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为研究断层错动对埋地管道的影响,采用有限元软件ABAQUS进行数值模拟,建立三维管土相互作用的非线性有限元模型,分析断层位移、管径、壁厚、断层及场地类型等参数对管道受力与变形的影响.研究结果表明,管道主要的破坏形态为受拉破坏;断层位移较大时,管道在逆断层作用下的应变反应要大于在正断层作用下的应变反应;场地类型对管道受力与变形有较大影响;增加管道的壁厚能够明显减小管道的拉伸应变峰值,有利于增强管道的抗力性能;断层位移较小时,采用小口径管道能够减轻管道破坏.
In order to study the influence of fault dislocation on buried pipelines, finite element software ABAQUS was used to perform numerical simulation. Three-dimensional nonlinear soil-soil interaction finite element model was established to analyze the parameters of fault displacement, pipe diameter, wall thickness, fault and site type On the stress and deformation of the pipeline.The results show that the main failure mode of the pipeline is tensile failure; when the fault displacement is large, the strain response of the pipeline under reverse fault is greater than the strain response under the normal fault; The type of pipe has a great influence on the stress and deformation of the pipe. Increasing the wall thickness of the pipe can obviously reduce the tensile strain peak of the pipe, which is beneficial to enhance the resistance performance of the pipe. When the displacement of the pipe is small, the use of small-diameter pipe can reduce the pipeline damage.