Contact US

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!

*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

Moment releases continuous vs pinned

Moment releases continuous vs pinned

Moment releases continuous vs pinned

Hi !

I have done simple truss analysis in SAP2000 while mistakenly providing moment releases of members as continuous instead pinned while I'm drawing the truss. However, later I changed the releases by Assign>Frame>Releases/Partial fixity>ticked all releases except axial load. However, still, I'm receiving bending moments for the members. Can anyone tell me the reason? glasses

RE: Moment releases continuous vs pinned

If they are in fact all modeled as pinned, you would need some kind of load along the member not at a node. I uniform load on the top chord or member self-weight will cause this effect. Sloppy un-merged modeling where the members are not quite aligned at the nodes will also cause member moment.

RE: Moment releases continuous vs pinned

The model attached does not have the members modelled as pinned. Select all of the members and release moments at either end.

RE: Moment releases continuous vs pinned

I agree with kjm93, that model does not have any member end releases assigned to the truss elements.

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


Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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