Mitigation of earthquake-induced damage of breakwater by geogrid-reinforced foundation

Babloo Chaudhary, Hemanta Hazarika, Akira Murakami, Kazunori Fujisawa

研究成果: ジャーナルへの寄稿学術誌査読

6 被引用数 (Scopus)

抄録

A strong earthquake often precedes a tsunami, and a breakwater may settle during the earthquake. Such seismic subsidence of the breakwater may reduce its ability to block the tsunami, and the tsunami may easily enter coastal areas by overflowing it. This study deals with the instability of a breakwater due to an earthquake. In addition, to protect a breakwater from damage caused by an earthquake, a new concept of using geogrid for reinforcing the foundation of a breakwater is introduced. To determine the behavior of unreinforced foundation and to evaluate the effectiveness of the proposed reinforced foundation under different earthquake loadings, a series of shaking table tests were performed. It was observed that the earthquake generated excess pore water pressures and deformations of foundation ground were main reasons of failure of the breakwater. The reinforced foundation was found effective to reduce the earthquake-induced damage of the breakwater, and finally it makes the breakwater resilient against earthquake-induced forces. Numerical simulations were also performed to elucidate the mechanism of reinforcement–breakwater–soil–water system under different earthquake loadings.

本文言語英語
ページ(範囲)827-840
ページ数14
ジャーナルMarine Georesources and Geotechnology
36
7
DOI
出版ステータス出版済み - 10月 3 2018

!!!All Science Journal Classification (ASJC) codes

  • 海洋学
  • 地盤工学および土木地質学
  • 海洋工学

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