場地沉降條件下埋地輸液管道損傷的簡化模型研究
[Abstract]:The mechanical damage analysis of buried pipeline under the condition of site settlement is the basis of studying the failure mechanism of buried pipeline and preventing the accident of buried pipeline. So it is necessary to study the stress and deformation of buried pipeline structure under the action of large displacement. Therefore, the research on pipeline damage under site settlement is divided into three parts: experimental study of pipeline damage, comparative analysis of numerical simulation and establishment of corresponding theoretical simplified model. The deformation curve of pipeline in settlement site is cubic function curve, the maximum axial strain appears in the center of settlement zone when the pipeline is separated from the lower soil mass in settlement zone, the experimental study on the stress of buried pipeline under site settlement condition shows that the deformation curve of pipeline in settlement site is cubic function curve. The stress transfer of small diameter is faster than that of large diameter under the same conditions. The smaller the diameter of the tube, the larger the axial strain, the easier it is to yield. Based on the finite element analysis software ADINA, the numerical analysis model is established, and the pipeline deformation curves obtained by experiment and simulation are compared and analyzed. Then the numerical model of buried pipeline with different settlement zone length, buried depth, pipe diameter and internal pressure is established, and the relationship between the settlement range and the length of settlement zone is studied. The influence of different buried depths and pipe diameters on the maximum axial strain and location of the pipeline is analyzed. The relationship between strain zero point and pipe diameter and the influence of internal pressure on the axial strain of pipeline are obtained. The classical model of elastic foundation beam in non-settlement zone is established, and the function of deformation curve of buried pipeline in non-settlement area is deduced. According to the type and range of settlement area, the simplified formula of pipeline force is established for various settlement sites. Finally, the stress failure criterion and strain failure criterion are obtained to judge the pipeline stress damage, and the evaluation method of the pipeline's ability to resist the subsidence is obtained.
【學(xué)位授予單位】:華北理工大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TU433;U178
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 張一楠;馬貴陽;王桐宇;齊林;齊超;;土體沉降位置對管道跨越結(jié)構(gòu)應(yīng)力影響的數(shù)值計(jì)算[J];遼寧石油化工大學(xué)學(xué)報(bào);2016年05期
2 楊曉輝;趙子龍;李忱;張永升;耿佳;;采空區(qū)埋地管道沉降變形分析[J];太原科技大學(xué)學(xué)報(bào);2016年02期
3 周敏;杜延軍;王非;尤Oz;董冬冬;;地層沉陷中埋地HDPE管道力學(xué)狀態(tài)及模型試驗(yàn)分析[J];巖土工程學(xué)報(bào);2016年02期
4 李素貞;彭興華;李新亮;;基于沉降測量的管道力學(xué)性狀分析及誤差評估[J];湖南大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年09期
5 趙歡;鄧榮貴;高陽;;回填土不均勻沉降引起管道力學(xué)性狀變化的分析[J];路基工程;2014年01期
6 李新慧;;天然氣埋地管道沉降的有限元分析[J];巖土工程學(xué)報(bào);2013年S1期
7 黃崇偉;徐一峰;凌建明;童毅;;河浜管道管土相互作用及差異沉降分析[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2012年12期
8 韓冰;王芝銀;吳張中;趙宏林;荊宏遠(yuǎn);;基于應(yīng)變理論在采空區(qū)管道失效分析中的應(yīng)用[J];中國石油大學(xué)學(xué)報(bào)(自然科學(xué)版);2012年04期
9 薛景宏;呂培培;張超;;埋地管道斷層錯(cuò)動反應(yīng)分析[J];科學(xué)技術(shù)與工程;2009年03期
10 朱慶杰;陳艷華;蔣錄珍;;場地和斷層對埋地管道破壞的影響分析[J];巖土力學(xué);2008年09期
相關(guān)博士學(xué)位論文 前1條
1 徐平;采動沉陷影響下埋地管道與土相互作用及力學(xué)響應(yīng)研究[D];中國礦業(yè)大學(xué);2015年
相關(guān)碩士學(xué)位論文 前7條
1 武立偉;埋地管道極限懸空長度研究[D];西安石油大學(xué);2015年
2 曹建國;場地大變形下供水管道破壞試驗(yàn)及地震安全評估[D];浙江大學(xué);2014年
3 周敏;土體沉降和塌陷引起地下管道變形破壞的試驗(yàn)?zāi)M研究[D];太原理工大學(xué);2013年
4 張培;城市給水管道內(nèi)力響應(yīng)及其可靠度分析[D];重慶大學(xué);2012年
5 豐曉紅;跨斷層埋地輸氣管道斷層錯(cuò)動反應(yīng)分析方法研究[D];西南石油大學(xué);2012年
6 史永霞;埋地管線在沉陷情況下的響應(yīng)分析[D];大連理工大學(xué);2007年
7 楊俊濤;垂直荷載作用下埋地管道的縱向力學(xué)性狀分析[D];浙江大學(xué);2006年
,本文編號:2284108
本文鏈接:http://sikaile.net/jianzhugongchenglunwen/2284108.html