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


SAP2000 External Tendons

SAP2000 External Tendons

SAP2000 External Tendons


I am trying to model a tendon/timber hybrid truss system on SAP2000. I am having difficulties modelling an external post-tensioned tendon that is draped along the bottom of the truss chord and then diagonally up and anchored at the top of the column. It is not directly connected to the bottom chord, rather, deviator blocks are installed on the underside of the chord and the tendon runs along the blocking.

My problem is modelling the blocking such that I can model the tendon without having to connect the tendon to a joint within the truss system.

Thank you

RE: SAP2000 External Tendons

Henry 94

SAP2000 tendon is for pre-stressed concrete. It will probably not work around any other element. Here is what I would do:

1)Model the truss and the tendon as frame members making sure the eccentricity of the tendon w.r.t the bottom chord is well modelled.
2)You will have to discretize the tendon and use rigid elements to connect the tendon to the bottom reinforcement. I think this is what you mean by deviator points.
3)Apply initial strain to the tendon. This strain is the strain corresponding to the effective prestress (i.e after losses)

Some friends suggest using ANSYS prestress capabilities. However, SAP2000 might just do the job if you work carefully and test your model with some known results.

You did not say whether your analysis is linear or inelastic. But the model is the same either way.


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!


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