Searched for: subject%3A%22stability%22
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Frasson, Bruna J. (author), Rocha, Janaíde C. (author)
Release of silicon and alumina from aluminosilicate occurs at early stages of alkaline reaction. Alkalinity and different aluminosilicate could influence dissolution of particles and modify microstructure of alkali-activated systems. However, there is a lack of study regarding the effects of Portland cement (OPC) addition on alkali-activated...
conference paper 2021
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Chen, Chen (author), Zheng, Qi (author), Jiang, Jinyang (author)
In this paper, composite material C-S-H/PEG1000 was prepared by multi-scale porous material C-S-H as support and phase change material (PCM) PEG1000 by melt blending, so that it can reduce hydration heat of cementitious system utilizing the characteristics of releasing and storing energy of PCM. TEM, IR, DSC-Tg, BET, MIP and various other...
conference paper 2021
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Correia dos Santos, R. (author), Caldeira, L. (author), Maranha das Neves, E, (author)
A laboratory study aiming at the evaluation of the suffusion behaviour of coarse gap-graded soils is presented. Six granular gap-graded soils missing the medium-to-coarse sand fraction have been examined. Four soils have no fines, one has 5% of non-plastic fines, and one has 5% of clayey fines (with plasticity index of about 14%). The use of...
conference paper 2017
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Slangen, P.H.H. (author), Fannin, R.J. (author)
conference paper 2017
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De Gast, T. (author), Vardon, P.J. (author), Jommi, C. (author), Hicks, M.A. (author)
Regular dyke assessment is part of reducing the risk of flooding in the Netherlands. 18 000 km of dykes are assessed at regular intervals, of which 14 000 km are classified as regional dykes and their main aim is to defend polders from inundating. The methods of assessing regional dykes are strongly inter-twined with the methods of assessing...
conference paper 2015
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Reinders, K.J. (author), Schoenmaker, B. (author), Nohl, W.A. (author)
New vertical steel storage tanks founded on a shallow foundation of a crushed rock ring are planned at the same location of former storage tanks. The dimensions, loads and foundation of the new tanks are identical to the old tanks which were erected 40 years ago and demolished a few years ago. Despite the fact that the new tanks are identical to...
conference paper 2015
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Mergili, M. (author), Marchesini, I. (author), Rossi, M. (author), Alvioli, M. (author), Schneider-Muntau, B. (author), Cardinali, M. (author), Ardizzone, F. (author), Fiorucci, F. (author), Valigi, D. (author), Santangelo, M. (author), Bucci, F. (author), Guzzetti, F. (author)
The GIS-based open source software r.slope.stability computes broad-scale spatial overviews of shallow and deep-seated slope stability through physically-based modelling. We focus on the landslide-prone 90 km2 Collazzone area, central Italy, exploiting a comprehensive set of lithological, geotechnical and landslide inventory data available for...
conference paper 2015
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Zhang, L. (author), Li, X. (author), Li, D. (author), Zhou, C. (author)
Important engineered slopes are often heavily instrumented and their performance routinely monitored through these instruments. The evaluation of the safety of the slopes based on the monitored information is however a challenge. A systematic method is presented in this paper for evaluating the slope safety by combining multi-source monitoring...
conference paper 2015
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Honjo, Y. (author), Moro, H. (author), Ishihara, M. (author), Otake, Y. (author)
The ministry of land, infrastructures, transportation and tourism (MLIT) of the Japanese government maintains governmental managed river levee for the safety against flood whose total length is more than 10,000 km. The design standard of river levee had been traditionally done based on so called shape based specification, where levee is judged...
conference paper 2015
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Länsivaara, T. (author), Knuuti, M. (author)
All Eurocodes are currently under a critical review, while the work for a second generation of codes are about to start in 2015. For the geotechnical design EN 1997-1 is facing high demands for harmonization and simplification of the present code. The paper presents some proposals for improving the code regarding ultimate limit state (ULS)...
conference paper 2015
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Effati Daryani, M.B. (author), Bahadori, H. (author), Daryani, K.E. (author)
The paper contrasts results obtained by the partially factored limit state design method and a more advanced Random Finite Difference Method (RFDM) in a benchmark problem of slope stability analysis with random undrained shear strength parameter. Local Average Subdivision method was used to simulate a non-Gaussian random variable. The key...
conference paper 2015
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Zhang, L. (author), Yan, W.M. (author)
Soil slopes are generally unsaturated in which the soil-water characteristic curve (SWCC) plays an important role in its hydro-mechanical response. The commonly used Mohr-Coulomb failure criterion in saturated soil mechanics could be extended to take SWCC into account which is then able to determine the shear strength of unsaturated soil. Like...
conference paper 2015
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di Matteo, L. (author), Valigi, D. (author), Ricco, R. (author), Romeo, S. (author)
The present work quantified the laboratory geotechnical variability by repeatability direct shear test (DS) on alluvial fine-grained soils. The effect of laboratory variability of geotechnical parameters (cohesion c' and friction angle ϕ′) on slope stability was investigated. A mixture of compacted fine sand (40%) and clayey silt (60%) taken...
conference paper 2015
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Zugic, Z. (author)
Earthquake-induced sliding deformations are commonly used to assess the seismic performance of slopes. These deformations are the cumulative, downslope movement of a sliding mass occurred due to earthquake shaking, and represent the valuable indicator of risk and possible damage above slope. Current probabilistic procedures that use seismic...
conference paper 2015
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Griffiths, D.V. (author), Huang, J. (author), Fenton, G.A. (author)
Using recently obtained deterministic results as a benchmark, probabilistic slope stability analyses have been performed on an undrained slope using the random finite element method (RFEM). Non-stationary random fields have been generated with linearly increasing mean undrained strength and a constant coefficient of variation. The influence of...
conference paper 2015
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Wu, W. (author)
Most of the research findings in evaluating slope stability using limit analysis are chart-based. No such stability chart is available to cover a wide range of material strength, slope geometries and external disturbance. Practitioners find it difficult to use the charts for a specific slope project. Compared with a large number of existing...
conference paper 2015
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Bezuijen, A. (author), Van Beek, V.M. (author), Van den Ham, G.A. (author), Zwanenburg, C. (author)
Three on-going dike safety studies (on: macro stability, piping and flow slides) in the Netherlands make use of geotechnical physical models. A short outline of these projects is presented; the physical models chosen are described and discussed. The three studies use different physical models, depending on the research questions at the beginning...
conference paper 2012
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Zwanenburg, C. (author)
Stability assessment of existing dikes build on soft soil generates questions on the available stability calculation techniques and material models. Especially peat behaviour is not easily captured by standard design methods. This has led to disapproval, based on calculations, of dikes that have been in operation for several hundreds of years....
conference paper 2012
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Verstappen, R.W.C.P. (author), Veldman, A.E.P. (author)
We propose to discretize the convective and diffusive operators in the (incom- pressible) Navier-Stokes equations in such a manner that their symmetries are preserved. The resulting spatial discretization inherits all symmetry-related conservation and stability properties from the continuous formulation. In particularly, a symmetry-preserving...
conference paper 2006
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Sarkar, S. (author), Bijl, H. (author)
In this paper the aeroelastic stability of a wind turbine rotor in the dynamic stall regime is investigated. Increased flexibility of modern turbine blades makes them more susceptible to aeroelastic instabilities. Complex oscillation modes like flap/lead-lag are of particular concern, which give way to potential structural damage, see...
conference paper 2006
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