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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.Mirsayapov Ilizar Talgatovich doctor of technical sciences, professor Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1
Title of the articleThe load-bearing capacity of slab-pile foundations, taking into account the redistribution of forces between piles during cyclic loading
Abstract.Problem statement. The aim of the work is to study the load-bearing capacity of the raft-pile foundation under cyclic loading, taking into account the redistribution of forces between the piles. The load-bearing capacity of a raft-pile foundation under cyclic loading consists of three components: piles, the soil under the slab and soil under the lower end of the piles. The sediment of pushing through the raft-pile foundation significantly changes the distribution of loads on the piles, especially on the extreme and corner ones, which are overloaded. In this article, this process is considered in three-dimensional mode, taking into account the joint deformation of all elements of the system «pile cap – piles–soil between piles – soil below the toe». It takes into account the redistribution of forces between the elements of the system under cyclic loading due to the occurrence of deformations of the soil, pile grillage and piles in the appropriate conditions. The load-bearing capacity of the raft-pile foundation is determined for the stage when tangential stresses along the side surface are absent in the upper and middle part of the pile as a result of reaching the maximum shear resistance. The soil is forced under the tip when the stress under the fifth pile and under the plate exceeds the fatigue strength and maximum deformations of the soil under three-axis cyclic compression. Results. Theoretical studies are carried out and the redistribution of forces between the main elements of the raft-pile foundation is considered. The change in the stress-strain state of the base of the raft-pile foundation under cyclic loading due to the redistribution of forces between the corner, extreme and ordinary piles is considered. Conclusions. The significance of the results obtained for the construction industry is that for the first time the proposed method allows us to assess the load-bearing capacity of the slab-pile foundation. Comparison of the results of calculations for the proposed model with experimental studies showed good convergence.
Keywords.raft-pile foundation, pile, settlement, soil, cyclic loading.
For citations:Mirsayapov Ilizar T. Load-bearing capacity of slab-pile foundations, taking into account the redistribution of forces between piles during cyclic loading // Izvestija KGASU. 2021. № 1 (55). Р. 5–12. DOI: 10.52409/20731523_2021_2_5.


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