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Bearing capacity of two interfering strip footings from lower bound finite elements limit analysis
Author(s) -
Kumar Jyant,
Bhattacharya Paramita
Publication year - 2011
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.1104
Subject(s) - limit analysis , bearing capacity , finite element method , geotechnical engineering , limit (mathematics) , structural engineering , limit load , upper and lower bounds , engineering , mathematics , mathematical analysis
SUMMARY A rigorous lower bound solution, with the usage of the finite elements limit analysis, has been obtained for finding the ultimate bearing capacity of two interfering strip footings placed on a sandy medium. Smooth as well as rough footing–soil interfaces are considered in the analysis. The failure load for an interfering footing becomes always greater than that for a single isolated footing. The effect of the interference on the failure load (i) for rough footings becomes greater than that for smooth footings, (ii) increases with an increase in ϕ , and (iii) becomes almost negligible beyond S / B > 3. Compared with various theoretical and experimental results reported in literature, the present analysis generally provides the lowest magnitude of the collapse load. Copyright © 2011 John Wiley & Sons, Ltd.