Shear Wall

[flexrule]

Hello,

Attached is the south and west elevation of a RC frame building. The ground elevation on
the south side rises 1.5 ft below the first-floor level. To retain this soil load I tried
to design the Ground floor wall as 9" Shear Wall (although a Shear wall is not required if the building is only considered).

The problem is, considering the shear wall in analysis, my building becomes stiffer
towards the south side and becomes highly eccentric leading to high torsion.
To mitigate this I was planning to design a normal RC wall without connecting it with
the side column and resting only on tie beam in the foundation.
So that I don't need to consider it in the analysis of the building as a whole. Is this a good idea?
If you have any other solution please let me know.

 

[HTURKAK]

RC wall without connecting it with
the side column and resting only on tie beam in the foundation[/b].
So that I don't need to consider it in the analysis of the building as a whole. Is this a good idea?]

IMO, it is not a good idea.. at least the subject wall shall not be connected not only to side columns but the top beam/slab also..That is , the RC wall shall be fully cantilever..

I will suggest two options ; either provide a set back and separate retaining wall or add some RC walls at GF level at opposite sides of subject walls to reduce the eccentricity..

Pls post the structural floor plan of 1st storey and give some info for seismicity, SDC ,..to get better responds..