The objective of the present work is to carry out the strength assessment of jacket offshore wind turbine support structures subjected to progressive rupture. A defect existing in a structure made during the fabrication may turn into a small-scale rupture and because of the high-stress concentration and low-cycle fatigue load. Therefore, the ultimate load-carrying capacity of the support structure is analyzed accounting for the progress of the rupture until the leg component experiences a full rupture along its circumference. The effect of imperfection severity is also investigated. The moment–curvature relationship of the structure concerning the studied cases is presented. Furthermore, the jacket support structures, at different water depths, are also analyzed and discussed. Finally, some of the leg components are removed one by one to study the redundancy of the jacket support structure at 80-m water depth.

References

References
1.
Lozano-Minguez
,
E.
,
Kolios
,
A. J.
, and
Brennan
,
F. P.
,
2011
, “
Multi-Criteria Assessment of Offshore Wind Turbine Support Structures
,”
Renew. Energy
,
36
(
11
), pp.
2831
2837
.
2.
Labenski
,
J.
, and
Moormann
,
C.
,
2016
, “
A Parametric Study of Different Analytical Design Methods to Determine the Axial Bearing Capacity of Monopiles
,”
Geomech. Energy Environ.
,
6
, pp.
70
80
.
3.
Martinez-Luengo
,
M.
,
Kolios
,
A.
, and
Wang
,
L.
,
2017
, “
Parametric FEA Modelling of Offshore Wind Turbine Support Structures: Towards Scaling-Up and CAPEX Reduction
,”
Int. J. Mar. Energy
,
19
, pp.
16
31
.
4.
Negro
,
V.
,
López-Gutiérrez
,
J.-S.
,
Esteban
,
M. D.
,
Alberdi
,
P.
,
Imaz
,
M.
, and
Serraclara
,
J.-M.
,
2017
, “
Monopiles in Offshore Wind: Preliminary Estimate of Main Dimensions
,”
Ocean Eng.
,
133
, pp.
253
261
.
5.
Morató
,
A.
,
Sriramula
,
S.
,
Krishnan
,
N.
, and
Nichols
,
J.
,
2017
, “
Ultimate Loads and Response Analysis of a Monopile Supported Offshore Wind Turbine Using Fully Coupled Simulation
,”
Renew. Energy
,
101
, pp.
126
143
.
6.
Kallaby
,
J.
, and
Millman
,
D. N.
, “
Inelastic Analysis of Fixed Offshore Platforms for Earthquake Loading, OTC-2357-MS
,”
Proceedings of the Offshore Technology Conference (OTC)
, pp.
1
12
.
7.
Bolt
,
H. M.
, “
Results From Large Scale Ultimate Strength Tests of K-Braced Jacket Frame Structures
,”
Proceedings of the Offshore Technology Conference, OTC 7783.
8.
Ueda
,
Y.
,
Rashed
,
S. M. H.
,
Ishihama
, and
Nakacho
,
K.
, “
Flexibility and Yield Strength of Joints in Analysis of Tubular Offshore Structures
,”
Proceedings of the Fifth International Symposium on Offshore Mechanics and Arctic Engineering
,
ASME
, pp.
293
302
.
9.
Moan
,
T.
,
Amdahl
,
J.
,
Engseth
,
A. G.
, and
Granli
,
T.
,
1985
, “
Collapse Behaviour of Truss Steel Platforms
,”
Proceedings of the 4th International Conference on Behaviour of Offshore Structures, BOSS '85
,
Delft, The Netherlands
, Behaviour of Offshore Structures, Amsterdam, pp.
255
269
.
10.
Hellan
,
O.
,
Tandberg
,
T.
, and
Hellevig
,
N. C.
,
1993
, “
Nonlinear Reassessment of Jacket Structures Under Extreme Storm Cyclic Loading. Pan–IV, Case Studies on Existing North Sea
,”
Proceedings of the 12th International Conference on Offshore Mechanics & Arctic Engineering, OMAE
,
ASME
, pp.
529
542
.
11.
Yeter
,
B.
,
Garbatov
,
Y.
, and
Guedes Soares
,
C.
,
2019
, “
Ultimate Strength Assessment of Jacket Offshore Wind Turbine Support Structures Subjected to Progressive Bending Loading
,”
Ships Offshore Struct.
,
14
(
2
), pp.
165
175
.
12.
Faulkner
,
D.
,
1975
, “
A Review of Effective Plating for Use in the Analysis of Stiffened Plating in Bending and Compression
,”
J. Ship Res.
,
19
(
1
), pp.
1
17
.
13.
Faulkner
,
D.
,
1977
, “Compression Tests on Welded Eccentrically Stiffened Plate Panels,”
Steel Plated Structures
,
P. J.
Dowling
,
J. E.
Harding
, and
P. A.
Frieze
, eds.,
Crosby Lockwood Staples
,
London
, pp.
130
139
.
14.
Nordal
,
H.
,
1991
, “Application of Ultimate Strength Analysis in Design of Offshore Structural Systems,”
Integrity of Offshore Structures–4
,
D.
Faulkner
,
M. J.
Cowling
, and
A.
Incecik
, eds.,
Elsevier Applied Science
,
London and New York
, pp.
153
167
.
15.
Guedes Soares
,
C.
, and
Kmiecik
,
M.
,
1993
, “
Simulation of the Ultimate Compressive Strength of Unstiffened Rectangular Plates
,”
Mar. Struct.
,
6
(
5–6
), pp.
553
569
.
16.
Guedes Soares
,
C.
,
Luís
,
R. M.
,
Nikolov
,
P.
,
Dowes
,
J.
,
Taczala
,
M.
,
Modiga
,
M.
,
Quesnel
,
T.
,
Toderan
,
C.
, and
Samuelides
,
M.
,
2008
, “
Benchmark Study on the Use of Simplified Structural Codes to Predict the Ultimate Strength of a Damaged Ship Hull
,”
Int. Shipbuild. Prog.
,
55
(
1–2
), pp.
87
107
.
17.
Zhang
,
J.
,
Shen
,
Z.
,
Ji
,
C.
, and
Yin
,
Q.
,
2012
, “
The Influence Research of Ultimate Strength to Deepwater Semi-Submersible Platforms Structure Under Corrosion Damage
,”
Proceedings of the ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering
,
Rio de Janeiro, Brazil
, ASME, Volume 1: Offshore Technology, pp.
423
429
.
18.
Khedmati
,
M. R.
, and
Nazari
,
M.
,
2012
, “
A Numerical Investigation Into Strength and Deformation Characteristics of Preloaded Tubular Members Under Lateral Impact Loads
,”
Mar. Struct.
,
25
(
1
), pp.
33
57
.
19.
DNVGL
,
2016
,
Recommended Practice, DNVGL-RP-C203, Appendix F Comm. Low Cycle and High Cycle Fatigue
, pp. 176–179.
20.
DNV
,
2013
,
Offshore Standards, DNV-OS-J101, Det Norske Veritas AS
, Sec.7 Design of Steel Structures, pp.
135
.
21.
NORSOK
,
2009
, “
Assessment of Structural Integrity for Existing Offshore Load-Bearing Structures
,” N-006, 1st ed., Comm 8.4.5, pp.
46
48
.
22.
Yeter
,
B.
,
Garbatov
,
Y.
, and
Guedes Soares
,
C.
,
2016
, “Modular Jacket Offshore Wind Turbine Support Structure for the North Portuguese Coastal Zone,”
Progress in Renewable Energies
,
C.
Guedes Soares
, ed.,
Taylor & Francis Group
,
London, UK
, pp.
655
663
.
23.
Yeter
,
B.
,
Garbatov
,
Y.
, and
Guedes Soares
,
C.
,
2016
, “Structural Design of an Adaptable Jacket Offshore Wind Turbine Support Structure for Deeper Waters,”
Maritime Technology and Engineering 3
,
C.
Guedes Soares
, and
T. A.
Santos
, eds.,
Taylor & Francis Group
,
UK
, pp.
583
594
.
24.
Yeter
,
B.
,
Garbatov
,
Y.
, and
Guedes Soares
,
C.
,
2017
“System Reliability of a Jacket Offshore Wind Turbine Subjected to Fatigue,”
Progress in the Analysis and Design of Marine Structures
,
C.
Guedes Soares
, and
Y.
Garbatov
, eds.,
Taylor & Francis Group
,
London, UK
, pp.
939
950
.
25.
ansys
,
2009
, “
Advanced Analysis Techniques Guide
,”
Ansys, Inc, South Pointe
,
Canonsburg, PA
.
26.
Yeter
,
B.
,
Garbatov
,
Y.
, and
Guedes Soares
,
C.
,
2016
, “
Reliability of Offshore Wind Turbine Support Structures Subjected to Extreme Wave-Induced Loads and Defects
,”
Proceedings of the 35th International Conference on Ocean, Offshore and Arctic Engineering, OMAE16
,
Busan, South Korea
, Volume 3: Structures, Safety and Reliability, V003T02A060, pp.
1
8
, American Society of Mechanical Engineers.
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