On the use of different constitutive models in data assimilation for slope stability

Mohsan, Muhammad; Vossepoel, Femke C.

doi:10.1016/j.compgeo.2021.104332

Cited by 17 publications

(12 citation statements)

References 31 publications

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“…To calculate foundation settlement, various mathematical models are used. Let us consider two key models: the linear elastic-perfectly plastic Mohr-Coulomb (MC) model [28,29] and the Hardening Soil (HS) model [30][31][32].…”

Section: Soil Model Selectionmentioning

confidence: 99%

“…The major disadvantage of the MC model is the invariance of the deformation modulus over the entire stress range. The relationship between stresses and strains in the MC model is described by Hooke's law [28,29]:…”

Section: Soil Model Selectionmentioning

confidence: 99%

“…As for the MC model, Expression (2) and Table 1 show that its parameters can be determined on site. The authors of [28,36] note that the HS model produces better results than the MC model, in comparison with the results of on-site settlement measurements. However, the MC model still produces sufficient results and is widely used in Russia for preliminary calculations [36].…”

Section: Soil Model Selectionmentioning

confidence: 99%

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Assessing the State of Structural Foundations in Permafrost Regions by Means of Acoustic Testing

Syaskо

Shikhov

2022

Applied Sciences

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About 60% of the territory of the Russian Federation is covered by permafrost. Additionally, a large share of the country’s mineral and hydrocarbon deposits are located in the Arctic. Climate change that has been happening over the past few decades has had a serious impact on the conditions in which permafrost soils are found. Changes in temperatures in permafrost regions, along with the human impact from mining and processing, have led to an increase in accidents caused by the degradation of permafrost foundations. In this situation, timely detection of the degradation of permafrost foundations plays a pivotal role in ensuring the safe operation of buildings and structures. This article contains a theoretical review and describes the results of an experimental study of whether it is possible to use acoustic testing in solving problems associated with monitoring the state of permafrost foundations. In the course of the study, the relationships between the acoustic characteristics and the deformation and strength characteristics of permafrost soils were analysed. The results of the study made it possible to draw a preliminary conclusion that acoustic testing can be used to solve problems associated with condition monitoring of permafrost foundations.

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Section: Soil Model Selectionmentioning

confidence: 99%

Section: Soil Model Selectionmentioning

confidence: 99%

Section: Soil Model Selectionmentioning

confidence: 99%

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Assessing the State of Structural Foundations in Permafrost Regions by Means of Acoustic Testing

Syaskо

Shikhov

2022

Applied Sciences

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“…Mohr-Coulomb model is the most preferred model to simulate backfill materials, as it is simple to use. Moreover, it efficiently captures the stress-dependent failure conditions (Mohsan et al, 2021). However, it is not capable of capturing the hardening before failure, stress-dependent stiffness and nonlinear elasticity.…”

Section: Effect Of Materials Models On Wall Behaviormentioning

confidence: 99%

Performance evaluation of reinforced earth walls with sustainable backfills subjected to railway loading

Mandloi

Hegde²

2022

Front. Built Environ.

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The concept of using Reinforced Earth (RE) walls for rail corridors is gaining popularity. As of now, very few nations have successfully adopted the RE walls for Railway infrastructure. These structures require good quality granular materials like sand for backfilling. However, due to the scarcity of good quality natural sand, research efforts are being made to look for cost effective alternatives to sand in backfill applications. The present study examines the possibilities of using the two sustainable materials, namely steel slag and construction and demolition waste (CDW), as backfills in RE walls subjected to harmonic train-induced load. In total, 63 separate full-scale numerical models of RE walls have been analyzed to understand the wall behavior with sustainable backfills subjected to different train speeds. The backfill materials were simulated with three different material models, namely, linear elastic, Mohr-Coulomb and Hardening Soil, for comparison. The results showed that the RE wall behavior is highly frequency-dependent. RE walls with steel slag and CDW backfills have shown 25% and 12% lesser deformations, respectively as compared to the sand backfill. Furthermore, reinforcement tensile forces in walls with sustainable backfills were found to be comparable to those of sand. The maximum deformation of the wall was observed when the fill materials were simulated with the Hardening Soil model. In overall, satisfactory performance of the RE wall was observed in the presence of sustainable backfill materials under Railway loading.

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“…5a. The modified Mohr-Coulomb model, otherwise known as the hardening soil model (hereinafter referred to as the MCC model) [12][13][14][15], allows you to separately specify the unloading elastic modulus E ur , which is assumed to be equal to three times the value of the secant elastic modulus by default: E ur = 3⋅E 50 , Fig. 5b.…”

Section: Vol 18 Issue 1 185-194mentioning

confidence: 99%

Additional Pressure Distribution on Subway Tunnels from Ground Construction

Sokornov

Konkov

Novikov

et al. 2022

Civil and Environmental Engineering

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In the proposed research there were evaluated the factors influencing the distribution of additional pressure from ground construction on the linings of the subway tunnels. In recent years, the Department of Tunnels and Subways of the Emperor Alexander I St. Petersburg State Transport University has provided scientific support for many capital construction projects with geotechnical calculations of the buildings under construction impact on subway structures, both using analytical methods and mathematical modeling. The existing analytical methods allow us to evaluate the change in the additional pressure in the ground massive without taking into account the tunnel construction, while in reality the tunnel construction significantly changes the stress-strain state of the ground massive in the vicinity of the excavation. This factor was considered as the most significant, and together with it, there were evaluated the influence of the tunneling method and the influence of the applied geomechanical soil model on the calculation results.

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On the use of different constitutive models in data assimilation for slope stability

Cited by 17 publications

References 31 publications

Assessing the State of Structural Foundations in Permafrost Regions by Means of Acoustic Testing

Assessing the State of Structural Foundations in Permafrost Regions by Means of Acoustic Testing

Performance evaluation of reinforced earth walls with sustainable backfills subjected to railway loading

Additional Pressure Distribution on Subway Tunnels from Ground Construction

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