Static Response of a Pile Group in the Domain of Uncertainty
Publication: Geo-Congress 2023
ABSTRACT
Pile foundations may have different types of loads, such as axial, lateral, dynamic loads, and other kinds of loads on them. The present study focuses on the static response of the pile group subjected to axial and lateral loads. Soil, being formed after various natural processes, generally consists of uncertainties in most of its parameters. Uncertainty in geotechnical engineering is mainly attributed to inherent or spatial variability. It is a function of differences in soil properties from location to location, and is focused on here. The angle of internal friction is considered as an uncertain property in the present stochastic study. Uncertainty is incorporated in the form of coefficient of variation. The analysis has been performed using the three-dimensional finite-difference program, i.e., FLAC3D. The prime objective of the present study is to observe the stochastic behaviour of the pile group’s lateral deflection under the combined action of axial and lateral loads. The statistical factors, mean, and variance of the probabilistic density function of the responses are assessed. It has been found that the coefficient of variation in the soil properties significantly affects the deflection magnitudes.
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REFERENCES
Achmus, M., and Thieken, K. (2010). “On the behaviour of piles in non-cohesive soil under combined horizontal and vertical loading.” Acta Geotech., 5(3), 199–210.
Baecher, G. B., and Christian, J. T. (2006). “The influence of spatial correlation on the performance of earth structures and foundations.” In Geo-Congress 2006: Geotechnical Engineering in the Information Technology Age, American Society of Civil Engineers (ASCE), 194.
Baecher, G. B., and Christian, J. T. (2005). Reliability and Statistics in Geotechnical Engineering. John Wiley & Sons, Ltd.
Briaud, J. L., Tucker, L. M., and Ng, E. (1989). “Axially loaded 5 pile group and single pile in sand.” In Proceedings of the International Conference of Soil Mechanics and Foundation Engineering, ISSMGE, Rio de Janeiro, 1121–1124.
Chatterjee, K., Choudhury, D., Rao, V. D., and Poulos, H. G. (2019). “Seismic response of single piles in liquefiable soil considering P-delta effect.” Bull. Earthquake Eng., 17(6), 2935–2961.
Chatterjee, K., Choudhury, D., and Kumar, M. (2022). “Infuence of depth of liquefable soil layer on dynamic response of pile group subjected to vertical load.” Bull. Earthquake Eng., 20, 113–114.
Haldar, S., and Babu, G. L. S. (2008). “Effect of soil spatial variability on the response of laterally loaded pile in undrained clay.” Comput. Geotech., 35(4), 537–547.
Hazzar, L., Karray, M., Bouassida, M., and Hussien, M. N. (2013). “Ultimate lateral resistance of piles in cohesive soil.” Deep Found. Inst. J., 7(1), 59–68.
Hazzar, L., Hussien, M. N., and Karray, M. (2016). “Investigation of the influence of vertical loads on the lateral response of pile foundations in sand and clay soils.” J. Rock Mech. Geotech. Eng., 9(2), 291–304.
Hazzar, L., Hussien, M. N., and Karray, M. (2017). “On the behaviour of pile groups under combined lateral and vertical loading.” Ocean Eng., 131, 174–185.
Hussien, M. N., Tobita, T., Iai, S., and Rollins, K. M. (2012). “Vertical load effect on the lateral pile group resistance in sand response.” Int. J. Geomech. Geoeng., 7(4), 263–282.
Hussien, M. N., Tobita, T., Iai, S., and Karray, M. (2014). “On the influence of vertical loads on the lateral response of pile foundation.” Comput. Geotech., 55, 392–403.
Harmouni, A., Dias, D., and Sbartai, B. (2017). “Probabilistic analysis of piled earth platform under concrete floor slab.” Soils Found., 57(5), 828–839.
Itasca Consulting Group Inc. (2017). “Fast Lagrangian analysis of continua in 3-dimensions.” FLAC3D version 6.0, user’s manual.
BIS (Bureau of Indian Standards). IS 2911 Part1: Section 4. (2010). Indian standard code of practice fordesign and construction of pile foundations. Bureau of Indian Standards, New Delhi.
Johari, A., Hosseini, S. M., and Keshavarz, A. (2017). “Reliability analysis of seismic bearing capacity of strip footing by stochastic slip lines method.” Comput. Geotech., 91, 203–217.
Karthigeyan, S., Ramakrishna, V. V. G. S. T., and Rajagopal, K. (2006). “Influence of vertical load on the lateral response of piles in sand.” Comput. Geotech,. 33(2), 121–131.
Karthigeyan, S., Ramakrishna, V. V. G. S. T., and Rajagopal, K. (2007). “Numerical investigation of the effect of vertical load on the lateral response of piles.” J. Geotech. Geoenviron. Eng., 133(5), 512–521.
Kawa, M., Bagińska, I., and Wyjadlowski, M. (2019). “Reliability analysis of sheet pile wall in spatially variable soil including CPTu test results.” Arch. Civ. Mech. Eng., 19(2), 598–613.
Kimura, M., Adachi, T., Kamei, H., and Zhang, F. (1995). “3-D finite element analyses of the ultimate behaviour of laterally loaded cast-in-place concrete piles.” In: Proceedings of the 5th International Symposium on Numerical Models in Geomechanics, 589–594.
Lacasse, S., and Nadim, F. (1996). “Model uncertainty in pile axial capacity calculations.” In: Proceedings of the 28th Offshore Technology Conference, Houston, Texas, 7996, 369–380.
Lacasse, S., and Nadim, F. (1998). “Risk and reliability in geotechnical engineering.” In: Proceedings of the Fourth International Conference on Case Histories in Geotechnical Engineering, St. Louis, Missouri, 5, 1172–1192.
Leung, Y. F., and Lo, M. K. (2018). “Probabilistic assessment of pile group response considering superstructure stiffness and three-dimensional soil spatial variability.” Comput. Geotech., 103, 193–200.
Muqtadir, A., and Desai, C. S. (1986). “Three-dimensional analysis of a pile-group foundation.” Int. J. Numer. Anal. Methods Geomech., 10(1), 41–58.
Naghibi, F., Fenton, G. A., and Griffiths, D. V. (2016). “Probabilistic considerations for the design of deep foundations against excessive differential settlement.” Can. Geotech. J., 53(7), 1167–1175.
Phoon, K.-K., and Kulhawy, F. H. (1999). “Characterization of geotechnical variability.” Canadian Geotechnical Journal, 36, 612–624.
Timoshenko, S. P., and Goodier, J. N. (2002). Theory of elasticity, 3rd edn., Tata McGraw-Hill Education, New Delhi.
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Geo-Congress 2023
Pages: 45 - 53
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Published online: Mar 23, 2023
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