Sciences & technologie. B, Sciences de l’ingénieur
Volume 0, Numéro 21, Pages 45-52
2004-06-30
Strength And Ductility Enhancement In Confined Reinforced Concrete Columns Proposed Stress Strain Model
Authors : Bousalem B . Chikh N .
Abstract
In order to estimate the flexural behavior of reinforced concrete members, the stress strain behavior of the constituent materials must be well established. The behavior of confined concrete is important to the designer in order to determine the quantity of the confining steel required in reinforced concrete column sections to achieve the ultimate curvatures required in seismic design for ductility. The confinement steel requirements for confined concrete are subject of deficiency in current seismic code RPA 99. The objective of this study is to develop an analytical model for the confinement mechanism in reinforced rectangular concrete columns. The model is based on some existing experimental evidence and on a number of test results reported in the past 20 years. The main variables examined in the model include the volumetric ratio of lateral reinforcement, the characteristics of steel and concrete and the effectiveness confinement coefficient.
Keywords
Confined concrete, Ductility, Confinement models, Gain in stress, Gain in strength.
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