Structural Mechanics Group

Structural Mechanics for Pipes and Pipelines

Steel pipelines and piping components, used in numerous engineering applications, are often subjected to severe loading conditions (monotonic or cyclic) associated with inelastic deformations, which may threat their structural integrity.

Finite element analysis of a pipeline crossing a geohazard area; the differential ground motion induces significant strain and deformation to the pipeline.

Simulation of the structural response of a mechanically-lined pipe subjected to bending; liner has wrinkled because of excessive compressive strain.

Special issues

• Seismic analysis and design of steel water pipelines (cooperation with Northwest Pipe Company)
• Mechanical behavior of lap welded joints (cooperation with Northwest Pipe Company)
• Effect of line pipe fabrication process on the mechanical behavior of pipelines (cooperation with Corinth Pipeworks S.A.)
• Structural behavior of mechanically-lined (bi-material) steel pipes
• Seismic response of industrial piping components
• Ratcheting and low-cycle fatigue of welded pipe components, using experimental and numerical simulation (coupled plasticity-damage models)

Recent research projects

• INDUSE (2009-2012) [final report],
• ULCF (2011-2014) [final report]
• GIPIPE (2011-2014) [final report],
• SBD-SPIPE (2013-2016) [final report]
• INDUSE-2-SAFETY (2014-2017) [final report]

Link

MECOS benchmark

Link

Infrashield® system (Northwest Pipe Co.)

Relevant books

[B1] Karamanos, S. A., Gresnigt, A. M., Dijkstra, G. J., Geohazards and Pipelines, State-of-the-art design using experimental, numerical and analytical methodologies, Springer Nature, Cham, Switzerland, 208 pages, 2021, book website (ISBN: 978-3-030-49892-4)

[B2] Karamanos, S. A., Structural Mechanics and Design of Metal Pipes, Elsevier, Amsterdam, Netherlands, 512 pages, 2023, book website (ISBN: 9780323886635)

Relevant recent publications (last 5 years)

[P1] Varelis, G. E. and Karamanos, S. A., “Low-Cycle Fatigue of Pressurized Steel Elbows Under In-Plane Bending.”, Journal of Pressure Vessel Technology, ASME, Vol.137, No.1, Article Number: 011401, February 2015. DOI

[P2] Vazouras, P., Dakoulas, P. and Karamanos, S. A., “Pipe-Soil Interaction and Pipeline Performance Under Strike-Slip Fault Movements.”,Soil Dynamics and Earthquake Engineering, Vol. 72, pp. 48–65, May 2015. DOI

[P3] Ferino, J., Fonzo, A., Di Biagio, M., Demofonti, G., Spinelli, C. M. and Karamanos S. A., “Onshore pipeline high grade steel for challenge utilization.”, International Journal of Offshore and Polar Engineering, ISOPE, Vol. 25, No. 4, pp. 272–280, December 2015. PDF

[P4] Chatzopoulou, G., Karamanos, S. A. and Varelis, G. E., “Finite Element Analysis of UOE Manufacturing Process and its Effect on Mechanical Behavior of Offshore Pipes.”, International Journal of Solids and Structures, Vol. 83, pp. 13-27,April 2016.DOI

[P5] Van Es, S. H. J., Gresnigt, A. M., Vasilikis, D. and Karamanos, S. A., “Ultimate Bending Capacity of Spiral-Welded Steel Tubes - Part I: Experiments”, Thin-Walled Structures, Vol. 102, pp. 286-304, May 2016. DOI

[P6] Vasilikis, D., Karamanos, S. A., Van Es, S. H. J. and Gresnigt, A. M., “Ultimate Bending Capacity of Spiral-Welded Steel Tubes - Part II: Predictions”, Thin-Walled Structures, Vol. 102,pp. 305-319, May 2016. DOI

[P7] Karamanos, S. A., “Mechanical Behavior of Steel Pipe Bends; An Overview.”, Journal of Pressure Vessel Technology, ASME, Invited paper:special issue for the 50^th Anniversary of PVPD, Vol. 138, No. 4, Article Number: 041203, August 2016. DOI

[P8] Chatzopoulou, G., Karamanos, S. A. and Varelis, G. E., “Finite Element Analysis of Cyclically-Loaded Steel Pipes During Deep Water Reeling Installation.”, Ocean Engineering, Vol. 124, pp. 113–124, September 2016. DOI

[P9] Kaya, E. S., Uckan, E., O’Rourke, M. J., Karamanos, S. A., Akbas, B., Cakir, F., Cheng, Y., “Failure Analysis of a Welded Steel Pipe at Kullar Fault Crossing”, Engineering Failure Analysis, Vol. 71, pp. 43-62, January 2017. DOI

[P10] Skarakis, I., Chatzopoulou, G., Karamanos, S. A., Tsouvalis, N. G. and Pournara, A. E., “CFRP Reinforcement and Repair of Steel Pipe Elbows Subjected to Severe Cyclic Loading”, Journal of Pressure Vessel Technology, ASME, Vol. 139, Article Number: 051403, October 2017. DOI

[P11] Karamanos, S. A., Sarvanis, G. C., Keil, B. and Card, R. J., “Analysis and Design of Buried Steel Water Pipelines in Seismic Areas.”, Journal of Pipeline Systems, Engineering & Practice, ASCE, Vol. 8, No. 4, Article Number: 04017018, November 2017. DOI

[P12] Vazouras, P. and Karamanos, S. A., “Structural Behavior of Buried Pipe Bends and Their Effect on Pipeline Response in Fault Crossing Areas”, Bulletin of Earthquake Engineering, Vol. 15, No. 11, pp. 4999-5024, November 2017. DOI

[P13] Sarvanis, G. C., and Karamanos, S. A., “Analytical Model for the Strain Analysis of Continuous Buried Pipelines in Geohazard Areas.”, Engineering Structures, Vol. 152, pp. 57-69, December 2017. DOI

[P14]   Sarvanis, G. C., Karamanos, S. A., Vazouras, P., Mecozzi, E., Lucci, A., Dakoulas, P., "Permanent Earthquake-Induced Actions in Buried Pipelines: Numerical Modeling and Experimental Verification", Earthquake Engineering and Structural Dynamics, Vol. 47, No. 4, pp. 966–987, April 2018. DOI

[P15]   Papadaki, C. I., Karamanos, S. A., Chatzopoulou, G. and Sarvanis, G. C., “Buckling of Internally-Pressurized Spiral-Welded Steel Pipes under Bending.”, International Journal of Pressure Vessels and Piping, Vol. 165, Pages 270-285, August 2018. DOI

[P16]   Gavriilidis, I. and Karamanos, S. A., “Bending and buckling of internally-pressurized steel lined pipes”, Ocean Engineering, Vol. 171, pp. 540–553, January 2019. DOI

[P17]   Pournara, A. E., Papatheocharis, T., Karamanos, S. A. and Perdikaris, P. C., “Mechanical Behavior of Dented Steel Pipes Subjected to Bending and Pressure Loading.”, Journal of Offshore Mechanics and Arctic Engineering, ASME, Vol. 141, No. 1, Article Number: 011702, February 2019. DOI

[P18]   Antoniou, K., Chatzopoulou, G., Karamanos, S. A., Tazedakis, A., Palagas, C., Dourdounis, E., “Numerical Simulation of JCO-E Pipe Manufacturing Process and its Effect on the External Pressure Capacity of the Pipe.”, Journal of Offshore Mechanics and Arctic Engineering, ASME, Vol. 141, No. 1, Article Number: 011704, February 2019. DOI

[P19]   Chatzopoulou, G., Sarvanis, G. C., Karamanos, S. A., Mecozzi, E., Hilgert, O., “The effect of spiral cold-bending manufacturing process on pipeline mechanical behavior”, International Journal of Solids and Structures, Vol. 166, pp. 167-182, July 2019. DOI

[P20]   Gavriilidis, I. and Karamanos, S. A., “Effect of manufacturing process on lined pipe bending response”, Journal of Offshore Mechanics and Arctic Engineering, ASME, Vol. 142, No. 5, Article number: 051801, October 2020. DOI

[P21]Sarvanis, G. C., Chatzopoulou, G., Fappas, D., Karamanos, S. A., Keil, B. D., Lucier, G., Gobler, F., Mielke, R. D., “Bending Response of Lap Welded Steel Pipeline Joints”, Thin-Walled Structures, Vol. 157, Article 107065, December 2020. DOI

[P22] Chatzopoulou, G. and Karamanos, S. A., “Numerical Simulation of the Mechanical Behaviour of Steel Pipe Bends Under Strong Cyclic Loading”, International Journal of Pressure Vessels & Piping, Vol. 188, Article 104239, December 2020. DOI

[P23] Chatzopoulou, G. and Karamanos, S. A., “Numerical Implementation of Bounding-Surface Model for Simulating Cyclic Inelastic Response of Metal Piping Components”, Finite Elements in Analysis & Design, Vol. 185, Article 103493, March 2021.DOI

[P24] Chatziioannou, K., Huang, Y., Karamanos, S. A., “Simulation of Cyclic Loading on Pipe Elbows using Advanced Plane-Stress Elasto-plasticity Models”, Journal of Pressure Vessel Technology, ASME, Vol. 143, Article 021501, April 2021.DOI

[P25] Gavriilidis, I. and Karamanos, S. A., “Liner wrinkling in offshore steel lined pipes during reeling installation”, Thin-Walled Structures, Vol. 166, Article 108114, September 2021.DOI

[P26] Gavriilidis, I. and Karamanos, S. A., “Structural response of steel lined pipes under cyclic bending”, International Journal of Solids and Structures, Vol. 234-235, Article 111245, January 2022.DOI

[P27] Keil, B. D., Fappas, D., Gobler, F., Sarvanis, G. C., Chatzopoulou, G., Lucier, G., Mielke, R. D., Karamanos, S. A., “A New Concept for Improving the Structural Resilience of Lap-Welded Steel Pipeline Joints”, Thin-Walled Structures, Vol. 171, article 108676, February 2022.DOI

[P28] Antoniou, K., Stamou, A. G., Karamanos, S. A., Palagas, C., Tazedakis, A., Dourdounis, E., “Finite element modeling of the JCO-E line pipe fabrication process; material properties and collapse pressure prediction”, Thin-Walled Structures, Vol. 192, article 111120, November 2023. DOI

[P29] Karvelas, C. G., Chatzopoulou, G., Zervaki, A. D., Karamanos, S. A., Strepelias, E., Palios, X., Bousias, S. N., “Mechanical Response of an Industrial Piping System Under Strong Cyclic Loading”, Journal of Pressure Vessel Technology, ASME, Vol. 145, No. 6, article 061502, December 2023. DOI

[P30] Gavriilidis, I., Stamou, A. G., Palagas, C., Dourdounis, E., Voudouris, N., Tazedakis, A., Karamanos, S. A., “Heat treatment effects on collapse of JCO-E steel pipes under external pressure: experiments and numerical predictions”, Marine Structures, Vol. 93, article 103536, January 2024. DOI