×
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

prestress/jacking force

prestress/jacking force

prestress/jacking force

(OP)
I have a tiechord(steel plate built-up section) in my bridge which take about 2000kips jacking force before the bridge deck in place. How can I model this force in sap2000?

RE: prestress/jacking force

That is a tough issue bluefish

But try to assign a P-delta force to your tiechord frame element. It is the simplest method and it allows you to run an elastic analysis.

P-delta force is not associated with any load case. It is there in the member throughout. So use it with care because it will be there even when you assign other loads.

If it works fine, that will be great. Else, you will have to do nasty nonlinear analysis

respects
ijr

RE: prestress/jacking force

(OP)
thanks for the tip, what if I use the command assign>frame load> strain, and use strain=force/Area of tiechord. Does that do the same job?

RE: prestress/jacking force

That(the strain loading) is very tempting bluefish.

I tried it a couple of times and I didnt like the result. there is something there that I apparently miss.

But try it, if it works then you are rolling

respects
ijr

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!


Resources