Abstract
To elucidate the dynamic behavior of rockfall prevention structure by impact of a rock fall, a numerical analysis method is developed combining Distinct Element Method and Finite Element Method. The verification of this method has been done by comparison with the experimental results. The relations between falling height, mass of rock, duration of impact and eigen period of structure have become clear on the basis of numerical results under various impact conditions by rock falls. The characteristics and the ratio of finally transmitted energy to the structure also have become clear. Furthermore, a relatively simple method to estimate the ratio of transmitted energy to the rock fall preventive structure and the impact load have been suggested.
