Article
Engineering, Geological
L. V. Doan, B. M. Lehane
Summary: The paper presents a relationship for CPT data in young normally consolidated soils that combines end resistance and friction sleeve data, which can assist assessment of soil type and CPT parameters. This relationship also allows judgements to be made in relation to likely levels of under-consolidation, structure and over-consolidation in any given soil deposit by combining observations from both controlled laboratory conditions and field tests.
Article
Chemistry, Physical
John de Bono, Glenn McDowell
Summary: The mechanical behavior of sands and clays under normal compression is similar despite the differences in inter-particle interactions. However, the hysteretic behavior of clay is very different, exhibiting springy hysteresis loops and ratchetting volumetric compaction.
APPLIED CLAY SCIENCE
(2023)
Article
Computer Science, Interdisciplinary Applications
Radhavi A. Samarakoon, John S. McCartney
Summary: This paper focuses on the thermo-hydro-mechanical behavior of clay surrounding a thermal drain. A new constitutive model is proposed to better predict the thermal volume change of clay. Numerical simulation and experimental validation show that using a thermal drain can reduce the required surcharge and increase the rate of consolidation.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Geological
Ibrahim Lashin, Michael Ghali, Mahmoud N. Hussien, Mohamed Chekired, Mourad Karray
Summary: The study experimentally measured the shear wave velocities of different granular soils and recorded the development of oedometer constrained modulus related to relative density and void ratio. By analyzing the correlations, soil deformation behavior can be predicted and applied in geotechnical engineering design.
CANADIAN GEOTECHNICAL JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Antonio Mario Federico
Summary: This paper focuses on predicting the at-rest earth pressure coefficient K-0 for normally consolidated soils, deriving an empirical equation based on the mobilised angle Φ'mob of shearing resistance. It suggests a possible link between the shearing resistance angle Φ' and its mobilised proportion in the one-dimensional virgin compression process through the Golden Ratio τ = 1.618. The resulting empirical equation shows better predictive capability than other existing K-0 equations and indicates a correlation between the Poisson's ratio v and Φ' for normally consolidated soils, needing experimental validation.
ITALIAN JOURNAL OF ENGINEERING GEOLOGY AND ENVIRONMENT
(2021)
Article
Engineering, Geological
Talia S. da Silva Burke, Mohammed Z. E. B. Elshafie
Summary: Understanding soil arching is crucial for predicting soil behavior, and centrifuge tests can visualize deformation mechanisms to enhance accurate prediction of load-displacement curves.
Article
Engineering, Geological
Adel Hanna, Yara Obeid
Summary: Collapsible soils are unsaturated soils that have high strength when dry and experience significant volume reduction when inundated. Dealing with these soils has become unavoidable due to the growth in construction and urban development. Retaining walls and earth pressures dominate the design of structures affected by collapsible soils. Numerical models and finite element technique are used to simulate walls retaining these soils, while unsaturated soil mechanics theory is employed to evaluate soil parameters. Design charts are provided to estimate coefficients of earth pressures for different collapse potentials, over-consolidation ratios, and degrees of saturation.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2023)
Article
Engineering, Geological
Jongchan Kim, Yongkoo Seol, Sheng Dai
Summary: This study investigates the coefficient of earth pressure at rest K-0 in tetrahydrofuran hydrate-bearing sands, revealing that it is mainly governed by hydrate cementation at low stress and by soil particle skeleton at high stress. Estimations of K-0 based on the Poisson's ratio fail to recognize plastic deformation and decementation due to loading.
Article
Mathematics, Interdisciplinary Applications
Javad Ghorbani, David W. Airey
Summary: This paper presents a constitutive model for multiphase granular soils that captures features such as wetting and drying processes, anisotropy, and changing compressibility by combining isotropic and kinematic hardening. The model ensures smooth transitions between saturated and unsaturated states and is implemented numerically with smoothing techniques for enhanced performance. The computational framework also includes error control and sub-stepping techniques for additional control over accuracy and speed.
COMPUTATIONAL MECHANICS
(2021)
Article
Chemistry, Multidisciplinary
Shenggui Deng, Yan Zhang, Jun Han, Kaidi Wang, Zhuangcai Tian, Tao Liu
Summary: This study investigates the effects of OCR on the mechanical properties and in situ test results of silty clay through numerical analysis. It proposes an inversion method based on piezocone penetration tests to estimate the strength and over-consolidation ratio of the silty clay, which is of great importance for soil parameter inversion in the Yellow River Delta region.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Geological
Maozhu Peng, Sen Mei, Zhen-Yu Yin
Summary: This study examines the effects of rotational hardening and associated/nonassociated flow on modeling the undrained shear strength of K-0-consolidated clays. The results show that only the MCC model with rotational hardening and nonassociated flow (RNMCC) can reasonably simulate the undrained shear strength.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2023)
Article
Engineering, Multidisciplinary
Ali Golchin, Philip James Vardon, Michael Anthony Hicks
Summary: This paper presents a new thermo-mechanical constitutive model capable of predicting the behavior of fine-grained soils. The model incorporates thermo-elasticity into the energy potential and identifies the thermo-mechanical mechanisms using a proposed dissipation potential. The model's performance is validated through experiments.
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2022)
Article
Mechanics
Mukul Saxena, Saikat Sarkar, Debasish Roy
Summary: Due to their high strength to weight ratio, durability, corrosion resistance, and design flexibility, composite materials are widely used in engineering applications. However, the complex failure modes of these materials, arising from their heterogeneous microstructure details, pose challenges in accurately predicting their non-local and non-linear behavior preceding failure. In this work, a novel non-local variant of the deformation gradient is proposed, along with a constitutive model, to incorporate microstructural information for a faithful reproduction of the macroscopic response leading to failure. The model is implemented to study fracture/damage and size effect in concrete, showing close conformity with experimental data and accurately simulating complex phenomena like crack propagation and branching with reduced computational overhead.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Engineering, Geological
Gustav Grimstad, Michael Long, Davood Dadrasajirlou, Seyed Ali Ghoreishian Amiri
Summary: This paper discusses the time evolution of K-0 in clay within the framework of hyper-viscoplasticity, highlighting the lack of data on the influence of creep and the existing models predicting minimal changes in K-0 with time, contrasting with practitioners' opinions of potential increases over time.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2021)
Article
Thermodynamics
H. E. Schulz
Summary: This paper presents a second order differential equation for the energy dissipation rate of turbulence and explains the derivation procedure. The obtained governing equation is a Euler equation, which integration naturally leads to power laws for the energy dissipation rate as a function of the wavenumber. This result is extended to the energy spectrum of turbulence. Power laws are obtained for different cases of real and complex roots. The differential equation is derived from already consolidated empirical and semi-empirical information on turbulence and is analogous to the Thermodynamics equation of thermal radiation. It is also shown that parameters of turbulence like length and velocity scales may be related to this formulation.
JOURNAL OF APPLIED FLUID MECHANICS
(2022)
Article
Engineering, Geological
Mohamed Rouainia, Gaetano Elia, Stylianos Panayides, Peter Scott
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2017)
Article
Engineering, Geological
Gaetano Elia, Federica Cotecchia, Giuseppe Pedone, Jean Vaunat, Philip J. Vardon, Carlos Pereira, Sarah M. Springman, Mohamed Rouainia, John Van Esch, Eugeniusz Koda, Josif Josifovski, Alessandra Nocilla, Amin Askarinejad, Ross Stirling, Peter Helm, Piernicola Lollino, Piotr Osinski
QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY
(2017)
Article
Engineering, Geological
Gaetano Elia, Mohamed Rouainia, Dimitrios Karofyllakis, Yusuf Guzel
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2017)
Article
Engineering, Geological
Lowell Tan Cabangon, Gaetano Elia, Mohamed Rouainia
Article
Computer Science, Interdisciplinary Applications
Yusuf Guzel, Mohamed Rouainia, Gaetano Elia
COMPUTERS AND GEOTECHNICS
(2020)
Editorial Material
Engineering, Geological
Paul J. Vardanega, Gaetano Elia, Kai Yao
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2021)
Article
Engineering, Geological
D. Simpson, M. Rouainia, G. Elia
Summary: The construction industry in Abu Dhabi is thriving, with ambitious structures, but the geological understanding of the region is relatively poor, leading to overly conservative foundation designs. A calcareous mudstone studied in this paper exhibits characteristics between soil and rock, requiring a testing approach that combines methods from both disciplines.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Engineering, Geological
Annamaria di Lernia, Federica Cotecchia, Gaetano Elia, Vito Tagarelli, Francesca Santaloia, Giuseppe Palladino
Summary: This paper presents the results of a pilot study conducted in Foggia, Italy, which investigates the effects of rainfall water infiltration and the presence of a water-bearing aquifer on the stability of clayey slopes. The study used numerical simulations and limit equilibrium analyses to examine the impact of climatic and hydraulic factors on seepage processes and slope stability.
ENGINEERING GEOLOGY
(2022)
Review
Engineering, Geological
Gaetano Elia, Mohamed Rouainia
Summary: This paper introduces the application of nonlinear time domain numerical approaches in geotechnical earthquake engineering, focusing on the dynamic finite element method. The key factors governing its predictive capabilities are discussed, providing protocols for evaluating the performance of critical geotechnical infrastructures and promoting familiarity of advanced nonlinear soil dynamic analysis among geotechnical practitioners.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Yusuf Guzel, Gaetano Elia, Mohamed Rouainia, Gaetano Falcone
Summary: The selection of input motions at the seismic bedrock is crucial for estimating ground shaking. However, the effect of input motion scaling strategy on structural response is commonly studied without considering the presence of the soil deposit. In this study, different soft soil deposits were modeled using a nonlinear constitutive model, and more than 300 ground response analyses were conducted. The results showed that using an advanced elasto-plastic soil constitutive model accounted for nonlinear ground response effects, different scaling strategies led to comparable mean values of amplification factors, and variability of amplification factors was significantly reduced when the scaling strategy was compatible with the target spectrum over a specified period range.
Article
Geosciences, Multidisciplinary
Gaetano Falcone, Gaetano Elia, Annamaria di Lernia
Summary: This paper describes the preliminary results of numerical analysis on the impact of seismic wave amplification on slope susceptibility. The results show that the thickness of the shear band greatly influences the amplification factors at the ground surface. The highest amplification factors occur at longer periods for gentle slopes with thick shear bands, while for steep slopes, the highest level of amplification is achieved at intermediate periods. In addition, the vertical component of acceleration can be considerably amplified, especially for steep topography.
Article
Computer Science, Interdisciplinary Applications
Lowell Tan Cabangon, Gaetano Elia, Mohamed Rouainia, Suraparb Keawsawasvong
Summary: Current research heavily relies on 2D modelling to predict tunnel seismic behavior, which may lead to inaccurate predictions due to the three-dimensional effects and soil-structure interaction. Natural soils often exhibit stiffness degradation during strong earthquakes, which cannot be captured by simple constitutive models. This paper presents advanced 3D numerical simulations that consider soil structure degradation, highlighting the significance of accurately predicting tunnel lining forces under multi-directional seismic loading.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Geological
G. Elia, M. Rouainia, A. di Lernia, A. F. D'Oria
Summary: This study examines the dynamic behavior of soils through a posteriori analysis, estimating the variations in soil shear modulus and material damping characteristics under different seismic intensities using shear stress-strain histories. The results indicate that kinematic hardening models are effective in capturing wave propagation during intense seismic loading, despite the typically low frequency of occurrence of the largest closed cycles.
GEOTECHNIQUE LETTERS
(2021)
Article
Construction & Building Technology
Valeria Leggieri, Annamaria di Lernia, Gaetano Elia, Domenico Raffaele, Giuseppina Uva
Summary: The paper uses a numerical approach to investigate the effects of vibrations on reinforced concrete buildings in dolomitic rocks induced by excavation works in an urban area in southern Italy. It suggests that a mitigation strategy can significantly reduce the vibrations induced by excavation processes on existing buildings.
Article
Mechanics
Antonio Mario Federico, Osvaldo Bottiglieri, Francesco Cafaro, Gaetano Elia
STUDIA GEOTECHNICA ET MECHANICA
(2020)
Article
Computer Science, Interdisciplinary Applications
Yinghao Deng, Yang Xia, Di Wang, Yan Jin
Summary: This study investigates the mechanism of hydraulic fracture propagation in laminated shale, develops a numerical solver, and validates the effectiveness of the method through simulation experiments. The study also examines the influence of the interaction between hydraulic fractures and weak interfaces on the mechanical properties of shale.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Zhichao Zhang, Mingfei Feng, Guangshuo Zhou, Zhenglong Xu
Summary: A thermodynamic constitutive model for structured and destructured clays is proposed in this paper. The model includes state-dependent relations of hyperelasticity and plasticity without the concept of yielding surface. The proposed model captures the couplings between elasticity and plasticity and the effects of bonding structure.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Deze Yang, Xihua Chu
Summary: Creep and stress relaxation behaviors in granular materials are influenced by the time-dependent changes in their microstructure, with particle shape playing a significant role. However, the effects of particle shape on these behaviors are still not well understood. In this study, 3D DEM models incorporating the rate process theory and superellipsoids are used to simulate creep and stress relaxation in granular samples with different aspect ratios and blockiness. The results show that both aspect ratio and blockiness have a significant influence on creep and stress relaxation, with aspect ratio affecting creep through contact force ratio and blockiness affecting stress relaxation through variation in normal contact force anisotropy. These findings provide insights into the effects of particle shape on creep and stress relaxation in granular assemblies.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shahab Amanat, Kourosh Gholami, Reza Rafiee-Dehkharghani, Dipanshu Bansal
Summary: This paper investigates the optimal design of wave barriers using the modified non-dominated sorting genetic algorithm-II (NSGA-II) and the Bloch-Floquet theory. The aim is to find the optimal design of plane wave barriers with a wide bandgap at a low-frequency range and low construction cost. The study develops a modified NSGA-II algorithm to determine the optimal arrangement of concrete in wave barrier unit cells. The performance of the optimal barriers is examined through finite element simulation and their efficacy in attenuating plane S-waves is verified.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Yanlin Su, Guoqing Cai, Fengjie Yin, Yepeng Shan, Annan Zhou
Summary: This paper presents a novel elastic-viscoplastic constitutive model that takes into account particle breakage to reproduce the time-dependent behavior of coarse-grained soil. The model integrates the Unified Hardening (UH) model, the elastic-viscoplastic (EVP) model, and the overstress theory. The relationship between particle breakage and loading rate is established, and state variables associated with the critical state of coarse-grained soil are derived to consider both time and particle breakage. A three-dimensional elastic-viscoplastic constitutive model is constructed by combining a one-dimensional viscoplastic hardening parameter with a secondary consolidation coefficient considering particle breakage. The proposed model requires 19 parameters and effectively describes the influence of time-dependency and particle breakage on the shear, dilatancy, and compression behaviors of coarse-grained soil with different confining pressures or initial void ratios. Experimental data comparisons validate the model's ability to replicate the time-dependent behavior of coarse-grained soil.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shichao Zhang, Yaqiong Wang, Qidong Gao, Xiaobo Ma, Haixiao Zhou, Zhifeng Wang
Summary: Accurately evaluating and predicting ground settlement during tunnel excavation is essential for ensuring tunnel stability. This study conducted a probabilistic analysis of ground settlement under uncertain soil properties. The results demonstrate that spatially variable soils significantly influence the ground settlement in the vertical direction.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Xu Zhang, Bin Luo, Youjun Xu, Zhiwen Yang
Summary: This paper presents an analytical solution for horizontal displacements induced by small radius curve shield tunneling. The formula is derived based on the image method and Mindlin solution, considering additional thrust, frictional resistance, ground loss, and grouting pressure. The solution is validated with on-site data, demonstrating its reliability and providing a new approach for predicting and controlling stratum horizontal displacements in curve shield tunneling. The study finds that ground loss has the most significant influence on displacements, and soil closer to the tunnel exhibits larger horizontal displacements.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jian-Hong Wan, Ali Zaoui
Summary: Ground vibrations during earthquakes can cause soil strength loss and structural damage. Rubber-soil mixtures (RSM) have shown promise in reducing residual ground deformation. This study used molecular dynamics simulations to investigate the friction behavior of the rubber-clay interface in RSM systems. The results revealed a direct correlation between normal stress and friction force, with denser soil systems exhibiting higher friction forces.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Hongying Wang, Qiang Zhang, Peinan Wu, Yanjing Li, Lijun Han, Guilei Han
Summary: In addition to the Mohr-Coulomb and Hoek-Brown criteria, other nonlinear functions are used to describe the plastic response of rock mass. This paper derived the equivalent cohesive strength, frictional angle, and dilatancy angle for nonlinear yield and plastic flow rock masses. The solution for a circular tunnel in any nonlinear yield and plastic flow rock masses was derived and verified using a numerical procedure. The analysis of strain-softening rock masses under two assumed nonlinear yield criteria was also studied.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Zhijun Wu, You Wu, Lei Weng, Mengyi Li, Zhiyang Wang, Zhaofei Chu
Summary: This study proposed a machine learning approach to predict the uniaxial compression strength (UCS) and elastic modulus (E) of rocks. By measuring meso-mechanical parameters and developing grain-based models, a database with 225 groups of data was established for prediction models. The optimized kernel ridge regression (KRR) and gaussian process regression (GPR) models achieved excellent performance in predicting UCS and E.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Mingjun Zhou, Zhenming Shi, Chong Peng, Ming Peng, Kahlil Fredrick E. Cui, Bo Li, Limin Zhang, Gordon G. D. Zhou
Summary: In this paper, the erosion and deposition processes during overtopping dam breaching are simulated using a novel method (ED-SPH). The proposed model is able to capture the complex behaviors of dam soil erosion, entrainment, and depositions. Soil deposition hinders particle movement and reduces water velocity at the water-soil interface.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
C. Chavez-Negrete, F. J. Dominguez-Mota, R. Roman-Gutierrez
Summary: To accurately simulate groundwater flow in porous layered media, it is important to consider all environmental factors and use a generalized finite differences scheme as a meshless method for spatial discretization. This approach ensures robustness and accuracy of the numerical solution.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Shuairun Zhu, Lulu Zhang, Lizhou Wu, Lin Tan, Haolong Chen
Summary: This paper investigates the effectiveness of the cascadic multigrid method applied to the improved Picard iteration method for solving nonlinear problems in deforming variably saturated porous media. Two improved Picard iteration methods are proposed, and their effectiveness is verified through numerical examples. The results show that the improved methods have faster convergence and higher computational efficiency compared to the classical method.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Yuan Cao, Yan-Guo Zhou, Kyohei Ueda, Yun-Min Chen
Summary: Investigated shear stress responses of enclosed soil in deep soil mixing (DSM) grid-improved ground, and revealed the characteristics of the waist effect and mathematical model for shear stress reduction ratio.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jinfan Chen, Zhihong Zhao, Jintong Zhang
Summary: This study develops data-driven criteria to estimate the peak shear strength (PSS) of rock fractures, considering the effects of surface roughness features. A high-quality dataset is created using particle-based discrete element method and diamond-square algorithm. Tree-based models and convolutional neural network are trained to predict the PSS of rock fractures, and their reliability is verified using experimental data.
COMPUTERS AND GEOTECHNICS
(2024)