Miller Magazine Issue: 125 May 2020

69 COVER STORY MILLER / MAY 2020 to do the grain storage in safety conditions. Well projected silos has aeration systems calculated according engineering parameters to the grain type, safe structural designing to operation and embedded technology to monitoring the storage product conditions. The silos structural designing is fundamental factor of operational safety, and needs to follow engineering rules applying to the project. To evaluate the structural efficien- cy and operational safety of this kind of structure, Kepler Weber in a partnership with Dr. Carlito Calil Junior, Se- nior Professor of Enginner- ing School of São Carlos of São Paulo University, is do- ing the structural analysis of steel silos corrugated plates and stiffeners, consider- ing the American Standard ANSI/ASAE EP 433:1991 (Reaffirmed 2011) to the storage product forces de- termination and the stan- dards AISI S100-12 e AISC 360-10 to the parts resis- tance determination. For evaluation purpose, two silo models were con- sidered: SL 7222 e SL 9022, with storage capacities of 234.733 and 373.459 bushels respectively. The re- sults interpretation is based on the used coefficient val- ue to be bigger or smaller than 1,00. When the coefficient used is smaller than 1,00 it means the mechanical efforts requested is smaller than the materi- als resistance, so the structural designing attends the physi- cal efforts demand, according to the regulations. The graphics showed two curves: the blue line indicates Figure 1. Infographic of world population from 2015 to 2030 Source: World Bank (2017) Figure 2. Steel silos storage system Source: Kepler Weber (2020)