Strength analysis of buried pipes under explosive loads

Provatidis, Ch; Kanarachos, A

dc.contributor.author	Provatidis, Ch	en
dc.contributor.author	Kanarachos, A	en
dc.date.accessioned	2014-03-01T02:48:42Z
dc.date.available	2014-03-01T02:48:42Z
dc.date.issued	1998	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34023
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0032278124&partnerID=40&md5=4d06bcc52c0d770203e2ae206c3a9679	en
dc.subject.other	Dynamic response	en
dc.subject.other	Finite element method	en
dc.subject.other	Mathematical models	en
dc.subject.other	Pipelines	en
dc.subject.other	Strength of materials	en
dc.subject.other	Stress analysis	en
dc.subject.other	Structural analysis	en
dc.subject.other	Underground structures	en
dc.subject.other	Buried pipes	en
dc.subject.other	Von Mises stress	en
dc.subject.other	Explosion testing	en
dc.title	Strength analysis of buried pipes under explosive loads	en
heal.type	conferenceItem	en
heal.publicationDate	1998	en
heal.abstract	Three-dimensional FEM models concerned with the transient response and relevant strength analysis of buried structures due to blast explosions were proven extremely costly using conventional FEM codes. This is due to the required small time-step as well as the considerable extension of the problem domain that has to be chosen so long that no reflection is allowed from the artificial infinite soil boundaries before the maximum displacement (or Von Mises stress) amplitude of the structure is reached. In case of buried pipelines, the complexity increases because the length of the model should at least include the unknown wave length along the pipeline. To overcome this problem, a reduced model taking into consideration the decoupled incident P- SH- and SV-waves, has been developed. The new theory achieves a manageable conservative relationship between the strength of the buried pipeline and the allowable peak particle velocity. The proposed relationship is based on the criterion of either the hoop or Von-Mises stresses and it is given in terms of the allowable stress as a percentage of the Specified Minimum Yield Stress (SMYS) of the pipeline. An example is given for a buried high-pressured natural gas pipeline.	en
heal.publisher	Computational Mechanics Inc, Billerica, MA, United States	en
heal.journalName	International Conference on Structures Under Shock and Impact, SUSI	en
dc.identifier.spage	85	en
dc.identifier.epage	94	en