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7/25/2019 Tugas struktur beton bertulang
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Tugas 1
Xc1 = 250 Xc2 = 150
Yc1 = 300 Yc2 = 100
A1 = 100000 A2 = 60000
Xc = (100000 x 250 + 60000 x 150) / 160000
= 212,5 mm
Yc = (100000 x 300 + 60000 x 100) / 160000
= 225 mm
Xp = (0,85 x fc x Ag x Xc + Ai fy xi) / (0,85 x fc x Ag + Ai fy)
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= (0,85 x 30 x 160000 x 212,5 + 1,44x108) / (0,85 x 30 x 160000 +
6,4x105)
= 214,1 mm
Yp = (0,85 x fc x Ag x Yc + Ai fy yi) / (0,85 x fc x Ag + Ai fy)
= (0,85 x 30 x 160000 x 225 + 1,52x108) / (0,85 x 30 x 160000 +
6,4x105)
= 226,6 mm
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Tugas 2
!i"#$a%ui
s 500 mm
s#&imu$ 50 mm
' 450 mm
Ag 250000 mm
As 2500 mm
As 2500 mm
fc 30 *a
1 0-85
fy 400 *a
.
82450
0
65800
0
*#.g%i$u.g . 'a.
Pn=0.85f c'(Ag As )+ Asfy
Pn=0.8530(500222500 )+22500400
Pn=8247500NPo=0.8Pn
Po=6598000N
*#.g%i$u.g . 'a. *. (saa$ s= 0-002)
fs= sEs
fs=0.002200000
fs=400MPa
0.003+ s
c=d
c=270mm
a=1c
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!a. 'i'apa$"a. ga9" s#agai #i"u$
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0 200000000 400000000 600000000 800000000 1000000000
0
1000000
2000000
3000000
4000000
5000000
6000000
000000
8000000
000000
Diagram Interaksi Pn dan Mn
Mn (N.mm)
Pn (N)
:.$u" . 'a. *. 'isai"a. 'a&am ga9" #i"u$
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0 200000000 400000000 600000000 800000000 1000000000
0
1000000
2000000
3000000
4000000
5000000
6000000
/000000
8000000
000000
Diagram Interaksi Pn dan Mn
+. ;s *. +. ;s *. As&i 0-+. ;s 0-*. 0-+. ;s 0-*. As&i
Mn (N.mm)
Pn (N)
:.$u" #=2
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Cc=0.85f c'ab
Cc=1294746N
Cs=f s'A s
'
Cs=1000000N
Ts=fsAs
Ts=1000000N
Pn=CT
Pn=1166968N
Mn=Cc(2500.5a )+Cs200+Ts(d250)
Mn=632390991N
e=Mn
Pn
e=541.91
2eb=543.89
!#.ga. s= 0-0083 'i'apa$ ga&a$ 0-36
*a"a
Pn=1166968N Mn=632390991N
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