Measurements of Forces on Dolos Armor Units at Prototype Scale

Howell, Gary L.

doi:10.1061/9780872626874.175

Cited by 9 publications

(6 citation statements)

References 4 publications

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“…One key aspect to be addressed before numerical modelling can be applied in design work is to define and find a means of applying the wave loading conditions that units are exposed to. According to previous research, there are five main types of loads acting on armour units (Burcharth, 1981a;Howell, 1988;Burcharth et al, 1991), which are listed in Table 1. The complexity of the in situ loading conditions make it very difficult even impossible to accurately represent reality in physical experiments and numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of breakages of concrete armour units using a three-dimensional fracture model in the context of the combined finite-discrete element method

Guo

Latham

Xiang

2015

Computers & Structures

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Rubble-mound breakwaters covered by armour layers of concrete units are widely used coastal structures. In this work, a three-dimensional fracture model in the context of the combined finite-discrete element method is applied to investigate the structural integrity of two types of concrete armour units under dynamic and extreme loading conditions. Dolosse units are simulated in drop tests and pendulum tests, and Core-Loc units of prototype scale are simulated under an imaginary extreme loading condition. The whole structural response of concrete armour units is accurately captured and the results provide a better understanding of damage and reserve stability of such systems.

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Section: Introductionmentioning

confidence: 99%

Numerical simulation of breakages of concrete armour units using a three-dimensional fracture model in the context of the combined finite-discrete element method

Guo

Latham

Xiang

2015

Computers & Structures

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“…The measurements were made during the winters of 1987 and 1988. The experimental design and examples of the prototype data are shown in Howell (1988). The dolos records during storms which occurred March 12-15, November 29-30, andDecember 1, 5, 6, 1987, andJanuary 9-11, 14-16, 1988 were selected for this analysis.…”

Section: Prototype Measurementsmentioning

confidence: 99%

Estimation of Peak Wave Stresses in Slender Complex Concrete Armor Units

Howell

Burcharth

Rhee

1991

Coastal Engineering 1990

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“…A number of researchers are making use of physical models to measure the structural response of armour units (for example, Scott et al, 1986aand b, Nishigari et al, 1986, Losada et al, 1988, Jensen and Juhle, 1988. In addition to these physical model investigations, a very extensive prototype study is being carried out at Crescent City, U.S.A. to measure dolos response in full scale situations (Howell, 1988), and a non-linear numerical model is being developed to determine the response of dolos in waves McDougal, 1985, Tedesco et al, 1988). Other types of research, including both prototype studies (Burcharth, Feb. 1981 and physical modelling (Timco and Mansard (1982)) have also been carried out; however, these investigations have not measured the response of armour units under wave attack, but have tested units to failure.…”

Section: Department Of Civil Engineeringmentioning

confidence: 99%

Armour Unit Structural Response - A Parametric Study

Anglin

Baird

Mansard

et al. 1988

Int. Conf. Coastal. Eng.

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There is a general lack of knowledge regarding the nature and magnitude of loads acting on armour units used for the protection of rubblemound coastal structures. Thus, a comprehensive design procedure incorporating both the hydraulic stability and the structural integrity of the armour units does not exist. This paper presents the results of a detailed parametric study of the structural response of armour units to wave-induced loading in a physical breakwater model. The effect of the following design parameters is investigated: breakwater slope, armour unit location, wave period and wave height. This research has made a number of significant contributions towards the development of a comprehensive design procedure for concrete armour units. It has identified a linear relationship between the wave-induced stress in the armour units and the incident wave height. In addition, it has shown that the conditional probability of waveinduced stress given wave height can be estimated by a log-normal distribution. Finally, a preliminary design chart has been developed which incorporates both the structural integrity and the hydraulic stability of the armour units.

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Measurements of Forces on Dolos Armor Units at Prototype Scale

Cited by 9 publications

References 4 publications

Numerical simulation of breakages of concrete armour units using a three-dimensional fracture model in the context of the combined finite-discrete element method

Numerical simulation of breakages of concrete armour units using a three-dimensional fracture model in the context of the combined finite-discrete element method

Estimation of Peak Wave Stresses in Slender Complex Concrete Armor Units

Armour Unit Structural Response - A Parametric Study

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