连续管道特殊地质地震响应及基于GIS性态设计
发布时间：2018-08-30 12:41
【摘要】：本文对特殊环境下埋地大直径管道响应的分析方法,以及基于GIS生命线系统承灾能力的预测进行了研究。目前浅埋管道具有大管径、大变形、多工况的特点,这些特征使得研究生命线震害预测变得异常困难。本课题将采用ABAQUS有限元软件,建立适当的模型对特殊环境中地下管道的反应进行数值分析研究,并把研究的结果在GIS系统中展现,形成生命线震害预测系统。主要研究内容如下:首先,本文分析总结了断层的研究理论、管道在断层下的破坏形式以及断层错动下内力的经典计算方式;场地土的液化的机理、场地土液化的影响因素以及场地土液化后内力的经典计算方法。给出了本文建模所用到的管土接触模型以及管道壳模型的建立方法。然后,运用ABAQUS有限元软件建立断层错动下大直径连续管道的反应模型。分析时考虑不同参数如断层类型、管道在断层下的穿越角、断层破碎带距离、断层错动位移对管道错动反应的影响规律以及多个因素联合作用下管道的反应规律和工程应用。最后总结出断层错动下管道的简化计算公式。然后以同样的研究思路,运用ABAQUS有限元软件建立液化场地下大直径连续管道的反应模型。采用地震加速度的形式在模型底面加载来模拟地震对管道的破坏作用。分析时首先研究不同方向的荷载对管道的影响,然后考虑不同参数如液化区长度、管道壁厚、管道埋深对管道在液化条件下的影响规律,以及多因素联合作用反应规律。最后总结出液化条件下管道的简化计算公式,并以静力加载方式做了对比分析,验证了简化公式的可行性。最后,在GIS上形成管道初步的震害预测模块,即根据之前断层及液化的有限元模型,把特殊环境下大直径连续管道的破坏结果保存为图片格式供GIS的震害预测模块调用。系统初步开发了管道破坏的应力应变分析功能,极大地丰富了地理信息系统的震害预测能力,为GIS的管道抗震分析提供了依据。
[Abstract]:In this paper, the response analysis method of buried large diameter pipeline under special environment and the prediction of disaster bearing capacity based on GIS lifeline system are studied. At present, shallow buried pipelines have the characteristics of large diameter, large deformation and multiple working conditions, which make it extremely difficult to study the prediction of lifeline earthquake damage. In this paper, ABAQUS finite element software is used to establish an appropriate model for the numerical analysis and study of the response of underground pipelines in a special environment, and the results of the study are presented in the GIS system to form a lifeline earthquake disaster prediction system. The main research contents are as follows: firstly, this paper analyzes and summarizes the research theory of fault, the failure form of pipeline under fault, the classical calculation method of internal force under fault dislocation, the mechanism of site soil liquefaction, The influencing factors of site soil liquefaction and the classical calculation method of internal force after site soil liquefaction. The pipe-soil contact model used in this paper and the establishment method of pipe-shell model are given. Then, the response model of large diameter continuous pipeline under fault dislocation is established by using ABAQUS finite element software. Different parameters such as fault type, crossing angle of pipeline under fault, distance of fault fracture zone, influence of fault dislocation displacement on pipeline fault response, response law of pipeline under multiple factors and engineering application are taken into account in the analysis. Finally, the simplified calculation formula of pipeline under fault dislocation is summarized. Then the reaction model of large diameter continuous pipeline in liquefaction field is established by using ABAQUS finite element software with the same research idea. Seismic acceleration is used to simulate the damage of pipeline caused by earthquake at the bottom of the model. In the analysis, the influence of different direction load on pipeline is studied, and then the influence of different parameters such as liquefaction zone length, pipe wall thickness, pipeline buried depth on pipeline liquefaction condition, as well as the law of combined action of multiple factors are considered. Finally, the simplified calculation formula of pipeline under liquefaction condition is summarized, and the feasibility of the simplified formula is verified by comparing and analyzing the static loading method. Finally, the preliminary earthquake damage prediction module of pipeline is formed on GIS, that is, according to the finite element model of fault and liquefaction before, the damage result of large diameter continuous pipeline under special environment is saved as a picture format for GIS earthquake disaster prediction module to call. The system has developed the stress-strain analysis function of pipeline failure, which greatly enriches the earthquake disaster prediction ability of GIS, and provides the basis for seismic analysis of GIS pipeline.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U173
[Abstract]:In this paper, the response analysis method of buried large diameter pipeline under special environment and the prediction of disaster bearing capacity based on GIS lifeline system are studied. At present, shallow buried pipelines have the characteristics of large diameter, large deformation and multiple working conditions, which make it extremely difficult to study the prediction of lifeline earthquake damage. In this paper, ABAQUS finite element software is used to establish an appropriate model for the numerical analysis and study of the response of underground pipelines in a special environment, and the results of the study are presented in the GIS system to form a lifeline earthquake disaster prediction system. The main research contents are as follows: firstly, this paper analyzes and summarizes the research theory of fault, the failure form of pipeline under fault, the classical calculation method of internal force under fault dislocation, the mechanism of site soil liquefaction, The influencing factors of site soil liquefaction and the classical calculation method of internal force after site soil liquefaction. The pipe-soil contact model used in this paper and the establishment method of pipe-shell model are given. Then, the response model of large diameter continuous pipeline under fault dislocation is established by using ABAQUS finite element software. Different parameters such as fault type, crossing angle of pipeline under fault, distance of fault fracture zone, influence of fault dislocation displacement on pipeline fault response, response law of pipeline under multiple factors and engineering application are taken into account in the analysis. Finally, the simplified calculation formula of pipeline under fault dislocation is summarized. Then the reaction model of large diameter continuous pipeline in liquefaction field is established by using ABAQUS finite element software with the same research idea. Seismic acceleration is used to simulate the damage of pipeline caused by earthquake at the bottom of the model. In the analysis, the influence of different direction load on pipeline is studied, and then the influence of different parameters such as liquefaction zone length, pipe wall thickness, pipeline buried depth on pipeline liquefaction condition, as well as the law of combined action of multiple factors are considered. Finally, the simplified calculation formula of pipeline under liquefaction condition is summarized, and the feasibility of the simplified formula is verified by comparing and analyzing the static loading method. Finally, the preliminary earthquake damage prediction module of pipeline is formed on GIS, that is, according to the finite element model of fault and liquefaction before, the damage result of large diameter continuous pipeline under special environment is saved as a picture format for GIS earthquake disaster prediction module to call. The system has developed the stress-strain analysis function of pipeline failure, which greatly enriches the earthquake disaster prediction ability of GIS, and provides the basis for seismic analysis of GIS pipeline.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U173
【参考文献】
相关期刊论文 前10条
1 赵泽霖;焦光伟;周建庭;郑R己，
本文编号：2213096
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