Sažetak
Uvod/cilj: Dinamička analiza seizmičkog odgovora lučne brane od betona predstavlja složen problem gde predstavljanje ponašanja materijala zahteva neki oblik nelinearnog modela, naročito ako je beton izložen velikom opterećenju temeljne površine. U slučajevima kada dolazi do masivnih pomeranja tla, velike prsline mogu da se formiraju na brani, naročito u njenoj osnovi, kao i u blizini iznenadnih promena u geometriji.
Metode: Ova analiza je zasnovana na numeričkoj simulaciji dinamičkog odgovora. Rad se zasniva na korišćenju metode konačnih elemenata pomoću programa ANSYS 12.1. Brana je modelovana u dve dimenzije. Korišćene su četiri vrste analiza: statička analiza, modalna analiza, seizmička analiza sa pobudom dva akcelerograma (Asnam 1980 i Bumerdes 2003) i spektralna analiza.
Rezultati: Ova analiza ukazala je na ranjivost brane Brezina od zemljotresa jačine onog u Bumerdesu sa velikim opterećenjima na temelj strukture.
Zaključci: Na osnovu ove studije zaključeno je da bi zemljotres veće jačine od onog u Bumerdesu izazvao strukturna oštećenja i prsline na brani Brezina koji bi ugrozili njenu vodonepropusnost i trajnost.
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Reference
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