abstract
Article history:
Received 27 July 2015
Received in revised form 23 October 2015
Accepted 10 December 2015
Available online xxxx
The 2004 Indian Ocean tsunami and the recent 2011 Japan tsunami have highlighted the need to investigate the
interaction between tsunamis and coastal structures. Although some efforts have been made to determine tsunami
loads on structures, there are discrepancies between the limited number of published design guidelines. This
study comprises an experimental investigation of a tsunami bore interaction with an inland structure. Physical
modelling of the tsunami bore in the laboratory allowed study of the impact of tsunami bores on a square
prism model having different orientations to the flow direction. The use of common geometrical shapes
simplifies experiments and increases the reliability of results. The experiments were conducted in a 14 m long,
1.2 m wide and 0.8 m deep wave flume equipped with an automatic gate designed to generate a tsunami bore.
Measurements were made of the forces and pressures exerted on the model structure and of the bore heights
and velocities. The vertical pressure distribution was measured on what was initially the structure's front wall,
with the front wall at 0°, 30°, 45°, 60°, 90° and 135° to its original alignment. A relation between bore velocity
and bore height is presented. The measured maximum forces in the stream-wise and upward directions were numerically
modelled successfully, and relevant drag coefficients were determined for the structure at different
orientations.
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