Searched for: author:"Hicks, M.A."
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Hicks, M.A. (author), Varkey, D. (author), van den Eijnden, A.P. (author), de Gast, T. (author), Vardon, P.J. (author)
A case study involving the assessment and re-design of an existing dyke, founded on a layered soil, has compared deterministic analysis based on 5-percentile property values and a reliability-based random finite element analysis consistent with the requirements of Eurocode 7. The results show that a consideration of the spatial nature of soil...
journal article 2019
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Duvvuru Mohan, V.K. (author), Vardon, P.J. (author), Dusic, Milorad (author), van Gelder, P.H.A.J.M. (author), Hicks, M.A. (author), Burgazzi, Luciano (author)
Nuclear power plants are exposed to a variety of hazards, which may result in risks (the product of the likelihood of the hazard and resulting consequence). One of the key objectives of the NARSIS project is to improve the integration of external hazards and their consequences with existing state-of-the-art risk assessment methodologies in the...
report 2019
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Gonzalez Acosta, J.L. (author), Zheng, X. (author), Vardon, P.J. (author), Hicks, M.A. (author), Pisano, F. (author)
Stress oscillations in the material point method (MPM) are one of the major reasons unrealistic results are obtained. In this paper an investigation of the stress oscillations occurring when using one- and two-phase approaches is performed. Specifically, an axisymmetric benchmark and a two-dimensional plane strain problem are used to demonstrate...
conference paper 2019
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Varkey, D. (author), Hicks, M.A. (author), Vardon, P.J. (author)
An improved semi-analytical method for calculating the reliability of 3D slopes with spatially varying shear strength parameters is proposed. The response of an existing semi-analytical method has been compared with that of the computationally more intensive, but more general, random finite element method (RFEM), demonstrating that the simpler...
journal article 2019
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Remmerswaal, G. (author), Bolognin, M. (author), Vardon, P.J. (author), Hicks, M.A. (author), Rohe, A. (author)
This paper describes current work on the implementation of non-trivial boundary conditions (BCs) for improving the general applicability of the Material Point Method (MPM) to geotechnical boundary values problems. It summarises novel boundary treatments (non-trivial BCs) in MPM for (i) flow conditions, as well as (ii) the application of a...
conference paper 2019
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de Gast, T. (author), Vardon, P.J. (author), Hicks, M.A. (author)
The variability of soil is well known to affect the geotechnical performance of structures. As probabilistic design methods become more commonly used, the ability to measure the variability of soil becomes more important. However, by using only the point statistics of soil parameters in design (e.g. the mean and standard deviation), typically an...
conference paper 2018
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Gonzalez Acosta, J.L. (author), Vardon, P.J. (author), Hicks, M.A. (author), Pantev, I.A. (author)
In geotechnical engineering, proper design of retaining structures is of great importance, since failure of these structures can lead to catastrophic consequences. Nowadays, the finite element method is seen as a reliable numerical technique to analyze soil behaviour and is widely used to assess the interaction be-tween soil and rigid structures...
conference paper 2018
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Wang, B. (author), Vardon, P.J. (author), Hicks, M.A. (author)
Rainfall-induced slope failures are a major category of slope failure, with incidents likely to increase with the predicted escalation of extreme rainfall events. Traditional numerical methods such as the finite element method are often restricted in their applicability to small deformation analyses. Therefore, incomplete descriptions of the...
journal article 2018
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Liu, K. (author), Vardon, P.J. (author), Hicks, M.A. (author)
A data assimilation framework, utilising measurements of pore water pressure to sequentially improve the estimation of soil hydraulic parameters and, in turn, the prediction of slope stability, is proposed. Its effectiveness is demonstrated for an idealised numerical example involving the spatial variability of saturated hydraulic...
journal article 2018
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van den Eijnden, A.P. (author), Hicks, M.A. (author)
Improbable slope failure is addressed in the framework of reliability analysis of slopes in heterogeneous cohesive soils, as the small subset of realisations that fail without additional measures to trigger failure. The mode of these slope failures, located at the weak tail of the reliability curve, is demonstrated to differ significantly...
journal article 2018
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Remmerswaal, G. (author), Hicks, M.A. (author), Vardon, P.J. (author)
This paper investigates embankment reliability based on the ultimate limit state (ULS). The ULS is generally not clearly defined and, especially for flood defences, the ULS is currently under discussion. According to Dutch law [1], flooding which leads to either casualties or substantial financial damage is considered as the ultimate limit state...
abstract 2018
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de Gast, T. (author), Hicks, M.A. (author), Vardon, P.J. (author), van Eijnden, A.P. (author)
The Random Finite Element Method (RFEM) has been shown in many theoretical publications to offer advantages in the quantification of the probability of failure. However, it has rarely been applied in real situations (geometry, material properties, soil layers) and seldom, if at all, to a well instrumented geotechnical failure. This paper reports...
conference paper 2018
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Varkey, D. (author), Hicks, M.A. (author), Vardon, P.J. (author)
The paper investigates the stability of slopes with spatially variable and cross-correlated shear strength parameters in 3D. The influence of various cross-correlation coefficients between these parameters on the probability of 3D slope failure has been considered for different levels of anisotropy of the heterogeneity in the shear strength....
conference paper 2018
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Li, Y. (author), Vardon, P.J. (author), Hicks, M.A. (author), Hart, J (author), Fokker, PA (author)
OPERA-PU-TUD321d<br/>Radioactive substances and ionizing radiation are used in medicine, industry, agriculture, re- search, education and electricity production. This generates radioactive waste. In the Netherlands, this waste is collected, treated and stored by COVRA (Centrale Organisatie Voor Radioactief Afval). After interim storage for a...
report 2018
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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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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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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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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
document
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
Searched for: author:"Hicks, M.A."
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