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为丰富对活动断层作用下海底管道的受力特性认识,考虑管土材料非线性与几何非线性特征,采用通用有限元软件ABAQUS严格模拟管土之间的相互作用;按照应变控制准则,结合管道屈曲破坏、极限拉伸破裂等的破坏形式,系统分析了海底走滑断层作用下管道在不同设计参数情况下的位移、应力应变分布情况,得到了不同条件下管道发生破坏时的极限断层位移。最后基于分析结果提出了适用于海底管线设计和运营的一些建议。
In order to enrich understanding of the stress characteristics of submarine pipelines under active faults and to consider the nonlinear and geometrical nonlinear characteristics of pipe and soil materials, the common finite element software ABAQUS was used to strictly simulate the interaction between pipe and soil. According to the strain control criterion, Buckling failure, ultimate tensile failure and so on, the displacement, stress and strain distribution of the pipeline under different design parameters are systematically analyzed and the ultimate fault displacement under different conditions is obtained. Finally, some suggestions for the design and operation of submarine pipeline are put forward based on the analysis results.