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Fatigue performance of deepwater steel catenary riser considering nonlinear soil effect

Lookup NU author(s): Dr Do Kyun KimORCiD

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Abstract

The touch down zone (TDZ) and top connection point of the vessel are most critical part of fatigue damage in the steel catenary riser (SCR). In general, the linear soil model has been used to evaluate fatigue performance of SCRs because it gives conservative results in the TDZ. However, the conservative linear soil model shows the limitation to accommodate real behavior in the TDZ as water depth is increased. Therefore, the riser behavior on soft clay seabed is investigated using a nonlinear soil model through time domain approach in this study. The numerical analysis considering various important parameters of the nonlinear soil model such as shear strength at mudline, shear strength gradient and suction resistance force is conducted to check the adoptability and applicability of nonlinear soil model for SCR design.

Publication metadata

Author(s): Kim YT, Kim DK, Choi HS, Yu SY, Park KS

Publication type: Article

Publication status: Published

Journal: Structural Engineering and Mechanics

Year: 2017

Volume: 61

Issue: 6

Pages: 737-746

Print publication date: 25/03/2017

Online publication date: 25/03/2017

Acceptance date: 15/11/2016

ISSN (print): 1225-4568

ISSN (electronic): 1598-6217

Publisher: Techno-Press

URL: https://doi.org/10.12989/sem.2017.61.6.737

DOI: 10.12989/sem.2017.61.6.737

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