Design Examples of Steel and Steel-Concrete Composite Bridges - Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges - page 253

Q D+L+ f = 1502.7 kN

N 3

N 4

Figure 4.30 The connection between cross girder and main plate girder.

1502 7

206 ¼ 7

:

N 3 ¼ : 3 taken as 8 bolts,

1502 7

103 ¼ 14

:

N 2 ¼ : 9 taken as 16 bolts

4.2.12 Design of Field Splices
Figure 4.31 shows the locations of filed splices for the investigated bridge.
Designing the splice requires determination of size of connecting plates as
well as the number of bolts of the filed splice shown in Figure 4.32 . The area
of the flange plate equals to 60 3 ¼ 180 cm 2 ; this can be compensated by
three flange splice plates having a cross-sectional area of 60 1.6 and
2 27 1.6 cm 2 with a total area of 182.4 cm 2 , which is greater than the
original area, while the area of web plate ¼ 300 1.6 ¼ 480 cm 2 can be com-
pensated by two web splice plates having cross-sectional area of
2 290 1.0 cm 2 with a total area of 580 cm 2 , which is governed by the
minimum thickness

(10 mm) of plates used in railway steel bridges.