Work Package 4 : Design Methods

Monopiles are submitted to axial and horizontal cyclic loads during their service life. Dimensions of the foundation depend on the design method, in order to optimize the cost of it a reliable method should be used to di the design.

Experimental and numerical data from all work packages will help to better understand the behavior of a monopile under cyclic load. This information will allow developing a reliable method to that takes into account the complexity of the soil response mechanism.

Experimental and numerical data from all work packages will help to better understand the behavior of a monopile under cyclic load. This work package has two main objectives:

  1. Develop a tool capable of predicting the displacements and efforts in the monopile when applying a cyclic load and;
  2. Validate this tool through experimental data.
Monopile dimensioning methods

Using SOLCYP data based on in-situ tests, a new dimensioning method considering t-z curves will be developed, for piles under axial cyclic load. Data from SOLCYP+ tests will help developpe a constitutive model to take into account the resistance degradation due to transversal cyclic load, a new model of “p-y” curves will be developed.

In order to understand the pile’s behavior on chalk soil, a numerical model and simple tools capable of representing the behavior of a pile under axial and lateral load will be developed. These tools will be recommended to be used by engineers for dimensioning piles in chalk.

To finish this work package a practical case will be performed, the developed methods will be compared with methods from current standards.

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