地基塌陷过程中埋地管线的有限元分析
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摘要
地基塌陷往往影响埋地管线的正常使用和安全,针对这一课题,在室内模型箱试验的基础上采用Ansys软件建立有限元模型,应用单元生死技术模拟了土体塌陷范围不断扩大的过程,得出随着地基塌陷埋地管线内应力及沉降的变化过程曲线。通过与室内试验数据对比,证明了本数值模拟方法的可行性。进而又通过图像分析找出了管线的控制截面及控制力,并研究了埋地管线的壁厚和下卧层土体刚度在地基塌陷过程中对管线变形的影响规律,得到了一些具有工程实际意义的结论,为沉陷区域埋地管线设计和数值分析提供理论依据。
For the subject that foundation collapse often affects normal use and safety of buried pipelines,the software ANSYS is emploied to establish finite element model on the basis of indoor experiment of the box model. The graduatly enlarge process of the soil collapsing is simulated by using the technology of cell life and death. The stress vs. deflection curves of pipeline buried under the subsoil are drawn out as the soil collapses. The feasibility of the numerical simulation method is verified by comparison with the indoor test data. The control section and control force of the pipeline are identified by analysis of images. The tube wall thickness and soil stiffness are taken into account to analyze their influnce on the buried pipeline when the soil is collapsing. Finally some meaningful conclusions are drawed,which will be a base study on the design and numerical analysis of buried pipelines subjected to the settlement of the soil.
For the subject that foundation collapse often affects normal use and safety of buried pipelines,the software ANSYS is emploied to establish finite element model on the basis of indoor experiment of the box model. The graduatly enlarge process of the soil collapsing is simulated by using the technology of cell life and death. The stress vs. deflection curves of pipeline buried under the subsoil are drawn out as the soil collapses. The feasibility of the numerical simulation method is verified by comparison with the indoor test data. The control section and control force of the pipeline are identified by analysis of images. The tube wall thickness and soil stiffness are taken into account to analyze their influnce on the buried pipeline when the soil is collapsing. Finally some meaningful conclusions are drawed,which will be a base study on the design and numerical analysis of buried pipelines subjected to the settlement of the soil.
引文
1 高田至郎.土沉陷时聚氯乙烯管道力学性能的实验研究.候忠良译.地下管线抗震.北京:学术书刊出版社,1990:204—214Kotokoro Takada.Experiment research on mechanical properties of PVC pipelines during soil settlement.in the seismic of underground pipeline.Trans Houzhongliang.Beijing:Academic Books Periodicals Publishing Company,1990:204—214
2 高惠瑛.受场地不均匀沉陷作用的埋地管道反应分析.哈尔滨:中国地震局工程力学研究所学位论文,1996Gao Huiying.Response analysis for buried pipelines subjected to the uneven settlement zone.Harbin:Academic Degree Thesis of Institute of Engineering Mechanics,China Earthquake Administration,1996
3 柳春光,史永霞.沉陷区域埋地管线数值模拟分析.地震工程与工程振动,2008;28(4):178—183Liu Chunguang,Shi Yongxia.Numerical analysis of buried pipelines subjected to the settlement.Journal of Earthquake Engineering and Engineering Vibration,2008;28(4):178—183
4 柳春光,冯晓波.采用等效弹簧边界分析埋地管线在沉陷情况下的反应.地震工程与工程振动,2009;29(6):197—202Liu Chunguang,Feng Xiaobo.Using equivalent spring boundary to anaiyze the response of buried pipeline subjected to ground settlement.Journal of Earthquake Engineering and Engineering Vibration,2009;29(6):197—202
5 张旭.由于地基沉降引起柔性管线的内力和变形的试验研究.太原:太原理工大学,2013Zhang Xu.Experiment Study of Deformation and Internal Force of Soft Pipeline Caused by Subsoil Settlemnet.Taiyuan:Taiyuan University of Technology,2013
6 薛娜,李鸿晶,孙广俊.跨断层埋地管线─土接触非连续变形分析.力学季刊,2013;34(2):324—330Xue Na,Li Hongjing,Sun Guangjun.Discontinuous deformation analysis on pipe-soil contact of buried pipeline due to fault.Chinese Quarterly of Mechanics,2013;34(2):324—330
7 杨旭,宋宏伟,秦玥宁.深基坑开挖对附近直埋管线影响的数值分析.水利与建筑工程学报,2011;9(3):19—24Yang Xu,Song Hongwei,Qin Yuening.Numerical analysis for influence of deep excavation on adjacent unprotected underground pipelines.Journal of Water Resources and Architectural Engineering,2011;9(3):19—24
8 张洪才,何波.ANSYS13.0从入门到实战.北京:机械工业出版社,2011:242Zhang Hongcai,He Bo.ANSYS13.0 from entry to actual combat.Beijing:China Machine Press,2011:242
2 高惠瑛.受场地不均匀沉陷作用的埋地管道反应分析.哈尔滨:中国地震局工程力学研究所学位论文,1996Gao Huiying.Response analysis for buried pipelines subjected to the uneven settlement zone.Harbin:Academic Degree Thesis of Institute of Engineering Mechanics,China Earthquake Administration,1996
3 柳春光,史永霞.沉陷区域埋地管线数值模拟分析.地震工程与工程振动,2008;28(4):178—183Liu Chunguang,Shi Yongxia.Numerical analysis of buried pipelines subjected to the settlement.Journal of Earthquake Engineering and Engineering Vibration,2008;28(4):178—183
4 柳春光,冯晓波.采用等效弹簧边界分析埋地管线在沉陷情况下的反应.地震工程与工程振动,2009;29(6):197—202Liu Chunguang,Feng Xiaobo.Using equivalent spring boundary to anaiyze the response of buried pipeline subjected to ground settlement.Journal of Earthquake Engineering and Engineering Vibration,2009;29(6):197—202
5 张旭.由于地基沉降引起柔性管线的内力和变形的试验研究.太原:太原理工大学,2013Zhang Xu.Experiment Study of Deformation and Internal Force of Soft Pipeline Caused by Subsoil Settlemnet.Taiyuan:Taiyuan University of Technology,2013
6 薛娜,李鸿晶,孙广俊.跨断层埋地管线─土接触非连续变形分析.力学季刊,2013;34(2):324—330Xue Na,Li Hongjing,Sun Guangjun.Discontinuous deformation analysis on pipe-soil contact of buried pipeline due to fault.Chinese Quarterly of Mechanics,2013;34(2):324—330
7 杨旭,宋宏伟,秦玥宁.深基坑开挖对附近直埋管线影响的数值分析.水利与建筑工程学报,2011;9(3):19—24Yang Xu,Song Hongwei,Qin Yuening.Numerical analysis for influence of deep excavation on adjacent unprotected underground pipelines.Journal of Water Resources and Architectural Engineering,2011;9(3):19—24
8 张洪才,何波.ANSYS13.0从入门到实战.北京:机械工业出版社,2011:242Zhang Hongcai,He Bo.ANSYS13.0 from entry to actual combat.Beijing:China Machine Press,2011:242
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