Experimental and Numerical Analysis of Bubbles Distribution Influence in BubbleDeck Slab under Harmonic Load Effect

Mahdi, Ali Sabah; Mohammed, Shatha D.

doi:10.48084/etasr.3963

Cited by 11 publications

(8 citation statements)

References 2 publications

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“…To obtain a finite element model that can reliably represent the dynamic behavior of a biaxial slab with voids, this work uses an experimental specimen obtained by A. S. Sabah & S. D. Mohammed (2021) as reference. This specimen consists on a 250cmx250cmx20cm slab with plastic spheres of 12cm in diameter, spaced by 16cm, as shown in Figure 1, made by the same authors.…”

Section: Numerical Analysismentioning

confidence: 99%

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Numerical Modeling of Dynamic Behavior in a Bi-Axial Hollow Slab

Mota¹,

Oliveirar²,

Carvalho³

2022

Anais Do(a) Anais Do Encontro Nacional De Modelagem Computacional, Encontro De Ciência E Tecnologia De Materiais, Conferência S

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Bi-axial hollow slab is a technology that reduces the amount of concrete by replacing it with plastic spheres with voids on their inside. This technique leads to material economy and self-weight saving, without considerable inertial loss. One of the main loads that a structure is subjected to is dynamic excitation caused by human interaction, which are characterized by being periodic and low frequency.In this context, this work aims to develop a mathematical model that describes the structural dynamic behavior of the hollow slab. To that, four finite element models were created, and their dynamic properties of vibration modes and natural frequencies were compared to an experimentally tested hollow slab specimen. The models 1, 2, 3 and 4 were elaborated with frame, shell-thin, shell-layered and solid element, respectively. The results presented in this paper show that the lowest variation was obtained by the model 3, with a 0,60% difference for a 6,7 Hz frequency relative to the first mode of the experimental hollow slab. It can be concluded that, among the numerical models analyzed in this work, the one that best describes the modal behavior of a bi-axial hollow slab it's the model 3, although models 2 presents good precision too.

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Section: Numerical Analysismentioning

confidence: 99%

“…This work aims to propose a reliable numerical modeling that describes the modal behavior of a stab with voids. Four models were developed by using a software of finite elements SAP2000 V23 and choosing the appropriate modeling by comparing with experimental results of A. S. Sabah & S. D. Mohammed (2021).…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Dynamic Behavior in a Bi-Axial Hollow Slab

Mota¹,

Oliveirar²,

Carvalho³

2022

Anais Do(a) Anais Do Encontro Nacional De Modelagem Computacional, Encontro De Ciência E Tecnologia De Materiais, Conferência S

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“…Regarding the bi-axial hollow slabs, the object of study of this paper, Mahdi and Mohammed [12] evaluated, through numerical and experimental approaches, the influence of the distribution of plastic spheres in a slab with voids under the effect of a harmonic load. The authors concluded that there were significant changes in the behavior of the structural slab, simply by changing the positions of the plastic spheres.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis in a bi-axial hollow slab submitted to human actions

Mota,

Oliveira,

Doz

2024

Rev. IBRACON Estrut. Mater.

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The bi-axial hollow slab is the result of applying a technology that removes concrete from the least useful region and replaces it with hollow plastic spheres. This technique leads to material economy and self-weight saving, without considerable inertial loss, enabling larger and more flexible spans. Consequently, these spans are vulnerable to unwanted vibrations and dynamic acceleration caused by external actions, such as movements produced by human activity. This way, understanding the dynamic behavior of this technology and confronting it with normative limits on the project phase is essential for a good performance in the serviceability limit state, bringing comfort to the user. This paper studies the dynamic behavior of a bi-axial hollow slab submitted to human actions, such as jumping, dancing, clapping, moving the body, and moving and clapping at the same time. For that, this work made a numerical model of the structure and applied dynamic actions to it. The numerical results show that, for most of the actions, normative limits are satisfied, but the slab presents excessive accelerations in the case of jumping and dancing.

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“…Over the last three decades, substantial advancements in computer programs and FE techniques have made many commonly used 3D structural studies more affordable. The current research models and investigates the behavioral reaction of the pavement system using the ABAQUS 6.14-2 package [9]. Solid structural 3D pavement analysis utilizing the linear, general purpose brick element C3D8R has been adopted in the modeling process.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Base Layer Thickness in Flexible Pavements

Al-Sherrawi

2021

Eng. Technol. Appl. Sci. Res.

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Flexible pavement design and analysis were carried out in the past with semi-experimental methods, using elastic characteristics of pavement layers. Due to the complex interferences between various layers and their time consumption, the traditional pavement analysis, and design methods were replaced with fast and powerful methods including the Finite Element Method (FEM) and the Discrete Element Method (DEM). FEM requires less computational power and is more appropriate for continuous environments. In this study, flexible pavement consisting of 5 layers (surface, binder, base, subbase, and subgrade) had been analyzed using FEM. The ABAQUS (6.14-2) software had been utilized to investigate the influence of the base layer depth on vertical stresses and displacements. Three different thicknesses were adopted (10, 20, and 30cm) with constant other pavement layer thicknesses. The results of this study showed that the stress levels at the top of the base layer increased by about 37% when the thickness of this layer increased from 10cm to 30cm, while the stress levels at the top of the subbase layer decreased by about 64%. When the base layer increased from 10 to 20, from 20 to 30, and from 10 to 30cm the vertical displacement decreased by 18%, 24%, and 37% respectively.

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Experimental and Numerical Analysis of Bubbles Distribution Influence in BubbleDeck Slab under Harmonic Load Effect

Cited by 11 publications

References 2 publications

Numerical Modeling of Dynamic Behavior in a Bi-Axial Hollow Slab

Numerical Modeling of Dynamic Behavior in a Bi-Axial Hollow Slab

Dynamic analysis in a bi-axial hollow slab submitted to human actions

The Influence of Base Layer Thickness in Flexible Pavements

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