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<p>Urban development has led to increasingly dense construction where buildings of varying heights interact through underlying soil, making structure-soil-structure interaction (SSSI) a critical consideration in seismic design. While conventional analysis often focuses on isolated structures, the complex interaction between adjacent buildings through soil media can significantly affect structural behavior. This paper investigates the SSSI effects on the footing settlements of a three-story building adjacent to structures of varying heights using three-dimensional finite element modeling. The results reveal that the height of the adjacent building considerably affect the settlement of the footings, with taller adjacent buildings having a more pronounced influence. The analysis reveals significant variations in vertical settlement patterns when comparing SSSI to SSI analyses: buildings of comparable height show variations from 0.95 to 1.26 times, shorter adjacent structures yield ratios between 1.05 and 1.22 times, while taller neighboring buildings produce the most substantial effects, ranging from 0.99 to 1.45 times the SSI values. Notably, vertical settlements increase, particularly for footings closest to the adjacent structure are observed.</p>

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Numerical Analysis of Structure-Soil-Structure Interaction Between Buildings with Varying Heights

  • 期刊论文

  • 发表日期：

    2026年1月21日

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  • Shrish Chandrawanshi,
  • Vivek Garg

摘要

Urban development has led to increasingly dense construction where buildings of varying heights interact through underlying soil, making structure-soil-structure interaction (SSSI) a critical consideration in seismic design. While conventional analysis often focuses on isolated structures, the complex interaction between adjacent buildings through soil media can significantly affect structural behavior. This paper investigates the SSSI effects on the footing settlements of a three-story building adjacent to structures of varying heights using three-dimensional finite element modeling. The results reveal that the height of the adjacent building considerably affect the settlement of the footings, with taller adjacent buildings having a more pronounced influence. The analysis reveals significant variations in vertical settlement patterns when comparing SSSI to SSI analyses: buildings of comparable height show variations from 0.95 to 1.26 times, shorter adjacent structures yield ratios between 1.05 and 1.22 times, while taller neighboring buildings produce the most substantial effects, ranging from 0.99 to 1.45 times the SSI values. Notably, vertical settlements increase, particularly for footings closest to the adjacent structure are observed.