THERMAL SCIENCE
International Scientific Journal
AN ANISOTROPIC MODEL OF UNBOUND GRANULAR MATERIAL UNDER REPEATED LOADING
ABSTRACT
The base and subbase layers of a pavement are compacted to the desired density by rollers. This cause the anisotropy in other words the layer more stiffer in the vertical direction than the horizontal direction. In the study inherent and stress induced anisotropy were measured by using the repeated load triaxial test equipment which is able cycle both confining and axial pressure. The test results were then modelled using the stepwise regression. A new cross anisotropic model was proposed to predict the unbound stress-strain behavior. The proposed model is able to predict the axial strain more accurately than the radial strain.
KEYWORDS
PAPER SUBMITTED: 2018-10-21
PAPER REVISED: 2018-11-20
PAPER ACCEPTED: 2019-01-05
PUBLISHED ONLINE: 2019-03-09
THERMAL SCIENCE YEAR
2019, VOLUME
23, ISSUE
Supplement 1, PAGES [S295 - S302]
- Casagrande, A & Carillo, N., Shear Failure of Anisotropic Materials, Proc. of Boston Society of Civil Engineers, 31 (1944), pp 74-87
- Biarez, J & Hicher, PY,, Simplified Hypotheses On Mechanical Properties Equally Applicable to Sands and Clays, Int. Workshop on Constitutive Equations for Granular Non-cohesive Soils, Cleveland, 1987, pp 19-32
- Arthur, JRF & Menzies, BK., Inherent Anisotropy in a Sand, Geotechnique, 22 (1972), 1, pp. 115-128
- Ochai, H & Lade PV., Three Dimensional Behaviour of Sand with Anisotropic Fabric, Journal of Geoetechnical Engineering, ASCE, 109 (1983), 10, pp 1313-1328
- Gerrard, CM & Mulholland, P, 1966, Stress Strain And Displacement Distributions in Cross-anisotropic and Two Layer Isotropic Elastic Systems, ARRB Proceedings, 3 (1966), 3, pp. 1123-1158
- Biarez, J & Wiendieck K., La Comparasion Qualitative Entre l'anisotropie Mecanique et l'anisotropie de Structure des Millieux Pulverulents, C.R. Hebd Seance du Academie des Science, Paris, 256 (1963), pp 1217-1220
- Arthur JRF, Chua,KS & Dunstan, T, 1977, Induced Anisotropy in a Sand, Geotechnique, 27 (1977), 1, pp 13-30
- Symes, MJPR, Gens, A & Hight DW, 1984, Undarined Anisotropy and Principal Stress Rotation in Saturated Sand, Geotechnique, 34 (1984), 1, pp 11-27
- Haruyama, M., Anisotropic Deformation- Strength Characteristics of an Assembly of Spherical Particles under Three Dimensional Stresses, Soils and Foundations, 21(1981), 4, pp 41-55.
- Wong, RKS & Arthur, JRF., Induced and Inherent Anisotropy in Sand, Geotechnique, 35(1985), 4, pp 471-481
- Matsuoka, H & Ishizaki, H., Deformation and Strength of Anisotropic Soil, Proc. 10th Int. Conf. on Soil Mechanics and Foundation Eng., Sweeden, 1 (1981), pp. 699-706
- Morgan JR & Gerrard CM., Anisotropy and Non-linearity in sand properties, Proc. 8th Int. Conf. On Soil Mechanics and Foundation Eng., Moskow, 1(1973), pp. 287-292
- Karasahin, M., Resilient behaviour of granular materials for analysis of highway pavements, PhD. thesis, University of Nottingham, UK, 1993
- Karasahin, M. and Dawson, A.R., Anisotropic Characteristics of Granular Material, Proc. Of Fifth International Syposium on Unbound Aggregates in Roads, Nottigham, UK, 2000, pp:139-143.
- Tutumluer, E., and Seyhan, U., Laboratory determination of anisotropic aggregate resilient moduli using a new innovative test device, Accepted for Presentation and Publication at the 78th Annual Meeting of the Transportation Research Board, 1999, National Research Council, Washington, D.C., USA
- Tarefder, R.A., Ahmed, M.U. and Rahman, A., Effects of Cross-anisotropy and Stress Dependency of Pavement Layers on Pavement Responses under Dynamic Truck Loading, Journal of Rock Mechanics and Geotechnical Engineering, 8 (2016), pp:366- 377
- Cai, Y., Sangghaleh, A. and Pan, E., Effect of Anisotropic Base/interlayer on the Mechanistic Responses of Layered Pavements, Computers and Geotechnics, 65 (2015), pp:250-257
- Jing, P., Nowamooz, H. and Chazallon, C., Effect of Anisotropy on Resilient Behaviour of a Granular Material in Low Traffic Pavement, Materials, 10 (2017), pp: 1-16
