Impact analysis of seismic performance on buried pipeline crossing faults in defect factors

2014 ◽  
Author(s):  
Hongpeng Li ◽  
Wu Liu ◽  
Zhaoqian Luo ◽  
Chao An
Keyword(s):  
Seismic Performance ◽  
Impact Analysis ◽  
Buried Pipeline ◽  
Pipeline Crossing

Damage evolution mechanism of buried pipeline crossing reverse fault

2021 ◽  
Vol 35 (1) ◽  
pp. 71-77
Author(s):  
J. Zhang ◽  
Y. Chen ◽  
B. F. Liang ◽  
B. Pan
Keyword(s):  
Damage Evolution ◽  
Reverse Fault ◽  
Buried Pipeline ◽  
Evolution Mechanism ◽  
Pipeline Crossing

Mechanical Behavior of Buried Pipeline Crossing Thaw Settlement Zone

2021 ◽  
Author(s):  
Rui Xie ◽  
Prof. Jie Zhang
Keyword(s):  
Mechanical Behavior ◽  
Axial Strain ◽  
Compressive Strain ◽  
High Stress ◽  
Axial Direction ◽  
Soil Parameters ◽  
Buried Pipeline ◽  
Obvious Effect ◽  
Thaw Settlement ◽  
Pipeline Crossing

Abstract Thaw settlement is one of main reason caused pipeline failure crossing cold region. Mechanical behavior of buried pipeline crossing thaw settlement zone is investigated. Effects of pipeline and soil parameters on the buried pipeline were discussed. The results show that the high stress area and the max axial strain of the pipeline is at the edge of the thaw settlement zone. The upper surface of the pipeline is tensile strain, while the lower surface is compressive strain. The max ovality of pipeline near the edge of thaw settlement zone tends to oval. The pipeline axial strain, ovality and displacement decreases with the increasing of pipeline wall thickness, while the change of high stress area is not obvious. The high stress area and ovality decrease with the increasing of pipeline diameter, while the high stress area is expanded along the axial direction, but axial strain decreases slightly. The high stress area, axial strain, ovality and displacement of pipeline decrease with the buried depth increases. With the internal pressure increases, the stress and axial strain of pipeline increase, but the ovality decreases. The soil`s elasticity modulus has no obvious effect on pipeline`s stress, axial strain and displacement, but it can affect ovality slightly.

Strain design method of buried pipeline crossing fault

2019 ◽  
Vol 105 ◽  
pp. 659-671
Author(s):  
Wu Liu ◽  
Qin Guo ◽  
Chunfeng Qiao ◽  
Wanggang Hou
Keyword(s):  
Design Method ◽  
Buried Pipeline ◽  
Strain Design ◽  
Pipeline Crossing

Mechanical Behavior Analysis of the Buried Steel Pipeline Crossing Landslide Area

2016 ◽  
Vol 138 (5) ◽  
Author(s):  
Jie Zhang ◽  
Zheng Liang ◽  
Chuanjun Han
Keyword(s):  
Mechanical Behavior ◽  
Tensile Strain ◽  
Structural Integrity ◽  
High Stress ◽  
Soil Parameters ◽  
Buried Pipeline ◽  
Landslide Area ◽  
Steel Pipeline ◽  
Bending Deformation ◽  
Pipeline Crossing

Landslide movement is one of the threats for the structural integrity of buried pipelines that are the main ways to transport oil and gas. In order to offer a theoretical basis for the design, safety evaluation, and maintenance of pipelines, mechanical behavior of the buried steel pipeline crossing landslide area was investigated by finite-element method, considering pipeline-soil interaction. Effects of landslide soil parameters, pipeline parameters, and landslide scale on the mechanical behavior of the buried pipeline were discussed. The results show that there are three high stress areas on the buried pipeline sections where the bending deformation are bigger. High stress area of the compression side is bigger than it on the tensile side, and the tensile strain is bigger than the compression strain in the deformation process. Buried pipeline in the landslide bed with hard soil is prone to fracture. Bigger deformations appear on the pipeline sections that the inside and outside lengths of the interface are 30 m and 10 m, respectively. The maximum displacement of the pipeline is smaller than the landslide displacement for the surrounding soil deformation. Bending deformations and tensile strain of the pipeline increase with the increase in landslide displacement. Bending deformation and the maximum tensile strain of the pipeline increase with increasing of the soil's elasticity modulus, cohesion, and pipeline's diameter–thickness ratio. Soil's Poisson's ratio has a great effect on the displacement of the middle part, but it has a little effect on other sections' displacement.

A Model Test on Buried Pipeline Crossing Xi'an Ground Fissures

2011 ◽  
Author(s):  
Hongjia Liu ◽  
Yuming Men ◽  
Liangxia Cheng ◽  
Jianbin Pen ◽  
Qiangbin Huang ◽  
...  
Keyword(s):  
Model Test ◽  
Buried Pipeline ◽  
Ground Fissures ◽  
Pipeline Crossing

Study on Anti-Seismic Reliability of Urban Water Supply System

2012 ◽  
Vol 238 ◽  
pp. 868-871 ◽  
Author(s):  
Xiao Juan Li ◽  
Fei Min Shen
Keyword(s):  
Water Supply ◽  
Seismic Performance ◽  
Network Connectivity ◽  
Damage Mechanism ◽  
Supply System ◽  
Water Supply System ◽  
Urban Water Supply ◽  
Buried Pipeline ◽  
Seismic Reliability ◽  
The City

According to the seismic damage mechanism of the buried pipeline，the seismic performance of single pipeline is evaluated quantitatively. The network connectivity is analyzed with Monte-Carlo method and seismic performance of the whole network system is evaluated quantitatively. Finally, the anti-seismic reliability of the main water supply system is analyzed in the City of Fuzhou. The results indicate that the proposed method is feasible, accurate and effective, which provides references for further research of design, optimization and reformation of the urban buried pipeline.

Seismic Performance Analysis of Buried Pipeline

2011 ◽  
Vol 255-260 ◽  
pp. 2466-2470 ◽  
Author(s):  
Shuang Hua He ◽  
Zhi Peng Li ◽  
Xin Zhong Zhang
Keyword(s):  
Performance Analysis ◽  
Seismic Performance ◽  
Incident Angle ◽  
Wave Theory ◽  
Seismic Wave Propagation ◽  
Theory Method ◽  
Buried Pipeline ◽  
Axial Deformation ◽  
Deformation Transfer ◽  
Seismic Deformation

Taking the breakage of the conduit joints caused by seismic wave propagation as main failure mode, seismic performance analysis of the pipeline was performed with wave theory method by considering pipe’s axial deformation. Influencing factors of pipe’s deformation such as seismic wave’s incident angle, shear wave velocity, pipeline’s diameter and wall thickness were deeply discussed. Two different methods for calculating axial deformation transfer coefficient were presented to check pipeline’s seismic deformation.

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