UTN- FRC -Producción Académica de Investigación y Desarrollo - Artículos

Permanent URI for this collectionhttp://48.217.138.120/handle/20.500.12272/2453

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Author: search.filters.author.Arrúa, Pedro ArielSubject: search.filters.subject.load stress

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    Scale effect on the behavior of circular footing on geogrid-reinforced sand using numerical analysis
    (2021) Useche Infante, Danny; Aiassa Martínez, Gonzalo Martín; Arrúa, Pedro Ariel; Eberhardt, Marcelo Gabriel
    Using plate load test to evaluate the scale effects of shallow foundation bearing capacity on geogrid-reinforced sand is expensive because large boxes need to be built, and the devices to apply the loads to the reinforced soil are complex. Consequently, the finite element method is an alternative to investigate this phenomenon. In this study, a series of 3D axi-symmetry finite element models were developed to study the scale effect on the bearing capacity of circular footings resting on geogrid-reinforced sand. First, a 100 mm-diameter circular foundation supported by geogrid-reinforced sand was simulated in order to validate the finite element model with laboratory tests. Subsequently, different models were made by increasing the diameter of the foundation and the diameter of the geogrid in the same proportion. Modelling results indicated that as the foundation diameter increased, the bearing capacity of unreinforced and reinforced soil decreased. Likewise, the benefit obtained from the reinforcement was less when the model size was increased
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    Scale model to measure stress under circular footings resting on sand
    (2018) Useche Infante, Danny; Aiassa Martínez, Gonzalo Martín; Arrúa, Pedro Ariel; Eberhardt, Marcelo Gabriel
    This paper presents the results of a series of load tests carried out with a foundation model supported by sand. The aim of this study is to measure the stresses in the soil that occur when applying loads with a circular foundation model. Sand was placed in a circular tank of 60 cm in diameter and 45 cm in height. Diaphragm load cells were used to measure the stresses. It was used to determine the effect of the relative density in the vertical distribution of stresses in the sand. The stresses measured with the load cells were compared with those estimated with the Boussinesq’s method and were validated using a finite element model. The results showed that the inclusion of cells in the soil produced an alteration in the stress–settlement behaviour of circular footing resting on sand. Boussinesq’s method presented an acceptable approximation to the stresses measured with the load cells.