{"id":30824,"date":"2018-06-26T09:23:36","date_gmt":"2018-06-26T09:23:36","guid":{"rendered":"https:\/\/support.buildsoft.eu\/knowledge-base\/pourquoi-un-modele-3d-diamonds-donne-t-il-des-resultats-differents-de-ceux-obtenus-par-des-calculs-manuels\/"},"modified":"2018-06-26T09:23:36","modified_gmt":"2018-06-26T09:23:36","slug":"pourquoi-un-modele-3d-diamonds-donne-t-il-des-resultats-differents-de-ceux-obtenus-par-des-calculs-manuels","status":"publish","type":"ht_kb","link":"https:\/\/support.buildsoft.eu\/fr\/knowledge-base\/pourquoi-un-modele-3d-diamonds-donne-t-il-des-resultats-differents-de-ceux-obtenus-par-des-calculs-manuels\/","title":{"rendered":"Pourquoi un mod\u00e8le 3D Diamonds donne-t-il des r\u00e9sultats diff\u00e9rents de ceux obtenus par des calculs manuels ?"},"content":{"rendered":"<h3>Raison<\/h3>\n<p>Diamonds montre le comportement r\u00e9el de la structure, tandis que les calculs manuels\/raisonnement quotidien font des hypoth\u00e8ses qui ne sont valable que pour certaines cas. Par exemple :<\/p>\n<ul>\n<li>Les calculs manuels d\u2019une plaque ne sont valables que pour une bande au milieu de la plaque, assez loin des bords.<\/li>\n<li>Des pr\u00e9dalles sont un type de plaque o\u00f9 le comportement est une plaque bidirectionnelle plut\u00f4t qu\u2019une plaque unidirectionnelle. N\u00e9anmoins, dans les calculs manuels, une pr\u00e9dalle est g\u00e9n\u00e9ralement approch\u00e9e par un comportement unidirectionnel.<\/li>\n<\/ul>\n<p>Si les hypoth\u00e8ses utilis\u00e9es lors des calculs manuels sont mod\u00e9lis\u00e9es dans Diamonds, Diamonds donnera des r\u00e9sultats similaires aux calculs manuels.<\/p>\n<p>La question est si ces hypoth\u00e8ses de calcul manuel r\u00e9pondent au comportement r\u00e9el de la structure? Si les conditions de bords et le comportement de la plaque sont repr\u00e9sentatifs pour le comportement r\u00e9el de la structure, les r\u00e9sultats de Diamonds sont les plus corrects.<\/p>\n<h3>Exemple<\/h3>\n<p>Consid\u00e9rons l\u2019exemple ci-dessous (mod\u00e8le joint \u00e0 la fin de cet article). Les murs ont \u00e9t\u00e9 rendus invisibles. La charge est 12kN\/m\u00b2 sur le toit et la plaque. A l\u2019aide de calculs manuels, un moment fl\u00e9chissant de 167 kNm est attendu dans la poutre. Pourtant, Diamonds donne un moment fl\u00e9chissant de 4,0 kNm\u2026<\/p>\n<p style=\"text-align: center;\">\\[{q=12kN\/m^2 \\cdot 0.5 \\cdot 5.5m \\cdot 2 = 66kN\/m}\\]\n<p style=\"text-align: center;\">\\[M_y=\\frac{66kN\/m \\cdot]\n<table>\n<tbody>\n<tr>\n<th>G\u00e9om\u00e9trie (les murs ont \u00e9t\u00e9 rendus invisibles)<\/th>\n<th>R\u00e9sultat en Diamonds pour My<\/th>\n<\/tr>\n<tr>\n<td> <img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-4000\" src=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand5.png\" alt=\"\" width=\"731\" height=\"436\" srcset=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand5.png 731w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand5-300x179.png 300w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand5-50x30.png 50w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand5-60x36.png 60w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand5-35x21.png 35w\" sizes=\"(max-width: 731px) 100vw, 731px\" \/><\/td>\n<td> <img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-large wp-image-3999\" src=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand4.png\" alt=\"\" width=\"643\" height=\"381\" srcset=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand4.png 730w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand4-300x178.png 300w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand4-50x30.png 50w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand4-60x36.png 60w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand4-35x21.png 35w\" sizes=\"(max-width: 643px) 100vw, 643px\" \/><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Les modifications suivantes ont \u00e9t\u00e9 apport\u00e9es pour faire correspondre les r\u00e9sultats des Diamonds avec les calculs manuels:<\/p>\n<ul>\n<li>S\u00e9lectionnez tous les murs. D\u00e9sactivez l\u2019option \u00abAu bord sup\u00e9rieur: pas de traction\u00bb. \u00abAu bord sup\u00e9rieur: pas de traction\u00bb est quelque chose que vous ne pouvez pas simuler dans de simples calculs manuels. D\u00e9sactivez l\u2019option \u00abAu bord sup\u00e9rieur: pas de traction\u00bb. \u00abAu bord sup\u00e9rieur: pas de traction\u00bb est quelque chose que vous ne pouvez pas simuler dans de simples calculs manuels. \u00abAu bord sup\u00e9rieur: pas de traction\u00bb est quelque chose que vous ne pouvez pas simuler dans de simples calculs manuels.<\/li>\n<\/ul>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-large wp-image-1682 aligncenter\" src=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D1-1024x587.png\" alt=\"\" width=\"643\" height=\"369\" srcset=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D1-1024x587.png 1024w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D1-300x172.png 300w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D1-768x440.png 768w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D1-50x29.png 50w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D1-60x34.png 60w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D1-35x20.png 35w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D1.png 1267w\" sizes=\"(max-width: 643px) 100vw, 643px\" \/><\/p>\n<ul>\n<li>D\u00e9finissez les plaques portant en une direction au lieu des pr\u00e9dalles. Le calcul manuel suppose que 50% de la charge va \u00e0 la poutre. Cela n\u2019est vrai que si les plaques portent en une direction.<\/li>\n<\/ul>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-large wp-image-1681 aligncenter\" src=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D2-1024x587.png\" alt=\"\" width=\"643\" height=\"369\" srcset=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D2-1024x587.png 1024w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D2-300x172.png 300w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D2-768x440.png 768w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D2-50x29.png 50w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D2-60x34.png 60w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D2-35x20.png 35w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D2.png 1267w\" sizes=\"(max-width: 643px) 100vw, 643px\" \/><\/p>\n<ul>\n<li>Ajoutez des rotules sur les extr\u00e9mit\u00e9s de la poutre.<\/li>\n<\/ul>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-large wp-image-1680 aligncenter\" src=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D3-1024x587.png\" alt=\"\" width=\"643\" height=\"369\" srcset=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D3-1024x587.png 1024w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D3-300x172.png 300w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D3-768x440.png 768w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D3-50x29.png 50w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D3-60x34.png 60w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D3-35x20.png 35w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D3.png 1267w\" sizes=\"(max-width: 643px) 100vw, 643px\" \/><\/p>\n<ul>\n<li>Donnez les poutres une excentricit\u00e9s. Autorisez uniquement le transfert de la force normale dans les liens rigides. Autorisez uniquement le transfert de la force normale dans les liens rigides.<\/li>\n<\/ul>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"size-large wp-image-1679 aligncenter\" src=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4-1024x587.png\" alt=\"\" width=\"643\" height=\"369\" srcset=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4-1024x587.png 1024w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4-300x172.png 300w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4-768x440.png 768w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4-50x29.png 50w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4-60x34.png 60w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4-35x20.png 35w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4.png 1267w\" sizes=\"(max-width: 643px) 100vw, 643px\" \/><\/p>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"size-large wp-image-1678 aligncenter\" src=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4a-1024x587.png\" alt=\"\" width=\"643\" height=\"369\" srcset=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4a-1024x587.png 1024w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4a-300x172.png 300w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4a-768x440.png 768w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4a-50x29.png 50w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4a-60x34.png 60w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4a-35x20.png 35w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D4a.png 1267w\" sizes=\"(max-width: 643px) 100vw, 643px\" \/><\/p>\n<ul>\n<li>Ajoutez des lignes d\u2019articulation sur les bords des plaques.\n<ul>\n<li>D\u00e9sactivez le transfert du moment, de la force normale et de la force transversale dans le plan pour tous les bords.&nbsp;<img decoding=\"async\" loading=\"lazy\" class=\"size-large wp-image-1677 aligncenter\" src=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5a-1024x587.png\" alt=\"\" width=\"643\" height=\"369\" srcset=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5a-1024x587.png 1024w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5a-300x172.png 300w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5a-768x440.png 768w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5a-50x29.png 50w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5a-60x34.png 60w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5a-35x20.png 35w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5a.png 1267w\" sizes=\"(max-width: 643px) 100vw, 643px\" \/><\/li>\n<li>D\u00e9sactivez aussi le transfert de la force tranchant pour tous les bords parall\u00e8les \u00e0 la direction principale.<img decoding=\"async\" loading=\"lazy\" class=\"size-large wp-image-1676 aligncenter\" src=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5-1024x587.png\" alt=\"\" width=\"643\" height=\"369\" srcset=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5-1024x587.png 1024w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5-300x172.png 300w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5-768x440.png 768w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5-50x29.png 50w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5-60x34.png 60w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5-35x20.png 35w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2017\/10\/3D5.png 1267w\" sizes=\"(max-width: 643px) 100vw, 643px\" \/><\/li>\n<\/ul>\n<\/li>\n<li>Le mod\u00e8le Diamonds aborde maintenant bien les calculs manuels:<\/li>\n<\/ul>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"size-large wp-image-4002 aligncenter\" src=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand6-1024x694.png\" alt=\"\" width=\"643\" height=\"436\" srcset=\"https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand6-1024x694.png 1024w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand6-300x203.png 300w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand6-768x520.png 768w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand6-50x34.png 50w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand6-60x41.png 60w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand6-35x24.png 35w, https:\/\/support.buildsoft.eu\/wp-content\/uploads\/2018\/06\/3DvsHand6.png 1058w\" sizes=\"(max-width: 643px) 100vw, 643px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Raison Diamonds montre le comportement r\u00e9el de la structure, tandis que les calculs manuels\/raisonnement quotidien font des hypoth\u00e8ses qui ne sont valable que pour certaines cas. Par exemple : Les calculs manuels d\u2019une plaque ne sont valables que pour une bande au milieu de la plaque, assez loin des bords&#8230;.<\/p>\n","protected":false},"author":3,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":[],"ht-kb-category":[59],"ht-kb-tag":[1348],"_links":{"self":[{"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb\/30824"}],"collection":[{"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/comments?post=30824"}],"version-history":[{"count":0,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb\/30824\/revisions"}],"wp:attachment":[{"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/media?parent=30824"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb-category?post=30824"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/support.buildsoft.eu\/fr\/wp-json\/wp\/v2\/ht-kb-tag?post=30824"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}