The influence of the base boundary condition in modelling filling of a metal silo

Goodey, R.J.; Brown, Chris

doi:10.1016/j.compstruc.2004.02.003

Cited by 23 publications

(13 citation statements)

References 14 publications

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“…The models all had a hopper below the box, with the transition junction between them. The boundary condition of a hopper or flat base can be represented in different ways, but the choice can have a major effect on pressure predictions above the transition [40]. A hopper is 7 chosen here to minimise the influence on the box pressures.…”

Section: Description Of the Fe Model For A Rectangular Planform Silo mentioning

confidence: 99%

Rectangular steel silos: Finite element predictions of filling wall pressures

Goodey

Brown

Rotter

2017

Engineering Structures

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This is the accepted version of the paper.This version of the publication may differ from the final published version. Abstract: The pressures exerted on the walls of rectangular planform steel flexible-walled silos by several different stored granular bulk solids are investigated using a validated finite element model that has been used in several previous studies. These pressures and the state of stress in the bulk solid are explored for a range of silo geometries and stored bulk solids. Permanent repository linkThe results show that the horizontal pressure distribution across a silo wall is generally not uniform. This demonstrates that widely used theories may be adequate for stiff concrete silos, are far from suited to flexible-walled steel silos, and the differences can be used to produce much lighter structures. These findings match previously published experimental and analytical results for square planform silos where much larger pressures develop in the corners. The present analyses show that rectangular silos differ from those of square section, in that the mean pressure and degree of pressure variation is different on the two walls. The mechanisms causing these changes are investigated. The results further demonstrate that relatively small changes in the properties of a stored solid can produce significant changes in the pressure magnitudes and patterns, and hence greatly influence the silo structural design.The paper concludes that existing design guidance is seriously deficient and leads to metal silos that are considerably more expensive than is necessary.ª Author to receive correspondence.2

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Section: Description Of the Fe Model For A Rectangular Planform Silo mentioning

confidence: 99%

Rectangular steel silos: Finite element predictions of filling wall pressures

Goodey

Brown

Rotter

2017

Engineering Structures

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“…The filling process was modelled by increasing gravity incrementally until the full value of the granular solid self-weight was reached. This calculation procedure leads to little difference from a progressive layered filling calculation in square silos [41].…”

Section: Finite Element Modelling and The Constitutive Lawmentioning

confidence: 99%

Towards design rules for rectangular silo filling pressures

Rotter

Goodey

Brown

2019

Engineering Structures

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An experimentally validated finite element model of filling pressures in rectangular silos with flexible walls is used to predict the stress regime in the stored solid in squat and intermediate aspect ratio silos. The model predicts the state of stress in the stored solid and the pressures imposed on the flexible walls of the silo. The non-uniform horizontal pressure distributions at each depth at the end of filling are explored. It is known that an empirical relation for the horizontal pressure variation on each straight wall derived from experimental observations in an earlier study closely matches the computational predictions. The coefficients of this relation are found to vary with depth below the stored solid surface, and depend on the relative stiffness of stored solid and the silo wall. Following many calculations involving different solids, an empirical relationship is derived that is suitable for practical design for a range of different stored solids for which relevant properties are known. The resulting expression is well suited to the practical determination of filling pressures in rectangular silos, and provides a silo design pressure proposal that is based on theoretical, rather than empirical findings.

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“…In the last two decades, finite element methods based on the Abaqus software have been used in the analyses of silo structures [6,7,15,29]. The geometry and various materials (e.g.…”

Section: Numerical Pressure Analysismentioning

confidence: 99%

“…Meanwhile, most of research in the literature regards the reinforcement of cracked beams using CFRP, but CFRP reinforced silos still require additional investigations. Most of these investigations studied the behavior of various parameters on silos, such as the effect of boundary conditions [6,7], the effect of grain-flow regimes [8] and the material properties [9,10]. Also, the interactions between the structure of a silo and its stored material is of great interest [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

FEM investigation of concrete silos damaged and reinforced externally with CFRP

Kermiche

Boussaid

Redjel

et al. 2017

Mechanics & Industry

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The present work investigates the reinforcement of concrete wheat-grain silos under initial damage. The reinforcement is achieved by mounting bands of carbon fiber reinforced polymer (CFRP) on the external walls of the silo. 4 modes of reinforcement are adapted according to the width of the band, the gap between two bands, the height of reinforcement and the number of layers achieved through banding. Analytical analyses were conducted using the Reimbert method and the Eurocode 1 Part 4 method, as well as numerically through the finite element software Abaqus. Results show that the normal pressure reaches a peak value when approaching the silo hopper. Initial damage in a concrete silo was first determined using a 3D geometrical model, while the damage analyses were conducted to optimize the CFRP reinforcement by mounting 2 CFRP bands close together above and below the cylinder-hopper joint. Increasing the number of banding layers could produce better performance as the damage was slightly decreased from 0.161 to 0.152 for 1 and 4 layers respectively.

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The influence of the base boundary condition in modelling filling of a metal silo

Cited by 23 publications

References 14 publications

Rectangular steel silos: Finite element predictions of filling wall pressures

Rectangular steel silos: Finite element predictions of filling wall pressures

Towards design rules for rectangular silo filling pressures

FEM investigation of concrete silos damaged and reinforced externally with CFRP

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