Design Examples of Steel and Steel-Concrete Composite Bridges - Finite Element Analysis and Design of Steel and Steel-Concrete Composite Bridges - page 380

50

3

37.6

41

146

56.4
y

y

270 cm

y 1

y 1

1.6

136 135

y 0

y 0

54

Figure 4.143 Calculation of properties of area for main plate girder.

Inertia about y 1 - y 1 ¼ 50 3 3 5 2

½ = 12 + 50 3 134 :

+54 3 3 5 2

½ = 12 + 54 3 131 :

4 3 3 2 +1 ½ : 6 191 : = 12 + 1 : 6 191 : 4 34 :

½ :

6 37

:

6 3

= :

6 37

:

6 121

:

2 2

+1 12 + 1

+54 3 3 5 2

½ = 12 + 54 3 141 :

+50 3 3 5 2 3cm 4 ½ = 12 + 50 3 144 : ¼ 14,076,983 :

7cm 3

W eff , min ¼ 14,076,983 : 3 = 146 ¼ 96417 :

Check of Bending Resistance

W eff , min f y
g M0

7 10 3

96,417 : 275

M c , Rd ¼ ¼ ¼ 26,514,900,000Nmm

:

1 0

¼ 26514 : 9kNm > M Ed ¼ 20,285 : 7 kNm Then O ð : K : Þ