Numerical estimation of the subgrade reaction modulus of a horizontally loaded piled raft

Francisco Javier  Alva García; Marcio Muniz de Farias; Liosber Medina Garcia

doi:10.7764/RDLC.23.3.538

Authors

Francisco Javier Alva García INFRALAB, University of Brasilia (UnB), Brasilia (Brazil)
Marcio Muniz de Farias Deptartment of Civil and Environmental Engineering, University of Brasilia, Brasilia (Brazil)
Liosber Medina Garcia Transport Engineering Department, Federal University of Goias, Goias (Brazil)

DOI:

https://doi.org/10.7764/RDLC.23.3.538

Keywords:

Piled raft, horizontal load, soil-structure interaction, Abaqus numerical modeling.

Abstract

A horizontal full-scale test was executed in a piled raft with a single pile. Later, from those measured experimental results, some numerical simulations were carried out using a commercial software Abaqus 2019 obtaining acceptable approximations. During the numerical analysis, the elastic-plastic behavior of each material comprising the foundation system has been considered, including the soil, the concrete, and the steel. Based on such numerical approximations, a polynomial function that represent the pile deflections along the pile shaft has been calculated and plotted. Later, from this function the rotation, the bending moments, the shearing forces, and the load intensity along the pile were estimated; also, the subgrade reaction modulus of the soil was computed, and some p-y curves at specific depth points are presented according to the numerical results. Finally, this paper allowed obtaining a clear idea about the behavior and distribution of the internal forces not only in the foundation soil but also in the pile, from a success numerical performance.

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