BREAKWATER DAMAGE IN OKUSHIRI PORT DUE TO THE HOKKAIDO NANSEI-OKI EARTHQUAKE TSUNAMI

Proceedings of the International Conference on Coastal Engineering

Yasuyuki Nakagawa¹  Yuzo Mizuno²  Katsutoshi Kimura²  Hirochi Tsuruya¹ 

[1] Port and Harbour Research Institute, Ministry of Transport;Civil Engineering Research Institute, Hokkaido Development Bureau

关键词: breakwater;    breakwater damage;    Okushiri Port;    Kokkaido Nansei-Oki;    earthquake;    tsunami;   

DOI  :  10.9753/icce.v25.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

A tsunami caused by the Hokkaido-Nansei-oki earthquake struck Okushiri Island and the southwest coast of Hokkaido damaging many port facilities. This paper describes typical breakwater damage at Okushiri Port and the applicability of Tanimoto's formula for tsunami wave forces on vertical walls based on prototype failure analyses and the result of numerical simulations. The armor stability and the rubble mound scourings were examined from the results of 3-D model tests at a scale of 1/15. The damage patterns at the narrow opening of breakwaters were reproduced by the tests. The necessary weight of armor blocks and foot-protection blocks for breakwater heads were calculated by the C.E.R.C. formula using averaged flow speed at the peak of tsunami.

【 授权许可】

Unknown