Design Examples of Steel and Steel-Concrete Composite Bridges - Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges - page 302

l 1 ¼ 93 : 9 0 : 924 ¼ 86 : 7636

6750
87

1

l¼

5 7636 ¼ 0

: 89

: 86 :

The axial compressive force in the vertical member V 5

( N Ed ¼ 3190.7 kN):

N Ed

N b , Rd 1

: 0

wAf y
g M1

where N b , Rd ¼

1
F +

w¼ p but w 1 : 0

l 2 F 2

h i

+ l 2

51+ a l 0

F¼ 0 : :

2

¼ 1

89 2 F¼ 0 : 51+0 : 49 0 ð : 89 0 : 2 Þ +0 : : 065

1

065 +

p

w¼ ¼ 0 : 606 but w 1 : 0

065 2 89 2

1 : 1 : 0 :

0 : 606 22,432 275

1

Then, N b , Rd ¼ ¼ 3,398,448N

: 1

N b , Rd ¼ 3398 : 4kN > N Ed ¼ 3190 : 7 kN Then O ð : K : Þ

4.3.3.20 Design of the Compression Vertical Member V 2
The compression vertical member V 2 , shown in Figure 4.74 , carrying
a compressive design force of 4195.1 kN can be designed as follows.
To classify the cross section chosen (see Figure 4.74 ) ,

d 1 = 35 cm

y

3.2

C 1 = 15.6

x x

C 2 = 32.0
3.2

2.2

y

Figure 4.74 The cross section of the vertical compression member V 2 .