Staggered cross frames in skewed bridges
Staggered cross frames in skewed bridges
(OP)
I recently designed a new steel bridge on a 45 degree skew with staggered cross frames. I received a comment from the DOT reviewer that this increases the possibility of fatigue cracks. I was puzzled by this comment, as everything I have read says that staggered cross frames reduces cross frame forces. If you reduce the connection force shouldn't the magnitude of the stress go down? I do understand that it increases the lateral bending in the flanges.





RE: Staggered cross frames in skewed bridges
https://www.fhwa.dot.gov/bridge/steel/pubs/hif1600...
If this fails, you should ask for a source for his statement.
RE: Staggered cross frames in skewed bridges
RE: Staggered cross frames in skewed bridges
RE: Staggered cross frames in skewed bridges
RE: Staggered cross frames in skewed bridges
RE: Staggered cross frames in skewed bridges