shear force in concrete walls due to dead load?

[radiocontrolhead]

I'm finding a significant amount of gravity load being transferred into my shear walls in the form of in plane shear. Is this normal?

I have my slab modeled and am applying stiffness modifiers to it. The configuration isn't something i would expect for this to occur. Is this strange?

 

[radiocontrolhead]

doing a little more digging, research, and experimentation it appears that these walls are acting as deep beams after a good look at the boundary conditions (how the ends of the walls are supported and the internal shears associated with deep beam behavior is being reported.

Question then is: should these in plane shears be ignored when it comes to designing to wall for lateral shear and then justify the design of the shear wall design as a deep beam for gravity loads (Design based on strut and tie model)

Thank you

 

[Trenno]

Whats your mesh size?

When you've got the assign wall mesh dialogue open, are you ticking the option that goes something along the lines of "add restraints on edges"?

 

[radiocontrolhead]

Maximum mesh size is about 5 feet. I have attached a screenshot to show scale of mesh relative to wall. Wall is several stories tall (3 below, 2 above).

The option is ticked on to "add restraints on edges"

 

[Trenno]

Maybe the wall is spanning between the returns for some reason?

See if the reactions are at every analysis node of the auto-mesh?