Chapter
Dec 31, 2015
Laboratory Study on Pervious Core Breakwaters
Authors: Hideo Kondo, Satoshi Tōma, and Kenji YanoAuthor Affiliations
Publication: Coastal Engineering 1976
Abstract
Effects of permeable core layer installed in trapezoidal and rectangular breakwaters have been studied experimentally and analytically. As the materials for armour and core use of the lattice composed of circular cylinders was made in addition to rocks. Perforated plates were also applied as a kind of very thin core.
Expermental results show that the reflected wave heights from breakwater could be reduced considerably by locating the core layer shoreward within it while core thickness controls the transmitted wave heights in the protected water area. Harmonic analysis about the water surface in lattice armour reveals that the second harmonic waves take a pattern of standing wave distribution having a node at the seaward face of breakwater. Thin perforated plates work successfully for reducing the transmitted wave heights when they are installed at the rear face of breakwater.
An analytical approach to predict the transmission and the reflection coefficients is applied for the present experimental data and shown to be useful.
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Published In
Coastal Engineering 1976
Pages: 2643 - 2661
Copyright
© 1977 American Society of Civil Engineers.
History
Published online: Dec 31, 2015
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Authors
Affiliations
Hideo Kondo
Professor
Department of Civil Engineering Muroran Institute of Technology Muroran, 050, Japan
Satoshi Tōma
Assistant Professor
Department of Civil Engineering Muroran Institute of Technology Muroran, 050, Japan
Kenji Yano
Research Assistant
Department of Civil Engineering Muroran Institute of Technology Muroran, 050, Japan
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