Article
Engineering, Geological
Xidong Zhang, Adrian R. Russell, Xiaoqiang Dong
Summary: Adding tension-resistant fibers to cohesionless soils can effectively strengthen the soils and increase their liquefaction resistance. Shaking table tests showed that fiber reinforcement can slightly delay and reduce excess pore pressure accumulation, as well as attenuate the degradation of acceleration amplitudes and stiffness. However, the benefits of this reinforcement technology may be minor when the fiber-reinforced soil is at shallow depths.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Xiaolei Wang, Hai Ren, Run Liu, Libo Liu, Lin Dong, Yuchen Jiang, Zengpei Liu, Keke Li
Summary: Offshore wind power is a novel, renewable, and efficient source of energy, which has attracted global attention. Research has shown that offshore wind power significantly enhances the liquefaction resistance of marine saturated sand foundations exposed to seismic waves as loads. This study conducted a series of shaking table tests to investigate the load-induced enhancement of the liquefaction resistance of sand. Real-time monitoring of excess pore pressures at different buried depths was carried out, and the variations were analyzed. The results demonstrated that load inhibits sand liquefaction at the near-end area, while it facilitates sand liquefaction at the far-end area. The study also proposed a liquefaction constant and quantified its influencing range.
Article
Engineering, Geological
Xuanming Ding, Yanling Zhang, Qi Wu, Guangwei Cao, Zhixiong Chen
Summary: This study investigated the influence of groundwater level on the seismic response of coral islands through shaking table tests. The results showed that the rise in groundwater level decreases the natural frequency of coral foundation-structure system, increases the damping ratio, has a softening effect on the ground, and leads to increased settlement and horizontal displacements of the structure, while the impact on column bending moment response is minimal.
Article
Engineering, Geological
Roohollah Farzalizadeh, Araz Hasheminezhad, Hadi Bahadori
Summary: Through a series of 1 g shaking table tests, the study showed that increasing the relative density and the number of wall-type gravel and rubber drains in liquefiable silty sand can reduce settlement, liquefaction-induced deformations, excess pore water pressure, and ultimately improve liquefaction resistance. Results also indicated that reinforced silty sand with wall-type gravel drains exhibited less excess pore water pressure and settlement compared to wall-type rubber drains.
GEOTEXTILES AND GEOMEMBRANES
(2021)
Article
Engineering, Civil
Qi Wu, Xuanming Ding, Zhixiong Chen, Yanling Zhang
Summary: This study investigates the seismic response of coral sand site through shaking table tests and finds that coral sand liquefaction is more difficult compared to quartz sand. The number of piles and shaking intensity play significant roles in the seismic response characteristics of coral sand site.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Geological
R. Alaie, R. Jamshidi Chenari, M. Karimpour-Fard
Summary: The sand-expanded polystyrene beads mixture is a new geo-material with high compressibility and great energy dissipation capability. Shaking table tests showed that adding EPS beads to sand can reduce induced peak acceleration and deformations caused by dynamic loading. Moreover, an increase in EPS content results in higher damping ratio and lower shear modulus in the sand-EPS bead mixtures.
GEOSYNTHETICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Darn-Horng Hsiao, Chung-Chieh Lin
Summary: To investigate the effects of plastic fines properties on pore water pressure generation during cyclic loadings, 29 sets of test data from literature and another 21 reconstituted specimens were used. Results showed that clean sands had slow, stagnated, then accelerated pore water pressure ratios until initial liquefaction, while plastic soils with a plastic index greater than 5 had sharp increase in initial stage. Furthermore, cyclic stress ratio of specimens containing plastic fines increased by 1.5-3.0 times more than non-plastic fines. Results were analyzed using a mathematical model, which clarified previous arguments.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Geological
Ayse Edincliler, Ozgur Yildiz
Summary: The effectiveness of a new proposed geotechnical seismic isolation material, EPS beads-sand mixtures, on the seismic performance of medium-rise buildings was evaluated by shake table tests. The results showed that the utilization of EPS beads-sand mixture layer significantly reduced peak accelerations and inter-story drifts, making it a potential seismic isolation material.
BULLETIN OF EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Mohammad Hassan Baziar, Alireza Khoshniazpirkoohi, Omid Eslami Amirabadi
Summary: This study investigates the effects of two biomaterial solutions on liquefaction and lateral spreading in a sandy layer through six shaking table tests. The results showed that the use of biogas bubbles can effectively reduce liquefaction, increase soil shear wave velocity and liquefaction energy capacity, and decrease surface displacements and volumetric strains.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2022)
Article
Chemistry, Physical
Zhiyong Yin, Haifeng Sun, Liping Jing, Rui Dong
Summary: This study conducted a large shaking table test on a 1/4 single-story masonry structure model with and without a GSI-RSM system, and found that the GSI-RSM system can reduce the seismic response of buildings. The isolation effect of the system is low in small earthquakes and increases with increasing earthquake magnitude.
Article
Green & Sustainable Science & Technology
Erxing Peng, Zheng Hou, Yu Sheng, Xiaoying Hu, Dingwen Zhang, Li Song, Yaling Chou
Summary: This study analyzes the anti-liquefaction characteristics of sand partially saturated after biogas-induced desaturation through shaking table tests. The results show that desaturation can mitigate sand liquefaction and enhance liquefaction resistance. The use of biogas bubbles for desaturation is an effective, pollution-free, and environmentally friendly liquefaction mitigation method that aligns with the principles of green/sustainable engineering and pollution reduction.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Geological
Nurhan Ecemis, Hadi Valizadeh, Mustafa Karaman
Summary: Buried pipelines in liquefiable soils are susceptible to floating during earthquakes, making it crucial to choose appropriate backfill materials. Scrap tire-soil mixtures have been utilized to mitigate liquefaction effects on pipelines, reducing excess pore water pressure and predicting uplift probability.
BULLETIN OF EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Civil
Chen Guoxing, Wu Qi, Sun Tian, Zhao Kai, Zhou Enquan, Xu Lingyu, Zhou Yanguo
Summary: The study investigates the liquefaction mechanism and susceptibility of sand-gravel mixtures under undrained cyclic loading, and introduces the average flow coefficient (k(a)) as an index to describe the fluidity of the mixtures. It also proposes a new liquefaction mechanism for these mixtures. The research shows a negative correlation between the cyclic resistance ratio (CRR) and the skeleton void ratio (e(sgk)), with particles smaller than 0.25 mm and mass contents less than 30% primarily serving as fillers of intergranular voids in the mixtures.
JOURNAL OF EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Civil
Chong Yue, Ke Liang, Chengshun Xu, Xiuli Du
Summary: In this study, undrained cyclic torsional shear tests were conducted to study the effect of cyclic loading frequency on the deformation properties of saturated Fujian sand. The test results showed that the shear modulus and damping ratio decreased with an increase in cyclic loading frequency in the shearing contractive and late shearing dilative periods. A modified method for calculating the damping ratio was proposed to compensate for analytical errors caused by the non-closure of hysteresis loop. The results showed that the modified method provided higher values for the damping ratio than the traditional method.
Article
Engineering, Civil
Yan-ling Zhang, Cheng-long Wang, Xuan-ming Ding, Qi Wu
Summary: This study investigates the seismic stability of gravity retaining walls with coral sand backfill through shaking table tests. The results show that coral sand has higher liquefaction resistance compared to quartz sand, but the retaining walls still face risks of instability and damage under strong earthquakes.
CHINA OCEAN ENGINEERING
(2022)
Article
Engineering, Ocean
Ali Ghorbani, Reyhaneh Jahanpour, Hadi Hasanzadehshooiili
MARINE GEORESOURCES & GEOTECHNOLOGY
(2020)
Article
Chemistry, Physical
Mahdi Salimi, Ali Ghorbani
APPLIED CLAY SCIENCE
(2020)
Editorial Material
Construction & Building Technology
Ali Ghorbani
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2020)
Article
Engineering, Civil
Ali Ghorbani, Iman Hosseinpour, Mehdi Shormage
Summary: The study investigated the influence of stone columns and basal geosynthetic on deformations and stability of an embankment over soft deposit. The results showed that stone columns significantly reduced total deformations of the subsoil, while a high stiffness basal geogrid improved the stability of the embankment.
KSCE JOURNAL OF CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Ali Ghorbani, Hadi Hasanzadehshooiili, Amin Eslami
Summary: The study proposes a new, simple, and accurate method for predicting the ground reaction curve (GRC) of circular tunnels constructed in damaged, elastoplastic rock masses with softening in the plastic zone. The method takes into account the effects of deterioration caused by excavation/blast by assuming a reduced and varying Young's modulus using a disturbance factor.
ADVANCES IN CIVIL ENGINEERING
(2021)
Article
Engineering, Geological
Iman Hosseinpour, Ali Ghorbani, Javad Zarei, Sunil Ranjan Mohapatra
Summary: This research aims to investigate the behavior of granular column-reinforced soft soil under shear stress. Large-scale direct shear tests were performed, revealing that the use of granular column improves the shear resistance of the composite ground, especially at lower undrained shear strength of the soft clay. Additionally, the use of highly compacted column results in a decreased shear displacement, providing indirect evidence of stiffness improvement of the composite ground.
GEOMECHANICS AND GEOENGINEERING-AN INTERNATIONAL JOURNAL
(2023)
Article
Engineering, Geological
Amin Eslami, Ali Ghorbani
Summary: This study investigates the seismic response and liquefaction resistance of Monopile and Suction Bucket Foundations for offshore wind turbines using coupled numerical modeling and soft computing. Non-linear dynamic analysis and centrifuge studies were carried out to develop prediction models and verify their accuracy.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Environmental
Ali Shafiei, Mohammad Aminpour, Hadi Hasanzadehshooiili, Ali Ghorbani, Majidreza Nazem
Summary: The mechanical strength of calcium carbonate-enriched marl soil under the effect of freeze-thaw cycles was improved by introducing a combination of ordinary Portland cement and lignosulfonate. Microstructural investigations demonstrated the development of new calcium-aluminate-silicate-hydrate products and a denser structure with lower porosity. Various machine learning algorithms were employed for cost-effective and accurate prediction of the soil's strength.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Chemistry, Physical
Ali Ghorbani, Hadi Hasanzadehshooiili, Mohammad Ali Somti Foumani, Jurgis Medzvieckas, Romualdas Kliukas
Summary: Currently, there is no methodology to directly evaluate the liquefaction potential of saturated sand materials reinforced by cement grout-injected micropiles. Shaking table model tests were conducted to obtain data on pore water pressures, excess pore water pressure ratios, and the number of cycles required for soil liquefaction. Predictive equations for estimating excess pore water pressure ratios were developed using genetic programming and the least square method.
Article
Geochemistry & Geophysics
Ali Ghorbani, Amin Eslami
Summary: This study conducted a probabilistic seismic hazard assessment for Guilan Province in Iran, estimating peak ground acceleration and spectral acceleration over bedrock for the entire province. The results were compared with Iranian seismic code of practice and previous studies, highlighting the need for revisions in some areas.
PURE AND APPLIED GEOPHYSICS
(2021)
Article
Engineering, Geological
Ali Ghorbani, Hakimeh Rabanifar
Summary: Non-conventional materials, such as Lightweight Expanded Clay Aggregate (LECA), are commonly used to dissipate the energy of dynamic loads and mitigate liquefaction. The study found that adding 5% and 10% LECA to saturated sand resulted in a significant decrease in excess pore water pressure generation, while higher LECA content led to an increase in excess pore water pressure generation. The mechanisms behind these behaviors involve a contradiction in the effects of increasing soil mixture damping and reducing effective initial stress as a function of overall mixture density.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2021)
Article
Engineering, Civil
Amin Eslami, Ali Ghorbani, Seyed Vahid Shahraini
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2020)
Article
Engineering, Geological
Ali Ghorbani, Amin Eslami, Masoumeh Nezhad Moghadam
INTERNATIONAL JOURNAL OF GEOTECHNICAL ENGINEERING
(2020)
Article
Engineering, Geological
Ali Ghorbani, Amin Eslami, Mojtaba Ghasemi
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2019)
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)