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TUGAS 1
SI – 3121 Struktur Beton
Dosen : Prof.Bambang Budiono,Ir, M.E.,Ph.D
Disusun oleh :
Nama : Windya Wijaya
Nim : 15013024
Program Studi Teknik Sipil
Fakultas Teknik Sipil dan Lingkungan
Institut Teknologi Bandung
2015
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Windya Wijaya15013024
1.
A s=8×509mm2=4072mm2
A s×f y=0.85×f c'×a×b
A s×f y=0.85×f c'×β1×c×b
4072×400=0.85×27.5×0.85×c×300
c=273.26mm
ε y=f yE s
= 400200,000
=0.002
ε s=d−cc×ε c=
452.5−273.26273.26
×0.003=1.97×10−3<ε y
2.
1
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Windya Wijaya15013024
A s=3×509mm2=1527mm2
A s×f y=0.85×f c'×a×b
A s×f y=0.85×f c'×β1×c×b
1527×400=0.85×27.5×0.85×c×300
c=102.47mm
ε y=f yE s
= 400200,000
=0.002
ε s=d−cc×ε c=
452.5−102.47102.47
×0.003=1.02×10−2>ε y
3.
A s=6×509mm2=3054mm2
A s×f y=0.85×f c'×a×b
A s×f y=0.85×f c'×β1×c×b
3054×400=0.85×27.5×0.85×c×300
c=204.94mm
ε y=f yE s
= 400200,000
=0.002
ε s=d−cc×ε c=
452.5−204.94204.94
×0.003=3.62×10−3>ε y
2