Effects of Soil–Structure Interaction on Seismic Response of a Six-Story Building under Different Shear Wave Velocities

Abstract

The objective of this research is to analyze the variation in the seismic response of a six-story building with a shallow foundation by comparing a rigid base model with models that incorporate soil-structure interaction effects for different shear wave velocities in the soil. This work presents a quantitative approach with a descriptive-explanatory scope and a non-experimental, comparative-descriptive, ex post facto design. The sample is a six-story building with a shallow foundation, selected non-probabilistically for convenience. Data collection techniques included document analysis, analysis of specialized regulations, architectural and structural plans, soil mechanics studies, and the application of a basic mathematical model. Data processing was performed using Excel, ETABS V21.2, and Mathcad. The results showed a significant increase in drifts, displacements, and vibration periods. Furthermore, it was found that shear forces and moments at the base decrease as the shear wave velocity decreases. Finally, it was determined that soil-structure interaction generates variations in the seismic response of a six-story building with a shallow foundation subjected to different shear wave velocities. The variables of drift, displacement, and periods are primarily affected, showing a considerable increase, while internal forces decrease, compared to the fixed-base model.