Scale effect on the behavior of circular footing on geogrid-reinforced sand using numerical analysis

IF 1.7 Q3 ENGINEERING, GEOLOGICAL

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-12-27 DOI:10.1080/17486025.2021.2007301

Danny Useche-Infante, Gonzalo Aiassa Martínez, P. Arrua, M. Eberhardt

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引用次数: 0

Abstract

ABSTRACT 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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土工格栅加筋砂土圆形基脚性能的尺度效应数值分析

摘要采用平板荷载试验来评估浅层地基承载力对土工格栅加筋砂土的规模效应是昂贵的，因为需要建造大型箱，并且将荷载施加到加筋土上的装置很复杂。因此，有限元法是研究这一现象的一种替代方法。在本研究中，建立了一系列三维轴对称有限元模型，以研究土工格栅加筋砂土上圆形基脚承载力的比例效应。首先，对土工格栅加筋砂支撑的直径为100mm的圆形基础进行了模拟，以通过实验室试验验证有限元模型。随后，通过按相同比例增加基础直径和土工格栅直径，制作了不同的模型。模拟结果表明，随着地基直径的增大，无筋土和加筋土的承载力减小。同样，当模型尺寸增加时，从加固中获得的益处较小。

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来源期刊

Geomechanics and Geoengineering-An International Journal ENGINEERING, GEOLOGICAL-

CiteScore

3.80

自引率

0.00%

发文量

期刊介绍： Geomechanics is concerned with the application of the principle of mechanics to earth-materials (namely geo-material). Geoengineering covers a wide range of engineering disciplines related to geo-materials, such as foundation engineering, slope engineering, tunnelling, rock engineering, engineering geology and geo-environmental engineering. Geomechanics and Geoengineering is a major publication channel for research in the areas of soil and rock mechanics, geotechnical and geological engineering, engineering geology, geo-environmental engineering and all geo-material related engineering and science disciplines. The Journal provides an international forum for the exchange of innovative ideas, especially between researchers in Asia and the rest of the world.