Discrete model for circular and square rigid tanks with concentric openings – Seismic analysis of a historic water tower

Zanni, Angeliki; Spyridis, Michail; Karabalis, Dimitris L.

doi:10.1016/j.engstruct.2020.110433

Cited by 3 publications

(3 citation statements)

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“…The interface layer between the pipeline structure and the surrounding soil requires a unique estimation. Analyzing such a soil−structure interaction is not easy to estimate, as no closed-form solution can predict this interaction accurately; however, this interaction can be effectively analyzed using the finite element analysis (FEA) [2][3][4][5][6]. In addition, the soil−structure interaction usually is not considered in pipeline and box culverts designs, where the applied pressure above the pipeline and the box culvert is assumed to be equivalent to the geostatic load, which is the earth prism weight measured above the pipeline or the box culvert (Pimentel et al, 2009 [7]).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the soil−structure interaction usually is not considered in pipeline and box culverts designs, where the applied pressure above the pipeline and the box culvert is assumed to be equivalent to the geostatic load, which is the earth prism weight measured above the pipeline or the box culvert (Pimentel et al, 2009 [7]). As the soil−structure interaction is challenging to experimentally estimate, several studies have efficiently exploited numerical tools such as finite element modeling and artificial intelligence to predict the effect of the soil−structure interaction for various structural types [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Therefore, the soil−structural interaction should be included in the pipeline and culvert design in order to estimate the structural response of such infrastructures accurately.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of the Structural Performance of Buried Reinforced Concrete Pipelines in Cohesionless Soils

et al. 2022

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Pipelines are widely used to transport water, wastewater, and energy products. However, the recently published American Society of Civil Engineers report revealed that the USA drinking water infrastructure is deficient, where 12,000 miles of pipelines have deteriorated. This would require substantial financial investment to rebuild. Furthermore, the current pipeline design practice lacks the guideline to obtain the optimum steel reinforcement and pipeline geometry. Therefore, the current study aimed to fill this gap and help the pipeline designers and practitioners select the most economical reinforced concrete pipelines with optimum steel reinforcement while satisfying the shear stresses demand and serviceability limitations. Experimental testing is considered uneconomical and impractical for measuring the performance of pipelines under a high soil fill depth. Therefore, a parametric study was carried out for reinforced concrete pipes with various diameters buried under soil fill depths using a reliable finite element analysis to execute this investigation. The deflection range of the investigated reinforced concrete pipelines was between 0.5 to 13 mm. This indicates that the finite element analysis carefully selected the pipeline thickness, required flexural steel reinforcement, and concrete crack width while the pipeline does not undergo excessive deformation. This study revealed that the recommended optimum reinforced concrete pipeline diameter-to-thickness ratio, which is highly sensitive to the soil fill depth, is 6.0, 4.6, 4.2, and 3.8 for soil fill depths of 9.1, 12.2, 15.2, and 18.3 m, respectively. Moreover, the parametric study results offered an equation to estimate the optimum pipeline diameter-to-thickness ratio via a design example. The current research outcomes are imperative for decision-makers to accurately evaluate the structural performance of buried reinforced concrete pipelines.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of the Structural Performance of Buried Reinforced Concrete Pipelines in Cohesionless Soils

et al. 2022

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“…Analysis of fluid storage tanks is a vexed issue by comparison with other type of storage tanks due to complexity and difficulty of fluid structure interaction. Elevated fluid storage tanks are the most fragile ones under seismic loads among anchored, unanchored and elevated ones due to bearing heavy water body on their tall and slender staging system [2,3]. External forces particularly earthquakes induce large structure deformations and sloshing on the free surface.…”

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confidence: 99%

Fluid Structure Interaction Analyses of Elevated Storage Tank under Seismic Load

Erdem,

Gücüyen

2024

C. R. Acad. Bulg. Sci.

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Elevated storage tanks are used to store fresh and waste water, cereal, oil and petrochemical materials. Therefore they serve in a wide area of utilization in this day and age. Analysis of a half full with water elevated storage tank is performed in the scope of this study. The structure is composed of a steel circular storage tank and frame typed steel stager. The structure is under the effect of earthquake loads as well as operational ones. Numerical model is generated by Finite Elements Analysis (FEA) software including fluid and structure parts. The interaction of the parts is provided by Coupled Eulerian Lagrangian (CEL) technique. While the structure constitutes the Lagrangian part, the fluid constitutes the Eulerian part. Interaction of Eulerian and Lagrangian parts are provided by general contact algorithms. Free surface movement of the water, maximum displacements and natural frequency values with related mode shapes of the structure are obtained after numerical analysis. Numerical results are verified by semi-analytical model, where the structure is modelled as single degree of freedom system. The accordance between results is numerically and visually obtained. The turbulent movement of water under the influence of an earthquake is modelled by utilizing the CEL technique. So, the effect of the dynamic pressure induced by the turbulence on the tank and the structural system has been taken into consideration.

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Structural performance of buried reinforced concrete pipelines under deep embankment soil

Almasabha

Shehadeh

Alshboul

et al. 2023

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Purpose Buried pipelines under various soil embankment heights are cost-effective alternatives to transporting liquid products. This paper aims to assist pipeline architects and professionals in selecting the most cost-effective buried reinforced concrete pipelines under deep embankment soil with minor structural reinforcement while meeting shear stress requirements, safety and reliability constraints. Design/methodology/approach It is unfeasible to experimentally assess pipeline efficiency with high soil fill depth. Thus, to fill this gap, this research uses a dependable finite element analysis (FEA) to conduct a parametric study and carry out such an issue. This research considered reinforced concrete pipes with diameters of 25, 50, 75, 100, 125 and 150 cm at depths of 5, 10, 15 and 20 m. Findings According to this research, the proposed best pipeline diameter-to-thickness (D/T) proportions for soil embankment heights 5, 10, 15 and 20 m are 8.75, 4.8, 3.5 and 3.1, correspondingly. The cost-effective reinforced concrete (RC) pipeline thickness dramatically rises if the soil embankment reaches 20 m, indicating that the soil embankment depth highly influences it. Most of the analyzed reinforced concrete pipelines had a maximum deflection value of less than 1 cm, telling that the FEA accurately identified the pipeline width, needed flexural steel reinforcement, and concrete crack width while avoiding significant distortion. Originality/value The cost-effective thickness for the analyzed structured concrete pipes was calculated by considering the lowest required value of steel reinforcement. An algorithm was developed based on the parametric scientific findings to predict the ideal pipeline D/T ratio. A construction case study was also shown to assist architects and professionals in determining the best reinforced concrete pipeline geometry for a specific soil embankment height.

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Discrete model for circular and square rigid tanks with concentric openings – Seismic analysis of a historic water tower

Cited by 3 publications

References 22 publications

Optimization of the Structural Performance of Buried Reinforced Concrete Pipelines in Cohesionless Soils

Optimization of the Structural Performance of Buried Reinforced Concrete Pipelines in Cohesionless Soils

Fluid Structure Interaction Analyses of Elevated Storage Tank under Seismic Load

Structural performance of buried reinforced concrete pipelines under deep embankment soil

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