Article
Engineering, Environmental
Reza Agha Mohammadi Nazari, Ali Ghanbari
Summary: This study presents a new formula to predict the earthquake-induced displacement of reinforced slopes with one row of piles. The formula is developed based on numerical simulations and statistical analysis. The findings suggest that the piles should be installed in the upper-middle part of the slope to minimize displacement, and there is an optimal pile length. It is also noted that coupled analysis computes higher values for slope displacement compared to rigid or decoupled analysis.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Engineering, Geological
Xi Xu, Yu Huang
Summary: A parametric study was conducted on the seismic stability of pile-anchor slope reinforcement structures for earth retaining wall, determining optimal design suggestions including parameters such as pile embedment, pile thickness, anchor position, anchor free length, anchor direction, and anchor prestress. Numerical research found that for generalized vertical soil slopes, the best embedded depth typically occupies 30% of the whole pile length, with a pile thickness of 1.5-2 meters recommended for superior shear and bending strength, as well as other optimized parameters identified.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Construction & Building Technology
Yanyan Li, Zhuqiang Chu, Le Zhang, Yujie He
Summary: In earthquake-prone areas, pile-anchor structures are widely used for slope reinforcement due to their reliable performance. This study focuses on the dynamic behavior of a pile-anchor slope system using the finite element method, and simulates the progressive failure processes of piles using the extended finite element method. The findings suggest that the pile-anchor structure exhibits improved seismic performance compared to the pile structure.
Article
Computer Science, Interdisciplinary Applications
Cheng Li, Lijun Su, Hongjian Liao, Chonglei Zhang, Siyou Xiao
Summary: This study proposes a novel method for the rapid evaluation of seismic stability of soil slopes by using finite element limit analysis and a parametric method to study safety factors and critical accelerations. The results show that the proposed method is reliable and efficient for evaluating the stability of soil slopes.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Liang Li, Chunli Li, Jiahui Wen, Guangming Yu, Yungming Cheng, Liang Xu
Summary: The paper introduces an effective and efficient swarm response surfaces method for locating slip surfaces. Compared to the full search method, the proposed method requires much less time and effort while providing accurate results. However, significant discrepancies in slip surfaces and primary sliding directions are observed among different methods, highlighting the need to consider these variations in seismic slope risk assessment using swarm response surfaces.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Environmental
Lianjin Tao, Zhibo Jia, Jin Bian, Ming Shi
Summary: This study investigates the passive effect of stabilizing piles on slope stability under seismic conditions. A new method of equivalent displacement is proposed to establish the relationship between slope displacement and pile force. Through case analysis, it is found that stabilizing piles exhibit obvious passivity and slopes have a cumulative effect under multiple seismic loads. The location of the pile and the length of the anchoring section significantly influence slope stability.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Engineering, Geological
Jian Song, Zhuxi Lu, Yuhang Pan, Jian Ji, Yufeng Gao
Summary: This study developed an extended model to investigate the multi-slip seismic displacements of bedding rock slopes. The results showed that the multi-slip failure evolution is different from the traditional method, and the dip angle of sliding planes and vertical ground motion have significant effects on the sliding displacement.
Article
Engineering, Geological
Jian-Feng Chen, Chang-Cheng Du, Ming Peng, Rui Sun, Fei Zhao, Zhen-Ming Shi
Summary: Anchor cables and piles are widely used to improve the stability of slopes under seismic loading. System reliability analysis is crucial for assessing the stability of slopes stabilized with anchor cables and piles due to uncertainties and complex interactions. A new approach considering the effect of local anchor cables and piles failure on the system was proposed. The failure of local anchor cables and piles significantly increases the failure probability of the remaining anchor cables, piles, and slopes, leading to cascading failures. The proposed approach provides a precise value for system failure probability and is more convenient for assessing the reliability of slopes stabilized with anchor cables and piles.
Article
Engineering, Geological
Ali Fallah Yeznabad, Sheri Molnar, M. Hesham El Naggar, H. Ghofrani
Summary: This study investigates the seismic stability of slopes in the Lower Mainland, British Columbia, using a probabilistic solution. It utilizes various seismicity sources and sliding displacement prediction models to determine the probabilistic values of slope displacement at 10 sites. Regional interpolation models are developed using regression analysis to estimate the probabilistic values of slope displacement and seismic coefficient.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Geological
Aleksandra Korzec, Robert Jankowski
Summary: The paper discusses the dynamic behavior of a simple slope model subjected to horizontal and vertical excitations, introducing a new method validated by experiments. Results show that vertical acceleration may have a significant impact on the stability of the slope.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Engineering, Geological
Yu -Wei Hwang, Ellen M. Rathje
Summary: This study conducted two-dimensional nonlinear finite element analyses to investigate seismic deformation patterns of soil slopes. The results showed that deeper sliding masses experience notable strain localization at the sliding mass depth, while shallow sliding masses experience more distributed straining throughout the entire soil mass. The numerical simulations also revealed that factors such as shear wave velocity, slope height, and slope angle significantly affect the resulting displacements of the slopes.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Yangjuan Bao, Hongqiang Hu, Gang Gan
Summary: This study systematically analyzed the effects of pulse-like ground motions on the seismic responses of slope systems reinforced by pile-anchor structures. The results showed that pulse-like ground motions significantly aggravated the seismic responses and decreased the stability of the system. A shaking scenario using semi-artificial ground motions generated by wavelet analysis was conducted to further investigate the effects of different components in pulse-like ground motions. These findings contribute to a better understanding of the seismic behavior of slopes and pile-anchor structures near faults and provide a basis for seismic design in earthquake-prone regions.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Xiaodong Fu, Wenjie Du, Qian Sheng, Jian Chen, Qiang Fang, Yongqiang Zhou
Summary: The Newmark sliding block method combined with block theory can be used to evaluate the dynamic stability of a rock block; frequent changes in the position of a rock block under seismic action may affect the contact areas and contact modes of sliding faces; extending the dynamic Newmark method can better reflect the dynamic response of a rock block under seismic action.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2021)
Article
Environmental Sciences
Changcheng Du, Jianfeng Chen, Sixian Chen, Ming Peng, Zhenming Shi
Summary: A numerical study using three-dimensional finite-element method was conducted to investigate the stability of a landslide in northern Sichuan Province, China. The results show that the combination of piles and anchor cable frame beams is more effective in improving slope stability compared to using anchor cable frame beams alone. The proportion of thrust shared by piles increases during slope destabilization, while the proportion shared by anchor cables decreases. Increasing pile length improves slope stability, but excessive embedded length has little effect. The critical pile spacing is found to be 2.5 times the width of the pile section.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Computer Science, Interdisciplinary Applications
Li Lu, Yu-Liang Lin, Dong-Dong Guo, Hao Xing, Zhen Zhang, Jun-Yi Duan
Summary: This study establishes the dynamic kinematic failure mechanism and instant displacement model for slope reinforced by prestressed anchors within infinitesimal time. A time-dependent formula for dynamic yield acceleration is deduced, and a modified method for determining the seismic permanent displacement in the framework of Newmark block theory is proposed. The results show continuous increases in anchor force, dynamic yield acceleration, and seismic displacement during seismic ground motion excitation.
COMPUTERS AND GEOTECHNICS
(2023)
Review
Engineering, Civil
Yu Huang, Bei Zhang
Summary: Flow-structure interaction is crucial for preventing geo-disasters, and physical modeling is challenging due to complex rheology, transient nature, and nonlinear response. Hierarchical scaling and coupled modeling are recommended to address key issues, while investigating the impact of Coriolis effect. Robust numerical tools are also recommended for experiment design and mechanism exploration.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Engineering, Civil
Yu Huang, Bei Zhang
Summary: Debris-flow disaster has caused significant casualties and economic losses. The design strategy for disaster prevention should focus on improving impact force estimation, run-up height prediction, failure analysis, and plain configuration planning. Current methods mostly rely on hydraulic theory, lacking consideration for physical mechanisms, such as nonstationary flow regimes, impact patterns, and barrier characteristics. Physically based design strategies and robust physical modeling methods and numerical simulation tools are needed to understand flow-structure interaction mechanisms and verify structure design strategies. Additionally, the resilience-based disaster prevention concept should be emphasized for effective preparedness, response, and recovery.
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
(2022)
Article
Engineering, Geological
Liuyuan Zhao, Yu Huang
Summary: Experiments were conducted to study the dynamic and thermal characteristics of rockslide motion utilizing a model slope with sliding blocks of varying parameters. Impact heating was found to be substantially higher than frictional heating, with factors such as velocity, contact stiffness, and mass of the sliding block affecting temperatures during sliding. The rapid dissipation of impact heat within a short time frame provides meaningful information for disaster prevention measures and studies on landslides.
Article
Engineering, Geological
Hongqiang Hu, Yu Huang, Liuyuan Zhao, Min Xiong
Summary: This study investigates the stochastic seismic responses of a slope reinforced by an anchored pile structure through shaking table tests. It is found that under random excitation, the seismic responses of the slope exhibit significant variability. The use of probabilistic methods allows for a more reliable assessment of the slope's seismic response.
Editorial Material
Environmental Sciences
Yu Huang, Jin Sun, Chongqiang Zhu
Article
Environmental Sciences
Hao Shi, Yu Huang
Summary: This article describes a multiphase extension of the delta-plus-SPH model for modeling non-Newtonian multiphase flow. Modifications are made to improve the accuracy and stability, including a modified numerical diffusive term and a special shifting treatment near the phase interface. The Herschel-Bulkley model is used to describe non-Newtonian fluids, and a sub-particle term is added in the momentum equation for large eddy simulation. The GPU acceleration technique is applied for computational efficiency. Tests show that the proposed SPH model can accurately capture highly transient incompressible two-phase flows with consistent pressure across the interface.
Article
Computer Science, Interdisciplinary Applications
Yu Huang, Zhengying He, Atsushi Yashima, Zhiyi Chen, Chunxiang Li
Summary: A framework for multi-objective optimization design of Pile-anchor structures (PAS) in slopes is proposed in this study, considering the uncertainty of soil properties. The framework incorporates reliability theory and Monte Carlo simulations to account for the spatial variability of soil properties. An illustrative example demonstrates that the optimal PAS design achieves minimum failure probability and lowest total cost.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Geological
Bei Zhang, Yu Huang
Summary: This study investigates the impact dynamics of granular flows against a baffle array and proposes a jet-based model for baffle design. The results show that the energy loss due to interparticle interaction increases with the Froude number and the hard contact of larger particles and the arching effect of debris-baffle interaction are important to impact dynamics on baffle structure.
Article
Engineering, Geological
Suran Wang, Yu Huang
Summary: This study investigated the evolution of shear characteristics of quartz sand subjected to high temperatures in long-runout landslides. The results revealed that high temperature exposure caused the quartz sand to easily break and undergo density changes. Additionally, particle size had a significant impact on the residual shear stress and shear stress fluctuation amplitude, while the presence of copper-gold-iron in the samples after heat treatment had adverse effects on the shear properties of the sand.
Article
Geosciences, Multidisciplinary
Hualin Cheng, Martin Mergili, Yu Huang
Summary: This study uses a numerical model to analyze the flow and sediment erosion processes of debris flows. The results show that the erosion models accurately predict the movement and channel erosion of the debris flows, and the most serious sediment erosion occurs along the sides of the channels. In addition, the model is applied to predict the dynamical behavior and bulking process of a specific debris flow, showing an increase in discharge and hazard intensity due to sediment erosion. This study provides more scientific basis for risk assessment and hazard mitigation of large-scale debris flows in mountainous areas.
Article
Geosciences, Multidisciplinary
Yu Huang, Hao Shi, Bei Zhang
Summary: In mountainous areas, rock avalanches can cause large impact forces on structures. Baffle systems are commonly used in torrent channels to dissipate flow energy and minimize destructive effects. This paper presents a crown-like baffle system that effectively dissipates flow energy through particle-particle interaction. The results show that the proposed baffle system can reduce the residual kinetic energy by up to 18.75% compared to a conventional baffle system, making it a cost-effective solution.
JOURNAL OF EARTH SCIENCE
(2023)
Article
Engineering, Geological
Yu Huang, Boyu Fu, Zhen Guo, Atsushi Yashima
Summary: In this paper, a modified deformation coordination model is proposed to accurately calculate the internal force of anchored piles. The interaction between the anchor and pile is divided into two stages: the application of prestressed anchor cables and the action of landslide thrust. Using the virtual work principle and graph multiplication theory, a deformation coordination equation is established and the calculation formula for anchor cable tensile stress is obtained. An engineering case study demonstrates the capability of the proposed model to calculate the internal force of anchored piles.
SOILS AND FOUNDATIONS
(2023)
Article
Engineering, Geological
Yu Huang, Zhengying He
Summary: This study proposes a novel methodology for implementing rainfall-resilient design for slope systems by combining the resilience design philosophy and stability analysis. The design-oriented resilient criterion and recovery strategies for slope systems are analyzed and compared with traditional design criteria. This rainfall-resilient design can effectively support landslide mitigation in the coastal area of Southeast China.
SOILS AND FOUNDATIONS
(2023)
Article
Computer Science, Interdisciplinary Applications
Dianlei Feng, Can Yi, Man Hu, Tao Gao, Yu Huang
Summary: In this study, a new soil turning numerical model based on the SPH method has been proposed, and an elastoplastic constitutive model has been implemented. The model was validated through a landslide benchmark test and a combined experimental numerical investigation on the soil turning process. The results show that the proposed SPH model can accurately reproduce the soil turning process.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Civil
Chongqiang Zhu, Hualin Cheng, Yangjuan Bao, Zhiyi Chen, Yu Huang
Summary: This study investigated the effects of horizontal pulse-like motion and vertical component on the dynamic response of slopes through shaking table tests. The results showed that the vertical component has limited influence on seismic response under pulse-like ground motion, but it greatly enhances the response under ordinary horizontal motion. It is important to pay attention to vertical ground motion, especially when its horizontal component is ordinary ground motion.
GEOMECHANICS AND ENGINEERING
(2022)
Article
Engineering, Geological
Shaohui Liu, Lizhong Jiang, Wangbao Zhou, Jian Yu
Summary: This study evaluates the post-earthquake damage to track-bridge systems by conducting nonlinear time history analysis on a CRTS II ballastless track simply-supported beam system subjected to transverse earthquake loading. It explores the characteristics of residual displacement and stiffness degradation of the track-bridge system under transverse earthquakes. The research investigates the effect of earthquake-induced stiffness degradation on high-speed trains and proposes a reconstruction method for earthquake-induced dynamic irregularity characteristic curve considering probability guarantee rates. The results indicate that earthquake-induced dynamic irregularity can effectively quantify the running performance of high-speed trains under earthquake-induced stiffness degradation conditions.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Rui Zhang, Xiangqian Sheng, Wenliang Fan
Summary: This study introduces a novel approach for the probabilistic assessment of seismic earth pressure against nonlinear backfills. Nonlinear upper bound analysis is used to obtain the seismic earth pressure through optimization procedure, and probability analysis of nonlinear backfill properties is considered by combining adaptive dimension decomposition with the direct integral method.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Qiangqiang Sun, Yu Xue, Menghao Hou
Summary: This study investigated the use of Tire-derived aggregate (TDA) as backfill material for geotechnical seismic isolation in utility tunnels. Nonlinear numerical analyses were conducted, and the results showed that TDA backfill was an excellent alternative for risk mitigation during strong earthquakes, significantly reducing deformation and forces. The proposed system could potentially save costs compared to expensive seismic mitigation measures.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Yan-Guo Zhou, Dong-Chao Zhang, Kai Liu, Yun-Min Chen
Summary: This study investigated the large deformations caused by liquefaction in sloping ground and the methods for evaluation and mitigation. Soil element tests and centrifuge model tests were conducted to study the relationship between residual strain and Post-liquefaction Deformation Potential (PLDP). The tests showed that the developments of residual strain were controlled by PLDP, which is correlated with the maximum cyclic shear strain. The applicability of PLDP was verified in model tests, and the mitigation mechanisms of densification and drainage induced by stone columns were observed.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jiajin Zhao, Zhehao Zhu, Dexuan Zhang, Hao Wang, Xi Li
Summary: This paper studies the fabric properties during sand liquefaction using 3D constant-volume cyclic triaxial DEM tests. The results show good consistency with experimental data. The evolution of fabric characteristics is assessed using the coordination number and mechanical coordination number. The second-order contact normal fabric tensor is introduced to analyze complex inter-particle contacts and the shear strain is used as a bridge to describe the evolution of coordination number and anisotropy degree.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jinqiang Li, Zilan Zhong, Shurui Wang, Kaiming Bi, Hong Hao
Summary: The corrosion-protection liner technology improves the seismic performance of water supply pipelines and reduces the failure probability under earthquake excitations.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Abdellah Cherif Taiba, Youcef Mahmoudi, Mostefa Belkhatir
Summary: This article provides a comprehensive analysis of Liu et al.'s (2023) published paper in the Soil Dynamics and Earthquake Engineering journal, which examines the impact of particle shape on the wave velocity of sand. By enhancing the content integrity, this article serves as a valuable discussion piece for readers interested in this research topic.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Weijian Zhong, Binbin Li, Yanhui Liu, Ping Tan, Fulin Zhou
Summary: In this paper, the Flexible Limit Protective Device (FLPD) was improved to a Flexible Energy Dissipating Device (FEDD) to better control the seismic response of base-isolated structures. Experimental investigation and numerical simulation were conducted to study the compression behavior and optimize the design of FEDDs. The results showed that FEDDs with optimal parameters effectively reduced isolator displacements and kept the inter-story drift angle within a safe range during earthquakes.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Xinhua Xue, Xiaojie Yuan, Li Tao
Summary: In this study, gene expression programming (GEP) was used to establish the relationship between the capacity energy required to trigger sand liquefaction and several major parameters. The GEP model showed higher accuracy and better performance compared to existing models, as confirmed by experimental data.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Xiao-ling Zhang, Hao Lan, Xian-hui Zhao, Cheng-shun Xu, Ke-min Jia
Summary: The study investigates the reinforcement principle of inclined liquefiable site using concrete pile and gravel pile methods. The results show that concrete piles have a better reinforcement effect on inclined liquefiable site compared to gravel piles, and increasing the diameter of gravel piles greatly improves the reinforcement effect. The pile group reinforcement model is more effective in reducing lateral displacement of the site soil compared to the single pile reinforcement model.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jinxin Sun, Haoyu Sun, Mengmeng Lu, Bolin Han
Summary: The implementation of stone columns is an effective way to improve the stability of liquefiable soil. However, existing mathematical models often neglect vertical seepage within the soil, leading to calculation errors. This study proposes a new mathematical model that considers both radial and vertical seepage, and conducts a parameter analysis to investigate the effects of column spacing, cyclic stress ratio, and consolidation parameters on excess pore water pressure.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jonathan F. Hubler, James P. Hanley, Andrew C. Stolte, Liam Wotherspoon, Kyle M. Rollins
Summary: This study performed blast liquefaction tests in an area that experienced extensive liquefaction. It used multi-channel analysis of surface waves (MASW) testing to evaluate changes in shear wave velocity (VS) before and after blasting. The study found that array length has an impact on the immediate changes in VS following blasting, but these changes decrease at 24 hours post-blast.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Lowell Tan Cabangon, Gaetano Elia, Mohamed Rouainia, Suraparb Keawsawasvong, Teraphan Ornthammarath
Summary: The impact of far-field earthquakes on underground structures, especially tunnels, has been relatively less explored compared to near-field earthquakes. However, the study found that far-field earthquakes can generate forces in tunnel lining that are equally destructive as those induced by near-field motions, especially when they contain long-period waves. The amplification of these ground motions in soft natural clays, common in Bangkok, can lead to significant soil displacements and shear strains.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Jinjun Hu, Longbing Ding, Xutong Zhou, Mingji Liu, Jingyang Tan
Summary: Offshore near-fault ground motions during the 2016 OffMie Mw6.0 earthquake in the Nankai Trough of Japan were studied using data from the DONET1 seafloor seismic network. The results show that offshore spectral acceleration and peak ground velocity are higher than onshore values. Analysis of pulse-like ground motions reveals differences in amplitude, frequency content, and energy between offshore and onshore motions. These findings have implications for seismic design of offshore engineering structures.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
Article
Engineering, Geological
Radu Popescu, Pradipta Chakrabortty
Summary: The natural spatial variability of soil properties affects the mechanical response of geotechnical structures and can deviate failure surfaces. For soil liquefaction induced by seismic activity, it has been found that greater excess pore water pressure is generated in soils with small-scale variability. This paper provides an explanation based on centrifuge experiments and numerical simulations, showing that partial drainage during earthquakes may trigger softening of dilative soils.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2024)
