Effects of Soil-structure Interaction on Free Vibrations of Industrial Chimneys via Dynamic Stiffness Formulations

Year 2018, Volume: 2 Issue: 2, 79 - 85, 01.12.2018

Baran Bozyigit Yusuf Yesilce

Abstract

In this study, free vibration analysis of an
industrial chimney is investigated considering soil-structure interaction (SSI)
using dynamic stiffness method (DSM). The chimney is modeled as a Timoshenko
beam with constant cross-section. One rotational and one horizontal linear
spring are used to model foundation flexibility for different soil conditions.
The dynamic stiffness formulations are derived by using end forces and end
displacements of chimney. Different soil shear modulus values are used to
reveal their effects on free vibrations of chimneys considering SSI. The DSM
results are tabulated with exact analytical solution results where a very good
agreement is observed. Several mode shapes are plotted.

Keywords

Chimney, dynamic stiffness method, free vibration

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