scholarly journals Local Buckling Behavior and Plastic Deformation Capacity of High-Strength Pipe at Strike-Slip Fault Crossing

Metals ◽  
2017 ◽  
Vol 8 (1) ◽  
pp. 22 ◽  
Author(s):  
Xiaoben Liu ◽  
Hong Zhang ◽  
Baodong Wang ◽  
Mengying Xia ◽  
Kai Wu ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Local Buckling ◽  
High Strength ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Deformation Capacity ◽  
Buckling Behavior

Buckling Behavior of Buried High Strength Steel Pipeline Under Compression Strike-Slip Fault Movement

2017 ◽  
Author(s):  
Xiaoben Liu ◽  
Hong Zhang ◽  
Mengying Xia ◽  
Meng Li
Keyword(s):  
Local Buckling ◽  
High Strength ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Ground Movement ◽  
Pipe Failure ◽  
Axial Section ◽  
Buckling Behavior ◽  
Fault Displacement ◽  
Critical Fault

Active fault is the most dangerous natural hazards of buried steel pipelines, as large stress and strain induced by ground movement can lead to pipe failure, which may cause severe accidents. Based on nonlinear finite element method, local buckling behavior of buried high strength X80 steel pipelines under compression strike-slip fault was studied systematically. Accuracy of the numerical model was validated by previous full scale experimental results. A baseline analysis was performed to elucidate the local buckling phenomenon of pipe. Parametric analysis was also performed to investigate the effects of influence factors of pipe’s buckling behavior. Results shows that, when local buckling occurs, axial section force decreases abruptly. When pipe-fault intersection angle equals 135°, the maximum axial section force peaks and the critical fault displacement is the smallest. With the increase of pipe wall thickness, the maximum axial section force and the critical fault displacement increases. With the increase of pipe internal pressure, the maximum axial section force and the critical fault displacement decreases. When p = 0MPa, inward-diamond buckling occurs in the pipe. While p≥4MPa, elephant-foot buckling occurs in the pipe.

Effects of Stress–Strain Characteristics on Local Buckling of X80 Pipe Subjected to Strike-Slip Fault Movement

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Xiaoben Liu ◽  
Hong Zhang ◽  
Onyekachi Ndubuaku ◽  
Mengying Xia ◽  
J. J. Roger Cheng ◽  
...  
Keyword(s):  
Structural Integrity ◽  
Local Buckling ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Large Strains ◽  
Fe Model ◽  
Stress Strain ◽  
Shell Elements ◽  
Steel Material ◽  
Buckling Behavior

The structural integrity of underground pipelines are subject to a major threat from permanent ground displacements when they cross active tectonic (e.g., strike-slip) faults, because of large strains potentially induced in pipes, leading to pipe buckling and possible rupture. In this paper, the buckling behavior of X80 pipe is studied numerically with an emphasis on the effects of steel stress–strain characteristics. A rigorous mechanics-based nonlinear finite element (FE) model of a buried X80 pipe crossing a strike-slip fault is developed using shell elements and nonlinear springs for the pipe and soil resistance, respectively. The pipe steel material in the FE model is characterized by a novel and versatile stress–strain relationship, which was established to successfully capture both the round-house (RH) type and the yield-plateau (YP) type stress–strain behaviors. This allows investigating the significant effects of the stress–strain characteristics, as observed in this paper, on the buckling behavior of pressurized and nonpressurized pipes.

11.52: Local buckling behavior and plastic deformation capacity of H-shaped beams under reversed axial forces

ce/papers ◽  
2017 ◽  
Vol 1 (2-3) ◽  
pp. 3259-3268
Author(s):  
Atsushi Suzuki ◽  
Yoshihiro Kimura ◽  
Kazuhiko Kasai
Keyword(s):  
Plastic Deformation ◽  
Local Buckling ◽  
Deformation Capacity ◽  
Axial Forces ◽  
Buckling Behavior

Study on the Local Buckling Behavior of Steel Equal Angle Members under Axial Compression with the Steel Strength Variation

2011 ◽  
Vol 374-377 ◽  
pp. 2430-2436
Author(s):  
Gang Shi ◽  
Zhao Liu ◽  
Yong Zhang ◽  
Yong Jiu Shi ◽  
Yuan Qing Wang
Keyword(s):  
Finite Element ◽  
Axial Compression ◽  
High Strength Steel ◽  
Local Buckling ◽  
Steel Structures ◽  
High Strength ◽  
Element Analysis ◽  
Equal Angle ◽  
Buckling Behavior ◽  
Steel Strength

High strength steel sections have been increasingly used in buildings and bridges, and steel angles have also been widely used in many steel structures, especially in transmission towers and long span trusses. However, high strength steel exhibits mechanical properties that are quite different from ordinary strength steel, and hence, the local buckling behavior of steel equal angle members under axial compression varies with the steel strength. However, there is a lack of research on the relationship of the local buckling behavior of steel equal angle members under axial compression with the steel strength. A finite element model is developed in this paper to analyze the local buckling behavior of steel equal angle members under axial compression, and study its relationship with the steel strength and the width-to-thickness ratio of the angle leg. The finite element analysis (FEA) results are compared with the corresponding design method in the American code AISC 360-05, which provides a reference for the related design.

Experimental and Numerical Investigation Into the Behavior of Buried Steel Pipelines Under Strike-Slip Fault Movement

2016 ◽  
Author(s):  
Sjors H. J. van Es ◽  
Arnold M. Gresnigt
Keyword(s):  
Numerical Model ◽  
Local Buckling ◽  
Computation Time ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Soil Conditions ◽  
Test Results ◽  
Fault Movement ◽  
Nonlinear Springs ◽  
Deformational Behavior

Buried steel pipelines for water and hydrocarbon transmission in seismic regions may be subjected to large imposed deformations. When a buried pipeline crosses an active strike-slip fault, the relative motion of the two soil bodies in which is it embedded can lead to significant deformation of the pipeline and possibly to loss of containment. To be able to fully understand the effects of this movement and the interaction between pipe and soil on the strain demands in the pipeline, a novel full scale experimental setup has been developed. To allow accurate monitoring of the pipeline deformation, the pipe-surrounding soil has been replaced with appropriate nonlinear springs, leaving the pipe bare during the experiment. In a total of ten tests, the strain demand in a pipeline as a result of these ground-induced deformations has been investigated. The testing program includes variations of pipeline geometry, steel grade and internal pressure. Furthermore, cohesive and non-cohesive soils have been simulated in the tests. Observed responses of the pipeline include local buckling, high tensile strains (up to 5%) and, in one case, cracking of the pipeline. Based on experiences with these experiments, a numerical model has been developed that uses non-linear springs to model the pipe-soil interaction. By modelling the pipe and soil conditions that were simulated in the ten experiments, this model has been calibrated and validated. Comparisons between the model predictions and test results show that the numerical model is able to predict the deformational behavior of the pipeline accurately. Moreover, also the formation of local buckles is predicted with satisfying results. The results of the validation operation lead to the conclusion that the new model is performing well. By omitting the modelling of the full soil body, computation time is reduced, increasing practical use of the developed model.

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