Ground Compliance を考慮した構造物の地震応答(第4報)

Abstract

In this study, the dynamical characteristics of the ground is simulated to a transfer function, expressed by a rational function, which approximates the dynamical ground compliance of arectangular foundation on an elastic half-space. An above-ground structure is idealized as aone-degree-of-freedom system, the restoring characteristics of which are supposed to be a bilinearhysteretic type. As the adjacent soil-ground to the foundation may behave inelastically duringstrong earthquake, the elasto-plastic boundary layer is placed between the above-ground structureand the elastic ground. A set of band-limited white noise which has a finite duration time is usedas the earthquake excitation. An effect of ground-structure interaction on the average of themaximum relative displacement responses for the excitation ensemble is discussed.