PRESSÕES EM SILOS ESBELTOS COM DESCARGA EXCÊNTRICA

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ABSTRACT
Most of the silos do not meet the ideal requirements for operation ought to
many factors. One of the main factors is related to the lack of knowledge about
the pressure imposed by the stored material, especially during discharge. In this
work, the discharge done through eccentric silos is investigated, which is
commonly employed by cooperatives and factories once they facilitate the access
of trains and trucks to the discharged product. In those situations there is the
occurrence of asymmetric pressure, which is the major cause of collapses and
accidents in silos. There are still many pending answers regarding the pressure
behavior in eccentric discharge; therefore, most international standards
recommend the adoption of additional pressures in order to consider the effects of
asymmetric pressures. The recommendations, however, are very diverse and not
always clear. The results obtained show that, in order to determine the actions in
slim silos for free flow product storage, it is important to use the methods
recommended by the EUROCODE and DIN standards, with some exceptions:
refer to the AS regarding to the pressure on the bottom of the silo, define the
minimum underpressure coefficient as 1.2, and minimum percentage of product
property variability, even if they are achieved through experimental tests.
Keywords: pressures, slim silos, eccentric discharge, storage structures.