7/31/2019 Garis Netral

1/2

PORTAL TENGAH MEMANJANG L.1 PROFIL INP

fc' = 24 Mpa L = 560 cm

E. Baja = Mpa bo= 670 cm

E. Beton = 4700 fc' = Mpa

be = 140 cm

Data profil INP -

Ix = cm4 ts = 12 cm ts = 12 cm

h = cm (tebal plat)

As = cm2 h = 17.3 cm

bf = cm

garis netral

h = 42.5 cm 27.3 cm

1/2h cm

bf = 16.3 cm

- Lebar effektif (be)

be= 1/4.L

= 1/4 . 560

= 140 cm

be = bo(jarak antar balok) = 670 cm

Be = bf + 16.ts = cm

diambil beff = 140 cm

n =

=

= 8.69 ------

Ac = be . Ts Ac

= 140 x 12 n

= cm2 = cm2

At = As + be

= 132 + 140= cm2

dt = 1/2. h + 1/2.ts Ic = 1/12 . (beff/n) . 10^3

= 1/2 x 42.5 + 1/2x 12 = 1 140 10 ^3

= cm 12 9

dc = = cm4

= It = Ic + (Ac . dc^2) + Ix + (As . ds^2)

= cm4

= cm

ds = (beff/At) . Dt

=

= x 10^-6

= cm

=E

7/10/2012 3:35

200000

23025

42 1/2

E. Baja

E. Beton

200000

23025

1680

208.3

42 1/2

36970

42.5

132

16.3

Ac(eq) =

21.3

272.0

27.25

9.0

x

=1680

9

186.7

272.0x 27.25

14.03

x

1296.2963

358033.88

358033.88

560

272.0x 27.25

13.22

140

132

(As/At) . dt

10^-4

6.393

=K = 639.34621 cm3

639.34621

7/31/2019 Garis Netral

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PORTAL TEPI B &c MEMANJANG L.2 (ATAP DAG) PROFIL INP

fc' = 24 Mpa L = 560 cm

E. Baja = Mpa bo= 540 cm

E. Beton = 4700 fc' = Mpa

be = 46.67 cm

Data profil INP -

Ix = cm4 ts = 10 cm ts = 10 cm

h = cm (tebal plat)

As = cm2 h = 21.2 cm

bf = cm

garis netral

h = 38.0 cm 24.0 cm

1/2h cm

bf = 14.9 cm

- Lebar effektif (be)

be= 1/12.L

= 1/12 . 560

= 46.7 cm

be = bo(jarak antar balok) = 540 cm

Be = bf + 16.ts = cm

diambil beff = 47 cm

n =

=

= 8.69 ------

Ac = be . Ts Ac

= 46.7 x 10 n

= cm2 = cm2

At = As + be

= 107 + 46.7

= cm2

dt = 1/2. h + 1/2.ts Ic = 1/12 . (beff/n) . 10^3

= 1/2 x 38.0 + 1/2x 10 = 1 46.7 10 ^3

= cm 12 9

dc = = cm4

= It = Ic + (Ac . dc^2) + Ix + (As . ds^2)

= cm4

= cm

ds = (beff/At) . dt

=

= x 10^-6

= cm= E

38

200000

23025

7/10/2012 3:3538

38

24010

107

14.9

19.0

174.9

E. Baja

200000

23025

Ac(eq) ==

466.666667

9

466.666667 51.9

x x

2.865

9.0

16.71

K =160454.11

= 286.5251946.6666667

x 24560

(As/At) . dt 432.09877

107x 24

153.7 286.52519

7.29 10^-4

cm3

153.7 160454.11

153.7

24

E. Beton