Fatigue loading for steel bridge under light rail.
Fatigue loading for steel bridge under light rail.
(OP)
I am assessing existing highway steel box-girder bridge for light rail loads. The fatigue loading is not well defined in the project design criteria. It references fatigue design to AASHTO which deals with highway loads. The main dilema is: how many trains shall be on two-track bridge? According to AREMA: two, if to follow AASHTO ideology: only one.
Greatly appreciate sharing experience on this subject!
Yakpol
Greatly appreciate sharing experience on this subject!
Yakpol





RE: Fatigue loading for steel bridge under light rail.
RE: Fatigue loading for steel bridge under light rail.
Also, for railway structures indefinite number of load cycles is always used.
With steel box girder typical details to be carefully checked will be the diaphragms and cross braces.
RE: Fatigue loading for steel bridge under light rail.
Thank your for reply. I am dealing with an existing roadway bridge.Infinite number of cycles for two trains kills every single detail. This criteria is very good for a new bridge, but too conservative for existing.
Yakpol
RE: Fatigue loading for steel bridge under light rail.
HTH
VoD