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Pseudo Static Tests of High Ductile Concrete Short Columns Failed in Shear-bond
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    Abstract:

    To study the seismic performance of high ductile concrete (HDC) short columns failed in shear-bond mode,seven HDC short columns and one RC short column were tested under pseudo static load. The effects of axial load ratio and stirrups ratio on the hysteresis behavior, shear capacity, deformation capacity and energy dissipation capacity of the HDC short columns were studied. The experimental results indicate that all the RC short column and HDC short columns were failed in shear-bond,the concrete cover of the RC short column was severely crushed after the bond cracks were fully developed. For the HDC short columns,the bond cracks were effectively confined by the fiber bridging effect and thus no crushing of HDC covers was observed,which indicated the HDC short columns were failed in shear-bond with ductility. Compared with the HDC short column,the deformation capacity and energy dissipation capacity of the HDC short columns were significantly improved. The increase of ultimate displacement was 43%~112% and the cumulative energy dissipation increase at the ultimate displacement was 39%~184%. In addition, the drift ratios of HDC short columns were larger than that of the RC column in different performance levels,which was good for achieving performance based seismic design.

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  • Online: March 26,2019
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