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Extreme Torsional Irregularity

Extreme Torsional Irregularity

Extreme Torsional Irregularity

(OP)
Hello All,

Can I neglect extreme torsional irregularity if my overall building sway in the model is in withing prescribed limits? The building has masonry shear walls. Due to arch constraints, I am unable to move the center of rigidity of the building to keep the torsion in control. Any input would be really appreciated.

Thanks,

RS

RE: Extreme Torsional Irregularity

I think that you're stuck with the irregularity regardless of the drift level: Link

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: Extreme Torsional Irregularity

Adjust the center or rigidity by adding expansion joints in the masonry walls at strategic locations and/or disconnecting some of the wall segments from the diaphragm.

RE: Extreme Torsional Irregularity

As KootK's link says, in some seismic situations, and in accordance with some design codes, extreme torsional irregularity is forbidden. In that case, the architect would have to rethink.

RE: Extreme Torsional Irregularity

(OP)
Thank you all for your input.

RS

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