This study investigated the fatigue behaviors at the joint of a hybrid steel?concrete wind turbine tower. A fatigue design approach
was proposed for the joint based on CEB-FIP model code 1990 and Eurocode 2. In addition, to estimate the long-term fatigue
performance related to continuous wind changes at the joint, two types of specimens were fabricated and tested. Each specimen
consisted of steel and concrete sections, which were connected with anchor bolts, and they were designed to investigate the effect of
the embedded length of the anchor bolt. Two million cycles of cyclic loading were applied to the specimens, after which a monotonic
static loading was applied to investigate the residual performance of each specimen. The experimental results demonstrate that the
joint of a hybrid steel?concrete wind turbine tower designed using the proposed approach retained sufficient fatigue performance.
Thus, this approach can be effective for fatigue design of the joint.