Norwegian Geotechnical Institute (NGI) Digital Archive
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Finite element analyses of slurry trench stability and deformations – back-calculation of field tests in soft cl
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Analysis of mooring performance and layout parameters of multi-segment mooring system for a 15 MW floating wind turbine
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Deliverable 5.6 Quantified CO2 Storage Containment Risk Assessment
No full textThe current state-of-the-art for assessing CO2 containment risk relies on qualitative or semi-quantitative methods using bowtie analysis or Layers Of Protection Analysis (LOPA). Whilst these are more than adequate for screening of sites, a fully quantitative method is desirable to support licensing and ongoing management of risk. This report demonstrates the characterisation of probabilistic failure of geological features and takes full account of dependent failure of geological barriers (which is a failing of current methods), as well as considering explicitly the uncertainty in supporting failure and consequences data. It builds on previous Carbon Capture and Storage (CCS) work and established techniques in the nuclear industry for the quantitative risk modelling of fission product release from containment and, separately, seismic hazards, by trialling the fully quantitative CO2 containment risk evaluation method (D5.3).European CommissionpublishedVersio
The Global Threat from the Irreversible Accumulation of Trifluoroacetic Acid (TFA)
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3D FE simulation of PISA monopile field tests at Dunkirk using SANISAND-MS
Full text linkThis paper presents an investigation into the suitability of the SANISAND-MS model for the three-dimensional finite-element (3D FE) simulation of cyclic monopile behaviour in sandy soils. In addition to previous work on the subject, the primary focus of this study is to further assess the model's capability to reproduce the accumulation of permanent deflection/tilt under cyclic lateral load histories. To this end, experimental data from the PISA field campaign are employed, particularly those emerged from the medium-scale cyclic tests conducted at the Dunkirk site in France. The methodology adopted herein involves calibrating the SANISAND-MS model's parameters to align with 3D FE simulation of a selected monotonic pile test reported by the PISA team using a bounding surface plasticity model partly similar to SANISAND-MS. Subsequently, the soil parameters governing SANISAND-MS’ ratcheting response are calibrated using only minimal information from published PISA field data. While representing the first attempt to simulate the reference data set using a fully ‘implicit’ 3D FE approach, this paper offers novel insights into calibrating and using advanced cyclic models for monopile analysis and design – particularly, with regard to the quantitative influence of pile installation effects and sand's microstructural evolution under drained cyclic loading.3D FE simulation of PISA monopile field tests at Dunkirk using SANISAND-MSacceptedVersio
WP 2 – Full-scale experiments at Ryggfonn Ryggfonn avalanche observations 2021/2022
Full text linkNGI is operating the avalanche test site at Ryggfonn in Stryn municipality, Vestland county, western Norway (61.969°N, 7.275°E) since the early 1980s.
In addition to the field work and data collection in the framework of WP2, necessary repairs and updating of the data acquisition system at the Ryggfonn avalanche test site were carried out under this task. This is to ensure that the site is ready for the winter season 2021/2022.Norges vassdrags- og energidirektorat (NVE
