Analysis and Design of Concrete Columns for Confinement

An analytical procedure was developed to model formation and progression of flexural hinging in reinforced concrete columns. The procedure was employed to demonstrate second order inelastic analysis of concrete columns under monotonically increasing lateral loads. Other relevant features of inelastic column analysis were also incorporated, including concrete confinement, reinforcement strain hardening, bar buckling and anchorage slip. The analysis procedure has been verified extensively against experimental data, and used to illustrate a displacement-based design procedure for column confinement. Furthermore, a set of column analyses was conducted to develop design aids for column confinement. The amount, grade, spacing and arrangement of confinement reinforcement can be selected from these design aids for expected levels of lateral drift and axial compression.