IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Image-based methods for assessing the breakwater blocks movements
Image-based methods for assessing the breakwater blocks movements
Author : VANESSA FERRAZ (1), RITA F.CARVALHO (2), JORGE LEANDRO (2,3), RUTE LEMOS (4) & JUANA FORTES (4)
ABSTRACT
Rubble-mound breakwaters often need regular upgrading and maintenance during lifetime. Scale model tests are many
times required to evaluate hydraulic and structural behaviour of the proposed design. Stability and overtopping of
breakwaters are examples where physical model tests are often chosen. Nevertheless, damage assessment depends
often of a trained technician in order to properly identify motion and removed armour units (natural or artificial blocks) from
the armour layer.
In this work, we develop an image-based method using Matlab® to identify and characterize breakwater armour units
motion induced by irregular waves during scale model tests. Different methodologies were tested and compared using
three different types of armour units.
With a proposed methodology of image analysis, it was possible to make an accurate monitoring of the structure during the
entire test, to identify motions, to locate them in space and time, and to characterize the selected motion by calculating
displacement and rotation.
File Size : 1,667,308 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 13/08/2015
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