Current Research

Representative publications

[1] 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

[2] Chatzopoulou, G., Karamanos, S. A., “Low-cycle fatigue of base-plate-to-shell connection in uplifting liquid storage tanks under seismic loading”, Pressure Vessel and Piping Conference, ASME, PVP2019-93419, San Antonio, Texas, USA, July 2019.DOI

[3] 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

[4] 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

[5] 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

[6] Chatziioannou, K., Karamanos, S. A., Huang, Y., “Coupled Numerical Simulation of Low-Cycle Fatigue Damage in Metal Components”, Engineering Structures, Vol. 229, Article 111536 February 2021. DOI

[7] 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

[8] 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 

 

Representative publications

[1]  McPherson, D. L., Duffy, M., Koritsa, E., Karamanos, S. A. and Plattsmier, J. R., “Improving the performance of steel pipe welded-lap joints in geohazard areas”, ASCE Pipelines Conference Paper No. 183, Kansas City, MO, July 2016. DOI

[2]  Keil, B. D., Gobler, F., Mielke, R. D., Lucier, G., Sarvanis, G. C., Karamanos, S. A., “Experimental Results of Steel Lap Welded Pipe Joints in Seismic Conditions.”, ASCE Pipelines Conference, paper No. 386906, Toronto, ON, Canada, July 2018. DOI

[3]  Chatzopoulou, G., Fappas, D., Karamanos, S. A., Keil, B. D. and Mielke, R. D., “Numerical Simulation of Steel Lap Welded Pipe Joint Behavior in Seismic Conditions.”, ASCE Pipelines Conference, paper No. 387141, Toronto, ON, Canada, July 2018. DOI

[4]  Card, R. J., Karamanos, S. A., Sarvanis, G., Chatzopoulou, G., “Joint Strength or “Efficiency” Factors of Steel Lap Welded Joints for Use in Water Conveyance”, ASCE Pipelines Conference, paper No. 535636, Nashville, TN, USA, July 2019. DOI

[5]  Keil, B. D., Lucier, G., Karamanos, S. A., Mielke, R. D., Gobler, F., Fappas, D., Sarvanis, G. C., Chatzopoulou, G., Card, R. J., “Experimental Investigation of Steel Lap Welded Pipe Joint Performance Under Severe Axial Loading Conditions in Seismic or Geohazard Areas”, ASCE Pipelines Conference, paper No. 744005, San Antonio, TX, USA, August 2020.

[6]  Keil, B. D., Mielke, R. D., Gobler, F., Lucier, G., Sarvanis, G. C., Chatzopoulou, G., Fappas, D., Karamanos, S. A., “Newly Developed Seismic Resilient Steel Pipe Joint Safeguards Pipeline Structural Integrity during Severe Geohazard Events”, ASCE Pipelines Conference, paper No. 744041, San Antonio, TX, USA, August 2020.

[7]  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

Representative publications

[1]  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

[2]  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

[3]  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

[4]  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

[5]  Antoniou, K., Chatzopoulou, G., Karamanos, S. A., Tazedakis, A., Palagas, C., Dourdounis, E., “Simulation of JCO-E Line Pipe Fabrication Process”, 15th Pipeline Technology Conference, Berlin, March 2020.

[6]  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

[7]  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

Representative publications

[1]   Varelis, G. E., Karamanos, S. A., and Gresnigt, A. M., “Pipe Elbows Under Strong Cyclic Loading.”, Journal of Pressure Vessel Technology, ASME, Vol.135, No.1, Article Number: 011207, February 2013. DOI

[2]   Varelis, G. E., and Karamanos, S. A., “Buckling of High-Strength Steel Cylinders Under Cyclic Bending in the Inelastic Range.”, Journal of Pressure Vessel Technology, ASME, Vol. 136, Article Number: 021207, April 2014. DOI

[3]   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

[4]   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

[5]   Chatziioannou, K., Huang Y. and Karamanos S. A., “Simulation of piping ratcheting experiments using advanced plane-stress cyclic elastoplasticity models”, Pressure Vessel and Piping Conference, ASME, PVP2019-93507, San Antonio, Texas, USA, July 2019. DOI

[6]   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

[7]   Chatziioannou, K., Karamanos, S. A., Huang, Y., “An Implicit Numerical Scheme for Cyclic Elastoplasticity and Ratcheting under Plane Stress Conditions”, Computers & Structures, Vol. 249, Article 106509, June 2021. DOI

Representative publications

[1]   Vasilikis, D. and Karamanos, S. A., “Mechanical Behavior and Wrinkling of Lined Pipes.”, International Journal of Solids and Structures, Vol. 49, No. 23-24, pp. 3432-3446, November 2012. DOI

[2]   Vasilikis, D. and Karamanos, S. A., “Wrinkling of Lined Steel Pipes Under Bending.”, Offshore Mechanics and Arctic Engineering Conference, ASME, OMAE2013-11122, Nantes, France, June 2013. DOI

[3]   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

[4]   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

[5]   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

[6]   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

Representative publications

[1]   Pappa, P. and Karamanos, S. A., "Non-Associative J2 Plasticity Model for Finite Element Buckling Analysis of Shells in the Inelastic Range", Computer Methods in Applied Mechanics and Engineering, Vol. 300, pp. 689–715, March 2016. DOI

[2]   Nasikas, A., Karamanos, S. A., Papanicolopulos, S. A., “A framework for formulating and implementing non-associative plasticity models for shell buckling computations”, International Journal of Solids and Structures, Vol. 257, article 111508, Special Issue to honor Prof. Stelios Kyriakides, December 2022. DOI

Representative publications

[1] Vazouras, P., Karamanos, S. A.and Dakoulas, P., “Finite Element Analysis of Buried Steel Pipelines Under Strike-Slip Fault Displacements”, Soil Dynamics and Earthquake Engineering, Vol. 30, No. 11, pp. 1361–1376, November 2010. DOI

[2] Vazouras, P., Karamanos, S. A. and Dakoulas, P., “Mechanical behavior of buried steel pipes crossing active strike-slip faults”, Soil Dynamics and Earthquake Engineering, Vol. 41,pp. 164-180, October 2012. DOI

[3] 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

[4] Ferino, J., Fonzo, A., Di Biagio, M., Demofonti, G. Spinelli, C. M., 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

[5] 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

[6] 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

[7] 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

[8] 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

[9] 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

[10] Karamanos, S. A., Gresnigt, A. M. and Dijkstra, G. J. (Eds.), Geohazards and Pipelines, State-of-the-art design using experimental, numerical and analytical methodologies, Springer Nature, Cham, Switzerland, 175 pages, to be published 2020. DOI

[11] Sarvanis, G. C., Karamanos, S. A., Keil, B. D., Mielke, R. D., “Strain-based design of a large-diameter steel water pipeline crossing ground settlement areas”, ASCE Pipelines Conference, paper No. 932671 (virtual on-line conference), August 2021. DOI

[12] Vazouras, P., Keil, B. D., Dakoulas, P., Mielke, R. D., Karamanos, S. A., “A novel system for assuring the performance of steel water pipelines in ground settlement areas”, ASCE Pipelines Conference, paper No. 71, Indianapolis, IN, USA, August 2022. DOI

[13] Mielke, R. D., Keil, B. D., Cornwell, E., Davidenko, G., P.E., Karamanos, S. A., “Long Term Soil Settlement of 36” Requires Innovative Design and Construction of Critical 96”and 84” Steel Water Pipeline in Houston TX”, ASCE Pipelines Conference, San Antonio, Texas, USA, August 2023. DOI

[14] Keil, B. D., Vazouras, P., Mielke, R. D., Karamanos, S. A., “How to accommodate differential settlement using Geohazard Resistant Steel Pipe (GRSP)”, ASCE Pipelines Conference, paper No. 118, Calgary, AL, Canada, July 2024. DOI

[15] Karamanos, S. A., Keil, B. D., Card, R. J., “Buried Steel Water Pipelines in Geohazard Areas – A Basis for Design”, ASCE Pipelines Conference, paper No. 181, Calgary, AL, Canada, July 2024. DOI

[16] Vazouras, P., Keil, B. D., Mielke, R. D., Karamanos, S. A., “How to Design Geohazard Resistant Steel Pipe in Critical Fault Crossing Areas”, ASCE Pipelines Conference, paper No. 245, Tampa, FL, USA, August 2025. DOI

 

Representative publications

[1]   Labbé, P., Reddy, G. R., Mathon, C., Moreau, F., Karamanos, S. A., “The OECD-NEA Programme on Metallic Component Margins Under High Seismic Loads (MECOS)”, Pressure Vessel and Piping Conference, ASME, PVP2016-63119, Vancouver, Canada, July 2016. DOI

[2]   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

[3]   Vathi, M., Karamanos, S. A., Kapogiannis, I. A. and Spiliopoulos, K. V., “Performance criteria for liquid storage tanks and piping systems subjected to seismic loading.”, Journal of Pressure Vessel Technology, ASME, Vol. 139, Article Number: 051801, October, 2017. DOI

[4]   Vathi, M. and Karamanos, S. A., “A Simple and Efficient Model for Seismic Response and Low-Cycle Fatigue Assessment of Uplifting Liquid Storage Tanks.”, Journal of Loss Prevention in the Process Industries, Vol. 53, pp. 29-44, May 2018. DOI

[5]   Bakalis, K. and Karamanos, S. A., “Uplift Mechanics of Unanchored Liquid Storage Tanks Subjected to Lateral Earthquake Loading”, Thin-Walled Structures, Vol. 158, Article 107145, January 2021. DOI