Influence on Seismic Response Owing to the Variation in Size and Spacing of Building in a Building Cluster

Abstract

AbstractSoil–structure interaction (SSI) effects on both the strong motions transmitted to structures and the structural response to these motions. In cities, buildings are arranged in clusters or groups. However, while designing a building it is assumed to be an isolated structure with fixed base for simpler calculations. The complexities of SSI effect increase many folds by considering neighbouring buildings. The seismic response of a building depends upon the soil–foundation–structure interaction and is effected significantly by the response of adjacent building. The building height, depth and size of foundation, soil properties, etc., affect the seismic response of a building group. Response of a single building is higher as compared to building cluster. However, not all buildings in the cluster are equally affected by the earthquake owing to the difference in position of building within the cluster and also due to the spacing between two adjacent buildings. This study investigated the impact of variation in placement of building in cluster and variation in spacing of buildings on the seismic response of structure by modelling the building and soil bed using finite element approach. It also analyses the time taken for damping of variation in building group in comparison to isolated single buildings.KeywordsSoil-structure interactionBuilding clustersPeak responseFrequenciesDisplacement contour