Sliding and overturning stability of breakwater under combined effect of earthquake and tsunami

Chaudhary, Babloo; Hazarika, Hemanta; Ishibashi, Isao; Abdullah, Amizatulhani

doi:10.1016/j.oceaneng.2017.03.021

Cited by 27 publications

(10 citation statements)

References 22 publications

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“…Coastal structures are hit by both earthquake and tsunami within a small time interval, and may get damaged due to earthquake in addition to tsunami. To the end, Chaudhary et al [7] described the factors which are responsible for failure of breakwater during earthquake and tsunami, and conducted analytical study to determine the stability of breakwater subjected to earthquake and tsunami. Experimental study is also needed to understand the failure process of breakwater foundation during earthquake and tsunami.…”

Section: Breakwater Under Actions Of Earthquake and Tsunamimentioning

confidence: 99%

An Overview on Development of Countermeasures for Breakwater against Earthquake and Tsunami Induced Damage

haudhary¹

2017

RAPSCI

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The compound disaster triggered by earthquake and tsunami imposes devastating damage to structures and human lives living near seacoasts. In past few years, breakwaters (which are used to protect coastal areas from devastating damage of tsunamis) failed during tsunami. It led to enter the tsunami waves into the coastal areas, and created deep devastation there. It was observed that the breakwaters collapsed mainly due to failure of their foundations. Recently, some research works have been done to make breakwater resilient against tsunami induced damaged in order to protect coastal areas from devastating damage of tsunami. This paper mainly reviews some recent studies towards making the breakwater resilient against earthquake and tsunami induced damage

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Section: Breakwater Under Actions Of Earthquake and Tsunamimentioning

confidence: 99%

An Overview on Development of Countermeasures for Breakwater against Earthquake and Tsunami Induced Damage

haudhary¹

2017

RAPSCI

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“…Whereas, settlements and shear failure due to the insufficient bearing capacity are common overall failure shapes occurred in the foundation. The dynamic stability of BRWs during earthquakes and wave impacts was further investigated [19][20][21][22]. The sliding of caisson structures along the rubble mound surface caused by breaking wave loads was investigated using Newmark's method [20].…”

Section: Introductionmentioning

confidence: 99%

“…Their study examined the response of caissons considering the effects of adjacent caisson blocks under the wave impact loading. Furthermore, the sliding and overturning stabilities of caisson blocks under the combined effect of earthquake and tsunami were investigated [22].…”

Section: Introductionmentioning

confidence: 99%

Calibration of Load and Resistance Factors for Breakwater Foundations under the Earthquake Loading

et al. 2021

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This study investigates the system stability of breakwater foundations subjected to earthquakes from a probabilistic point of view. A fully probabilistic approach, i.e., a combination of the Monte Carlo simulation and Bishop’s simplified method, has been developed to evaluate the system failure probability of foundation damage, one of the prevailing failures encountered during earthquakes. Twelve sections of perforated caisson breakwaters located around Korea were chosen as case studies. First, the reliability analysis was performed for all the breakwaters at existing conditions; then, the calibration process involving the estimation of load and resistance factors was conducted for 12 breakwaters at three levels of the target reliability index. As the performance function, used in the stability analysis of breakwater foundations, is defined based on an implicit shape with a high-dimensional space of variables, the calibration process of load and resistance factors becomes cumbersome and complicated. Therefore, this study has proposed a sensitivity analysis to be implemented prior to the calibration process to elicit the effects of variables on the stability of each breakwater, which, thereafter, effectively directs the calibration process. The results of this study indicate that the failures in the foundation of breakwaters frequently occur in different modes. Therefore, the failure probability should be estimated considering all possible failure modes of the foundation. The sensitivity results elucidate that the soil strength parameters are the dominant variables, contributing to the stability of foundations, whereas the seismic coefficient presents the negative effect, causing the insecurity of breakwaters. In particular, the deadweights, though directly contributing to the seismic forces, show a small effect on the stability of foundations. The calibration shows that the load factors slightly vary with an increase in the target reliability index and set 1.10 for three safety levels. In contrast, the resistance factor exhibits an inverse relationship with the specified reliability index. Especially when the load factor equals 1.10, the resistance factors are 0.90, 0.85, and 0.80, corresponding to the reliability index of 2.0, 2.5, and 3.0, respectively. Eventually, it is proved that the sensitivity analysis prior to the calibration process makes the procedure more efficient. Accordingly, the iteration of simulation execution is diminished, and the convergence is quickly accomplished.

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“…The tsunami hit the coastal structures, overflowed, and subsequently destroyed the coastal structures. The tsunami that propagated far landward and devasted its area was due to the destruction of the coastal structure (Chaudhary et al, 2017). Kato et al, 2012;Jayaratne et al, 2016, described the result of a field survey that was carried out following the 2011 tsunami in Japan.…”

Section: Introductionmentioning

confidence: 99%

Design of a Facility for Tsunami Run up Generation to Study Tsunami and Seawall Interaction

Warniyati

Triatmadja

Yuwono

et al. 2019

Journal of the Civil Engineering Forum

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Experimental researches on the tsunami in the laboratory have been conducted using various methods. The use and techniques of tsunami wave generator depend on the objective of the tsunami observation to be conducted. When the objective is the scouring at the downstream of a seawall, the use of a short flume with control discharge seems to be appropriate. A valve with a mechanic controller was equipped to control the discharge from a reservoir into the flume. A numerical simulation of discharge into the flume and the overflow above the seawall was conducted to determine the dimension of the tsunami flume and its generator before construction. The experiments were conducted to simulate the hydrograph of tsunami overflow above the seawall model. The numerical hydrograph is found to be comparable with the experimental hydrograph. This indicates that the tsunami wave generator is capable of simulating tsunami hydrograph and ready for further use of simulations.

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Sliding and overturning stability of breakwater under combined effect of earthquake and tsunami

Cited by 27 publications

References 22 publications

An Overview on Development of Countermeasures for Breakwater against Earthquake and Tsunami Induced Damage

An Overview on Development of Countermeasures for Breakwater against Earthquake and Tsunami Induced Damage

Calibration of Load and Resistance Factors for Breakwater Foundations under the Earthquake Loading

Design of a Facility for Tsunami Run up Generation to Study Tsunami and Seawall Interaction

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