Numerical Model Study of Prototype Drop Tests on Cube and Cubipod® Concrete Armor Units Using the Combined Finite–Discrete Element Method

Scaravaglione, Giulio; Latham, John; Xiang, Jiansheng

doi:10.3390/jmse9050460

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…Armour blocks are the main structures responsible for wave breaking and energy dissipation in coastal protection engineering, usually made of natural rock blocks or artificial concrete blocks [1]. The implementation of armour blocks on breakwaters [2] is a typical method of wave mitigation and marine disaster prevention.…”

Section: Introductionmentioning

confidence: 99%

Physical Experimental Study on the Wave Reflection and Run-Up of a New Ecological Hollow Cube

Zhao,

Ding,

et al. 2024

Preprint

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A new type of artificial block is proposed by modifying the traditional block. Based on the physical model experiment, the wave reflection and run-up characteristics of the new ecological blocks under regular waves were examined, and the influence of the height of the "planting trough" border on the hydrodynamic properties was analyzed. The results indicate that the wave reflection and run-up would decrease with a decrease in the breakwater slope. As wave height increases, wave run-up increases, and the reflection coefficient falls. Wave reflection and run-up increase with an increasing wave period. The relative depth of the water has a smaller impact on the wave reflection than the wave run-up. The reflection coefficient of the new ecological blocks is consistently lower than that of the conventional and continues to decrease as the border of the "planting trough" is raised. The raised borders prevent water loss in the trough, resulting in no significant improvement in the wave run-up performance of the new blocks. The reflection coefficient and the relative run-up R/H gradually increase with the average wave breaking parameter ξ increase. The crude permeability coefficients for the new blocks, New Heights 1 and New Heights 2, are 0.53, 0.53, and 0.54, respectively.

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Section: Introductionmentioning

confidence: 99%

Physical Experimental Study on the Wave Reflection and Run-Up of a New Ecological Hollow Cube

Zhao,

Ding,

et al. 2024

Preprint

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“…An advanced numerical model-the combined finite-discrete element method (FEMDEM)-has allowed researchers to analyze an armor unit's inner structure and the multi-body interactions between armor units. FEMDEM was used to 1065 (2022) 012021 IOP Publishing doi:10.1088/1755-1315/1065/1/012021 2 simulate prototype drop tests of cube and cubipod, to simulate drop tests and pendulum tests of dolos, and to simulate collisions between Core-Loc under gravity [2,3]. Through these simulations, fracture behaviors of these armors were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Quantitative consideration in selection of breakwater concrete armor unit based on unit’s internal tensile stress response

Wurjanto

Hardaya²

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Concrete armor units are essential for the protection of rubble mound breakwaters, yet their selection is generally not based on structural integrity considerations. In this study, the authors used static finite element simulations, as implemented by Ansys software, to compare the structural integrity of five armor units: Accropode, A-Jack, BPPT-Lock, tetrapod, and dolos. All armor units have a mass of around 11,500 kg and have the same quality of concrete at f’c of 30 MPa. The study involves two different loading cases: Armor units were (1) arranged on a breakwater slope subjected to their own weight and (2) placed on a horizontal ground subjected to idealized wave attacks. In Case #1, the armor units were modelled fixed to the ground and bonded to each other. In Case #2, the wave attack was modelled as a unidirectional and uniform pressure. From the simulation results, the authors compare the highest tensile stresses which could be found on the corner regions of the armor units—their most vulnerable region. In both cases, armor units with stocky shapes experience lower tensile stresses compared to those with slender shapes. These results confirm that Accropode, BPPT-Lock, and tetrapod are structurally safer than dolos and A-Jack.

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The Role of Utilizing Load in Different Cases While Numerical Modeling of Multi-story Buildings on Alluvial Stratum: A Comparison Study

Arslan,

Kayaturk,

Durmus

et al. 2024

Arab J Sci Eng

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Industrialization and population growth have made surface areas more valuable, thereby the multi-story buildings have become an absolute necessity. At this point, numeric models became the fastest and simplest way to evaluate the response of soils and structures. The issued factor in the current paper is related to the way of transferring the multi-story building loads to an alluvial stratum and evaluate the accuracy of different cases, in order to save time and economy. For load transfer, the first case (case i) includes uniform distributed load, the second case (case ii) includes the transfer from the basement columns and walls, and the third case (case iii) includes modeling the real state of the building. Mainly, all three cases gave close results in terms of settlement magnitudes of 2.21, 1.96, and 1.81 cm, respectively. It was inspected that case (i) showed 12.8% more deformation than case (ii) and 22.1% more deformation than case (iii). However, the situation is not the same for the settlement pattern, and the under-column and corner effects are neglected in uniform load. Additionally, the bending moments, which is a critical parameter for the design of a reinforced concrete foundation, have developed different results. In case (ii) and (iii) a bending moment of 500 kNm/m is observed in the center column, while in case (i) the moments converge to 0. Therefore, this study highlights the importance of outstanding decision making when assessing the load-transferring mechanism in modeling with numerical methods. The necessity of the determination of the convenient load transfer way depending on the parameter that is crucial in the evaluation of the soil–structure interaction comes to the fore with current paper.

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Numerical Model Study of Prototype Drop Tests on Cube and Cubipod® Concrete Armor Units Using the Combined Finite–Discrete Element Method

Cited by 5 publications

References 21 publications

Physical Experimental Study on the Wave Reflection and Run-Up of a New Ecological Hollow Cube

Physical Experimental Study on the Wave Reflection and Run-Up of a New Ecological Hollow Cube

Quantitative consideration in selection of breakwater concrete armor unit based on unit’s internal tensile stress response

The Role of Utilizing Load in Different Cases While Numerical Modeling of Multi-story Buildings on Alluvial Stratum: A Comparison Study

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