Effect of Structure, Soil, and Ground Motion Parameters on Structure-Soil-Structure Interaction of Large Scale Nuclear Structures

摘要

Structure-Soil-Structure Interaction (SSSI) is defined as the effect that a neighboring structure has on the dynamic response of a given structure on a common soil site. The significance of SSSI is sensitive to the characteristics of the soil, structures, and ground motion, as well as the spatial distance between structures. The Hanford Site, a Department of Energy Facility, contains a complex of structures that exhibit significant SSSI behavior. The SSSI effect is measured in this paper by considering two models, one including the entire complex of structures and one including only the structure that exhibits the most critical SSSI response. The amplification is quanitifed through a comparison of transfer functions and seismic member demand accelerations. A realistic study of the sensitivity of soil parameters is accomplished by replacing the Hanford Site soil parameters with those of the Savannah River Site (SRS). SRS is also a Department of Energy Facility. As this Site is located in the state of South Carolina, the soil stiffness is less rigid and provides for a practical comparison. The sensitivity of the soil stiffness is quantified by taking a ratio of the response of the combined model to the response of the individual model for both soil types.