斜滑断层作用下埋地管道的力学性能试验研究  

Study on Mechanical Properties of Buried Pipelines Crossing Oblique Slip Fault

作　　者：田江平 张东山 雷震 刘晓锋 杜国锋[1] Tian Jiangping;Zhang Dongshan;Lei Zhen;Liu Xiaofeng;Du Guofeng(School of Urban Construction, Yangtze University;No.1 Engineering Co.,Ltd. of FHEC of CCCC;China Light Industry Wuhan Design & Engineering Co., Ltd.)

机构地区：[1]长江大学城市建设学院,湖北省荆州市434023 [2]中交一公局第一工程有限公司 [3]中国轻工业武汉设计工程有限责任公司

出　　处：《石油机械》2019年第9期123-131,共9页China Petroleum Machinery

基　　金：国家自然科学基金项目“基于分布式压电陶瓷传感器的长输管道动力响应监测与损伤识别研究”(51778064);湖北省自然科学基金(群体)项目“山地长输管道地震致灾机理与抗震设计方法研究”(2016CFA022);中国石油科技创新基金项目“跨断层油气长输管道抗震分析方法与抗冲击性能研究”(2016D-5007-0605)

摘　　要：为研究跨斜滑断层作用下埋地管道的破坏机理和力学性能,设计了土箱装置进行跨斜滑断层的模型试验,并利用有限元软件进行数值模拟,研究了不同错距下管道的应变分布特点及管道变形情况。试验结果表明:埋地管道在斜滑断层作用下,管道的变形呈反对称状,远离断层的管段应变值较小,且随着土体一起运动;管轴上最大拉应变和压应变出现在断层面附近,且都随着断层错移量的增加而增大;对于管径较小管道,当错移量较大时,容易发生塑性应力集中现象;埋深较大的管道,其峰值拉压应变都较大,更容易出现塑形变形;增加管道的壁厚可以明显减小管道应变及变形,可有效减轻管道破坏。数值模拟结果与试验值非常接近,验证了所建模型的合理性,研究结果可为相关跨斜滑断层管道力学性能分析奠定基础。To study the failure mechanism and mechanical behavior of buried pipelines under the action of the oblique slip fault,the model test is conducted using soil box device for oblique slip fault simulation. The numerical simulation is also carried out by using large-scale finite element software to study the strain distribution characteristics and the deformation of the pipeline at different fault displacement. The test results show that under the action of the oblique slip fault,the deformation of the pipeline is anti-symmetric. The pipe section far from the fault has a small strain value and moves with the soil. The maximum tensile strain and compressive strain on the pipe axis appear near the fault plane,and both increase with the increase of the fault displacement. For the pipeline with smaller diameter,plastic stress concentration is easy to occur when the amount of fault displacement is large. The pipeline with larger buried depth has larger peak tension and compression strain,and is more likely to lead to plastic deformation. Increasing the wall thickness of the pipeline can significantly reduce the pipeline strain and deformation,and can effectively reduce the damage. The numerical simulation results matches well with the experimental values,which verified the rationality of the model. The study results can lay a foundation for the analysis of the mechanical properties of pipelines crossing oblique slip fault.

关 键 词：埋地管道 斜滑断层 力学性能 应变分布 峰值应变 数值模拟 

分 类 号：TE973[石油与天然气工程—石油机械设备]