topic AASHTO LRFD FORMULA in Structural Bridge Design Forum

AASHTO LRFD FORMULA

Anonymous — Tue, 14 Nov 2017 07:44:05 GMT

Hi, Everyone.
I want to ask about this formula on AASHTO ASBD Calculation Report.

Where can I find it? It's Different from the code.
Thank you.

ASBD Beam Module Report (AASHTO LRFD 7th Edition)

Re: AASHTO LRFD FORMULA

Philip.Lee — Tue, 14 Nov 2017 09:34:09 GMT

Are you using SI or Customary US units?

Re: AASHTO LRFD FORMULA

Anonymous — Tue, 14 Nov 2017 09:59:36 GMT

Hi Lee,

I'm using customary US units.
Actually I've tried both and resulted the same formula.

Re: AASHTO LRFD FORMULA

Philip.Lee — Tue, 14 Nov 2017 10:02:41 GMT

Please will you zip up your data file and attach it to the forum so I can run it here.

Re: AASHTO LRFD FORMULA

Anonymous — Tue, 14 Nov 2017 10:10:24 GMT

Hi Lee,
Please see attached file.

thanks

Re: AASHTO LRFD FORMULA

Philip.Lee — Tue, 14 Nov 2017 10:25:00 GMT

The 2015 and 2016 Interim Revisions made significant changes to the LRFD 7 design calculations. These were included in the ASBD 2017 update which you are using.

The formula you posted was revised in the 2015 Interim Revisions to LRFD 7. The revised formula is shown below:

If this answers your question, please use the green Accept as solution button to say so. This allows other users to find solutions faster.

Re: AASHTO LRFD FORMULA

Anonymous — Tue, 14 Nov 2017 11:00:19 GMT

Thanks Lee.