Using small-strain stiffness to predict the load-settlement behaviour of shallow foundations on sand

dc.contributor.authorArcher, Andre
dc.contributor.authorHeymann, Gerhard
dc.contributor.emailgerhard.heymann@up.ac.zaen_ZA
dc.date.accessioned2016-03-09T09:33:18Z
dc.date.available2016-03-09T09:33:18Z
dc.date.issued2015-06
dc.description.abstractFoundation settlement prediction is a challenging task due to the difficulties associated with the quantification of the soil stiffness and the abundance of available analysis methods. Of the different soil stiffness moduli that may be measured, the initial small-strain stiffness is important since it can be measured both in the field and the laboratory, and settlement prediction methods using this parameter are becoming more common. The objective of this paper is to present a settlement prediction method for shallow foundations that only uses small-strain stiffness as input parameter. The method was developed by conducting physical modelling in the geotechnical centrifuge at the University of Pretoria to quantify the behaviour of shallow foundations on sand. Bender and extender elements were used to obtain the small-strain stiffness profile below the foundation before it was vertically loaded and the load-settlement curve determined. The tests were conducted on different density sands corresponding to loose, medium-dense and dense sand. A non-linear stepwise analysis approach was used in conjunction with a softening function, with variables calibrated to obtain the best fit solution for the different sand densities. Results indicate that the accuracy of the proposed method decreases as the sand density increases, but that load-settlement behaviour can be predicted with reasonable accuracy.en_ZA
dc.description.librarianhb2015en_ZA
dc.description.urihttp://www.journals.co.za/ej/ejour_civileng.htmlen_ZA
dc.identifier.citationArcher, A. & Heymann, G 2015, 'Using small-strain stiffness to predict the load-settlement behaviour of shallow foundations on sand', Journal of the South African Institution of Civil Engineering, vol. 57, no. 2, Art #1165, pp. 28-35.en_ZA
dc.identifier.issn1021-2019
dc.identifier.other10.17159/2309-8775/2015/v57n2a4
dc.identifier.urihttp://hdl.handle.net/2263/51747
dc.language.isoenen_ZA
dc.publisherSouth African Institution of Civil Engineeringen_ZA
dc.rightsSouth African Institution of Civil Engineeringen_ZA
dc.subjectShallow foundationsen_ZA
dc.subjectSmall-strain stiffnessen_ZA
dc.subjectSoil stiffnessen_ZA
dc.subjectAnalysis methodsen_ZA
dc.subjectSettlement prediction methoden_ZA
dc.subject.otherEngineering, built environment and information technology articles SDG-09
dc.subject.otherSDG-09: Industry, innovation and infrastructure
dc.titleUsing small-strain stiffness to predict the load-settlement behaviour of shallow foundations on sanden_ZA
dc.typeArticleen_ZA

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Archer_Using_2015.pdf
Size:
267.29 KB
Format:
Adobe Portable Document Format
Description:
Article

License bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description: