Increase the stiffness of the point supports (piles) in the 3D model for the seismic analysis.

SOFiSTiK
1

Hello,
this is my first time on the forum. I have been working with SOFiSTiK for 10 years.

I am working on a 3D model of a 20-storey building founded on piles. In the model, point supports with defined stiffness are assigned below the foundation slab.

How can I increase the stiffness of point supports (piles) in the Earthquake-RSA module in SOFiSTiK 2025 or 2026?
In older versions, I did this using the command FACB.

Thanks!

2

If you evaluate eigenvalues still with ASE (instead of DYNA or FEABENCH) you can define with
GRP… FACS…
the stiffness of a whole group.
With
GRP… FACB…
you can define only bedding of slabs/areas or lines/piles.

You can also define in ASE
ELEM ETYP SPRI NO… FACS
With this input you can modifiy the stiffness of one or more single elements.