Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pure bending of pipe-in-pipe systems
Abstract Subsea pipelines and PIP systems experience large bending moments during installation and operation. However, unlike single-walled pipelines, the behaviour of PIPs under bending has been only marginally addressed. In the current study, the bending response of PIP systems with diameter-to-thickness ratio (D/t) of 15–40 is investigated. Linear bifurcation analyses (LBA) and geometrically nonlinear analyses (GNA) are conducted on PIPs of varying lengths. Analytical expressions are provided to predict the classical and nonlinear limit moments of PIPs, and are compared to existing expressions for single-walled pipelines. Ultimate bending moments of PIPs are obtained from physical four-point bending tests and are compared against geometrically and materially nonlinear analyses (GMNA). The finite element results show that in PIPs with centralizers, the limit moments (GNA) drop slightly, however, the ultimate moments (GMNA) remain unchanged. A parametric study of the effect of geometry and material properties of the inner and outer pipes on the ultimate moment of PIPs is presented. It is understood that the ultimate moments of PIPs with thick tubes are predominantly influenced by the material nonlinearities rather than ovalization of the tubes.
Highlights Linear buckling analyses (LBA) and nonlinear geometrically analyses (GNA) are conducted on PIPs of varying lengths. Analytical expressions are provided to predict the classical and nonlinear limit moments of PIPs. The ultimate moments of PIPs are calculated from four-point bending tests. A parametric study on the effect of geometric and material properties of the tubes on the ultimate moments is presented. The ultimate moments of PIPs with thick tubes are predominantly influenced by the material nonlinearities.
Pure bending of pipe-in-pipe systems
Abstract Subsea pipelines and PIP systems experience large bending moments during installation and operation. However, unlike single-walled pipelines, the behaviour of PIPs under bending has been only marginally addressed. In the current study, the bending response of PIP systems with diameter-to-thickness ratio (D/t) of 15–40 is investigated. Linear bifurcation analyses (LBA) and geometrically nonlinear analyses (GNA) are conducted on PIPs of varying lengths. Analytical expressions are provided to predict the classical and nonlinear limit moments of PIPs, and are compared to existing expressions for single-walled pipelines. Ultimate bending moments of PIPs are obtained from physical four-point bending tests and are compared against geometrically and materially nonlinear analyses (GMNA). The finite element results show that in PIPs with centralizers, the limit moments (GNA) drop slightly, however, the ultimate moments (GMNA) remain unchanged. A parametric study of the effect of geometry and material properties of the inner and outer pipes on the ultimate moment of PIPs is presented. It is understood that the ultimate moments of PIPs with thick tubes are predominantly influenced by the material nonlinearities rather than ovalization of the tubes.
Highlights Linear buckling analyses (LBA) and nonlinear geometrically analyses (GNA) are conducted on PIPs of varying lengths. Analytical expressions are provided to predict the classical and nonlinear limit moments of PIPs. The ultimate moments of PIPs are calculated from four-point bending tests. A parametric study on the effect of geometric and material properties of the tubes on the ultimate moments is presented. The ultimate moments of PIPs with thick tubes are predominantly influenced by the material nonlinearities.
Pure bending of pipe-in-pipe systems
Binazir, Ali (Autor:in) / Karampour, Hassan (Autor:in) / Sadowski, Adam J. (Autor:in) / Gilbert, Benoit P. (Autor:in)
Thin-Walled Structures ; 145
27.08.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Bending Capacity of Pipe-in-Pipe Systems Subjected to External Pressure
| Springer Verlag | 2019
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