In this paper, dynamic properties of fiber reinforced soils were investigated at shearing strains between 10-4% and 10-1% using resonant column test. Resonant column test has been widely used as a primary laboratory testing technique in investigating dynamic soil properties expressed in term of shear modulus and material damping. At strains above elastic threshold, the variations of shear modulus(G) and damping ratio(D) were investigated. Based on test results, the small strain shear modulus(Gmax) and damping ratio(Dmin) were determined and the effects of confinement on Gmax and Dmin were characterized.
