Papers by Keyword: Bulk Solid

Abstract: With the increasing volume demand of silos, silo diameters are bigger and bigger. However, present wall pressure computation methods are mostly based on small diameter silos. To solve this problem, systematical research on the wall pressure in large diameter silos is of great importance. For now, in the Chinese code the wall pressure computation methods are based on the limit equilibrium theory to be calculated, which define the orientation of the rupture plane in the bulk solid within the silo. The rupture angle is a key parameter to silos’ wall pressure. Therefore the value and direction of rupture angle are researched by theoretical method in this paper, which has heavy significance and provide an important basis for the large diameter silo design.

Abstract: This paper introduces a finite element solution for predicting the normal pressure on large diameter squat silo wall, with the application of contact element and nonlinear model. The finite element analysis (FEA) described in this paper is compared with the full-scale tests and Coulomb theory and the Chinese Code. The predicted results are in good agreement with Coulomb theory, when the top of the stored solid is horizontal; while the result of Coulomb theory is much larger than the other solutions, when the top of the stored solid is a conical surcharge pile. The results from the modified Rankine theory in Chinese Code are acceptable in both conditions. Finally, the effects on the normal pressure of Young′s Modulus are also discussed.