{"id":36781,"date":"2026-01-30T15:55:47","date_gmt":"2026-01-30T15:55:47","guid":{"rendered":"https:\/\/cortartec.net\/produto\/armaduras-anti-puncoamento\/"},"modified":"2026-05-15T10:41:54","modified_gmt":"2026-05-15T10:41:54","slug":"armatures-anti-perforation","status":"publish","type":"product","link":"https:\/\/cortartec.net\/fr\/produto\/armatures-anti-perforation\/","title":{"rendered":"Armatures anti-perforation"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text css=\u00a0\u00bb\u00a0\u00bb woodmart_inline=\u00a0\u00bbno\u00a0\u00bb text_larger=\u00a0\u00bbno\u00a0\u00bb]<\/p>\n

RENFORTS D’ARMATURES ANTI-POIN\u00c7ONNEMENT <\/strong><\/h2>\n

Le poids d’une dalle reposant sur un poteau induit des contraintes de cisaillement dans la dalle. Ces contraintes, si elles sont suffisantes et en l’absence de renfort suppl\u00e9mentaire, entra\u00eeneraient le \u00ab per\u00e7age \u00bb de la dalle par le poteau. Ce cisaillement de perforation est \u00e9galement induit \u00e0 la base sur laquelle repose le poteau. Bien que le cisaillement de perforation puisse \u00eatre att\u00e9nu\u00e9 par un \u00e9paississement localis\u00e9 du b\u00e9ton au niveau des poutres de support et des t\u00eates de poteaux \u00e9largies, la construction de dalles plates offre de nombreux avantages. Une hauteur libre constante peut r\u00e9duire la hauteur totale d\u2019un b\u00e2timent et permettre des \u00e9conomies significatives de temps et de mat\u00e9riaux.<\/p>\n

Dispositions typiques<\/strong><\/h2>\n

Notre syst\u00e8me Shearfix convient \u00e0 toutes les formes et tous les emplacements de poteaux. La disposition des rails Shearfix est d\u00e9termin\u00e9e par le calcul de la conception ou par le logiciel de conception. Certaines des dispositions typiques sont pr\u00e9sent\u00e9es ici.<\/p>\n

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Le poids d’une dalle d’appui sur un poteau induit des contraintes de cisaillement dans la dalle. Ces contraintes, si elles sont suffisantes et qu’aucun renfort suppl\u00e9mentaire n’est pr\u00e9vu, entra\u00eenent un \u00ab poin\u00e7onnement \u00bb de la dalle par le poteau. Cet effet de poin\u00e7onnement est \u00e9galement induit \u00e0 la base du poteau. Bien que le poin\u00e7onnement puisse \u00eatre att\u00e9nu\u00e9 par des \u00e9paississement localis\u00e9 du b\u00e9ton d\u00fb aux poutres suspendues et att\u00e9nu\u00e9 par les chapiteaux en saillie des poteaux, la construction de dalles planes offre de nombreux avantages. Cortartec Shearfix est la solution id\u00e9ale pour la conception et la construction dans les cas de probl\u00e8mes li\u00e9s au poin\u00e7onnement. Le syst\u00e8me se compose de connecteurs \u00e0 deux t\u00eates soud\u00e9s \u00e0 des barres plates, qui sont positionn\u00e9s autour du sommet du poteau ou \u00e0 sa base. La force de cisaillement de la dalle est transf\u00e9r\u00e9e \u00e0 l’int\u00e9rieur de la colonne par l’interm\u00e9diaire des connecteurs. Les connecteurs sont soud\u00e9s au rail \u00e0 des centres d\u00e9termin\u00e9s par le calcul de la conception. Cortartec Shearfix convient \u00e0 toutes les formes de colonnes et est tr\u00e8s facile \u00e0 installer \u00ab de haut en bas \u00bb ou \u00ab de bas en haut \u00bb, selon la pr\u00e9f\u00e9rence sur le chantier.[\/vc_column_text]\t\t

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Mises en page radiales<\/h2>\n\t\t<\/div>\r\n\t\t[\/vc_column][\/vc_row][vc_row][vc_column width=\u00a0\u00bb1\/3″][vc_single_image image=\u00a0\u00bb38002″ img_size=\u00a0\u00bbfull\u00a0\u00bb css=\u00a0\u00bb\u00a0\u00bb parallax_scroll=\u00a0\u00bbno\u00a0\u00bb woodmart_inline=\u00a0\u00bbno\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/3″][vc_single_image image=\u00a0\u00bb38003″ img_size=\u00a0\u00bbfull\u00a0\u00bb css=\u00a0\u00bb\u00a0\u00bb parallax_scroll=\u00a0\u00bbno\u00a0\u00bb woodmart_inline=\u00a0\u00bbno\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/3″][vc_single_image image=\u00a0\u00bb38004″ img_size=\u00a0\u00bbfull\u00a0\u00bb css=\u00a0\u00bb\u00a0\u00bb parallax_scroll=\u00a0\u00bbno\u00a0\u00bb woodmart_inline=\u00a0\u00bbno\u00a0\u00bb][\/vc_column][\/vc_row][vc_row][vc_column]\t\t
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Dispositions en croix<\/h2>\n\t\t<\/div>\r\n\t\t[\/vc_column][\/vc_row][vc_row][vc_column width=\u00a0\u00bb1\/3″][vc_single_image image=\u00a0\u00bb38005″ img_size=\u00a0\u00bbfull\u00a0\u00bb css=\u00a0\u00bb\u00a0\u00bb parallax_scroll=\u00a0\u00bbno\u00a0\u00bb woodmart_inline=\u00a0\u00bbno\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/3″][vc_single_image image=\u00a0\u00bb38006″ img_size=\u00a0\u00bbfull\u00a0\u00bb css=\u00a0\u00bb\u00a0\u00bb parallax_scroll=\u00a0\u00bbno\u00a0\u00bb woodmart_inline=\u00a0\u00bbno\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb1\/3″][vc_single_image image=\u00a0\u00bb38007″ img_size=\u00a0\u00bbfull\u00a0\u00bb css=\u00a0\u00bb\u00a0\u00bb parallax_scroll=\u00a0\u00bbno\u00a0\u00bb woodmart_inline=\u00a0\u00bbno\u00a0\u00bb][\/vc_column][\/vc_row][vc_row][vc_column width=\u00a0\u00bb1\/4″][vc_single_image image=\u00a0\u00bb38008″ img_size=\u00a0\u00bbfull\u00a0\u00bb css=\u00a0\u00bb\u00a0\u00bb parallax_scroll=\u00a0\u00bbno\u00a0\u00bb woodmart_inline=\u00a0\u00bbno\u00a0\u00bb][\/vc_column][vc_column width=\u00a0\u00bb3\/4″]\t\t
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Dimensions\/Configurations<\/strong><\/h3>\n

Le syst\u00e8me Shearfix est constitu\u00e9 de tiges \u00e0 double t\u00eate soud\u00e9es \u00e0 des rails plats. Il est fabriqu\u00e9 pour r\u00e9pondre aux besoins sp\u00e9cifiques de chaque application. Les vis sont fabriqu\u00e9es en cinq diam\u00e8tres (10, 12, 16, 20 et 25 mm) \u00e0 partir de barres d’armature homologu\u00e9es CARES B500C. Les t\u00eates sont forg\u00e9es \u00e0 chaud \u00e0 trois fois le diam\u00e8tre de la barre. Les vis sont fabriqu\u00e9es dans pratiquement toutes les longueurs pour s’adapter \u00e0 la profondeur de la dalle, mais elles sont g\u00e9n\u00e9ralement produites par incr\u00e9ments de 5 mm dans une plage de 100 \u00e0 1 000 mm. La barre utilis\u00e9e dans ce syst\u00e8me pr\u00e9sente une limite d’\u00e9lasticit\u00e9 caract\u00e9ristique de 500 N\/mm\u00b2. Les goujons sont soud\u00e9s au rail aux emplacements d\u00e9termin\u00e9s par le calcul de conception. Les rails Shearfix sont fabriqu\u00e9s \u00e0 partir de bandes d’acier de 16 mm de largeur x 3 mm d’\u00e9paisseur pour les vis jusqu’\u00e0 16 mm de diam\u00e8tre, et de 20 mm x 5 mm pour les deux diam\u00e8tres de tige. Les barres ont des extr\u00e9mit\u00e9s arrondies afin de r\u00e9duire le risque de blessures lors de la manipulation. L’espace entre les bandes permet le passage du b\u00e9ton lors du coulage et permet \u00e9galement \u00e0 la barre d’\u00eatre clou\u00e9e \u00e0 l’aide d’entretoises au coffrage lorsqu’elle est fix\u00e9e \u00ab de bas en haut \u00bb, c’est-\u00e0-dire avant tout autre armature.<\/p>\n\t\t<\/div>\r\n\t\t[\/vc_column][\/vc_row]<\/p>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

Fiche technique<\/a><\/strong><\/span>
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