Mitigation Effect of Vertical Walls on a Wharf Model Subjected to Tsunami Bores

Cheng Chen, Bruce W. Melville, N. A.K. Nandasena, Asaad Y. Shamseldin, Liam Wotherspoon

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

An experimental study was carried out to investigate the mitigation effect of vertical walls on a wharf model subjected to tsunami bores. Dam-break waves were generated in a flume to simulate tsunami bore propagation, the bore characteristics were observed, and the tsunami pressures on vertical walls and a wharf model were measured. Results indicate different characteristics for bores traveling on wet-bed and dry-bed. The tsunami bore impact on a vertical wall was shown to exhibit four stages, and the time-history of the pressure exhibits three phases accordingly. Based on the law of conservation of energy, an equation for estimating the pressure exerted on the mid-point of the wall was proposed with coefficient of 1.8-2.4, and found to be suitable in this experimental range. Based on experimental data, an equation of the mitigation effect of vertical walls on tsunami was proposed as a function of the inundation depth, the wall height and the deck height. The predicted values from the equation are generally within ±20% of the measured values.

Original languageEnglish
Article number1750004
JournalJournal of Earthquake and Tsunami
Volume11
Issue number3
DOIs
Publication statusPublished - Sep 1 2017
Externally publishedYes

Keywords

  • mitigation effect
  • pressure
  • Tsunami bore
  • vertical wall
  • wharf model

ASJC Scopus subject areas

  • Oceanography
  • Geotechnical Engineering and Engineering Geology
  • Geophysics

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