Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Three-dimensional Deformation Behavior for Buried Pipe Joints Subjected to Local Differential Settlement Using Three-direction Strain Measurement
https://orcid.org/http://orcid.org/0000-0003-0452-0428
https://orcid.org/http://orcid.org/0000-0001-5517-3345
https://orcid.org/http://orcid.org/0000-0002-8684-2289
https://orcid.org/http://orcid.org/0000-0003-4208-1518
The safety of buried flexible pipes is often discussed separately in terms of cross-sectional and longitudinal deformations, which can be clarified based on the circumferential and pipe axial strains, respectively. However, in modes of localized longitudinal deformation, such as differential settlement subjected to external pressure, principal strains (i.e., maximum tensile and compressive strains) on the pipe may occur in the directions different from the circumferential and axial directions. In this study, a model experiment to reproduce differential settlement was conducted using a pipe with a diameter of 300 mm, focusing on the actual damage caused by soil runoff around a buried pipe joint. In the experiment, the principal strains exerting on the pipe were calculated by measuring the strains in three directions: circumferential, axial, and intermediate. The results indicated that the principal strains in the pipe changed in the directions different from the circumferential and axial directions of the pipe owing to differential settlement, and they were approximately 1.5 times greater than the circumferential and axial strains. These results indicated the possibility of a new risk of pipe failure that cannot be captured through the strain only in a single direction (i.e., circumferential and axial pipe strains) as measured in previous studies. The results of this study are useful not only as a method to consider the behavior of a pipe deformed in cross-sectional and longitudinal directions combined, but also as a benchmark for the three-dimensional numerical analysis of buried pipes subjected to localized differential settlement.
Three-dimensional Deformation Behavior for Buried Pipe Joints Subjected to Local Differential Settlement Using Three-direction Strain Measurement
https://orcid.org/http://orcid.org/0000-0003-0452-0428
https://orcid.org/http://orcid.org/0000-0001-5517-3345
https://orcid.org/http://orcid.org/0000-0002-8684-2289
https://orcid.org/http://orcid.org/0000-0003-4208-1518
The safety of buried flexible pipes is often discussed separately in terms of cross-sectional and longitudinal deformations, which can be clarified based on the circumferential and pipe axial strains, respectively. However, in modes of localized longitudinal deformation, such as differential settlement subjected to external pressure, principal strains (i.e., maximum tensile and compressive strains) on the pipe may occur in the directions different from the circumferential and axial directions. In this study, a model experiment to reproduce differential settlement was conducted using a pipe with a diameter of 300 mm, focusing on the actual damage caused by soil runoff around a buried pipe joint. In the experiment, the principal strains exerting on the pipe were calculated by measuring the strains in three directions: circumferential, axial, and intermediate. The results indicated that the principal strains in the pipe changed in the directions different from the circumferential and axial directions of the pipe owing to differential settlement, and they were approximately 1.5 times greater than the circumferential and axial strains. These results indicated the possibility of a new risk of pipe failure that cannot be captured through the strain only in a single direction (i.e., circumferential and axial pipe strains) as measured in previous studies. The results of this study are useful not only as a method to consider the behavior of a pipe deformed in cross-sectional and longitudinal directions combined, but also as a benchmark for the three-dimensional numerical analysis of buried pipes subjected to localized differential settlement.
Three-dimensional Deformation Behavior for Buried Pipe Joints Subjected to Local Differential Settlement Using Three-direction Strain Measurement
https://orcid.org/http://orcid.org/0000-0003-0452-0428
https://orcid.org/http://orcid.org/0000-0001-5517-3345
https://orcid.org/http://orcid.org/0000-0002-8684-2289
https://orcid.org/http://orcid.org/0000-0003-4208-1518
The safety of buried flexible pipes is often discussed separately in terms of cross-sectional and longitudinal deformations, which can be clarified based on the circumferential and pipe axial strains, respectively. However, in modes of localized longitudinal deformation, such as differential settlement subjected to external pressure, principal strains (i.e., maximum tensile and compressive strains) on the pipe may occur in the directions different from the circumferential and axial directions. In this study, a model experiment to reproduce differential settlement was conducted using a pipe with a diameter of 300 mm, focusing on the actual damage caused by soil runoff around a buried pipe joint. In the experiment, the principal strains exerting on the pipe were calculated by measuring the strains in three directions: circumferential, axial, and intermediate. The results indicated that the principal strains in the pipe changed in the directions different from the circumferential and axial directions of the pipe owing to differential settlement, and they were approximately 1.5 times greater than the circumferential and axial strains. These results indicated the possibility of a new risk of pipe failure that cannot be captured through the strain only in a single direction (i.e., circumferential and axial pipe strains) as measured in previous studies. The results of this study are useful not only as a method to consider the behavior of a pipe deformed in cross-sectional and longitudinal directions combined, but also as a benchmark for the three-dimensional numerical analysis of buried pipes subjected to localized differential settlement.
Three-dimensional Deformation Behavior for Buried Pipe Joints Subjected to Local Differential Settlement Using Three-direction Strain Measurement
Transp. Infrastruct. Geotech.
Sonoda, Yusuke (Autor:in) / Sawada, Yutaka (Autor:in) / Ono, Kohei (Autor:in) / Ohta, Yoko (Autor:in) / Kawabata, Toshinori (Autor:in)
Transportation Infrastructure Geotechnology ; 10 ; 1089-1110
01.12.2023
22 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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