FAILURE MECHANISM OF KAMAISHI BREAKWATERS DUE TO THE GREAT EAST JAPAN EARTHQUAKE TSUNAMI

Taro Arikawa, Masaharu Sato, Kenichiro Shimosako, Iwao Hasegawa, Gyeong-Seon Yeom, Takashi Tomita

Abstract


Many breakwaters were damaged by the Great East Japan Earthquake of March 11, 2011. The majority of the breakwaters were destroyed or deformed under tsunami overflow; however, the failure mechanism under tsunami overflow is not clear. Therefore, with the main objective of this report being to clarify the stability of breakwaters under tsunami overflow, hydraulic model experiments and numerical simulations were conducted with Kamaishi Bay breakwaters as the subject, and failure mechanisms of the trunk of the breakwaters were examined.

Keywords


Kamaishi breakwater; tsunami overflow; stability of breakwaters

References


Arikawa, T., M. Sato, K. Shimosako, T. Tomita, D. Tatsumi, Y. Gyoeng-Seon, K. Takahashi (2012): Study of the mechanism of tsunami damage to breakwaters at the mouth of Kamaishi Harbor —First report focused on hydraulic properties—, Document of the Port and Airport Research Institute, No. 1251, 52p

Coastal Development Institute of Technology (CDIT): Research and development of the CADMAS-SURF/3D Numerical Wave Flume, Coastal Technology Library, No. 39

Kobayashi, M., M. Terashi, K. Takahashi, K. Nakajima, T. Kotani (1987): New calculation method for riprap mounds, Report by the Port and Airport Research Institute, Vol. 26, No.(1), pp. 371-412.

Takahashi, S., et al. (34)(2011): Early report on the survey of earthquake and tsunami damage to ports, coastlines, and airports by the Great East Japan Earthquake of 2011, Document of the Port and Airport Research Institute, No. 1231, 200p

Tanimoto, K., T. Takayama, K. Murakami, S. Murata, H. Tsuruya, S. Takahashi, M. Morikawa, Y. Yoshimoto, S. Nakano, T. Hiraishi (1983): Brief consideration of the actual state of the Japan Sea Chubu Earthquake Tsunami of 1983, Document of the Port and Airport Research Institute, No. 0470, 200p

Horiguchi, T., M. Yokota (1968): Report on the survey of the Tokachi Offshore Earthquake Tsunami, Proceedings of the 15th Conference on Coastal Engineering, pp. 243-253


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