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Physical modelling of monopile foundations under variable cyclic lateral loading
| Content Provider | Scilit |
|---|---|
| Author | Richards, I. A. Byrne, B. W. Houlsby, G. T. |
| Copyright Year | 2018 |
| Description | Book Name: Physical Modelling in Geotechnics |
| Abstract | Monopile foundations supporting offshore wind turbines experience cyclic lateral loading due to wind, waves and turbine operation. This loading varies in amplitude, frequency and direction. Understanding and predicting the monopile’s response to cyclic lateral loading is necessary for optimised design, as it can lead to permanent foundation rotation and evolution of the foundation’s dynamic response. This paper describes new laboratory apparatus designed to perform computer-controlled cyclic load tests on model-scale monopiles. Two perpendicular electric actuators facilitate multi-directional loading, with the apparatus capable of applying loads that continuously vary in amplitude, frequency and direction. Resolution of the instrumentation is also sufficient to capture the response, including accumulation of ratcheting rotation, at low loads. Results in cohesionless soil demonstrate the capabilities of the new apparatus, begin to reveal the monopile’s response to variable cyclic loading, and will allow validation of a recently developed design method for monopiles under cyclic lateral loading. Monopile foundations supporting offshore wind turbines experience cyclic lateral loading due to wind, waves and turbine operation. This loading varies in amplitude, frequency and direction. Understanding and predicting the monopile's response to cyclic lateral loading is necessary for optimised design, as it can lead to permanent foundation rotation and evolution of the foundation's dynamic response. The chapter describes new laboratory apparatus designed to perform computer-controlled cyclic load tests on model-scale monopiles. Two perpendicular electric actuators facilitate multi-directional loading, with the apparatus capable of applying loads that continuously vary in amplitude, frequency and direction. If model-scale results are to appropriately inform full-scale design, rigorous consideration of scaling is essential. A series of monotonic and cyclic commissioning tests were performed to check the operation of the new apparatus and LabVIEW application. Associated hardware includes a Compact data acquisition system for data acquisition and signal conditioning and a Zaber X-MCB2 controller which communicates with both actuators via USB. |
| Related Links | https://content.taylorfrancis.com/books/download?dac=C2018-0-86959-9&isbn=9780429438660&doi=10.1201/9780429438660-111&format=pdf |
| Ending Page | 741 |
| Page Count | 5 |
| Starting Page | 737 |
| DOI | 10.1201/9780429438660-111 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2018-07-11 |
| Access Restriction | Open |
| Subject Keyword | Book Name: Physical Modelling in Geotechnics Marine Engineering Frequency and Direction Varies in Amplitude |
| Content Type | Text |
| Resource Type | Chapter |
