CREATING RELIABLE AND RESILIENT GRAIN STORAGE FACILITIES IN THE FACE OF WAR AND THE GLOBAL FOOD CRISIS

Abstract

 The  article  describes  in  detail  the  complete  engineering  methodology  for  the 
verification  calculation  of  steel  grain  storage  structures  based  on  the  pan-European  Eurocode 
standardisation system in accordance with the provisions of DBN B.2.6-221:2021 and DSTU-N B 
EN  1991-4.  The  emphasis  of  the  work  is  on  determining  the  mechanisms  for  regulating  the 
reliability of grain storage structures within the framework of the application of semi-probabilistic 
calculation  in  the  form  of  the  limit  state  method.  To  assess  the  stress-strain  state  of  individual 
structural elements of the silo, two methods were used: the direct method of finite element analysis 
without taking into account the effects of geometric and physical nonlinearity and the theoretical 
method  based  on  the  membrane  theory  in  a  linear-elastic  formulation  assuming  linear-elastic 
material characteristics and the linear theory of small deformations. The practical implementation of 
the methodology was tested on the example of real steel silo structures. It is established that the 
change in the level of reliability of steel grain storage structures within the framework of the limit 
state  method  is  carried  out  through  a  system  of  partial  coefficients  that  take  into  account  the 
stochastic  properties  of  external  influences,  variability  of  material  characteristics,  types  of 
calculations,  the  degree  of  importance  of  structural  elements  in  the  structure  and  the  degree  of 
responsibility  of  the  silo  as  part  of  the  enterprise.  The  specified  values  of  the  partial  reliability 
factors  are  governed  exclusively  by  the  regulatory  requirements  and  guidelines  of  the  national 
annex and cannot be adjusted by the design specification. The given values of the coefficients are 
limited  to  limit  state  checks  on  the  bearing  capacity  and  serviceability  of  structures  under  static 
load, including cases where the dynamic impact is assessed using equivalent quasi-static loads with 
appropriate amplification factors.