Design Examples of Steel and Steel-Concrete Composite Bridges - Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges - page 309

35 cm

y

2

x x

1.2

2

y

Figure 4.78 The cross section of the diagonal tension member D 3 .

Af y
g M0 ¼

183 : 2 275 100

1

N pl , Rd ¼ ¼ 5,038,000N ¼ 5038 kN >N Ed

: 0

¼ 4086 : 1kN

0 : 9 A net f u 0 : 9 135 : 2 430

N u , Rd ¼

g M2 ¼

¼ 4,185,792N

1 : 25

¼ 4185 : 8kN > N Ed ¼ 4086 : 1kN

4.3.3.24 Design of the Diagonal Tension Member D 2
The diagonal member D 2 , shown in Figure 4.79 , carrying a maximum
tensile design force of 5372.3 kN can be designed as follows:
The bolts used in connecting the member with gusset plates are M27
high-strength pretensioned bolts having a clearance of 3 mm (hole diameter
Ø ¼ 30 mm):

92 cm 2 A¼ 2 35 2 : 8+34 : 4 1 : 8 ¼ 257 :

72 cm 2 A net ¼ 257 : 92 8 3 : 0 2 ¼ 190 :

35 cm

y

2.8

x x

1.8

2.8

y

Figure 4.79 The cross section of the diagonal tension member D 2 .