Breakwater subjected to tsunami–impact: Physical modelling of geotechnical phenomena
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Date
2022-08
Publication Type
Journal Article
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yes
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Abstract
As dramatically demonstrated by the failure of Tsunami-resistant breakwaters during the 2011 Tohoku earthquake, the behavior of structures subjected to Tsunami-impact is not fully understood. This paper studies experimentally the behavior of a simplified breakwater subjected to Tsunami-impact using a novel Miniaturized Tidal Generator (MTG). The response is monitored through a combination of image analysis and a unique instrumented-breakwater that allows direct measurement of the developing forces. Experiments reveal strong coupling between the scour-feature, the hydrodynamic forces acting on the breakwater, and its mechanical behavior. Upon overtopping, a plane-jet of water falling at an inclined trajectory results in progressive undermining of the foundation. Measurements reveal that the commonly assumed simple sliding-type failure on level-ground is difficult to promote. The failure mechanism consists of combined (VHM) bearing capacity failure due to combination of loss of support, hydrodynamic loading, and buoyancy effects.
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published
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Journal / series
Volume
159
Pages / Article No.
107344
Publisher
Elsevier
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Edition / version
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Software
Geographic location
Date collected
Date created
Subject
Tsunami; Scour; Physical modelling; PIV; Natural hazards
Organisational unit
09569 - Anastasopoulos, Ioannis / Anastasopoulos, Ioannis
02607 - Institut für Geotechnik / Institute for Geotechnical Engineering