{"id":2725,"date":"2020-11-09T16:14:14","date_gmt":"2020-11-09T16:14:14","guid":{"rendered":"https:\/\/blog.geostru.eu\/doppia-risonanza-terreno-struttura\/"},"modified":"2020-11-13T14:58:03","modified_gmt":"2020-11-13T14:58:03","slug":"dubla-rezonanta-teren-structura","status":"publish","type":"post","link":"https:\/\/blog.geostru.eu\/ro\/dubla-rezonanta-teren-structura\/","title":{"rendered":"Dubla rezonan\u021b\u0103 teren\/structur\u0103"},"content":{"rendered":"<div class=\"wpb-content-wrapper\"><p>[vc_row][vc_column][vc_column_text]<\/p>\n<p style=\"text-align: justify\">\u00cen cazul unui cutremur, exist\u0103 riscul amplific\u0103rii efectelor sale asupra unei cl\u0103diri, acest risc este cunoscut sub numele de \u201e<strong>dubl\u0103 rezonan\u021b\u0103<\/strong>\u201d \u0219i apare atunci c\u00e2nd valoarea frecven\u021bei de rezonan\u021b\u0103 fundamental\u0103 a terenului de fundare este similar\u0103 cu cea a cl\u0103dirii.<\/p>\n<h3>Efectele dublei rezonan\u021be<\/h3>\n<p style=\"text-align: justify\">Efectele de rezonan\u021b\u0103 dubl\u0103 la teren \/ structur\u0103 sunt responsabile pentru cele mai multe daune \u00een cazul unui cutremur. Fiecare structur\u0103 are propria frecven\u021b\u0103 Fb de rezonan\u021b\u0103, este necesar s\u0103 se investigheze dac\u0103 \u00een subsol exist\u0103 amplific\u0103ri pentru rezonan\u021ba stratigrafic\u0103 \u00een jurul acelei frecven\u021be.<br \/>\nPentru calcularea frecven\u021bei de rezonan\u021b\u0103 a cl\u0103dirii, se aplic\u0103 formul\u0103ri consolidate din literatura tehnic\u0103 \u0219i raportate cu privire la legisla\u021bia european\u0103. Frecven\u021ba cu care apare rezonan\u021ba \u00een sol este descris\u0103 de legea:<\/p>\n<p style=\"text-align: center\"><strong>f=Vs\/4H<\/strong><\/p>\n<p>Unde:<\/p>\n<ul>\n<li>H = \u00cen\u0103l\u021bimea de la parter\/planul de baz\u0103 (sau \u00een\u0103l\u021bimea cl\u0103dirii);<\/li>\n<li style=\"text-align: justify\">V<sub>s\u00a0<\/sub>= Viteza undelor de forfecare.<\/li>\n<\/ul>\n<blockquote>\n<p style=\"text-align: justify\"><em><a href=\"https:\/\/www.geostru.eu\/ro\/shop\/software-ro\/geofizica\/easy-hvsr-software-hvsr-processing\/\"><strong><span style=\"color: #3b8ced\"><span style=\"text-decoration: underline\"><span style=\"color: #3b8ced;text-decoration: underline\">EASY HVSR<\/span><\/span><\/span><\/strong><\/a><span style=\"text-decoration: underline\">:<\/span> Permite ob\u021binerea de rezultate imediate \u00een estimarea: frecven\u021bei de rezonan\u021b\u0103, profilulului stratigrafic \u0219i vitezei undelor de forfecare echivalente Vs. Totul \u00een conformitate cu directivele sugerate de proiectul SESAME<\/em><\/p>\n<\/blockquote>\n<h3>Estimarea perioadei de vibra\u021bie T1 conform EC 8<\/h3>\n<p style=\"text-align: justify\">Estimarea perioadei principalului mod de vibra\u021bie \u00een direc\u021bia luat\u0103 \u00een considerare (T<sub>1<\/sub>) se face conform metodelor raportate \u00een anexa C al <a href=\"https:\/\/eurocodes.jrc.ec.europa.eu\/doc\/WS_335\/report\/EC8_Seismic_Design_of_Buildings-Worked_examples.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">EC8 partea 1-2<\/a>, pentru cl\u0103dirile cu o \u00een\u0103l\u021bime de p\u00e2n\u0103 la 80 m, valoarea perioadei T1 poate fi aproximat\u0103 prin urm\u0103toarea formul\u0103:<\/p>\n<p style=\"text-align: center\">T<sub>1<\/sub> = C<sub>t<\/sub>(H)<sup>3\/4<\/sup>\u00a0 [C1]<\/p>\n<p>dove:<\/p>\n<ul>\n<li>T<sub>1<\/sub> = perioada de baz\u0103 a cl\u0103dirii, exprimat\u0103 \u00een secunde;<\/li>\n<li>C<sub>t<\/sub> =coeficient care variaz\u0103 \u00een func\u021bie de tipul de cl\u0103dire:\n<ul>\n<li>0.085 pentru rame spa\u021biale din o\u021bel cu noduri rigide;<\/li>\n<li>0.075 pentru cadrele spa\u021biale din beton armat cu noduri rigide \u0219i contrav\u00e2ntuiri excentrice;<\/li>\n<li>0.050 pentru toate celelalte structuri;<\/li>\n<\/ul>\n<\/li>\n<li>H = \u00een\u0103l\u021bimea cl\u0103dirii.<\/li>\n<\/ul>\n<h3>Verificarea dublei rezonan\u021be a cl\u0103dirii\/solului<\/h3>\n<p style=\"text-align: justify\">Dac\u0103 diferen\u021ba procentual\u0103 \u00een frecven\u021ba de rezonan\u021b\u0103 a cl\u0103dirii \/ terenului este \u2264 50%, vor exista efecte de amplificare seismic\u0103 datorate rezonan\u021bei duble. \u00cen cazul \u00een care diferen\u021ba procentual\u0103 a frecven\u021bei de rezonan\u021b\u0103 a cl\u0103dirii\/solului este &gt; 50%, efectele amplific\u0103rii seismice locale pot fi rezonabil excluse pentru dubla rezonan\u021b\u0103.<\/p>\n<p>[\/vc_column_text][vc_row_inner][vc_column_inner][vc_column_text]<\/p>\n<blockquote><p><a href=\"https:\/\/geoapp.geostru.eu\/app\/dual-echo\" target=\"_blank\" rel=\"https:\/\/geoapp.geostru.eu\/app\/dual-echo noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-2708 alignleft\" title=\"doppia risonanza\" src=\"https:\/\/blog.geostru.eu\/wp-content\/uploads\/sites\/9\/2020\/11\/Schermata-2020-11-09-alle-11.12.06-1-300x274.png\" alt=\"doppia risonanza\" width=\"124\" height=\"113\" srcset=\"https:\/\/blog.geostru.eu\/wp-content\/uploads\/sites\/9\/2020\/11\/Schermata-2020-11-09-alle-11.12.06-1-300x274.png 300w, https:\/\/blog.geostru.eu\/wp-content\/uploads\/sites\/9\/2020\/11\/Schermata-2020-11-09-alle-11.12.06-1-1024x936.png 1024w, https:\/\/blog.geostru.eu\/wp-content\/uploads\/sites\/9\/2020\/11\/Schermata-2020-11-09-alle-11.12.06-1-768x702.png 768w, https:\/\/blog.geostru.eu\/wp-content\/uploads\/sites\/9\/2020\/11\/Schermata-2020-11-09-alle-11.12.06-1.png 1244w\" sizes=\"(max-width: 124px) 100vw, 124px\" \/><\/a><\/p>\n<p style=\"text-align: justify\">Aplica\u021bia <span style=\"text-decoration: underline\"><span style=\"color: #3b8ced\"><a style=\"color: #3b8ced;text-decoration: underline\" href=\"\/\/geoapp.geostru.eu\/app\/dual-echo\/?lang=ro\" target=\"_blank\" rel=\"noopener noreferrer\">DUAL ECHO<\/a><\/span><\/span> este GRATUIT\u0102, permite estimarea fenomenului dublei rezonan\u021be cl\u0103dirie \/ teren, responsabil pentru majoritatea pagubelor \u00een cazul unui cutremur. Geoapp genereaz\u0103 raportul de calcul \u00een format * .docx, grafic \u0219i permite salvarea fi\u0219ierului de lucru \u0219i deschiderea ulterioar\u0103.<\/p>\n<p>&nbsp;<\/p><\/blockquote>\n<p>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_column_text] \u00cen cazul unui cutremur, exist\u0103 riscul amplific\u0103rii efectelor sale asupra unei cl\u0103diri, acest risc este cunoscut sub numele de \u201edubl\u0103 rezonan\u021b\u0103\u201d \u0219i apare atunci c\u00e2nd valoarea frecven\u021bei de rezonan\u021b\u0103 fundamental\u0103 a terenului de fundare este similar\u0103 cu cea a cl\u0103dirii. Efectele dublei rezonan\u021be Efectele de rezonan\u021b\u0103 dubl\u0103 la teren \/ structur\u0103 sunt responsabile pentru&hellip;<\/p>\n","protected":false},"author":16658,"featured_media":2719,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1596,1443,821],"tags":[1640,1641,1642],"class_list":["post-2725","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ingegneria-2-ro","category-articoli-geotecnica-ro","category-ingegneria-ro","tag-doppia-risonanza-ro","tag-dual-echo-ro","tag-pushover-ro","category-1596","category-1443","category-821","description-off"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v25.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Dubla rezonan\u021b\u0103 teren\/structur\u0103 - Geostru Blog<\/title>\n<meta name=\"description\" content=\"In cazul unui cutremur, exist\u0103 riscul amplific\u0103rii efectelor sale asupra unei cl\u0103diri, acest risc este cunoscut sub numele de \u201edubl\u0103 rezonan\u021b\u0103\u201d\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.geostru.eu\/ro\/dubla-rezonanta-teren-structura\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dubla rezonan\u021b\u0103 teren\/structur\u0103\" \/>\n<meta property=\"og:description\" content=\"\u00cen cazul unui cutremur, exist\u0103 riscul amplific\u0103rii efectelor sale asupra unei cl\u0103diri, acest risc este cunoscut sub numele de \u201edubl\u0103 rezonan\u021b\u0103\u201d \u0219i apare\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.geostru.eu\/ro\/dubla-rezonanta-teren-structura\/\" \/>\n<meta property=\"og:site_name\" content=\"Geostru Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/GeoStruSoftware\/\" \/>\n<meta property=\"article:published_time\" content=\"2020-11-09T16:14:14+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-11-13T14:58:03+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.geostru.eu\/wp-content\/uploads\/sites\/9\/2020\/11\/Risorsa-28.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1199\" \/>\n\t<meta property=\"og:image:height\" content=\"630\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Geostru editor\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Scris de\" \/>\n\t<meta name=\"twitter:data1\" content=\"Geostru editor\" \/>\n\t<meta name=\"twitter:label2\" content=\"Timp estimat pentru citire\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/blog.geostru.eu\/ro\/dubla-rezonanta-teren-structura\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/blog.geostru.eu\/ro\/dubla-rezonanta-teren-structura\/\"},\"author\":{\"name\":\"Geostru editor\",\"@id\":\"https:\/\/blog.geostru.eu\/ro\/#\/schema\/person\/e065ac1a7b26936e8df7096ec39b166f\"},\"headline\":\"Dubla rezonan\u021b\u0103 teren\/structur\u0103\",\"datePublished\":\"2020-11-09T16:14:14+00:00\",\"dateModified\":\"2020-11-13T14:58:03+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/blog.geostru.eu\/ro\/dubla-rezonanta-teren-structura\/\"},\"wordCount\":449,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/blog.geostru.eu\/ro\/#organization\"},\"image\":{\"@id\":\"https:\/\/blog.geostru.eu\/ro\/dubla-rezonanta-teren-structura\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blog.geostru.eu\/wp-content\/uploads\/sites\/9\/2020\/11\/WhatsApp-Image-2020-11-04-at-16.38.27.png\",\"keywords\":[\"doppia risonanza\",\"dual echo\",\"pushover\"],\"articleSection\":[\"Inginerie\",\"Inginerie Geotehnic\u0103\",\"Inginerie structural\u0103\"],\"inLanguage\":\"ro-RO\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/blog.geostru.eu\/ro\/dubla-rezonanta-teren-structura\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.geostru.eu\/ro\/dubla-rezonanta-teren-structura\/\",\"url\":\"https:\/\/blog.geostru.eu\/ro\/dubla-rezonanta-teren-structura\/\",\"name\":\"Dubla rezonan\u021b\u0103 teren\/structur\u0103 - 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