Page 231 - Dasar Perencanaan Struktur beton bertulang OK 1_Neat

2
MLx = MLy = koefisien.Wu.l x . 0,001
MLx = MLy = 38 x 12,84 x .5 2 . 0,001

MLx = MLy = 12,198 KNm

4. Menghitung tulangan
Tebal pelat , h = 200 mm, Selimut beton, p = 20 mm

Perkiraan diameter tulangan utama arah x dan arah y,
ϕ = 10 mm
 10
d = h-p- = 200-20- =165mm
x
2 2
D y 10
d = h-p-D - = 200-20-10- =155 mm
x
y
2 2
 Tulangan daerah Tumpuan arah X

Mu = ρ.0,8.fy 1-0,588 fy 
bd x 2   f'c  

14,766x10 6  240 

2 = ρ.0,8.240 1-0,588 
1000x165  25 
2
0,54 = 192ρ-1083,8ρ
ρ = 0,0029
1.0 1.0
ρ = = = 0,0042  ρ < ρ
min fy 240 min

ρ = ρ = 0,0042
min

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