Stability of wave-dissipating concrete blocks of deached breakwaters against tsunami

Minoru Hanzawa, Akira Matsumoto, Hitoshi Tanaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

In Japan, detached breakwaters made with wave dissipating concrete blocks such as Tetrapods have been widely applied, but the effectiveness of such kinds of detached breakwaters on tsunami disaster prevention and stability of the structure have not been discussed in detail. Only few studies on wave run-up reduction were done after Nihonkai Chubu Earthquake Tsunami in 1983. In order to mitigate tsunami disasters in sea coast areas, the effectiveness of detached breakwaters and the stability of wave-dissipating concrete blocks should be properly evaluated. Authors has just studied on the effectiveness of detached breakwater on wave run-up reduction and wave pressure reduction on the seawall taking actually possible damage to detached breakwaters into account (Hanzawa et al., 2011). In this particular study, the hydraulic model tests have been systematically and carefully carried out to discuss the stability of wave-dissipating blocks of detached breakwater against solitary tsunami waves. Tetrapods of rear side of the breakwater tends to be damaged like land slide. The damage by tsunami is bigger than that by ordinary wind waves. A countermeasure for improving the stability is also proposed based on the damage process of detached breakwater.

Original languageEnglish
Title of host publicationProceedings of the 33rd International Conference on Coastal Engineering 2012, ICCE 2012
Publication statusPublished - 2012
Event33rd International Conference on Coastal Engineering 2012, ICCE 2012 - Santander, Spain
Duration: 2012 Jul 12012 Jul 6

Publication series

NameProceedings of the Coastal Engineering Conference

Other

Other33rd International Conference on Coastal Engineering 2012, ICCE 2012
CountrySpain
CitySantander
Period12/7/112/7/6

Keywords

  • Coastal Structures
  • Tsunami
  • Wave-dissipating Concrete Block

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Ocean Engineering
  • Oceanography

Fingerprint Dive into the research topics of 'Stability of wave-dissipating concrete blocks of deached breakwaters against tsunami'. Together they form a unique fingerprint.

  • Cite this

    Hanzawa, M., Matsumoto, A., & Tanaka, H. (2012). Stability of wave-dissipating concrete blocks of deached breakwaters against tsunami. In Proceedings of the 33rd International Conference on Coastal Engineering 2012, ICCE 2012 (Proceedings of the Coastal Engineering Conference).