| Title |
Strength Evaluation on Concentrically Loaded High-Strength R/C Columns |
| Authors |
Ahn Jong-Mun ; Bahn Byong-Youk ; Shin Sung-Woo |
| Keywords |
high strength concrete column ; concentric compression ; tie reinforcement ; volumetric ratio |
| Abstract |
As the social demand is increasing in high-rise building, high-strength concrete(HSC) is issued. HSC has a lot of merits in strength. But, HSC show brittle failure mode which has to be enhanced in ductility. So, the ductility can be improved by confinement of transverse tie, which is affected by amount, spacing, strength and configuration of lateral reinforcement and compressive strength of concrete. ??An experimental study was conducted to investigate the behavior of reinforced concrete columns confined with various configuration of reinforcement. A total of 30 specimens were tested under monotonically increasing concentric compression. The test parameters included were the volumetric ratio of transverse reinforcement(ρh = 0.49～2.65), tie configuration(S-type, SO- type, SR-type) and concrete compressive strength(234, 437, 703kgf/cm2). Test results indicate that behavior of reinforced concrete columns is influenced on the tie configuration and concrete compressive strength with almost equal volumetric ratio of transverse reinforcement and approximately equal tie spacing, and on the volumetric ratio of transverse reinforcement. |