Title:
Structural Performance of Reinforced Concrete Columns With Different Grade Longitudinal Bars
Author(s):
Fumio Watanabe, J. Y. Lee, and Minehiro Nishiyama
Publication:
Structural Journal
Volume:
92
Issue:
4
Appears on pages(s):
412-418
Keywords:
columns (supports); ductility; moment-curvature relationship; Structural Research
DOI:
10.14359/1022
Date:
7/1/1995
Abstract:
A new reinforcing method to improve the inelastic behavior of reinforced concrete columns is proposed. The method combines use of high- strength and ordinary strength longitudinal bars. When the column is subjected to bending moment, the ordinary strength longitudinal bars yield first and then the high-strength bars yield later in large post-yield range. Up to the stage of yielding of the high-strength bars, the column does not show significant degradation of load-carrying capacity. To confirm the advantages of the new reinforcing method, flexural analyses on reinforced concrete columns with different grades of longitudinal bars were conducted. The results of the analysis indicate that the combined use of different grades of longitudinal bar improves the inelastic behavior of reinforced concrete columns.