Moment releases continuous vs pinned 3

Eradul · Nov 22, 2022

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]

JLNJ · Nov 22, 2022

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.

kjm93 · Nov 22, 2022

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

JoshPlumSE · Nov 22, 2022

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

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Moment releases continuous vs pinned 3

Eradul

Structural

Recommended for you

JLNJ

Structural

kjm93

Structural

JoshPlumSE

Structural

Similar threads

Part and Inventory Search

Sponsor