|
Title |
Confinement Effect by Plate Type Lateral Reinforcement and Investigation of the Possibility for Use of High Strength Steel Bars in Reinforced Concrete Columns
|
|
DOI |
https://doi.org/10.4334/JKCI.2012.24.6.643 |
|
Keywords |
횡구속 효과 ; 탄소섬유쉬트 ; 고강도 철근 ; 철근콘크리트 기둥 confinement effect ; carbon fiber sheets(CFS) ; high-strength steel bar ; reinforced concrete(RC) columns |
|
Abstract |
The limitation of the yield strength in reinforced concrete columns is given for the effective use of high-strength steel bar, because very high-strength steel bar does not yield while concrete fails in compression. In order to overcome this limitation, it is required to increase peak strain of the concrete. The objective of this study is to examine the confinement effect of plate type lateral reinforcement in reinforced concrete columns. From this experimental study, the reinforced concrete columns confined by plate type carbon fiber sheets showed higher compressive strength and peak concrete strain comparing to the unconfined columns. The confinement effect is higher when cross-sectional type is a circular one than a square one. Moreover, the confinement effect was also higher for circular type confinement. Based on this study, high-strength steel bars with strength exceeding 800 MPa can be effectively used for reinforced concrete columns confined by plate type lateral reinforcements.
|