Article
Green & Sustainable Science & Technology
Dulpinit Noo-Iad, Jim Shiau, Weeraya Chim-Oye, Pitthaya Jamsawang, Suraparb Keawsawasvong
Summary: In this study, three efficiency factors were proposed to describe the bearing capacity effects of closely spaced footings using Terzaghi's traditional bearing capacity equation. The numerical analysis showed that the efficiency factors were significantly influenced by the internal frictional angle and the spacing ratio. Design charts were also produced to provide practical guidelines for foundation engineering practitioners.
Article
Computer Science, Interdisciplinary Applications
K. Krishnan, Debarghya Chakraborty
Summary: This paper investigates the importance of inherent variability of soil under strip footing subjected to combined effect of inclined and eccentric loads using probabilistic analysis. The study demonstrates that combined loading and spatial variability of the soil have an impact on the bearing capacity of the footing. While the mean bearing capacity factor is higher than the deterministic value for higher vertical correlation distances, the probability of failure of the footing exceeds 50%, indicating the need for probabilistic analysis.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Multidisciplinary
Magdi El-Emam, Youcef El Berizi, Ahmed B. Mabrouk, Sami W. Tabsh
Summary: A parametric study was conducted using the finite element method to investigate the bearing capacity and failure mechanisms of strip footings on cohesionless soil slopes. The study quantified the variations in bearing capacity caused by different design parameters, footing dimensions, and soil properties. A multilinear equation was developed to predict the bearing capacity of the footing on the top of a slope, which showed reasonable accuracy.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Engineering, Geological
Ty Phuor, Indra S. H. Harahap, Cheng Yee Ng
Summary: This paper presents the computations of vertical bearing capacity factors for different types of footings resting on soil with varying friction angles. The results show that the bearing capacity factors increase with increasing friction angle, and footings with a rough base have significantly greater factors at high friction angles. Additionally, the study indicates that the shape factors may depend on the friction angle.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2022)
Article
Engineering, Geological
Arman Khazaei, Ghazal Rezaie Soufi, Reza Jamshidi Chenari
Summary: This study investigated the pseudostatic bearing capacity of a strip footing placed close to an existing strip footing in cohesionless soil using the lower-bound finite-element limit analysis method. Results showed that the presence of the existing footing could improve the new footing's bearing capacity, but seismicity ultimately caused the new footing to withstand smaller accelerations. Increasing spacing generally reduced bearing capacity, except for specific cases with a friction angle of 40 degrees.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Sumanta Roy, Manash Chakraborty
Summary: In this study, the upper bound collapse load of shallow strip foundations was evaluated considering the unsaturated state of the soil. The vadose zone effect was considered using a suction-stress based effective stress approach. The soil suction was modelled using van-Genuchten's soil water characteristics curve and Gardner's hydraulic conductivity function. A Hill-type mechanism was considered to ensure kinematic admissibility, and a new bearing capacity factor was introduced to account for unsaturated soil properties and climate changes. The obtained results were in good agreement with available solutions.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Construction & Building Technology
Divesh Ranjan Kumar, Pijush Samui, Warit Wipulanusat, Suraparb Keawsawasvong, Kongtawan Sangjinda, Wittaya Jitchaijaroen
Summary: Various machine learning algorithms were proposed to estimate the seismic bearing capacity factor (N-c) of strip footings on sloping ground. A total of 1296 samples were used to train and test the models, and sensitivity analysis was performed on all input parameters. Performance parameters were calculated to assess the models' performance, and the MPMR model achieved the highest R-2 values and the lowest RMSE values in both training and testing phases.
Article
Computer Science, Interdisciplinary Applications
Quang N. Pham, Satoru Ohtsuka, Koichi Isobe, Yutaka Fukumoto
Summary: This paper estimates the ultimate bearing capacity of rigid strip footings under eccentrically inclined loads using the rigid plastic finite element method. The study considers the effect of soil properties and footing width on the loading planes and clarifies the effect of positive and negative horizontal loads on the limit load space. The results show that the direction of the horizontal load has a notable effect on the bearing capacity, but this effect becomes negligible for large eccentricity lengths.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Marine
Zhao-gang Luo, Xuan-ming Ding, Qiang Ou, Hua-qiang Fang
Summary: This study investigates the bearing capacity and deformation behavior of a rigid strip footing on coral sand slopes using model-scale tests. The results show that geogrid reinforcement significantly improves the bearing capacity of coral sand slopes. The bearing capacity increases with the increasing edge distance and the decreasing slope height and angle.
Article
Computer Science, Interdisciplinary Applications
K. Krishnan, Debarghya Chakraborty
Summary: This paper explores the influence of dynamic behavior under earthquake loading and soil heterogeneity on the bearing capacity of strip footing. The analysis uses a finite element lower bound limit analysis formulation with Monte Carlo Simulation technique. Results show that even with a high factor of safety, structures may still fail and the dynamic effect of seismic waves can alter the failure mode.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Civil
Rui Zhang, Mingwei Feng, Yao Xiao, Guanting Liang
Summary: This study investigates the seismic bearing capacity of strip footings on undrained clay with single continuous square voids. Adaptive finite element limit analysis is used to perform numerical studies, and upper and lower bounds of the seismic bearing capacity are obtained. The effects of different parameters on the seismic bearing capacity are evaluated.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Environmental Sciences
Jingna Du, Fei Ye
Summary: The bearing capacity of strip footings near the crest of unsaturated soil slopes is determined using a unified numerical limit analysis method. The study analyzes the effects of groundwater table and surface water infiltration on different soils. It shows that the hydraulic state significantly impacts the bearing capacity, critical footing distance, and collapse mechanism.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Engineering, Geological
H. C. Nguyen, T. Vo-Minh
Summary: This paper adopts an upper bound procedure using the cell-based smoothed finite element method (CS-FEM) to estimate the seismic bearing capacity of shallow strip footings, focusing on seismic soil-structure interactions. The simulation results are in good agreement with other finite element analyses, which provides a reliable method for the seismic design of foundations. The inclusion of seismic conditions and the computation of reduction coefficients further facilitate the seismic design process.
Article
Engineering, Civil
Ramin Vali, Saeed Khosravi, Majid Beygi
Summary: This study evaluates the effects of the geometrical features of the excavation and the soil strength properties on the seismic bearing capacity of a strip footing. The lower and upper bounds of the finite element limit analysis method are used for evaluation. The effects of setback distance ratio (L/B), excavation height ratio (H/B), soil strength heterogeneity (kB/c(u)), and horizontal earthquake coefficient (k(h)) are analyzed, and design charts and tables are produced for clarity in understanding the relationship between undrained seismic bearing capacity and selected parameters.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2023)
Article
Engineering, Civil
Gaoqiao Wu, Minghua Zhao, Heng Zhao
Summary: This study investigated the undrained seismic bearing capacity of strip footings embedded in two-layered slopes using finite element limit analysis. Results indicated that seismic bearing capacity increases with the growth of horizontal embedment depth of footings.
EARTHQUAKE SPECTRA
(2021)
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)