Authors: Negi, S.C., Jofriet, J.C., Quah, S. And H.E. Bellman
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Published in: CBE Journal » CBE Journal Volume 30 (1988)
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Haylage pressures in a 6.1 x 21.9-m monolithic concrete farm silo equipped with a bottom unloader were measured during the 1985-1986 season. The silo was instrumented with 15transducers placed symmetrically around the circumference at five levels. Pressure data were takenevery4 h by means of a micro computer-controlled data acquisition system. The results indicated that wall pressures in the unloader zone were 5-6 times greater than those measured further up. These overpressures seemed to be localized or distributed over a relatively small depth of 0.1 times the silo diameter. The predictions based on design formulas for bottom-unloading silos agreed closely with the measured pressures at all levels except the lowermost one. A greater overload factor and a smaller depth region than those given in the Dickinson-Jofriet method were recommended for the calculation of design load at the unloader level.
measurements of haylage pressures in a bottom-unloading silo
Negi, S.C., Jofriet, J.C., Quah, S. and H.E. Bellman 1988. MEASUREMENTS OF HAYLAGE PRESSURES IN A BOTTOM-UNLOADING SILO. Canadian Agricultural Engineering 30(2):257-262.
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