Behavior of Nonidentical Differently Loaded Interfering Rough Footings

Combined failure; Failure mechanism; Finite element limit analysis; Interference effects; Interference factor; Interfering effect; Lower and upper bounds; System behaviors; Geotechnical Engineering and Engineering Geology; Environmental Science (all); General Environmental Science

Abstract :

[en] 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 ζγ. 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.

Disciplines :

Civil engineering

Author, co-author :

Schmüdderich, Christoph ; Department of Soil Mechanics, Foundation Engineering and Environmental Geotechnics, Ruhr-Universität Bochum, Bochum, Germany

ALIMARDANI LAVASAN, Arash ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE)

Tschuchnigg, Franz ; Institute of Soil Mechanics, Foundation Engineering and Computational Geotechnics, Graz Univ. of Technology, Graz, Austria

Wichtmann, Torsten; Department of Soil Mechanics, Foundation Engineering and Environmental Geotechnics, Ruhr-Universität Bochum, Bochum, Germany

External co-authors :

yes

Language :

English

Title :

Behavior of Nonidentical Differently Loaded Interfering Rough Footings

Publication date :

June 2020

Journal title :

Journal of Geotechnical and Geoenvironmental Engineering

ISSN :

1090-0241

Publisher :

American Society of Civil Engineers (ASCE), Reston, Usa

Volume :

146

Issue :

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://ascelibrary.org/doi/pdf/10.1061/%28ASCE%29GT.1943-5606.0002255

Available on ORBilu :

since 23 December 2023

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