Damage assessment of a buried CFRP petroleum pipeline subjected to blast loading

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (6) : 60-69.

CUI Ying1,2，ZHAO Junhai3，QU Zhan1,2，FANG Jun1,2

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Abstract

With buried explosion experiment, the anti-explosion performance of buried steel petroleum pipeline with Carbon Fibre Reinforced Polymer (CFRP) reinforcement was researched thoroughly. Furthermore, with the experimental data and numerical simulation, the damage assessment criterion of buried steel petroleum pipeline with CFRP reinforcement was established. The results show that under the condition of scale distance of 0.19m/kg1/3 and shallow buried blast loading exerted on, there were obvious dent deformations on the surface facing the explosive of the normal buried pipeline and the CFRP buried pipeline both, and the dent deformation values of the CFRP pipeline decreased 38.2% compared with the normal buried pipeline. And, it was venerable to have damage on the buried pipeline surface facing explosive and joint ends of the two specimens. As to the overpressure of buried pipeline surface facing explosive, the values of the normal buried pipeline was higher than that of the CFRP pipeline, which also proved that the CFRP sheets could decrease the value of overpressure of buried pipeline surface facing explosive effectively. As to the lasting time of positive pressure, it was similar between the normal buried pipeline and the CFRP buried pipeline, which also proved that the CFRP sheets had little effect on the lasting time of positive pressure of the two experimental specimens. Finally, considering the dent depth and dent length of the buried steel pipeline with CFRP reinforcement surface simultaneously, with the fixed end constraints, the damage assessment formula based on a new critical ratio between the dent depth and dent length was established according to pressure and impulse (P-I) damage assessment theory.

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explosion experiment / damage assessment / carbon fibre reinforced polymer (CFRP)pipeline / numerical simulation / pressure-impulse diagram

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CUI Ying1,2，ZHAO Junhai3，QU Zhan1,2，FANG Jun1,2. Damage assessment of a buried CFRP petroleum pipeline subjected to blast loading[J]. Journal of Vibration and Shock, 2022, 41(6): 60-69

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