Design Examples of Steel and Steel-Concrete Composite Bridges - Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges - page 444

Q D+L+ f = 574 kN

Q D+L+ f = 574 kN

N 1

N 2

Figure 4.204 The connection between a stringer and a cross girder.

required number of bolts, following the rules specified in EC3 (BS EN
1993-1-8) [2.13], as follows:

a V f ub A
g M2

F v , Rd ¼

0 : 6 800 459

1

F v , Rd ¼ ¼ 1,76,256N

: 25

Then, F v,Rd equals 176 kN (for bolts in single shear) and 353 kN (for
bolts in double shear):

k s nm

F s , Rd ¼

g M3 F p , C

F p , C ¼ 0 : 7 f ub A s ¼ 0 : 7 800 573 ¼ 320,880N

1 : 0 1 : 0 0 : 4

F s , Rd , ser ¼ 320,880 ¼ 116,683 : 6N :

1 : 1

Then, F s,Rd ¼ 117 kN (for bolts in single shear at serviceability limit
states) and F s,Rd ¼ 234 kN (for bolts in double shear at serviceability limit
states). At ultimate limit states, F s,Rd,ult can be calculated as follows:

1 : 0 1 : 0 0 : 4

F s , Rd , ult ¼ 320,880 ¼ 102,682N :

1 : 25

Then, F s,Rd ¼ 103 kN (for bolts in single shear at ultimate limit states)
and F s,Rd ¼ 206 kN (for bolts in double shear at ultimate limit states):

574
206 ¼ 2

N 1 ¼ : 8 taken as 3 bolts,

574
103 ¼ 5

N 2 ¼ : 6 taken as 6 bolts