an gording trekstang dan ikatan angin triana jooss
TRANSCRIPT
PERENCANAAN GORDING, TREKSTANG, DAN IKATAN ANGIN A. PERENCANAAN GORDING JARAK MIRING GORDING R JARAK MENDATAR GORDING JARAK TEGAK GORDING DICOBA PROFIL Berat Sx Sy Ix Iy Mutu Baja 1. Beban Mati a. Penutup Atap W Asbes W Penutup Atap x R Beban Sendiri qD qdy qdx = = = 2.697 2.500 1.011 m m m JAK = = 22 5
= = = = = =
5.000 1.240 0.233 1.850 0.247 37.000
lb/ft in in in in Fu Fy
= = = = = = =
7.382 20.320 3.818 77.003 10.281 370.000 240.000
kg/m cm cm cm cm Mpa Mpa
= = = = = = = =
11.000 29.666 7.382 48.047
kg/m kg/m kg/m kg/m
qd x sin 22 18.018 kg/m qd x cos 22 44.540 kg/m
2. Beban Angin W Angin Koefisien Angin Tekan Koefisien Angin Hisap Wx Tekan
= = = = = = = = = = =
25 0.02 0.04 -0.4 c Tekan 0.04 1.011 0 c Hisap -0.4 -10.113
kg/m x kg/m
-
0.4
x x kg/m x x kg/m
W 25
x x
h 1.011
Wy Tekan Wx Hisap
W 25
x x
h 1.011
3. Beban Hujan H
= = = = =
40 40 60.413 H 60.413
kg/m x x
0.8 0.8
x x
22
Hx
Sin 22 0.375
Hy
= = = =
22.655 H 60.413 56.003
kg/m x x kg/m
Cos 22 0.927
4. Beban Hiidup P Px
= = = =
100 P 100 92.7
kg x x kg
Cos 22 0.927
Py
= = =
Bidang Momen L L MDlx
= = = = = = = = = = = = = = = = =
5 25 139.188 3.160 -31.604 70.796 115.875
m m2 x kg.m x x kg.m x x kg.m x x kg.m x x kg.m 44.540 x 25
Mwtekan x
W tekan 1.011
x x
L 25
Mwhisap x
W hisap -10.113
x x
L 25
Mhujan x
Hx 22.655
x x
L 25
M Lx
Px 92.7
x x
l 5
Kombinasi Pembebanan 1,4 D = 194.8626 kg.m 1,2 D + 1,6 L + 0,5 H = 387.8232 kg.m 1,2 D + 1,6 H + 0,8 W = 282.8274 kg.m 1,2 D + 1,3 W + L + 0,5 H = 322.4067 kg.m Dari kombinasi pembebanan diatas Beban yang= terbesar Mux = 387.8232 Mux < Mn Mn tergantung pada kelangsingan batang () Diket : tf = tw = Fy = Fu =
387.8231693
kg.m
0.273 0.258 240 370
in in Mpa Mpa
= =
Flens
=
h b W p r
Badan
=
p r
= = = = = = = = = = = = = =
1.625 1 1.24 b/(2.tf) 2.743589744 170/fy 10.97 370/fy-fr 28.46 hw/tw 6.298449612 1680/fy 108.44 2250/fy 145.23 Z
in in in = = = = = =
= = = b/(26,9342) 170/240 370/240-70 41,275/6,5532 1680/240 2250/240
Karena < p, maka termasuk penampang kompak Mn=Mp = Z.fy = 23367,9 x 240 = 5608309 Nmm Mux < Mn 387.8231693 < 0,9.Mn 387.8231693 < 0.9 x 387.8231693 < 504.7478 kg.m Cek Lendutan LX E qx qy Px Py Ly max x
= =
1,15.W 23367.95
5608308.783 ok
y
= = = = = = = = = = = = = = = = = = = = =
500 21000000 44.54001 18.0178 92.7 37.5 160 L/240 2.083 5 384 5 384 0.013021 0.224154 5 384 5 384 0.013021 0.007123
cm N/cm kg/m kg/m kg kg cm = cm x x x cm x x x cm
(jarak kuda-kuda)
(jarak trekstang) 500/240 qx.l EI 27837507382 1617059088 17.21489807 qy.l EI 118081481.2 215899240.5 0.546928655 + + + + + + 1 48 1 48 0.020833 1 48 1 48 0.020833
= = =
x + =0.050245015 + 0.224 cm
y 0.00005073712900
max
> 2.083 >
0.224 ok
AN IKATAN ANGIN sin 22 cos 22 m
0.375 0.927
) )
R 2.697
P 100 37.5
x x kg
sin 22 0.375
6.9342 6.5532
mm mm
41.275 mm 38.0492 mm 20319.96 mm b/(26,9342)
370/240-70 41,275/6,5532 1680/240 2250/240
mm
x x x x x x
px. L EI 139050 1617059088 0.0000860 py. L EI 18000 215899240.5 0.00008337222
C. PERENCANAAN IKATAN ANGIN W angin c angin tekan c angin hisap L (jarak kuda-kuda) h ( jarak vertikal gording ) x 3 h h beban angin pada kuda-kuda W mutu baja 37 =
= = = = = = = = = = fu fy
25 0.04 -0.4 5
kg/m
m
(R.sin).2 (3.sin 22).2 2.02275 m c.w.h 2.02275 = =
kg/m 370 240
Mpa Mpa tg
= = = = =
37 24 h/L 0.40455 31.25
kg/mm kg/mm
R1=R2
= = =
1/2.W.L 5.056875 0.855
Cos
gaya yang bekerja pada ikatan angin S1 = Nu Nu 7.688816 Ag Ag 0.355964 d d Nu 7.688816 7.688816 Ag Ag 0.369433 d d = = = = = = = = = = = = = = = =
S2
1.3.S 0,9 (Ag.fy) 0,9 (Ag.24) 0.355964 mm 1/4..d 1/4..d 0.453457 0.673392 mm 0,75(0,75.Ag)fu 0,75(0,75.Ag)37 20.8125 Ag 0.369433 mm 1/4..d 1/4..d 0.470615 0.686014 mm
= = =
R1/cos 5.914474 7.688816
=
0.026512 Inchi
tersedia ukuran 1/16
=
0.027008 Inchi
tersedia ukuran 1/16
dari dua haasil kombinasi Nu tersebut di ambil yang terbesar, jadi untuk ikatan angin ini di pakai Profil Baja bulat dengan diameter
0.0625
inchi
tersedia ukuran 1/16
=
0.0625
inchi
tersedia ukuran 1/16
=
0.0625 inchi
B. PERENCANAAN TREKSTANG Atap asbes = hujan =
11 H
jarak trekstang jarak miring antar gording mutu baja 37 fu fy beban gording
beban atap
D
jumlah beban (PU) Nu fy fu Nu Nu 68.49939 Ag Ag 3.171268 d d Nu
= = = = = = = = = = = = = = = = =
kg/m (40-0,8)R = = (40-0,8.22) 2.697 = 60.4128 kg/m 1.6 m 2.697 m 370 Mpa 240 Mpa q gording x jarak antar trekstang 7.382 x 1.6 11.811 kg q atap x jarak antar trekstang x jarak antar gording 29.666 x 1.6 x 2.5 118.664 kg beban goding + beban atap 11.811 + 118.664 130.475 kg 1,4D = 1,4.59.277 = 182.665 kg Psin = 182.665 x sin 22 = 68.49939 kg kg/mm 240 Mpa = 24 kg/mm 370 Mpa = 37
< = = = = = = = =
Nn 0,9. (Ag.fy) 0,9.(Ag.24) 3.171268 mm 1/4..d 1/4..d 4.039832 2.009933 0.75(0,75.Ag)fu
mm
=
0.079131 inchi
68.49939 68.49939 Ag Ag 3.291262 d d
= = = = = = =
0.75(0.75.Ag)37 20.8125 Ag 3.291262 mm 1/4..d 1/4..d 4.19269 2.047606 mm
=
0.080614 inchi
tersedia ukuran
1/8
=
0.125
Dari hasil kombinasi Nu tersebut di ambil yang terbesar, jadi untuk trekstang ini dipake profil baja bulat dengan diameter
0.125
inchi
inchi