Experimental study on eccentric compression behavior of steel-FRP composite bars RC columns subjected to chloride corrosion
In order to investigate the eccentric compression behaviors of steel-FRP composite bar(SFCB)reinforced concrete(RC)columns subjected to chloride corrosion,the mechanical experiments of chloride corroded SFCB and SFCB RC eccentric compression columns were conducted.The effect of reinforcement type,reinforcement ratio,eccentricity,slenderness,stress level and corrosion duration on bearing capacity,deformation,crack and failure pattern were investigated.The results show that the strength retention ratio of reinforcement decreases with the increase of corrosion duration,the ultimate strengths of steel bar,SFCB and FRP bar decreased 12.2%,9.9%and 3.6%respectively.With the increase of steel content of reinforcement,the bearing capacity of SFCB RC eccentric compression column increases while the deformation decreases gradually.The ultimate bearing capacity of corroded steel bar,SFCB and FRP specimens maximally decreases 16.6%,12.4%and 7.2%respectively,when compared with those of uncorroded specimens.SFCB RC columns exhibit good deflection and crack resistance.
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