CENTRIFUGAL MODELLING : A REMEDY OF SCALING ERROR EFFECT IN GEOTECHNICAL MODELLING ?
DOI:
https://doi.org/10.11113/mjce.v7.15554Keywords:
t extrapolation of the latter to field scale to be evaluated. (Keywords, Centrifuge, Scaling Effect, Prototype, Model, Conventional, Stress)Abstract
Serious scaling effect has been overlooked since the concept of modelling technique was introduced. Even though dimensional analysis is the best tool when relating the model-prototype however, the scaling of stresses needs yet to be justified. This paper demonstrates the presence of scaling effect by comparing 3 model studies based on a centrifugal and conventional small model test using sand as an embedment media. This enables potential errors in direct extrapolation of the latter to field scale to be evaluated.References
Avgherinos, P.] and Schofield, A.N (I969), "Drawdown Failure of Centrifuge Models". Prof. of the 7th ICSMFE, Moxico, Vol. 2, pp
-505.
Basset, R.H. and Horner, ] (I979), "Prototype Deformations from Centrifuge Model Test". Design Parameters in Geotechnical
Engineering, Vol. 2, pp 1-9, BGS London.
Bucky, P.B, Solakian, A.G and Baldin, L.S (I935), "Centrifugal
Method of Testing Models". Civil Engineering, Vol. 5, pp 287-290.
Craig, W.H. (I989), "Edouard Philips (1821-1889) and the idea of Centrifuge Modelling". GEOTECHNIQUE, The Institution of Civil Engineering, London, No. 4,.Vol. 39, pp. 697-700.
Craig, W.H. (I983), "Simulation of Foundation for Offshore Structllre using Centrifuge Modelling ". ed. Banerjee, P.K and Butterfeld, R. Development in Soil Mechanics and Foundation Engineering. Model Studies: Vol I, pp 1-25.41
Craig, W.H. (1985), "Modelling Pile Installation in Centrifuge
Experiments" Proc. of the 11th ICSMFE- San Fransisco, Vol 2, pp
-1104.
Craig, W.H. (1989), "The Use of Centrifuge in Geotechnical
Engineering Education ". Geotechnical Testing Journal, NO.4, Vol.
, pp 288-291.
Dickin E.A and Leung C.F (1983), "Centrifuge Model Test on Vertical Anchor Plate". Journal of Geotechnical Engineering, Proc. of the ASCE, No. 12, Vol. 109, pp 1503-1525.
Dickin E.A and Leung C.F (1985), "Evaluation of Design Methods for Vertical Anchor Plate". Journal of Geotechnical Engineering, Proc.of the ASCE, NO.4, Vol. 111, pp 500-520.
Dickin E.A and Nazir, R (1993), "Centrifugal Modelling of Side Bearing Foundation in Sand". Report No. CE/26/93, Dept. of Civil Engineering, University of Liverpool.
[II] Dickin E.A and Nazir, R (1994), "Appraisal of Design Methods for Laterally Loaded Short Piles in Sand". GEOTROPIKA 94, Regional Conference in Geotechnical Engineering, pp 2/2-2/12.
Franke, E and Muth, G. (1985), "Scale Effect in 19-Model Test on Horizontally Loaded Piles". Proc. of the 11th ICSMFE, San Francisco, Vol. 2, pp 1011-1014.
Fuglsang L.D & Ovesen N. K (1988), "The Application of the Theory of Modelling to Centrifuge Studies". Centrifuge in Soil Mechanics, ed.Craig W.H, James, R.,G and Schofield A.N, 119-138. Balkema Rotterdam.
King, J.G.W, Dickin, E.A and Lyndon, A (1984), "The Development of a medium-Size Centrifuge Testing Facility". Symposium of Application of Centrifuge Modelling in Geotechnical Design, Manchester, pp 25-46.
' Leung, C.F (1981), "The Effect of Shapes, Size and Embedment on the Load Displacement Behaviour of Vertical Anchor in Sand", Ph.D Thesis, University of Liverpool.
Liem, D.H.W (1988), "Appraisal of Lade's Elasto-Plastic Soil Model and Their Application to Vertical Anchor in Sand". Ph.D Thesis, University of Liverpool.
Nazir, R (1994), "The Moment Carrying Capacity of Short Piles in Sand". Ph.D Thesis, University of Liverpool.
Pokrovsky, G.I and Fedorov, I.S (1936), "Studies of Soil Pressures and Deformations by Means of a Centrifuge". Proc. of 1st lCSMFE Harvard, Vol. 1, pp 70