<br \/>\nselon les codes sismiques s\u00e9lectionn\u00e9s. Les signes &quot;<\/span><b><span class=\"colour\">+<\/span><\/b><span class=\"colour\">&quot; et<br \/>\n&quot;-&quot; dans les libell\u00e9s des cas de charge indiquent le c\u00f4t\u00e9 de l&rsquo;excentricit\u00e9<br \/>\npar rapport au centre de masse de l&rsquo;\u00e9tage (c&rsquo;est-\u00e0-dire une rotation de l&rsquo;\u00e9tage dans le sens horaire ou antihoraire)<\/span><\/p>\n<\/div>\n<\/div>\n<div>\n<p class=\"MsoNormal\">\n<p class=\"MsoNormal\">\n<div><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-16c4f79f644b65ba6c12d9f652ff4b08.png\" style=\"max-width: 100%;height: auto;padding: 0\"><\/div>\n<div><span class=\"colour\">\u200b<br \/><\/span><\/div>\n<div><span class=\"colour\">En cochant&nbsp;<b>Cr\u00e9er des combinaisons sismiques sans charges d&rsquo;exploitation<\/b>, 0,9G + E, vous pouvez obtenir des r\u00e9sultats plus critiques lorsque G agit<br \/>\nfavorablement. Vous pouvez inclure cette option dans le g\u00e9n\u00e9rateur de charges.<br \/><\/span><\/div>\n<div><\/div>\n<h2 class=\"toc_anchors\" id=\"Notional_Load\"><span class=\"colour\">Charge fictive<\/span><br \/><\/h2>\n<div>\n<div><span><span class=\"colour\">Dans les pays o\u00f9 les charges de vent ou les charges sismiques ne gouvernent pas le dimensionnement, des charges lat\u00e9rales minimales, appel\u00e9es charges fictives, sont appliqu\u00e9es \u00e0 la structure au niveau de chaque \u00e9tage. Les charges d&rsquo;\u00e9tage sont g\u00e9n\u00e9ralement calcul\u00e9es comme une fraction des charges permanentes et d&rsquo;exploitation.<\/span><\/span><\/div>\n<div><span class=\"colour\"><br \/><\/span><\/div>\n<div><span class=\"colour\">Ce calcul n&rsquo;est pas simple, car les coefficients des cas de charge fictive diff\u00e8rent selon chaque code de calcul. Certains codes d\u00e9finissent des coefficients sp\u00e9cifiques, tandis que d&rsquo;autres utilisent les m\u00eames coefficients que pour les cas de charges permanentes et d&rsquo;exploitation.<\/span><\/div>\n<div><span class=\"colour\"><br \/><\/span><\/div>\n<div><span class=\"colour\">De plus, la fraction de charge PERMANENTE ou D&rsquo;EXPLOITATION utilis\u00e9e pour calculer l&rsquo;intensit\u00e9 de la charge doit \u00e9galement \u00eatre personnalisable.<\/span><\/div>\n<div><span class=\"colour\">Vous pouvez appliquer librement les charges fictives \u00e0 tout type de combinaison, avec n&rsquo;importe quel coefficient de cas de charge.<br \/><\/span><\/div>\n<div><span class=\"colour\"><br \/><\/span><\/div>\n<div><span class=\"colour\">Si vous souhaitez combiner la charge fictive avec d&rsquo;autres combinaisons de charges, assurez-vous que l&rsquo;option &quot;<b>Ajouter des combinaisons de charges fictives pour imperfections g\u00e9om\u00e9triques<\/b>&quot; est coch\u00e9e.<br \/><\/span><\/div>\n<div><span class=\"colour\"><br \/><\/span><\/div>\n<div><span class=\"colour\"><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-3892df3ff0fed5b496b86fe81eb154d7.png\" style=\"max-width: 100%;height: auto;padding: 0\"><br \/><\/span><\/div>\n<div><\/div>\n<div>D\u00e9cochez l&rsquo;option&nbsp;<span>&quot;<\/span><b>Ajouter des combinaisons de charges fictives pour imperfections g\u00e9om\u00e9triques<\/b><span>&quot;<\/span> si vous souhaitez que le chargement fictif reste s\u00e9par\u00e9 des autres combinaisons de charges.<\/div>\n<div><\/div>\n<div><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-0e0a96d332c20534b0a7a905203208be.png\" style=\"max-width: 100%;height: auto;padding: 0\"><\/div>\n<\/div>\n<div><\/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\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-e2da3a011b360ed206a308c444a8b490.png\" data-type=\"non-resize\" style=\"position: absolute;left: 12px;top: 14px;width: 15px;max-width: 100%\" data-image=\"contentStyle\" alt=\"Notes\"><\/p>\n<div>Pour plus d&rsquo;explications sur la charge fictive, consultez cet article : <a target=\"_blank\" href=\"https:\/\/support.protasoftware.com\/portal\/en\/kb\/articles\/notional-load-and-input-23-11-2021\" rel=\"noopener noreferrer\">Charge fictive et saisie<\/a><\/div>\n<p><\/span><\/div>\n<\/div>\n<div><\/div>\n<h2 class=\"toc_anchors\" id=\"Wind_Loading\"><a name=\"_Toc52800847\"><\/a><a name=\"_Toc52801296\"><span class=\"colour\">Chargement de vent<\/span><\/a><\/h2>\n<p class=\"MsoNormal\"><span class=\"colour\">En g\u00e9n\u00e9ral, deux cas de charge suffisent pour les charges de vent des<br \/>\nb\u00e2timents standards, o\u00f9 les fa\u00e7ades au vent et sous le vent sont similaires. Les combinaisons de charges<br \/>\nsont cr\u00e9\u00e9es automatiquement, s\u00e9par\u00e9ment pour les directions positive et n\u00e9gative.<\/span><\/p>\n<p class=\"MsoNormal\"><span class=\"colour\">Cependant, il est n\u00e9cessaire d&rsquo;utiliser des cas de charge<br \/>\ndiff\u00e9rents dans les directions positive et n\u00e9gative pour d\u00e9finir la charge de vent, notamment pour les b\u00e2timents<br \/>\navec des surfaces de fa\u00e7ades au vent et sous le vent diff\u00e9rentes, pour la couverture et les pannes sur<br \/>\nles toitures en pente des structures m\u00e9talliques, ainsi que pour les lisses sur leurs surfaces. \u00c0<br \/>\ncet effet, vous pouvez d\u00e9finir 4 cas de charge \u00e0 l&rsquo;aide de l&rsquo;option &quot;<\/span><b><span class=\"colour\">D\u00e9finir des cas de charge n\u00e9gatifs s\u00e9par\u00e9s<\/span><\/b><span class=\"colour\">&quot;.<\/span><\/p>\n<p class=\"MsoNormal\"><span class=\"colour\">Dans la d\u00e9finition du chargement de vent bas\u00e9 sur l&rsquo;ASCE, <\/span><b><span class=\"colour\">4 cas de charge<br \/>\n(Wx, Wmx, Wy, Wmy)<\/span><\/b><span class=\"colour\"> sont g\u00e9n\u00e9r\u00e9s par d\u00e9faut car<\/span><b><span class=\"colour\"> le moment de torsion est<br \/>\ncalcul\u00e9 pour chaque direction<\/span><\/b><span class=\"colour\">. Si vous utilisez l&rsquo;option &quot;<b>D\u00e9finir des cas de charge n\u00e9gatifs s\u00e9par\u00e9s<\/b>&quot;, vous pouvez utiliser 8 cas de charge en cr\u00e9ant des cas de charge distincts<br \/>\npour les directions n\u00e9gatives.<\/span><\/p>\n<\/div>\n<div><\/div>\n<div><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-7f8ef3ce2c3a900b4d69079cead9fdf4.png\" style=\"max-width: 100%;height: auto;padding: 0\"><\/div>\n<div>\n<div><\/div>\n<\/div>\n<div>\n<div>\n<p class=\"MsoNormal\">\n<div>\n<p class=\"MsoNormal\">\n<h2 class=\"toc_anchors\" id=\"Minimum_Horizontal_Loading\"><a name=\"_Toc52800848\"><\/a><a name=\"_Toc52801297\"><span class=\"colour\">Chargement horizontal minimal<\/span><\/a><\/h2>\n<p class=\"MsoNormal\"><span class=\"colour\">Dans les r\u00e9gions non sismiques notamment, les codes de calcul imposent<br \/>\nl&rsquo;application d&rsquo;une charge horizontale minimale (charges fictives) aux b\u00e2timents. Par<br \/>\nd\u00e9finition, cela inclut les charges lat\u00e9rales&nbsp;<br \/>\nminimales pouvant r\u00e9sulter de d\u00e9fauts de construction dans la structure et<br \/>\nqui sont g\u00e9n\u00e9ralement calcul\u00e9es en pourcentage du poids du b\u00e2timent.<\/span><\/p>\n<div><\/div>\n<h2 class=\"toc_anchors\" id=\"Soil_Pressure\"><a name=\"_Toc52800849\"><\/a><a name=\"_Toc52801298\"><span class=\"colour\">Pression du sol<\/span><\/a><\/h2>\n<p class=\"MsoNormal\"><span class=\"colour\">Vous pouvez cocher les cas de charge \u00ab Pression du sol \u00bb pour d\u00e9crire les<br \/>\neffets de la pression du sol. (Par exemple, des charges de trav\u00e9e appliqu\u00e9es aux voiles de contreventement du sous-sol,<br \/>\nou des charges d&rsquo;\u00e9tage d\u00e9finies par l&rsquo;\u00e9diteur de charges d&rsquo;\u00e9tage.)<\/span><\/p>\n<p class=\"MsoNormal\"><span class=\"colour\">Si la pression du sol est unilat\u00e9rale, il suffit de<br \/>\nd\u00e9finir un ou deux cas de charge. En cochant l&rsquo;option pour la direction concern\u00e9e,<br \/>\nvous pouvez cr\u00e9er les cas de charge de pression du sol et les combinaisons associ\u00e9es.<\/span><\/p>\n<p class=\"MsoNormal\"><span class=\"colour\">Les codes de calcul proposent diff\u00e9rents coefficients de combinaison pour les<br \/>\ncas de charge de sol, selon que la pression du sol s&rsquo;applique favorablement ou<br \/>\nd\u00e9favorablement&nbsp; avec les autres charges horizontales.<br \/>\nDans ce cas, vous devez pr\u00e9ciser la direction d&rsquo;application de la charge. Par<br \/>\nexemple, si &quot;n\u00e9gatif&quot; est s\u00e9lectionn\u00e9 pour la direction 1, le coefficient<br \/>\nde charge de sol sera &quot;0,9&quot; pour le chargement sismique dans la direction<br \/>\npositive, et &quot;1,6&quot; pour le chargement sismique dans cette m\u00eame direction<br \/>\nn\u00e9gative.<\/span><\/p>\n<p class=\"MsoNormal\"><span class=\"colour\">Cependant, si vous souhaitez d\u00e9finir des cas de charge positifs et<br \/>\nn\u00e9gatifs distincts dans les deux directions, vous pouvez cocher l&rsquo;option &quot;<\/span><b><span class=\"colour\">D\u00e9finir des cas de charge n\u00e9gatifs s\u00e9par\u00e9s<\/span><\/b><span class=\"colour\">&quot; pour cr\u00e9er 4 \u00e9tats de charge (P+x, P-x, P+y, P-y).<br \/><\/span><\/p>\n<div><\/div>\n<div><img decoding=\"async\" src=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/04\/prota-doc-8e8f578da364171ec988d6078c8586c4.png\" style=\"max-width: 100%;height: auto;padding: 0\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<div><\/div>\n<p><strong>T\u00e9l\u00e9chargements<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/protasoftware.com\/wp-content\/uploads\/2026\/09\/ProtaStructure_Design_Guide_Loading_Generator.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">ProtaStructure_Design_Guide_Loading_Generator<\/a> (0.7 MB)<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Champ d&rsquo;application ProtaStructure peut g\u00e9n\u00e9rer automatiquement les combinaisons de charges requises par diff\u00e9rents codes de calcul. Pour g\u00e9n\u00e9rer les combinaisons de charges automatiquement, utilisez 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":[54],"whitepaper_topic":[],"whitepaper_product":[],"whitepaper_type":[],"class_list":["post-1998","wiki","type-wiki","status-publish","hentry","category-protastructure-design-guides"],"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>Guide de conception du g\u00e9n\u00e9rateur de charges ProtaStructure<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez comment utiliser le g\u00e9n\u00e9rateur de charges de ProtaStructure pour d\u00e9finir et calculer les charges appliqu\u00e9es \u00e0 vos mod\u00e8les structurels.\" \/>\n<meta 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