Civil Engineering Reference
In-Depth Information
Fixed bearing force at center pier (
n
= 2 spans)
F
= 0.75
F
= 1.00
F
= (
α
0
Δ
T)/(
α
Δ
t)
FIGURE 4.24
An example relationship between fixed bearing force, length of the span, deck
and track stiffness, and rail size for two expansion/contraction ratios.
Deck
Deck
Track
Track
2
3
1
4
45
'
45
'
F
E
E
F
k
t
k
t
k
d
k
d
5
6
Span
Span
FIGURE E4.10
