First Harmonic in Bridge calculations
First Harmonic in Bridge calculations
(OP)
I am designing a steel truss pedestrian bridge and I have run across a problem.
My company uses the AASHTO first harmonic criteria of 3.0 hertz or an alternate weight criteria of W>180e(-0.35f). The customer wants me to explain why the alternate weight criteria can be used, but I do not know where it came from. I have found several mentions of it in varying DOT standards but no document expalaining it.
Does anyone know whre I could find an explanation of the alternate weight spec for harmonic frequency in bridges?
Any help would be greatly appreciated.
My company uses the AASHTO first harmonic criteria of 3.0 hertz or an alternate weight criteria of W>180e(-0.35f). The customer wants me to explain why the alternate weight criteria can be used, but I do not know where it came from. I have found several mentions of it in varying DOT standards but no document expalaining it.
Does anyone know whre I could find an explanation of the alternate weight spec for harmonic frequency in bridges?
Any help would be greatly appreciated.





RE: First Harmonic in Bridge calculations
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RE: First Harmonic in Bridge calculations