Offset Channels May Not Accurately Record Strike‐Slip Fault Displacement: Evidence From Landscape Evolution Models

2019 ◽  
Vol 124 (12) ◽  
pp. 13427-13451 ◽  
Author(s):  
Nadine G. Reitman ◽  
Karl J. Mueller ◽  
Gregory E. Tucker ◽  
Ryan D. Gold ◽  
Richard W. Briggs ◽  
...  
Keyword(s):  
Landscape Evolution ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Fault Displacement

Pipeline Design Method Against Large Displacement of Strike-Slip Fault

2016 ◽  
Author(s):  
Keita Oda ◽  
Takahiro Ishihara ◽  
Masakatsu Miyajima
Keyword(s):  
Elastic Limit ◽  
Design Method ◽  
Fem Analysis ◽  
Relative Displacement ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Large Displacement ◽  
Pipeline System ◽  
Tensile Direction ◽  
Fault Displacement

This study proposes a method for designing a water pipeline system against fault displacement by incorporating earthquake resistant ductile iron pipes (ERDIPs). An ERDIP pipeline is capable of absorb the large ground displacements that occur during severe earthquakes by movement of its joint (expansion, contraction and deflection) and the use of the joint locking system. Existing ERDIP pipelines have been exposed to several severe earthquakes such as the 1995 Kobe Earthquake and the 2011 Great East Japan Earthquake, and there has been no documentation of their failure in the last 40 years. In the case of a pipeline that crosses a fault, there is the possibility of the occurrence of a local relative displacement between the pipeline and the ground. It is known that an ERDIP pipeline withstands a fault of axial compression direction by past our study. Hence, this present study was targeted at developing a method for designing an ERDIP pipeline that is capable of withstanding a strike-slip fault of axial tensile direction for a pipeline. This was done by FEM analysis wherein the ERDIPs and spring elements were used to model the soil and ERDIP joints. An ERDIP pipeline can accommodate a fault displacement of about 2 m by joint expansion/contraction and deflection, while maintaining the stress in the pipeline within the elastic limit. However, additional countermeasure is required when the fault displacement exceeds 2 m because such could stress the pipeline beyond the elastic limit. The use of large displacement absorption unit is an effective countermeasure for displacements exceeding 2 m. The expansion/contraction capacity of a unit is 10 times that of an ERDIP joint and it is able to absorb a locally-concentrated axial displacement of the pipeline. It was confirmed in the present study that an ERDIP pipeline with large displacement absorption unit, referred to as a large displacement absorption system, could accommodate fault displacement in excess of 2 m within the elastic stress range of the pipeline.

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.

scholarly journals Evaluation of the Response of Buried Steel Pipelines Subjected to the Strike-slip Fault Displacement

2017 ◽  
Vol 3 (9) ◽  
pp. 661-671 ◽  
Author(s):  
Mohsen Oghabi ◽  
Mehdi Khoshvatan ◽  
Aminaton Marto
Keyword(s):  
Strike Slip ◽  
Strike Slip Fault ◽  
Fault Displacement

Co-seismic strike–slip fault displacement determined from push-up structures: the Selsund Fault case, South Iceland

2004 ◽  
Vol 26 (4) ◽  
pp. 709-724 ◽  
Author(s):  
Jacques Angelier ◽  
Françoise Bergerat ◽  
Magalie Bellou ◽  
Catherine Homberg
Keyword(s):  
Strike Slip ◽  
Strike Slip Fault ◽  
Fault Displacement ◽  
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