Institutt for bygg- og miljøteknikk
Recent Submissions
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On gradient-based optimization of jacket structures for offshore wind turbines
(Journal article; Peer reviewed, 2018)During the bidding or very early design phases of jacket structures for offshore wind turbines, there may be very limited information available on meteorological conditions, soil conditions, turbine specifications, etc. ... -
Effects of Flow Dynamics on Bank Erosion in Consecutive Meander Bends - A Field Study
(Doctoral theses at NTNU;2019:152, Doctoral thesis, 2019)The present dissertation describes the influence of natural alteration in the rivers flow regime on the change of morphology of a freely meandering river in Norway. It consists of a thesis and four attached research papers. ... -
A modelling framework to support environmental design in regulated rivers
(Doctoral theses at NTNU;2019:141, Doctoral thesis, 2019)Despite the fact that environmental design and mitigation measures in regulated rivers have been widely applied in the last decades, yet it is still a challenge to find a method that supports a sustainable balance between ... -
Experimental and numerical studies related to failure of first-year ice ridges against fixed vertically sided structures
(Doctoral theses at NTNU;2019:192, Doctoral thesis, 2019) -
PRELIMINARY FLOOD RISK ANALYSIS FOR CLIMATE CHANGE SCENARIOS: THE CASE STUDY OF THE ORKLA RIVER SYSTEM
(Master thesis, 2018)Formålet med denne endelige masteroppgaven er å analysere flomrisiko i Orkla-elven, lokalisert i Sor Trondelag (Norge). Arbeidet dekker den nåværende situasjonen for å analysere fremover klimaendringene og analysere ... -
FE8 type laboratory testing of white etching crack (WEC) bearing failure mode in 100Cr6
(Journal article; Peer reviewed, 2019)WEC is an aggressive and unpredictable failure mode affecting bearings in particular in the wind energy sector. This paper focuses on the most common used method for WEC laboratory accelerated testing, the FE8 type test ... -
Medium-scale consolidation of artificial ice ridge – Part I: surface temperature, thickness and mechanical properties
(Journal article; Peer reviewed, 2019)This paper is describing preparations and methods of medium-scale ridge consolidation experiment and development of ridge and surrounding level ice morphological, thermal, and mechanical characteristics for the experiment, ... -
Utilization of Aerogel Materials and Systems in the Building Envelopes of Tomorrow
(Chapter, 2019)Building envelopes incorporating aerogel materials may exploit miscellaneous properties of the aerogels such as a very low thermal conductivity, lightweight properties due the air-filled low-density aerogel structure, and ... -
Determinants of Exposure and Variability of Trihalomethanes in the Air of Three Indoor Swimming Pools
(Journal article; Peer reviewed, 2019)Introduction Negative health effects related to long-term exposure to volatile trihalomethanes (THMs) formed during the chlorination of pool water is recognized, but the determinants causing the concentrations to vary ... -
Laboratory investigation of performance of a screen type debris-flow countermeasure
(Journal article; Peer reviewed, 2018)Debris-flows are forms of landslides in mountainous regions that can potentially cause significant damage. Structural countermeasures to mitigate an entire debris-flow may become unrealistically massive and expensive. If ... -
An Ecological Adaptive Cruise Control for Mixed Traffic and Its Stabilization Effect
(Journal article; Peer reviewed, 2019)With the rapid development of technologies, the ecological control strategies of connected and autonomous vehicle (CAV) technologies are gaining more and more attention. In this paper, a rule-based ecological cruise control, ... -
Minimum requirements to ice management barrier systems
(Journal article; Peer reviewed, 2019)Ice management (IM) is defined as all activities carried out with the objective of mitigating hazardous situations by reducing or avoiding actions from any kind of ice features to a protected unit (e.g. a drilling vessel). ... -
Sampling Methods For Simplified Offshore Wind Turbine Support Structures Load Case Assessment
(Chapter, 2018)In this work, we present four different methodologies for reducing the computational effort of fatigue assessment for offshore wind turbine support structures. To test these methods, we use them to predict the total fatigue ... -
Markov approach to estimate fatigue damage for monopile-based offshore wind turbines
(Chapter, 2018)The Markov approach to estimate fatigue damage for a monopile-based offshore wind turbine exposed to aerodynamic and hydrodynamic loading is investigated in this study. The focus of this study is on obtaining the ... -
Modeling Uncertainty in Extrapolated Extreme Loads for Offshore Wind Turbine Support Structures
(Chapter, 2018)In this paper we show how a new idea for how to calculate the derivatives of extrapolated 50-year return values, used in extreme load safety criteria, can be used to estimate the uncertainty in these return values resulting ... -
Fatigue Damage on Offshore Wind Turbines by a Cell Mapping Method
(Journal article; Peer reviewed, 2018)Due to large variability of the offshore environment, the load analysis of an offshore wind turbine is a complex task. It is normally performed in the time domain, by running stochastic simulations. This is usually very ... -
Identification of salmon population bottlenecks from low flows in a hydro-regulated river
(Journal article; Peer reviewed, 2019)Flow regime alterations from hydropower regulation may impact fish populations. Impacts can be characterized using methods for mapping bottlenecks for different species life stages. Improving the understanding of such ... -
Use of Markov decision processes in the evaluation of corrective maintenance scheduling policies for offshore wind farms
(Journal article; Peer reviewed, 2019)Optimization of the maintenance policies for offshore wind parks is an important step in lowering the costs of energy production from wind. The yield from wind energy production is expected to fall, which will increase the ... -
Risk Management in Procurement of Blue-Green Roofs – A Project Owner Perspective
(Conference object, 2019)Blue-green roofs are vegetated roofs used for stormwater management purposes. With the roof serving several different purposes at the same time, the risk that any of its functions could be compromised needs to be addressed. ... -
Load case reducation for offshore wind turbine support structure fatigue assessment by importance sampling with two-stage filtering
(Journal article; Peer reviewed, 2019)A complete fatigue assessment for operational conditions for offshore wind turbines involves simulating thousands of environmental states. For applications such as optimization, where this assessment needs to be repeated ...
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