Seismic interaction of tall building and underground level

Abstract

High-rise buildings are typically built in dense urban environment in cities. These tall buildings are built over underground spaces (basements) that are used for parking. The seismic response of a tall building with large underground structure can be influenced by the soil structure interaction (SSI) due to kinematic and inertial effects. Building codes recommends to only account for the kinematic interaction using substructure modeling approach and ignore the inertial interaction. This study evaluates the numerical accuracy of the substructure modeling procedures for a tall building built on shallow bedrock by comparing with the complete model. It is demonstrated that the inertial interaction further reduces the seismic response of the tall building and that considering only the kinematic interaction results in a conservative estimate of the building response. Copyright ? Soil Mechanics and Geotechnical Engineering, ARC 2019.All rights reserved.