【摘要】：本文對特殊環(huán)境下埋地大直徑管道響應(yīng)的分析方法,以及基于GIS生命線系統(tǒng)承災(zāi)能力的預(yù)測進(jìn)行了研究。目前淺埋管道具有大管徑、大變形、多工況的特點(diǎn),這些特征使得研究生命線震害預(yù)測變得異常困難。本課題將采用ABAQUS有限元軟件,建立適當(dāng)?shù)哪Ｐ蛯μ厥猸h(huán)境中地下管道的反應(yīng)進(jìn)行數(shù)值分析研究,并把研究的結(jié)果在GIS系統(tǒng)中展現(xiàn),形成生命線震害預(yù)測系統(tǒng)。主要研究內(nèi)容如下:首先,本文分析總結(jié)了斷層的研究理論、管道在斷層下的破壞形式以及斷層錯動下內(nèi)力的經(jīng)典計算方式;場地土的液化的機(jī)理、場地土液化的影響因素以及場地土液化后內(nèi)力的經(jīng)典計算方法。給出了本文建模所用到的管土接觸模型以及管道殼模型的建立方法。然后,運(yùn)用ABAQUS有限元軟件建立斷層錯動下大直徑連續(xù)管道的反應(yīng)模型。分析時考慮不同參數(shù)如斷層類型、管道在斷層下的穿越角、斷層破碎帶距離、斷層錯動位移對管道錯動反應(yīng)的影響規(guī)律以及多個因素聯(lián)合作用下管道的反應(yīng)規(guī)律和工程應(yīng)用。最后總結(jié)出斷層錯動下管道的簡化計算公式。然后以同樣的研究思路,運(yùn)用ABAQUS有限元軟件建立液化場地下大直徑連續(xù)管道的反應(yīng)模型。采用地震加速度的形式在模型底面加載來模擬地震對管道的破壞作用。分析時首先研究不同方向的荷載對管道的影響,然后考慮不同參數(shù)如液化區(qū)長度、管道壁厚、管道埋深對管道在液化條件下的影響規(guī)律,以及多因素聯(lián)合作用反應(yīng)規(guī)律。最后總結(jié)出液化條件下管道的簡化計算公式,并以靜力加載方式做了對比分析,驗(yàn)證了簡化公式的可行性。最后,在GIS上形成管道初步的震害預(yù)測模塊,即根據(jù)之前斷層及液化的有限元模型,把特殊環(huán)境下大直徑連續(xù)管道的破壞結(jié)果保存為圖片格式供GIS的震害預(yù)測模塊調(diào)用。系統(tǒng)初步開發(fā)了管道破壞的應(yīng)力應(yīng)變分析功能,極大地豐富了地理信息系統(tǒng)的震害預(yù)測能力,為GIS的管道抗震分析提供了依據(jù)。
[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.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U173

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 趙澤霖;焦光偉;周建庭;鄭R己，

本文編號：2213096