Mechanical properties of the liner for strengthening steel pipe under the action of normal fault

IF 4.8 Q2 ENERGY & FUELS
Kejie Zhai , Deqiang Hu , Kaidong Wang , Hongyuan Fang , Niannian Wang , Bin Li , Xueming Du , Yuquan Hu , Xiangqian Fan
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引用次数: 0

Abstract

Using liner pipe to rehabilitate pressure pipe can effectively improve the mechanical performance of the pipe. To explore the mechanical properties of the liner for repairing pressure pipes under the action of a normal fault, a refined three-dimensional (3D) finite element (FE) model is established and assessed by experiments and FE results. Then, the stress distribution of the liner is analyzed, and the effects of fault slip distance, slip angle, pipe diameter, host thickness, internal pressure, liner elastic modulus, and friction factor on the liner stress and vertical displacement are studied. Finally, the bearing capacity of the pipeline against normal faults is analyzed. The study shows that the distribution morphology of the crown and shoulder is similar and opposite to the distribution morphology of the invert and haunch. The crown and invert stress of the pipe is the highest, while the stress on the springline is the lowest. When the host pipe thicknesses are 3.0 mm, 3.5 mm, 4.0 mm, and 5.0 mm, the slip distance reaches 309 mm, 342 mm, 370 mm, and 449 mm, respectively, and the liner will damage at the crown.
正断层作用下钢管强化衬板的力学性能
采用衬管对压力管道进行修复,可以有效地提高管道的力学性能。为了研究正断层作用下压力管道修补衬板的力学性能,建立了精细的三维有限元模型,并通过实验和有限元结果对其进行了评价。然后,分析了尾管的应力分布,研究了断层滑移距离、滑移角、管径、承载体厚度、内压、尾管弹性模量和摩擦系数对尾管应力和垂直位移的影响。最后,对管道正常故障的承载能力进行了分析。研究表明,冠部和肩部的分布形态与背部和臀部的分布形态相似而相反。管道的顶应力和倒应力最大,而弹簧线上的应力最小。当管材厚度分别为3.0 mm、3.5 mm、4.0 mm和5.0 mm时,滑移距离分别为309 mm、342 mm、370 mm和449 mm,尾管在顶部发生损伤。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
7.50
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