中文摘要：

基于应变的管道设计方法是利用位移控制思想实现管道的极限状态设计，是管道设计的发展方向。考虑材料非线性和载荷非线性建立管-土耦合模型进行基于应变的管道设计，以设计应变作为可靠度评价指标，建立埋地管道可靠度评价分析模型，通过对不同断层参数和管道参数的分析，得出定量的管道可靠度结果。结果表明:管道的轴向最大拉伸应变和轴向最大压缩应变随断层错距与土壤内摩擦角增大而增加;壁厚、径厚比、埋深对跨断层埋地管道极限应变状态影响很大，参数敏感性最大的是径厚比;敏感性分析的结果可以作为埋地管道完整性评价模型的状态变量。研究结果可为跨断层埋地管道完整性评价及管道安全测试方法提供思路参考。

英文摘要：

Strain analysis method for pipeline is a lim it state design way base on displacementcontrol theory which can be the new direction of pipeline design. Taking designed strain asreliability evaluation index and considering the material nonlinearity and load nonlinearity anddifferent parameters of the fault and pipe, pipe-soil coupling model based on strained pipelinedesign is established and quantitative reliability result of pipeline is proposed. The result shows:The maximum axial tensile strain and compressive strain rises as the staggered distance andinternal friction angle of soil grows; Wall thickness, radius to thickness ratio and buried depth ofthe pipe have great influence on the strain of buried pipeline at crossing-fault and the radius tothickness ratio has the greatest parameter sensitivity; The results of sensitivity analysis can beused as the state variables of the integrity assessment of pipeline. The studying conclusions canprovide ideas and reference for the integrity assessment of crossing-fault buried pipeline.