Centrifuge modelling for stability evaluation of a breakwater foundation subjected to an earthquake and a tsunami

Babloo Chaudhary, Hemanta Hazarika

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Many breakwaters were failed due to the geo-disaster caused by the 2011 off the Pacific Coast of Tohoku Earthquake and Tsunami. Investigations were carried out, and it was found that the breakwater failed mainly due to the failure of its foundation. However, mechanism of the failure of the breakwater has not yet been completely explained. This paper focuses on the stability evaluation of a breakwater foundation subjected to an earthquake and a tsunami. The main feature of the study is application of centrifuge technique for a geo-disaster caused by an earthquake and a tsunami. Results of the study show that in the case of a geo-disaster brought by an earthquake and a tsunami, excessive pore water pressure generated in the sandy ground, and consequently liquefaction occurred during the earthquake. That resulted in deformation of the foundation ground and settlement of the breakwater. During the tsunami, scouring could occur around the harbor side mound, and seepage took place beneath the breakwater. These were the main reasons of decrease in bearing capacity of the foundation ground and failure of the breakwater. Numerical simulations were also performed to make clear the mechanism and behavior of the breakwater under an earthquake and a tsunami. Overall, this study can be useful to understand the failure process of a breakwater under an earthquake and a tsunami, and it can be helpful to develop countermeasures in order to reduce the earthquake and tsunami induced damage of a breakwater in the future.

Original languageEnglish
Pages (from-to)169-181
Number of pages13
JournalOcean Engineering
Volume148
DOIs
Publication statusPublished - Jan 15 2018

Fingerprint

Tsunamis
Breakwaters
Centrifuges
Earthquakes
Disasters
Seepage
Liquefaction
Ports and harbors
Bearing capacity
Coastal zones

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Ocean Engineering

Cite this

Centrifuge modelling for stability evaluation of a breakwater foundation subjected to an earthquake and a tsunami. / Chaudhary, Babloo; Hazarika, Hemanta.

In: Ocean Engineering, Vol. 148, 15.01.2018, p. 169-181.

Research output: Contribution to journalArticle

@article{68fe0198de124fe4841e8db2ddcf3672,
title = "Centrifuge modelling for stability evaluation of a breakwater foundation subjected to an earthquake and a tsunami",
abstract = "Many breakwaters were failed due to the geo-disaster caused by the 2011 off the Pacific Coast of Tohoku Earthquake and Tsunami. Investigations were carried out, and it was found that the breakwater failed mainly due to the failure of its foundation. However, mechanism of the failure of the breakwater has not yet been completely explained. This paper focuses on the stability evaluation of a breakwater foundation subjected to an earthquake and a tsunami. The main feature of the study is application of centrifuge technique for a geo-disaster caused by an earthquake and a tsunami. Results of the study show that in the case of a geo-disaster brought by an earthquake and a tsunami, excessive pore water pressure generated in the sandy ground, and consequently liquefaction occurred during the earthquake. That resulted in deformation of the foundation ground and settlement of the breakwater. During the tsunami, scouring could occur around the harbor side mound, and seepage took place beneath the breakwater. These were the main reasons of decrease in bearing capacity of the foundation ground and failure of the breakwater. Numerical simulations were also performed to make clear the mechanism and behavior of the breakwater under an earthquake and a tsunami. Overall, this study can be useful to understand the failure process of a breakwater under an earthquake and a tsunami, and it can be helpful to develop countermeasures in order to reduce the earthquake and tsunami induced damage of a breakwater in the future.",
author = "Babloo Chaudhary and Hemanta Hazarika",
year = "2018",
month = "1",
day = "15",
doi = "10.1016/j.oceaneng.2017.11.005",
language = "English",
volume = "148",
pages = "169--181",
journal = "Ocean Engineering",
issn = "0029-8018",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Centrifuge modelling for stability evaluation of a breakwater foundation subjected to an earthquake and a tsunami

AU - Chaudhary, Babloo

AU - Hazarika, Hemanta

PY - 2018/1/15

Y1 - 2018/1/15

N2 - Many breakwaters were failed due to the geo-disaster caused by the 2011 off the Pacific Coast of Tohoku Earthquake and Tsunami. Investigations were carried out, and it was found that the breakwater failed mainly due to the failure of its foundation. However, mechanism of the failure of the breakwater has not yet been completely explained. This paper focuses on the stability evaluation of a breakwater foundation subjected to an earthquake and a tsunami. The main feature of the study is application of centrifuge technique for a geo-disaster caused by an earthquake and a tsunami. Results of the study show that in the case of a geo-disaster brought by an earthquake and a tsunami, excessive pore water pressure generated in the sandy ground, and consequently liquefaction occurred during the earthquake. That resulted in deformation of the foundation ground and settlement of the breakwater. During the tsunami, scouring could occur around the harbor side mound, and seepage took place beneath the breakwater. These were the main reasons of decrease in bearing capacity of the foundation ground and failure of the breakwater. Numerical simulations were also performed to make clear the mechanism and behavior of the breakwater under an earthquake and a tsunami. Overall, this study can be useful to understand the failure process of a breakwater under an earthquake and a tsunami, and it can be helpful to develop countermeasures in order to reduce the earthquake and tsunami induced damage of a breakwater in the future.

AB - Many breakwaters were failed due to the geo-disaster caused by the 2011 off the Pacific Coast of Tohoku Earthquake and Tsunami. Investigations were carried out, and it was found that the breakwater failed mainly due to the failure of its foundation. However, mechanism of the failure of the breakwater has not yet been completely explained. This paper focuses on the stability evaluation of a breakwater foundation subjected to an earthquake and a tsunami. The main feature of the study is application of centrifuge technique for a geo-disaster caused by an earthquake and a tsunami. Results of the study show that in the case of a geo-disaster brought by an earthquake and a tsunami, excessive pore water pressure generated in the sandy ground, and consequently liquefaction occurred during the earthquake. That resulted in deformation of the foundation ground and settlement of the breakwater. During the tsunami, scouring could occur around the harbor side mound, and seepage took place beneath the breakwater. These were the main reasons of decrease in bearing capacity of the foundation ground and failure of the breakwater. Numerical simulations were also performed to make clear the mechanism and behavior of the breakwater under an earthquake and a tsunami. Overall, this study can be useful to understand the failure process of a breakwater under an earthquake and a tsunami, and it can be helpful to develop countermeasures in order to reduce the earthquake and tsunami induced damage of a breakwater in the future.

UR - http://www.scopus.com/inward/record.url?scp=85034607323&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85034607323&partnerID=8YFLogxK

U2 - 10.1016/j.oceaneng.2017.11.005

DO - 10.1016/j.oceaneng.2017.11.005

M3 - Article

VL - 148

SP - 169

EP - 181

JO - Ocean Engineering

JF - Ocean Engineering

SN - 0029-8018

ER -