横向滑坡作用下埋地管道静力学与数值模拟对比分析
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TB121

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湖北省安全生产科技专项资金项目(XQDSJC18032)


Comparative Analysis of Statics and Numerical Simulation of Buried Pipeline under the Action of Transverse Landslide
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    摘要:

    长距离输油管道周围环境复杂,灾害频发,其中滑坡地质灾害对埋地管道的长期安全运行构成了极大威胁。因此,研究滑坡作用下埋地管道的力学特性就极为重要。该文基于Winkler弹性地基梁模型和滑坡推力横向分布模型,考虑温差、内压及推力等因素引起的当量轴力的作用,建立横向滑坡作用下埋地管道受力变形的简化力学模型,根据对称条件、边界条件及滑坡体内管道与滑坡体外管道的变形协调性条件,求解管道变形的弯曲微分方程,推导得到管道挠度、转角、弯矩以及剪力的计算表达式。采用该算法对工程案例进行安全性评价,并基于ABAQUS软件对管道受力进行数值模拟研究,两者分析方法结果基本一致。结果均表明:在横向滑坡作用下,滑坡边界处的管道应力最大,最易发生破坏,滑坡体中部的管道变形最大。

    Abstract:

    The surrounding environment of long-distance oil-transporting pipeline is complex and disasters occur frequently. Landslides pose a great threat to the long-term safe operation of buried steel pipelines. Therefore, it is extremely important to research the mechanical properties of buried steel pipelines. Based on transverse distribution model of Winkler Beam model of elastic foundation and landslide thrust while in the consideration of the function of equivalent axial force which is aroused by temperature difference, internal pressure and thrust factors, a simplified mechanical model of stress and deformation of buried pipeline under lateral landslide is built. According to symmetry conditions, boundary conditions, and deformation compatibility conditions of pipeline and landslide external pipeline in landslide, the differential equation of pipeline deformation and computational expressions of pipe deflection, angle, bending moment and shear force can be solved. The algorithm is used to evaluate the safety of the engineering case. Based on the ABAQUS software, the numerical simulation of the pipeline stress is carried out. The results of the two methods are basically the same. The results show that under the action of lateral landslide, the pipeline stress at the boundary of the landslide is the largest, the most likely to occur, and the deformation of the pipeline in the middle of the landslide is the largest.

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王荣有,张家铭,王聪. 横向滑坡作用下埋地管道静力学与数值模拟对比分析[J]. 科学技术与工程, 2021, 21(1): 326-333.
Wang Rongyou, Zhang Jiaming, Wang Cong. Comparative Analysis of Statics and Numerical Simulation of Buried Pipeline under the Action of Transverse Landslide[J]. Science Technology and Engineering,2021,21(1):326-333.

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  • 收稿日期:2019-11-19
  • 最后修改日期:2020-10-23
  • 录用日期:2020-03-25
  • 在线发布日期: 2021-02-04
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