Geotehnički aspekti građevinarstva i zemljotresno inženjerstvo 2025, Vrnjačka Banja, 15 – 17. oktobar 2025. (pp. 28-56)
АУТОР(И) / AUTHOR(S): Vojkan Jovičić 
, Nina Jurečič, Gregor Vilhar
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DOI: 10.46793/GEOAG25.028J
САЖЕТАК / ABSTRACT:
Više konstitutivnih modela ponašanja tla je razvijeno kako bi se obuhvatile glavne karakteristike mehaničkog ponašanja prekonsolidovanih glina, kao što su nelinearni odnos napona i deformacije pri malim i velikim deformacijama, kao i efekat istorije opterećenja. Kinematički modeli učvršćivanja uključuju ove karakteristike kako bi omogućili realistična predviđanja interakcije konstrukcije i tla. U radu je prikazan nastavak razvoja kinematičkog konstitutivnog modela BRICK, sa ciljem uključivanja modeliranja anizotropije i uticaja strukture tla na mehaničko ponašanje prekonsolidovanih glina. Laboratorijski testovi visokog kvaliteta na Londonskoj glini su korišteni za kalibraciju ulaznih parametara modela na osnovu ponašanja laboratorijskog uzorka, a dokumentovan granični problem iskopa tunela korišćen je za validaciju modela u proračunima sa upotrebom metode konačnih elemenata. Sprovedena je sveobuhvatna komparativna studija između predviđanja različitih kinematičkih modela sa učvršćivanjem, koristeći dva različita softverska paketa. Uočeno je da su rezultati predviđanja sa SA_BRICK modelom u dobrom saglasju sa podacima dobijenim iz osmatranja, kao i to da SA_BRICK model daje unapređena predviđanja u poređenju sa drugim kinematičkim modelima učvršćivanja, naročito u pogledu širine profila sleganja neposredno iznad tunela. Napredna predviđanja deformacija tla izazvanih iskopom tunela mogu se efikasno koristiti za ublažavanje mogućih oštećenja nadzemnih konstrukcija koje su u zoni uticaja gradnje tunela u urbanom okruženju.
КЉУЧНЕ РЕЧИ / KEYWORDS:
konstitutivno modeliranje, prekonsoldivane gline, kinematičko učvršćivanje, numeričke analize, iskop tunela
ПРОЈЕКАТ / ACKNOWLEDGEMENT:
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