An Experimental Study on the Stress-Strain Relationship of Concrete Columns Confined with Composite Materials

복합재료에 의하여 구속된 콘크리트 기둥의 응력-변형률 관계에 대한 실험적 연구

The stress-strain curve of concrete confined with both lateral ties and carbon fiber sheet(CFS) is different to that of concrete confined with only lateral ties or CFS. The objective of this study is to investigate the stress-strain relation of reinforced concrete columns confined by composite material. The main variable of the specimens was the content rate of lateral ties to CFS. In the test a total 24 rectangular specimens, which are all 148$\times$148$\times$300mm size. The test results indicated that while the compressive strength of specimens confined with both lateral ties and CFS increased proportionally to the aided amount of two materials, the maximum strain of specimens depended on the larger strain of lateral ties or CFS.