CALCULATION OF REINFORCED CONCRETE CHIMNEY BASED ON DIAGRAMMS OF CONCRETE AND STEEL DEFORMATION

Abstract

The method for calculation of reinforced concrete chimney shafts using the diagrams of concrete
and steel deformation is described. The design diagram is accepted in the form of a constrained
in the base cantilever bar. Moments of flection are specified on the basis of calculations according to
a deformation scheme (geometrical nonlinearity) taking into consideration nonlinearity of concrete
and steel deformation (physical nonlinearity). The problem formulation, traditional physical dependences
fully meet the requirements of current design norms, which in its turn offers a possibility in
principle to put the developed calculation method and a computer program into practice.

The calculation examples compared to existing methods for calculation of chimneys, which
detected significant drawbacks of the existing method and shown prospects of applying the suggested
calculation method, are given.
Keywords: chimneys, physical nonlinearity, geometrical nonlinearity, deformation diagrams.