Constitutive Model for Fibre Reinforced Cemented Silty Sand

IF 1.7 Q3 ENGINEERING, GEOLOGICAL
Muhammad Safdar, T. Newson, Faheem Shah
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引用次数: 0

Abstract

ABSTRACT In this study, a modified version of Severn–Trent constitutive model was used to simulate the mechanical behaviour of composite materials under drained and undrained triaxial compression loading conditions. Two additional parameters obtained from the laboratory tests were added to the standard Severn–Trent model to simulate the stress-strain behaviour of cement and fibre-reinforced Toyoura silty sand. The model parameters were derived based on the experimental results performed, parametric study, trial and error and by comparison with previous research studies. The comparisons covered ranges of material from 0% to 3% fibre, 0% to 3% cement, 20% to 60% relative densities, and silt contents of up to 75%. The experimental results and model simulations were compared in terms of deviatoric stress versus axial strain, volumetric strain versus axial strain, and stress path behaviour. A close agreement of model simulations with the experimental results is observed for many of the tests performed on pure Toyoura sand, cemented, fibre, and fibre-reinforced cemented Toyoura silty sand. The extracted parameters are used to predict the response of those experiments until a reasonable (e.g. ± 5–10% peak strength) comparison is obtained.
纤维增强水泥粉砂的本构模型
摘要在本研究中,使用Severn–Trent本构模型的修改版本来模拟复合材料在排水和不排水三轴压缩载荷条件下的力学行为。将从实验室试验中获得的两个附加参数添加到标准Severn–Trent模型中,以模拟水泥和纤维增强Toyura粉砂的应力-应变行为。模型参数是根据实验结果、参数研究、试验和误差以及与以往研究的比较得出的。比较涵盖了0%至3%纤维、0%至3%水泥、20%至60%相对密度和高达75%淤泥含量的材料范围。从偏应力与轴向应变、体积应变与轴向应变以及应力路径行为的角度对实验结果和模型模拟进行了比较。在纯Toyoura砂、胶结、纤维和纤维增强胶结Toyoura粉砂上进行的许多试验中,观察到模型模拟与实验结果非常一致。提取的参数用于预测这些实验的响应,直到获得合理的(例如±5–10%的峰值强度)比较。
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来源期刊
CiteScore
3.80
自引率
0.00%
发文量
27
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.
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