022X80钢管道穿越地震断层应变响应分析.pdf

X80 钢管道穿越地震断层应变响应分析 [董卫 张立松 闫相祯 杨秀娟] [中国石油大学（华东）油气CAE 技术研究中心] [山东青岛经济技术开发区长江西路66 号 邮编：266555] / [ 摘 要 ] 地震作用下的断层错动是造成埋地管道破坏的重要因素之一，因此研究埋地管道在地震断层作 用下的破坏机理一直是生命线工程的前沿课题。考虑埋地管道与土介质的相互作用，分析管道 作为薄壳结构的断层位错反应。管道模型简化为四节点薄壳单元结构，土介质简化为非线性弹 簧单元，建立地震断层作用下的 X80 钢壳-弹簧有限元模型。考虑管道与土体的材料非线性、 管道几何参数、埋深、断层类型、断层与管道交角等因素，利用 ANSYS 软件对 X80 钢管道 最大轴向压缩的进行分析。结果表明：X80 钢管道与断层的交角对管道轴向压缩应变存在较大 影响；倾角越大，越不容易屈曲；地震断层对管道的影响主要出现在断层两侧，远离断层面的 单元应变急剧下降。 [ 关键词 ] ANSYS ；地震断层；X80 管道；应变响应 Strain response analysis of X80 buried pipeline crossing earthquake fault [Wei DONG. Lisong ZHANG, Xiangzhen YAN, Xiujuan YANG] [Oil and Gas CAE Technology Research Center] [China University of Petroleum, Qingdao, 266555, Shandong] [ Abstract ] Earthquake fault movement is one of the important factors to buried pipeline damage, so studying on buried pipeline failure mechanism due to fault movement is still lifeline engineering frontier topic. Considering interaction effect between buried pipeline and soil medium, pipeline is analyzed in fault dislocation response as thin shell structure. Pipeline model can be simplified as thin shell structure with four nodes, and soil medium can be simplified as spring element, so finite element model of shell-spring under the condition of earthquake fault is established. Many factors influences pipeline damage, such as material nonlinearity, pipeline geometric parameters, buried depth, fault types, intersection angle, and ANSYS is introduced to analyze the problem. The results show that the larger of intersection angle, the smaller of the axial compressive strain;