×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Interpretation of LRFD Bridge Design Spec

Interpretation of LRFD Bridge Design Spec

Interpretation of LRFD Bridge Design Spec

(OP)
I'm looking for other's opinion on how to interpret Section 5.7.4.2 regarding the use of a reduced effective area for design in Seismic Zone 1. The code requires the percentage of steel in the reduced effective area to be the greater of either 1% or the value obtained from the following equation:

As/Ag >= 0.135f'c/fy ( I wrote it without prestressing)

I don't feel like the code clearly states whether the equation is suppose to be calculated for the gross area, Ag, of the actual gross area or the reduced effect gross area. Based on the commentary, I feel like it's the latter which agrees with a design memo released by Iowa's DOT however, I cannot find a position from any other agency to back that up. I hate to rely on just source.

Does anyone know of a way that I could submit this for response from AASHTO directly? I feel like it's something that should be clarified in a later version of the spec.



Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

White Paper - Considerations for choosing a 3D printing technology
The adoption of 3D printing into major companies’ product development life cycles is a testament to the technology’s incredible benefits to consumers, designers, engineers and manufacturers. While traditional production methods have limitations in manufacturability, 3D printing provides unparalleled design freedom due to the additive method of building parts layer by layer. Download Now
White Paper - Are all 3D printed metals the same?
With so many different 3D printing metal systems and processes today, how can you know exactly what you’re getting? Today, there are several different methods for manufacturing 3D printed metal components with their own strengths and limits. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close