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Dynamic interaction analysis of adjacent high-rise structure systems on deep soft sites.

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Title: Dynamic interaction analysis of adjacent high-rise structure systems on deep soft sites.
Authors: Chen, Shuping1 chenshuping@nuc.edu.cn, Wu, Jinwen1 12303434@qq.com
Source: Journal of Vibroengineering. May2026, Vol. 28 Issue 3, p690-704. 15p.
Subjects: Soil-structure interaction, Seismic response, Tall buildings, Soil compaction, Settlement of structures, Finite element method
Abstract: The dynamic interaction of adjacent high-rise structures on deep soft soils was systematically investigated using advanced three-dimensional finite element modeling. Parametric analyses considered varying building spacings (10-40 m), foundation types, and soil stiffness values. Compared with isolated soil-structure interaction (SSI), the structure-soilstructure interaction (SSSI/DCI) scenario increased peak interstory drift ratios by up to 38 % and amplified maximum foundation displacement by 25 % for the closest building pairs. Dynamic coupling also resulted in a reduction of fundamental natural frequencies by as much as 15 %. The influence of soil flexibility was found to be critical; structures on softer soils experienced stronger interaction and greater seismic response amplification. The findings provide quantitative evidence and practical guidance for the seismic design of high-rise clusters in urban environments with deep soft ground. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:The dynamic interaction of adjacent high-rise structures on deep soft soils was systematically investigated using advanced three-dimensional finite element modeling. Parametric analyses considered varying building spacings (10-40 m), foundation types, and soil stiffness values. Compared with isolated soil-structure interaction (SSI), the structure-soilstructure interaction (SSSI/DCI) scenario increased peak interstory drift ratios by up to 38 % and amplified maximum foundation displacement by 25 % for the closest building pairs. Dynamic coupling also resulted in a reduction of fundamental natural frequencies by as much as 15 %. The influence of soil flexibility was found to be critical; structures on softer soils experienced stronger interaction and greater seismic response amplification. The findings provide quantitative evidence and practical guidance for the seismic design of high-rise clusters in urban environments with deep soft ground. [ABSTRACT FROM AUTHOR]
ISSN:13928716
DOI:10.21595/jve.2025.25170