Evaluation of Settlement and Seismic Response of High-Rise Buildings Considering Soil–Structure Interaction Based on Static Loading Results and Continuum Modeling

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Document Type : Research Article

Authors

1 Assistant Professor, Department of Civil Engineering, Shahrood university of Technology

2 Shahrood University of Technology

3 Assistant Professor Department, of Civil Engineering Shahroud University of Technology

Abstract

High-rise buildings have always been important subjects for researchers and structural designers. While seismic analysis of these structures is critical in engineering, the effects of soil-structure interaction often receive less attention. However, considering soil-structure interaction in seismic analyses provides more accurate and realistic estimates of structural performance during earthquakes. This study investigates the impact of soil-structure interaction on the seismic behavior of high-rise buildings with mat and pile (deep) foundations. The main goal is to evaluate foundation settlement considering soil-structure interaction and compare it with the fixed-base condition, which ignores soil effects. A 33-story high-rise building with a core frame structural system was modeled, analyzed, and designed using ETABS software. For a more precise analysis of the soil-structure-pile-mat interaction, the continuum soil modeling software MIDAS GTS NX was used to calculate foundation settlement under continuum conditions. Comparing these results with those using the Winkler spring model in non-continuum software shows that foundation settlement considering soil-structure interaction is greater than that predicted by the Winkler model. Furthermore, accounting for soil effects reduces foundation settlement compared to the fixed-base condition. Additionally, including soil effects in seismic analysis increases inter-story displacement. These findings emphasize the critical importance of incorporating soil-structure interaction in the analysis and design of high-rise buildings.

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Amirkabir Journal of Civil Engineering

Articles in Press, Accepted Manuscript
Available Online from 02 October 2025

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