Effect of soil-basement interaction on seismic responses of structures

摘要

In order to investigate the effect of soil-basement interaction on the earthquake response of structure,rncentrifuge tests were performed using an in-flight earthquake simulator. The test specimen was composedrnof a single-degree-of-freedom structure model, a substructure model, and soil deposit in a centrifuge container.rnThe earthquake responses of the fixed and embedded basements depended on those of the massive soil deposit.rnNot only the ground motion but also the inertia force of the basement, which was in the forced vibration by thernmassive soil deposit, amplified the seismic loads of the structures. The seismic loads of the structures on thernhalf-embedded basement were greater than those of the fixed base structures in whole period range. Whenrnthe maximum dynamic earth pressure acted on the front side of the basement during the earthquake, the earthrnpressures on the opposite side of the basement were diminished due to the gap between the soil and the basement.