EFFECT OF FINES CONTENT AND PARTICLE DIAMETER RATIO ON SMALL STRAIN SHEAR MODULUS OF DENSE BINARY GRANULAR MIXTURES

During earthquake waves propagation, soil layers are deformed. The resulting deformation is mainly determined by dynamic parameters, which are described in the terms of small strain shear modulus (Gmax), normalized shear modulus (G / Gmax) and damping ratio (D) (Towhata, 2008). Based on previous research, grain size distribution and particle shape have significant effect on small strain shear modulus (Ishihara, 1996; Santamarina & Cho, 2004; Wichtmann & Triantafyllidis, 2009). While the effect of soil fabricon dynamic parameters of uniform mixtures has been well investigated, there is still a gap in knowledge around the behavior of soil mixtures. According to the literature, recent investigations on binary granular mixtures- as the simplest mixtures- demonstrate that fines content and particle diameter ratio have great impact on small strain shear modulus (Liu & Yang, 2018). The aim of this research is to figure out the effect of fines content and particle diameter ratio on small strain shear modulus in dense binary granular mixtures.

Keywords:

Small strain shear modulus , Binary granular mixtures , Fines content , Particle diameter ratio , Resonant column