Design Examples of Steel and Steel-Concrete Composite Bridges - Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges - page 252

Q D+L+ f = 599.5 kN Q D+L+ f = 599.5 kN

N 1

N 2

Figure 4.29 The connection between stringer and cross girder.

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

k s nm
g M3 F p , C

F s , Rd ¼

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):

599 5

206 ¼ 2

:

N 1 ¼ : 9 taken as 3 bolts,

:

599 5

103 ¼ 5

N 2 ¼ : 8 taken as 6 bolts

4.2.11 Design of Cross Girder-Main Plate Girder connection
The cross girder is designed as a simply supported beam on main plate
girders; therefore, once again, the connection is mainly transferring
shear forces (maximum reaction from cross girders of 1502.7 kN) (see
Figure 4.30 ) . We can determine the required number of bolts as follows: