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[1]刘啸奔 余佳莹 付孟楷 陈朋超 张宏.基于等效弯曲刚度的断层作用下埋地油气管道应变解析法[J].油气储运,2025,44(08):1-10.
LIU Xiaoben,YU Jiaying,FU Mengkai,et al.An improved analytical strain analysis method for buried oil & gas pipelines subjected to fault displacement based on the equivalent bending stiffness model[J].Oil & Gas Storage and Transportation,2025,44(08):1-10.
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LIU Xiaoben,YU Jiaying,FU Mengkai,et al.An improved analytical strain analysis method for buried oil & gas pipelines subjected to fault displacement based on the equivalent bending stiffness model[J].Oil & Gas Storage and Transportation,2025,44(08):1-10.
基于等效弯曲刚度的断层作用下埋地油气管道应变解析法
《油气储运》[ISSN:1000-8241/CN:13-1093/TE]
卷:
44
期数:
2025年08期
页码:
1-10
栏目:
出版日期:
2025-08-25
- Title:
- An improved analytical strain analysis method for buried oil & gas pipelines subjected to fault displacement based on the equivalent bending stiffness model
- Keywords:
-
buried oil and gas pipelines; fault displacement; nonlinear pipe-soil interaction; linear hardening material model; analytic method
- 分类号:
- TE88
- 文献标志码:
- A
- 摘要:
- 【目的】断层造成的永久地面位移易使埋地油气管道产生较大的弯曲与轴向变形，导致管道因受拉破裂或受压屈曲而发生失效。传统的解析方法在适用性、准确性方面存在不足，亟需构建更加精准、高效的解析法对断层区管道安全状态进行快速评估。【方法】提出了一种基于等效弯曲刚度的油气管道轴向应变解析法：采用线性强化本构模型模拟管材的非线性特性，并利用非线性土弹簧模型模拟土壤在管道轴向与侧向的非线性约束作用；基于管道轴向拉伸力与土壤非线性约束力，构建断层区管道大挠度变形条件下的管道挠曲线控制方程；考虑管道截面应力与管道整体轴向拉伸力、弯曲的内外力的平衡关系，新建了大挠度变形段管道弹塑性变形条件下等效弯曲刚度的迭代求解算法，实现了断层区管道截面弹塑性状态的准确求解。【结果】以某穿越断层区的X80管道为例，选取断层穿越角度15°～90°的工况，以非线性有限元方法计算结果为参考值，对比国际上3种主流解析法与新建解析法，验证新建解析法对于不同穿越角度诱发的管道拉伸与弯曲变形组合工况下的适用性：在不同组合载荷条件下，新建解析法均与有限元方法模拟结果基本一致，平均相对误差为10.32%、均方误差为6.7×10-3，且显著优于国际上常用的主流解析方法，可实现断层区埋地油气管道应变的快速、准确预测。【结论】新建解析法在计算效率、准确性方面具有显著优势，为穿越断层区的管道应变设计与评价提供了理论支撑，并可为油气管道抗震设计标准的修订提供参考。
- Abstract:
- The permanent ground displacement caused by faults will cause large bending and axial deformation of buried oil and gas pipelines, resulting in tensile fracture or compressive buckling failure of pipelines. It is difficult to accurately obtain the large strain behavior of pipeline caused by the nonlinearity of pipeline material and pipe soil by the traditional analytical method. Therefore, there is an urgent need for a more accurate and efficient analytical method in engineering design to quickly assess the pipeline design strain under fault displacement. An improved analytical method for axial strain of oil and gas pipelines based on equivalent bending stiffness is proposed. A novel analytical method for axial strain of oil and gas pipelines based on equivalent bending stiffness was proposed: the linear hardening constitutive model was used to simulate the nonlinear characteristics of the pipe, and the nonlinear soil spring model was used to simulate the nonlinear constraint of soil in the axial and lateral directions of the pipeline; based on the axial force of the pipeline and the nonlinear constraint force of the soil, the governing equation of the pipeline deflection curve under the condition of large deflection deformation of the pipeline in the fault zone was constructed; considering the equilibrium relationship between the cross-section stress of the pipeline and the overall axial force of the pipeline and the internal and external forces of the bending, an iterative algorithm for solving the equivalent bending stiffness under the condition of elastic-plastic deformation of the pipeline in the large deflection deformation section is established, which realizes the accurate solution of the elastic-plastic state of the pipeline section in the fault zone. Taking a X80 pipeline crossing the fault zone as an example, the working condition of the fault crossing angle of 15 ° ~ 90 ° was selected, and the calculation results of the nonlinear finite element method were used as the reference value. The applicability of the new analytical method to the combined working conditions of pipeline tensile and bending deformation induced by different crossing angles was verified by comparing the three mainstream analytical methods in the world and the new analytical method. Under different combined load conditions, the results of the new analytical method were basically consistent with the finite element method results. The average relative error was 10.32% and the mean square error was 6.7×10-3, which was significantly better than the mainstream analytical methods commonly used in the world. It can realize the rapid and accurate prediction of the strain of buried oil and gas pipelines in the fault zone. The new analytical method has significant advantages in computational efficiency and accuracy, which provides theoretical support for the strain design and evaluation of pipelines crossing fault zones, and provides a reference for the revision of relevant standards for seismic design of oil and gas pipelines.
相似文献/References:
[1]曾希 雷震 靳方倩 杜国锋.不同断层对埋地管道受力性能的影响[J].油气储运,2020,39(01):1.
ZENG Xi,LEI Zhen,JIN Fangqian,et al.Influence of different faults on stress performance of buried pipelines[J].Oil & Gas Storage and Transportation,2020,39(08):1.
[2]曾希 雷震 靳方倩 杜国锋.不同断层对埋地管道受力性能的影响[J].油气储运,2020,39(07):788.[doi:10.6047/j.issn.1000-8241.2020.07.010]
ZENG Xi,LEI Zhen,JIN Fangqian,et al.Influence of different faults on stress performance of buried pipelines[J].Oil & Gas Storage and Transportation,2020,39(08):788.[doi:10.6047/j.issn.1000-8241.2020.07.010]
[3]刘鹏,李玉星,张宇,等.典型地质灾害下埋地管道的应力计算[J].油气储运,2021,40(02):157.[doi:10.6047/j.issn.1000-8241.2021.02.006]
LIU Peng,LI Yuxing,ZHANG Yu,et al.Stress calculation of buried pipelines affected by typical geological hazards[J].Oil & Gas Storage and Transportation,2021,40(08):157.[doi:10.6047/j.issn.1000-8241.2021.02.006]
更新日期/Last Update:
2025-06-06