1.北京工业大学城市与工程安全减灾教育部重点实验室,北京 100124
2.中国石油大学(北京) 安全与海洋工程学院,北京 102249
3.林州建筑职业技术学院,河南 安阳 450046
韩俊艳(1983—),女,副教授,硕导,博士。主要从事地下结构抗震方面的研究。E‑mail:junyanhan@bjut.edu.cn
帅义(1987—),男,副教授,硕导,博士。主要从事新能源输送管道安全保障新技术与装备方面的研究。E‑mail:yshuai@cup.edu.cn
收稿:2023-10-13,
修回:2024-01-12,
纸质出版:2024-12-15
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韩俊艳,赵文乐,帅义等.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(06):1386-1397.
HAN Junyan,ZHAO Wenle,SHUAI Yi,et al.Effect of Local Corrosion on Failure Mode of Buried Pipeline Under Reverse Fault[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(06):1386-1397.
韩俊艳,赵文乐,帅义等.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(06):1386-1397. DOI: 10.13409/j.cnki.jdpme.20231013005.
HAN Junyan,ZHAO Wenle,SHUAI Yi,et al.Effect of Local Corrosion on Failure Mode of Buried Pipeline Under Reverse Fault[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(06):1386-1397. DOI: 10.13409/j.cnki.jdpme.20231013005.
含腐蚀缺陷管道在断层作用下的失效往往发生在管道腐蚀区域等管道结构力学性能薄弱部位。为深入探讨含腐蚀缺陷管道在断层错动时对管道失效模式的影响,基于弹塑性有限元理论,建立含腐蚀缺陷管道横穿逆断层的三维模型。在此基础上探究了腐蚀位置、腐蚀深度及断层错动量等参数对逆断层作用下管道局部腐蚀区域、管体应力应变分布及其失效模式的影响。结果表明:断层错动时管道的主要失效模式表现为断层下盘管道顶部和断层上盘管道底部局部屈曲破坏,断层下盘管道底部和断层上盘管道顶部处于受拉状态;上盘管道顶部发生局部腐蚀,管道的主要失效模式表现为断层上盘管道顶部拉伸破坏和管道底部局部屈曲破坏控制的双失效模式;下盘管道顶部发生局部腐蚀,管道的主要失效模式仍为屈曲破坏失效,但在较小断层错动量下管道已发生屈曲破坏失效;不同腐蚀位置对腐蚀管道的应力分布影响显著,局部腐蚀缺陷导致的壁厚减薄削弱了管道抵抗变形的能力,断层下盘管道顶部腐蚀比上盘管道顶部腐蚀对管道抗震性能退化的影响更大,进而影响上盘管道失效模式的变化;随着腐蚀程度的加深,断层上盘管道局部腐蚀引起的应变呈近似线性增长的趋势,而断层下盘处腐蚀引起的应变呈非线性增长的趋势。
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 regarding 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 deepened
the strain caused by local corrosion at the top of the upheld pipe segment followed a nearly linear growth trend
while the strain caused by corrosion at the bottom of the downthrown pipe segment followed a nonlinear growth trend.
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