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Tehnika
2014, vol. 69, br. 3, str. 385-392
jezik rada: engleski
vrsta rada: izvorni naučni članak
doi:10.5937/tehnika1403385T


Kalibracija i verifikacija modela konačnih elemenata za dugotrajno ponašanje AB greda
Univerzitet u Beogradu, Građevinski fakultet

Projekat

Istraživanje mogucnosti primene otpadnih i recikliranih materijala u betonskim kompozitima, sa ocenom uticaja na životnu sredinu, u cilju promocije održivog gradevinarstva u srbiji (MPNTR - 36017)

Sažetak

U ovom radu je predstavljeno istraživanje sprovedeno u svrhu pronalaženja optimalnog modela konačnih elemenata za predviđanje ponašanja armirano-betonskih greda pod dugotrajnim opterećenjem. U istraživanju je korišćen višenamenski komercijalni softver DIANA. Za kalibraciju modela je odabran benčmark test u vidu proste grede opterećene savijanjem u četiri tačke. Kao rezultat kalibracije, odabrani model se sastojao od linijskih konačnih elemenata sa tri čvora. Odabran je model fiksne prsline u više pravaca. Sadejstvo zategnutog betona izmenu prslina opisano je nelinearnom funkcijom. Odabrana je konstantna rezidualna nosivost pri smicanju. Skupljanje i tečenje je modelirano prema CEB-FIP Model Code 1990. Model je dodatno verifikovan na 14 prostih greda i 6 kontinualnih greda sa dva polja. Rezultati su pokazali dobro slaganje sa eksperimentalnim vrednostima (±15%).

Ključne reči

Reference

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