地震波作用下的埋地燃气管道动力响应研究  

Study on dynamic response of buried gas pipelines to seismic waves

作　　者：赵新涛[1] 程贵海[2] 冯国建[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]广西大学资源与冶金学院,南宁530004

出　　处：《地球物理学进展》2011年第1期357-363,共7页Progress in Geophysics

基　　金：重庆大学研究生科技创新基金项目(200811A1B0060295)资助

摘　　要：埋地管道是现代城市的重要生命线工程,因其埋于地下,一旦遭遇地震,管道就有可能发生破坏,导致燃气泄露,可能引发火灾、爆炸等次生灾害,对人们的生命和财产造成严重威胁,因此,如何提高埋地燃气管道的抗震性能,是当前需要迫切解决的问题.认为在管道轴向上和横向上均与土体之间存在相对位移,结合拟静力法进行了地震波作用下埋地管道的动力响应分析,推导出了管道在地震波作用下的应变和应力表达式.对一具体算例进行了计算分析,计算结果表明:在地震波作用下,管道与土体之间的相对位移主要表现在轴向,管道一般不会发生破损,破坏易发生在接口位置,提高地基土类别和增加管道横截面积均可提高管道抗震性能.依据算例计算结果提出了四点抗震措施,可为城市埋地燃气管道抗震提供指导.Buried pipelines are the important lifeline of modern cities. When a major earthquake occurs, pipelines may be destroged, leading to gas leakage which can result in fire, explosion and other hazards. Therefore it is an urgent issue how to imporove the anti-seismic performance of buried pipelines. Considering relative displacement between the pipeline and soil in axial and radial directions, we use the quasi-static method to analyze dynamic response of the pipeline to seismic wares, and derive its strain and stress formulas. Calculation on a specific case shows that relative displacement between the pipeline and soil occurs mainly in axial direction. The interface locations are prone to damage, while the pipeline will be largely intact. The anti-seismic property of the pipeline can be enhanced by raising the foundation soil class and increasing cross-section area of the pipeline. Based on the result of calculation, we propose four anti-seismic measures which can provide guidance for design of pipeline anti-seismic work in cities.

关 键 词：埋地管道 燃气管道 动力响应 抗震措施 地震波作用 

分 类 号：P631[天文地球—地质矿产勘探]