Searched for: subject%3A%22berms%22
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Lykke Andersen, T. (author), Burcharth, H.F. (author)
Tests have been performed with low steepness and reshaping breakwaters at Ghent University and Aalborg University respectively. The reshaping breakwater is a type of breakwater where the information on overtopping is very limited. The additional tests are described in the following four reports: .. D24 – Part A: Effect of obliqueness, short...
report 2004
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Juhl, J. (author), Archetti, R. (author)
Local scour can occur at a breakwater constructed on a sandy seabed and may endanger the overall stability due to sliding of the main armour layer if the toe and scour protection is failing. The scouring pattern is a function of the water depth, wave conditions, sediment characteristics, and breakwater configuration and reflection...
report 1997
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Van Gent, M.R.A. (author)
Wave interaction with dynamically stable structures is simulated by means of a numerical model based on fmite-amplitude shallow-water wave equations. The model can simulate wave motion on and inside permeable structures. For dynamically stable structures, including berm breakwaters, reef-type structures and gravel beaches, a procedure is...
report 1997
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Juhl, J. (author), Burcharth, H.F. (author), D' Angremond, K. (author), Sigurdarson, S. (author), Holmes, P. (author), Torum, A. (author), Lamberit, A. (author)
A research project on berm breakwater structures was carried out with the overall objective of arriving at a better design basis. Eight European organisations from Denmark, The Netherlands, United Kingdom, Norway, Italy and Iceland participated in the joint research project co-sponsored by the European Commission under the second research and...
report 1997
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Van Gent, M.R.A. (author)
Wave interaction with berm breakwaters is studied by means of a physical model and a numerical model. The physical-model tests have been used to verify the wave motion as calculated by the numerical model. The numerical model based on finite-amplitude shallow-water wave equations is capable of simulating the wave motion both on and inside the...
report 1997
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Juhl, J. (author)
The influence of permeability and stone gradation on the reshaping and wave overtopping of berm breakwaters was studied by flume model tests. Another aspect studied was the difference in reshaping comparing a berm breakwater constructed of two stone classes and a more stable Icelandic type of berm breakwater with the largest berm stones used as...
report 1997
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Alikhani, A. (author), Tomasicchio, G.R. (author), Juhl, J. (author)
Comprehensive three-dimensional model tests with a berm breakwater roundhead and the adjacent trunk section were carried out at the Danish Hydraulic Institute (DHI) and at the Hydraulic & Coastal Engineering Laboratory of Aalborg University (AAU). This paper describes the influence of wave obliquity on the profile shape, on the initiation of...
report 1997
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Holmes, P. (author), Tamburic, Z. (author)
A numerical model for the waves on the slope has been established. It is based on the existing NSW (Non-linear Shallow-water Wave Equations) model from MAST I (Norton and Holmes, 1991, and Norton and Holmes, 1992). This model has been re-established and more user friendly organized; impermeable and permeable slopes have been incorporated, and it...
report 1997
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Juhl, J. (author)
Note on the roundhead stability of berm breakwaters. Recession, erosion and longshore transport are measured
report 1996
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Archetti, R. (author), Lamberti, A. (author), Westeren, K. (author), Torum, A. (author)
In order to develop a model able to describe how berm breakwaters reshape under the attack of waves, a large quantity of data from 2D and 3D tests was collected and arranged in a database. The data were first standardised, and since data come from models with very different size, all the lengths were scaled with the nominal diameter (Dn50) of...
report 1996
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Sigurdarson, S. (author), Viggosson, G. (author), Benediktsson, S. (author), Smarason, O.B. (author)
This paper describes the 13 year experience of design and construction of rubble mound berm breakwaters in Iceland. Over twenty berm structures have been constructed since 1983. All berm breakwaters in Iceland have been constructed by local contractors who have developed considerable experience in this type of work. The paper describes the...
report 1996
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Alikhani, A. (author), Frigaard, P. (author), Hald, T. (author)
In order to describe the reshaping breakwater profile, the profile has to be schematized into profile parameters. Static stability is describe by damage and reshaping breakwaters by the profile. The profile can be schematized by profile parameters such as height and length parameters. Burcharth, and Frigaard (1988) made the first systematic...
report 1996
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Juhl, J. (author)
Programme of the 3rd workshop on berm breakwaters.
report 1996
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Jensen, M.S. (author), Frigaard, P. (author)
The report summaries the results obtained with a berm breakwater attacked by oblique waves. In the tests special attention is given to the influence of the rock shape on the longshore transport. Moreover, the reshaping berm profile and amount of wave overtopping is examined. The tests were performed in a tree-dimensional model in Jan.-Feb. 96'...
report 1996
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Archetti, R. (author), Lamberti, A. (author)
Berm or reshaping breakwaters represent a relatively new -type of wave barrier; more precisely the conscious acceptation of stone movement during reshaping and of the eventual dynamic equilibrium of the units in the exposed mound is new. Stones of the armour layer are accepted to move under the wave attack until a new equilibrium of the seaward...
report 1996
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Sloth, P. (author)
Figures with results from the tests; no text is attached.
report 1996
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Juhl, J. (author), Alikhani, A. (author), Sloth, P. (author), Archetti, R. (author)
For berm breakwaters as compared with traditional rubble mound breakwaters, special measures have to be taken for the breakwater roundhead. If stone displacements occur on a roundhead, the stones will be moved in the wave direction and will loose most of their stabilising effect. The major part of the research on berm breakwaters has...
report 1996
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Torum, A. (author)
Measurements of wave forces on single armour units, tests on berm breakwaters in shallow water.
report 1996
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Juhl, J. (author)
The overall objective of the research project on berm breakwater structures is to arrive at a better design basis, which will bring the design standards of berm breakwaters up to the level of design standards for other civil engineering structures. This objective will be reached by establishing an understanding of the physics of berm breakwaters...
report 1996
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Juhl, J. (author), Jensen, M.S. (author)
The influence of permeability and stone gradation on the reshaping and wave overtopping of berm breakwaters was studied as part of this research. Another aspect studied was the difference in reshaping comparing a berm breakwater constructed of two stone classes and a more stable Icelandic type of berm breakwater built of three stone classes with...
report 1996
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