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Maghsoudloo, A. (author), Galavi, Vahid (author), Hicks, M.A. (author), Askarinejad, A. (author)Static liquefaction is one of the principal triggering mechanisms of failure in fully saturated loose sand slopes both in offshore and onshore regions. Static liquefaction induced landslides are known for their significant softening and a fluid-like behavior at the onset of failure. However, the literature lacks experimentally verified advanced...conference paper 2017
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van den Eijnden, A.P. (author), Hicks, M.A. (author)For analyzing low probability slope failures, a modified version of subset simulation, based on performance-based subset selection rather than the usual probability-based subset selection, is combined with the random finite element method. The application to an idealized slope is used to study the efficiency and consistency of the proposed...journal article 2017
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Vardon, P.J. (author), Wang, B. (author), Hicks, M.A. (author)The simulation of slope failures, including both failure initiation and development, has been modelled using the material point method (MPM). Numerical case studies involving various slope angles, heterogeneity and rainfall infiltration are presented. It is demonstrated that, by utilising a constitutive model which encompasses, in a...journal article 2017
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de Gast, T. (author), Vardon, P.J. (author), Hicks, M.A. (author)The material point method is a finite element variant which allows the material, represented by a point-wise discretization, to move through the background mesh. This means that large deformations, such as those observed post slope failure, can be computed. By coupling this material level discretization to the spatial variability of the material...conference paper 2017
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Singh, Umesh (author), Crosato, A. (author), Giri, Sanjay (author), Hicks, Murray (author)The effects of sediment heterogeneity and sediment mobility on the morphology of braided rivers are still poorly studied, especially when the partial sediment mobility occurs. Nevertheless, increasing the bed sediment heterogeneity by coarse sediment supply is becoming a common practice in river restoration projects and habitat improvement...journal article 2017
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Varkey, D. (author), Hicks, M.A. (author), Vardon, P.J. (author)A 3D slope stability problem with spatially varying shear strength parameters has been analysed using the 3D random finite element method. This method links random fields of the random variables, in this case, cohesion and friction angle, with the finite element method within a Monte Carlo framework. The influence of spatial variability on...conference paper 2017
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van den Eijnden, A.P. (author), Hicks, M.A. (author), Vardon, P.J. (author)Spatial variation of soil strength parameters is a dominating uncertainty in slope stability analysis. This uncertainty can be accounted for in a stochastic description, based on a global geostatistical characterization of the soil strength parameters, which leads to a wide range of possible slope responses, of which only a small proportion...conference paper 2017
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Li, Y. (author), Hicks, M.A. (author), Vardon, P.J. (author)The three dimensional nature of soil spatial variability implies the need for 3D analysis of geotechnical structures. This paper presents the probabilistic analysis of long slopes such as levees and highway embankments, which are usually analysed unrealistically in plane strain, thereby ignoring the discrete failure mechanisms often encountered...conference paper 2017
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Wang, B. (author), Vardon, P.J. (author), Hicks, M.A. (author)The material point method is a finite element variant which allows the material, represented by a point-wise discretization, to move through the background mesh. This means that large deformations, such as those observed post slope failure, can be computed. By coupling this material level discretization to the spatial variability of the material...conference paper 2017
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Vardon, P.J. (author), Wang, B. (author), Hicks, M.A. (author)The material point method (MPM) has the potential to simulate the onset, the full evolution and the final condition of a slope failure. It is a variant of the finite element method (FEM), where the material is able to move through the mesh, thereby solving one of the major problems in FEM of mesh tangling. The post-peak material behaviour is...conference paper 2017
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Yuan, Jun (author), Vardon, P.J. (author), Hicks, M.A. (author), Hart, J (author), Fokker, PA (author)OPERA-PU-TUD321b<br/>Radioactive substances and ionizing radiation are used in medicine, industry, agriculture, re- search, education and electricity production. This generates radioactive waste. In the Neth- erlands, this waste is collected, treated and stored by COVRA (Centrale Organisatie Voor Radioactief Afval). After interim storage for a...report 2017
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Vardon, P.J. (author), Buragohain, Poly (author), Hicks, M.A. (author), Hart, J (author), Fokker, PA (author), Graham, C (author)OPERA-PU-TUD321c<br/>Radioactive substances and ionizing radiation are used in medicine, industry, agriculture, re- search, education and electricity production. This generates radioactive waste. In the Neth- erlands, this waste is collected, treated and stored by COVRA (Centrale Organisatie Voor Radioactief Afval). After interim storage for a...report 2017
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Yuan, Jun (author), Vardon, P.J. (author), Hicks, M.A. (author), Hart, J (author), Fokker, PA (author)Radioactive substances and ionizing radiation are used in medicine, industry, agriculture, re- search, education and electricity production. This generates radioactive waste. In the Neth- erlands, this waste is collected, treated and stored by COVRA (Centrale Organisatie Voor Radioactief Afval). After interim storage for a period of at least 100...report 2017
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Gonzalez Acosta, J.L. (author), Vardon, P.J. (author), Hicks, M.A. (author)Stress oscillations and inaccuracies are commonly reported in the material point method (MPM). This paper investigates the causes and presents a method to reduce them. The oscillations are shown to result from, at least in part, two distinctly different causes, both originating from the shape function approximations used. The first is due to the...journal article 2017
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Vardon, P.J. (author), Wang, B. (author), Hicks, M.A. (author)The simulation of slope failures, including both failure initiation and development, has been modelled using the material point method. By utilising a constitutive model which encompasses, in a simplified manner, both pre- and post-failure behaviour, the majority of types of geotechnical slope failure can be observed in the simulations. This is...journal article 2017
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Gonzalez Acosta, J.L. (author), Vardon, P.J. (author), Hicks, M.A. (author)Stress oscillations are a common phenomenon in the material point method (MPM), since this numerical method typically uses regular finite element (FE) shape functions to map variables from surrounding nodes to material points and vice versa, independently of the locations of the material points within an element. In integration this leads to a...conference paper 2017
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Liu, K. (author), Vardon, P.J. (author), Hicks, M.A. (author), Arnold, P. (author)The stability of most earth embankments is strongly influenced by the water content of the soil. The water content directly influences the suction or pore pressure in the soil, as well as the mass of material, thereby affecting the stress state and strength, and leading to changes in the stability. These aspects are coupled by the so-called soil...journal article 2017
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Ong, Carmichael F. (author), Geijtenbeek, T. (author), Hicks, Jennifer L. (author), Delp, Scott L. (author)Predictive simulations of human walking have great potential to expand our understanding of locomotion. For instance, they can isolate the effect of specific impairments on observed gait pathologies or aid in designing assistive devices by modeling human-device interactions. Introducing simulated impairments or adding augmentation devices to a...abstract 2017
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Li, Y. (author), Hicks, M.A. (author), Vardon, P.J. (author)A method of combining 3D Kriging for geotechnical sampling schemes with an existing random field generator is presented and validated. Conditional random fields of soil heterogeneity are then linked with finite elements, within a Monte Carlo framework, to investigate optimum sampling locations and the cost-effective design of a slope. The...journal article 2016
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Vardon, P.J. (author), Liu, K. (author), Hicks, M.A. (author)The determination of slope stability for existing slopes is challenging, partly due to the spatial variability of soils. Reliability-based design can incorporate uncertainties and yield probabilities of slope failure. Field measurements can be utilised to constrain probabilistic analyses, thereby reducing uncertainties and generally reducing...journal article 2016