Article
Computer Science, Interdisciplinary Applications
Changjie Zheng, George Kouretzis, Xuanming Ding
Summary: This paper presents a systematic study on the effect of radial soil deformations on the dynamic response of floating piles subjected to axial loads. The proposed novel mathematical model is compared to rigorous numerical boundary integral methods, and it is shown that the model produces similar results. Comparisons with an earlier model show that the confined model overestimates stiffness and underestimates damping of the pile impedance in the low frequency range, regardless of the problem conditions.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Construction & Building Technology
Bin Han, J. B. Sun, Milad Heidarzadeh, M. M. Nemati Jam, O. Benjeddou
Summary: This study utilizes 3D non-linear finite element assessment to study dynamic soil-structure interaction, demonstrating the accuracy of the numerical model in replicating observed responses. The research highlights the importance of considering the non-linear behavior of soil and the multi-directional nature of seismic events in FE analysis.
STEEL AND COMPOSITE STRUCTURES
(2021)
Article
Engineering, Geological
Jishuai Wang, Tong Guo, Yazhou Xie, Zhenyu Du
Summary: The dynamic interaction between soil and structure groups (SSGI) plays a crucial role in the seismic design and evaluation of structures in densely built areas. This study develops a three-dimensional numerical method to investigate the SSGI effect, and finds that it can reduce the structural base shear and story drift in most cases. However, the reduction is less significant when the structure spacing is larger or the soil's shear wave velocity is higher. The SSGI effect mainly alters the local ground acceleration input at the base of the concerned structure. It becomes more significant when the structure spacing decreases, the structure number increases, or the central structure's height equals those of the surrounding structures. The influence of soil property on the SSGI effect is minor under medium-level earthquakes.
BULLETIN OF EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Marine
Mantu Majumder, Debarghya Chakraborty
Summary: A 3D numerical model is developed to study the lateral response of under-reamed piles in sand under lateral loading. The study shows that under-reamed piles at higher bulb positions exhibit stiffer load-deflection response, better load-carrying capacity, lesser deflection, and lower negative shear force and bending moment in the shaft compared to piles without bulbs. The provision of a bulb improves both pile capacity and structural response.
Article
Engineering, Chemical
Mazen Hafez, Mahyar Ghazvini, Philippe Mandin, Myeongsub Kim
Summary: This study investigates the three-dimensional flow over dual particles at different separation distances and Reynolds numbers, with a focus on the particle's lift behavior in close proximity. Even minimal changes in separation distance can result in unique flow patterns and a non-linear increase in lift coefficient. The study also shows that the repulsion behavior and flow blockage between particles are not necessarily correlated. Transient simulations reveal that periodic vortex shedding is not only influenced by Reynolds number and separation distance, but also by various combinations of these variables. Evident periodic vortex shedding is observed at 0.25D and Re = 250, while mini periodic instabilities occur at the same Reynolds number but with a larger separation distance (0.5D). An inverse relationship between lift and separation distance is observed, and different lift patterns are quantified at different Reynolds numbers.
Article
Engineering, Geological
Abdulmuttalip Ari, Gizem Misir
Summary: The study investigates the effects of geocell reinforcement on shell foundation behavior using PLAXIS 3D finite element software. It shows that geocell reinforcement can significantly reduce settlement, improve bearing capacity, and distribute stress more widely in sandy beds compared to unreinforced cases. Additionally, the maximum improvement is observed in conical shell foundations.
GEOTEXTILES AND GEOMEMBRANES
(2021)
Article
Computer Science, Interdisciplinary Applications
Xuelai Wang, Chengshun Xu, Guanyu Yan, Zilan Zhong, Zihong Zhang
Summary: This study proposes a three-dimensional numerical simulation method for simulating the nonlinear seismic response of underground structures in liquefiable sites. The numerical model takes into account the characteristics of sand prone to large deformation after liquefaction and the nonlinear characteristics of the contact between saturated soil and structure. The model is validated by comparing with experimental results and structural damage analysis is conducted.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Changjie Zheng, George Kouretzis, Xuanming Ding, Lubao Luan
Summary: This paper presents an analytical solution to describe the dynamic interaction between a single end bearing pile and its surrounding poroelastic soil. The solution considers both the two-phase soil and the pile as three-dimensional continua, allowing for the analysis of wave propagation and its effects on pile response.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Geological
Julian Freisinger, Marko Radisic, Francesca Taddei, Gerhard Mueller
Summary: The dynamic response of rigid and flexible three-dimensional foundations of arbitrary shape placed on a homogeneous or layered halfspace is determined numerically. A 2.5D coupled Integral Transform Method (ITM) Finite Element Method (FEM) approach is used for computation, and the influence of foundation stiffness on the total response and power transmission is studied. The method is also applied to evaluate the influence of a tunnel and a stiff cylindrical inclusion on the dynamic response of the foundation, demonstrating the importance of considering Structure-Soil-Structure-Interaction (SSSI).
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Construction & Building Technology
Ali Lakirouhani, Reyhaneh Jafari, Hadi Hasanzadehshooiili
Summary: This paper presents a three-dimensional finite difference analysis to study the interactive effects of sequential tunneling and superstructure on ground settlement profiles. The numerical modeling accuracy is validated and effects of tunnel diameter, depth, and number of superstructure stories on settlement profiles are investigated. The study shows a direct relationship between tunnel depth and diameter, and settlement, with the number of superstructure stories having a more considerable effect on maximum settlement compared to free-field conditions.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
D. Diaz-Arriba, T. Jardin, N. Gourdain, F. Pons, L. David
Summary: This paper examines the applicability and accuracy of high-fidelity experimental and numerical approaches in analyzing three-dimensional flapping wings. It also investigates the impact of mass and frequency ratios on wing dynamics and flow physics.
BIOINSPIRATION & BIOMIMETICS
(2022)
Article
Computer Science, Interdisciplinary Applications
Miaomiao Chen, Jianbo Li, Zhiyuan Li
Summary: In this study, a numerical algorithm was investigated to solve the dynamic impedance function of arbitrary-shaped foundations in layered soil. The algorithm derived the relationship between the number and radius of sub-disk elements and their dynamic impedance matrix based on the wave propagation equation of a horizontally layered half space and the high-precision method of solving Green's function. The proposed method was verified and shown to reduce calculation time and improve efficiency compared to existing methods.
COMPUTERS & STRUCTURES
(2023)
Article
Mechanics
Li Wang, Fang-Bao Tian, Hao Liu
Summary: This paper presents a numerical study on the aerodynamic performance of flapping wings in ultra-low-density fluid, focusing on the effects of compressibility on force production and efficiency. The study finds that rigid wings experience reduced lift coefficient and efficiency with increased Mach number. Various strategies, such as adjusting aspect ratio, stroke amplitude, and flexibility, are explored to achieve sufficient lift force. An optimized flexible wing is proposed and simulated, demonstrating significant improvements in lift coefficient and efficiency.
Article
Engineering, Aerospace
Xiangyu Meng, Hui Tian, Ruipeng Yu, Yudong Lu, Xiaoming Gu, Guang Tan, Guobiao Cai
Summary: In this study, a three-dimensional dynamic numerical model was established to investigate hybrid rocket motors. The model was verified through ground experiments, and the results showed good agreement between the simulation and experiment. This method can accurately predict the regression of complex-shaped grains and guide the design of the motor.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Yuanzhe Li, Pengpeng Bai, Hui Cao, Lvzhou Li, Xinxin Li, Xin Hou, Jingbo Fang, Jingyang Li, Yonggang Meng, Liran Ma, Yu Tian
Summary: This study demonstrates a method based on stereo vision to measure three-dimensional traction stress with high spatial and temporal resolution. The method can be applied in various fields such as biology, physics, and robotics, and has important implications for related applications.
Article
Engineering, Geological
Marcin Cudny, Andrzej Truty
Article
Engineering, Geological
Marcin Cudny, Katarzyna Staszewska
Summary: This paper presents a new hyperelastic model for simulating the stress-induced and inherent anisotropy of soil small strain stiffness. The model has a low number of material constants and can be used in developing more sophisticated hyperelastic-plastic models for overconsolidated soils.
Article
Engineering, Civil
M. Cudny
ARCHIVES OF CIVIL ENGINEERING
(2011)
Article
Computer Science, Interdisciplinary Applications
M Cudny, PA Vermeer
COMPUTERS AND GEOTECHNICS
(2004)
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)