Optimal Maintenance Policies of Wave-Dissipating Blocks using Cumulative Damage Model  
Author Yunlong Dong


Co-Author(s) Takahiro Nakamura; Kodo Ito; Yoshiyuki Higuchi


Abstract Because the scale is massive, local government maintenance budgets are tight, and the number of skilled maintenance employees is declining, the social infrastructure must be maintained economically and efficiently. For inexpensive and efficient maintenance, optimal policies that take into account the characteristics of social infrastructure maintenance are required. We developed such optimal maintenance strategies using the cumulative damage model and applied them to the solution of a real-world breakwater problem in a port on the Sea of Japan. Although it is well known that the deterioration of breakwaters follows the Weibull distribution, calculating optimal maintenance policies is difficult because maintenance models contain Stieltjes convolutions of functions. The approximation formula of convolution of the Weibull distribution is used to solve this problem, and the optimum policies are achieved. We can prove that the actual policies which are implemented by local governments are reasonable by comparing them with mathematical calculated results.


Keywords Coastal protection, natural disasters, maintenance, optimal policy, cumulative damage model
    Article #:  RQD28-95

Proceedings of 28th ISSAT International Conference on Reliability & Quality in Design
August 3-5, 2023