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Ali Kordzadeh Kermani

PhD Researcher
Dept. of Civil, Structural & Environmental Engineering

Email: kordzada@tcd.ie

 

Model Studies on Caisson Supported Monopiles under Long-term Monotonic and Cyclic Lateral Loads

Keywords: Hybrid monopile footings, offshore wind turbine foundations, laterally loaded piles, skirted foundations.

 

The increasing concern for the environment has required implementation and utilization of larger and more efficient offshore wind turbines as a promising source of clean and renewable energy. However, as wind turbines grow in size and enter deeper waters, design and installation of foundations of such structures becomes more challengeable for engineers.

 

Monopiles and suction buckets, known to be the most common and economical solution for fixed foundations of the offshore turbines are capable of carrying environmental loads up to certain water depths according to their specific design. In deeper water depths either fixed jacket structures or novel floating foundations are common and available solutions to support the superstructure. Although, both types of deep water foundations have been widely used in the oil and gas industry, implementation of such foundations in the offshore wind industry is not considered as cost-efficient as monopiles and caissons.

 

Unlike floating foundations, little is done to provide innovative fixed offshore solutions for foundations of wind turbines in deep water depths. A new type of foundation known as hybrid foundation is recently introduced which comprises a monopile supported by a skirt footing. Adding a surrounding caisson rested on seabed to a monopile increases the load carrying capacity and hence efficiency of the foundation system. This project intends to investigate the complex behaviour of hybrid foundations under monotonic and cyclic lateral loads to get a better understanding of behaviour of such foundations under environmental loads.

 

Project Supervisor: Associate Prof. Brendan O’Kelly