Comparative Study of Dynamic Shear Modulus through Laboratory Experiments

AbstrcatThe results of soil dynamic analysis are different because of the difference of soil dynamic parameters. To get reliable soil dynamic characters of large-scale model tests of dynamic soil-foundation-structure interaction system, cyclic simple shear tests of undisturbed samples and dynamic triaxial tests of compact specimens were performed under 100 kPa,200 kPa and 300 kPa consolidation pressures, and the maximal dynamic shear modulus G_(dmax) and the curves of G/G_(dmax)-γ were obtained and analyzed comparatively. Results showed that the maximal dynamic shear modulus G_(dmax) obtained from cyclic simple shear tests was less than that from dynamic triaxial tests;and the dynamic shear modulus ratio G/G_(dmax) obtained from cyclic simple shear tests was more than that from dynamic triaxial tests under 100 kPa and 200 kPa consolidation pressures, but the G/G_(dmax) obtained from cyclic simple shear tests was less than that from dynamic triaxial tests under 300 kPa consolidation pressure.