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Effect of Confined High-Strength Concrete Columns
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 Title & Authors
Effect of Confined High-Strength Concrete Columns
Van, Kyung-Oh; Yun, Hyun-Do; Hwang, Sun-Kyoung;
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The moment-curvature envelope describes the changes in the flexural capacity with deformation during a nonlinear analysis. Therefore, the moment-curvature analysis for reinforced concrete columns, indicating the available flexural strength and ductility, can be conducted providing the stress-strain relation for the concrete and steel are known. The moments and curvatures associated with increasing flexural deformations of the column may be computed for various column axial loads by incrementing the curvature and satisfying the requirements of strain compatibility and equilibrium of forces. Clearly it is important to have accurate information concerning the complete stress-strain curve of confined high-strength concrete in order to conduct reliable moment-curvature analysis that assesses the ductility available from high-strength concrete columns. However, it is not easy to explicitly characterize the mechanical behavior of confined high-strength concrete because of various parameter values, such as the confinement type of rectilinear ties, the compressive strength of concrete, the volumetric ratic and strength of rectangular ties. So a stress-strain model is developed which can simulate complete inelastic moment-curvature relations of high-strength concrete columns.
moment-curvature;confined concrete;stress-strain model;high-strength concrete;
 Cited by
ACI-ASCE Committee 441, 'High-Strength Concrete Columns; State of the Art,' ACI Structural Journal, Vo1.94 No. 3, May-June 1997, pp.323-335

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