Earthquakes and Structures

  • 제26권4호
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  • Pages.261-267
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  • 2024
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Seismic behavior of deep-sea pipeline after global buckling under active control

  • Jianshuo Wang (Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin Chengjian University) ;
  • Tinghao Meng (Department of Civil Engineering, Tianjin Chengjian University) ;
  • Zechao Zhang (Science and Technology Research Institute of China Three Gorges Corporation) ;
  • Zhihua Chen (Department of Civil Engineering, Tianjin Chengjian University) ;
  • Hongbo Liu (Hebei Province Key Laboratory for Low-Carbon Construction and Resilience Enhancement of Construction Engineering, Hebei University of Engineering)
  • 투고 : 2023.07.31
  • 심사 : 2024.02.20
  • 발행 : 2024.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

With the increase in the exploitation depth of offshore oil and gas, it is possible to control the global buckling of deep-sea pipelines by the snake lay method. Previous studies mainly focused on the analysis of critical buckling force and critical temperature of pipelines under the snake-like laying method, and pipelines often suffer structural failure due to seismic disasters during operation. Therefore, seismic action is a necessary factor in the design and analysis of submarine pipelines. In this paper, the seismic action of steel pipes in the operation stage after global buckling has occurred under the active control method is analyzed. Firstly, we have established a simplified finite element model for the entire process cycle and found that this modeling method is accurate and efficient, solving the problem of difficult convergence of seismic wave and soil coupling in previous solid analysis, and improving the efficiency of calculations. Secondly, through parameter analysis, it was found that under seismic action, the pipe diameter mainly affects the stress amplitude of the pipeline. When the pipe wall thickness increases from 0.05 m to 0.09 m, the critical buckling force increases by 150%, and the maximum axial stress decreases by 56%. In the pipe soil interaction, the greater the soil viscosity, the greater the pipe soil interaction force, the greater the soil constraint on the pipeline, and the safer the pipeline. Finally, the pipeline failure determination formula was obtained through dimensionless analysis and verified, and it was found that the formula was accurate.

키워드

과제정보

The research described in this paper was financially supported by the Tianjin Special Project for Technical Innovation Guidance (Fund) Enterprise Science and Technology Commissioner Project (23YDTPJC00140) of China.

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