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METODA ELEMENTELOR FINITE – L6 Catedra de Constructii Hidrotehnice

METODA ELEMENTELOR FINITE – L6 Catedra de Constructii Hidrotehnice. ANALIZE CUPLATE – STRUCTURALE SI CAMP TERMIC. Se urmareste analiza efectului cumulat al solicitarilor mecanice si a celor datorate variatiei campului termic asupra unei structuri masive ( baraj de greutate ).

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METODA ELEMENTELOR FINITE – L6 Catedra de Constructii Hidrotehnice

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  1. METODA ELEMENTELOR FINITE – L6Catedra de ConstructiiHidrotehnice ANALIZE CUPLATE – STRUCTURALE SI CAMP TERMIC • Se urmaresteanalizaefectuluicumulatal solicitarilormecanicesi a celordatoratevariatieicampuluitermicasuprauneistructurimasive (baraj de greutate). • SOLICITARI MECANICE: • Presiunehidrostaticaaplicatapeparamentulamonte • Greutateaproprie • EFECTELE MECANICE ALE CAMPULUI TERMIC: • Deplasariblocate la baza, in lungulsuprafetei de contact cu roca • Camp termiccalculat – sezoncald • Camp termiccalculat – sezonrece

  2. METODA ELEMENTELOR FINITE – L6Catedra de ConstructiiHidrotehnice • MODELARE, IPOTEZE DE LUCRU: • Model 2D cu geometriesimplificata (renuntarea la detalii) • Nivelulapei la coronament • Distributiatemperaturilorpeceledoualimite (amontesiaval) ale sectiunii se consideraconstanta, ca medie a temperaturiisezoniere in apa (paramentamonte) siaer (paramentaval).

  3. METODA ELEMENTELOR FINITE – L6Catedra de ConstructiiHidrotehnice

  4. METODA ELEMENTELOR FINITE – L6Catedra de ConstructiiHidrotehnice • CAZURI DE INCARCARE (LOAD CASES): • Presiunehidrostatica LC01 • Greutateproprie LC02 • Efecte din temperaturavara LC03 • Efecte din temperaturaiarna LC04

  5. METODA ELEMENTELOR FINITE – L6Catedra de ConstructiiHidrotehnice • MODEL 1 – STRUCTURAL • TIPE ELEMENTE: PLANE 42 (42) - stare de deformatieplana (KOPT3) • SET CONSTANTE REALE: nu estecazul • PROPRIETATI MATERIAL: • Eb = 2 E5 KPa • m = 0.2 • a = 1.2E-5 grd-1 • r = 2.4 t/m3

  6. METODA ELEMENTELOR FINITE – L6Catedra de ConstructiiHidrotehnice MODEL 2 – TERMIC TIPE ELEMENTE: PLANE 55 (55) SET CONSTANTE REALE: nu estecazul PROPRIETATI MATERIAL: KXX = 1 Nota: valoareaconductivitatiitermice nu esterelevanta in acestcaz particular, deoarece nu se face o analiza a pierderilor (transferului) de calduracinumaicalcululdistributieitemperaturilor in masa de beton, considerandcazulstationar (cu conditii de marginementinuteconstante)

  7. METODA ELEMENTELOR FINITE – L6Catedra de ConstructiiHidrotehnice Distributiatemperaturiloriarna(°C) Distributiatemperaturilorvara(°C)

  8. METODA ELEMENTELOR FINITE – L6Catedra de ConstructiiHidrotehnice SE COMPLETEAZA CU NOTITELE DE LA CURS !

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