Behavior of Nonidentical Differently Loaded Interfering Rough Footings

Christoph Schmüdderich*, Arash Alimardani Lavasan, Franz Tschuchnigg, Torsten Wichtmann

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


In geotechnical engineering, interference effects caused by the construction of closely spaced footings have a significant influence on the system behavior of each individual footing. As the mutual impact of two footings constructed in close proximity has only
been analyzed for identical footings, our aim with this paper is to investigate the interfering effects of closely spaced nonidentical rough
footings considering variations of stresses applied to both footings. Therefore, lower and upper bound simulations have been carried out
using the finite-element limit analysis (FELA). A validation of the numerical model was accomplished by comparing results for interference
effects of identical footings with existing studies in terms of interference factors ξγ. Furthermore, nonidentical footings with equally and
differently scaled stresses were studied and corresponding failure mechanisms analyzed. In total, four types of failure mechanisms could be
identified in which two mechanisms always compete each other, depending on friction angle, footing widths, spacing, and loading. In contrast
to identical footings with combined failure mechanisms, the results show that for nonidentical footings, failure mechanisms most likely
develop only below one footing.
Original languageEnglish
Article number04020041
Pages (from-to)04020041-1
Number of pages4020041
JournalJournal of Geotechnical and Geoenvironmental Engineering
Issue number6
Publication statusPublished - 1 Jun 2020

ASJC Scopus subject areas

  • Environmental Science(all)
  • Geotechnical Engineering and Engineering Geology

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