What are the experimental/numerical procedure to determine the natural frequency of a shallow foundation system? what are the ranges for foundation resting on granular soil?
Faire des mesures avec une station de mesure H/V (bruit ambiant) (sismographe+ station) sur des ouvrages présentants les même caractéristiques que votre modèle
The reliable procedure is to carryout the block vibration test to determine the natural frequency of the soil. The natural frequency varies for different type of soil. Generally for granular soil, it varies between 25 to 50 Hz.