I have a layer of EPS Geofoam below the ground surface. I want to study the influence of dynamic loads on Geofoam. Can I simplify this Geofoam layer as Bernoulli's beam or Timoshenko beam having linear elastic behavior?
Im not into geotecnique, but maybe the theory used for heavy floating floors on EPS or softened EPS may be used? The load-deflection curve of EPS follows a characteristic curve with a linear section in the early midrange of the compression Until it gives in and the curve flattens like a slowly increasing plateu. Limited amplitude dynamics under loads in that region may be linear. Then the mass and the EPS can simply be modeled as a mass and spring with a dashpot damping component like for a floating floor. There will be resonance and insulation above 1,4 times the resonance frequency.
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