A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Experimental Study on Tsunami Characteristics Flowing over Coastal Dikes with Different Shapes
Lessons from the 2011 Tohoku Earthquake Tsunami disaster highlighted the importance of stable coastal dikes against overflowing tsunami. While a dike with sloping faces may enhance such stability, it may weaken dike’s function to reduce the overflow. This study carried out laboratory experiments to investigate how sloping faces of the dike affect the overflow characteristics. Through the experiment, we found: (i) sloping faces on both side of the dike clearly increase the overflow rate and the fluid force of the inundating flow and bring forward the arrival time of the first runup flow; (ii) sloping front face is the dominant factor to increase the overflow rate; (iii) a vertical wall type dike has the best ability in reduction of the overflow. These findings suggest that designs of optimum dikes need to account for such trade-off relationship between stability and damage-reduction effects of dikes.
Experimental Study on Tsunami Characteristics Flowing over Coastal Dikes with Different Shapes
Lessons from the 2011 Tohoku Earthquake Tsunami disaster highlighted the importance of stable coastal dikes against overflowing tsunami. While a dike with sloping faces may enhance such stability, it may weaken dike’s function to reduce the overflow. This study carried out laboratory experiments to investigate how sloping faces of the dike affect the overflow characteristics. Through the experiment, we found: (i) sloping faces on both side of the dike clearly increase the overflow rate and the fluid force of the inundating flow and bring forward the arrival time of the first runup flow; (ii) sloping front face is the dominant factor to increase the overflow rate; (iii) a vertical wall type dike has the best ability in reduction of the overflow. These findings suggest that designs of optimum dikes need to account for such trade-off relationship between stability and damage-reduction effects of dikes.
Experimental Study on Tsunami Characteristics Flowing over Coastal Dikes with Different Shapes
Seto, Shota (author) / Tajima, Yoshimitsu (author) / Shimozono, Takenori (author) / Nakao, Hideyuki (author)
Coastal Structures and Solutions to Coastal Disasters Joint Conference 2015 ; 2015 ; Boston, Massachusetts
2017-07-11
Conference paper
Electronic Resource
English
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