防灾减灾工程学报2024，Vol.44Issue(6)：1386-1397,12.DOI:10.13409/j.cnki.jdpme.20231013005
逆断层作用下局部腐蚀埋地管道的失效模式研究
Effect of Local Corrosion on Failure Mode of Buried Pipeline Under Reverse Fault
摘要
Abstract
Under the action of faults,the failure of pipelines with corrosion defects mainly occurs in weak parts of pipeline structure,such as corrosion areas.To explore the impact of corrosion-defect pipelines on the failure mode during fault displacement,a three-dimensional model of corrosion-defect pipelines crossing a reverse fault was established based on elastic-plastic finite element theory.On this basis,parameters such as corrosion position,corrosion depth,and fault dislocation were explored re-garding their influence on local corrosion areas,pipe stress-strain distribution,and failure modes under the action of the reverse fault.The results showed that the main failure mode of the pipeline during fault displacement was local buckling damage at the top of the downthrown segment and the bottom of the upheld segment,with the bottom of the downthrown segment and the top of the upheld segment in tension.When the top of the upheld pipe segment was locally corroded,the main failure mode of the pipeline was a dual failure mode of tensile failure at the top of the upheld segment and local buckling failure at the bottom.When the top of the downthrown pipe segment was locally corroded,the main failure mode remained buckling failure,but the pipeline experienced buckling failure at a smaller fault dislocation.Different corrosion locations significantly affected the stress distribution of the corroded pipeline.Corrosion at the top of the downthrown pipe segment had a greater impact on the degradation of the pipeline's seismic performance compared to corrosion at the top of the upheld pipe segment,which in turn influenced the changes in the failure mode of the upheld pipe segment.As corrosion deep-ened,the strain caused by local corrosion at the top of the upheld pipe segment followed a nearly lin-ear growth trend,while the strain caused by corrosion at the bottom of the downthrown pipe segment followed a nonlinear growth trend.关键词
埋地管道/失效模式/数值模拟/腐蚀缺陷/逆断层Key words
buried pipeline/failure mode/numerical simulation/corrosion defect/reverse fault分类
建筑与水利引用本文复制引用
韩俊艳,赵文乐,帅义,侯本伟,郭富强,杜修力..逆断层作用下局部腐蚀埋地管道的失效模式研究[J].防灾减灾工程学报,2024,44(6):1386-1397,12.基金项目
北京市自然科学基金(8212005)、国家重点研发项目(2022YFC3004300)、国家自然科学基金项目(52220105011)资助 （8212005）
