{"id":727,"date":"2024-01-18T18:02:00","date_gmt":"2024-01-18T18:02:00","guid":{"rendered":"https:\/\/site.ibracon.org.br\/Site_revista\/Concreto_Construcoes\/Concreto_blog\/?p=727"},"modified":"2025-07-31T02:05:23","modified_gmt":"2025-07-31T02:05:23","slug":"norma-sismos","status":"publish","type":"post","link":"https:\/\/site.ibracon.org.br\/Site_revista\/Concreto_Construcoes\/Concreto_blog\/press-releases\/norma-sismos\/","title":{"rendered":"<strong>Altera\u00e7\u00f5es na ABNT NBR 15421 Projeto de estruturas resistentes a sismos<\/strong>"},"content":{"rendered":"\n<p>Apesar de a norma brasileira ABNT NBR 15421 Projeto de estruturas resistentes a sismos ser dispensada para estruturas localizadas em cerca de 80% do territ\u00f3rio nacional, ela tem se difundido em projetos contempor\u00e2neos.<\/p>\n\n\n\n<p>A norma apareceu pela primeira vez em 2006 e, ap\u00f3s 16 anos em vigor, ela foi revisada. As duas principais modifica\u00e7\u00f5es na nova vers\u00e3o da norma foram: corre\u00e7\u00f5es no mapa de perigo s\u00edsmico e ajustes no formato do espectro de resposta do projeto.<\/p>\n\n\n\n<p>O novo mapa, baseado na disserta\u00e7\u00e3o de mestrado defendida, em 2020, na Universidade Federal do Rio de Janeiro, possui a fronteira entre as zonas 0 e 1 mais para dentro do Mato Grosso, onde aparecem novas zonas 2.<\/p>\n\n\n\n<p>Dois artigos na edi\u00e7\u00e3o 111 da Revista CONCRETO &amp; Constru\u00e7\u00f5es abordam as mudan\u00e7as na norma. No artigo \u201c<a href=\"https:\/\/concretoeconstrucoes.org.br\/index.php\/revista\/edicao-111-artigo-001\" target=\"_blank\" rel=\"noreferrer noopener\">Aplica\u00e7\u00e3o dos crit\u00e9rios e m\u00e9todos da NBR 15421<\/a>\u201d, apresenta-se um roteiro completo de projeto associado a um exemplo de c\u00e1lculo que discute as fases de defini\u00e7\u00e3o dos par\u00e2metros e crit\u00e9rios estabelecidos pela nova norma.<\/p>\n\n\n\n<p>J\u00e1, o artigo \u201c<a href=\"https:\/\/concretoeconstrucoes.org.br\/index.php\/revista\/edicao-111-artigo-002\" target=\"_blank\" rel=\"noreferrer noopener\">Um olhar cr\u00edtico sobre o procedimento simplificado das for\u00e7as horizontais da NBR 15421<\/a>\u201d analisa e compara o procedimento simplificado das a\u00e7\u00f5es horizontais s\u00edsmicas, empregado em regi\u00f5es de pequena acelera\u00e7\u00e3o de projeto (Zona 1 da norma) e m\u00e9todo das for\u00e7as horizontais equivalentes, empregado a partir da Zona 2 da norma.<\/p>\n\n\n\n<p>Conhe\u00e7a os termos, crit\u00e9rios e procedimentos da ABNT NBR 15421 acessando gratuitamente os artigos no site da Revista.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A norma ABNT NBR 15421 cont\u00e9m dispositivos para garantir a seguran\u00e7a das estruturas de concreto em face aos sismos. Ela foi recentemente revisada. Conhe\u00e7a o que mudou.<\/p>\n","protected":false},"author":2,"featured_media":728,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4],"tags":[157,156,155,158],"class_list":["post-727","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-press-releases","tag-estruturas-sismo-resistentes","tag-projeto-de-estruturas-de-concreto","tag-resistencia-a-sismos","tag-seguranca-das-estruturas"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Altera\u00e7\u00f5es na ABNT NBR 15421 Projeto de estruturas resistentes a sismos - Blog CONCRETO &amp; Constru\u00e7\u00f5es<\/title>\n<meta name=\"description\" content=\"Conhe\u00e7a as principais mudan\u00e7as da norma NBR15421 Projeto de estrutura resistentes a sismos publicada em 2023\" \/>\n<meta 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