Details
| Original language | English |
|---|---|
| Title of host publication | Offshore Site Investigation Geotechnics 9th International Conference Proceeding |
| Pages | 1781-1788 |
| Number of pages | 8 |
| Publication status | Published - 2023 |
| Event | 9th International Conference on Innovative Geotechnologies for Energy Transition, 2023 - London, United Kingdom (UK) Duration: 12 Sept 2023 → 14 Sept 2023 |
Publication series
| Name | Offshore Site Investigation and Geotechnics |
|---|---|
| ISSN (Print) | 2754-6322 |
Abstract
In regions not suited for monopile structures, jacket structures with suction-installed foundations can be an economic alternative. These suction caissons are mainly loaded by axial loads. Yet the load-bearing behaviour under cyclic loads is not well understood. Therefore, tests on a small-scale suction caisson (D=0.6m, L/D=1) in fine, densely packed sand were carried out. Installation was done by a succession of jacking and suction in order to obtain realistic yet reproducible initial soil conditions. In each test, the caisson was loaded with 5000 cycles of alternating or swell-loads. The results show in which way mean load and load amplitude affect the behaviour: With increasing number of cycles, the load amplitude becomes the predominant factor causing further displacements. A hydraulic-mechanical coupled finite element model was established. Back-calculations of the model tests highlight the challenges but also the importance to incorporate behaviour under tensile and compressive loads into a single numerical model.
ASJC Scopus subject areas
- Engineering(all)
- Ocean Engineering
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Offshore Site Investigation Geotechnics 9th International Conference Proceeding. 2023. p. 1781-1788 (Offshore Site Investigation and Geotechnics).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - On the behaviour of suction caissons under cyclic axial loading
AU - Sanders, I.
AU - Achmus, M.
N1 - Publisher Copyright: © 2023, Society for Underwater Technology. All rights reserved.
PY - 2023
Y1 - 2023
N2 - In regions not suited for monopile structures, jacket structures with suction-installed foundations can be an economic alternative. These suction caissons are mainly loaded by axial loads. Yet the load-bearing behaviour under cyclic loads is not well understood. Therefore, tests on a small-scale suction caisson (D=0.6m, L/D=1) in fine, densely packed sand were carried out. Installation was done by a succession of jacking and suction in order to obtain realistic yet reproducible initial soil conditions. In each test, the caisson was loaded with 5000 cycles of alternating or swell-loads. The results show in which way mean load and load amplitude affect the behaviour: With increasing number of cycles, the load amplitude becomes the predominant factor causing further displacements. A hydraulic-mechanical coupled finite element model was established. Back-calculations of the model tests highlight the challenges but also the importance to incorporate behaviour under tensile and compressive loads into a single numerical model.
AB - In regions not suited for monopile structures, jacket structures with suction-installed foundations can be an economic alternative. These suction caissons are mainly loaded by axial loads. Yet the load-bearing behaviour under cyclic loads is not well understood. Therefore, tests on a small-scale suction caisson (D=0.6m, L/D=1) in fine, densely packed sand were carried out. Installation was done by a succession of jacking and suction in order to obtain realistic yet reproducible initial soil conditions. In each test, the caisson was loaded with 5000 cycles of alternating or swell-loads. The results show in which way mean load and load amplitude affect the behaviour: With increasing number of cycles, the load amplitude becomes the predominant factor causing further displacements. A hydraulic-mechanical coupled finite element model was established. Back-calculations of the model tests highlight the challenges but also the importance to incorporate behaviour under tensile and compressive loads into a single numerical model.
UR - http://www.scopus.com/inward/record.url?scp=85207957759&partnerID=8YFLogxK
U2 - 10.3723/dkkk3850
DO - 10.3723/dkkk3850
M3 - Conference contribution
AN - SCOPUS:85207957759
SN - 9780906940594
T3 - Offshore Site Investigation and Geotechnics
SP - 1781
EP - 1788
BT - Offshore Site Investigation Geotechnics 9th International Conference Proceeding
T2 - 9th International Conference on Innovative Geotechnologies for Energy Transition, 2023
Y2 - 12 September 2023 through 14 September 2023
ER -