Relevant factors for the liquefaction susceptibility of cyclically loaded offshore monopiles in sand
- The offshore foundations may exhibit a relatively high liquefaction susceptibility due to the full saturation of the porous seabed and the cyclic nature of the typical offshore loads. Here, the particular relevance of some of the main factors that affect the liquefaction susceptibility of an offshore monopile will be addressed, focusing on the possibility of a progressive accumulation of residual pore water pressure within the saturated soil around a monopile under cyclic lateral loading. The discussion is based on numerical results obtained with a coupled FE model of the offshore foundation which includes the Biot-Zienkiewicz u-p model. A constitutive model of the Generalized Plasticity type has been used for the soil in order to reproduce important features of its behaviour under cyclic loading. This paper presents the findings derived from a parametric study of the problem and shows that the accumulation of residual pore pressure can produce significant changes of the pile'sThe offshore foundations may exhibit a relatively high liquefaction susceptibility due to the full saturation of the porous seabed and the cyclic nature of the typical offshore loads. Here, the particular relevance of some of the main factors that affect the liquefaction susceptibility of an offshore monopile will be addressed, focusing on the possibility of a progressive accumulation of residual pore water pressure within the saturated soil around a monopile under cyclic lateral loading. The discussion is based on numerical results obtained with a coupled FE model of the offshore foundation which includes the Biot-Zienkiewicz u-p model. A constitutive model of the Generalized Plasticity type has been used for the soil in order to reproduce important features of its behaviour under cyclic loading. This paper presents the findings derived from a parametric study of the problem and shows that the accumulation of residual pore pressure can produce significant changes of the pile's behaviour under external loading. The paper also investigates the effects caused by the loading from a realistic storm of moderate magnitude and the consequential transient degradation of the foundation's stiffness.…
Autor*innen: | Pablo Cuéllar, Matthias BaeßlerORCiD, Werner Rücker |
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Dokumenttyp: | Beitrag zu einem Tagungsband |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Poromechanics V - 5th Biot conference on poromechanics (Proceedings) |
Jahr der Erstveröffentlichung: | 2013 |
Herausgeber (Institution): | American Society of Civil Engineers (ASCE) |
Erste Seite: | 1336 |
Letzte Seite: | 1345 |
Freie Schlagwörter: | Cyclic loads; Offshore structures; Piles; Sand (hydraulic); Soil liquefaction |
Veranstaltung: | Poromechanics V - 5th Biot conference on poromechanics |
Veranstaltungsort: | Vienna, Austria |
Beginndatum der Veranstaltung: | 2013-07-10 |
Enddatum der Veranstaltung: | 2013-07-12 |
DOI: | 10.1061/9780784412992.160 |
ISBN: | 978-0-7844-1299-2 |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Datum der Freischaltung: | 20.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 05.08.2013 |