Design Examples of Steel and Steel-Concrete Composite Bridges - Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges - page 231

305.5 mm

27.9

19.1

x x

17.3

C 1 = 125

27.9

Figure 4.11 The cross-section of cross girders (UB 914305253).

Choose UB 914 305 253 (equivalent to American W36 170),
shown in Figure 4.11 . W PL around x - x¼ 10,940 cm 3 . To classify the cross
section chosen,

s

235
f y

r

235
275

e ¼ ¼ ¼ 0 : 924

C 1 ¼ 125mm, t fl ¼ 27 : 9, C 1 = t fl ¼ 125 = 27 : 9 ¼ 4 : 48 9 0 : 924

¼ 8 : 316 Cross girder flange is class 1 ð Þ

C 2 ¼ 824 : 4mm, t w ¼ 17 : 3, C 1 = t fl ¼ 824 : 4 = 17 : 3 ¼ 47 : 7 72 0 : 924

¼ 66 : 5 Cross girder web is class 1 ð Þ

Check of Bending Resistance

10940 10 3

W pl f y
g M0 ¼

275

M c , Rd ¼ ¼ 3,008,500,000Nmm

1 : 0

¼ 3008 : > M Ed ¼ 2779

5kNm : 42 kNm Then O ð : K : Þ

Check of Shear Resistance

f y =

p

Þ 275 =

p

A v ð

862 : 6 17 : 3

V pl , Rd ¼ ¼ ¼ 2,369,341N

g M0 1 : 0

¼ 2369 : 3kN > Q Ed ¼ 1502 : 7 kN Then O ð : K : Þ