Offshore pipelines crossing active seismic faults

Τριμιντζίου, Μαρία; Trimintziou, Maria

dc.contributor.author	Τριμιντζίου, Μαρία	el
dc.contributor.author	Trimintziou, Maria	en
dc.date.accessioned	2016-06-30T09:30:46Z
dc.date.available	2016-06-30T09:30:46Z
dc.date.issued	2016-06-30
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/42912
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.5046
dc.rights	Default License
dc.subject	Active faults	el
dc.subject	Offshore geohazards	el
dc.subject	Offshore pipelines	el
dc.subject	Pipeline crossing fault	el
dc.subject	pipeline under fault rupture	el
dc.subject	Αγωγός σε διασταύρωση με ρήγμα	el
dc.subject	Ενεργά σεισμικά ρήγματα	el
dc.subject	Εντατική κατάσταση υποθαλάσσιου αγωγού	el
dc.subject	Θαλάσσιοι γεωκίνδυνοι	el
dc.subject	Υποθαλάσσιοι αγωγοί	el
dc.title	Offshore pipelines crossing active seismic faults	en
heal.type	masterThesis
heal.classification	Underwater pipelines	en
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85139626
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2015-11
heal.abstract	Nowadays, the exploitation of hydrocarbons reserves in deep seas and oceans, in combination with the need to transport hydrocarbons among countries, has made the design, construction and operation of offshore pipelines very significant. Under this perspective, it is evident that many more offshore pipelines are expected to be constructed in the near future and in particular in the wider Mediterranean region. Given the fact that offshore pipelines are crossing extended areas, they may face a variety of geo-hazards that cause substantial permanent ground deformations and potentially threaten the integrity of the pipeline. The present study focuses on the impact of permanent ground deformations induced by active seismic faults on offshore pipelines. For this purpose, a numerical simulation (through finite-element modeling and strain-based criteria) is made, in order to study the distress of offshore pipelines subjected to PGDs induced by active normal and reverse seismic faults at the seabed. Factors, such as the geometrical properties of the fault, the mechanical properties of the ruptured soil formations, and the pipeline characteristics, are examined. Beginning with an extended introduction to the subject, by presenting some general aspects of offshore pipelines and marine geo-hazards, the problem under investigation and the motivation of the study are explained. Subsequently the geo-hazard of seismic faults is further analyzed as well as the special seismic characteristics of the Mediterranean region. After a literature review on similar researches, a validation of the numerical model, developed in the present study, is performed, through the comparison of the numerical results with the analytical predictions of another study. Having validated the numerical model, a range of critical parameters is examined and their impact on the pipeline is presented. After some interesting conclusions regarding the seismic vulnerability of offshore pipelines, potential cost-effective mitigation measures are proposed taking into account constructability issues.	en
heal.sponsor	IKY - “Fellowships of excellence for postgraduate studies in Greece – Siemens program”	en
heal.advisorName	Σακελλαρίου, Μιχαήλ	en
heal.advisorName	Ψαρρόπουλος, Πρόδρομος	el
heal.committeeMemberName	Μαυράκος, Σπυρίδων	en
heal.committeeMemberName	Χατζηγεωργίου, Ιωάννης	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών	el
heal.academicPublisherID	ntua
heal.fullTextAvailability	true