Dynamic Analysis for Foundation of Vibrating Equipments Considering Soil-Structure Interaction

The dynamic analysis and design for a large pump foundation are investigated with different design options. The nonlinearity of soil is considered approximately using the boundary zone model with non-reflective interface. The impedances (stiffness and damping) and the dynamic response of foundation are generated from a computer program DYNAN. The amplitudes calculated might be larger than the allowable vibration limit, if the design of foundation is not reasonable. Three options of the foundation design are considered: shallow block foundation, deep block foundation, and cast-in-place concrete piled foundation. The stiffness and damping of foundation, dynamic response, and construction cost are compared with the different types of foundation. The ground water is very shallow in the construction site, and the level of water even closes to the surface. The effects of groundwater on dynamic response of foundation are discussed.