Influences of Rebar Corrosion on Seismic Behavior of Circular RC Columns

LI Jin-bo, GONG Jin-xin

China Journal of Highway and Transport ›› 2008, Vol. 21 ›› Issue (4) : 55-60.

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China Journal of Highway and Transport ›› 2008, Vol. 21 ›› Issue (4) : 55-60.

Influences of Rebar Corrosion on Seismic Behavior of Circular RC Columns

  • LI Jin-bo, GONG Jin-xin
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Abstract

A cyclic horizontal loading test was carried out using circular RC columns damaged by different degrees of rebar corrosion. In the experiment, the seismic behaviors of circular corroded RC columns under different degrees of axial loads, such as bearing capacity, stiffness, ductility and dissipated energy capacity were studied, and the hysteretic and skeleton curves for the circular corroded RC columns were obtained. Test results show that the stiffness, ductility and energy dissipation capacity, as well as areas of hysteresis loops of circle corroded RC columns can be significantly reduced along with the increase of rebar corrosion extent and degrees of axial load. If the circular RC columns contain extremely corroded rebars, the column damaged by plastic failure will be prone to brittle shear failure under seismic loads.

Key words

bridge engineering / circular RC column / cyclic horizontal loading test / seismic beha-vior / rebar corrosion / ductility

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LI Jin-bo, GONG Jin-xin. Influences of Rebar Corrosion on Seismic Behavior of Circular RC Columns[J]. China Journal of Highway and Transport, 2008, 21(4): 55-60

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