{"id":15360,"date":"2026-09-20T07:33:15","date_gmt":"2026-09-20T07:33:15","guid":{"rendered":"https:\/\/blog.geostru.eu\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/"},"modified":"2026-09-20T07:33:17","modified_gmt":"2026-09-20T07:33:17","slug":"fondazioni-ca-rc-sec-ntc-2018-prima-plastificare","status":"publish","type":"post","link":"https:\/\/blog.geostru.eu\/ro\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/","title":{"rendered":"Funda\u021bii din beton armat \u0219i NTC 2018: prim\u0103 plastificare, ductilitate \u0219i interac\u021biune pilot-teren cu Fondazioni CA \u0219i RC-SEC"},"content":{"rendered":"<p>Funda\u021biile sunt partea structurii \u00een care norma italian\u0103 <strong>NTC 2018<\/strong> a schimbat cel mai mult modul de calcul: trebuie s\u0103 r\u0103m\u00e2n\u0103 \u00een domeniu esen\u021bial elastic sub seism, sec\u021biunile lor se verific\u0103 la <strong>starea limit\u0103 de prim\u0103 plastificare<\/strong> \u0219i nu la SLU clasic, tas\u0103rile grupurilor de pilo\u021bi trebuie evaluate cu interac\u021biunea dintre pilo\u021bi, iar interac\u021biunea pilot-teren \u2014 puternic neliniar\u0103 \u2014 nu mai poate fi expediat\u0103 cu un resort constant. Acest articol explic\u0103 modul \u00een care dou\u0103 programe GeoStru cu sute de licen\u021be active \u00een Italia, <a href=\"https:\/\/www.geostru.eu\/ro\/shop\/software-ro\/geotehnica-si-geologie\/fondazioni-ca\/\">Fondazioni CA<\/a> \u0219i <a href=\"https:\/\/www.geostru.eu\/ro\/shop\/software-ro\/calcolo-di-sezioni-in-cemento-armato\/\">RC-SEC<\/a>, abordeaz\u0103 exact aceste puncte: modelarea funda\u021biei (grinzi, re\u021bele de grinzi, radiere, funda\u021bii izolate, pilo\u021bi \u0219i micropilo\u021bi) \u0219i verificarea sec\u021biunilor din beton armat, cu referin\u021bele normative pe care verificatorul le va c\u0103uta \u00een nota de calcul.<\/p>\r\n\r\n<h2>Ce cere NTC 2018 funda\u021biilor din beton armat<\/h2>\r\n\r\n<ul>\r\n<li><strong>Comportament nedisipativ.<\/strong> Structurile de funda\u021bie trebuie proiectate s\u0103 r\u0103m\u00e2n\u0103 \u00een domeniu elastic: eforturile seismice provin din ierarhia rezisten\u021belor sau din analiza cu factor de comportare limitat, iar sec\u021biunile nu pot conta pe ductilitate.<\/li>\r\n<li><strong>Starea limit\u0103 de prim\u0103 plastificare.<\/strong> Pentru toate combina\u021biile seismice ale structurilor de funda\u021bie (\u0219i pentru suprastructurile calculate \u00een regim nedisipativ, \u00a77.2.2) verificarea de rezisten\u021b\u0103 nu este la SLU: momentul capabil este cel din domeniul esen\u021bial elastic, corespunz\u0103tor <strong>celei mai mici dintre curbura la curgerea o\u021belului \u0219i curbura la deforma\u021bia de v\u00e2rf a betonului (0,002)<\/strong>. Este noutatea NTC 2018 care lipse\u0219te cel mai des din programele generice de verificare a sec\u021biunilor.<\/li>\r\n<li><strong>Ductilitate (\u00a77.4).<\/strong> Verific\u0103ri indirecte (detalii constructive: procente de armare, confinarea etrierilor) \u0219i directe (factorul de ductilitate \u00een curbur\u0103 \u03bc<sub>\u03a6<\/sub> din diagrama moment-curbur\u0103), pentru elementele care trebuie s\u0103 fie ductile.<\/li>\r\n<li><strong>Tas\u0103rile grupurilor de pilo\u021bi la SLS.<\/strong> Pentru estimarea tas\u0103rilor axiale \u00een combina\u021biile de exploatare NTC 2018 impune evaluarea <strong>interac\u021biunii dintre pilo\u021bi<\/strong>: un pilot \u00een grup se taseaz\u0103 mai mult dec\u00e2t acela\u0219i pilot izolat.<\/li>\r\n<li><strong>Efecte cinematice.<\/strong> \u00cen terenuri stratificate cu contrast puternic de rigiditate, pilotul este solicitat de trecerea undelor seismice chiar f\u0103r\u0103 \u00eenc\u0103rc\u0103ri din suprastructur\u0103: momentul cinematic trebuie adunat cu cel iner\u021bial.<\/li>\r\n<\/ul>\r\n\r\n<h2>Fondazioni CA: modelul funda\u021biei<\/h2>\r\n\r\n<p><a href=\"https:\/\/www.geostru.eu\/ro\/shop\/software-ro\/geotehnica-si-geologie\/fondazioni-ca\/\">Fondazioni CA<\/a> rezolv\u0103 funda\u021bia ca un <strong>cadru tridimensional cu un nivel \u0219i noduri deplasabile<\/strong>: st\u00e2lpii sunt pilo\u021bii (\u0219i \u00eenclina\u021bi), plan\u0219eul este format din grinzi \u0219i c\u00e2mpuri de plac\u0103, terenul este un pat de resorturi. Totul este discretizat automat \u00een elemente finite pornind de la o dimensiune medie a re\u021belei, cu tronsoane rigide (offset) pentru excentricit\u0103\u021bi \u0219i pentru por\u021biunile din interiorul st\u00e2lpilor. Tipologiile prev\u0103zute:<\/p>\r\n\r\n<ul>\r\n<li><strong>Grinzi continue<\/strong>, \u00een eleva\u021bie sau pe teren elastic Winkler, cu sec\u021biuni dreptunghiulare, T, dublu T (\u0219i cu t\u0103lpi inegale), L, circulare sau generice; reazeme \u0219i pe pilo\u021bi cu continuitate de transla\u021bie \u0219i rotire; \u00eenc\u0103rc\u0103ri distribuite constante \u0219i variabile, leg\u0103turi \u0219i \u00eenc\u0103rc\u0103ri nodale; combina\u021bii SLU \u0219i SLS definite de utilizator cu factorii de combinare.<\/li>\r\n<li><strong>Re\u021bele de grinzi<\/strong>, <strong>radiere<\/strong> \u0219i <strong>funda\u021bii izolate dreptunghiulare<\/strong>, \u0219i pe pilo\u021bi, cu plan\u0219eu rigid \u00een planul s\u0103u (radiere pe pilo\u021bi) sau deformabil (funda\u021bii izolate distan\u021bate cu grinzi de leg\u0103tur\u0103 pu\u021bin rigide \u00een plan).<\/li>\r\n<li><strong>Pilo\u021bi \u0219i micropilo\u021bi<\/strong> din beton armat sau \u021beav\u0103 de o\u021bel, izola\u021bi sau \u00een grup, lega\u021bi cu continuitate sau articula\u021bie sferic\u0103 de re\u021bele, pl\u0103ci \u0219i funda\u021bii izolate; ax\u0103 \u00eenclinabil\u0103; tronson rigid automat pentru grosimea radierului de leg\u0103tur\u0103.<\/li>\r\n<\/ul>\r\n\r\n<h3>Interac\u021biunea pilot-teren: resorturi neliniare, nu un coeficient<\/h3>\r\n<p>Pilotul este \u00eemp\u0103r\u021bit \u00een bare cu sec\u021biune circular\u0103, iar terenul ac\u021bioneaz\u0103 \u00een noduri prin <strong>resorturi Winkler liniare sau neliniare<\/strong>, transversale \u0219i axiale. Modelul neliniar folose\u0219te <strong>curbe p-y hiperbolice (Carter)<\/strong> pentru deforma\u021biile transversale, <strong>curbe t-z<\/strong> de-a lungul fusului \u0219i <strong>curbe q-b<\/strong> la v\u00e2rf pentru cele axiale: surprinde at\u00e2t neliniaritatea interac\u021biunii, c\u00e2t \u0219i variabilitatea caracteristicilor cu ad\u00e2ncimea \u00een terenurile stratificate. Pentru tas\u0103rile la SLS programul calculeaz\u0103 <strong>interac\u021biunea dintre pilo\u021bii din grup<\/strong> cu factorii de interac\u021biune Lancellotta (teren liniar sau neliniar); pentru \u00eenc\u0103rc\u0103rile transversale interac\u021biunea de grup se calculeaz\u0103 cu curbele p-y. Dac\u0103 exist\u0103 \u00eencerc\u0103ri de \u00eenc\u0103rcare pe pilo\u021bi de prob\u0103, modelul hiperbolic <strong>Chin<\/strong> rafineaz\u0103 estimarea tas\u0103rilor. La <strong>funda\u021biile mixte radier-pilo\u021bi<\/strong> interac\u021biunea este tratat\u0103 cu metoda PDR, care reduce coeficientul Winkler al radierului la o valoare efectiv\u0103. <strong>Momentul cinematic<\/strong> \u00een teren cu dou\u0103 straturi se calculeaz\u0103 cu metoda aproximativ\u0103 Gazetas (1997) \u0219i se adun\u0103 cu cel al pilotului at\u00e2t la interfa\u021ba dintre straturi, c\u00e2t \u0219i la leg\u0103tura cu radierul. Arm\u0103turile longitudinale \u0219i transversale ale pilo\u021bilor din beton armat sunt proiectate \u0219i desenate.<\/p>\r\n\r\n<p>Rezultatul este o funda\u021bie calculat\u0103 ca sistem: \u00eenc\u0103rc\u0103rile orizontale din suprastructur\u0103 se distribuie \u00eentre pilo\u021bi \u00een func\u021bie de rigidit\u0103\u021bile pilo\u021bilor \u0219i ale grinzilor sau c\u00e2mpurilor care \u00eei leag\u0103, nu prin criterii de repartizare a priori.<\/p>\r\n\r\n<h2>RC-SEC: sec\u021biunile, inclusiv prima plastificare<\/h2>\r\n\r\n<p><a href=\"https:\/\/www.geostru.eu\/ro\/shop\/software-ro\/calcolo-di-sezioni-in-cemento-armato\/\">RC-SEC<\/a> este printre cele mai v\u00e2ndute programe GeoStru \u00een Italia \u0219i verific\u0103 <strong>sec\u021biuni din beton armat de orice form\u0103<\/strong>: dreptunghiulare, T, dublu T, L, circulare cu introducere rapid\u0103, sau poligonale generice cu unul sau mai multe domenii de beton pline sau goale, sec\u021biuni mixte, pile de pod, \u0219i importate din DXF cu bare \u0219i domenii. Pentru fiecare sec\u021biune, p\u00e2n\u0103 la 60 de combina\u021bii per tip \u00eentr-un singur ciclu (SLU, rare, frecvente, cvasipermanente).<\/p>\r\n\r\n<ul>\r\n<li><strong>St\u0103ri limit\u0103 ultime<\/strong>: \u00eencovoiere cu for\u021b\u0103 axial\u0103 dreapt\u0103 \u0219i oblic\u0103 (verificare \u0219i proiectare a arm\u0103turilor, \u0219i automat\u0103 pentru st\u00e2lpi dreptunghiulari, circulari \u0219i generici); domenii de interac\u021biune N-M<sub>x<\/sub>-M<sub>y<\/sub> bi- \u0219i tridimensionale calculate \u0219i desenate; for\u021b\u0103 t\u0103ietoare \u0219i torsiune cu proiectarea etrierilor; flambajul st\u00e2lpilor cu metoda st\u00e2lpului model; pozi\u021bia axei neutre, tensiuni \u0219i deforma\u021bii ale v\u00e2rfurilor \u0219i barelor la starea ultim\u0103.<\/li>\r\n<li><strong>Starea limit\u0103 de prim\u0103 plastificare<\/strong> (NTC 2018): pentru combina\u021biile seismice ale funda\u021biilor \u0219i ale structurilor nedisipative, momentul capabil este calculat \u00een domeniu elastic conform \u00a77.2.2 \u2014 verificarea iese deja \u00een forma pe care o a\u0219teapt\u0103 verificatorul.<\/li>\r\n<li><strong>Ductilitate<\/strong>: verific\u0103ri indirecte pe detaliile constructive (procente de arm\u0103tur\u0103 \u00eentins\u0103 \u0219i comprimat\u0103 \u00een grinzi, expresii simplificate cu confinare pentru st\u00e2lpi \u0219i pere\u021bi) \u0219i <strong>verificarea direct\u0103 a factorului de ductilitate \u00een curbur\u0103<\/strong> cu diagrama moment-curbur\u0103, care \u021bine cont de confinarea etrierilor asupra nucleului \u0219i de stratul de acoperire neconfinat. Dou\u0103 legi constitutive pentru nucleul confinat: parabol\u0103-dreptunghi pe valori de proiectare (\u00a74.1.2.1.2.1) pentru compara\u021bia cu cerin\u021ba de ductilitate, \u0219i <strong>Mander<\/strong> pe valori medii pentru curburile ultime \u0219i de prim\u0103 plastificare folosite \u00een analizele neliniare (pushover).<\/li>\r\n<li><strong>St\u0103ri limit\u0103 de serviciu<\/strong>: tensiuni normale la \u00eencovoiere cu for\u021b\u0103 axial\u0103 dreapt\u0103 \u0219i oblic\u0103 (metoda simplificat\u0103 sau AAEM), deschiderea fisurilor conform Eurocodului \u0219i DM &#8217;96 italian, s\u0103ge\u021bi ale grinzilor cu fisurare, curgere lent\u0103 \u0219i contrac\u021bie.<\/li>\r\n<\/ul>\r\n\r\n<p>Pentru <strong>cl\u0103dirile existente<\/strong> exist\u0103 <a href=\"https:\/\/www.geostru.eu\/en\/shop\/software-en\/sezioni-rinforzate-in-c-a-rc-sec-frp\/\">RC-SEC-FRP<\/a>: sec\u021biuni consolidate cu FRP (\u00eencovoiere, for\u021b\u0103 t\u0103ietoare, confinare), platbande de o\u021bel, pl\u0103ci conlucrante cu calculul lunec\u0103rii preluate de conectori, c\u0103m\u0103\u0219uiri din beton armat, cercuiri cu corniere \u0219i platbande; verific\u0103ri \u00a78.4.1 \u0219i ductilitate \u00eenainte \u0219i dup\u0103 consolidare, cu rotiri de coard\u0103 \u03b8<sub>y<\/sub> \u0219i \u03b8<sub>u<\/sub> pentru pushover (\u00a7C8.7.2.3), \u0219i pentru sec\u021biuni precomprimate.<\/p>\r\n\r\n<h2>Fluxul de lucru pe funda\u021bie<\/h2>\r\n<ol>\r\n<li>Se modeleaz\u0103 funda\u021bia \u00een <strong>Fondazioni CA<\/strong> (geometrie, pilo\u021bi, teren stratificat cu resorturi neliniare, \u00eenc\u0103rc\u0103ri \u0219i combina\u021bii din suprastructur\u0103).<\/li>\r\n<li>Se citesc eforturile, tas\u0103rile (cu interac\u021biune de grup la SLS) \u0219i distribu\u021bia \u00eenc\u0103rc\u0103rilor orizontale \u00eentre pilo\u021bi; pentru pilo\u021bi programul proiecteaz\u0103 \u0219i deseneaz\u0103 arm\u0103turile.<\/li>\r\n<li>Sec\u021biunile grinzilor, radierelor \u0219i funda\u021biilor izolate se verific\u0103 \u00een <strong>RC-SEC<\/strong> la starea limit\u0103 de prim\u0103 plastificare pentru combina\u021biile seismice \u0219i la SLU \u0219i SLS pentru celelalte, cu domeniile de interac\u021biune \u00een nota de calcul.<\/li>\r\n<li><strong>Nota de calcul<\/strong> iese cu ipoteze, metode, referin\u021be normative (\u00a77.2.2, \u00a77.4, \u00a74.1.2.1.2.1) \u0219i grafice: gata de depunere.<\/li>\r\n<\/ol>\r\n\r\n<h2>De ce nu este suficient\u0103 dimensionarea \u201eintern\u0103\u201d din programele geotehnice<\/h2>\r\n<p>Multe programe geotehnice \u2014 <a href=\"https:\/\/blog.geostru.eu\/ro\/geostru-vs-geo5\/\">inclusiv GEO5<\/a> \u2014 dimensioneaz\u0103 betonul armat \u00een interiorul calculului zidului, peretelui de sprijin sau pilotului. Func\u021bioneaz\u0103 pentru verificarea curent\u0103, dar NTC 2018 cere funda\u021biilor ceva \u00een plus: momentul de prim\u0103 plastificare \u00een locul momentului ultim \u00een combina\u021biile seismice, ductilitatea \u00een curbur\u0103 acolo unde este necesar\u0103, interac\u021biunea de grup la tas\u0103ri, momentul cinematic \u00een terenurile stratificate. Sunt verific\u0103ri care trebuie f\u0103cute explicit \u0219i documentate; Fondazioni CA \u0219i RC-SEC le fac \u00een forma prev\u0103zut\u0103 de norma italian\u0103.<\/p>\r\n\r\n<h2>Licen\u021be \u0219i prob\u0103<\/h2>\r\n<p>Ambele sunt programe desktop cu <strong>licen\u021b\u0103 perpetu\u0103<\/strong>: Fondazioni CA 490 \u20ac + TVA, RC-SEC 390 \u20ac + TVA (RC-SEC-FRP 390 \u20ac), actualiz\u0103ri \u0219i asisten\u021b\u0103 incluse \u00een primul an \u0219i re\u00eennoire anual\u0103 op\u021bional\u0103 egal\u0103 cu 10 % din pre\u021bul de list\u0103. Manuale online: <a href=\"https:\/\/help.geostru.eu\/fondazionica\/it\/\">Fondazioni CA<\/a> \u0219i <a href=\"https:\/\/help.geostru.eu\/rcsec\/it\/\">RC-SEC<\/a>. <a href=\"https:\/\/www.geostru.eu\/en\/trial\/\">Prob\u0103 gratuit\u0103<\/a> la cerere.<\/p>\r\n\r\n<h2>\u00centreb\u0103ri frecvente<\/h2>\r\n\r\n\r\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-prima-plastificare\"><strong class=\"schema-faq-question\">Ce este starea limit\u0103 de prim\u0103 plastificare \u00een NTC 2018?<\/strong> <p class=\"schema-faq-answer\">Este verificarea de rezisten\u021b\u0103 prev\u0103zut\u0103 de NTC 2018 pentru combina\u021biile seismice ale structurilor de funda\u021bie \u0219i ale suprastructurilor calculate \u00een regim nedisipativ (\u00a77.2.2): momentul capabil nu este cel ultim, ci cel din domeniul esen\u021bial elastic, corespunz\u0103tor celei mai mici dintre curbura la curgerea o\u021belului \u0219i curbura la deforma\u021bia de v\u00e2rf a betonului (0,002). RC-SEC o execut\u0103 direct.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-interactiune-pilot-teren\"><strong class=\"schema-faq-question\">Cum modeleaz\u0103 Fondazioni CA interac\u021biunea pilot-teren?<\/strong> <p class=\"schema-faq-answer\">Cu resorturi Winkler liniare sau neliniare aplicate \u00een nodurile pilotului discretizat: curbe p-y hiperbolice (Carter) pentru deforma\u021biile transversale, curbe t-z de-a lungul fusului \u0219i q-b la v\u00e2rf pentru cele axiale. Interac\u021biunea dintre pilo\u021bii din grup pentru tas\u0103rile la SLS se calculeaz\u0103 cu factorii Lancellotta, cea pentru \u00eenc\u0103rc\u0103rile transversale cu curbele p-y; modelul Chin folose\u0219te \u00eencerc\u0103rile de \u00eenc\u0103rcare pe pilo\u021bi de prob\u0103; funda\u021biile mixte radier-pilo\u021bi sunt tratate cu metoda PDR; momentul cinematic \u00een teren cu dou\u0103 straturi cu Gazetas (1997).<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-rcsec-sectiuni\"><strong class=\"schema-faq-question\">Ce sec\u021biuni verific\u0103 RC-SEC?<\/strong> <p class=\"schema-faq-answer\">Sec\u021biuni din beton armat de orice form\u0103: dreptunghiulare, T, dublu T, L \u0219i circulare cu introducere rapid\u0103, poligonale generice cu unul sau mai multe domenii pline sau goale, sec\u021biuni mixte \u0219i pile de pod, \u0219i importate din DXF. Verific\u0103ri SLU la \u00eencovoiere cu for\u021b\u0103 axial\u0103 dreapt\u0103 \u0219i oblic\u0103 cu domenii N-Mx-My, for\u021b\u0103 t\u0103ietoare \u0219i torsiune, flambaj, prim\u0103 plastificare, ductilitate \u00een curbur\u0103 cu moment-curbur\u0103 (\u0219i Mander), SLS cu tensiuni, fisurare \u0219i s\u0103ge\u021bi; p\u00e2n\u0103 la 60 de combina\u021bii per tip \u00eentr-un ciclu.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-ductilitate-fundatii\"><strong class=\"schema-faq-question\">Trebuie verificat\u0103 ductilitatea funda\u021biilor?<\/strong> <p class=\"schema-faq-answer\">Funda\u021biile sunt proiectate s\u0103 r\u0103m\u00e2n\u0103 \u00een domeniu elastic (comportament nedisipativ) \u0219i \u00een combina\u021biile seismice se verific\u0103 la starea limit\u0103 de prim\u0103 plastificare; verific\u0103rile de ductilitate din \u00a77.4 \u2014 indirecte pe detaliile constructive \u0219i directe cu factorul de ductilitate \u00een curbur\u0103 \u2014 privesc elementele care trebuie s\u0103 disipeze. RC-SEC execut\u0103 ambele familii de verific\u0103ri \u0219i construie\u0219te diagrama moment-curbur\u0103 cu confinarea etrierilor.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-cost-fondazioni-ca\"><strong class=\"schema-faq-question\">C\u00e2t cost\u0103 Fondazioni CA \u0219i RC-SEC?<\/strong> <p class=\"schema-faq-answer\">Fondazioni CA cost\u0103 490 \u20ac + TVA \u0219i RC-SEC 390 \u20ac + TVA (RC-SEC-FRP 390 \u20ac), cu licen\u021b\u0103 perpetu\u0103: actualiz\u0103ri \u0219i asisten\u021b\u0103 incluse \u00een primul an, apoi re\u00eennoire anual\u0103 op\u021bional\u0103 egal\u0103 cu 10 % din pre\u021bul de list\u0103. Este disponibil\u0103 o prob\u0103 gratuit\u0103 la cerere.<\/p> <\/div> <\/div>\r\n\r\n\r\n<h2>Pentru aprofundare<\/h2>\r\n<ul>\r\n<li><a href=\"https:\/\/www.geostru.eu\/ro\/shop\/software-ro\/geotehnica-si-geologie\/fondazioni-ca\/\">Fondazioni CA<\/a> \u00b7 <a href=\"https:\/\/www.geostru.eu\/ro\/shop\/software-ro\/calcolo-di-sezioni-in-cemento-armato\/\">RC-SEC<\/a> \u00b7 <a href=\"https:\/\/www.geostru.eu\/en\/shop\/software-en\/sezioni-rinforzate-in-c-a-rc-sec-frp\/\">RC-SEC-FRP<\/a> \u00b7 <a href=\"https:\/\/www.geostru.eu\/ro\/shop\/software-ro\/geotehnica-si-geologie\/piloti-si-micropiloti\/\">MP \u2013 pilo\u021bi \u0219i micropilo\u021bi<\/a> \u00b7 <a href=\"https:\/\/www.geostru.eu\/ro\/shop\/software-ro\/software-geologia-ro-2\/deepfound-tasari-radier-general-pe-piloti\/\">DeepFound \u2013 radiere pe pilo\u021bi<\/a><\/li>\r\n<li><a href=\"https:\/\/blog.geostru.eu\/ro\/geostru-vs-geo5\/\">GeoStru sau GEO5? Compara\u021bie \u00eentre cele dou\u0103 suite geotehnice<\/a> \u00b7 <a href=\"https:\/\/blog.geostru.eu\/ro\/cele-mai-bune-programe-software-pentru-geologi\/\">Cele mai bune programe pentru geologi \u00een 2026<\/a><\/li>\r\n<li><a href=\"https:\/\/www.geostru.eu\/en\/trial\/\">Solicita\u021bi o versiune de prob\u0103 gratuit\u0103<\/a><\/li>\r\n<\/ul>\r\n\r\n<p><em>Articol actualizat \u00een septembrie 2026. Sugestii: <a href=\"mailto:info@geostru.eu\">info@geostru.eu<\/a>.<\/em><\/p>\r\n","protected":false},"excerpt":{"rendered":"<p>Funda\u021biile sunt partea structurii \u00een care norma italian\u0103 NTC 2018 a schimbat cel mai mult modul de calcul: trebuie s\u0103 r\u0103m\u00e2n\u0103 \u00een domeniu esen\u021bial elastic sub seism, sec\u021biunile lor se verific\u0103 la starea limit\u0103 de prim\u0103 plastificare \u0219i nu la SLU clasic, tas\u0103rile grupurilor de pilo\u021bi trebuie evaluate cu interac\u021biunea dintre pilo\u021bi, iar interac\u021biunea pilot-teren&hellip;<\/p>\n","protected":false},"author":16658,"featured_media":15353,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1969,821],"tags":[2724,1946,2722,2725,1671,2721,1663,2723],"class_list":["post-15360","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geotehnica-ro","category-ingegneria-ro","tag-ductilitate","tag-fondazioni-ca","tag-fundatii-pe-piloti","tag-interactiune-pilot-teren","tag-ntc-2018","tag-prima-plastificare","tag-rc-sec","tag-sectiuni-din-beton-armat","category-1969","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>Fondazioni CA \u0219i RC-SEC: NTC 2018 \u0219i prima plastificare<\/title>\n<meta name=\"description\" content=\"Cum calculeaz\u0103 Fondazioni CA \u0219i RC-SEC funda\u021biile din beton armat conform NTC 2018: starea limit\u0103 de prim\u0103 plastificare, ductilitate, pilo\u021bi cu resorturi neliniare \u0219i interac\u021biune de grup.\" \/>\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\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Funda\u021bii din beton armat \u0219i NTC 2018: prim\u0103 plastificare, ductilitate \u0219i interac\u021biune pilot-teren cu Fondazioni CA \u0219i RC-SEC\" \/>\n<meta property=\"og:description\" content=\"Funda\u021biile sunt partea structurii \u00een care norma italian\u0103 NTC 2018 a schimbat cel mai mult modul de calcul: trebuie s\u0103 r\u0103m\u00e2n\u0103 \u00een domeniu esen\u021bial elastic\" \/>\n<meta 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Interac\u021biunea dintre pilo\u021bii din grup pentru tas\u0103rile la SLS se calculeaz\u0103 cu factorii Lancellotta, cea pentru \u00eenc\u0103rc\u0103rile transversale cu curbele p-y; modelul Chin folose\u0219te \u00eencerc\u0103rile de \u00eenc\u0103rcare pe pilo\u021bi de prob\u0103; funda\u021biile mixte radier-pilo\u021bi sunt tratate cu metoda PDR; momentul cinematic \u00een teren cu dou\u0103 straturi cu Gazetas (1997).\",\"inLanguage\":\"ro-RO\"},\"inLanguage\":\"ro-RO\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/blog.geostru.eu\/ro\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/#faq-rcsec-sectiuni\",\"position\":3,\"url\":\"https:\/\/blog.geostru.eu\/ro\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/#faq-rcsec-sectiuni\",\"name\":\"Ce sec\u021biuni verific\u0103 RC-SEC?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Sec\u021biuni din beton armat de orice form\u0103: dreptunghiulare, T, dublu T, L \u0219i circulare cu introducere rapid\u0103, poligonale generice cu unul sau mai multe domenii pline sau goale, sec\u021biuni mixte \u0219i pile de pod, \u0219i importate din DXF. 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\u00een regim nedisipativ (\u00a77.2.2): momentul capabil nu este cel ultim, ci cel din domeniul esen\u021bial elastic, corespunz\u0103tor celei mai mici dintre curbura la curgerea o\u021belului \u0219i curbura la deforma\u021bia de v\u00e2rf a betonului (0,002). RC-SEC o execut\u0103 direct.","inLanguage":"ro-RO"},"inLanguage":"ro-RO"},{"@type":"Question","@id":"https:\/\/blog.geostru.eu\/ro\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/#faq-interactiune-pilot-teren","position":2,"url":"https:\/\/blog.geostru.eu\/ro\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/#faq-interactiune-pilot-teren","name":"Cum modeleaz\u0103 Fondazioni CA interac\u021biunea pilot-teren?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Cu resorturi Winkler liniare sau neliniare aplicate \u00een nodurile pilotului discretizat: curbe p-y hiperbolice (Carter) pentru deforma\u021biile transversale, curbe t-z de-a lungul fusului \u0219i q-b la v\u00e2rf pentru cele axiale. Interac\u021biunea dintre pilo\u021bii din grup pentru tas\u0103rile la SLS se calculeaz\u0103 cu factorii Lancellotta, cea pentru \u00eenc\u0103rc\u0103rile transversale cu curbele p-y; modelul Chin folose\u0219te \u00eencerc\u0103rile de \u00eenc\u0103rcare pe pilo\u021bi de prob\u0103; funda\u021biile mixte radier-pilo\u021bi sunt tratate cu metoda PDR; momentul cinematic \u00een teren cu dou\u0103 straturi cu Gazetas (1997).","inLanguage":"ro-RO"},"inLanguage":"ro-RO"},{"@type":"Question","@id":"https:\/\/blog.geostru.eu\/ro\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/#faq-rcsec-sectiuni","position":3,"url":"https:\/\/blog.geostru.eu\/ro\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/#faq-rcsec-sectiuni","name":"Ce sec\u021biuni verific\u0103 RC-SEC?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Sec\u021biuni din beton armat de orice form\u0103: dreptunghiulare, T, dublu T, L \u0219i circulare cu introducere rapid\u0103, poligonale generice cu unul sau mai multe domenii pline sau goale, sec\u021biuni mixte \u0219i pile de pod, \u0219i importate din DXF. Verific\u0103ri SLU la \u00eencovoiere cu for\u021b\u0103 axial\u0103 dreapt\u0103 \u0219i oblic\u0103 cu domenii N-Mx-My, for\u021b\u0103 t\u0103ietoare \u0219i torsiune, flambaj, prim\u0103 plastificare, ductilitate \u00een curbur\u0103 cu moment-curbur\u0103 (\u0219i Mander), SLS cu tensiuni, fisurare \u0219i s\u0103ge\u021bi; p\u00e2n\u0103 la 60 de combina\u021bii per tip \u00eentr-un ciclu.","inLanguage":"ro-RO"},"inLanguage":"ro-RO"},{"@type":"Question","@id":"https:\/\/blog.geostru.eu\/ro\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/#faq-ductilitate-fundatii","position":4,"url":"https:\/\/blog.geostru.eu\/ro\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/#faq-ductilitate-fundatii","name":"Trebuie verificat\u0103 ductilitatea funda\u021biilor?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Funda\u021biile sunt proiectate s\u0103 r\u0103m\u00e2n\u0103 \u00een domeniu elastic (comportament nedisipativ) \u0219i \u00een combina\u021biile seismice se verific\u0103 la starea limit\u0103 de prim\u0103 plastificare; verific\u0103rile de ductilitate din \u00a77.4 \u2014 indirecte pe detaliile constructive \u0219i directe cu factorul de ductilitate \u00een curbur\u0103 \u2014 privesc elementele care trebuie s\u0103 disipeze. RC-SEC execut\u0103 ambele familii de verific\u0103ri \u0219i construie\u0219te diagrama moment-curbur\u0103 cu confinarea etrierilor.","inLanguage":"ro-RO"},"inLanguage":"ro-RO"},{"@type":"Question","@id":"https:\/\/blog.geostru.eu\/ro\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/#faq-cost-fondazioni-ca","position":5,"url":"https:\/\/blog.geostru.eu\/ro\/fondazioni-ca-rc-sec-ntc-2018-prima-plastificare\/#faq-cost-fondazioni-ca","name":"C\u00e2t cost\u0103 Fondazioni CA \u0219i RC-SEC?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Fondazioni CA cost\u0103 490 \u20ac + TVA \u0219i RC-SEC 390 \u20ac + TVA (RC-SEC-FRP 390 \u20ac), cu licen\u021b\u0103 perpetu\u0103: actualiz\u0103ri \u0219i asisten\u021b\u0103 incluse \u00een primul an, apoi re\u00eennoire anual\u0103 op\u021bional\u0103 egal\u0103 cu 10 % din pre\u021bul de list\u0103. Este disponibil\u0103 o prob\u0103 gratuit\u0103 la cerere.","inLanguage":"ro-RO"},"inLanguage":"ro-RO"}]}},"_links":{"self":[{"href":"https:\/\/blog.geostru.eu\/ro\/wp-json\/wp\/v2\/posts\/15360"}],"collection":[{"href":"https:\/\/blog.geostru.eu\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.geostru.eu\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.geostru.eu\/ro\/wp-json\/wp\/v2\/users\/16658"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.geostru.eu\/ro\/wp-json\/wp\/v2\/comments?post=15360"}],"version-history":[{"count":1,"href":"https:\/\/blog.geostru.eu\/ro\/wp-json\/wp\/v2\/posts\/15360\/revisions"}],"predecessor-version":[{"id":15363,"href":"https:\/\/blog.geostru.eu\/ro\/wp-json\/wp\/v2\/posts\/15360\/revisions\/15363"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.geostru.eu\/ro\/wp-json\/wp\/v2\/media\/15353"}],"wp:attachment":[{"href":"https:\/\/blog.geostru.eu\/ro\/wp-json\/wp\/v2\/media?parent=15360"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.geostru.eu\/ro\/wp-json\/wp\/v2\/categories?post=15360"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.geostru.eu\/ro\/wp-json\/wp\/v2\/tags?post=15360"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}