Article
Computer Science, Interdisciplinary Applications
Charles W. W. Ng, Petrus A. Crous, Min Zhang, Muhammad Shakeel
Summary: The triggering and failure mechanisms of loose fill slopes, as well as the role of soil nails in preventing static liquefaction, were investigated using centrifuge model tests and numerical simulations. Rising groundwater can induce a rapid fluidised flowslide in the slope, which can be prevented by soil nailing.
COMPUTERS AND GEOTECHNICS
(2022)
Article
Engineering, Mechanical
Pitthaya Jamsawang, Panich Voottipruex, Pornkasem Jongpradist, Suched Likitlersuang
Summary: This paper investigates the failure cause of a composite soil-cement retaining wall during reservoir excavation in Bangkok, Thailand, and reports a rehabilitation method, highlighting how insufficient soil explorations led to unexpected soft clay thickness beyond the design range. The rehabilitation involved revising the wall configuration to strengthen the wall against the unexpected soft clay thickness.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Environmental
Zongyuan Ma, Hongjian Liao, Faning Dang, Yuxiang Cheng
Summary: A method for efficient seismic slope stability analysis and failure process simulation is proposed, focusing on the influence of soil dynamic mechanical behavior and ground motion characteristics on seismic slope stability. The study highlights the critical role of the frictional resistance characteristic of the slope rupture surface in the sliding distance of the slope under seismic conditions.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Engineering, Civil
S. Xu, A. M. Zsaki
Summary: This study developed a finite element-based model to investigate the effect of drawdown on railway embankments as a function of train speed. Results showed that steeper natural slopes with lower railway embankments are more prone to failure, while flatter slopes can achieve safe passage by limiting train speed.
TRANSPORTATION GEOTECHNICS
(2021)
Article
Mechanics
Richard J. Nash, Yaning Li
Summary: The shear resistance of bio-inspired suture joints with different waviness is explored using an integrated experimental and numerical approach. Polymeric single lap shear specimens with different waviness are designed and fabricated via multi-material additive manufacturing. Results show that the 3D printed suture joints fail under combined adhesive and cohesive failure mechanisms.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Multidisciplinary Sciences
Archita Goyal, Amit Kumar Shrivastava
Summary: This research investigates the behavior of conventional and helical soil nails in C-0 soil and finds that helical soil nails exhibit better stability compared to conventional soil nails.
Article
Biochemistry & Molecular Biology
Sotirios G. Siampanis, Georgios I. Giannopoulos, Nikos D. Lagaros, Antonios Hatziefremidis, Stelios K. Georgantzinos
Summary: In this study, a nonlinear, spring-based finite element approach is used to predict the nonlinear mechanical response of graphyne structures under shear loading. Different types of graphyne structures are numerically investigated, and their shear mechanical properties are calculated and compared with other estimations.
Article
Engineering, Geological
Thanh Son Nguyen, Suched Likitlersuang, Weeradetch Tanapalungkorn, Trung Nghia Phan, Suraparb Keawsawasvong
Summary: This study expands on the concept of random field copulas by implementing finite element limit analysis (FELA) with adaptive meshing. It examines the effects of copula selection on slope stability and reliability analyses in a geotechnical problem. The results demonstrate that different copula approaches lead to significantly different slope failure probabilities, and that using multiple dependency structures can reduce failure probabilities.
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
(2022)
Article
Engineering, Mechanical
Vishal Singh, Rakesh Kumar, Yann Charles, Dhiraj K. Mahajan
Summary: Modeling the coupled diffusion-mechanics response is essential for understanding the multifaceted hydrogen-assisted damage evolution in metallic materials. This study utilizes a dislocation density-based crystal plasticity model coupled with a hydrogen diffusion/trapping model to simulate the deformation and failure under the HELP mechanism of hydrogen embrittlement. The findings highlight the significant role of hydrogen in influencing dislocation interactions and density, leading to macroscopic softening or hardening.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Automation & Control Systems
Yue Meng, Lifeng Ma, Weitao Jia, Hongbo Xie, Liwei Lu
Summary: This paper proposes a numerical simulation method to study the influence of process parameters on stress distribution in ultrasonic shearing of hard-to-deform magnesium alloy sheets. The results showed that the sheet temperature had the greatest influence on the stress distribution in the AZ31B magnesium alloy sheet. Ultrasonic shearing significantly reduced the equivalent stress on the sheet and improved the sheet section quality.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Geological
Ze Li, Yu Chen, Yakun Guo, Xiaoyan Zhang, Shigui Du
Summary: The study introduces a novel method, the element failure probability method (EFP), which considers the randomness of shear parameters and groundwater levels in order to analyze the reliability of soil slopes. By calculating the probability of slope failure using safety factors and velocity fields, the distribution of failure regions in space can be determined. This method could have theoretical value for further research in applying plastic limit analysis to analyze slope reliability.
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Hassan Sabetamal, John P. Carter, Xue Zhang, Daichao Sheng
Summary: This study develops a numerical procedure for analyzing coupled geotechnical problems and highlights the effects of soil softening. Advanced soil constitutive models are used to capture the progressive de-structuring of soil structure. The changing soil resistance due to soil softening, remoulding, and reconsolidation is illustrated through numerical simulations.
COMPUTERS AND GEOTECHNICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Liang Wang, Qinghua Lei
Summary: In this paper, a novel numerical model incorporating a damage mechanics formulation into the particle finite element method is developed to analyze the pre- and post-failure behavior of faulted rock slopes. The model is able to accurately simulate the damage evolution of rocks and the mechanical properties of fault zones, and capture the initiation, evolution, and consequence of catastrophic rock slope failure across multiple temporal scales.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Construction & Building Technology
Shaochun Ma, Yuanyuan Lou, Peng Bao
Summary: Shear connectors play a vital role in steel-concrete composite beams, but failures due to unreliable connections still occur. This study proposes a novel bolted nail and its combined connector, which eliminates the influence of certain factors on the mechanical performance of shear connectors. Experimental research was conducted to obtain the shear resistance, failure mechanism, and stress-strain properties of the connectors. Comparative analysis showed that the stud connectors performed better in terms of deformation and shearing resistance compared to bolted connectors. The research findings have practical implications for actual projects and provide reference for similar connectors' research.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Materials Science, Ceramics
Karthikeyan Ramachandran, Subhashree Leelavinodhan, Christian Antao, Antony Copti, Cantalapiedra Mauricio, Yelisetti Lakshmi Jyothi, Doni Daniel Jayaseelan
Summary: The failure mechanisms of Oxide-Oxide ceramic matrix composites AS-N610 were investigated in this study. The unnotched samples showed perfect elastic behavior at room temperature, while the notched samples exhibited pseudo-ductile behavior. The tensile strength of the composites decreased at high temperatures. Thermal shock experiments revealed a reduction in retained strength of the samples. Fracture origin was observed on the mid-plane of all samples, indicating higher fiber pull-out, delamination, and pseudo-ductile behavior. Finite element analysis confirmed stress concentration on the failure areas.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Geography
Veronica Zumpano, Francesca Ardizzone, Francesco Bucci, Mauro Cardinali, Federica Fiorucci, Mario Parise, Luca Pisano, Paola Reichenbach, Francesca Santaloia, Michele Santangelo, Janusz Wasowski, Piernicola Lollino
Summary: The paper describes a multitemporal landslide inventory map prepared for urban areas in the Southern Apennines of Italy, revealing the high propensity of landslides and built-up areas on existing landslides in the region.
Editorial Material
Engineering, Geological
Paul J. Vardanega, Gaetano Elia, Kai Yao
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2021)
Article
Engineering, Geological
D. Simpson, M. Rouainia, G. Elia
Summary: The construction industry in Abu Dhabi is thriving, with ambitious structures, but the geological understanding of the region is relatively poor, leading to overly conservative foundation designs. A calcareous mudstone studied in this paper exhibits characteristics between soil and rock, requiring a testing approach that combines methods from both disciplines.
ROCK MECHANICS AND ROCK ENGINEERING
(2021)
Article
Engineering, Geological
Annamaria di Lernia, Federica Cotecchia, Gaetano Elia, Vito Tagarelli, Francesca Santaloia, Giuseppe Palladino
Summary: This paper presents the results of a pilot study conducted in Foggia, Italy, which investigates the effects of rainfall water infiltration and the presence of a water-bearing aquifer on the stability of clayey slopes. The study used numerical simulations and limit equilibrium analyses to examine the impact of climatic and hydraulic factors on seepage processes and slope stability.
ENGINEERING GEOLOGY
(2022)
Article
Engineering, Geological
D. de Lucia, N. L. Fazio, P. Lollino
Summary: This study proposes advancements in evaluating the effects of dynamic loads on the stability of calcarenite underground cavities. The research finds that dynamic loads can cause instability effects in the caves, depending on the cavity width, roof thickness, and energy content of the dynamic input.
ROCK MECHANICS AND ROCK ENGINEERING
(2022)
Review
Engineering, Geological
Gaetano Elia, Mohamed Rouainia
Summary: This paper introduces the application of nonlinear time domain numerical approaches in geotechnical earthquake engineering, focusing on the dynamic finite element method. The key factors governing its predictive capabilities are discussed, providing protocols for evaluating the performance of critical geotechnical infrastructures and promoting familiarity of advanced nonlinear soil dynamic analysis among geotechnical practitioners.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Francesco Filice, Alessandra Pezzo, Piernicola Lollino, Michele Perrotti, Fabio Ietto
Summary: This study conducted geomechanical investigations on a carbonate rock scarp in San Donato di Ninea village, Italy, using a multi-approach including in-field investigations, geophysical surveys, and high-resolution drone images. The findings revealed unstable slope conditions and a high jointing rock mass. The 3D dense point cloud model and digital investigations provided valuable insights into the geological features and fracturing degree of the escarpment.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Yusuf Guzel, Gaetano Elia, Mohamed Rouainia, Gaetano Falcone
Summary: The selection of input motions at the seismic bedrock is crucial for estimating ground shaking. However, the effect of input motion scaling strategy on structural response is commonly studied without considering the presence of the soil deposit. In this study, different soft soil deposits were modeled using a nonlinear constitutive model, and more than 300 ground response analyses were conducted. The results showed that using an advanced elasto-plastic soil constitutive model accounted for nonlinear ground response effects, different scaling strategies led to comparable mean values of amplification factors, and variability of amplification factors was significantly reduced when the scaling strategy was compatible with the target spectrum over a specified period range.
Article
Geosciences, Multidisciplinary
Piernicola Lollino, Angelo Ugenti, Daniela de Lucia, Mario Parise, Carmen Vennari, Paolo Allasia, Nunzio Luciano Fazio
Summary: This study investigates the failure mechanism and reactivation factors of a large ancient landslide in Southern Italy in 2013. Through geological and geomorphological analyses, as well as limit equilibrium and finite element analyses, it is found that rainfall infiltration played a crucial role in increasing pore water pressure along the sliding surface and causing failure.
Article
Geosciences, Multidisciplinary
Gaetano Falcone, Gaetano Elia, Annamaria di Lernia
Summary: This paper describes the preliminary results of numerical analysis on the impact of seismic wave amplification on slope susceptibility. The results show that the thickness of the shear band greatly influences the amplification factors at the ground surface. The highest amplification factors occur at longer periods for gentle slopes with thick shear bands, while for steep slopes, the highest level of amplification is achieved at intermediate periods. In addition, the vertical component of acceleration can be considerably amplified, especially for steep topography.
Article
Computer Science, Interdisciplinary Applications
Lowell Tan Cabangon, Gaetano Elia, Mohamed Rouainia, Suraparb Keawsawasvong
Summary: Current research heavily relies on 2D modelling to predict tunnel seismic behavior, which may lead to inaccurate predictions due to the three-dimensional effects and soil-structure interaction. Natural soils often exhibit stiffness degradation during strong earthquakes, which cannot be captured by simple constitutive models. This paper presents advanced 3D numerical simulations that consider soil structure degradation, highlighting the significance of accurately predicting tunnel lining forces under multi-directional seismic loading.
COMPUTERS AND GEOTECHNICS
(2023)
Article
Geosciences, Multidisciplinary
Diego Guenzi, Danilo Godone, Paolo Allasia, Nunzio Luciano Fazio, Michele Perrotti, Piernicola Lollino
Summary: This study presents a case study on monitoring a soft-rock coastal cliff in southeastern Italy using webcams and a strain sensor. By using low-cost and open-source hardware and software, the study aims to analyze meteorological information, crack meter readings, and webcam footage to identify potential precursor signals of instability phenomena.
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
(2022)
Article
Engineering, Geological
G. Elia, M. Rouainia, A. di Lernia, A. F. D'Oria
Summary: This study examines the dynamic behavior of soils through a posteriori analysis, estimating the variations in soil shear modulus and material damping characteristics under different seismic intensities using shear stress-strain histories. The results indicate that kinematic hardening models are effective in capturing wave propagation during intense seismic loading, despite the typically low frequency of occurrence of the largest closed cycles.
GEOTECHNIQUE LETTERS
(2021)
Article
Construction & Building Technology
Valeria Leggieri, Annamaria di Lernia, Gaetano Elia, Domenico Raffaele, Giuseppina Uva
Summary: The paper uses a numerical approach to investigate the effects of vibrations on reinforced concrete buildings in dolomitic rocks induced by excavation works in an urban area in southern Italy. It suggests that a mitigation strategy can significantly reduce the vibrations induced by excavation processes on existing buildings.
Article
Geosciences, Multidisciplinary
Veronica Zumpano, Luca Pisano, Francesco Filice, Angelo Ugenti, Daniela de Lucia, Janusz Wasowski, Francesca Santaloia, Piernicola Lollino
Summary: This study focuses on susceptibility zonation for soil liquefaction in the Foggia Province, Italy, using the Analytical Hierarchy Process and geological data. Results indicate widespread areas of medium to high and very high susceptibility, with the most vulnerable zones identified along the Adriatic Sea coastline and watercourses.