Numerical Study of the Behaviour of a Circular Footing on a Layered Granular Soil Under Vertical and Inclined Loading

• Autorzy: Singh Surja Pratap , Roy Amrit Kumar

Identyfikatory

DOI

10.2478/ceer-2021-0002

• Języki publikacji: EN

Abstrakty

EN

This paper aims to study the behaviour of a circular footing resting on two granular layers, i.e., a dense sand layer resting on loose sand strata, subjected to a vertical and an inclined loading (α=0°, 10°, 20°, 30°) using the finite element (FE) software PLAXIS-3D. The Mohr-Coulomb criterion is employed for the analysis of the model, in which two parameters are considered to vary significantly; (1) thickness of the top layer (dense layer) and (2) friction angle (ф) of both the layers. In the circular footing, the bearing capacity on the layered soil profile is assessed using the mechanism of punching shear failure following the desired area approach. The punching shear failure mechanism formed in dense sand has a parabolic shape at the ultimate load when the maximum mobilization of shear force through the failure surface is taken into account, otherwise, the punching failure is the actual failure while punching in the lower layer continues to a greater extent, depending on the interface load. Bearing pressure decreases as the inclination increases with respect to the vertical, along with bearing pressure increasing as the thickness of the dense sand layer increases. The software results compare well with data available from the literature.

Słowa kluczowe

EN

circular footing; layered granular soil; numerical modelling; model tests

PL

fundament kołowy; grunt ziarnisty; podłoże warstwowe; modelowanie numeryczne; testy modelowe

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: Civil and Environmental Engineering Reports
• Rocznik: 2021
• Tom: Vol. 31, no. 1
• Strony: 29--43
• Opis fizyczny: Bibliogr. 15 poz., rys., tab., wykr.

Twórcy

autor

Singh Surja Pratap

• Department of Civil Engineering, NIT Hamirpur, Himachal Pradesh - student, India

autor

Roy Amrit Kumar

• Department of Civil Engineering, NIT Hamirpur, Himachal Pradesh, India

Bibliografia

• 1. Acharyya, R. and Dey, A. 2017. Finite Element Investigation of the Bearing Capacity of Square Footings Resting on Sloping Ground. INAE Letters, 2(3), 97–105.
• 2. Bolton, MD 1986. The strength and dilatancy of sands. Geotechnique, 36(1), 65–78.
• 3. Bowles, JE 1977. Foundation analysis and design. McGraw-Hill.
• 4. Burd, HJ and Frydman, S., 1997. Bearing capacity of plane-strain footings on layered soils. Canadian Geotechnical Journal, 34(2), 241–253. https://doi.org/10.1139/cgj-34-2-241.
• 5. Chakraborty, D., Kumar, J., 2015. Seismic bearing capacity of shallow embedded foundations on a sloping ground surface. International Journal of Geomechanics, 15(1), 1-18.
• 6. HANNA, AM 1981. Foundation on Strong Sand Overlying Weak Sand. J. Geotech. Engrg. Div., 107(7), 915–927.
• 7. HANNA, AM 1982. Bearing Capacity of Foundations on a Weak Sand Layer Overlying a Strong Deposit. Can Geotech J, V 19(N 3), 392–396.
• 8. Khatri, VN., Kumar, J. and Akhtar, S., 2017. Bearing capacity of foundations with inclusion of dense sand layer over loose sand strata. International Journal of Geomechanics, 17(10), 1-8.
• 9. Meyerhof, GG 1974. Ultimate Bearing Capacity of Footings on Sand Layer Overlying Clay. Can Geotech J, 11(2), 223-229.
• 10. Michalowski, RL and Shi, L., 1995. Bearing capacity of footings over two layer foundation soils. Journal of Geotechnical Engineering, 121(5), 421-428.
• 11. Ornek, M., Demir, A., Yildiz, A. and Laman, M. 2012. Numerical analysis of circular footings on natural clay stabilized with a granular fill. Acta Geotechnica Slovenica, 9(1), 61-75.
• 12. Sharma, V. and Kumar, A., 2018. Behavior of ring footing resting on reinforced sand subjected to eccentric-inclined loading. Journal of Rock Mechanics and Geotechnical Engineering, 10(2), 347-357.
• 13. Shiau, JS, Lyamin, AV and Sloan, SW 2003. Bearing capacity of a sand layer on clay by finite element limit analysis. Canadian Geotechnical Journal, 40(5), 900-915.
• 14. Thakur, A. and Dutta, RK 2020. Experimental and numerical studies of skirted hexagonal footings on three sands. SN Applied Sciences, 2(3), 1-11.
• 15. Zidan, AF 2012. Numerical Study of Behavior of Circular Footing on Geogrid-Reinforced Sand Under Static and Dynamic Loading. Geotechnical and Geological Engineering, 30(2), 499-510.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).