Flexural Strength and Ductility of High-Strength R/C Columns subjected to Earthquake Loadings

지진하중을 받는 고강도 콘크리트 기둥의 휨강도와 연성

With the increase in the use of High-Strength Concrete(HSC) despite the its weakness like brittle characteristic, it is important to improve the performance of HSC columns, nowadays. Therefore, it is common to use higher strength steel in HSC for the purpose of ductility and strength improvement. This experimental study was set up to investigate the inelastic behavior of HSC(700kg/$cm^{2}$) columns subjected to combined axial and repeated lateral loads. Effects of key variables such as the volumetric ratio of transverse reinforcement, tie configuration and tie yield strength are studied in this research program. Test results indicate that inelastic response of HSC columns improve with proper confinement of core concrete. Increasing the amount of transverse reiuorement results in increased ductility.