Abstract

This study presents a comparative analysis of a 15-story building with two foundational approaches: a fixed- base foundation and a pile foundation incorporating soil- structure interaction (SSI) in sandy soil conditions. The research investigates the dynamic behavior of each foundation type under varying conditions, specifically examining the effects of different pile spacings and relative densities of sandy soil on the building’s fundamental frequency, time period, lateral displacement, and overall structural stability. The SAP2000 software is used for numerical study. Key Words: Soil-Structure Interaction (SSI), frequency, time period, displacement, Lateral Displacement, Seismic Analysis, G+14, SAP2000, sandy soil

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