Flow pattern and normal pressure distribution in flat bottom silo discharged using wall outlet

Wang, Peijun; Luan, Zhu; Zhu, Xulin

doi:10.1016/j.powtec.2016.03.036

Cited by 34 publications

(9 citation statements)

References 27 publications

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“…The maximum pressure occurs at the initial stage of silo discharging, while the dynamic lateral pressure at the end of the discharging is relatively small. The above results are in accord with the references [31][32][33][34][35], which shows that the designed experiment is reliable. Accordingly, the comparisons of theoretical and the experimental results are shown in Fig.…”

Section: Fig 3 Schematic Diagram Of Experiments Systemsupporting

confidence: 89%

Modified Lateral Pressure Formula of Shallow and Circular Silo Considering the Elasticities of Silo Wall and Storage Materials

Liang

2021

Preprint

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For the shallow and circular silo(SCS), when the aspect ratio is between 1.0 and 1.5, the lateral pressure especially dynamic pressure may cause destruction if the size of the silo is large. In general, the lateral pressures should be calculated simultaneously according to the shallow silo and the deep silo calculation formulas based on Rankine’s earth pressure theory and Janssen’s theory, respectively, and the larger value of them should be adopted. However, whether the two formulas are reasonable needs to be verified. This paper proposed a modified calculation method of lateral pressure on the silo wall of SCS, considering the elasticities of silo wall and storage materials. The availability of shallow silo and deep silo methods, and the modified method were compared with the experiment and simulation. The results show that the Rankine’s formula is too conservative for the static lateral pressure, and the results of the modified method and Janssen formula are close to that of the experimental and simulation. For the dynamic lateral pressure calculation, Rankine theory is unsafe for the discharging load. The relative error of the dynamic lateral pressure based on Janssen theory is between 20% and 30%, which is too large. The dynamic lateral pressure calculated by the modified method is in good agreement with that of the experimental and simulation, and the relative error is less than 10%. Therefore, the modified method of lateral pressure formula is reasonable, which can provide guidance for the safety design of silo structure.

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Section: Fig 3 Schematic Diagram Of Experiments Systemsupporting

confidence: 89%

Modified Lateral Pressure Formula of Shallow and Circular Silo Considering the Elasticities of Silo Wall and Storage Materials

Liang

2021

Preprint

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“…The development of these progressive structures is constrained by the lack of studies of the stress-strain state of these shells because these structures have a folding lock. A number of domestic and foreign scientists have been engaged in the analysis of structures, calculation methods and experimental studies of cylindrical shells of metal silos for strength and stability [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Mileykovsky et al [5] in their work presented a computational model of the shell in the form of a scan of a cylindrical surface, which is considered as a ribbed plate with inclined edges.…”

Section: Introductionmentioning

confidence: 99%

Features of structures and calculation of steel spiral-fold silos

et al. 2021

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The advantages of metal silos in comparison with reinforced concrete are given. Types of silos depending on a wall design are considered. The construction of steel spiral-fold silos and the method of forming a cylindrical body are considered. The general design of a spiral-fold silo is illustrated. Features of the folding lock, its geometry and location are described. The specifics of the construction of spiral-fold silo, which affects their stress-strain state, are analyzed. Listed two calculation schemes of silо depending on the complexity of input information for the computer. The standard documents which regulates the design of steel silo tanks on the territory of Ukraine are analyzed. The main loads and influences which are accepted at calculation of silos are listed. The basic formula of check of the general durability of a wall of a silo is resulted, the components of the formula are decrypted. The algorithm for calculating the spiral-folded silage is given.

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“…Studies have been conducted with reference to the determination of pressures acting on flat bottom silos (Diniz & Nascimento, 2006;Balevičius et al, 2011;Gallego et al, 2011;Rotter & Sadowski, 2012;Nascimento et al, 2013;Lopes Neto et al, 2014;Wen et al, 2015;Horabik et al, 2016;Wang et al, 2016;Pieraccini et al, 2017;Frank et al, 2018). However, there is a need for studies on the use of new materials for the flat bottom of these silos, which are elements subject to dynamic, often non-uniform loads.…”

Section: Introductionmentioning

confidence: 99%

Fiber-reinforced concrete for the flat bottom of silos

Constantino

Neto

Nóbrega

et al. 2020

Rev. bras. eng. agríc. ambient.

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The use of synthetic fibers as reinforcement for concrete replacing the steel reinforcement has been diffused worldwide in several applications, gaining prominence in the application for industrial floors, tunnel linings, road pavements, etc., i.e., continuous structures in contact with soil that require performance in the elastic medium. The present study investigated the applicability of concrete reinforced with synthetic fibers in the bottom slab of silos supported directly on the ground, being composed of an experimental study and a case study. The experimental study consisted of the analysis of the mechanical behavior of this concrete by testing three concentrations of synthetic fibers (3.0, 4.5 and 6.0 kg m -3 ) in a conventional simple concrete matrix. The case study consisted of the design of this part in conventional reinforced concrete and concrete reinforced with synthetic fibers with the objective of performing an economic comparison between the two projects. The experimental results showed that the fiber concentration that contributed to a better mechanical performance of the concrete matrix was 3.0 kg m -3 . The case study showed that the most economical design was the one made with fiber-reinforced concrete.Concreto reforçado com fibras para o fundo plano de silos RESUMO: O emprego de fibras sintéticas como reforço para concretos em substituição das armaduras de aço vem sendo difundido mundialmente em diversas aplicações, ganhando destaque na aplicação para pisos industriais, revestimentos de túneis, pavimentos rodoviários, etc., isto é, estruturas contínuas em contato com o solo que requerem desempenho no meio elástico. O presente trabalho investiga a aplicabilidade do concreto reforçado com fibras sintéticas na laje de fundo de silos apoiados diretamente sobre o solo, sendo o mesmo composto por um estudo experimental e um estudo de caso. O estudo experimental resume-se na análise do comportamento mecânico desse concreto, testando-se três concentrações de fibras sintéticas (3.0, 4.5 e 6.0 kg m -3 ) numa matriz de concreto simples convencional. O estudo de caso consiste no dimensionamento dessa peça em concreto armado convencional e concreto reforçado com fibras sintéticas, com o objetivo de realizar um comparativo econômico entre os dois projetos. Os resultados experimentais mostraram que a concentração de fibras que contribuiu para melhor desempenho mecânico da matriz de concreto foi o de 3.0 kg m -3 . O estudo de caso mostrou que o projeto mais econômico foi o dimensionado com concreto reforçado com fibras. Palavras-chave: comportamento mecânico, dimensionamento, materiais alternativos

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Flow pattern and normal pressure distribution in flat bottom silo discharged using wall outlet

Cited by 34 publications

References 27 publications

Modified Lateral Pressure Formula of Shallow and Circular Silo Considering the Elasticities of Silo Wall and Storage Materials

Modified Lateral Pressure Formula of Shallow and Circular Silo Considering the Elasticities of Silo Wall and Storage Materials

Features of structures and calculation of steel spiral-fold silos

Fiber-reinforced concrete for the flat bottom of silos

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