×
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

Column reactions from PT beam

Column reactions from PT beam

Column reactions from PT beam

(OP)
Would there be a different between the column reactions from a continous RC beam and continous PT beam?

RE: Column reactions from PT beam

oranda,

Yes, most continuous PT structures induce secondary (hyperstatic) reactions due the prestressing and the fact that the structure is indeterminate.

The magnitude of the secondary moments and the reactions due to prestress depend on the profiles of the prestressing tendons.

If no reactions and hence so secondary moments nor secondary shears are induced, then the tendon profile is called "concordant". Old bridge designers of yesteryear used to design PT bridges with concordant tendons.

Today secondary actions are designed with a load factor of 1.0 in limit state strength design, and the effects must be taken into account.

You can argue that if your continuous PT beam is ductile, at the strength limit state that there will be a lot of moment redistribution/cracking and the secondary actions will be reduced.

HTH

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