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Buckling response of pipe-in-pipe systems subjected to bending

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Abstract

The buckling response of pipe-in-pipe(PIP)systems subjected to bending is investigated in this paper. A set of parameterized models are established to explore the bending characteristics of the PIP systems through eigenvalue buckling analysis and nonlinear post-buckling analysis. The results show that the length of PIP systems and the height of centralizers are the most significant factors that influence the buckling moment, ultimate bending moment and buckling mode; the other geometric characteristics, such as initial geometric imperfection and friction between centralizers and outer pipes, evidently influence the post-buckling path and ductility of PIPs; the equivalent bending stiffness is dependent on the length and centralizers. Moreover, the range of equivalent bending stiffness is also discussed.

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Authors and Affiliations

  1. School of Civil Engineering, Tianjin University, Tianjin, 300072, China

    Zhe Wang  (王 哲), Zhihua Chen  (陈志华), Hongbo Liu  (刘红波) & Yongyu He  (何永禹)

  2. Key Laboratory of Coast Civil Structure Safety, Ministry of Education(Tianjin University), Tianjin, 300072, China

    Zhihua Chen  (陈志华)

  3. Research Center of Spatial Structures, Guizhou University, Guiyang, 550025, China

    Kejian Ma  (马克俭)

Authors
  1. Zhe Wang  (王 哲)
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  2. Zhihua Chen  (陈志华)
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  3. Hongbo Liu  (刘红波)
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  4. Yongyu He  (何永禹)
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  5. Kejian Ma  (马克俭)
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Corresponding author

Correspondence to Zhihua Chen  (陈志华).

Additional information

Supported by the National Basic Research Program of China (“973” Program, No. 2014CB046801).

Wang Zhe, born in 1988, male, doctorate student.

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Wang, Z., Chen, Z., Liu, H. et al. Buckling response of pipe-in-pipe systems subjected to bending. Trans. Tianjin Univ. 21, 492–500 (2015). https://doi.org/10.1007/s12209-015-2543-4

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  • DOI: https://doi.org/10.1007/s12209-015-2543-4

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