Besides, the behaviour of plastic hinge at the member end of RC frame in process of loading is discussed and the empirical formula for calculating the equivalent length of plastic hinge is also given.

Simulation results reveal that equivalent rotational inertia, damping factor, fluctuating loading pressure and loading torque has comparatively large influence on control properties.

Taking into account of the effect of loading history, a new nonlinear cumulative damage model is established and the steps to predict remaining fatigue life with the model is given.