Design Examples of Steel and Steel-Concrete Composite Bridges - Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges - page 437

h i

+ l 2

51+ a l 0 F¼ 0 : : 2

¼ 0

653 2 F¼ 0 : 51+0 : 49 0 ð : 653 0 : 2 Þ +0 : : 824

1

w¼

824 +

p ¼ 0 :

754 but w 1

:

0

824 2 653 2

0 : 0 : 0 :

0 : 754 29,200 275

1

Then, N b , Rd ¼ ¼ 5,504,200N

: 1

N b , Rd ¼ 5504 : 2kN > N Ed ¼ 4433 : 9 kN Then O ð : K : Þ

4.6.3.17 Design of the Compression Vertical Members V 2 and V 4
Following the same procedures adopted for the design the compression
vertical member V 1 , we can design the vertical compression members V 2
and V 4 shown in Figure 4.198 , carrying a compressive design force of
1878.6 kN, as follows. To classify the cross section chosen (see

Figure 4.198 ),

s

235
f y

r

235
275

e ¼ ¼ ¼ 0 : 924

C 1 ¼ 117mm, t fl ¼ 20, C 1 = t fl ¼ 117 =

20 ¼ 5

: < : ð Þ

85 30 5 Flange is Class 1

C 2 ¼ 304mm, t w ¼ 10, C 2 = t fl ¼ 304 = 10 ¼ 30 : 4 < 30 : 5 Web is Class 1 ð Þ

0 ¼ 136 cm 2

A¼ 2 26 2+32 1 :

¼ 32821 cm 4

0 32 3 12 + 2 26 2 3 12 + 26 2 17 2 I x ¼ 1 : = =

0 3 12 + 2 2 26 3 3cm 4 I y ¼ 32 1 : = = 12 ¼ 5861 :

d 1 = 26 cm

y

2

C 1 = 12.7

x x

C 2 = 30.4
2

1.0

y

Figure 4.198 The cross section of the vertical compression members V 2 and V 4 .