International Journal for Numerical and Analytical Methods in Geomechanics最新文献_第9页

Investigation of Suffusion Under Torsional Shear Conditions With CFD-DEM 利用 CFD-DEM 研究扭转剪切条件下的渗流问题

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-09-24 DOI: 10.1002/nag.3844

Shun-Xiang Song, Zhen-Yu Yin, Ya-Jing Liu, Pei Wang, Yi-Pik Cheng

{"title":"Investigation of Suffusion Under Torsional Shear Conditions With CFD-DEM","authors":"Shun-Xiang Song, Zhen-Yu Yin, Ya-Jing Liu, Pei Wang, Yi-Pik Cheng","doi":"10.1002/nag.3844","DOIUrl":"10.1002/nag.3844","url":null,"abstract":"<p>This study investigates, for the first time ever, the suffusion on gap-graded granular soils under torsional shear conditions from a microscopic perspective. A numerical model of the hollow cylinder torsional shear test (HCTST) using the discrete element method (DEM) is first developed, where an algorithm for simulating the real inner and outer rubber membranes of the hollow cylinder apparatus (HCA) is introduced. After the validation, the computational fluid dynamics (CFD) approach is introduced for the coupling between the particle and fluid phases. Then, a series of the coupled CFD-DEM suffusion simulations considering the rotation of the major principal stress axis (<i>α</i>) and intermediate principal stress ratio (<i>b</i>) are conducted. It is found that more fine particles are eroded in cases having smaller <i>α</i> and <i>b</i>, and the clogging phenomenon in the middle zones becomes more significant as both <i>α</i> and <i>b</i> increase. From the microscopic perspective, the specimens whose contact anisotropy principal direction is close to the fluid direction will lose more fines, and the anisotropy magnitude also plays an important role. In addition, the differences in structure and vertical connectivity of the pores in HCTST samples under various complex loading conditions cause fine particles to have different migration paths, further resulting in different fines mass loss.</p>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"48 17","pages":"4274-4290"},"PeriodicalIF":3.4,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/nag.3844","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142317528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of Soil–Structure Interface Models Considering Cyclic Loading Effect 考虑循环荷载效应的土与结构界面模型评估

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-09-24 DOI: 10.1002/nag.3831

Hai-Lin Wang, Zhen-Yu Yin, Xiao-Qiang Gu, Yin-Fu Jin

{"title":"Evaluation of Soil–Structure Interface Models Considering Cyclic Loading Effect","authors":"Hai-Lin Wang, Zhen-Yu Yin, Xiao-Qiang Gu, Yin-Fu Jin","doi":"10.1002/nag.3831","DOIUrl":"10.1002/nag.3831","url":null,"abstract":"<p>The simulation of the soil–structure interface (SSI) under cyclic loading is critically important in geotechnical engineering. Numerous studies have been conducted to explore the cyclic behaviors exhibited at the SSI. However, existing model evaluations primarily rely on direct comparisons between experiments and simulations, with limited analysis focused on specific behaviors like accumulated normal displacement and stress degradation under cyclic loading. This study proposes and adapts six SSI models, including three nonlinear incremental models and three elastoplastic models. These models incorporate nonlinear shear modulus, critical state theory, and particle breakage effects to enhance their capability to capture SSI behaviors. Utilizing optimization-based calibration for a fair comparison, the model parameters are fine-tuned based on the experimental data. Comprehensive assessments including global comparisons and specific behaviors like accumulated normal displacement and stress degradation are carried out to evaluate the models' performance. The results indicate that all models effectively replicate the typical behaviors of SSI systems. By incorporating the particle breakage effect, the models can represent both the reversible and irreversible normal displacements under cyclic loading with better performance. The irreversible normal displacement remains stable and is solely influenced by the soil properties rather than the stress level. Moreover, the models successfully capture the stress degradation under constant normal stiffness caused by the irreversible normal displacement.</p>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"48 17","pages":"4257-4273"},"PeriodicalIF":3.4,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/nag.3831","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142317529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel Simplified Practical Method for One-Dimensional Large-Strain Consolidation 一维大应变固结的新型简化实用方法

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-09-23 DOI: 10.1002/nag.3843

Ding-Bao Song, Peng-Lin Li, Zhen-Yu Yin, Jian-Hua Yin

{"title":"Novel Simplified Practical Method for One-Dimensional Large-Strain Consolidation","authors":"Ding-Bao Song, Peng-Lin Li, Zhen-Yu Yin, Jian-Hua Yin","doi":"10.1002/nag.3843","DOIUrl":"10.1002/nag.3843","url":null,"abstract":"<p>A new simplified practical method for one-dimensional nonlinear large-strain consolidation of saturated homogenous soils is proposed. The derivation processes of the proposed method are introduced first, with a modification of Terzaghi's theory from a novel perspective to solve large-strain consolidation problems. Verification checks of the proposed method with other solutions are then conducted. The proposed method is different from Lekha's solution because Lekha's analytical solution is based on the small strain theory. For linear consolidation, the proposed method shows excellent agreement with the Consolidation Settlement 2 (CS2) model. For nonlinear large-strain consolidation, the new method is in good agreement with the CS2 model when <i>C<sub>c</sub></i>/<i>C<sub>k</sub></i> ≤ 1. After that, optimization of the proposed nonlinear solution is carried out for <i>C<sub>c</sub></i>/<i>C<sub>k</sub></i> > 1 with a more precise average constant coefficient of consolidation used in the simplified practical method, and good agreement is obtained between the solutions from the proposed method and the CS2 model. Overall, the proposed simplified method provides practical, reliable, and efficient solutions for analyzing linear and nonlinear large-strain consolidation.</p>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"48 17","pages":"4244-4256"},"PeriodicalIF":3.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/nag.3843","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142313706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analytical Solution to Estimate the Effect of Underlying Tunnel Excavations on the Existing Tunnel 估算地下隧道挖掘对现有隧道影响的分析方案

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-09-19 DOI: 10.1002/nag.3836

Guohui Feng, Zhi Ding, Changjie Xu, Luju Liang, Shangqi Ge, Xiaozhen Fan, Kaifang Yang, Gang Wei

{"title":"Analytical Solution to Estimate the Effect of Underlying Tunnel Excavations on the Existing Tunnel","authors":"Guohui Feng, Zhi Ding, Changjie Xu, Luju Liang, Shangqi Ge, Xiaozhen Fan, Kaifang Yang, Gang Wei","doi":"10.1002/nag.3836","DOIUrl":"10.1002/nag.3836","url":null,"abstract":"<div>\u0000 \u0000 <p>The tunneling underlying inevitably leads to the displacement of adjacent soil, greatly influencing the deformation of the tunnel above. Most theoretical studies primarily concentrate on analyzing the mechanical equilibrium of individual tunnel sections, ignoring the energy generated by the system during tunnel deformation. Based on this, in view of the energy relationship, the overlying tunnel's deformation is simulated by using the Rayleigh–Ritz method. Further, its potential energy equation can be established based on the Vlasov foundation. The corresponding energy variational solution is solved according to the minimum potential energy principle, leading to an analytical solution for the shield tunneling-induced overlying tunnel's response. The efficacy of the suggested method is verified by contrasting it with centrifuge experiments and field case studies derived from prior studies. Relative to the Winkler foundation model, which deviated from the suggested approach, the results derived from the suggested method show a closer correlation with the collected measurement data. Further parameter studies show that the vertical clearance and skew angle between two tunnels, the volume loss rate, and elastic modulus are significant factors affecting the tunnel behaviors due to tunneling underneath. The suggested theoretical model can be applied to forecast potential risks that an existing tunnel may encounter during the excavation of a new tunnel underlying in similar engineering projects.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"48 17","pages":"4221-4231"},"PeriodicalIF":3.4,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142275652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced Hybrid Algorithms for Segmentation and Reconstruction of Granular Grains From X-Ray Micro Computed-Tomography Images 从 X 射线显微计算机断层成像图像分割和重建颗粒的增强型混合算法

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-09-19 DOI: 10.1002/nag.3832

Ruidong Li, Pin Zhang, Zhen-Yu Yin, Brian Sheil

{"title":"Enhanced Hybrid Algorithms for Segmentation and Reconstruction of Granular Grains From X-Ray Micro Computed-Tomography Images","authors":"Ruidong Li, Pin Zhang, Zhen-Yu Yin, Brian Sheil","doi":"10.1002/nag.3832","DOIUrl":"10.1002/nag.3832","url":null,"abstract":"<p>Accurate three-dimensional (3D) reconstruction of granular grains from x-ray micro-computed tomography (µCT) images is a long-standing challenge, particularly for dense soil samples. This study develops a machine learning (ML) enhanced approach to automatically reconstruct granular grains from µCT images. The novel academic contributions of this paper include (a) a hierarchical strategy based on parameter-independent polygonal approximation, area, and concavity analysis, for the first time, to identify and eliminate both intergranular and intragranular voids; (b) incorporation of a recursive segmentation scheme and ML-based grain classifier to avoid over-segmentation; (c) novel modifications on the determination of splitting paths to enhance segmentation accuracy; and (d) an effective approach of assigning initial level set functions for reconstructing granular grains automatically. The hybrid ML algorithm is applied to µCT images of dense Mojave Mars Simulant. The results indicate that the proposed method can accurately segment grain clumps with unclear boundaries. The new automatic reconstruction algorithm eliminates ineffective operations and achieves a three-fold increase in computational speed than previous methods documented in the literature. Ninety-one percent of grains with distinct boundaries can be reconstructed and the reconstruction ratio reaches 81% even for grains without distinct boundaries. The overall reconstruction ratio of grains increases by 20% compared with previous methods, achieving a step-change improvement for one-to-one mapping of real soil samples.</p>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"48 17","pages":"4206-4220"},"PeriodicalIF":3.4,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/nag.3832","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142275654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Stress-Driven Double-Phase–Field Framework for Tensile Fracturing Processes in Transversely Isotropic Rocks 横向各向同性岩石拉伸压裂过程的应力驱动双相场框架

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-09-19 DOI: 10.1002/nag.3830

Weihong Yuan, Yang Zhao, Bingyin Zhang

{"title":"A Stress-Driven Double-Phase–Field Framework for Tensile Fracturing Processes in Transversely Isotropic Rocks","authors":"Weihong Yuan, Yang Zhao, Bingyin Zhang","doi":"10.1002/nag.3830","DOIUrl":"10.1002/nag.3830","url":null,"abstract":"<div>\u0000 \u0000 <p>We present a double-phase–field framework for tensile fracturing processes in transversely isotropic rocks. Two distinct phase-field variables are introduced to represent smeared approximations of tensile fractures along the weak bedding planes and through the anisotropic rock matrix, respectively. Driving forces that control fracture propagation in the phase-field framework are constructed as a stress-based formula with a recently developed tensile failure criterion that distinguishes the two failure modes in transversely isotropic rocks. For numerical implementation, we adopt a staggered integration scheme and decouple the governing equations so that the displacement field and phase-field variables can be updated in sequence for a given loading step. The finite element formulation of the proposed framework is introduced in detail in this paper and is implemented in an in-house finite element code. The numerical implementation is then validated by reproducing the uniaxial tension test results of Lyons sandstone. After that, we conduct simulations on a pre-notched square plate loaded in tension to demonstrate the features of the proposed framework. Finally, we conduct simulations of three-point bending tests of Pengshui shale and show that the proposed model can reproduce the force–displacement curves and failure patterns of specimens with different bedding plane orientations observed in laboratory experiments.</p></div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"48 17","pages":"4188-4205"},"PeriodicalIF":3.4,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142275653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Semi-Analytical Solution for One-Dimensional Nonlinear Consolidation of Multilayered Soil Considering Self-Weight and Boundary Time Effect 考虑自重和边界时间效应的多层土一维非线性固结的半解析解

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-09-19 DOI: 10.1002/nag.3839

Mengfan Zong, Jing Zhang, Wenbing Wu, Ziye Yu, Yi Zhang, Guoxiong Mei

{"title":"Semi-Analytical Solution for One-Dimensional Nonlinear Consolidation of Multilayered Soil Considering Self-Weight and Boundary Time Effect","authors":"Mengfan Zong, Jing Zhang, Wenbing Wu, Ziye Yu, Yi Zhang, Guoxiong Mei","doi":"10.1002/nag.3839","DOIUrl":"10.1002/nag.3839","url":null,"abstract":"<div>\u0000 \u0000 <p>The self-weight stress in multilayered soil varies with depth, and traditional consolidation research seldom takes into account the actual distribution of self-weight stress, resulting in inaccurate calculations of soil consolidation and settlement. This paper presents a semi-analytical solution for the one-dimensional nonlinear consolidation of multilayered soil, considering self-weight, time-dependent loading, and boundary time effect. The validity of the proposed solution is confirmed through comparison with existing analytical solutions and finite difference solution. Based on the proposed semi-analytical solution, this study investigates the influence of self-weight, interface parameter, soil properties, and nonlinear parameters on the consolidation characteristics of multilayered soil. The results indicate that factoring in the true distribution of self-weight leads to a faster dissipation rate of excess pore water pressure and larger settlement and settlement rate, compared to not considering self-weight. Both boundary drainage performance and soil nonlinearity have an impact on consolidation. If the boundary drainage capacity is inadequate, the influence of soil nonlinearity on consolidation diminishes.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"48 17","pages":"4232-4243"},"PeriodicalIF":3.4,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142245219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling of Drain Consolidation in the Quick Triaxial Test and Its Analytical Solution 快速三轴试验中的排水固结模型及其分析方法

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-09-17 DOI: 10.1002/nag.3842

Zhibo Chen, Jungao Zhu, Xinjiang Zheng, Lei Wang

{"title":"Modeling of Drain Consolidation in the Quick Triaxial Test and Its Analytical Solution","authors":"Zhibo Chen, Jungao Zhu, Xinjiang Zheng, Lei Wang","doi":"10.1002/nag.3842","DOIUrl":"10.1002/nag.3842","url":null,"abstract":"<div>\u0000 \u0000 <p>Sand columns have been widely used to accelerate drainage and then improving the mechanical properties of soft soil foundations. The sand column has also been introduced into the triaxial test by researchers, in the center of the cylindrical specimen, to greatly accelerate drainage and consolidation process. The objective of this paper is to evaluate the consolidation properties of the triaxial cylindrical specimen considering the presence of a sand column, and then to propose a consolidation model that simulates the consolidation process of the triaxial test. The consolidation equations were derived considering the drainage of the specimen with a sand column composed of both vertical and double-radial flows. Then the analytical solution of the model was obtained based on specific initial and boundary conditions. The comparison between the consolidation model and the laboratory tests yielded highly consistent. The case study demonstrated that the proposed consolidation model accurately simulates the evolution of average pore pressure and degree of consolidation in triaxial specimens containing a sand column. The studies on the consolidation parameters showed that there were different effects on the drainage rate for the diameter of specimen, the permeability coefficients of specimen and sand column, as well as the radius of the sand column.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"48 17","pages":"4178-4187"},"PeriodicalIF":3.4,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142236620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Micro-Mechanical Analysis for Residual Stresses and Shakedown of Cohesionless-Frictional Particulate Materials Under Moving Surface Loads 移动表面载荷下无内聚摩擦颗粒材料残余应力和抖动的微观力学分析

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-09-17 DOI: 10.1002/nag.3837

Wei Cai, Ping Xu, Runhua Zhang

{"title":"Micro-Mechanical Analysis for Residual Stresses and Shakedown of Cohesionless-Frictional Particulate Materials Under Moving Surface Loads","authors":"Wei Cai, Ping Xu, Runhua Zhang","doi":"10.1002/nag.3837","DOIUrl":"10.1002/nag.3837","url":null,"abstract":"<p>Residual stresses and shakedown have been successfully presented by two-dimensional numerical experiments based on the discrete element method (DEM), wherein a cohesionless-frictional material under moving surface loads was replicated through irregular-shaped particles. With surface loads below the shakedown limit, both permanent deformations and residual stresses cease to accumulate and the numerical structure shakes down after a number of load passes. Corresponding micro-mechanical analyses indicate that strong forces and normal forces make a dominant contribution to residual stresses. Besides, averaged magnitudes of interparticle forces and corresponding total contact numbers initially change with load passes, and their final variation trends will differ as the structure shakes down or not. Furthermore, polar distributions of interparticle forces and contacts have been presented, and variations of their preferential orientations were emphasised. Lastly, the fabric tensor and anisotropy of resultant forces were studied, presenting the anisotropy weakening of macro-stress fields, induced by developments of residual stresses.</p>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"48 17","pages":"4136-4153"},"PeriodicalIF":3.4,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142236220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analytical Solution for Longitudinal Seismic Responses of Circular Tunnel Crossing Fault Zone 穿越断层带的圆形隧道纵向地震响应的解析解

IF 3.4 2区工程技术

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-09-17 DOI: 10.1002/nag.3841

Jie Tang, Manchao He, Hanbing Bian, Yafei Qiao

{"title":"Analytical Solution for Longitudinal Seismic Responses of Circular Tunnel Crossing Fault Zone","authors":"Jie Tang, Manchao He, Hanbing Bian, Yafei Qiao","doi":"10.1002/nag.3841","DOIUrl":"10.1002/nag.3841","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper proposes a simplified analytical solution for longitudinal seismic responses of a circular tunnel crossing a fault zone under longitudinally propagating shear waves. The transmissions and reflections of shear waves at two geological interfaces between the fault zone and intact rock are considered when calculating the free-field displacement. An improved elastic foundation beam model considering different tangential contact conditions at the tunnel‒rock interface is also adopted. According to the continuous conditions at the two geological interfaces, explicit expressions for the tunnel displacement, bending moment, and shearing force are given. The effectiveness of the proposed analytical solution is validated via numerical simulations, and the importance of accounting for tangential contact conditions at the tunnel‒rock interface is emphasized. Moreover, parametric studies are performed to investigate the effects of the fault zone width, rock conditions, tunnel lining stiffness, tangential contact conditions, and earthquake frequency on the deformation and internal forces of tunnels subjected to seismic waves. This novel analytical solution can be utilized to quickly estimate the longitudinal seismic responses of circular tunnels crossing fault zones subjected to longitudinally propagating shear waves, particularly in the preliminary engineering design, and can be extended to geological conditions with multiple interfaces.</p>\u0000 </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"48 17","pages":"4154-4177"},"PeriodicalIF":3.4,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142236180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0