Seismic Performance of Reinforced Concrete Columns: P-Δ Effect

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Title: Seismic Performance of Reinforced Concrete Columns: P-Δ Effect

Author(s): S. Bae and O. Bayrak

Publication: Special Publication

Volume: 236

Issue:

Appears on pages(s): 61-80

Keywords: aspect ratio; columns; curvature ductility; deformation capacity; displacement ductility; drift capacity; P-Δ effect

Date: 5/1/2006

Abstract:
The research reported herein is aimed at identifying the relationship between curvature ductility, displacement ductility and drift capacity of reinforced concrete columns. In order to achieve this goal and to study the effects of aspect ratio (L/h) on the seismic performance of columns, an analytical procedure that can be used to evaluate the deformation capacity of reinforced concrete columns is developed. Experimentally verified constitutive models for reinforcing bar slip, inelastic buckling of bars, and confinement of concrete are used. The P-? effect is also taken into account. Model verification is performed by predicting the behavior of columns tested by different researchers. The effect of longitudinal reinforcement ratio, volumetric ratio of confining reinforcement, column aspect ratio, and axial load level on the relationship between various ductility parameters is evaluated and discussed.