×
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

How to Model Equipments on a Platform in SAP2000

How to Model Equipments on a Platform in SAP2000

How to Model Equipments on a Platform in SAP2000

(OP)
Hi,

I'm modelling an LNG platform. The model is pretty straight forward, a concrete deck, supported on steel piles, with nonlinear soil springs.
I need to model the loading arms and other equipments on the deck to look at the seismic behavior of the structural with the additional mass on its deck. How would you guys recommend modelling the top of deck equipment? I'm afraid modelling them similar to piles or other structural members may change the period of my structure. Any thoughts?

Thanks!

RE: How to Model Equipments on a Platform in SAP2000

Hello,
You can buid a fiction element (like a frame but EJ very high) from supporting points to grativity of quipment, then put load at top of fiction element. I offten do this way.
BR
Thanh

RE: How to Model Equipments on a Platform in SAP2000

You could use a rigid "dummy" element as described by Thanh, but a cleaner approach in my opinion would be assign gravity direction joint loads at the equipment center of mass and attached them to points on the deck using joint constraints, probably Body type joint constraints.

Using Define menu Mass Source you can define your mass model from loads. If the assigned loads are assigned in the gravity direction, they will convert to mass in all degrees of freedom, so this is a convenient way to account for mass of equipment and such.

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