Base shear thru friction only?

[lrhg]

Is it ever OK to rely ONLY on friction to resist base shear?
Specifically - precast load bearing wall panels providing the lateral force resisting system where the base shear is taken out in friction on plactic bearing strips? By my interpretation, ACI 16.5.1.4 says no.

 

[youngstructural]

Code or no code, this is not a responsible design procedure. Concrete shrinks, earthquakes contain vertical components as well as horizontal, uplift in high winds can be notoriously unpredictable and people are an unknown factor that can cause litterally anything to happen.

Always, but always provide some steel to anchor your panel. Even if friction is sufficient by analysis, I would never specify a panel that didn't have at least nominal bars (say low grade 10mm dia at 600 crs) to the foundation.

All that aside, you'll have to wait for someone who applied the US codes to comment on your point regarding "16.5.1.4".

Cheers,

YS

B.Eng (Carleton)
Working in New Zealand, thinking of my snow covered home...

 

[NS4U]

This could be considered a shear friction problem in which case by 11.7.4 you would need the required uplift steel

 

[spats]

They specifically say "NO". If you at least dowel into the floor slab, you're fine.