Article
Geosciences, Multidisciplinary
Tahsin Omur Budak, Ayhan Gurbuz, Bahadir Eksioglu
Summary: The pocket penetrometer (PP) test is a widely used method for assessing the strength of cohesive soils. This study aims to establish precise correlations between PP test results and other laboratory tests for undrained shear strength (Su) of remolded finer soils.
Article
Engineering, Marine
Jiayi Shen, Xinyi Wang, Qian Chen, Zhaoyi Ye, Qiaoling Gao, Jiawang Chen
Summary: The laboratory miniature vane shear test (MVST) is widely used to measure the undrained shear strength of marine sediments, but transferring soil samples from the seabed to the laboratory can reduce soil strength by releasing in situ confining stress. In this study, a Coupled Eulerian-Lagrangian (CEL) approach in ABAQUS is used to model the three-dimensional standard and miniature vane shear tests, and estimate the undrained shear strength of sensitive clay under different stress conditions. A linear strength model is proposed based on the numerical simulation results, which considers both the effects of confining stress and eliminates the size effects caused by vane blades of MVST. This model can be used to estimate the undrained shear strength of sensitive clay under shallow seabed surfaces.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Geological
Bo Zhang, Rick Chalaturnyk, Jeff Boisvert
Summary: This study proposes a numerical characterization workflow to predict the failure mode and shear strength of heterogeneous oil sands interbedded with shale during thermal recovery. The results show that shear failures of weaker shale play a significant role in the elastoplastic behavior and reduced shear strength of heterogeneous oil sands. The proposed numerical workflow allows for quantitative investigations of geomechanical response for rock mass with complex lithological heterogeneities.
CANADIAN GEOTECHNICAL JOURNAL
(2021)
Article
Engineering, Geological
Shun Wang, Wei Wu, Deshan Cui
Summary: The mechanical behavior of clastic soil was described by numerical simulations considering both the soil matrix and breccia. The simulations indicated that breccia content, gradation, and overconsolidation ratio significantly influenced the strength, deformation, and failure pattern of clastic soil.
Article
Chemistry, Multidisciplinary
Bin Fu, Yingchun Li, Chun'an Tang, Zhibin Lin
Summary: This study investigates the impact of naturally heterogeneous locked patches of different properties on rock slope stability. It is found that rock homogeneity affects the failure mode, and the length and strength of locked patches have a significant influence on shear strength and displacement. Additionally, the sequence of failure is affected by the relative positions of the locked patches.
APPLIED SCIENCES-BASEL
(2021)
Article
Multidisciplinary Sciences
Seung-Hun Lee, Muhammad Naqeeb Nawaz, Song-Hun Chong
Summary: In this study, a modified direct shear apparatus was used to conduct 45 different shear tests in various directions and under different vertical stresses. The results show that shearing against the scales (cranial shearing) mobilizes higher shear resistance and produces a dilative response compared to shearing along the scales (caudal shearing). Additionally, higher scale height or shorter scale length is associated with increased interface friction angle.
SCIENTIFIC REPORTS
(2023)
Article
Construction & Building Technology
Nima Hakimelahi, Meysam Bayat, Rassoul Ajalloeian, Bahram Nadi
Summary: In this study, the mechanical properties and deformation of woven geotextile-reinforced calcareous sand were evaluated through a series of tests. The results showed that the addition of woven geotextile significantly increased the strength of the specimens and changed the stress-strain curves from softening to hardening and dilatancy. Increasing the number of geotextile layers and applying confining pressure shifted the shear deformation towards strain-hardening behavior. Overall, woven geotextiles greatly improved the apparent cohesion strength of calcareous sand soil, with the relative density and confining pressure also affecting volumetric changes and dilatancy.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Chemistry, Physical
Zhi Cheng, Xinrong Cheng, Yuchao Xie, Zhe Ma, Yuhao Liu
Summary: This paper investigates the influence of desulfurization ash and fly ash on the strength of loess. The results show that both desulfurization ash and fly ash can improve the shear strength of loess, with desulfurization ash having a better effect. The simulation results are in good agreement with the experimental results, but the simulated shear strength is slightly higher than the test shear strength.
Article
Engineering, Geological
Sara Rios, Maxim Millen, Julieth Quintero, Antonio Viana da Fonseca
Summary: The damage caused by earthquakes can be a result of seismic excitation and/or excess pore pressure in the soil. Reduction in soil stiffness due to decreased effective stress affects the seismic response of the soil. Therefore, the level of damage depends on the amount of seismic energy before liquefaction. Developing simplified methods to assess excess pore pressure is crucial for estimating seismic demand and improving building safety.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2022)
Article
Mechanics
Ri-hong Cao, Rubing Yao, Tao Hu, Changsong Wang, Kaihui Li, Jingjing Meng
Summary: Experimental and numerical tests were conducted to investigate the fracture characteristics of transversely isotropic rock under planar shear fracture loading, focusing on the influence of bedding plane inclination, strength, and spacing on fracture loads and patterns. The results showed that inclination angles, strength, and spacing of the bedding planes significantly affect the fracture load and pattern, with higher bedding plane strength resulting in higher fracture loads and different fracture patterns.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Environmental Sciences
Jie Jiang, Jian Su, Xiaoduo Ou, Mengsen Weng, Xilin Lu
Summary: This study investigates the composition, physical properties, shear strength, and bearing capacity of bauxite residue through laboratory and in-situ tests. The results show that bauxite residue exhibits distinct stratification characteristics, with increased shear strength and varying bearing capacity with depth and location within the tailings pond.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Engineering, Environmental
Soheil Ghadr, Chieh-Sheng Chen, Chih-hsuan Liu, Ching Hung
Summary: This study explores the feasibility of using shredded face masks as an alternative reinforcing material in sands. The experimental results show that the inclusion of face masks can significantly improve the shear strength of sands, with the improvement being sensitive to the initial stress and increasing with the length of the face masks.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2022)
Article
Construction & Building Technology
Hooman Rezaeian, Krishanu Roy, Mohammad Yekrangnia, Boshan Chen, James B. P. Lim
Summary: The study introduces a shear test program for CFS Tab connections and their failure mechanism, which demonstrated that failure occurs mainly in plate yielding and tearing. Nonlinear finite element (FE) models showed good agreement with test results. The design equations provided in AS/NZS 4600 and AISI S100 could predict the ultimate shear capacity of CFS Tab connections effectively.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Multidisciplinary Sciences
Royson Dsouza, Paulo Antunes, Markus Kakkonen, Olli Tanhuanpaa, Pekka Laurikainen, Farzin Javanshour, Pasi Kallio, Mikko Kanerva
Summary: This study developed and analyzed a monolithic compliant structure with an integrated Fiber Bragg Grating (FBG) sensor. The stiffness of the compliant structure was estimated using mathematical and finite element (FE) models. Qualification experiments confirmed the functional performance: MB testing of synthetic (carbon and glass) and natural (flax) single filaments was successfully performed.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Civil
C. Molitierno, C. Del Vecchio, M. Di Ludovico, A. Prota
Summary: This study focuses on the seismic response of existing reinforced concrete buildings and the calibration of numerical models through pseudo-dynamic tests and numerical simulations. Nonlinear numerical models are validated using experimental results and used to predict damage to infills. The results are compared and discussed with damage observed during post-earthquake inspections.
JOURNAL OF EARTHQUAKE ENGINEERING
(2023)
Article
Engineering, Geological
M. Soledad Mashiri, Jayan S. Vinod, M. Neaz Sheikh, J. Antonio H. Carraro
ENVIRONMENTAL GEOTECHNICS
(2018)
Article
Engineering, Geological
Dennis Pere Alazigha, Jayan S. Vinod, Buddhima Indraratna, Ana Heitor
ENVIRONMENTAL GEOTECHNICS
(2019)
Article
Construction & Building Technology
Yujie Qi, Buddhima Indraratna, Jayan S. Vinod
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2018)
Editorial Material
Engineering, Geological
Yujie Qi, Buddhima Indraratna, Ana Heitor, Jayan S. Vinod
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2019)
Article
Materials Science, Textiles
K. P. Indulekha, P. K. Jayasree, K. Balan, L. Dhanesh, J. S. Vinod
Summary: Cocologs, made of coir fibers, have been proven to be effective erosion control products along river banks. The permeability of cocologs is a critical parameter in designing cocolog-stabilized geostructures, with experimental results showing that density is the most significant factor influencing permeability.
JOURNAL OF NATURAL FIBERS
(2021)
Article
Engineering, Geological
Rakesh Sai Malisetty, Buddhima Indraratna, Jayan S. Vinod
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2020)
Article
Computer Science, Interdisciplinary Applications
Rakesh Sai Malisetty, Buddhima Indraratna, Jayan Vinod
COMPUTERS AND GEOTECHNICS
(2020)
Article
Materials Science, Multidisciplinary
Jing Chen, Buddhima Indraratna, Jayan S. Vinod, Ngoc Trung Ngo, Rui Gao, Yangzepeng Liu
Summary: This study investigated the mechanical behavior of ballast contaminated by coal and subgrade clay through large-scale direct shear tests. The results showed that clay-fouled ballast exhibited higher shear strength and smaller dilation compared to coal-fouled ballast. DEM simulations indicated that coal-fouled ballast had smaller average contact forces, less stress concentrations, and greater coordination numbers than clay-fouled ballast for the same level of fouling.
Article
Engineering, Geological
Chathuri M. K. Arachchige, Buddhima Indraratna, Yujie Qi, Jayan S. Vinod, Cholachat Rujikiatkamjorn
Summary: This study focuses on the concept of using rubber granules from waste tyres as elastic aggregates blended with traditional ballast particles to improve the performance of rail tracks, forming a Rubber Intermixed Ballast System (RIBS). The research indicates that RIBS with over 10% rubber content consistently reduce dilation under changing confining pressures and effectively control ballast fouling within the granular matrix. The results also show that rubber particles ranging from 9.5 to 19 mm with similar angularity to ballast aggregates are advantageous in reducing the breakage of load-bearing larger aggregates.
Article
Engineering, Geological
Jing Chen, Jayan S. Vinod, Buddhima Indraratna, Ngoc Trung Ngo, Rui Gao, Yangzepeng Liu
Summary: This paper presents the results of Discrete Element Modelling (DEM) in quantitatively examining the impact of coal fouling on the deformation and degradation of ballast under cyclic loading. The DEM model considers the effects of Weibull distribution and a granular medium hardening law, and has been calibrated with laboratory data. The simulations show that increased fouling exacerbates sleeper settlement and decreases resilient modulus and particle breakage. Microscopic analysis reveals that the decrease in ballast breakage in fouled assemblies is mainly due to the decrease in inter-particle contact pressures caused by the coating of ballast aggregates by the coal fines.
Article
Engineering, Geological
Krishna Allulakshmi, Jayan S. Vinod, Ana Heitor, Andy Fourie, David Reid
Summary: This study presents DEM simulations of the instability behavior of granular materials under CSD condition, analyzing the effects of different initial states and extracting micromechanical parameters to characterize the instability behavior. The initial stress state of the soil was found to significantly influence the evolution of anisotropic coefficients, with an increase in geometric anisotropy and a decrease in mechanical anisotropy observed after instability.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2021)
Article
Engineering, Geological
Veena Jayakrishnan, K. S. Beena, Unni G. Kartha, J. S. Vinod
INTERNATIONAL JOURNAL OF GEOTECHNICAL EARTHQUAKE ENGINEERING
(2019)
Article
Engineering, Geological
Beena K. SarojiniAmma, Buddhima Indraratna, Jayan S. Vinod
GEOMECHANICS AND GEOENGINEERING-AN INTERNATIONAL JOURNAL
(2019)
Proceedings Paper
Engineering, Civil
Yujie Qi, Buddhima Indraratna, Jayan S. Vinod
PROCEEDINGS OF GEOSHANGHAI 2018 INTERNATIONAL CONFERENCE: ADVANCES IN SOIL DYNAMICS AND FOUNDATION ENGINEERING
(2018)
Article
Engineering, Geological
Syed Khaja Karimullah Hussaini, Buddhima Indraratna, J. S. Vinod
GEOTECHNICAL ENGINEERING
(2018)
