Offshore Renewable Structures

Offshore Renewable Structures

The research group develops computational and experimental methodologies for the structural analysis, integrity and assessment of offshore renewable energy systems and components, with emphasis on offshore wind structures.

structural design of REFOS steel platform

Structural design of REFOS steel platform

 fatigue testing welded steel components

Fatigue testing of welded steel components

Special issues of our research

  • Structural analysis and design optimization of floating structural systems for renewable energy exploitation
  • Effect of modern welding technology and post-weld treatment on the fatigue resistance of welded components
  • Use of high-strength steel in offshore structural systems, with yield stress of 500 MPa or higher
  • Low-cycle fatigue of welded components, using experimental and numerical simulation (based on coupled plasticity-damage models)
  • Cohesive Zone computational models for simulating fatigue crack propagation in metals and metal components

Recent research projects

Relevant recent publications (last 5 years)

[1]  Kourkoulis, R., Gelagoti, F., Georgiou, I., Karamanos, S. A., Gazetas, G., “On the Adequacy of Existing Foundation Schemes for Offshore Wind Turbines Subjected to Extreme Loading”, OMAE2017‑61525, International Conference on Ocean, Offshore and Arctic Engineering, ASME, Trondheim, Norway, June, 2017. DOI

[2]  Pournara, A. E., Karamanos, S. A., Mecozzi, E., Lucci, A., “Structural resistance of high-strength steel CHS members.”, Journal of Constructional Steel Research, Vol. 128, pp. 152–165, January 2017.DOI

[3]  Papatheocharis, T., Sarvanis, G. C., Perdikaris, P. C., Karamanos, S. A., “Fatigue of welded tubular X-joints in offshore wind platforms”, 38th International Conference on Ocean, Offshore and Arctic Engineering, ASME, OMAE2019-95812, Glasgow, Scotland, UK, June, 2019. DOI

[4]  Gelagoti, F., Kourkoulis, R., Georgiou, I., Karamanos, S. A., "Soil-Structure Interaction Effects in Offshore Wind Support Structures Under Seismic Loading", Journal of Offshore Mechanics and Arctic Engineering, ASME, Vol. 141, No. 6, Article number: 061903, December 2019. DOI

[5]  Chatziioannou, K., Karamanos, S. A., Huang, Y., “Ultra low-cycle fatigue performance of S420 and S700 steel welded tubular X-joints”, International Journal of Fatigue, Vol. 129, pp. 105221, December 2019. DOI

[6]  Varelis, G. E., Papatheocharis, T., Karamanos, S. A., Perdikaris, P. C., “Structural behavior and design of high-strength steel welded tubular connections under extreme loading”, Marine Structures, Vol. 71, pp. 102701, May 2020. DOI

[7] Chatzopoulou, G., Karamanos, S. A., Zervaki, A. D., “Low-cycle fatigue of fillet-welded steel plate connections”, Journal of Constructional Steel Research, Vol. 176 Article 106379, January 2021. DOI

[8] Papatheocharis, T., Sarvanis, G. C., Perdikaris, P. C., Karamanos, S. A., Zervaki, A., “Fatigue resistance of welded steel tubular X-joints”, Marine Structures, Vol. 74, Article 102809, November 2020. DOI

[9] Papatheocharis, T., Plakias, G. T., Zervaki, A. D., Perdikaris, P. C., Karamanos, S. A., “Ultimate Strength and Fatigue of Stiffened Welded Tubular Joints in Floating Energy Production Structures”, Engineering Structures, Vol. 297, article 116985, December 2023. DOI