Wind load on railway signs 2

[FEMdude]

Any ideas where to find estimates for wind loads caused by a train passing by a traffic sign? Taking train's max speed (e.g. 200 mph) will give forces which are in my opinion too high. Any suggestions?

 

[IngNicola]

First of all you must say what's the distance from traffic sign to the axis of the train (ag).
Then you have to consider the aeredynamics of your train (K = aerodynamic factor).

For examples:

ag = 2.3 meter
q1k = 1.75 kN/m2 (wind load)
k = 1 (bad aerodynamic)
= 0.85 (quite good aerodynamic)
= 0.60 (good aerodynamic)

q = k*q1k (wind load)

bye bye
Ing. Nicola

 

[JStephen]

If the train in question really does go 200 mph, I would think you'd be able to get some input from the manufacturer of the equipment.

 

[ctcray]

try this link:

http://ntl.bts.gov/lib/13000/13000/13047/ord9911.pdf

 

[FEMdude]

Thanks!