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Identification of failure pattern in cylindrical grouted connection for wind structures - a pilot study

  • At present, Wind Turbine Generators (WTGs) operating in onshore and offshore wind farms are primary sources of renewable energy around the world. Cylindrical grouted sleeve connections are usually adopted in these WTG structures to connect the upper structure and foundation for ease of installation. These structures including grouted connections experience considerable adverse loading during their lifetimes. Settlements were reported inside similar connections used in energy structures especially oil and gas platforms, which were installed in last three decades. Thus, repair and rehabilitation of such connections in existing wind structures should also be planned ahead to keep them operating in the future. The nature of failure and crack generation in grouted connections are crucial prior to adopt a strengthening strategy. This pilot study is carried out to actualize the failure mechanism in the grouted connection, when subjected to axial loading. A novel reusable scaled cylindricalAt present, Wind Turbine Generators (WTGs) operating in onshore and offshore wind farms are primary sources of renewable energy around the world. Cylindrical grouted sleeve connections are usually adopted in these WTG structures to connect the upper structure and foundation for ease of installation. These structures including grouted connections experience considerable adverse loading during their lifetimes. Settlements were reported inside similar connections used in energy structures especially oil and gas platforms, which were installed in last three decades. Thus, repair and rehabilitation of such connections in existing wind structures should also be planned ahead to keep them operating in the future. The nature of failure and crack generation in grouted connections are crucial prior to adopt a strengthening strategy. This pilot study is carried out to actualize the failure mechanism in the grouted connection, when subjected to axial loading. A novel reusable scaled cylindrical grouted connection with shear keys was designed and tested for its load bearing behaviour. The mechanical test was accompanied by classical measuring techniques (e.g. displacement transducer) as well as non-destructive measuring techniques (e.g. digital image correlation (DIC), acoustic emission analysis (AE)). The failure mechanism incorporating slippage of the shear keys and cracking of the grout was investigated. The capacity and applicability of such test mould were also discussed. The knowledge is expected to pave way towards repair of deteriorated grouted connections with similar geometry and failure pattern.zeige mehrzeige weniger

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Metadaten
Autoren/innen:Md Shamsuddoha, Matthias Baeßler, Götz Hüsken, Stephan Pirskawetz, Hans-Carsten Kühne, Marc Thiele
Persönliche Herausgeber/innen:Ivana Banjad Pecur, Ana Baricevic, Nina Stirmer, Dubravka Bjegovic
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Graue Literatur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Proceedings of the 1st International Conference on Construction Materials for Sustainable Future
Jahr der Erstveröffentlichung:2017
Organisationseinheit der BAM:7 Bauwerkssicherheit
7 Bauwerkssicherheit / 7.1 Baustoffe
7 Bauwerkssicherheit / 7.2 Ingenieurbau
7 Bauwerkssicherheit / 7.4 Baustofftechnologie
Herausgeber (Institution):University of Zagreb, Faculty of Civil Engineering, Zagreb, Croatia
Erste Seite:544
Letzte Seite:551
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Angewandte Physik
Freie Schlagwörter:Acoustic emission analysis; Cracks; Digital image correlation; Failure; Grouted connections; Strengthening strategy
Themenfelder/Aktivitätsfelder der BAM:Energie
Veranstaltung:1st International Conference on Construction Materials for Sustainable Future (CoMS_2017)
Veranstaltungsort:Zadar, Croatia
Beginndatum der Veranstaltung:19.04.2017
Enddatum der Veranstaltung:21.04.2017
ISBN:978-953-8168-04-8
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:25.04.2017
Referierte Publikation:Nein