"188mm2" - 1 õppematerjal

“RAUDBETOONKONSTRUKTSIOONID. PROJEKT”

Valin posti mõõduks b = 250mm NSd - fcd A A s,tot = = fyd 602 10 3 - 0.9 0.85 13.3 250 2 = = -111mm2 0.9 340 0.15 NSd 0.15 602 10 3 A s,min = = = 266mm2 fyd 340 0.003 A = 0.003 250 2 = 188mm2 A s = 266mm2 Valin 4 12 A S = 452mm2 - Kandevõime lo 1800 = =6 b 300 NSd1 =1 NSd Siis c = 0.92 ja sc = 0.92 fyd A s 340 452 s = = = 0.22 fcd A 0.85 13.3 250 2 = c + 2 ( sc - c ) s = 0.92 + 2 ( 0.92 - 0.92) 0.22 = 0.92 NRd = ( fcd A + fyd A s ) =