Determination of depth-dependent undrained shear strength of structured marine clays based on large deformation finite element analysis of T-bar penetrations

Ke, Lijun; Gao, Yufeng; Fei, Kang; Gu, Yaotian; Ji, Jian

doi:10.1016/j.compgeo.2024.106758

Computers and Geotechnics

2024

DOI: 10.1016/j.compgeo.2024.106758

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Determination of depth-dependent undrained shear strength of structured marine clays based on large deformation finite element analysis of T-bar penetrations

Lijun Ke,

Yufeng Gao,

Kang Fei

et al.

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2024

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Cited by 2 publications

References 59 publications

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Investigating the Impact of Random Field Element Size on Soil Slope Reliability Analysis

Sun,

Guan,

Sun

et al. 2024

Applied Sciences

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The determination of the optimal random field element (RFE) size is crucial in soil slope reliability analysis as it governs the trade-off between precision in failure probability calculations and computational efficiency. Given the substantial computational burden associated with smaller RFE sizes, studies on their impact on slope failure probability are scarce. This research examines the influence of RFE size on failure probability and safety factor, employing the Karhunen–Loève expansion to generate random fields and integrating the simplified Bishop method with particle swarm optimization (PSO) to assess slope stability. Through Monte Carlo Simulation (MCS), this study investigates the effects of the ratio of slope height to RFE size (H/De) on slope reliability metrics across two illustrative cases. Results reveal a notable influence of H/De on the distribution of safety factors (Fs) and failure probability (PF), with overestimation observed at smaller H/De ratios. When H/De exceeds 10 for Example 1 and 15 for Example 2, the Fs distribution patterns in both scenarios stabilize significantly, displaying minimal variability. The PF of Example 1 and Example 2 decreases with the increase of H/De and remains basically unchanged when H/De exceeds 10 and 15, respectively. Consequently, a recommended H/De ratio of 20 is proposed based on the analyzed cases, facilitating accurate calculations while mitigating computational overhead.

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Investigating the Impact of Random Field Element Size on Soil Slope Reliability Analysis

Sun,

Guan,

Sun

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

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A Strain-Controlled Finite Strain Model for CRD Consolidation of Saturated Clays Considering Non-Linear Compression and Permeability Relationships

Wang,

Ke,

2024

Water

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Consolidation is the combined phenomenon of the compression and groundwater seepage of clay. Accurate evaluation of the consolidation characteristic is essential for the design, construction, and long-term stability of geotechnical structures. In this study, a strain-controlled non-linear finite strain model for constant rate-of-deformation (CRD) consolidation was developed for quickly and reliably predicting the consolidation behavior of clay soils. The model can account for any form of non-linear compression and permeability relationships, thus considering variations in the coefficient of consolidation. Being strain-controlled, it overcomes the limitations of stress-controlled models which require complex numerical iteration. The validity and accuracy of this model were verified through rigorous comparisons with both numerical simulations and experimental data. For normally consolidated soils, a non-linear e-lgσ′compression model was used instead of a linear compression model. For overconsolidated soils, the Harris function compression model was determined to be recommended to overcome the discontinuities in total stress and pore pressure caused by the traditional piecewise e-lgσ′ model. It was also found that determining the steady state of consolidation for normally consolidated soils should use the non-linear method, while the linear method is suggested to be adopted for overconsolidated soils.

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Determination of depth-dependent undrained shear strength of structured marine clays based on large deformation finite element analysis of T-bar penetrations

Cited by 2 publications

References 59 publications

Investigating the Impact of Random Field Element Size on Soil Slope Reliability Analysis

Investigating the Impact of Random Field Element Size on Soil Slope Reliability Analysis

A Strain-Controlled Finite Strain Model for CRD Consolidation of Saturated Clays Considering Non-Linear Compression and Permeability Relationships

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