Coupled foundation-superstructure analysis and influence of building stiffness on foundation response

Yat Fai Leung, Neil A. Hoult, Assaf Klar, Kenichi Soga

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)

Abstract

This paper proposes a simple method to include superstructure stiffness in foundation analyses. The method involves extracting a small "condensed structural matrix" from finite element models of the superstructure, which can then be incorporated into pile group or piled raft analyses using common approaches such as elastic continuum or load transfer methods. The matrix condensation method directly couples structural and geotechnical analyses, and eliminates the need for iterative analyses between structural and geotechnical engineers. Effectiveness of the approach is illustrated through analyses of several buildings designed with a typical floor plan but with varying heights. The parametric study illustrates that superstructure stiffness can have a significant influence on foundation settlement estimates, and the stiffening effects are dominated by the lower stories of the superstructure. The proposed method aims to bridge the gap between structural and geotechnical analyses. Also, being a computationally simple and accurate approach, it is applicable to parametric or optimization studies that would otherwise involve large amounts of analyses.
Original languageEnglish
Title of host publicationDeep Foundations and Geotechnical In Situ Testing - Proceedings of the 2010 GeoShanghai International Conference
Pages61-66
Number of pages6
Edition205 GSP
DOIs
Publication statusPublished - 6 Sep 2010
Externally publishedYes
Event2010 GeoShanghai International Conference - Deep Foundations and Geotechnical In Situ Testing - Shanghai, China
Duration: 3 Jun 20105 Jun 2010

Conference

Conference2010 GeoShanghai International Conference - Deep Foundations and Geotechnical In Situ Testing
Country/TerritoryChina
CityShanghai
Period3/06/105/06/10

Keywords

  • Coupling
  • Raft foundations
  • Soil-structure interactions
  • Stiffness
  • Superstructures

ASJC Scopus subject areas

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

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