Simplified Dynamic Analysis of Buildings with Basements

TLDR: In this paper, the effects of basements on the dynamic soil-structure interaction of buildings are investigated and simplified models in which each interaction force is represented by a set of spring and dashpot in parallel are proposed.

Abstract: The effects of basements on the dynamic soil-structure interaction of buildings are investigated and simplified models in which each interaction force is represented by a set of spring and dashpot in parallel are proposed. The frequency independent stiffness and damping coefficients to be used in the simplified models are obtained from transient analyses by comparing the average work done and the average rate of energy dissipated by the interaction forces in a more accurate lumped parameter model and the simplified model. To take into account the inertial resistance of the soil against the basement walls, virtual masses are added to the basement floors to obtain more accurate shear forces acting on the flexible basement columns. Using the proposed simplified models, the influence of the number of basements on the structure-foundation system is investigated.