Analytical solution for buried pipeline deformation induced by normal and reverse fault considering structural joint influence

IF 3.4 2区工程技术 Q2 ENGINEERING, GEOLOGICAL

International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-03-12 DOI:10.1002/nag.3724

Zhiguo Zhang, Jiawei Feng, Zhengguo Zhu, Qihua Zhao, Yutao Pan

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引用次数: 0

Abstract

Previous studies take less account of analytical solution analysis for buried pipeline under the action of active fault. Furthermore, current theoretical studies of fault-pipeline interactions generally treat the structure as continuous pipeline, with less attention given to the effect of joints. This paper provides an analytical method to estimate the deformation and internal force of jointed pipelines under normal and reverse fault. By introducing the simplified soil deformation model and error function, the soil greenfield deformation curves under the influence of normal and reverse fault are obtained. Considering the interaction between the pipeline structure and the disturbed soil, the two-parameter Pasternak foundation model is adopted to analyze the forces on pipeline infinitesimal elements. Then, the mechanical response of the jointed pipeline structure due to the fault additional load is solved by finite difference method. The accuracy of the presented analytical solution is verified by comparisons with observed data of model test and 3D numerical simulation results. Finally, the parametric analyses are performed to estimate the influence for the characteristics of the foundation, fault and joint, including subgrade shear stiffness, subgrade reaction coefficient, fault dip, joint rotational stiffness, joint spacing, and intersection of fault and pipeline.

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考虑结构连接影响的正向和反向断层诱发埋地管道变形的分析解决方案

以往的研究较少考虑活动断层作用下埋地管道的分析解决分析。此外，目前关于断层-管道相互作用的理论研究一般将结构视为连续管道，而较少关注接头的影响。本文提供了一种分析方法，用于估算正向和逆向断层作用下接头管道的变形和内力。通过引入简化的土壤变形模型和误差函数，得到了正向和逆向断层影响下的土壤绿地变形曲线。考虑到管道结构与扰动土体之间的相互作用，采用双参数帕斯捷尔纳克地基模型分析管道无穷小构件的受力情况。然后，采用有限差分法求解了接合管道结构在故障附加荷载作用下的力学响应。通过与模型试验观测数据和三维数值模拟结果的比较，验证了所提出的分析解决方案的准确性。最后，进行了参数分析，以估算地基、断层和接头特性的影响，包括地基剪切刚度、地基反作用系数、断层倾角、接头旋转刚度、接头间距以及断层与管道的交叉点。

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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来源期刊

International Journal for Numerical and Analytical Methods in Geomechanics 工程技术-材料科学：综合

CiteScore

6.40

自引率

12.50%

发文量

160

审稿时长

9 months

期刊介绍： The journal welcomes manuscripts that substantially contribute to the understanding of the complex mechanical behaviour of geomaterials (soils, rocks, concrete, ice, snow, and powders), through innovative experimental techniques, and/or through the development of novel numerical or hybrid experimental/numerical modelling concepts in geomechanics. Topics of interest include instabilities and localization, interface and surface phenomena, fracture and failure, multi-physics and other time-dependent phenomena, micromechanics and multi-scale methods, and inverse analysis and stochastic methods. Papers related to energy and environmental issues are particularly welcome. The illustration of the proposed methods and techniques to engineering problems is encouraged. However, manuscripts dealing with applications of existing methods, or proposing incremental improvements to existing methods – in particular marginal extensions of existing analytical solutions or numerical methods – will not be considered for review.