Design Examples of Steel and Steel-Concrete Composite Bridges - Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges - page 242

3

s s

y

y

1.6

3

60

Figure 4.20 Calculation of flange fillet weld size at supports.

Shear flow at section s - s :

Q Ed S ss
I yy

q ¼ ¼ 2 af vw , d

p
b w g M2 ¼

f u = =

p

430 30

mm 2 f vw , d ¼

25 ¼ 233

: 7N =

0 : 85 1 :

2 10 3 Þ 10 3 3327 : 60 3 151 ð : 5

q ¼ ¼ 2 a 233 : 7

11,863,080 10 4

Then, a¼ 1.64 mm, taken as 8 mm, which is the minimum size.

4.2.6 Check of Lateral Torsional Buckling of the Plate
Girder Compression Flange
To check the safety of the upper compression flange against lateral tor-
sionalbuckling,wehavetocalculatetheelasticcriticalmomentforlateral