An evaluation of the effect of matric suction on the dynamic strain-dependent parameters of an unsaturated silt

This research investigates the influence of matric suction on variation shear modulus and damping ratio a silty soil in very small to medium strain levels. A set laboratory experiments including three bender elements tests addition resonant column-torsional have been carried out unsaturated Firuzkuh silt specimens. In this regard, an triaxial cell equipped with device that can apply control used. All specimens had initial void 0.7 were tested various suctions under net mean stress 50 kPa. For purpose, axis translation technique has implemented for applying suction, High Air Entry Value (HAEV) ceramic discs used air-water According results, significant observed changes level. The output data indicate increases increasing while decreases increase suction. addition, decrease strain, respectively.