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Proceedings Papers

Some Background for the 2023 Revision of the Recommended Practice DNV-RP-C203 Fatigue Design of Offshore Steel Structures

Inge Lotsberg, Arne Fjeldstad
Proc. ASME. OMAE2023, Volume 2: Structures, Safety, and Reliability, V002T02A027, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-104845
https://doi.org/10.1115/OMAE2023-104845
View Paper titled, Some Background for the 2023 Revision of the Recommended Practice DNV-RP-C203 Fatigue Design of Offshore Steel Structures
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Topics: Fatigue design, Ocean engineering, Pipelines, Steel
Journal Articles

Erratum: “Stress Concentration Factors at Welded Connections Between Tubular Sections and a Transverse Plate” [ASME J. Offshore Mech. Arct. Eng., 2021, 143(4), p. 041701; DOI: 10.1115/1.4049063 ]

Inge Lotsberg
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Errata
J. Offshore Mech. Arct. Eng. December 2021, 143(6): 067001.
Paper No: OMAE-21-1119
https://doi.org/10.1115/1.4052362
Published Online: September 22, 2021
View Article titled, Erratum: “Stress Concentration Factors at Welded Connections Between Tubular Sections and a Transverse Plate” [ASME J. Offshore Mech. Arct. Eng., 2021, 143(4), p. 041701; DOI: 10.1115/1.4049063 ]
Open the PDF for Erratum: “Stress Concentration Factors at Welded Connections Between Tubular Sections and a Transverse Plate” [ASME J. Offshore Mech. Arct. Eng., 2021, 143(4), p. 041701; DOI: 10.1115/1.4049063 ] in another window
Topics: Ocean engineering, Stress concentration
Journal Articles

Stress Concentration Factors at Welded Connections Between Tubular Sections and a Transverse Plate

Inge Lotsberg
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Research Papers
J. Offshore Mech. Arct. Eng. August 2021, 143(4): 041701.
Paper No: OMAE-20-1068
https://doi.org/10.1115/1.4049063
Published Online: November 25, 2020
View Article titled, Stress Concentration Factors at Welded Connections Between Tubular Sections and a Transverse Plate
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Topics: Stress concentration, Stress, Shells
Journal Articles

Development of Fatigue Design Standards for Marine Structures

Inge Lotsberg
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Research-Article
J. Offshore Mech. Arct. Eng. June 2019, 141(3): 031301.
Paper No: OMAE-17-1223
https://doi.org/10.1115/1.4041993
Published Online: January 17, 2019
View Article titled, Development of Fatigue Design Standards for Marine Structures
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Topics: Design, Fatigue, Fatigue design, Offshore structures, Ships, Stress, Marine structures, Wind turbines, Pipeline risers, Risers (Casting)
Proceedings Papers

The Rationale for Update of S-N Curves for Single Sided Girth Welds for Risers and Pipelines in DNV GL RP C-203 Based on Fatigue Performance of More Than 1700 Full Scale Fatigue Test Results

Agnes Marie Horn, Inge Lotsberg, Oddvin Orjaseater
Proc. ASME. OMAE2018, Volume 4: Materials Technology, V004T03A024, June 17–22, 2018
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2018-78408
https://doi.org/10.1115/OMAE2018-78408
View Paper titled, The Rationale for Update of S-N Curves for Single Sided Girth Welds for Risers and Pipelines in DNV GL RP C-203 Based on Fatigue Performance of More Than 1700 Full Scale Fatigue Test Results
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Topics: Fatigue, Fatigue testing, Pipeline risers, Pipelines, Risers (Casting), Welded joints, Pipes, Currents, Failure, Stress
Journal Articles

Fatigue Design Recommendations for Conical Connections in Tubular Structures

Inge Lotsberg
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Research-Article
J. Offshore Mech. Arct. Eng. February 2019, 141(1): 011604.
Paper No: OMAE-17-1225
https://doi.org/10.1115/1.4040800
Published Online: August 13, 2018
View Article titled, Fatigue Design Recommendations for Conical Connections in Tubular Structures
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Topics: Design, Fatigue design, Junctions, Shells, Stress, Stress concentration, Manufacturing
Proceedings Papers

Fatigue Design Recommendations for Conical Connections in Tubular Structures

Inge Lotsberg
Proc. ASME. OMAE2017, Volume 4: Materials Technology, V004T03A026, June 25–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2017-61144
https://doi.org/10.1115/OMAE2017-61144
View Paper titled, Fatigue Design Recommendations for Conical Connections in Tubular Structures
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Topics: Fatigue design, Manufacturing, Stress, Cylinders, Design, Fatigue, Stress concentration, Structural elements (Construction), Uncertainty, Wind turbines
Proceedings Papers

Assessment of Fatigue Strength of Welded Connections in Thick Plates

Kashif Kamran Toor, Inge Lotsberg
Proc. ASME. OMAE2017, Volume 4: Materials Technology, V004T03A036, June 25–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2017-61143
https://doi.org/10.1115/OMAE2017-61143
View Paper titled, Assessment of Fatigue Strength of Welded Connections in Thick Plates
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Topics: Fatigue strength, Plates (structures), Design, Fatigue, Stress, Wind turbines, Manufacturing, Steel
Proceedings Papers

Development of Fatigue Design Standards for Marine Structures

Inge Lotsberg
Proc. ASME. OMAE2017, Volume 9: Offshore Geotechnics; Torgeir Moan Honoring Symposium, V009T12A005, June 25–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2017-62516
https://doi.org/10.1115/OMAE2017-62516
View Paper titled, Development of Fatigue Design Standards for Marine Structures
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Topics: Fatigue design, Marine structures, Fatigue, Design, North Sea, Offshore structures, Ships, Stress, Tension-leg platforms, Wind turbines
Proceedings Papers

Background for Revision of DNVGL-RP-C203 Fatigue Design of Offshore Steel Structures in 2016

Inge Lotsberg, Arne Fjeldstad, Knut O. Ronold
Proc. ASME. OMAE2016, Volume 4: Materials Technology, V004T03A015, June 19–24, 2016
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2016-54939
https://doi.org/10.1115/OMAE2016-54939
View Paper titled, Background for Revision of DNVGL-RP-C203 Fatigue Design of Offshore Steel Structures in 2016
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Topics: Fatigue design, Ocean engineering, Steel, Surface roughness, Cathodic protection, Coating processes, Coatings, Fatigue, Manufacturing, Pipelines
Proceedings Papers

Stress Concentration Factors for Butt Welds in Plated Structures

Inge Lotsberg, Harald Rove
Proc. ASME. OMAE2014, Volume 5: Materials Technology; Petroleum Technology, V005T03A008, June 8–13, 2014
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2014-23316
https://doi.org/10.1115/OMAE2014-23316
View Paper titled, Stress Concentration Factors for Butt Welds in Plated Structures
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Topics: Stress concentration, Welded joints, Plates (structures), Geometry, Accounting, Fatigue analysis, Finite element analysis, Manufacturing, Semi-submersible offshore structures, Ships
Proceedings Papers

Assessment of the Size Effect in Fatigue Analysis of Butt Welds and Cruciform Joints

Inge Lotsberg
Proc. ASME. OMAE2014, Volume 5: Materials Technology; Petroleum Technology, V005T03A004, June 8–13, 2014
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2014-23187
https://doi.org/10.1115/OMAE2014-23187
View Paper titled, Assessment of the Size Effect in Fatigue Analysis of Butt Welds and Cruciform Joints
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Topics: Fatigue analysis, Size effect, Welded joints, Design, Fatigue design, Fatigue testing, Calibration, Dynamic testing (Materials), Electromagnetic scattering, Fatigue
Proceedings Papers

A New Recommended Practice for Inspection Planning of Fatigue Cracks in Offshore Structures Based on Probabilistic Methods

Inge Lotsberg, Gudfinnur Sigurdsson
Proc. ASME. OMAE2014, Volume 5: Materials Technology; Petroleum Technology, V005T03A005, June 8–13, 2014
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2014-23188
https://doi.org/10.1115/OMAE2014-23188
View Paper titled, A New Recommended Practice for Inspection Planning of Fatigue Cracks in Offshore Structures Based on Probabilistic Methods
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Topics: Fatigue cracks, Inspection, Offshore structures, Fatigue, Fracture (Materials), Fracture mechanics, In-service inspection, Probability, Design, Education
Proceedings Papers

Assessment of Capacity of Grouted Connections in Piled Jacket Structures

Inge Lotsberg, Gunnar Solland
Proc. ASME. OMAE2013, Volume 2B: Structures, Safety and Reliability, V02BT02A003, June 9–14, 2013
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2013-10850
https://doi.org/10.1115/OMAE2013-10850
View Paper titled, Assessment of Capacity of Grouted Connections in Piled Jacket Structures
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Topics: Compressive stress, Databases, Design, Dynamic testing (Materials), Failure mechanisms, Fatigue, Pressure, Steel, Stress, Tension
Proceedings Papers

Fatigue Life Improvement of Welded Doubling Plates

Inge Lotsberg, Arne Fjeldstad, Morten Ro Helsem, Narve Oma
Proc. ASME. OMAE2012, Volume 6: Materials Technology; Polar and Arctic Sciences and Technology; Petroleum Technology Symposium, 195-202, July 1–6, 2012
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2012-83683
https://doi.org/10.1115/OMAE2012-83683
View Paper titled, Fatigue Life Improvement of Welded Doubling Plates
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Topics: Fatigue, Fatigue life, Grinding, Plates (structures)
Proceedings Papers

On the Derivation of Design S-N Curves Based on Limited Fatigue Test Data

Inge Lotsberg, Knut O. Ronold
Proc. ASME. OMAE2011, Volume 3: Materials Technology; Jan Vugts Symposium on Design Methodology of Offshore Structures; Jo Pinkster Symposium on Second Order Wave Drift Forces on Floating Structures; Johan Wichers Symposium on Mooring of Floating Structures in Waves, 131-139, June 19–24, 2011
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2011-49175
https://doi.org/10.1115/OMAE2011-49175
View Paper titled, On the Derivation of Design S-N Curves Based on Limited Fatigue Test Data
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Topics: Design, Fatigue testing
Proceedings Papers

Development of Structural Steel With High Resistance to Fatigue Crack Initiation and Growth: Part 4

Noboru Konda, Kazushige Arimochi, Akinori Inami, Yukichi Takaoka, Takumi Yoshida, Inge Lotsberg
Proc. ASME. OMAE2011, Volume 3: Materials Technology; Jan Vugts Symposium on Design Methodology of Offshore Structures; Jo Pinkster Symposium on Second Order Wave Drift Forces on Floating Structures; Johan Wichers Symposium on Mooring of Floating Structures in Waves, 297-306, June 19–24, 2011
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2011-49501
https://doi.org/10.1115/OMAE2011-49501
View Paper titled, Development of Structural Steel With High Resistance to Fatigue Crack Initiation and Growth: Part 4
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Topics: Fatigue cracks, Structural steel, Steel, Fatigue strength, Design, Fatigue, Fatigue properties, Fracture (Materials), Ships, Welded joints
Proceedings Papers

On the Structural Capacity of Grouted Connections in Offshore Structures

Inge Lotsberg, Andrzej Serednicki, Espen Cramer, Ha˚kon Bertnes, Per Enggaard Haahr
Proc. ASME. OMAE2011, Volume 3: Materials Technology; Jan Vugts Symposium on Design Methodology of Offshore Structures; Jo Pinkster Symposium on Second Order Wave Drift Forces on Floating Structures; Johan Wichers Symposium on Mooring of Floating Structures in Waves, 667-677, June 19–24, 2011
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2011-49169
https://doi.org/10.1115/OMAE2011-49169
View Paper titled, On the Structural Capacity of Grouted Connections in Offshore Structures
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Topics: Offshore structures, Wind, Design, Dynamic testing (Materials), Flow (Dynamics), Ocean engineering, Safety
Proceedings Papers

System Effects in Fatigue Design of Long Pipes and Pipelines

Inge Lotsberg, Kim Mo̸rk, Sverre Valsga˚rd, Gudfinnur Sigurdsson
Proc. ASME. OMAE2010, 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 6, 117-124, June 6–11, 2010
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2010-20647
https://doi.org/10.1115/OMAE2010-20647
View Paper titled, System Effects in Fatigue Design of Long Pipes and Pipelines
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Topics: Cylinders, Design, Fatigue, Fatigue design, Manufacturing, Pipelines, Pipes, Safety, Transportation systems
Proceedings Papers

Background for New Revision of DNV-RP-C203 Fatigue Design of Offshore Steel Structures

Inge Lotsberg
Proc. ASME. OMAE2010, 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 6, 125-134, June 6–11, 2010
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2010-20649
https://doi.org/10.1115/OMAE2010-20649
View Paper titled, Background for New Revision of DNV-RP-C203 Fatigue Design of Offshore Steel Structures
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Topics: Fatigue design, Ocean engineering, Steel