Article
Engineering, Geological
Hanxu Zhou, Ailan Che, Renjie Zhu
Summary: Seismic landslides cause heavy casualties and economic losses as well as severe damage to the geo-environment. This study investigates the damage evolution of rock slopes under seismic motions using a scaled slope model and large-scale shaking table test. It is found that the damage degree within the slope is primarily controlled by the horizontal seismic motion and significantly developed in the area between slope shoulder and slope bottom.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Article
Engineering, Geological
Youngkyu Cho, Ellen M. Rathje
Summary: A generic predictive model for earthquake-induced slope displacement is developed based on finite-element analysis. The model characterizes the slope using yield acceleration, slip surface depth, and the natural period of the slope height. Peak ground velocity is found to be the most efficient parameter for displacement prediction. The developed model can be used for probabilistic seismic hazard analysis and deterministic earthquake scenarios in slope design and analysis.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2022)
Article
Engineering, Geological
Takaji Kokusho, Jiro Mori, Michinori Mizuhara, Huolang Fang
Summary: In this paper, a modified model free from numerical errors is used to analyze earthquake wave energies for slope sliding. The study presents a more reliable design chart for displacement that is uniquely correlated with earthquake wave energy. This method allows estimating displacement considering design parameters without the need for acceleration time-histories.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Nikolaos Alamanis, Panagiotis Dakoulas
Summary: Natural disasters, such as landslides and land subsidence, have serious social and economic consequences, particularly in Greece. This research examines the influence of inclination and spatial correlation lengths on the stability of slopes and the variation range of permanent earthquake movements. The results show that the spatial correlation of properties greatly impacts the permanent displacements of slopes caused by strong earthquake excitations.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Geological
Yingbin Zhang, Chenlin Xiang, Pengcheng Yu, Lianheng Zhao, John X. Zhao, Haiying Fu
Summary: The study investigated the effects of seismic activity on permanent displacements of slopes near fault lines. It was found that excitation, vertical ground motions, and slope azimuth all have significant influences on the computed displacements.
Article
Engineering, Geological
Weibing Gong, Dimitrios Zekkos, Marin Clark
Summary: This study presents a predictive methodology for regional earthquake-induced landslides using a pseudo-three-dimensional (pseudo-3D) procedure implemented on a digital elevation model (DEM). The methodology calculates seismic displacement for each grid cell in the DEM to predict the location and size of landslides. The results highlight the role of seismic displacement models in landslide prediction and the impact of strength parameters.
ENGINEERING GEOLOGY
(2023)
Article
Engineering, Geological
Arnkjell Lokke, Brian Carlton
Summary: Through extensive finite element analysis, seismic records, and soil profiles, the importance of multidirectional shaking on seismically induced permanent displacements has been identified. A simplified model was developed, showing a high correlation between unidirectional shaking displacements and those induced by multidirectional shaking.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Engineering, Geological
Mao-Xin Wang, Dian-Qing Li, Yong Liu, Wen-Qi Du
Summary: This study proposes a probabilistic decoupled approach to evaluate the seismic rotational displacement of earth slopes exhibiting rotational failure modes. By considering the depth-dependent variability of soil parameters and properly capturing the dynamic response of slopes, this approach provides accurate slope displacement hazard curves and failure probabilities.
Article
Engineering, Geological
Mohamad M. Hallal, Brady R. Cox
Summary: This article discusses the spatial area that influences seismic site response based on two-dimensional ground response analyses (GRAs) conducted at the Treasure Island Downhole Array (TIDA) site. The findings suggest that the influence of seismic site effects extends to distances of up to 1 km from the site, highlighting the importance of developing site-specific subsurface models over larger areas to accurately model and understand seismic site response.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2023)
Article
Computer Science, Interdisciplinary Applications
Shun Yi, Jian Chen, Jia-jun Pan, Jue-hao Huang, Yue-feng Qiu
Summary: This study aims to investigate the influence of interlayer variability and spatial variabilities of intralayer soil parameters on the mechanical responses of a layered slope. An integrated random field is developed using FLAC program to characterize the uncertainty of intralayer and interlayer spatial variabilities. Monte-Carlo simulation is conducted to evaluate the influences of these variabilities on slope stability and risk. The results show that the failure mode of a two-layered slope changes significantly due to the stochastic layered boundary, and ignoring the uncertainty arising from layered boundary and transition zone may underestimate the probability and risk of slope failure. The proposed equations can be valuable for investigating the probability and risk associated with layered slopes.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Engineering, Geological
Mao-Xin Wang, Qiang Wu, Dian-Qing Li, Wenqi Du
Summary: This paper presents a numerical-based seismic displacement analysis for slopes considering the spatial variability of soils. It develops two generic slope models based on a finite-difference approach, and models soil parameters as random fields. Dynamic analyses estimate slope displacements for both deterministic and random slope cases. The results show that neglecting soil spatial variability significantly underestimates slope displacement hazard, and two proposed strategies differ in treatment of aleatory variability.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
Anne-Sophie Mreyen, Davide Donati, Davide Elmo, Frederic Victor Donze, Hans -Balder Havenith
Summary: Ancient landslides of unknown origin are common in mountainous regions and provide insights into the long-term evolution or short-term extreme events driven by climate and seismotectonic activity. The Balta rockslide in the Romanian Carpathian Mountains is a case study that highlights the seismic activity and morphological features, raising questions about its failure history and the possibility of co-seismic triggering. The study utilizes 3D volume-based reconstruction and field measurements to estimate pre-failure conditions, and simulations with distinct element code reveal the joint-controlled failure and post-failure morphology with lateral expansion.
ENGINEERING GEOLOGY
(2022)
Article
Engineering, Environmental
Zhi-Ping Deng, Min Pan, Jing-Tai Niu, Shui-Hua Jiang
Summary: This paper proposes a full probabilistic design method for soil slopes by modeling two types of uncertainties using generalized coupled Markov chain and random field simulation. The study found that considering spatial variability of soil parameters and borehole layout scheme have significant influences on soil slope reliability-based design results.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
Andrew Fichera, Rachel King, Jarrod Kath, David Cobon, Kathryn Reardon-Smith
Summary: This paper tests the effectiveness and efficiency of Bayesian hierarchical spatial models (BHSM) in spatial modelling and analyzing agricultural data. The study compares the performance of BHSM with INLA-SPDE approach and the commonly used glm approach. The results show that the INLA-SPDE approach has excellent predictive performance and stable parameter estimates, providing a significant advantage in reducing false-positive errors.
SCIENTIFIC REPORTS
(2023)
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
Polynikis Vazouras, Panos Dakoulas, Spyros A. Karamanos
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2015)
Article
Engineering, Geological
Polynikis Vazouras, Spyros A. Karamanos, Panos Dakoulas
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2012)
Article
Engineering, Geological
Panos Dakoulas
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2012)
Article
Engineering, Geological
Panos Dakoulas
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2012)
Article
Engineering, Geological
P. Dakoulas, P. Vazouras, P. Kallioglou, G. Gazetas
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2018)
Article
Engineering, Civil
P. Vazouras, A. Tsatsis, P. Dakoulas
Summary: This study investigates the uplift behavior and upheaval buckling of buried pipelines through scaled physical model tests. The research shows that the internal pressure of the pipeline and the soil strength both affect the resistance to upheaval buckling.
JOURNAL OF PIPELINE SYSTEMS ENGINEERING AND PRACTICE
(2021)
Article
Energy & Fuels
Dimitrios Tselios, Grigorios Papageorgiou, Nikolaos Alamanis, Pandelis Ipsilandis
Summary: In this study, an integrated method is formulated to address the problems of project selection and scheduling in a portfolio, especially for energy projects. The method extends the concept of Incremental Funding Method (IFM) and utilizes a Dynamic Programming solution. It shows great potential in simultaneously selecting and scheduling project proposals.
ENERGY SYSTEMS-OPTIMIZATION MODELING SIMULATION AND ECONOMIC ASPECTS
(2022)
Article
Green & Sustainable Science & Technology
Theodoros Chrysanidis, Dimitra Mousama, Eleni Tzatzo, Nikolaos Alamanis, Dimos Zachos
Summary: This research modeled, analyzed and dimensioned buildings in different earthquake hazard zones in Greece, and estimated the construction cost of their structural bodies. The research demonstrates that the area of earthquake hazard zone significantly influences the construction cost of load-bearing structures of reinforced concrete buildings, and provides helpful conclusions related to this influence.
Article
Water Resources
Nikolaos Xafoulis, Yiannis Kontos, Evangelia Farsirotou, Spyridon Kotsopoulos, Konstantinos Perifanos, Nikolaos Alamanis, Dimitrios Dedousis, Konstantinos Katsifarakis
Summary: Floods pose significant threats and cause extensive damage. The Mediterranean region, particularly Greece, has recently witnessed numerous flood events, attributed to the increased frequency and intensity of floods due to climate change. Accurate flood mapping, which relies on precise geospatial data, plays a crucial role in flood risk assessment, mitigation planning, infrastructure protection, and sustainable development. This research focuses on evaluating flood modeling sensitivity by comparing different geospatial data resolutions, utilizing hydraulic simulations, and employing various analytical techniques to derive meaningful insights.
Article
Energy & Fuels
Nikolaos Alamanis
Summary: This paper investigates the effects of the two-dimensional mutability of soil properties on the seismic performance of oil and natural gas conduits passing through natural slopes. Random fields created by the Local Average Subdivision method are used to analyze the development of permanent displacements. The study highlights the significant impact that the two-dimensional mutability of soil properties has on the ground movement induced on the embedded pipeline, stressing the importance of accounting for it in the evaluation of seismic safety.
ENERGY SYSTEMS-OPTIMIZATION MODELING SIMULATION AND ECONOMIC ASPECTS
(2021)
Article
Energy & Fuels
Nikolaos Alamanis, Panos Dakoulas
Summary: The seismic performance of oil and natural gas pipelines in earth slopes is characterized by uncertainty related to earthquake shaking and natural heterogeneity. The spatial variability of soil properties significantly affects the permanent displacements of natural slopes, leading to a variation range of about +/- 60%.
ENERGY SYSTEMS-OPTIMIZATION MODELING SIMULATION AND ECONOMIC ASPECTS
(2021)
Article
Engineering, Civil
Gregory C. Sarvanis, Spyros A. Karamanos, Polynikis Vazouras, Elisabetta Mecozzi, Antonio Lucci, Panos Dakoulas
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2018)
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)
