Design Examples of Steel and Steel-Concrete Composite Bridges - Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges - page 299

The axial compressive force in the vertical member V 5

( N Ed ¼ 1302.9 kN):

N Ed
N b , Rd 1

: 0

1

w¼ p

F 2

but w 1 : 0

l 2

F +

h i

+ l 2

51+ a l 0 F¼ 0 : : 2

¼ 1

905 2 F¼ 0 : 51+0 : 49 0 ð : 905 0 : 2 Þ +0 : : 082

1

w¼

082 +

p ¼ 0 : 597 but w 1 : 0

082 2 905 2 1 : 1 : 0 :

0 : 597 13520 275

1

Then, N b , Rd ¼ ¼ 2,017,860N

: 1

N b , Rd ¼ 2017 : 9kN > N Ed ¼ 1302 : 9 kN Then O ð : K : Þ

4.3.3.18 Design of the Compression Vertical Member V 4
Following the same procedures adopted for the design the compression ver-
tical member V 5 , we can design the vertical compression member, shown in
Figure 4.72 , carrying a compressive design force of 2226.1 kN, as follows.
To classify the cross section chosen (see Figure 4.72 ),

s

235
f y

r

235
275

e ¼ ¼ ¼ 0 : 924

C 1 ¼ 352mm, t fl ¼ 12, C 1 = t fl ¼ 352 = 12 ¼ 29 : 3 < 30 : 5 Flange is Class 1 ð Þ

d 1 = 35 cm

y

1.6

C 1 = 16.1

x x

C 2 = 35.2
1.6

1.2

y

Figure 4.72 The cross section of the vertical compression member V 4 .