Article
Engineering, Civil
Vishwas N. Khatri, Jyant Kumar, Pragyan Paramita Das
Summary: The ultimate bearing capacity of a ring footing on loose sand deposit with a dense sand layer on top was determined using finite element limit analysis. The results showed that increasing the thickness of the dense sand layer significantly increased the bearing capacity, which then remained constant after reaching an optimal thickness. Additionally, the bearing capacity was maximized when the internal and external friction angles were close to 0.25.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Engineering, Geological
Gang Zheng, Jiapeng Zhao, Haizuo Zhou
Summary: This study investigated the interference effect of two adjacent strip footings on sand overlying clay using the upper-bound limit state plasticity method DLO. Design charts were created through the use of dimensionless parameters, and parametric studies were conducted to explore the influence of geometric and strength parameters on bearing capacity and failure mechanism. The accuracy of the developed model was validated using various statistical criteria.
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
Engineering, Geological
Brian Sheil, Jack Templeman
Summary: This paper investigates the influence of the caisson cutting face inclination angle on the vertical soil reaction in sand by using finite-element limit analysis and finite-element analysis methods. The results indicate that the influence of the cutting face inclination angle depends on the soil friction angle and the roughness of the cutting face, and a reduction in caisson radius leads to a significant increase in the vertical soil reaction.
Article
Computer Science, Interdisciplinary Applications
Shangchuan Yang, Wei Ci, Ben Leshchinsky, Kai Cui, Fei Zhang
Summary: The study investigates the scale effects of rectangular footings near slopes, finding that ignoring scale effects may lead to overly conservative design for bearing capacity. It also concludes that footing shape influences the observed failure mechanism, and a larger internal friction angle can amplify the observed bearing capacity scale effects.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Chemistry, Multidisciplinary
Ana Alencar, Ruben Galindo, Claudio Olalla Maranon
Summary: This study examines the influence of the non-associative flow law on the bearing capacity of shallow foundations on rock masses and proposes a correction coefficient to estimate the variation in bearing capacity based on the flow law function.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Civil
Morteza Askari, Ahad Bagherzadeh Khalkhali, Masoud Makarchian, Navid Ganjian
Summary: This research found that the material type, thickness, and depth of a thin layer have significant effects on the ultimate bearing capacity and stiffness of a soil-footing system. A weak thin layer decreases both capacity and stiffness, while a strong thin layer increases them.
GEOMECHANICS AND ENGINEERING
(2021)
Article
Engineering, Geological
Abhishek Ghosh Dastider, Prasenjit Basu, Santiram Chatterjee
Summary: This research studied the influence of footing aspect ratio on the limit bearing capacity and failure mechanism in saturated, structured clays. Advanced finite-element analyses were used to investigate the effects of footing aspect ratio and footing-soil interface conditions on soil destructuration. The results showed a 30%-35% reduction in the limit bearing capacity of shallow foundations due to soil destructuration.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2023)
Article
Engineering, Civil
Yao Xiao, Minghua Zhao, Rui Zhang
Summary: The article presents the seismic bearing capacity for strip footings above square voids in cohesive-frictional soils. Through numerical study using adaptive finite element limit analysis (AFELA), the upper bound (UB) and lower bound (LB) of the seismic bearing capacity for the strip footing are obtained, with relative errors within 8% or less. The results are presented in design tables and charts for designers and practicing engineers to use. The effects of void location, dimensionless strength ratio, soil internal friction angle, and horizontal seismic coefficient on the seismic bearing capacity are examined, and failure mechanisms and comparisons with previous static studies are discussed.
EARTHQUAKE SPECTRA
(2023)
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
Engineering, Civil
Pezhman Fazeli Dehkordi, Mahmoud Ghazavi, Usama F. A. Karim
Summary: Geocell reinforcement improves the load-deformation behavior of shallow foundations, as demonstrated through large-scale plate load tests. The effects on stiffness, bearing capacity, load dispersion, and strain-stress behaviors are discussed, leading to a simplified analytical procedure for predicting the bearing capacity of circular footings on geocell-reinforced sand. Different shear failure mechanisms and deformation monitoring are taken into consideration in this analytical approach.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
E. Cascone, G. Biondi, O. Casablanca
Summary: A rigorous and practical solution for assessing the bearing capacity of shallow strip footings in plane strain conditions considering the effect of groundwater using the method of characteristics has been developed. The proposed bearing capacity factor depends on various factors and a corrective coefficient has been introduced for normalization. Empirical relationships have been proposed for smooth and rough foundations, and the solutions have been validated against finite element analyses.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Geological
Pragyan Paramita Das, Vishwas. N. N. Khatri
Summary: A prediction model for estimating the bearing capacity of strip and ring footings in layered sand was proposed using soft computing approaches, namely artificial neural network (ANN) and random forest regression (RFR). The model was prepared using data generated from finite elements limit analysis with varying properties of the top and bottom layers. The performance measures indicated that the RFR model outperformed the ANN model, and an analytical model was also developed and shown to agree with published experimental data.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Ocean
P. Hu, C. Leo, S. Liyanapathirana
Summary: This study investigates the bearing capacity of conical footings in clay using numerical methods. Factors such as embedment ratio, foundation-soil interface roughness, conical angle, and soil strength are considered. The results present and discuss the effects of these factors on the horizontal bearing capacity, providing new solutions to improve design practices.
APPLIED OCEAN RESEARCH
(2022)
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
Engineering, Civil
Fei Han, Mehdi Marashi, Monica Prezzi, Rodrigo Salgado, Timothy Wells, Mir Zaheer
Summary: This paper reports the results of a live load test on the Sagamore Parkway bridge over the Wabash River in Indiana. The main goal of the test was to study load transfer and verify design assumptions, using vibrating-wire strain gauges and loaded trucks.
TRANSPORTATION RESEARCH RECORD
(2021)
Editorial Material
Engineering, Geological
Rodrigo Salgado
Summary: Dr. Rudolph Bonaparte delivered the 54th Terzaghi Lecture at IFCEE 2018 in Orlando, Florida on March 8th, 2018. This introduction briefly reviews Dr. Bonaparte's contributions to geotechnical engineering and discusses some of the highlights of the corresponding paper.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2021)
Article
Engineering, Geological
Ruben D. Tovar-Valencia, Ayda Galvis-Castro, Rodrigo Salgado, Monica Prezzi
Summary: Limited research has been done on the effects of base geometry on pile resistance calculations in sand, leading to practical design methods not considering these effects. Experimental tests showed that adding a conical base to a pile changes the deformation pattern in the sand below the base during loading, resulting in lower base resistances compared to piles with a flat base. The study also has implications for using cone resistance from the cone penetration test (CPT) in estimating pile base resistance.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
Vibhav Bisht, Rodrigo Salgado, Monica Prezzi
Summary: This paper presents a methodology for computing the response of a rigid strip footing in incompressible Tresca soil when loaded to large settlements. The efficacy of the proposed method is demonstrated through numerical simulations and the application of the non-linear extension to the B-bar method in mitigating volumetric locking. The effectiveness of the method is illustrated through comparisons with other numerical solutions in the literature.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Engineering, Geological
Qian Hu, Fei Han, Monica Prezzi, Rodrigo Salgado, Minghua Zhao
Summary: The increasing demand for renewable clean energy has led to rapid growth in offshore wind energy development. A new design method that considers three-dimensional pile-soil interaction and is suitable for different conditions has been developed through finite-element analysis.
Article
Engineering, Geological
Qian Hu, Fei Han, Monica Prezzi, Rodrigo Salgado, Minghua Zhao
Summary: Most design methods for laterally loaded monopiles were developed for uniform soil profiles, which may lead to incorrect capacity estimations in layered sand profiles. In this study, three-dimensional finite-element analyses were conducted to investigate the impact of soil layering on the response of monopiles to lateral loads and develop a design method applicable to layered soil profiles.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2022)
Article
Engineering, Geological
Firas H. Janabi, Venkata A. Sakleshpur, Monica Prezzi, Rodrigo Salgado
Summary: Schmertmann's method is suitable for estimating settlement of footings on single, uniform sand layers, but lacks information for layered sands. The study modified the method for two-layered sands and proposed new influence diagrams and settlement calculation methods.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2022)
Article
Engineering, Geological
Ruben D. Tovar-Valencia, Ayda Galvis-Castro, Rodrigo Salgado, Monica Prezzi, Daniel Fridman
Summary: This study investigates the effects of particle crushing during installation of driven or jacked piles in sand. Experimental results show that sand particles crush primarily along irregularities and sharp edges during the driving or jacking process. The degree of particle crushing is related to the load mobilized at the base of the pile and three breakage parameters.
Article
Engineering, Geological
Firas H. Janabi, Rameez A. Raja, Venkata A. Sakleshpur, Monica Prezzi, Rodrigo Salgado
Summary: This paper presents the results of load tests on model strip and square footings in silica sand, which showed a significant relationship between footing penetration resistance and embedment depth. The digital image correlation technique was used to analyze the displacement and strain contours below and around the footing base during penetration.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2023)
Article
Engineering, Geological
Ayda C. Galvis-Castro, Ruben D. Tovar-Valencia, Monica Prezzi, Rodrigo Salgado
Summary: This paper presents the results of compressive and cyclic load tests on a closed-ended jacked model pile conducted in a calibration chamber with image analysis capabilities. The tests revealed that cycling can significantly reduce the ultimate unit base resistance and increase the unit base resistance at plunging. The changes in unit base resistance are related to factors such as sand particle flow, crushing, and dilative behavior during cyclic loading.
Proceedings Paper
Engineering, Civil
Venkata A. Sakleshpur, Eshan Ganju, Rodrigo Salgado, Monica Prezzi
Summary: This paper presents a statistical methodology for estimating the optimal spacing between CPT soundings in a logical and easy way in geotechnical practice. The method quantifies the variability of a site in the horizontal direction through a horizontal variability index.
GEO-CONGRESS 2022: SITE AND SOIL CHARACTERIZATION, COMPUTATIONAL GEOTECHNICS, RISK, AND LESSONS LEARNED
(2022)
Proceedings Paper
Engineering, Civil
Ruben D. Tovar-Valencia, Ayda Galvis-Castro, Monica Prezzi, Rodrigo Salgado
Summary: This paper studies the effect of base geometries (flat and conical) on the base resistance of model piles in sand. The results show that adding a conical base significantly changes the deformation pattern of the sand and the magnitude of the unit base resistance during loading.
GEO-CONGRESS 2022: DEEP FOUNDATIONS, EARTH RETENTION, AND UNDERGROUND CONSTRUCTION
(2022)
Proceedings Paper
Engineering, Civil
Ruben D. Tovar-Valencia, Ayda Galvis-Castro, Monica Prezzi, Rodrigo Salgado
Summary: This paper discusses the impact of surface roughness on the results of static load tests on steel piles, using DIC processing of images to study the interaction between the piles and the soil.
IFCEE 2021: INSTALLATION, TESTING, AND ANALYSIS OF DEEP FOUNDATIONS
(2021)
Proceedings Paper
Engineering, Civil
Eshan Ganju, Fei Han, Monica Prezzi, Rodrigo Salgado
Summary: This study compares the results of an instrumented static load test on a CEP in a gravelly sand layer with estimates from CPT-based pile design methods, finding that predictions tend to overestimate pile capacity in soil profiles with high gravel content by a factor ranging from 1.2 to 2.6. Additional high-quality SLT cases in gravelly soil profiles are reviewed to provide context for the observations.
IFCEE 2021: INSTALLATION, TESTING, AND ANALYSIS OF DEEP FOUNDATIONS
(2021)
Proceedings Paper
Engineering, Civil
Fei Han, Monica Prezzi, Rodrigo Salgado
Summary: This paper presents the results of rigorous numerical analyses of small and large non-displacement pile groups subjected to axial loads in sand. The finite-element analyses were performed using a realistic two-surface-plasticity constitutive model for sand implemented in ABAQUS. The study found that the overall group efficiency for different pile groups varied at different settlement levels, and the efficiency of individual piles depended on the location of the pile in the group, settlement level, and sand density.
IFCEE 2021: INSTALLATION, TESTING, AND ANALYSIS OF DEEP FOUNDATIONS
(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)
