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Dust Explosion of RC Silos
Abstract In this paper the phenomenon of dust explosion, as an accidental load case of reinforced concrete silos is introduced. Accidental loads were typically not considered in the design of industrial structures and, as tragic events from the last decades showed, sometimes this negligence lead to fatal consequences. The aim of this paper is to highlight the possibility and the risk of dust explosion and to alarm the design engineers to take unusual, accidental loads into account in every day design. The theoretical bases of the phenomenon and the governing parameters generating a dust explosion are explained in this paper. The relevant standards for design and prevention are referred and the closed-form equations to evaluate dust explosion sensitivity according to EN 14491 are introduced. The necessity of venting devices to reduce the maximal internal pressure in silo cells is discussed. A case study is presented, based on actual projects on the supervision of silos from EMI-TUV SUD’s practice in Hungary, to show the calculation steps and the methodology of the analysis. A code-based simplified approach is provided to determine the required venting area and to check the available capacity of the load-bearing structure. The evaluation of material properties in case of dynamic effects is considered by ACI standards. For more refined calculations the recommendation by MC 2010 can also be applied. Feasible theoretical assumptions for practical application in design are recommended.
Dust Explosion of RC Silos
Abstract In this paper the phenomenon of dust explosion, as an accidental load case of reinforced concrete silos is introduced. Accidental loads were typically not considered in the design of industrial structures and, as tragic events from the last decades showed, sometimes this negligence lead to fatal consequences. The aim of this paper is to highlight the possibility and the risk of dust explosion and to alarm the design engineers to take unusual, accidental loads into account in every day design. The theoretical bases of the phenomenon and the governing parameters generating a dust explosion are explained in this paper. The relevant standards for design and prevention are referred and the closed-form equations to evaluate dust explosion sensitivity according to EN 14491 are introduced. The necessity of venting devices to reduce the maximal internal pressure in silo cells is discussed. A case study is presented, based on actual projects on the supervision of silos from EMI-TUV SUD’s practice in Hungary, to show the calculation steps and the methodology of the analysis. A code-based simplified approach is provided to determine the required venting area and to check the available capacity of the load-bearing structure. The evaluation of material properties in case of dynamic effects is considered by ACI standards. For more refined calculations the recommendation by MC 2010 can also be applied. Feasible theoretical assumptions for practical application in design are recommended.
Dust Explosion of RC Silos
Vardai, Attila (author) / Madaras, Botond (author)
2017-08-06
8 pages
Article/Chapter (Book)
Electronic Resource
English
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