2020 Volume 76 Issue 2 Pages I_531-I_541
This study proposed a methodology for optimal design of protection structures against rockfall based on minimization of the total cost (the construction cost of protection structures + the risk). The risk is defined as the product of the probability of damage due to rockfall and the consequence. The probability of damage was calculated rockfall hazard assessment method based on collision energy. The consequence was evaluated based on human life loss and economic loss due to traffic interruption. It is not practical to determine an optimal placement only from total cost because usually there are some budget constraints. Therefore, the proposed method determinines an optimal placement of protection structure solving optimization problem based on linear pragramming with constaraint, so that it can satisfy a given budget construction cost. We applied the proposed method to the actual slope shape and show examples of optimal placement of rockfall protection structures.
