Numerical studies on residual strength of dented tension leg platforms under compressive load

  • Quang Thang Do Faculty of Transportation Engineering, Nha Trang University, 02 Nguyen Dinh Chieu street, Nha Trang city, Khanh Hoa province, Vietnam https://orcid.org/0000-0002-4232-9563
  • Van Nhu Huynh Faculty of Transportation Engineering, Nha Trang University, 02 Nguyen Dinh Chieu street, Nha Trang city, Khanh Hoa province, Vietnam
  • Dinh Tu Tran Faculty of Transportation Engineering, Nha Trang University, 02 Nguyen Dinh Chieu street, Nha Trang city, Khanh Hoa province, Vietnam

Abstract

This paper focuses on numerical investigations and derived formulation to evaluate the residual strength of tension leg platforms (TLPs) with the local denting damage under axial compression loading. The damage generation scenarios in this research are represented the collision accidents of offshore stiffened cylinders TLPs with supply ships or floating subjects. The finite element model is performed using a commercial software package ABAQUS, which has been validated against the experiments from the authors and other researchers. Case studies are then performed on design examples of LTPs when considering both intact and damaged conditions. Based on the rigorous numerical results, the new simple design formulations to predict residual strength of dented TLPs are derived through a regression study as the function of a non-dimensional dent depth. The accuracy and reliability of the derived formulation are validated by comparing it with the available test results in the literature. A good agreement with existing test data for ship-offshore structure collisions is achieved.

Keywords:

dented stringer-stiffened cylinder; residual strength; tension leg platforms (LTPs); axial compression; residual strength formulation.

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Published
19-08-2020
How to Cite
Do, Q. T., Huynh, V. N., & Tran, D. T. (2020). Numerical studies on residual strength of dented tension leg platforms under compressive load. Journal of Science and Technology in Civil Engineering (STCE) - NUCE, 14(3), 96-109. https://doi.org/10.31814/stce.nuce2020-14(3)-09
Section
Research Papers