Damage Curves of the Rigid-Plastic Model by Impact Loads

The safety criteria of the rigid-plastic model of the structures to the impulsive loads are established with the peak-load ratio to the step load and impulse ratio to the ideal impulse producing the critical displacement. It is shown that the impulse and the peak-load of the impulsive loads are the dominant factors for the damage of the structures. It is also shown that the damage curves with the peak-load and impulse ratio are useful method to estimate the damage of the structures due to the emphasis on the equivalent dynamic loads rather than the equivalent static loads in the process of deriving the curve.