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How long is it to design composite steel box bridge(preliminary)?

How long is it to design composite steel box bridge(preliminary)?

How long is it to design composite steel box bridge(preliminary)?

(OP)
Span : 60 + 80(m)
 Width : 2Lane + 1 foot
 
 Things to do : 1. Demensioning steel thickness.
                2. Calculating Steel Quantity.

  

RE: How long is it to design composite steel box bridge(preliminary)?

1 day or less if you have the right software.

RE: How long is it to design composite steel box bridge(preliminary)?

And a very, very long time if you've never done it before.

Hg

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RE: How long is it to design composite steel box bridge(preliminary)?

TBD - I would add that you must know what you're looking for in the software results to ensure the preliminary is conservative and can be refined.  

No one likes to have increases in steel quantities especially now that steel prices are through the roof.

 

Regards,
Qshake
pipe
Eng-Tips Forums:Real Solutions for Real Problems Really Quick.
 

RE: How long is it to design composite steel box bridge(preliminary)?

Qshake-

It certainly helps when you know of bridges with similar spans and widths.  Having that information in hand along with experience in doing this several times makes this exercise fairly easy.  For preliminary analysis, we've typically added 10% of the box girder weight to account for steel details.
 

RE: How long is it to design composite steel box bridge(preliminary)?

A variable unstated is depth of box girder.  The deeper, the less flange steel required.  Use L/30 for first analysis.

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