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Kehilangan Tegangan akibat Relaksasi fst’ (30) / fy = 1159 / (0,85 x 1862 ) = 0,732

Kehilangan Tegangan akibat Relaksasi fst’ (30) / fy = 1159 / (0,85 x 1862 ) = 0,732 RET = { 1159 x ( log 26280 - log 720 ) / 10 } x (0,732 - 0,55 ) = 33 Mpa Kehilangan Tegangan akibat Rangkak: CR = ( UCR ) (SCF ) (PCR ) x fc

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Kehilangan Tegangan akibat Relaksasi fst’ (30) / fy = 1159 / (0,85 x 1862 ) = 0,732

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  1. Kehilangan Tegangan akibat Relaksasi fst’ (30) / fy = 1159 / (0,85 x 1862 ) = 0,732 RET = { 1159 x ( log 26280 - log 720 ) / 10 } x (0,732 - 0,55 ) = 33 Mpa Kehilangan Tegangan akibat Rangkak: CR = ( UCR ) (SCF ) (PCR ) x fc UCR = ( 95 - 20 x E c ksi )=(95 - 20 x 4,415 ) = 6,7 < 11 dipakai 11 SCF = 0,87 ; V / S = 3 , SCF = 0.87--------- Tabel 3 PCR = 0.65 ; 30 hari--1095 hari PCR = ( AUC ) t - ( AUC ) ti = 1 - 0,35 = 0.65 ------------Tabel 5 fc’ tepat pd tendon ? fst (30) sesudah kehilangan Relaksasi =1111 - 33 = 1078 Mpa F = 1078 x 1975 = 2129050 N = 2129 KN h’ e 47

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