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    Rights statement: This is the author’s version of a work that was accepted for publication in Ocean Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Ocean Engineering, 195, 2020 DOI: 10.1016/j.oceaneng.2019.106194

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On environmental contours for marine and coastal design

Research output: Contribution to journalJournal articlepeer-review

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On environmental contours for marine and coastal design. / Ross, E.; Astrup, O.C.; Bitner-Gregersen, E.; Bunn, N.; Feld, G.; Gouldby, B.; Huseby, A.; Liu, Y.; Randell, D.; Vanem, E.; Jonathan, Philip.

In: Ocean Engineering, Vol. 195, 106194, 01.01.2020.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Ross, E, Astrup, OC, Bitner-Gregersen, E, Bunn, N, Feld, G, Gouldby, B, Huseby, A, Liu, Y, Randell, D, Vanem, E & Jonathan, P 2020, 'On environmental contours for marine and coastal design', Ocean Engineering, vol. 195, 106194. https://doi.org/10.1016/j.oceaneng.2019.106194

APA

Ross, E., Astrup, O. C., Bitner-Gregersen, E., Bunn, N., Feld, G., Gouldby, B., Huseby, A., Liu, Y., Randell, D., Vanem, E., & Jonathan, P. (2020). On environmental contours for marine and coastal design. Ocean Engineering, 195, [106194]. https://doi.org/10.1016/j.oceaneng.2019.106194

Vancouver

Ross E, Astrup OC, Bitner-Gregersen E, Bunn N, Feld G, Gouldby B et al. On environmental contours for marine and coastal design. Ocean Engineering. 2020 Jan 1;195. 106194. https://doi.org/10.1016/j.oceaneng.2019.106194

Author

Ross, E. ; Astrup, O.C. ; Bitner-Gregersen, E. ; Bunn, N. ; Feld, G. ; Gouldby, B. ; Huseby, A. ; Liu, Y. ; Randell, D. ; Vanem, E. ; Jonathan, Philip. / On environmental contours for marine and coastal design. In: Ocean Engineering. 2020 ; Vol. 195.

Bibtex

@article{c654e2005e6941b486b14ef97774c8ef,
title = "On environmental contours for marine and coastal design",
abstract = "Environmental contours are used in structural reliability analysis of marine and coastal structures as an approximate means to locate the boundary of the distribution of environmental variables, and hence sets of environmental conditions giving rise to extreme structural loads and responses. Outline guidance concerning the application of environmental contour methods is given in recent design guidelines from many organisations. However there is lack of clarity concerning (a) the differences between approaches to environmental contour estimation reported in the literature, and (b) the relationship between the environmental contour, corresponding to some return period, and the extreme structural response for the same period. Hence there is uncertainty about precisely when environmental contours should be used, and how they should be used well. This article seeks to provide some assistance in understanding the fundamental issues regarding environmental contours and their use in structural reliability analysis. Approaches to estimating the joint distribution of environmental variables, and to estimating environmental contours based on that distribution, are described. Simple freely-available software for estimation of the joint distribution, and hence environmental contours, is illustrated. Extra assumptions required to relate the characteristics of environmental contours to structural failure are outlined. Alternative response-based methods not requiring environmental contours are summarised. The results of an informal survey of the metocean user community regarding environmental contours are presented. Finally, recommendations about when and how environmental contour methods should be used are made.",
author = "E. Ross and O.C. Astrup and E. Bitner-Gregersen and N. Bunn and G. Feld and B. Gouldby and A. Huseby and Y. Liu and D. Randell and E. Vanem and Philip Jonathan",
note = "This is the author{\textquoteright}s version of a work that was accepted for publication in Ocean Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Ocean Engineering, 195, 2020 DOI: 10.1016/j.oceaneng.2019.106194 ",
year = "2020",
month = jan,
day = "1",
doi = "10.1016/j.oceaneng.2019.106194",
language = "English",
volume = "195",
journal = "Ocean Engineering",
issn = "0029-8018",
publisher = "Elsevier Ltd",

}

RIS

TY - JOUR

T1 - On environmental contours for marine and coastal design

AU - Ross, E.

AU - Astrup, O.C.

AU - Bitner-Gregersen, E.

AU - Bunn, N.

AU - Feld, G.

AU - Gouldby, B.

AU - Huseby, A.

AU - Liu, Y.

AU - Randell, D.

AU - Vanem, E.

AU - Jonathan, Philip

N1 - This is the author’s version of a work that was accepted for publication in Ocean Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Ocean Engineering, 195, 2020 DOI: 10.1016/j.oceaneng.2019.106194

PY - 2020/1/1

Y1 - 2020/1/1

N2 - Environmental contours are used in structural reliability analysis of marine and coastal structures as an approximate means to locate the boundary of the distribution of environmental variables, and hence sets of environmental conditions giving rise to extreme structural loads and responses. Outline guidance concerning the application of environmental contour methods is given in recent design guidelines from many organisations. However there is lack of clarity concerning (a) the differences between approaches to environmental contour estimation reported in the literature, and (b) the relationship between the environmental contour, corresponding to some return period, and the extreme structural response for the same period. Hence there is uncertainty about precisely when environmental contours should be used, and how they should be used well. This article seeks to provide some assistance in understanding the fundamental issues regarding environmental contours and their use in structural reliability analysis. Approaches to estimating the joint distribution of environmental variables, and to estimating environmental contours based on that distribution, are described. Simple freely-available software for estimation of the joint distribution, and hence environmental contours, is illustrated. Extra assumptions required to relate the characteristics of environmental contours to structural failure are outlined. Alternative response-based methods not requiring environmental contours are summarised. The results of an informal survey of the metocean user community regarding environmental contours are presented. Finally, recommendations about when and how environmental contour methods should be used are made.

AB - Environmental contours are used in structural reliability analysis of marine and coastal structures as an approximate means to locate the boundary of the distribution of environmental variables, and hence sets of environmental conditions giving rise to extreme structural loads and responses. Outline guidance concerning the application of environmental contour methods is given in recent design guidelines from many organisations. However there is lack of clarity concerning (a) the differences between approaches to environmental contour estimation reported in the literature, and (b) the relationship between the environmental contour, corresponding to some return period, and the extreme structural response for the same period. Hence there is uncertainty about precisely when environmental contours should be used, and how they should be used well. This article seeks to provide some assistance in understanding the fundamental issues regarding environmental contours and their use in structural reliability analysis. Approaches to estimating the joint distribution of environmental variables, and to estimating environmental contours based on that distribution, are described. Simple freely-available software for estimation of the joint distribution, and hence environmental contours, is illustrated. Extra assumptions required to relate the characteristics of environmental contours to structural failure are outlined. Alternative response-based methods not requiring environmental contours are summarised. The results of an informal survey of the metocean user community regarding environmental contours are presented. Finally, recommendations about when and how environmental contour methods should be used are made.

U2 - 10.1016/j.oceaneng.2019.106194

DO - 10.1016/j.oceaneng.2019.106194

M3 - Journal article

VL - 195

JO - Ocean Engineering

JF - Ocean Engineering

SN - 0029-8018

M1 - 106194

ER -