Coastal Structures and Solutions to Coastal Disasters Joint Conference 2015
Dynamic Behaviour of a Flexible Membrane Tsunami Barrier with Dyneema
Publication: Coastal Structures and Solutions to Coastal Disasters 2015: Tsunamis
ABSTRACT
Proof-of-concept model tests on a novel self-deploying on-shore tsunami barrier were executed. The tsunami barrier consists of a membrane, floater, and cables that are stored underground. Due to buoyancy the barrier self-deploys when struck by a tsunami. The membrane and cables consist of the strong, flexible, and light-weight material Dyneema that can resist a 20 m high water column. A novel tsunami generating method was applied to generate a high-velocity initial bore, followed by a long duration high water level, using a normal piston type wave maker in a wave flume. Numerical calculations using a numerical volume-of-fluid code were used to tune the tsunami generation. The tests showed that the tsunami barrier indeed automatically deployed and completely blocked a 19 m high (reflected) tsunami for bore velocities up to 7.5 m/s. For higher bore velocities the barrier still deployed. For larger tsunamis (with a 33 m reflected water depth) the barrier remained erected, although overflow evidently occurred.
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Published In
Coastal Structures and Solutions to Coastal Disasters 2015: Tsunamis
Pages: 235 - 245
Editors: Louise Wallendorf, U.S. Naval Academy and Daniel T. Cox, Ph.D., Oregon State University
ISBN (Online): 978-0-7844-8031-1
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© 2017 American Society of Civil Engineers.
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Published online: Jul 11, 2017
Published in print: Jul 11, 2017
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