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Seismic Torsional Eccentricity Modelling in Spacegass

thread507-461206

Seismic Torsional Eccentricity Modelling in Spacegass

Seismic Torsional Eccentricity Modelling in Spacegass

(OP)
Hi,

Has anyone had experience on how to model the torsional eccentricity using Spacegass?
I'm analyzing a 9 stories concrete structures with core, columns and flat slab in PNG, where seismic is quite dominant.

Spacegass is quite good for analysis, however I have not used it for seismic analysis and their manual indicate that their dynamic & spectral analysis do not consider the additional accidental eccentricity (torsional eccentricity).

Please advise and thank you

Regards,
Eric

RE: Seismic Torsional Eccentricity Modelling in Spacegass

Call the program developer, or go to the distributor's website. This question should be adequately addressed in the Q & As.

RE: Seismic Torsional Eccentricity Modelling in Spacegass

Try to add a diaphragm load at each floor providing eccentricity 5% - 10%

RE: Seismic Torsional Eccentricity Modelling in Spacegass

(OP)
Hi henadubaieng,

Have you done this yourself?
Could you please advise how to do it?

Cheers,
Eric

RE: Seismic Torsional Eccentricity Modelling in Spacegass

Add a constraint to the diaphragm (master/slave) then it will act as a rigid body. Apply your eccentric load to a dummy node in the right location.

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