A high-cycle accumulation model for clay and its application to monopile foundations
- A high-cycle accumulation (HCA) model predicting the accumulation of permanent strain or excess pore water pressure in clay under a large number of load cycles is presented. Data from an extensive laboratory testing program on kaolin under undrained cyclic loading has been analysed for that purpose. The influence of strain amplitude, void ratio, stress ratio, overconsolidation ratio and loading frequency on the accumulation rates is considered in the constitutive equations of the HCA model. The proposed model is validated first by the simulation of element tests. Subsequently, its application to offshore wind turbine foundations under long-term lateral cyclic loading is presented by the back-analysis of a centrifuge test on a monopile in soft clay. The results are in good accordance with the measurements in terms of pile displacement and bending moment versus number of applied cycles. It is concluded that the proposed model is feasible to describe the long-term behaviour of clay subjected to high-cyclic loading.
| Author: | Patrick StaubachORCiDGND, Jan MachacekORCiDGND, Merita TafiliORCiDGND, Torsten WichtmannORCiDGND |
|---|---|
| URN: | urn:nbn:de:hbz:294-86931 |
| DOI: | https://doi.org/10.1007/s11440-021-01446-9 |
| Parent Title (English): | Acta geotechnica |
| Publisher: | Springer |
| Place of publication: | Berlin |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2022/03/09 |
| Date of first Publication: | 2022/01/18 |
| Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
| Tag: | AVISA model; Clay; High-cycle accumulation model; High-cyclic loading; Offshore wind turbine foundations |
| Volume: | 17 |
| First Page: | 677 |
| Last Page: | 698 |
| Institutes/Facilities: | Lehrstuhl für Bodenmechanik, Grundbau und Umweltgeotechnik |
| Dewey Decimal Classification: | Technik, Medizin, angewandte Wissenschaften / Ingenieurbau, Umwelttechnik |
| open_access (DINI-Set): | open_access |
| faculties: | Fakultät für Bau- und Umweltingenieurwissenschaften |
| Licence (English): |  Creative Commons - CC BY 4.0 - Attribution 4.0 International |
