The loading behaviors of the confined concrete
columns under uni- axial compression can be divided into three phases.
Furthermore the impact of corrosion on ductility loss, reduced low-cycle fatigue life and inelastic buckling of vertical reinforcement, and corrosion induced damage to cover and core confined concrete
Table 2: Calculation Results of L-Anchor in Confined Concrete
Equations (1) and (2) have been used to respectively obtain the confined concrete
compressive strength [f.
c] is the radius of the rounded corners and A is the cross-section area of confined concrete
, as shown in Figure 1.
An analytical model for stress-strain behavior of confined concrete
, Journal of Engineering Structures 27: 1040-1051.
In this numerical study of confined concrete
columns, the behavior of concrete core is modeled by the stress-strain relationship of confined concrete
, whereas for the cover, as unconfined concrete.
They reported that FRP confined concrete
increased the strength and ductility of the column.
2008) performed 46 tests on thin-walled steel tube confined concrete
stub columns subjected to axial compression to assess effects of sectional type, local compression area ratio and steel tube width-to-wall thickness ratio on the behaviour of the columns.
The configuration of transverse reinforcement reflects the effectively confined concrete
Most of the results for FRP confined concrete
and theoretical models published in the literature are based on short stubs for which slenderness ratio is very minimal.
Saatcioglu and Razvi  tested and observed the ductile behavior of confined concrete
columns with the strength up to 120 MPa.