Response of Shallow Foundation Under Coupled Cyclic Loading For Unsaturated Sand at Large Number of Cycles

抄録

The deformation of the unsaturated granular material under the action of large number of cycles can be interpreted by several ways. The various changes on the soil properties by the application of the cyclic loading creates an unique response to the applied external forces. A change in any one of the several properties of the soil will create a response which will be different from the responses created by altering other properties. One of the parameter influencing the soil response under the application of cyclic load is soil suction. For development of the realistic coupled model which takes the account of different nonlinear behavior coupled intrinsically in the model, needs a general experimental overview beforehand the model development process is undertaken. In this regard, this study is performed for the response of the rigid footing coupled by the multidimensional nonlinearity in the domain of the unsaturated soil and the angular loading. The coupled phenomenon is furthermore studied in detail by performing the experiment in one domain by keeping the parameters in the other domain constant. The evolution of the displacement in each cycle which leads to the unique accumulated cyclic strain in the system is studied for the unsaturated domain at a constant angle. The comparative study of the accumulation behavior of plastic strain within the imposed cycle for the saturated, dry and two unsaturated condition of Hostun sand is performed and presented.