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Peridynamic modeling of seepage in multiscale fractured rigid porous media Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-03-22 Zhuang Cai, Heng Zhang, Zhiyuan Li, Dan Huang
The numerical simulation of seepage in fractured porous media holds significant relevance for subsurface energy development. The presence of fractures at various scales profoundly influences the hydraulic properties of porous media during seepage. A peridynamic (PD)‐based frame is proposed for the seepage problem analysis of multiscale fractured porous media, in which micro‐fractures are implicitly
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Hydro‐mechanically coupled CEL analyses with effective contact stresses Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-03-20 Patrick Staubach
The coupled Eulerian–Lagrangian (CEL) method implemented in Abaqus is an established tool for modelling large deformations in numerical geomechanics. As shown in previous work, it can be extended to a hydro‐mechanically coupled scheme by exploiting the similarity of the heat balance equation to the mass balance equation of fluids. However, the distinction between effective and total contact stresses
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Multi‐porous extension of anisotropic poroelasticity: Linkage with micromechanics Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-03-19 Filip P. Adamus, David Healy, Philip G. Meredith, Thomas M. Mitchell
We attempt to formalise the relationship between the poroelasticity theory and the effective medium theory of micromechanics. The assumptions of these two approaches vary, but both can be linked by considering the undrained response of a material; and that is the main focus of the paper. To analyse the linkage between poroelasticity and micromechanics, we do not limit ourselves to the original theory
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Multi‐porous extension of anisotropic poroelasticity: Consolidation and related coefficients Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-03-19 Filip P. Adamus, David Healy, Philip G. Meredith, Thomas M. Mitchell, Ashley Stanton‐Yonge
We propose the generalization of the anisotropic poroelasticity theory. At a large scale, a medium is viewed as quasi‐static, which is the original assumption of Biot. At a smaller scale, we distinguish different sets of pores or fractures that are characterized by various fluid pressures, which is the original poroelastic extension of Aifantis. In consequence, both instantaneous and time‐dependent
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A MPM Lagrangian‐Eulerian hydrocode for simulating buried explosions in transversely isotropic geomaterials Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-03-14 Mian Xiao, WaiChing Sun
Shock waves in geological materials are characterized by a sudden release of rapidly expanding gas, liquid, and solid particles. These shock waves may occur due to explosive volcanic eruptions or be artificially triggered. In fact, underground explosions have often been used as an engineering solution for large‐scale excavation, stimulating oil and gas recovery, creating cavities for underground waste
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Analytical solution for buried pipeline deformation induced by normal and reverse fault considering structural joint influence Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-03-13 Zhiguo Zhang, Jiawei Feng, Zhengguo Zhu, Qihua Zhao, Yutao Pan
Previous studies take less account of analytical solution analysis for buried pipeline under the action of active fault. Furthermore, current theoretical studies of fault‐pipeline interactions generally treat the structure as continuous pipeline, with less attention given to the effect of joints. This paper provides an analytical method to estimate the deformation and internal force of jointed pipelines
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Revisiting the face stability of rock tunnels in the Hoek–Brown strength criterion with tension cutoff Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-03-11 Junhao Zhong, Siau Chen Chian, Hui Chen, Chuantan Hou, Xiaoli Yang
In this work, the three‐dimensional stability of deep tunnel faces is evaluated in rock masses characterized by the generalized Hoek–Brown (H–B) criterion from the perspective of the limit analysis theorem. Considering that underground engineering is gradually developing towards larger burial depths and larger sizes, and the tensile strength of rocks is usually overestimated, the concept of tension
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Cover Image, Volume 48, Issue 5 Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-03-07 Jiujiang Wu, Yi Zhang, Yan Li, Hua Wen, Lijuan Wang
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Impact of soft minerals on crack propagation in crystalline rocks under uniaxial compression: A grain‐based numerical investigation Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-03-06 Yu Zhou, Wenjun Lv, Bo Li, Qinyuan Liang
Varying external conditions in the metallogenetic process of crystalline rocks contribute to the complex mineral and textural characteristics, rendering the mechanical properties highly heterogeneous at the mineral scale. This research focused on the influences of minerals with relatively low strength and stiffness (soft minerals) in crystalline rocks on their cracking behavior. A particle‐based discrete
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The consolidation behavior of layered fractional viscoelastic soils considering groundwater Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-03-06 Zhi Yong Ai, Zi Kun Ye, Ming Jing Jiang, Qing Song Lu
This paper investigates the consolidation behavior of multi‐layered viscoelastic soils considering groundwater. First, the fractional Merchant viscoelastic model is introduced to describe the behavior of multi‐layered viscoelastic soils considering groundwater. Later, the governing equations are extended to a viscoelastic medium by virtue of the elastic‐viscoelastic corresponding principle in the Laplace–Hankel
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Analytical solution for one‐dimensional thaw consolidation model with double moving boundaries Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-03-02 Tao Han, Yang Zhou, Guang‐si Zhao, Meng‐meng Lu
A one‐dimensional thaw consolidation model considering the density change from pore ice to pore water is established, and the model describes a special type of moving boundary problem with double moving boundaries. An analytical solution for the model under a time‐varying external load is developed using certain form of superposition principle and the similarity type of general solution. Some known
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Interpreting correlations in stress‐dependent permeability, porosity, and compressibility of rocks: A viewpoint from finite strain theory Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-03-02 Luyu Wang, Yanjun Zhang
Characteristics of stress‐dependent properties of rocks are commonly described by empirical laws. It is crucial to establish a universal law that connects rock properties with stress. The present study focuses on exploring the correlations among permeability, porosity, and compressibility observed in experiments. To achieve this, we propose a novel finite strain‐based dual‐component (FS‐DC) model,
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A nonlinear optimization method for calibration of large‐scale deep cement mixing in very soft clay deep excavation Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-28 Thanh Sang To, Hoang Le Minh, Thien Quoc Huynh, Samir Khatir, Magd Abdel Wahab, Thanh Cuong‐Le
This work proposes a novel technique to conduct back‐analysis of lateral displacement of deep cement mixing (DCM) columns in deep excavation construction. For the first time, we propose a process to investigate both soil and underground structure end‐to‐end automatically. The novel technique is a complex combination of three crucial factors: (1) a nature‐inspired optimization algorithm (O), (2) a three‐dimensional
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Semi-analytical solution for double-layered elliptical cylindrical foundation model improved by prefabricated vertical drains Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-15 Xudong Zhao, Nanning Guo, Wenzhao Cao, Wenhui Gong, Yang Liu
This work proposes a semi-analytical solution for a double-layered elliptical cylindrical soft foundation improved by prefabricated vertical drains. The governing equations, continuity conditions are boundary conditions in the elliptical cylindrical system are introduced first. The Laplace transform is employed to convert the time variable t in partial differential equations into the Laplace complex
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Rheological consolidation analysis of saturated clay ground under cyclic loading based on the fractional order Kelvin model Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-15 Lian Wang, Hui Chen, Shengwei Liu, Yunyan Yu
Based on Biot porous medium theory, considering the coupled reaction of soil skeleton rheology and pore pressure dissipation, the present work investigates the dynamic consolidation characteristics of saturated clay ground under cyclic loading. First, the rheological behavior of the soil skeleton was described by the fractional order Kelvin model. The dynamic consolidation governing equations for the
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Simplified method for evaluating tunnel response induced by a new tunnel excavation underneath Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-15 Guohui Feng, Changjie Xu, Zhi Ding, Luju Liang, Yujie Li, Minliang Chi
To estimate the tunnel response induced by a new tunnel excavation underneath, theoretical solutions are proposed in this study. The overlying tunnel is idealized as an infinite Timoshenko beam resting on the Kerr foundation model, then the vertical force balance equation is established. The unloading stress can be expressed as Fourier cosine series and a theoretical solution can be derived. The effectiveness
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A novel unresolved/semi-resolved CFD-DEM coupling method with dynamic unstructured mesh Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-15 Jin-Hui He, Ming-Guang Li, Jin-Jian Chen
The greatest challenge when performing large deformation simulations using the CFD-DEM coupling method lies in the dynamical update of the fluid meshes. To address this problem, a novel CFD-DEM coupling method integrated with the dynamic unstructured grid is proposed in this work. The mesh initialization and reconstruction are performed by the Constrained Delaunay triangulation (CDT) implemented by
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Slope stability analysis with a hypoplastic constitutive model: Investigating a stochastic anisotropy model and a hydro-mechanical coupled simulation Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-15 Yang Xue, Fasheng Miao, Shun Wang, Yang Tang, Yiping Wu, Daniel Dias
A reliable constitutive model is essential for accurately predicting slope deformation in numerical analysis, which includes assessing slope stability as an integral component. However, calculating slope stability in numerical models can be challenging due to complex boundary conditions and advanced constitutive models, especially when probabilistic and hydro-mechanical coupled simulations are required
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Block preconditioning strategies for generalized continuum models with micropolar and nonlocal damage formulations Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-20 Nasser Alkmim, Peter Gamnitzer, Matthias Neuner, Günter Hofstetter
In this work, preconditioning strategies are developed in the context of generalized continuum formulations used to regularize multifield models for simulating localized failure of quasi‐brittle materials. Specifically, a micropolar continuum extended by a nonlocal damage formulation is considered for regularizing both, shear dominated failure and tensile cracking. For such models, additional microrotation
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Analyzing cyclic shear behavior at the sand–rough concrete interface: An experimental and DEM study across varying displacement amplitudes Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-20 Shixun Zhang, Feiyu Liu, Weixiang Zeng, Mengjie Ying
Pile foundations frequently endure dynamic loads, necessitating an in‐depth examination of the cyclic shear properties at the pile–soil interface. This study involved a series of cyclic direct shear (CDS) tests conducted on sand and concrete with irregular surface, utilizing varying displacement amplitudes (1, 3, 6, and 10 mm) and joint roughness coefficients (0.4, 5.8, 9.5, 12.8, and 16.7). Discrete
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Modeling and coupling analysis of enhanced coalbed methane recovery by gas injection Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-20 Junxiang Zhang, Yanling Jiang, Bo Li, Junjie Guo, Weiyong Lu, Lina Qu
Enhanced coalbed methane (ECBM) recovery by gas injection is regarded as a feasible method for ECBM recovery. To investigate the mechanism of CH4 displacement by N2 injection, a series of physical experiments were conducted in the laboratory under different N2 injection pressures. The experimental results showed a continuous increase in the N2 volume fraction and a decrease in the CH4 volume fraction
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Analytical solution for consolidation of unsaturated composite foundation improved by permeable and impermeable columns considering depth‐dependent initial stress Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-19 Aifang Qin, Yuxiang Peng, Jiaming Gong, Lianghua Jiang
The combination of permeable and impermeable columns is commonly employed to enhance the stability of natural ground and expedite the consolidation process while effectively reducing foundation settlement. This study presents a comprehensive investigation of the consolidation characteristics of unsaturated composite foundations (USCF) using various methods. Firstly, a mathematical model is developed
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Cover Image, Volume 48, Issue 4 Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-13 Kejie Zhai, Hongyuan Fang, Niannian Wang, Bin Li, Jiaxiu Dong, Binghan Xue
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A computational dual-porosity approach for the coupled hydro-mechanical analysis of fractured porous media Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-14 Amir R. Khoei, Mahtab Taghvaei
Dual-porosity simulation is one of the most used and efficient approaches in modeling fractured porous media. The performance of this approach is highly dependent on the accuracy of the definition of matrix-fracture transfer shape factor. In this paper, a two-step computational algorithm is developed to enhance the accuracy of the dual-porosity method in modeling large-scale deformable porous media
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Multiscale modeling of granular dynamics on flowslide triggering and runout Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-13 Ming Yang, Giuseppe Buscarnera
A hierarchical multiscale modeling framework is proposed to simulate flowslide triggering and runout. It couples a system-scale sliding-consolidation model (SCM) resolving hydro-mechanical feedbacks within a flowslide with a local-scale solver based on the discrete element method (DEM) replicating the sand deformation response in the liquefied regime. This coupling allows for the simulation of a seamless
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3D analytical modeling of moving-loading induced pile-group behavior in stratified cross-anisotropic poroelastic water-saturated soils based on two stage theory Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-12 Shuai Yang, Mincai Jia
The aim of this paper is to propose a two-stage theory-based analytical method for the dynamic performance of pile groups in layered poroelastic saturated cross-anisotropic soils induced by moving loadings. Among them, the free-field vibrational analysis of saturated soils is performed by the analytical element-layer approach (ALEA) and Fourier transformation. Based on the free-field response, the
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Identification of geotechnical units in soil exploration through principal component analysis and clustering Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-12 Oscar San Roman Iturbide, Eduardo Botero Jaramillo
Obtaining accurate information on soil characteristics is essential for large-scale construction projects. Geotechnical exploration methods are commonly used to obtain information on soil characteristics. However, integrating the characteristics obtained through different exploration methods can be challenging. To address this problem, this study proposes the use of Principal Component Analysis (PCA)
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A triple-microstructure hydro-mechanical constitutive damage model for compacted MX80 bentonite pellet/powder mixture Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-09 Jin-Wen Yang, Yu-jun Cui, Nadia Mokni, Hao Wang
A triple-microstructure hydro-mechanical constitutive damage model was proposed to describe the hydro-mechanical behaviour of MX80 bentonite pellet/powder mixture, based on the results from a series of suction-controlled oedometer tests and microstructure observations. Emphasis was put on the pellet damage behaviour. The model parameters were determined essentially based on these results. The model
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Semi-analytical solution for ultimate bearing capacity of smooth and rough circular foundations on rock considering three-dimensional strength Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-06 Haohua Chen, Hehua Zhu, Lianyang Zhang
This paper proposes a semi-analytical solution for the ultimate bearing capacity qu of both smooth and rough circular shallow foundations on rock mass. Specifically, a three-dimensional (3D) Hoek–Brown (HB) is adopted, in conjunction with equilibrium equations under axisymmetric conditions, to derive the governing equations. The method of characteristics is utilized to solve the stress and failure
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An investigation of fracture modes around a spherical cavity for understanding outburst propagation mechanism Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-02-01 Jingyu Shi, Qingdong Qu, Baotang Shen
Outburst of coal and gas is a major hazard in underground coal mining where coal seam gas content/pressure is high. A cone-shaped cavity is often observed in the coal seam after bursting, implying the likely mechanical structure being formed during outburst propagation. Although the mechanism for outburst initiation and propagation is very complex, mining-induced fracturing and damage of the coal material
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A precise modeling method of three-dimensional discrete fracture network based on rectangular joint model Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-31 Jingyu Kang, Xiaodong Fu, Qian Sheng, Jian Chen, Kai Wu, Xing Wang
As the weak structure and main seepage channel of rock mass, the discrete fracture network (DFN) has a significant influence on the physical and mechanical properties of rock mass. In this paper, based on the rectangular joint model, two algorithms are proposed to realize the precise modeling of the DFN in any polyhedron. First, the equivalence of DFN modeling with the rectangular joint model and the
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A new cube movement test for verification of simulations of contact processes of blocks of different size in geological hazards Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-28 Xinquan Wang, Chun Feng, Olaf Lahayne, Yiming Zhang, Herbert A. Mang, Bernhard L. A. Pichler
In many geological hazards, such as landslides, a large number of irregular blocks start moving. Their interaction on the way down renders prediction of disaster scopes difficult. To study this process and to provide a novel method for validation and calibration of numerical tools for its simulation, a cube movement test is designed. The goal of this research is to obtain patterns of movement of cubes
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Variation of negative vacuum pressure in vertical drains with time and depth under variable well resistance Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-26 Chuanxun Li, Ziwei Guo, Peng Wang
Most solutions for the large strain nonlinear consolidation of soils with vertical drains are based on the assumption that the negative vacuum pressure only depends on the depth. In response to the shortcomings of this assumption, a large strain nonlinear consolidation model of soils with vertical drains under vacuum preloading is developed by considering the time-and depth-dependent well resistance
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Study on rock block seismic sliding using three-dimensional discontinuous deformation analysis Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-24 Xinyang Lv, Youjun Ning, Dayong Chen, Kesong Ni
The seismic sliding of rock masses is an important phenomenon that is widely involved in earthquake geological hazards. Practical seismic sliding is a three-dimensional problem, namely, the seismic loads may act in any direction and the rock masses may move in an arbitrary direction relative to the sliding plane. In the present work, the functions of two different seismic loading methods, that is,
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Rock fracture propagation in a damage zone by a constitutive model coupling volume and cohesive elements Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-22 Haozhou He, Chloé Arson
This paper presents a method to simulate fracture propagation in a damage zone in 2D, whereby Cohesive Zone (CZ) elements are assigned the same Continuum Damage Mechanics (CDM) model as their adjacent finite elements. Material hardening is a result of damage-induced stiffness reduction in the finite and cohesive elements, while softening is modeled by cohesive debonding only. The damage components
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A comprehensive review of numerical simulation methods for hydraulic fracturing Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-17 Atif Ismail, Saman Azadbakht
Hydraulic fracturing unlocks previously inaccessible hydrocarbons in unconventional reservoirs by creating artificial pathways in the unconventional reservoir. Numerical simulation expands the scope of hydraulic fracturing design for various reservoir conditions. This review paper explores the synergy between numerical simulation and hydraulic fracturing modeling, focusing on critical elements like
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Micro-mechanism of stress-dilatancy anisotropy in granular materials: Affine and nonaffine deformation Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-17 Yang Liu, Xiaoxiao Wang
The stress-induced dilatancy anisotropy is an important kinematic response in granular materials and is very complex due to the stochastic motion of particles. In this study, the local stress-dilatancy relationship is investigated referring to the local contact force and relative displacement in a certain contact direction. The micromechanism of this anisotropy is investigated from the view of affine
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Theoretical solutions for the anchoring force of 3-D anchored slope and optimization strategy for anchoring force distribution Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-15 Linghui Wang, Kunlin Lu, Dayong Zhu
Based on the three-dimensional limit equilibrium method with modifying normal stress over the slip surface, this study presents a theoretical solution for the anchoring force of three-dimensional slopes and proposes a new optimization strategy for anchor force distribution. The method employed the Boussinesq solution from the field of elasticity. It led to the derivation of an equilibrium equation
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Geotechnical reliability-based design optimization updating under changing design scenarios Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-16 Tao Wang, Jian Ji
In the context of geotechnical uncertainty characterization, the reliability-based design optimization (RBDO) provides an effective means to achieve the most balanced design outcome between the targeted safety and the risk-based cost planning. As a common practice, the geotechnical RBDO is conducted on the premise of prescribed statistical information of those uncertain parameters. Nevertheless, the
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Cover Image, Volume 48, Issue 2 Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-11 Zhi Yong Ai, Zi Kun Ye, Hong Wei Huang, Ke Xin Hu
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Strain localization in the standard triaxial tests of granular materials: Insights into meso- and macro-scale behaviours Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-09 Quoc T. Phan, Ha H. Bui, Giang D. Nguyen, François Nicot
The standard triaxial tests cease to be valid as material tests since the homogeneity of the granular mass is lost when localized failures such as shear bands occur requiring a different approach to interpreting and analyzing material responses at the meso scale from the macro behaviour. This study sheds light on the above issue by analyzing the standard triaxial tests of the granular specimens undergoing
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Deep learning-accelerated multiscale approach for granular material modeling Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-09 Qingzheng Guan, Zhongxuan Yang, Ning Guo, Lifan Chen
The hierarchical finite element method (FEM)–discrete element method (DEM) multiscale approach is a powerful tool for solving geotechnical boundary value problems. However, despite parallel computing can be resorted to, the high computational cost remains an insurmountable barrier to its practical application in engineering-scale problems. As an alternative, a deep learning model (DLM) is employed
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Analytical models for electroosmotic consolidation of layered soil systems considering the boundary effects of horizontal electrodes Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-04 Jian-Ping Li, Zhang-Long Chen, Jin-Ping Zhuang, Jun Liu, Shun Wang
The pore water can usually flow through the horizontal electrodes, resulting in the top sand layer and the bottom unelectroosmotic layer inevitably affecting the consolidation process of the electroosmotic layer. However, the traditional assumption of the fully drained or undrained electrode boundaries is unable to reflect these boundary effects. In this study, one-dimensional analytical models for
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Physics-informed neural networks for large deflection analysis of slender piles incorporating non-differentiable soil-structure interaction Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-04 Weihang Ouyang, Guanhua Li, Liang Chen, Si-Wei Liu
Physics-informed neural networks (PINN) is an emerging machine learning technique and has been applied in different areas successfully. To benefit pile analysis from this innovative technique, this paper addresses several problems that arise when extending PINN to the large deflection analysis of slender piles accounting for nonlinear Soil-Structure Interaction (SSI). The governing equations for the
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Modelling the evolution of water retention hysteresis loops during soil deformation based on the ink-bottle effect Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-04 Ke Chen, Annan Zhou, Fayun Liang
The ink-bottle effect, resulting from the heterogeneous pore structure, plays a significant role in the hydraulic hysteresis of water retention behavior. Experimental evidence indicates that volumetric deformation extensively influences the hysteresis characteristics of the soil-water retention curve (SWRC). This paper presents a physical–based model that aims to simulate the contraction of the hysteresis
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Thermal consolidation of layered saturated soil under time-dependent loadings and heating considering interfacial flow contact resistance effect Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-03 Jiahao Xie, Minjie Wen, Yuan Tu, Dazhi Wu, Kaifu Liu, Kejie Tang
Due to the presence of tiny gaps at the interface of two layers of saturated soil, water seepage occurs at a slower rate within these gaps, resulting in laminar flow at the interface. Based on the Hagen-Poiseuille law, a general imperfect flow contact model was established for layered saturated soil interfaces by introducing the flow contact transfer coefficient Rω and the flow partition coefficient
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A novel constitutive model for the concrete face slab of a CFRD and the numerical simulation of its seismic behavior Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-03 Jianjun Xu, Zhiyuan Ning, Yingjun Wang, Wei Zhou, Sheng Zhu
With the rising demand for hydropower energy, China has built numerous concrete-faced rockfill dams (CFRDs) with considerable heights. The potential failure pattern of the concrete face slab is the key to the safety of the anti-seepage system. However, engineers commonly employ an elastic relationship to model the concrete face slab for simplicity, which induces inaccurate estimation of the face slab's
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Uplift behavior of nodular diaphragm wall: Experiment and theory Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-03 Jiujiang Wu, Yi Zhang, Yan Li, Hua Wen, Lijuan Wang
The nodular diaphragm wall (NDW) is a novel foundation that can provide significant uplift load resistance compared to a typical diaphragm wall foundation. With the advantages of low noise, cost-effectiveness, high work efficiency, and construction abilities close to existing buildings, NDW has excellent engineering application prospects in urbanization construction. However, the scarce knowledge on
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A coupled phase-field method (PFM) and thermo-hydro-mechanics (THM) based framework for analyzing saturated ice-rich porous materials Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-03 Mahyar Malekzade Kebria, SeonHong Na
This study proposes a novel framework for ice-rich saturated porous media using the phase-field method (PFM) coupled with a thermo-hydro-mechanical (THM) formulation. By incorporating the PFM and THM approaches based on the continuum theory, we focus on the mechanical responses of fully saturated porous media under freeze-thaw conditions. The phase transition between liquid water and crystalline ice
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Stochastic finite element modeling of heterogeneities in massive concrete and reinforced concrete structures Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2024-01-03 Maria Ghannoum, Julien Baroth, Alain Millard, Claude Rospars
The lifespan of a reinforced concrete (RC) structure can be greatly influenced by the spatial variability of its material characteristics which, in particular, explains the observed or measured reduction of the tensile strength at first crack when the volume under tension increases. This paper discusses the ability of accounting for the spatial variability of the tensile strength of concrete in RC
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A thermal state-dependent bounding surface model for volume change of clay Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2023-12-28 Shuai Zhang, Charles Wang Wai Ng, Xudong Zhao, Qi Zhang
Thermally induced volumetric strain of clay is crucial for geotechnical applications involving thermal loading. The volumetric response of clay shows a ratcheting pattern during thermal cycles until reaching a thermal stabilized state. It is also affected by the stress history of soil, including over-consolidation ratio (OCR) and recent stress history (RSH). This paper introduces a new bounding surface
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Finite analytical method on corner-point grid for fluid flow in heterogeneous porous media Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2023-12-28 Tianyu Liu, Xiangzeng Wang, Zhifeng Liu, Quansheng Liang, Xiaohong Wang, Jian Li
The three-dimensional (3D) corner-point grid system, as an industrial standard, has been widely used in oil reservoir geological modeling and numerical simulation due to its versatility compared to traditional orthogonal grids. The finite analytical method (FAM) is proposed for corner-point grid systems in this article, which can greatly improve the simulation accuracy, especially for strongly heterogeneous
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Influence of different cooling treatments on the mechanical properties of granite under Brazilian splitting test by grain-based model 3D Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2023-12-27 Wen-Ling Tian, Sheng-Qi Yang, Peng-Fei Yin, Zhen-Nan Zhu, Yan-Hua Huang
During the operation of an enhanced geothermal system (EGS), the reservoir rock undergoes different cooling treatments based on the distance to the surface rock. The tensile capacity of reservoir rocks is a key parameter in estimating the parameters of the hydraulic fracturing process. Therefore, the gain-based model 3D (GBM3D) was constructed to explore the micro behavior of granite under the heating/cooling
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Anisotropic continuum framework of coupled gas flow – adsorption – deformation in sedimentary rocks Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2023-12-27 Qi Zhang, Zhen-Yu Yin, Xia Yan
Solid deformation is always a crucial factor of gas transport in sedimentary rocks. While previous studies always adopt the assumption of isotropic poroelastic deformation, anisotropic poroelastoplastic deformation is rarely considered, despite anisotropy being a ubiquitous property of natural sedimentary rocks. In this work, an anisotropic poromechanical model is established to analyze the matrix
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A limit analysis approach to uplift bearing capacity of shallow plate anchors in marine environments Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2023-12-27 Mateus Forcelini, Samir Maghous, Fernando Schnaid
Offshore oil and gas exploration activities involve the installation of various subsea infrastructures on the ocean floor, often supported by shallow foundations such as anchor plates or mudmats. These foundations must be designed to withstand applied service loads along the structure lifecycle, including decommissioning loads required for subsequent removal. In this context, this work is dedicated
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On the friction dependency of the stress Lode angle Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2023-12-19 Gertraud Medicus, Mehdi Pouragha, Alexander Ostermann, Wolfgang Fellin
The shape of the failure locus of a material is significant for its strength predictions. Even when constitutive models include the same critical stress surface, different critical stress ratios can be predicted for an identical applied isochoric strain path. In this article, we investigate critical stress predictions of different constitutive models, which include the surface according to Matsuoka–Nakai
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Influence of normal stress-induced three-dimensional rough fracture aperture heterogeneity on nonlinear seepage-heat transfer coupling processes Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2023-12-18 Ze Zhang, Shuhong Wang, Bowen Han, Furui Dong, Qinkuan Hou
A clear understanding of the dependence of the heat transfer process on the flow field in three-dimensional (3D) rough fractures is crucial for many underground projects. In this study, 3D rough rock fractures with heterogeneous apertures and mechanical effects are established. Navier-Stokes flow and local heat balance theory are used to simulate the seepage-heat transfer coupling process. Five normal
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Consistent treatment of shear failure in embedded discrete fracture models using XFVM Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2023-12-18 Giulia Conti, Rajdeep Deb, Stephan K. Matthäi, Patrick Jenny
Understanding deformations and fluid flow in fractured rocks is of central importance for many subsurface flow applications. Thus, numerical frameworks are needed that capture the coupled mechanical and hydraulic behaviour, including scenarios with complex fracture networks. This paper employs the extended finite volume method to represent fracture manifolds in a poroelastic matrix domain and to compute
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Analytical prediction for longitudinal deformation of shield tunnel subjected to ground surface surcharge considering the stiffness reduction Int. J. Numer. Anal. Methods Geomech. (IF 4.0) Pub Date : 2023-12-17 Shian Cao, Rongzhu Liang, Cheng Kang, Wenbing Wu, Zhaibang Ke, Yang Guo
This paper presents an improved longitudinal beam-spring model on the Vlasov foundation for estimating the longitudinal deformation of the shield tunnel when subjected to the ground surface surcharge. This model incorporates an improved subgrade modulus and treats each segmental ring as a Timoshenko short beam, with each circumferential joint modeled by two mechanical springs. It can accurately reflect