Measurement of material damping with bender elements in triaxial cellMeasurement of material damping with bender elements in triaxial cell
Deformation characteristics of geomaterials
3rd International Symposium on Deformation Characteristics of, Geomaterials, SEP , 2003, LYON, FRANCE
(2003), p. 3-11
University of Antwerp
This paper presents a method to measure the viscous damping ratio of soils in isotropic stress conditions using a triaxial cell equipped with piezoceramic bender elements. The technique is based on the determination of a frequency response spectrum of the soil specimen by means of a continuous sine excitation generated by the emitter element. System identification procedures, known from modal testing, are applied for the interpretation of the spectra. Analytical expressions are found and a finite element model is developed to encircle the region of the resonant frequency. The test is performed on a reconstituted and undisturbed silt sample.