Instability of Composite Breakwater Subjected to Earthquake and Tsunami and Its Countermeasures
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Many breakwaters collapsed during the past earthquakes and subsequent tsunamis mainly due to their foundation failures. However, their failure mechanism has not been well understood. To the end, physical model tests were conducted to understand exact failure mechanism of breakwater subjected to an earthquake and subsequent tsunami. Furthermore, countermeasures are developed for breakwater foundation which can make the breakwater resilient against earthquake and tsunami-induced damage. Gabion and steel sheet piles were used as reinforcing elements for the foundation. Effectiveness of the developed reinforcing model were judge by performing shaking table tests and tsunami overflow tests.
KeywordsBreakwater Foundation Earthquake Tsunami Countermeasures
The authors express gratitude to the Japan Iron and Steel Federation to provide financial support for this study.
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