An Experimental Study of the Submerged Breakwater Stability and Risk Analysis

• Main Authors: Lin, Jia-Shiang, 林嘉向
• Other Authors: Huang, Chai-Cheng; Tseng, Ruo-Shan
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/86039545910957766939

碩士 === 國立中山大學 === 海洋資源學系 === 84 === The major safety factor of submerged breakwaters is whether the stability of the armor layer has been designed properly. Even up-to-date, there are many engineering companies still use Hudson formula to estimate the required weight of an armor unit, but the stability coefficient of Hudson formula should be decided by model tests. Using this formula directly may result in underestimation or overestimation of unit weight of stability, and thus cost-inefficiency or failure of the structure. This study includes two major parts. (1)The stability of armor layer of submerged breakwaters was tested with regular waves. It has shown that the required weight of an armor unit is strongly related to the ratio of submerged depth and wave height; then the slope of submerged breakwaters; and then the surf similarity parameter; while, it is almost irrelevant to the width of the crest. (2)A risk analysis of submerged breakwaters was evaluated, on the basis of wave statistics and the results of damage physical model. It has shown that both Gumble''s and Weibull''s distributions are good for significant wave height distribution of local typhoon, and that if the armor weight obtained from the design curves of stability, the risk of damage will be less than 2% in 50 years.