Soil-in seismic calculation

Definition, application

Soil-in is an iterative cycle described in chapter "Soil-in calculation" .It is possible to combine it with calculation of seismic load cases (spectral analysis).

Definition, application

For spectral analysis with soil-in support on structure it is necessary to define surface support type soilin and define Load case with action type variable and load type dynamic with specification Seismicity. See "Seismic Analysis of Buildings".

In Solver setup it is necessary to define Soil combination, Maximum soil interaction iterations and Number of eigenmodes for spectral analysis. See "Required parameters for Soil-in calculation".

Where to find in Scia Engineer

How to run calculation

This type of calculation is run as Linear analysis.

Calculation background

The schema of Linear analysis with seismic load cases and soil-in is:

Advantage of this solution is, that soil-in calculation is performed before modal analysis, so soil-in influences eigen frequencies of structure for spectral analysis.