Microwave Structural Health Monitoring of the Grouted Connection of a Monopile-Based Offshore Wind Turbine: Fatigue Testing Using a Scaled Laboratory Demonstrator

Figure 3

(a) Gap between the metal tubes with shear keys that is subsequently filled with grout; (b) radar sensor mounted on the outer metallic tube together with the antennas directly coupled to the grout from the top. Additionally, a hydraulic cylinder and other sensors are shown.

(a)

(b)