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

Single Span Bridge Zone 1

Single Span Bridge Zone 1

Single Span Bridge Zone 1

I am evaluating loads submitted by another firm for a single span bridge in seismic zone 1 (or seismic zone A). I am a little confused by the minimum connection design forces in the specification. AASHTO LRFD Section states that all single span bridges regardless of zone must be designed for a connection force of As (=Fpga*PGA) x tributary permanent load. The next section ( then states for bridges in zone 1 that the minimum connection force equal 0.25 x the tributary permanent load (for As>0.05).

My question is which section supersedes the other? In my case the zone one requirements are substantially greater so I assumed they governed but the calulation I am reviewing is using the other criteria for single span bridges.

RE: Single Span Bridge Zone 1

For the single span bridge, you should use

Eng-Tips Forums:Real Solutions for Real Problems Really Quick.

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


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