This apparatus is used in soil seismic response spectra, basic period, impedance ratio, shear modulus, damping, conversion function and interaction between soil and structure against seismic loads. In this apparatus amplitude of oscillation & acceleration in Accelerogram apply to sample by control system & hydraulic jack. Embedded various sensors in apparatus such as accelerometer, LVDT, Extensiometer, piezometer (barometer) the possibility of dynamic parameters and seismic soil-structure system provided. This is produced in two different sizes that the differences are in dimensions, shear force and amplitude of oscillation.

The most highlighted features of this apparatus are as follow:

•  Evaluation of soil responses spectra and foundation to mechanical waves particularly bed shear wave
•  Evaluation of seismic moods in modeled structure in apparatus scale
•  Study of interaction between soil and structure
•  Basic periods & other seismic moods measurement
•  Appling specific accelerogram by using displacement/acceleration control method
•  Determination of shear modulus, damping and impedance ratio in intersection between soil layers and rigid bedrock