Gerhard Ersdal

Professor

Logo UiS

Contact

Email: gerhard.ersdal@uis.no

Department

Faculty of Science and Technology

Department of Mechanical and Structural Engineering and Materials Science

Publications

Vitenskapelige publikasjoner

Riise, Simen; Atteya, Mostafa Ahmed; Mikkelsen, Ove; Ersdal, Gerhard

(2023)

Experimental assessment of cracked tubular joints repaired with crack-deflecting holes and weld-toe grinding.

IOP Conference Series: Materials Science and Engineering.

ISSN 1757-8981.

DOI: 10.1088/1757-899X/1294/1/012032

Ersdal, Gerhard; Atteya, Mostafa Ahmed; Mikkelsen, Ove

(2023)

Statistical evaluation of tubular joint SCFs from test data and finite element analyses.

IOP Conference Series: Materials Science and Engineering.

ISSN 1757-8981.

DOI: 10.1088/1757-899X/1294/1/012033

Sharp, John; Salama, Mamdouh M.; Ersdal, Gerhard; Stacey, Alexander

(2022)

Life extension and integrity management of ageing pipelines . I: Ageing and life extension of offshore facilities : Proceedings of the ASME 2021 International conference on asset integrity management .

The American Society of Mechanical Engineers (ASME).

ISBN 9780791885789.

s.233-239.

DOI: 10.1115/1.885789_ch17

Ersdal, Gerhard; Halsne, Marita; Oma, Narve; Andersen, Terje L; Langøy, Morten Andre; Bjørheim, Lars Geir

(2022)

Semisubmersible in Service Experiences on the Norwegian Continental Shelf . I: ASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering Volume 3: Materials Technology; Pipelines, Risers, and Subsea Systems.

The American Society of Mechanical Engineers (ASME).

ISBN 978-0-7918-8587-1.

DOI: 10.1115/OMAE2022-81289

Atteya, Mostafa Ahmed; Mikkelsen, Ove; Wintle, John; Ersdal, Gerhard

(2021)

Experimental and numerical study of the elastic SCF of tubular joints.

Materials.

ISSN 1996-1944.

Volum 14.

Hefte 15.

DOI: 10.3390/ma14154220

Sigvaldsen, Marie; Ersdal, Gerhard; Markeset, Gro; Samarakoon, Mudiyansele Samindi Manjula K; Langeteig, Magne

(2021)

Capacity of Concrete Structures with Corroded Reinforcement and Prestressing Tendons.

IOP Conference Series: Materials Science and Engineering.

ISSN 1757-8981.

Volum 1201.

DOI: 10.1088/1757-899X/1201/1/012052

Atteya, Mostafa Ahmed; Mikkelsen, Ove; Oma, Narve; Ersdal, Gerhard

(2021)

Residual strength of tubular columns with localized thickness loss. I: ASME 2021 40th international conference on ocean, offshore and arctic engineering : Volume 3: Materials technology.

The American Society of Mechanical Engineers (ASME).

ISBN 9780791885130.

DOI: 10.1115/OMAE2021-62213

Atteya, Mostafa Ahmed; Mikkelsen, Ove; Pavlou, Dimitrios; Ersdal, Gerhard

(2020)

Crack arresting with crack deflecting holes in steel plates. I: ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering - Volume 3: Materials Technology.

The American Society of Mechanical Engineers (ASME).

ISBN 978-0-7918-8434-8.

DOI: 10.1115/OMAE2020-19358

Moan, Torgeir; Amdahl, Jørgen; Ersdal, Gerhard

(2019)

Assessment of ship impact risk to offshore structures - New NORSOK N-003 guidelines.

Marine Structures.

ISSN 0951-8339.

Volum 63.

s.480-494.

DOI: 10.1016/j.marstruc.2017.05.003

Ersdal, Gerhard; Sharp, John; Stacey, Alexander

(2019)

Ageing and life extension of offshore structures : The challenge of managing structural integrity.

Wiley-Blackwell.

ISBN 9781119284390.

Vo, Tri Minh; Hestholm, Kristoffer; Ersdal, Gerhard; Oma, Narve; Sivertsvik, Matias

(2019)

Buckling capacity of simulated patch corroded tubular columns – laboratory tests.

IOP Conference Series: Materials Science and Engineering.

ISSN 1757-8981.

Volum 700.

Hefte 1.

DOI: 10.1088/1757-899X/700/1/012029

Neeraas, Håkon; Ersdal, Gerhard; Oma, Narve; Hellevig, Nils-Christian

(2019)

Inspection planning for fatigue cracks in offshore structures by Monte Carlo simulations.

IOP Conference Series: Materials Science and Engineering.

ISSN 1757-8981.

Volum 700.

Hefte 1.

DOI: 10.1088/1757-899X/700/1/012030

Ersdal, Gerhard; Oma, Narve

(2019)

Investigation of updating methods for probability-informed inspection planning for offshore structures.

IOP Conference Series: Materials Science and Engineering.

ISSN 1757-8981.

Volum 700.

Hefte 1.

DOI: 10.1088/1757-899X/700/1/012034

Sæstad, Alexander; Ersdal, Gerhard; Siriwardane , S.A. Sudath C.

(2016)

Comparison of Deterministic and Probabilistic Fatigue Assessment Methods: A Case Study of a Road Bridge. I: 19th Congress of IABSE, Challenges in Design and Construction of an Innovative and Sustainable Built Environment.

International Association for Bridge and Structural Engineering.

ISBN 978-3-85748-144-4.

s.275-283.

Tharaldsen, Jorunn Elise; Wiig, Siri; Østnes, Hilde Karin; Ersdal, Gerhard; Hinderaker, Rolf H.; Lootz, Elisabeth; Knudsen, Sigve; Hanson, Bjørn Andreas; Dybvig, Gunnar; Lauridsen, Øyvind

(2013)

A System Perspective on Organizational Learning. I: SPE European HSE Conference and Exhibition - Health, Safety, Environment and Social Responsibility in the Oil &Gas Exploration, Apr 16 - 18, 2013 2013, London, United Kingdom.

Society of Petroleum Engineers.

ISBN 978161399256-2.

DOI: 10.2118/164999-MS

Wiig, Siri; Ersdal, Gerhard; Guldbrandsen, Tone; Hanson, Bjørn Andreas; Tharaldsen, Jorunn Elise; Dybvig, Gunnar; Dahle, Irene Bergljot

(2012)

Major accidents and their consequences for risk regulation. I: Advances in Safety, Reliability and Risk Management - proceedings of the European Safety and Reliability Conference, ESREL 2011.

CRC Press.

ISBN 978-0-415-68379-1.

s.33-41.

Hörnlund, Erik; Ersdal, Gerhard; Hinderaker, Rolf H.; Johnsen, Roy; Sharp, John M.

(2011)

Material Issues in Ageing and Life Extension (OMAE2011-49363). I: 30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2011) - Vol. III.

The American Society of Mechanical Engineers (ASME).

ISBN 978-0-7918-4435-9.

s.261-267.

Håbrekke, Solfrid; Bodsberg, Lars; Hokstad, Per; Ersdal, Gerhard

(2011)

Issues for Consideration in Life Extension and Managing Ageing Facilities. I: 30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2011) - Vol. III.

The American Society of Mechanical Engineers (ASME).

ISBN 978-0-7918-4435-9.

s.173-182.

DOI: 10.1115/omae2011-49261

Ersdal, Gerhard; Aven, Terje

(2008)

Risk informed decision-making and its ethical basis.

Reliability Engineering & System Safety.

ISSN 0951-8320.

Volum 93.

Hefte 2.

s.197-205.

DOI: 10.1016/j.ress.2006.12.018

Ersdal, Gerhard; Aven, Terje

(2008)

Risk management and its ethical basis.

Reliability Engineering & System Safety.

ISSN 0951-8320.

Volum 92.

Hefte 2.

s.197-205.

Bøker og kapitler

Pavlou, Dimitrios; Correia, José A.F.O.; Fazeres-Ferradosa, Tiago; Gudmestad, Ove Tobias; Siriwardane , Sudath C.; Lemu, Hirpa G.; Ersdal, Gerhard; Liyanage, Jayantha Prasanna; Hansen, Vidar Folke; Minde, Mona Wetrhus; RATNAYAKE MUDIYANSELAGE, Chandima; Delimitis, Andreas; El-Thalji, Idriss; Adasooriya, Mudiyan Nirosha Damayanthi; Samarakoon, Samarakoon Mudiyansele Samindi; Hemmingsen, Tor

(2024)

Analytical and experimental methods in mechanical and civil engineering : Contributions of the 1st olympiad in engineering science (OES 2023).

Springer Nature.

ISBN 978-3-031-49722-3.

Volum 28.

Hefte ..

Salama, Mamdouh M.; Stacey, Alexander; Ersdal, Gerhard

(2022)

Ageing and life extension of offshore facilities : Proceedings of the ASME 2021 International conference on asset integrity management .

The American Society of Mechanical Engineers (ASME).

ISBN 9780791885789.

Sharp, John V; Ersdal, Gerhard

(2021)

Underwater Inspection and Repair for Offshore Structures.

John Wiley & Sons.

ISBN 9781119633792.

Aven, Terje; Ersdal, Gerhard

(2005)

Risk management and its ethical basis.

Formidling

Salama, Mamdouh M.; Stacey, Alexander; Ersdal, Gerhard

(2022)

Remaining Technical Gaps . I: Ageing and life extension of offshore facilities : Proceedings of the ASME 2021 International conference on asset integrity management .

The American Society of Mechanical Engineers (ASME).

ISBN 9780791885789.

DOI: 10.1115/1.885789_pt6.i1

Atteya, Mostafa Ahmed; Mikkelsen, Ove; Pavlou, Dimitrios; Ersdal, Gerhard

(2020)

Crack Arresting With Crack Deflecting Holes in Steel Plates.

ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering ;

2020-08-03 - 2020-08-07.

Moan, Torgeir; Amdahl, Jørgen; Ersdal, Gerhard

(2016)

Assessment of ship impact risk to offshore structures - new NORSOK N-003 guidelines.

The 3rd Offshore Structural Reliability Conference OSRC2016;

2016-09-14 - 2016-09-16.

Ersdal, Gerhard; Haleem, Hesham; Ratnayake, R.M. Chandima

(2015)

Panel Discussion: Extending the Life of Aging Assets in the North Sea and Around the Globe.

Asset Integrity Management Stavanger;

2015-02-11 - 2015-02-12.

Ersdal, Gerhard; Sharp, John; Galbraith, David

(2014)

LESSONS LEARNED FROM AUDITING STRUCTURAL INTEGRITY MANAGEMENT.

OMAE2014;

2014-06-08 - 2014-06-13.

Ersdal, Gerhard; Sharp, John; Galbraith, David

(2014)

Ageing accidents – suggestion for a definition and examples from damaged platforms.

OMAE 2014;

2014-06-08 - 2014-06-13.

Ersdal, Gerhard; Kübler, Oliver; Faber, Michael H; Sørensen, John Dalsgaard; Haver, Sverre; Langen, Ivar

(2004)

Economic Optimal Reserve Strength for a Jacket Structure.

ASRANet International Colloquium;

2004-07-05 - 2004-07-07.

Ersdal, Gerhard; Sørensen, John Dalsgaard; Langen, Ivar

(2003)

Updating of structural failure probability based on experienced wave loading.

The Thirteenth (2003) International Offshore and Polar Engineering Conference;

2003-05-25 - 2003-05-30.

Ersdal, Gerhard; Langen, Ivar

(2002)

On Assessment of Existing Offshore Structures.

The Twelfth (2002) International Offshore and Polar Engineering Conference;

2002-05-26 - 2002-05-31.