RELATIONSHIPS BETWEEN FLUID MOTION AND PRESSURE VARIATION BY DAM-BREAK FLOWS COLLIDING WITH VERTICAL WALL

  • Natsuki Mizutani
  • Jinji Umeda

Abstract

The 2011 Tohoku Earthquake Tsunami ran up the height of over 40 m and covered over 560 km2 of the coastal land area in Tohoku, Japan. The tsunami destroyed many structures and killed over 15,000 people. Appropriate measures should be taken against the next giant tsunami to avoid such tragedy. The generation mechanism of wave force is uncertain when a tsunami wave running on land collides with a structure. Especially, the fluid motion of a tip of tsunami wave immediately after the collision with a structure is very complicated. The information of the pressure distribution acting on the structure is necessary to construct buildings in the coastal hazard area. The purpose of this study is to clarify the relationships between the fluid motion and pressure variation by a dam-break flow as a tsunami flow on a dry bed colliding with structures.

References

Asakura, R., Iwase, K., Ikeya, T., Takao, M., Fujii, N. and Ohmori, M. (2003): The Tsunami Wave Force Acting on Land Structures, Proc. of 28th ICCE 2002, pp.1191- 1202.

Hayashi, S. & Koshimura, S. (2013): The 2011 Tohoku Tsunami Flow Velocity Estimation by the Aerial Video Analysis and Numerical Modeling, J. Disaster Research, Vol.8(4), pp.561-572.

Ramsden, J.D. & Raichlen, F. (1990): Forces on Vertical Wall Caused by Incident Bores, J. Waterway, Port, Coastal, and Ocean Eng. Vol. 116(5), pp.592-613.

Published
2018-12-30
How to Cite
Mizutani, N., & Umeda, J. (2018). RELATIONSHIPS BETWEEN FLUID MOTION AND PRESSURE VARIATION BY DAM-BREAK FLOWS COLLIDING WITH VERTICAL WALL. Coastal Engineering Proceedings, 1(36), currents.10. https://doi.org/10.9753/icce.v36.currents.10