1 Dynamic soil properties of Brahmaputra sand using Cyclic Triaxial tests

Determination of dynamic soil properties is an utmost critical and important aspect of geotechnical earthquake engineering problems. Basically, the damage due to dynamic loading (e.g. earthquake strong motions) is substantially influenced by the response of soil deposits which is governed by the dynamic soil properties. This paper reports a study on the determination of shear modulus and damping ratio of Brahmaputra sand under varying confining pressures, loading frequencies and shear strain levels using strain controlled undrained Cyclic Triaxial test records. It has been observed that for a particular confining pressure, the dynamic response of the soil substantially varies beyond a specific shear strain and loading frequency