Interference of Two Asymmetric Closely Spaced Strip Footings Resting on Nonhomogeneous and Linearly Elastic Soil Bed
Publication: International Journal of Geomechanics
Volume 13, Issue 6
Abstract
This paper presents a study using the FEM on the effect of interference on the settlement of two closely spaced rough rigid strip footings resting on the surface of linearly elastic finite and infinite nonhomogeneous soil beds with the modulus of elasticity linearly varying with the depth. Both symmetric and asymmetric cases with respect to its geometry and applied loading have been considered in the analysis. The finite-element (FE) mesh was created using four-noded isoparametric elements. The results are presented in terms of the interaction factors, which are defined as the ratio of the settlement of the interfering footings with the corresponding value of the settlement of the isolated footing identifying the influence of the size of the footings, loading on the footings, and clear spacing between the footings. The settlement of the interfering footings is observed to be greater than the settlement of the isolated footing of the same width and loading. With an increase in the stiffness of the soil, the effect of interference on the settlement is reduced.
Get full access to this article
View all available purchase options and get full access to this article.
References
Das, B. M., and Larbi-Cherif, S. (1983). “Bearing capacity of two closely-spaced shallow foundations on sand.” Soils Found., 23(1), 1–7.
Das, B. M., Puri, V. K., and Neo, B. K. (1993). “Interference effects between two surface footings on layered soil.” Transportation Research Record 1406, Transportation Research Board, Washington, DC, 34–40.
Desai, C. S., and Abel, J. H. (1972). Introduction to the finite element method: A numerical method for engineering analysis, Van Nostrand Reinhold, New York.
Ghosh, P., and Sharma, A. (2010). “Interference effect of two nearby strip footings on layered soil: Theory of elasticity approach.” Acta Geotech., 5(3), 189–198.
Gibson, R. E. (1967). “Some results concerning displacements and stresses in a non-homogeneous elastic half-space.” Geotechnique, 17(1), 58–67.
Graham, J., Raymond, G. P., and Suppiah, A. (1984). “Bearing capacity of three closely-spaced footings on sand.” Geotechnique, 34(2), 173–182.
Hansen, B. J. (1970). “A revised and extended formula for bearing capacity.” Bulletin No. 28, Danish Geotechnical Institute, Copenhangen, Denmark.
Kattan, P. I. (2007). MATLAB guide to finite elements: An interactive approach, 2nd Ed., Springer, New York.
Kouzer, K. M., and Kumar, J. (2010). “Ultimate bearing capacity of a footing considering the interference of an existing footing on sand.” Geotech. Geologic. Eng., 28(4), 457–470.
Kumar, J., and Bhattacharya, P. (2010). “Bearing capacity of interfering multiple strip footings by using lower bound finite elements limit analysis.” Comput. Geotech., 37(5), 731–736.
Kumar, J., and Bhoi, M. K. (2009). “Interference of two closely spaced strip footings on sand using model tests.” J. Geotech. Geoenviron. Eng., 135(4), 595–604.
Kumar, J., and Ghosh, P. (2007). “Ultimate bearing capacity of two interfering rough strip footings.” Int. J. Geomech., 7(1), 53–61.
Kumar, J., and Kouzer, K. M. (2008). “Bearing capacity of two interfering footings.” Int. J. Numer. Analyt. Meth. Geomech., 32(3), 251–264.
Lee, J., Eun, J., Prezzi, M., and Salgado, R. (2008). “Strain influence diagrams for settlement estimation of both isolated and multiple footings in sand.” J. Geotech. Geoenviron. Eng., 134(4), 417–427.
Mabrouki, A., Benmeddour, D., Frank, R., and Mellas, M. (2010). “Numerical study of the bearing capacity for two interfering strip footings on sands.” Comput. Geotech., 37(4), 431–439.
Maheshwari, P., and Viladkar, M. N. (2007). “Strip footings on a three layer soil system: Theory of elasticity approach.” Int. J. Geotech. Eng., 1(1), 47–59.
MATLAB R2008a [Computer software]. Natick, MA, MathWorks.
Meyerhof, G. G. (1963). “Some recent research on the bearing capacity of foundations.” Can. Geotech. J., 1(1), 16–26.
Nainegali, L., and Basudhar, P. K. (2011). “Interference of two closely spaced footings: A finite element modeling.” Geo-Frontiers 2011: Advances in Geotechnical Engineering, ASCE, Reston, VA, 3726–3735.
Potts, D. M., and Zdravkovic, L. (1999). Finite element analysis in geotechnical engineering, Thomas Telford, London.
Saran, S., and Agarwal, V. C. (1974). “Interference of surface footings in sand.” Indian Geotech. J., 4(2), 129–139.
Selvadurai, A. P. S., and Rabbaa, S. A. A. (1983). “Some experimental studies concerning the contact stresses beneath interfering rigid foundations resting on a granular stratum.” Can. Geotech. J., 20(3), 406–415.
Stuart, J. G. (1962). “Interference between foundations with special reference to surface footings in sand.” Geotechnique, 12(1), 15–23.
Terzaghi, K. (1943). Theoretical soil mechanics, Wiley, New York.
Vesic, A. S. (1973). “Analysis of ultimate loads of shallow foundation.” J. Soil Mech. and Found. Div., 99(1), 45–73.
West, J. M., and Stuart, J. G. (1965). “Oblique loading resulting from interference between surface footings on sand.” Proc., 6th Int. Conf. on Soil Mechanics, Vol. 2, Montreal, 214–217.
Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 13 • Issue 6 • December 2013
Pages: 840 - 851
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jul 21, 2012
Accepted: Jan 16, 2013
Published online: Jan 18, 2013
Published in print: Dec 1, 2013
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.