Arctic Offshore Engineering

Palmer, Andrew; Croasdale, Ken

doi:10.1142/8283

Cited by 32 publications

(34 citation statements)

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“…Model testing in laboratory with weakened ice and possible scaling by similitude laws are debated (Palmer and Demsey, 2009), and the current paper will not discuss these aspects further. However, there are agreements on the usefulness of model tests for sloped sided structures in which the bending and clearing processes are dominant (Palmer and Croasdale, 2013).…”

Section: Discussionmentioning

confidence: 99%

Influence of pitch motion on level ice actions

Dalane

2014

Cold Regions Science and Technology

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Section: Discussionmentioning

confidence: 99%

Influence of pitch motion on level ice actions

Dalane

2014

Cold Regions Science and Technology

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“…Different types of offshore or onshore platforms were built for the exploration of the oil and gas (Palmer and Croasdale 2013), e.g., jacket structure, gravity based structure, and even artificial island. Most of these Arctic engineering constructions were made of reinforced concrete (RC) structure or prestressed concrete (PC) structure.…”

Section: Introductionmentioning

confidence: 99%

Tests and Analysis on Thermal Expansion Behaviour of Steel Strand used in Prestressed Concrete Structure under Low Temperatures

Xie

Yan

2018

Int J Concr Struct Mater

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This paper presents the results of the tests and analysis on the coefficient of thermal expansion for the steel strand under combined low temperatures and prestressing forces. A test program was firstly carried out to study the thermal expansion behaviour of the seven-wire strand under combined different low temperatures ranging from 20 to -165°C and different prestressing levels ranging from 0 to 0.75 f t /f tk . The test results exhibited the thermal expansion behaviours of the steel strand under low temperatures in terms of thermal strain versus temperature curves, transit linear thermal expansion coefficient, and average thermal expansion coefficient. The influences of the low temperature and prestressing levels on the thermal expansion behaviours of the steel strand were separately discussed and analysed. Based on the test data, mathematical models were developed to predict the thermal expansion coefficients including transit and average of the steel strand. The developed regression models fully considered the influences of the low temperature and prestressing stresses acted on the strand. Finally, design equations were proposed to predict the transit and average thermal expansion coefficient of the steel strand under combined low temperature and prestressing forces.Keywords: cryogenic temperature, steel strand, thermal expansion coefficient, transit linear expansion coefficient, thermal strain, arctic structure, prestressed concrete structure, material properties, LNG container.Length of the steel strand at ambient temperature level

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“…• The managed ice concentration and ice floe sizes are essential parameters in the empirical formulas that estimate the ice loads on stationary Arctic offshore structures (Keinonen and Robbins [13]; Palmer and Croasdale [14]). One of the largest concerns of ice management modeling is accurately predicting not just the mean floe size resulting from an ice management system, but the floe size distribution [15].…”

Section: Introductionmentioning

confidence: 99%

“…• The identification of the ice field may provide an early warning of an ice compaction event, which can be dangerous if the ice-structure interaction mode changes from a "slurry flow"-type to a "pressured ice"-type, as defined by Wright [22] and discussed in Palmer and Croasdale [14].…”

Section: Introductionmentioning

confidence: 99%

Image processing for ice floe analyses in broken-ice model testing

Zhang

Skjetne

Metrikin

et al. 2015

Cold Regions Science and Technology

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The ice floe shape and size distribution are important ice parameters in ice-structure analyses. Before performing an analysis at full scale, the Dynamic Positioning (DP) experiments in model ice at the Hamburg Ship Model Basin (HSVA) allow for the testing of relevant image processing algorithms. A complete overview image of the ice floe distribution in the ice tank was generated from the experiments. An image processing method based on a Gradient Vector Flow (GVF) Snake and a distance transform is proposed to identify individual ice floes. Ice floe characteristics such as position, area, and size distribution are obtained. A model of the managed ice field's configuration, including identification of overlapping floes, is also proposed for further studies in ice-force numerical simulations. Finally, the proposed algorithm is applied to an ice surveillance video to further illustrate its applicability to ice management.

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Arctic Offshore Engineering

Cited by 32 publications

References 0 publications

Influence of pitch motion on level ice actions

Influence of pitch motion on level ice actions

Tests and Analysis on Thermal Expansion Behaviour of Steel Strand used in Prestressed Concrete Structure under Low Temperatures

Image processing for ice floe analyses in broken-ice model testing

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