Blar i Norwegian Geotechnical Institute (NGI) Digital Archive på tittel
Viser treff 6-25 av 431
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A Benchmark Case Study for Seismic Event Relative Location
(Peer reviewed; Journal article, 2020)“Precision seismology” encompasses a set of methods which use differential measurements of time-delays to estimate the relative locations of earthquakes and explosions. Delay-times estimated from signal correlations often ... -
A Boussinesq type extension of the GeoClaw model - a study of wave breaking phenomena applying dispersive long wave models
(Peer reviewed; Journal article, 2017)The nonlinear shallow water model is widely used in the study of tsunami propagation, but an increasing number of studies are dedicated to the dispersion dynamics of tsunamis. If the wave dispersion becomes important, ... -
A climatic trigger for the giant Troll pockmark field in the northern North Sea
(Journal article; Peer reviewed, 2017)Pockmarks are seafloor craters usually formed during methane release on continental margins. However, the mechanisms behind their formation and dynamics remain elusive. Here we report detailed investigations on one of the ... -
A Constitutive Model for Soft Clays Incorporating Elastic and Plastic Cross-Anisotropy
(Peer reviewed; Journal article, 2017)Natural clays exhibit a significant degree of anisotropy in their fabric, which initially is derived from the shape of the clay platelets, deposition process and one-dimensional consolidation. Various authors have proposed ... -
A field laboratory for monitoring CO2 leakage
(Journal article, 2009)The long-term safety of future CO2 storage projects in aquifers will not only rely on a comprehensive geological characterisation of the formation and capillary seal, but also on the ability to effectively monitor the ... -
A Framework for Versatile Shape of Yield Surfaces for Structured Aniso-tropic Soft Soils
(Chapter, 2016)A framework based on logarithmic contractancy is proposed to produce versatile shapes of yield surfaces for structured anisotropic clays. The recently proposed constitutive model (E-SCLAY1S) is an extension of existing ... -
A geochemical, mineralogical and geotechnical characterization of the low plastic, highly sensitive glaciomarine clay at Dragvoll, Norway
(Peer reviewed; Journal article, 2019)The sediments at the NTNU research site Dragvoll, Trondheim, Norway accumulated in seawater close to the glacier front during the Pleistocene-Holocene transition. A comprehensive site investigation and laboratory test ... -
A GIS method for assessment of rock slide tsunami hazard in Norwegian lakes and reservoirs
(Journal article, 2009)An evaluation of rock slide tsunami hazard is applied to all Norwegian lakes larger than 0.1 km2 based on their topographical setting. The analysis results in a topographic rock slide potential score that indicates the ... -
A macro-element for integrated time domain analyses representing bucket foundations for offshore wind turbines
(Peer reviewed; Journal article, 2018)The paper presents a macro-element model for bucket foundations to be used in integrated time domain analyses of offshore wind turbines. The macro-element has been formulated in the multi-surface plasticity framework, and ... -
A macro-element model for multidirectional cyclic lateral loading of monopiles in clay
(Journal article; Peer reviewed, 2018)This paper investigates numerically the impact of multidirectional cyclic loads on the response of a monopile in clay supporting an offshore wind turbine (OWT). The results indicate that multidirectional loading modifies ... -
A macro-element pile foundation model for integrated analyses of monopilebased offshore wind turbines
(Journal article; Peer reviewed, 2018)The design of OWTs relies on integrated load analyses tools that simulate the response of the entire OWT (including the rotor-nacelle assembly, support structure and foundation) under combined aerodynamic and hydrodynamic ... -
A metagenomic study of methanotrophic microorganisms in Coal Oil Point seep sediments
(Journal article, 2011) -
A metagenomic study of the microbial communities in four parallel biogas reactors
(Journal article, 2014)This study showed that four parallel reactors co-digesting manure and fish waste silage operated stably during a startup phase. Several important Archaea and Bacteria degrading the protein-rich substrate were identified. ... -
A multi-spring model for monopile analysis in soft clays
(Peer reviewed; Journal article, 2020)The offshore wind industry in China has seen a rapid development in recent years and is projected to account for half of global yearly installed capacity in the years to come. Monopiles are a popular foundation solution ... -
A New Approximate Method for Quantifying Tsunami Maximum Inundation Height Probability
(Peer reviewed; Journal article, 2019)Regional and global tsunami hazard analysis requires simplified and efficient methods for estimating the tsunami inundation height and its related uncertainty. One such approach is the amplification factor (AF) method. ... -
A New Foundation Model for Integrated Analyses of Monopile-based Offshore Wind Turbines
(Peer reviewed; Journal article, 2017)Offshore wind turbines are highly dynamic and tightly coupled systems subjected to variable cyclic loads. Designing and optimizing the support structure is a complex task, where several load scenarios have to be analysed ... -
A new method for estimation of critical speed for railway tracks on soft ground
(Peer reviewed; Journal article, 2018)This paper presents a new method, ETL (EBER Track Lab), which allows for estimation of critical speed from measurements from a running train at normal speeds. Hence, large distances can be covered in short time. The method ... -
A Novel Small-Scale Model Testing Device for Laterally Loaded Piles
(Chapter, 2020) -
A numerical study of capacity and stiffness of circular skirted foundations in clay subjected to combined static and cyclic general loading
(Peer reviewed; Journal article, 2017)Skirted foundations have been widely applied as offshore foundations for several decades. In design, the use of failure envelopes is convenient for assessing stability under combined loading. A large number of studies on ... -
A procedure for predicting the permanent rotation of monopiles in sand supporting offshore wind turbines
(Peer reviewed; Journal article, 2020)Foundations for Offshore Wind Turbines (OWTs) are designed following the limit state philosophy. One of the considered states is the Serviceability Limit State (SLS), which verifies that the permanent rotation of the ...