Bounding Surface Constitutive Model for Cemented Sand under Monotonic Loading

Rahimi, Mojtaba; Chan, Dave; Nouri, Alireza

doi:10.1061/(asce)gm.1943-5622.0000534

Cited by 41 publications

(19 citation statements)

References 27 publications

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“…The plastic flow rule and hardening law are respectively given by:

and

where

is a plastic multiplier,

is the first-order homogeneous, generally nonlinear function, and G is a plastic-potential function. The non-associated flow rule was used to more realistically model the behavior of the treated pressure-sensitive materials such as biopolymer soils [ 34 , 35 ].…”

Section: Numerical Modelingmentioning

confidence: 99%

Macroscopic Stress-Strain Response and Strain-Localization Behavior of Biopolymer-Treated Soil

2022

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The enhancement of soil engineering properties with biopolymers has been shown recently as a viable and environmentally benign alternative to cement and chemical stabilization. Interest in biopolymer-treated soil is evident from the upsurge of related research activities in the last five years, most of which have been experimental in nature. However, biopolymers have not yet found their way into engineering practice. One of the reasons for this may be the absence of computational models that would allow engineers to incorporate biopolymer-treated soil into their designs. Therefore, the main goal of this study is to numerically capture a macroscopic stress-strain response and investigate the effect of biopolymers on the onset of strain localization. Several diagnostic strain-localization analyses were conducted, thus providing strain and stress levels at the onset of strain localization, along with the orientations of the deformation band. Several unconfined compression and triaxial tests on the plain and biopolymer-treated soils were modeled. Results showed that biopolymers significantly improved the mechanical behavior of the soil and affected the onset of strain localization. The numerical results were confirmed by the digital image analysis of the unconfined compression tests. Digital image processing successfully captured high strain concentrations, which tended to occur close to the peak stress.

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“…The plastic flow rule and hardening law are respectively given by:

and

where

is a plastic multiplier,

Section: Numerical Modelingmentioning

confidence: 99%

Macroscopic Stress-Strain Response and Strain-Localization Behavior of Biopolymer-Treated Soil

2022

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“…Despite numerous studies conducted, limited attention has been paid to the constitutive behaviour of MICP-treated soils. Several constitutive models can be found in the literature that have been developed for cemented soils [46,[125][126][127][128][129][130][131][132][133][134]. However, only in a very limited number of cases have the models been either developed or validated specifically for MICP-treated soils.…”

Section: Constitutive Modellingmentioning

confidence: 99%

State-of-the-Art Review of Microbial-Induced Calcite Precipitation and Its Sustainability in Engineering Applications

et al. 2020

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Microbial-induced calcite precipitation (MICP) is a promising new technology in the area of Civil Engineering with potential to become a cost-effective, environmentally friendly and sustainable solution to many problems such as ground improvement, liquefaction remediation, enhancing properties of concrete and so forth. This paper reviews the research and developments over the past 25 years since the first reported application of MICP in 1995. Historical developments in the area, the biological processes involved, the behaviour of improved soils, developments in modelling the behaviour of treated soil and the challenges associated are discussed with a focus on the geotechnical aspects of the problem. The paper also presents an assessment of cost and environmental benefits tied with three application scenarios in pavement construction. It is understood for some applications that at this stage, MICP may not be a cost-effective or even environmentally friendly solution; however, following the latest developments, MICP has the potential to become one.

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“…This requirement is reflected in the evolution rule for the internal state variable representing the cementation effect. Similar efforts have been made by Lee et al (2004), Hashiguchi and Mase (2007), Suebsuk et al (2011), andRahimi et al (2016). Key point (3) is to define a new effective stress for the deformation of cementtreated soils using the presented internal state variables and to describe the core elastoplastic constitutive model using this extended effective stress.…”

Section: Introductionmentioning

confidence: 97%

Method to Introduce the Cementation Effect into Existing Elastoplastic Constitutive Models for Soils

Yamada

Sakai

Nakano

et al. 2022

J. Geotech. Geoenviron. Eng.

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This study proposes a new method to introduce the cementation effect into existing elastoplastic constitutive models for soils. The mechanical properties of cement-treated soil are evaluated via element tests and compared with those of naturally deposited clay. The similarities and differences between cement-treated soils and naturally deposited clays are studied, focusing on two states, the undisturbed and remolded states. The effective stress for cement-treated soils incorporating an internal state variable representing the cementation effect is newly defined to describe the mechanical properties of cement-treated soils. Moreover, by applying this extended effective stress to the supersubloading yield surface (SYS) Cam-clay model, which is an elastoplastic model for soils based on the skeleton structure concept, the scope of this constitutive model is extended to include cement-treated soils. The cementation effect introduced by the proposed method allows reproducing the mechanical behavior of the cement-treated soil. Finally, a brittle behavior not described at the element level can be obtained, leading to a soil-water coupled finite deformation analysis incorporating the proposed constitutive model.

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Bounding Surface Constitutive Model for Cemented Sand under Monotonic Loading

Cited by 41 publications

References 27 publications

Macroscopic Stress-Strain Response and Strain-Localization Behavior of Biopolymer-Treated Soil

Macroscopic Stress-Strain Response and Strain-Localization Behavior of Biopolymer-Treated Soil

State-of-the-Art Review of Microbial-Induced Calcite Precipitation and Its Sustainability in Engineering Applications

Method to Introduce the Cementation Effect into Existing Elastoplastic Constitutive Models for Soils

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