Details

Autor(en) / Beteiligte

• Goseberg, N.
• Stolle, J.
• Nistor, I.
• Shibayama, T.

Titel

Experimental analysis of debris motion due the obstruction from fixed obstacles in tsunami-like flow conditions

Ist Teil von

• Coastal engineering (Amsterdam), 2016-12, Vol.118, p.35-49

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Experimental research was conducted focusing on debris motion over a horizontal apron featuring vertical obstacles in the path of the debris propagation. The apron was designed as a typical representation of a harbor threatened by an inundating tsunami. The experimental setup idealized often complex harbor settings. The debris was a scaled-down 20-foot shipping container modelled at a 1 in 40 Froude length scale. Offand onshore regions were separated by a vertical quay wall which allowed the incoming elongated solitary wave used to represent the first part of a tsunami to steepen, break and propagate over the initially dry surface as a tsunami-like bore. In the path of propagation, a varying number of debris were entrained within the inundating bore over the horizontal apron. The entrained debris interacted with regularly spaced vertical obstacles representing infrastructure and houses within the propagation path. Varying debris and obstacle arrangements were tested to evaluate the effects the obstacles would have on the debris' maximum longitudinal displacement and the spreading angle. The main conclusion is that the spreading angle of the debris is not as significantly altered by the presence of obstacles on the harbor apron whereas the maximum longitudinal displacement of the debris was significantly affected. •Entrainment and transport of floating debris over a horizontal apron are investigated.•Hydrodynamics of the incoming elongated solitary wave in deep water and over the apron is described.•Maximum longitudinal displacement is reduced in the presence of fixed obstacles.•Spreading angle of debris is however only little altered through fixed obstacles.•Inertial forces on the floating debris as a result of inter-debris and fixed obstacle collision are reported.