Abstract
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.
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 language | English |
|---|---|
| Article number | 04020041 |
| Pages (from-to) | 04020041-1 |
| Number of pages | 4020041 |
| Journal | Journal of Geotechnical and Geoenvironmental Engineering |
| Volume | 146 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Jun 2020 |
ASJC Scopus subject areas
- Environmental Science(all)
- Geotechnical Engineering and Engineering Geology