The effects of finite length and axial force for buried pipelines in bending

Gantes, CJ; Gerogianni, DS

dc.contributor.author	Gantes, CJ	en
dc.contributor.author	Gerogianni, DS	en
dc.date.accessioned	2014-03-01T01:52:01Z
dc.date.available	2014-03-01T01:52:01Z
dc.date.issued	2002	en
dc.identifier.issn	03043622	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26532
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0041438863&partnerID=40&md5=218b54ab6d64039ed3fc0ecdaa69adde	en
dc.subject	Axial Force	en
dc.subject	Bending Moment	en
dc.subject	Brazier Effect	en
dc.subject	Buried Pipelines	en
dc.subject	Finite Length	en
dc.subject	Ovalization	en
dc.subject.other	Bending (deformation)	en
dc.subject.other	Bifurcation (mathematics)	en
dc.subject.other	Buckling	en
dc.subject.other	Loads (forces)	en
dc.subject.other	Pressure effects	en
dc.subject.other	Soil mechanics	en
dc.subject.other	Strain	en
dc.subject.other	Stress analysis	en
dc.subject.other	Structural analysis	en
dc.subject.other	Underground structures	en
dc.subject.other	Buckling loads	en
dc.subject.other	Buckling moments	en
dc.subject.other	Pipeline bends	en
dc.title	The effects of finite length and axial force for buried pipelines in bending	en
heal.type	journalArticle	en
heal.publicationDate	2002	en
heal.abstract	In the previous companion paper it was explained how the bending behavior of long cylinders with deformable cross-sections is associated with a nonlinear phenomenon, called the Brazier effect. Nonlinearity is induced by ovalization of the originally circular cross-section, which decreases the moment of inertia and leads to a nonlinear moment-curvature relation. In addition, the deformation of the cross-section increases the axial bending stresses and lowers the structure 's local buckling load. This effect was treated analytically for the case of buried pipelines, where ovalization is partly hampered by the surrounding soil Approximate analytical expressions for the Brazier limit moment and the local buckling moment of infinitely long buried pipelines under bending and internal pressure were derived, depending on the stiffness of the surrounding soil, modeled with linear radial translational springs. In this paper, the above approach is extended for the cases of infinitely long buried pipelines under bending and axial force, as well as for buried pipelines of finite length. The nonlinear moment-curvature relation is again obtained through energy considerations, with an additional term representing the strain energy of the soil springs. Parametric studies describe the effect of different soil types.	en
heal.journalName	Journal of the International Association for Shell and Spatial Structures	en
dc.identifier.volume	43	en
dc.identifier.issue	139	en
dc.identifier.spage	115	en
dc.identifier.epage	123	en