7.10 Numerical Examples
247
Fig. 7.12 Two-cell tubular
section
q 2
q 1
0.09cm
S = 63 cm
0.09cm
S = 6 7 c m
0.08cm
S=67cm
S=48cm
S=33cm
Cell-1
Cell-2
0.09cm
0.06cm
a 1 =
dS
t
(including the web)
=
67
0.06
+
33
0.09
Therefore,
a 1 = 148.3
For Cell 2,
a 2 =
33
0.09
+
63
0.09
+
48
0.09
+
67
0.08
Therefore,
a 2 = 2409
For web,
a 12 =
33
0.09
= 366
Now, for Cell 1,
2Gθ =
1
A 1
(a 1 q 1 − a 12 q 2 )
=
1
680
(1483q 1 − 366q 2 )
Therefore,
2Gθ = 2.189q 1 − 0.54q 2
(i)
For Cell 2,