Searched for: subject%3A%22Tetrapod%22
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Irias Mata, Marisol (author)
The design of hydraulic structures like breakwaters and crest walls is often based on empirical formulations, physical models test, numerical models and a fair amount of expert judgement. Each technique has its own pros and cons. The main limitation of the empirical formulas is that often they have to be applied outside their range of validity....
master thesis 2021
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De Jong, W. (author), Verhagen, H.J. (author), Olthof, J. (author)
Physical model tests were done on an armour of Tetrapods, placed in a single layer. The objective of the investigations was to study the stability of the secondary layer, and to see if the material of this secondary layer could be washed out through the single layer of Tetrapods. It was concluded that secondary armour is not washed out through...
conference paper 2004
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Van den Bosch, A.F.M. (author)
Door de jaren heen is er veel onderzoek gedaan naar golfbrekers en de stabiliteit van de 'armour layer'. Hieruit is gebleken dat de plaatsingsdichtheid van de 'armour layer' elementen een belangrijke parameter is. De doelstelling van dit onderzoek is om inzicht te verkrijgen in de invloed van de plaatsingsdichtheid op de stabiliteit van kubussen...
master thesis 2001
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de Jong, R.J. (author)
This report is the result of the Master thesis of the author, at Delft University of Technology, Faculty of Civil Engineering. The study was performed at DELFT HYDRAULICS, in cooperation with Boskalis Westminster Dredging BV. Despite the many studies and experiments that have already been performed on the subject of low-crested breakwaters, one...
master thesis 1996
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D' Angremond, K. (author), Van der Meer, J.W. (author), Van Nes, C.P. (author)
in this study an analysis concerning the pulsating and impact portion of the tensile stresses inside tetrapod armour units is presented. The data has been obtained from a series of small scale model tests performed at Delft Hydraulics. Stresses have been measured using a load cell technique developed and made available by Coastal Engineering...
report 1995
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Burcharth, H.F. (author), Liu, Z. (author), Jenssen, M.S. (author), Van der Meer, J.W. (author), D' Angremond, K. (author)
The paper presents a design formula for Tetrapod armour on a 1:1.5 slope exposed to head-on random wave attack The formula predicts the relative number of broken Tetrapods as function of: the mass of the Tetrapods, the concrete tensile strength and the wave height in front of the structure. Thus, the formula addresses the observed problem of...
report 1995
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Burcharth, H.F. (author)
The slender, complex types of armour units, such as Tetrapods and Dolosse are widely used for rubble mound breakwaters. Many of the recent failures of such structures were caused by unforeseen early breakage of the units, thus revealing an inbalance between the strength (structural integrity) of the units and the hydraulic stability (resistance...
report 1995
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Duijvestijn, A.M.W. (author)
Een van de meest toegepaste typen golfbrekers is de conventionele golfbreker. Dit is een constructie van meerdere lagen natuursteen soms afgedekt met een of twee lagen betonblokken waarbij verplaatsingen van elementen over het talud niet worden toegelaten. Een bermgolfbreker, opgebouwd uit meer, maar lichtere steen kan goedkoper zijn. Het idee...
master thesis 1995
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Van Nes, C.P. (author)
In the late seventies, begin eighties a number of large breakwaters was severely damaged. The armour layer of these breakwaters consisted of slender concrete armour units, like dolosse or tetrapods. It appeared that one of the main reasons of failure of these breakwaters was breakage of the armour units. Obviously, the mechanical strength of the...
master thesis 1994
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Nooru-Mohamed, M.B. (author)
In this report, the results of a numerical parameter study on temperature stresses caused by hydration of cement in concrete breakwater elements are shown. Two different geometries were analysed namely hollow cubes and tetrapods. The problem encountered in solid cube breakwaters is the undesirable temperature build up between the core and the...
report 1994
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