Predictive model for scour depth of coastal structure failures due to tsunamis

Ravindra Jayaratne, Adewale Abimbola, Takahito Mikami, Shunya Matsuba, Miguel Esteban, Tomoya Shibayama

研究成果: Conference contribution

8 被引用数 (Scopus)

抄録

Post-tsunami field surveys carried out after the 2011 Great Eastern Japan Earthquake Tsunami revealed that scour around the landward side of concrete sea dikes and seawalls was the most dominant failure mechanism. To better understand this phenomenon, detailed scour data were collected and soil samples from the surveyed locations in Miyagi and Fukushima Prefectures of Japan were comprehensively analysed. Mathematical modeling technique was employed with various combinations of input variables considered in order to determine the effective variables needed to predict the representative scour depth at the leeward of a concrete sea dike or seawall and possible design of these coastal structures against tsunami impact. Parameters such as impact overflowing pressure, height of structure measured at the landward side, inundation height, inundation velocity, angle of landward slope, Darcy's coefficient of permeability and scour depth were found to be the effective parameters essential to generate proposed scour depth predictive model. The results indicate that the hydrodynamic parameters, soil properties and physical geometry of coastal structure play a crucial role in the scour process of such structures. In addition to that, numerical experiments were also performed in order to understand the characteristics of tsunami flow around a typical coastal dike, and to propose preliminary guidelines for structure resilience against future tsunamis.

本文言語English
ホスト出版物のタイトルProceedings of the 34th International Conference on Coastal Engineering, ICCE 2014
編集者Patrick Lynett
出版社American Society of Civil Engineers (ASCE)
ISBN(電子版)9780989661126
出版ステータスPublished - 2014 1月 1
イベント34th International Conference on Coastal Engineering, ICCE 2014 - Seoul, Korea, Republic of
継続期間: 2014 6月 152014 6月 20

出版物シリーズ

名前Proceedings of the Coastal Engineering Conference
2014-January
ISSN(印刷版)0161-3782

Other

Other34th International Conference on Coastal Engineering, ICCE 2014
国/地域Korea, Republic of
CitySeoul
Period14/6/1514/6/20

ASJC Scopus subject areas

  • 土木構造工学
  • 海洋工学
  • 海洋学

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