sap2000 area null

[zanetto]

I have a problem using area null
I draw a frame with hinges at the end of frames
I use area null and uniform to frame for slab load
Sap draw wrong bendng moments because they are not 0 at hinges

Thank you
I apologize for my English

 

[JasonMcKee71]

Does it work when removing the area object?

Jason McKee
proud R&D Manager of
Cross Section Analysis & Design
Software for the structural design of cross sections
Moment Curvature Analysis
Interaction Diagrams
Reifnorcement Design etc.

 

[zanetto]

If I assign distributed loads to frames there is no problems

 

[mronlinetutor]

I don't use sap2000. I use midas gen. but a quick search on google gets the following:

A null area is an area object which is assigned the None property such that it may be excluded from analysis, but used to apply area loads of type Uniform to Frame (Shell). This will ensure that loading transfers without the object contributing to structural stiffness. Check that auto-meshing is not assigned to these area objects, otherwise numerical problems may result.

did u use manual meshing instead of auto-meshing?


disclaimer: all calculations and comments must be checked by senior engineers before they are taken to be good.

 

[zanetto]

I use no mesh