Centrifuge modeling and analysis of soil structure interaction under biaxial dynamic excitations

Omar El Shafee, Tarek Abdoun, Mourad Zeghal

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The paper presents a centrifuge test of a level site consisting of granular soil deposits and an embedded structure subjected to various bi-axial base excitations. The test was conducted at RPI NEES centrifuge facility to assess the dynamic response characteristics of soil-structure interaction (SSI) under multidimensional conditions. Synthetic sinusoidal waves were used as base excitations to test dense model under biaxial shaking. A dense array of accelerometers was used to monitor the deposit response (beneath and outside of the structure, along with pore water pressure transducers. The observed acceleration and pore pressure are used along with non-parametric identification procedures to estimate the corresponding dynamic shear stress-strain histories. The measured results along with the obtained histories are used for two purposes. First, to shed light on the mechanisms of soil-structure interaction under biaxial shaking. Secondly, to show the difference in soil behavior at different locations beneath the footing when subjected to biaxial shaking. The later objective is evident when comparing soil stress-strain loops and dilation behavior at locations beneath the structure, and those measured in the free field.

Original languageEnglish (US)
Title of host publicationGeotechnical Special Publication
EditorsThomas L. Brandon, Richard J. Valentine
PublisherAmerican Society of Civil Engineers (ASCE)
Number of pages11
EditionGSP 281
ISBN (Electronic)9780784480489
StatePublished - 2017
EventGeotechnical Frontiers 2017 - Orlando, United States
Duration: Mar 12 2017Mar 15 2017

Publication series

NameGeotechnical Special Publication
NumberGSP 281
ISSN (Print)0895-0563


OtherGeotechnical Frontiers 2017
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology


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