Lateral and vertical pressures in two different full-scale grain bins during loading

• Autores: Sidney A. Thompson, N. Galili, R.A. Williams
• Localización: Food science and technology international = Ciencia y tecnología de alimentos internacional, ISSN-e 1532-1738, ISSN 1082-0132, Vol. 3, Nº 5, 1997, págs. 371-379
• Idioma: inglés
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• Resumen

  • Lateral and vertical floor pressures were measured in two different corrugated-walled steel grain bins using load cells mounted on the floor and walls of the bin. Bin one was 12.8 m in diameter and 17.1 m tall and bin two was 11.0 m in diameter and 14.0 m tall. Tests were conducted with corn. In the 12.8 m diameter bin the largest average lateral wall pressure was 28.2 kPa at a grain depth of 15.2 m, while in the 11.0 m diameter bin the largest average lateral pressure was 26.9 kPa at a grain depth of 11.9 m. Design standard EP433 produced only slightly more conservative lateral wall pressure values at larger grain heights than design standard DIN1055. In both the 12.8 m and 11.0 m diameter bins a significant decrease in vertical floor pressures was measured near the wall of the bins (> 0.85r), while at the other load cell locations the vertical floor pressure values were very similar in magnitude. In design, both EP433 and DIN1055 underestimated the vertical floor pressures which were measured in these bins. Based on these results some thought should be given to designing metal bins for both 'initial' conditions in which grain slides along 'virgin' materials and have a high coefficient of friction, and for 'worn' conditions in which oils and waxes have been deposited on the bin walls and thus produce a low coefficient of friction.