Title: Redistribution of internal forces in reinforced concrete columns strengthened by jacketing

Author(s): A. Halicka

Publication: KILW

Volume: 51

Issue: 1

Appears on pages(s): 43-63

Keywords: reinforced concrete,columns,jacketing

DOI:

Date: 1/1/2005

Abstract:
The subject of the article is the stress-strain state in an axially loaded reinforced concrete column, strengthened with longitudinally and spirally reinforced jacket. Three variants of jackets were considered: made of ordinary, shrinkage-compensating and expansive concrete. A column like this is a composite structure consisting of two different concretes and of reinforcement. The analytical model of this structure was built up, taking into account rheological phenomena, triaxial compression of the original column and non-linear effects. This model makes it possible to determine the longitudinal, radial and spiral stresses in the constituent elements of the strengthened column. It has been found that only expansive concrete jacketing is an active strengthening since it causes a redistribution of the internal forces resulting in relieving the core.