Stress analysis of buried steel pipelines at strike-slip fault crossings   总被引：3，自引：0，他引：3  

Dimitrios K. Karamitros  George D. Bouckovalas  George P. Kouretzis 《Soil Dynamics and Earthquake Engineering》2007,27(3):200-211

Existing analytical methods for the stress analysis of buried steel pipelines at crossings with active strike-slip faults depend on a number of simplifications, which limit their applicability and may even lead to non-conservative results. The analytical methodology presented herein maintains the well-established assumptions of existing methodologies, but also introduces a number of refinements in order to achieve a more wide range of application without any major simplicity sacrifice. More specifically, it employs equations of equilibrium and compatibility of displacements to derive the axial force applied on the pipeline and adopts a combination of beam-on-elastic-foundation and elastic-beam theory to calculate the developing bending moment. Although indirectly, material and large-displacement non-linearities are also taken into account, while the actual distribution of stresses on the pipeline cross-section is considered for the calculation of the maximum design strain. The proposed methodology is evaluated against the results of a series of benchmark 3D non-linear analyses with the finite element method. It is shown that fairly accurate predictions of pipeline strains may be obtained for a wide range of crossing angles and fault movement magnitudes encountered in practice.  相似文献   

地下管线普查监理工作方法及现状探讨   总被引：2，自引：0，他引：2  

李春  鲍其胜  何立恒 《现代测绘》2006,29(5):24-26

本文主要介绍了地下管线普查监理基本原理、工作方法、实施措施和目前地下管线普查监理现状，并对目前地下管线普查监理中存在的问题进行探讨。  相似文献   

Numerical models of thermally and mechanically coupled two-layer convection of highly viscous fluids     

Kirk Ellsworth  Gerald Schubert 《Geophysical Journal International》1988,93(2):347-363

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地下管道震害预测实用方法的研究   总被引：2，自引：2，他引：2  

邓民宪  高晓康  张永凯 《地震工程与工程振动》2001,21(1):94-98

本文根据震害调查分析和试验研究结果，建立了由环境因素和管道结构参对地下管道震害进行二级多因素模型综合评判的方法，文中给出了计算，评价构成二级评判因素地震烈，场地类型，工作状态和结构种类正态模糊范数ak的方法，并在地下管道震害关联分析和试验基础上，给出了二级模糊评判的权向量，本文为面广量大的已那建下管道的震害预测工作提供了一套方便实用的计算方法。  相似文献   

探地雷达探测地下管线的能力   总被引：21，自引：0，他引：21  

袁明德 《物探与化探》2002,26(2):152-155,162

这是作者摘编的有关探地雷达探测管线的一些资料。通过细致的实验,从中分析管线的粗细、材质、充填物、缺损情况及天线频率、噪音等对雷达图像的影响,对今后开展城市管线探地雷达调查工作会有所帮助。  相似文献   

Northridge, California, earthquake of 1994: density of pipe breaks and surface strains     

M.D. Trifunac  M.I. Todorovska 《Soil Dynamics and Earthquake Engineering》1997,16(3):193-207

Empirical scaling equations are presented which relate the average number of water pipe breaks per km², , with the peak strain in the soil or intensity of shaking at the site. These equations are based on contour maps of peak surface strain evaluated from strong motion recordings, and observations of intensity of ground shaking and damage following the Northridge, California, earthquake of 17 January 1994. Histograms for the number of pipe breaks per km², n, are presented for several ranges of values of the horizontal peak strain and for several values of the site intensity. The observed distribution of pipe breaks is also used to speculate on possible more detailed geographical distribution of near surface strains in the San Fernando Valley and in central Los Angeles. The results can be used to predict number of pipe breaks in the San Fernando Valley and in Los Angeles, for a scenario earthquake or in probabilistic seismic hazard calculations, considering all possible scenarios that contribute to the hazard and the likelihood of their occurrence during specified exposure. Such predictions will be useful for emergency response planning (as the functioning of the water supply is critical for sanitation and in fighting fires caused by earthquakes), to estimate strains during future and past earthquakes in areas where no strong motion was recorded and in defining design guidelines for pipelines and other structures and structural systems sensitive to strains in the ground.  相似文献   

管线探测与管线（网）信息系统相结合提高市场竞争力   总被引：1，自引：0，他引：1  

姜作勤 《物探化探计算技术》1997,19(4):351-356

涉及上水、雨水、污水、热力、煤气、电力、电讯和工业管道的管线（网）是城市和企业的重要基础设施。有关信息是否完整、准确，对这些信息的管理是否有效直接影响着城市规划，管理的科学笥，合理性，影响城市建设的效率及安全，影响人民生活的正常秩序。随着我国经济建设的加快，城市规模的扩大，在管线探测与管网信息系统的建设方面形成了较大的市场潜力，本文分析了市场需求，发展现状和我部开拓相应市场的力量和技术优势，提出管  相似文献   

A semi-analytical method of stress-strain analysis of buried steel pipelines under submarine landslides     

《Applied Ocean Research》2016

A semi-analytical method of the stress-strain analysis of buried steel pipelines under submarine landslides was proposed, considering the nonlinearities of the pipe-soil interaction and mechanical properties of the pipe steel. The pipeline was divided into three parts according to different loading conditions, and the corresponding differential equations were established based on a combination of the beam-on-elastic foundation and elastoplastic-beam theories. According to the second-order central difference method, the transverse horizontal displacement was calculated, and then the bending strain was obtained based on the relation between bending strains and curvatures. Considering the interaction between the axial and bending strains, the axial strain can be derived from the equilibrium condition by equating the axial force. The proposed method was verified through the comparison of obtained solutions to ANSYS results, with minor deviations which do not exceed about 4.6%. Additionally, the effects of the slide width, the buried depth of pipelines, the internal friction angle of soils, the cohesion of soils and the bulk density of soils are investigated through parametric studies.  相似文献   

海底路由勘察自动化成图技术研究     

陈新玺  王锦明  宁楠  唐建忠 《测绘与空间地理信息》2016,(9):23-26

海底路由勘察综合图是海底电缆管道路由区的海底地形地貌、海底面状况和工程地质条件勘察成果的综合反映,是路由设计施工的重要依据。目前综合图的绘制需要大量人工编辑,缺乏批量生产能力,本文研究了路由勘察数据特征,利用AutoCAD VBA开发技术实现了水深数据分级分色展绘、地形剖面成图、浅地层剖面解译数据剖面投影以及成果图框的自动化生成,应用证明该技术对降低作业难度、提高内业处理效率具有较高的实用价值。  相似文献   

城市地面沉降对给排水管道变形的影响—以天津市塘沽区响螺湾地区为例     

彭涛  孙铁  宋晶 《地质通报》2008,27(11)

受地面沉降的影响,敷设在不同位置的给排水管道差异沉降明显。运用GEO-SLOPE软件中的SIGMA/W模块,对天津市塘沽区响螺湾地区敷设给排水管道的地面沉降特征进行数值模拟,分析给排水管道沉降破坏的机理,总结给排水管道的变形规律,指出响螺湾地区给排水管道的规划要点。通过层次分析法确定给排水管道的工程地质要素权重,综合评价给排水管道分布,为给排水管道规划提供合理的工程地质依据,减少地面沉降引发的环境工程地质问题,指导响螺湾地区的总体规划。  相似文献