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http://dx.doi.org/10.4334/JKCI.2010.22.2.187

Longitudinal Reinforcement Ratio for Performance-based Design of Reinforced Concrete Columns  

Kim, Chang-Soo (Dept. of Architecture, Seoul National University)
Park, Hong-Gun (Dept. of Architecture, Seoul National University)
Publication Information
Journal of the Korea Concrete Institute / v.22, no.2, 2010 , pp. 187-197 More about this Journal
Abstract
The longitudinal reinforcement ratio for the performance-based design of columns was studied. Unlike the existing design codes using uniform minimum reinforcement ratio and effective stiffness for all columns, the longitudinal reinforcement ratio of columns was defined as the function of various design parameters. To evaluate the minimum reinforcement ratio, two conditions were considered: 1) prevention of passive yielding of compression re-bars due to the creep and shrinkage of concrete under sustained service loads; and 2) ultimate flexural strength greater than the cracking moment capacity to maintain the ductility of columns for earthquake design. In addition, the effective flexural stiffness of columns for structural analysis was determined according to the longitudinal reinforcement ratio. The design method addressing the three criteria was proposed. The proposed method was applied to a design example.
Keywords
reinforced concrete column; longitudinal reinforcement; creep and shrinkage; ductility; effective stiffness;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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