탄소섬유시트로 보강된 콘크리트 기둥의 압축성능 평가를 위한 실험연구
Experimental Study on Compressive Strength of Concrete Column Retrofitted by Carbon FRP Sheet
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초록
In 1980 and 1990's most of residential buildings were constructed with relatively low strength concrete of 18 MPa. And, columns were designed considering only vertical loads. In this study, compressive strength tests for low strength RC columns retrofitted by carbon fiber sheets were carried out. Carbon fiber sheet provides constructability and high tensile strength as well as good corrosion resistance characteristics. A pair of carbon sheets were wrapped with ±60° angle with respect to longitudinal direction of RC column to increase structural capacity against axial and lateral load simultaneously. Strength and strain patterns and failure modes of specimens were analyzed and prediction equation of increased compressive strength of RC column confined by carbon fiber sheet was proposed based on regression analysis.
Abstract
In 1980 and 1990's most of residential buildings were constructed with relatively low strength concrete of 18 MPa. And, columns were designed considering only vertical loads. In this study, compressive strength tests for low strength RC columns retrofitted by carbon fiber sheets were carried out. Carbon fiber sheet provides constructability and high tensile strength as well as good corrosion resistance characteristics. A pair of carbon sheets were wrapped with ±60° angle with respect to longitudinal direction of RC column to increase structural capacity against axial and lateral load simultaneously. Strength and strain patterns and failure modes of specimens were analyzed and prediction equation of increased compressive strength of RC column confined by carbon fiber sheet was proposed based on regression analysis.
참고문헌 (4)
- 이경훈, "카본시트튜브로 구속된 압축재의 성능평가", 구조물진단학회지, 10(3), pp.152~158 (2006), 한국구조물진단유지관리공학회
- Mohamed Saafi, "Behavior of Concrete Columns Confined with Fiber Reinforced Polymer Tubes", ACI Materials Journal, 97(4), pp.500~509 (1999)
- S. Matthys, "Axial Load Behavior of Large-Scale Columns Confined with Fiber-Reinforced Polymer Composites", ACI Structural Journal, 102(2), pp.258~267 (2005)
- Won-Kee Hong, "Behavior of Concrete Columns Confined by Carbon Composite Tubes", Canadian Journal of Civil Engineering, 31(2), pp.178~188 (2004)