oa Civil Engineer in South Africa - Investigation into stability of a silo with concentric and eccentric emptying : technical paper



This paper reports on a qualitative experimental programme on model silos. The objective was to study the flow patterns in a silo of given proportions, with either a concentric or an eccentric outlet, as well as the susceptibility to buckling of a steel silo with either of the two types of outlet. It was found that a thin-walled silo with a concentric outlet tends to be surprisingly well behaved, and one with an eccentric outlet equally surprisingly susceptible to buckling and collapse. It is concluded that none of the existing theories adequately address the issue of buckling of an eccentrically-emptied silo.

Hierdie referaat handel oor 'n kwalitatiewe program van eksperimente op modelsilo's. Die doel was die bestudering van vloeipatrone in 'n silo van bapaalde verhoudinge, met of 'n eksentriese uitlaat, asook die geneigdheid tot knik van 'n staalsilo met een van die twee tipes uitlaat. Daar is bevind dat 'n dunwandige silo met 'n konsentriese uitlaat hom merkwaardig goed gedra, terwyl een met 'n eksentriese uitlaat 'n ewe merkwaardige geneigdheid tot knik en omkanteling toon. Die gevolgtrekking word gemaak dat geeneen van die bestaande teoriee die knik van eksentries-geledigde silo's bevredigend aanspreek nie.


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