Abstract
Piled raft foundations are now the most desirable foundation system in comparison with the alternative foundation system because of its load sharing mechanism, where the total structural load is partly carried by the piles and partly by the raft. However, due to the complication involved in computing the load sharing mechanism, the research in this field is lagging behind. The complex soil structure interactions which are dependent on various components such as geometry of the pile and raft, sub-soil condition, pile spacing, and normalized settlement may raise the complex load sharing mechanism of PRF. The main intention of this paper is to investigate the load sharing mechanism of PRF subjected to the vertical and lateral load and to develop a prediction model for estimating the load sharing ratio (LSR). Three-dimensional finite element analysis through ABAQUS 3D software is accomplished to develop a prediction model for assessing LSR. The results of vertical load response reveal that the vertical LSR continuously decreases with the increase in the normalized settlement, whereas in the lateral loading case, the lateral LSR continues to increase with the increment in the normalized lateral displacement. The results of numerical analysis also reveal that the LSR is a function of normalized settlement. Therefore, a prediction model is established for estimating the load sharing ratio with respect to the normalized settlement, and this prediction model would be helpful to improve the conventional design of PRF.
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Deb, P., Pal, S.K. (2021). Load Sharing Mechanism of Piled Raft System Under Vertical and Lateral Loading. In: Satyanarayana Reddy, C.N.V., Saride, S., Haldar, S. (eds) Transportation, Water and Environmental Geotechnics. Lecture Notes in Civil Engineering, vol 159. Springer, Singapore. https://doi.org/10.1007/978-981-16-2260-1_38
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DOI: https://doi.org/10.1007/978-981-16-2260-1_38
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