Development of optimum repair model for coastal structures that consist of wave-dissipating blocks

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420524
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Hydraulic engineering
• Research Institution: Tottori University
• Principal Investigator: OTA TAKAO 鳥取大学, 工学(系)研究科(研究院), 准教授 (70233129)
• Co-Investigator(Kenkyū-buntansha): SATOW Takashi 神戸学院大学, 共通教育センター, 准教授 (30304405)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 消波ブロック被覆堤 / マルコフ連鎖モデル / 被災進行予測 / 補修

Outline of Final Research Achievements

Based on the experimental results for profile change of wave-dissipating blocks covering a caisson breakwater, the model profiles for the damaged block layer are made and the relation between the damage progression and change of performance is investigated. The results of the numerical experiment using the model profiles show that the overtopping rate increases by a factor of 1.5 compared to that of the initial profile with damage progression. Furthermore a statistical model based on the Markov chain is applied to the damage progression process and the total cost for the maintenance of wave-dissipating blocks is estimated by using an assumed repair cost and loss. This method can be applied to find a policy of repair that minimizes the total (life cycle) cost and some numerical results are obtained.

Free Research Field

海岸工学