{"id":8765,"date":"2024-07-12T13:53:20","date_gmt":"2024-07-12T13:53:20","guid":{"rendered":"https:\/\/www.buildsoft.eu\/reference-projects\/osea\/"},"modified":"2026-07-29T09:10:48","modified_gmt":"2026-07-29T09:10:48","slug":"osea","status":"publish","type":"reference-project","link":"https:\/\/www.buildsoft.eu\/fr\/references\/osea\/","title":{"rendered":"O&rsquo;sea"},"content":{"rendered":"\n<p>La tour r\u00e9sidentielle O&rsquo;Sea \u00e0 Ostende, con\u00e7ue par CONIX RDBM Architects et construite par Interbuild, a un plan rectangulaire simple de 17 par 25 m\u00e8tres qui pivote de plus de 2,5\u00b0 par \u00e9tage sur quatre niveaux cons\u00e9cutifs, d\u00e9calant le point d&rsquo;angle le plus \u00e9loign\u00e9 d&rsquo;environ 5,5 m\u00e8tres sur l&rsquo;ensemble de ces \u00e9tages et donnant \u00e0 la tour son aspect d\u00e9form\u00e9 caract\u00e9ristique. Stedec NV a utilis\u00e9 un mod\u00e8le 3D Diamonds pour g\u00e9rer la charge de torsion qui en r\u00e9sulte, en s&rsquo;appuyant sur un noyau central rigide et des voiles en b\u00e9ton rayonnants pour l&rsquo;absorber, et a constat\u00e9 que le poids propre du b\u00e2timent, et non le vent, provoquait les d\u00e9formations horizontales les plus importantes.<\/p>\n\n<h2 class=\"wp-block-heading\">Le projet<\/h2>\n\n<p>\u00ab La tour O&rsquo;Sea \u00e0 Ostende, un projet du bureau d&rsquo;architecture CONIX RDBM Architects actuellement construit par Interbuild, est l&rsquo;un des projets phares parmi les nombreux projets exigeants que nous avons men\u00e9s ces derni\u00e8res ann\u00e9es \u00bb, commence Koen Coelus. \u00ab Le projet O&rsquo;Sea comprend une s\u00e9rie de b\u00e2timents plus bas, mais le v\u00e9ritable point d&rsquo;attraction est la tour r\u00e9sidentielle de 16 \u00e9tages. Le plan de cette tour est assez simple : un rectangle de 17 par 25 m\u00e8tres. Ce qui distingue ce b\u00e2timent, c&rsquo;est que sur quatre niveaux cons\u00e9cutifs, le plan pivote de plus de 2,5\u00b0 par rapport \u00e0 l&rsquo;un des coins, donnant \u00e0 la tour son aspect d\u00e9form\u00e9 caract\u00e9ristique. Il n&rsquo;est donc pas surprenant que la gestion des charges de torsion soit le principal d\u00e9fi structurel de ce b\u00e2timent. \u00bb<\/p>\n\n<h2 class=\"wp-block-heading\">G\u00e9rer un d\u00e9calage de 5,5 m\u00e8tres sur quatre \u00e9tages pivot\u00e9s<\/h2>\n\n<p>\u00ab Pour comprendre ce qui se passe ici \u00bb, explique Maarten Vervaet, \u00ab il est int\u00e9ressant de zoomer sur les quatre \u00e9tages qui sont au c\u0153ur de cette histoire. Bien qu&rsquo;une rotation de plus de 2,5\u00b0 par \u00e9tage ne semble pas \u00e9norme, cela implique que le point d&rsquo;angle le plus \u00e9loign\u00e9 de chaque \u00e9tage se d\u00e9place horizontalement d&rsquo;environ 137 cm. Si l&rsquo;on consid\u00e8re cela sur les quatre \u00e9tages combin\u00e9s, il est \u00e9vident qu&rsquo;un d\u00e9calage de 5,5 m ne peut pas rester sans cons\u00e9quence sur l&rsquo;agencement des espaces de vie de ce b\u00e2timent. Les cloisons int\u00e9rieures doivent \u00eatre d\u00e9plac\u00e9es pour garantir des espaces de vie spacieux et confortables aux r\u00e9sidents de chaque \u00e9tage. Et les colonnes doivent \u00e9galement suivre la rotation des quatre \u00e9tages, afin de transf\u00e9rer les charges permanentes et d&rsquo;exploitation vers les \u00e9tages inf\u00e9rieurs.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"906\" height=\"392\" src=\"https:\/\/www.buildsoft.eu\/wp-content\/uploads\/2024\/07\/cbp_stedec_osea_extra2.png\" alt=\"\" class=\"wp-image-5043\" srcset=\"https:\/\/www.buildsoft.eu\/wp-content\/uploads\/2024\/07\/cbp_stedec_osea_extra2.png 906w, https:\/\/www.buildsoft.eu\/wp-content\/uploads\/2024\/07\/cbp_stedec_osea_extra2-300x130.png 300w, https:\/\/www.buildsoft.eu\/wp-content\/uploads\/2024\/07\/cbp_stedec_osea_extra2-768x332.png 768w\" sizes=\"auto, (max-width: 906px) 100vw, 906px\" \/><figcaption class=\"wp-element-caption\"><em>Sur quatre niveaux cons\u00e9cutifs, le plan rectangulaire de la tour O&rsquo;Sea pivote de plus de 2,5\u00b0 par rapport \u00e0 l&rsquo;un des coins. Pour tenir compte des d\u00e9calages horizontaux associ\u00e9s, les cloisons int\u00e9rieures doivent \u00eatre d\u00e9plac\u00e9es et les colonnes doivent suivre la rotation.<\/em><\/figcaption><\/figure>\n\n<p>La rotation des quatre \u00e9tages par rapport \u00e0 un point d&rsquo;angle cr\u00e9e une excentricit\u00e9 entre les r\u00e9sultantes des charges permanentes des niveaux successifs. Il en r\u00e9sulte une charge de torsion sur la structure porteuse. Cette charge de torsion induit des d\u00e9formations horizontales m\u00eame lorsque la structure du b\u00e2timent n&rsquo;est soumise qu&rsquo;\u00e0 des charges verticales. L&rsquo;analyse et la ma\u00eetrise de ces d\u00e9formations constituent l&rsquo;un des d\u00e9fis que nous avons r\u00e9solus gr\u00e2ce \u00e0 une analyse structurelle 3D avec Diamonds.<\/p>\n\n<h2 class=\"wp-block-heading\">Un noyau central rigide absorbant la charge de torsion<\/h2>\n\n<p>Le noyau central rigide de la tour O&rsquo;Sea joue \u00e0 cet \u00e9gard un r\u00f4le crucial. \u00c0 partir du noyau central, des voiles porteurs en b\u00e9ton rayonnent vers la fa\u00e7ade du b\u00e2timent. Ces voiles sont rigidement connect\u00e9s aux dalles de plancher, ce qui conf\u00e8re la rigidit\u00e9 torsionnelle n\u00e9cessaire pour r\u00e9sister \u00e0 la charge de torsion sur la structure du b\u00e2timent. Les dalles rigides absorbent la composante horizontale de la charge de torsion et transf\u00e8rent les charges horizontales associ\u00e9es vers les voiles en b\u00e9ton et le noyau central. Cela permet de concevoir les colonnes inclin\u00e9es comme articul\u00e9es aux deux extr\u00e9mit\u00e9s. Des colonnes verticales suppl\u00e9mentaires sont pr\u00e9vues l\u00e0 o\u00f9 il est n\u00e9cessaire de soutenir des cloisons int\u00e9rieures porteuses.<\/p>\n\n<p>Comme mentionn\u00e9 pr\u00e9c\u00e9demment, l&rsquo;analyse des d\u00e9formations horizontales \u00e9tait l&rsquo;un des objectifs les plus importants de l&rsquo;analyse structurelle 3D avec Diamonds. En effet, ces analyses ont confirm\u00e9 que les charges permanentes, en particulier le poids propre, avaient de loin l&rsquo;impact le plus significatif sur les d\u00e9formations horizontales. Les d\u00e9formations horizontales sous l&rsquo;effet des charges de vent se sont r\u00e9v\u00e9l\u00e9es m\u00eame plus faibles que les d\u00e9formations horizontales dues au poids propre du b\u00e2timent. \u00bb<\/p>\n\n<h2 class=\"wp-block-heading\">Ouvrir de nouveaux horizons<\/h2>\n\n<p>\u00ab Bien que notre portefeuille de projets couvre un large \u00e9ventail de structures de b\u00e2timents, cette tour est typique de notre fa\u00e7on de penser et de travailler \u00bb, conclut Koen Coelus. \u00ab Depuis 1985, j&rsquo;ai vu le secteur de la construction \u00e9voluer de mani\u00e8re spectaculaire. C&rsquo;est uniquement en restant attentifs \u00e0 ces changements que Stedec NV est devenu ce qu&rsquo;il est aujourd&rsquo;hui. Ouvrir de nouveaux horizons, voil\u00e0 ce qui compte pour nous. Ou peut-\u00eatre serait-il plus juste de dire : ouvrir de nouvelles lignes d&rsquo;horizon ? \u00bb<\/p>\n\n<h2 class=\"wp-block-heading\" id=\"FAQ\">FAQ<\/h2>\n<div class=\"wp-block-uagb-faq uagb-faq__outer-wrap uagb-block-31692949 uagb-faq-icon-row uagb-faq-layout-accordion uagb-faq-expand-first-true uagb-faq-inactive-other-true uagb-faq__wrap uagb-buttons-layout-wrap uagb-faq-equal-height     \" data-faqtoggle=\"true\" role=\"tablist\"><script type=\"application\/ld+json\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@type\":\"FAQPage\",\"@id\":\"https:\\\/\\\/www.buildsoft.eu\\\/fr\\\/references\\\/osea\\\/\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Pourquoi le poids propre d'un b\\u00e2timent provoquerait-il plus de d\\u00e9formation horizontale que la charge de vent ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Dans une tour dont la charge de torsion est inscrite dans la g\\u00e9om\\u00e9trie m\\u00eame, comme les dalles pivot\\u00e9es d'O'Sea, l'excentricit\\u00e9 entre les r\\u00e9sultantes des charges permanentes sur des \\u00e9tages successifs cr\\u00e9e un effet de torsion d\\u00e9j\\u00e0 pr\\u00e9sent sous la seule gravit\\u00e9, avant m\\u00eame que le vent n'entre en jeu. Comme le poids propre agit sur chaque \\u00e9tage, en permanence, cet effet de torsion inh\\u00e9rent s'accumule continuellement sur toute la hauteur du b\\u00e2timent. La charge de vent, en revanche, est une action horizontale variable contre laquelle le noyau rigide en torsion et les voiles rayonnants sont sp\\u00e9cifiquement con\\u00e7us pour r\\u00e9sister. Lorsque la g\\u00e9om\\u00e9trie elle-m\\u00eame est la principale source de torsion, il n'est pas rare que les charges permanentes finissent par gouverner les d\\u00e9formations horizontales davantage que le vent.\"}}]}<\/script><div class=\"wp-block-uagb-faq-child uagb-faq-child__outer-wrap uagb-faq-item uagb-block-87a05934 \" role=\"tab\" tabindex=\"0\"><div class=\"uagb-faq-questions-button uagb-faq-questions\">\t\t\t<span class=\"uagb-icon uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M432 256c0 17.69-14.33 32.01-32 32.01H256v144c0 17.69-14.33 31.99-32 31.99s-32-14.3-32-31.99v-144H48c-17.67 0-32-14.32-32-32.01s14.33-31.99 32-31.99H192v-144c0-17.69 14.33-32.01 32-32.01s32 14.32 32 32.01v144h144C417.7 224 432 238.3 432 256z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<span class=\"uagb-icon-active uagb-faq-icon-wrap\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox= \"0 0 448 512\"><path d=\"M400 288h-352c-17.69 0-32-14.32-32-32.01s14.31-31.99 32-31.99h352c17.69 0 32 14.3 32 31.99S417.7 288 400 288z\"><\/path><\/svg>\n\t\t\t\t\t\t\t<\/span>\n\t\t\t<span class=\"uagb-question\">Pourquoi le poids propre d&rsquo;un b\u00e2timent provoquerait-il plus de d\u00e9formation horizontale que la charge de vent ?<\/span><\/div><div class=\"uagb-faq-content\"><p>Dans une tour dont la charge de torsion est inscrite dans la g\u00e9om\u00e9trie m\u00eame, comme les dalles pivot\u00e9es d&rsquo;O&rsquo;Sea, l&rsquo;excentricit\u00e9 entre les r\u00e9sultantes des charges permanentes sur des \u00e9tages successifs cr\u00e9e un effet de torsion d\u00e9j\u00e0 pr\u00e9sent sous la seule gravit\u00e9, avant m\u00eame que le vent n&rsquo;entre en jeu. Comme le poids propre agit sur chaque \u00e9tage, en permanence, cet effet de torsion inh\u00e9rent s&rsquo;accumule continuellement sur toute la hauteur du b\u00e2timent. La charge de vent, en revanche, est une action horizontale variable contre laquelle le noyau rigide en torsion et les voiles rayonnants sont sp\u00e9cifiquement con\u00e7us pour r\u00e9sister. Lorsque la g\u00e9om\u00e9trie elle-m\u00eame est la principale source de torsion, il n&rsquo;est pas rare que les charges permanentes finissent par gouverner les d\u00e9formations horizontales davantage que le vent.<\/p><\/div><\/div><\/div>","protected":false},"author":6,"template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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