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.

scholarly journals Numerical simulation of buckling behavior of the buried steel pipeline under reverse fault displacement

2015 ◽  
Vol 6 (2) ◽  
pp. 203-210 ◽  
Author(s):  
J. Zhang ◽  
Z. Liang ◽  
C. J. Han ◽  
H. Zhang
Keyword(s):  
Friction Coefficient ◽  
Internal Pressure ◽  
Structural Integrity ◽  
Reverse Fault ◽  
Buried Pipeline ◽  
Buckling Mode ◽  
Steel Pipeline ◽  
Buckling Behavior ◽  
Pressure Pipeline ◽  
Fault Displacement

Abstract. Reverse fault movement is one of the threats for the structural integrity of buried oil-gas pipelines caused by earthquakes. Buckling behavior of the buried pipeline was investigated by finite element method. Effects of fault displacement, internal pressure, diameter-thick ratio, buried depth and friction coefficient on buckling behavior of the buried steel pipeline were discussed. The results show that internal pressure is the most important factor that affecting the pipeline buckling pattern. Buckling mode of non-pressure pipeline is collapse under reverse fault. Wrinkles appear on buried pressure pipeline when the internal pressure is more than 0.4 Pmax. Four buckling locations appear on the buried pressure pipeline under bigger fault displacement. There is only one wrinkle on the three locations of the pipeline in the rising formation, but more wrinkles on the fourth location. Number of the wrinkle ridges and length of the wavy buckling increase with the increasing of friction coefficient. Number of buckling location decreases gradually with the decreasing of diameter-thick ratio. A protective device of buried pipeline was designed for preventing pipeline damage crossing fault area for its simple structure and convenient installation. Those results can be used to safety evaluation, maintenance and protection of buried pipelines crossing fault area.

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

Damage evolution mechanism in production blasting excavation under different stress fields

2019 ◽  
Vol 97 ◽  
pp. 101969 ◽  
Author(s):  
L.X. Xie ◽  
Q.B. Zhang ◽  
J.C. Gu ◽  
W.B. Lu ◽  
S.Q. Yang ◽  
...  
Keyword(s):  
Damage Evolution ◽  
Stress Fields ◽  
Evolution Mechanism ◽  
Blasting Excavation

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.

scholarly journals Study on the damage evolution mechanism of geomaterials/soil interfaces under the action of drawing

AIP Advances ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 055107
Author(s):  
Fu Yi ◽  
Xupeng Qi ◽  
Jun Li ◽  
Hui Li ◽  
Ming Fan ◽  
...  
Keyword(s):  
Damage Evolution ◽  
Evolution Mechanism

scholarly journals Research on dynamic mechanical behavior and damage evolution mechanism of Cu/WCp laminated composites

2021 ◽  
Vol 8 (1) ◽  
pp. 016530
Author(s):  
Zhang Yubo ◽  
Guo Rongxin ◽  
Xia Haiting ◽  
Yan Feng ◽  
Liu Xing Yao
Keyword(s):  
Mechanical Behavior ◽  
Damage Evolution ◽  
Laminated Composites ◽  
Evolution Mechanism ◽  
Dynamic Mechanical ◽  
Dynamic Mechanical Behavior
Sign in / Sign up

Export Citation Format

Share Document