tugas struktur beton bertulang

7/25/2019 Tugas struktur beton bertulang

1/10

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)


2/10

= (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


3/10

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


4/10


5/10


6/10


7/10

!a. 'i'apa$"a. ga9" s#agai #i"u$


8/10

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)

:.$u" . 'a. *. 'isai"a. 'a&am ga9" #i"u$


9/10

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


10/10

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

tugas struktur beton bertulang

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