Bond Deterioration Of Corroded Reinforced Concrete Members And Its Effects On Bearing Capacity

The deterioration mechanism of the bond properties of corroded reinforced concrete members subjected to cyclic loading and its effects on bending and shear bearing capacity have been studied in the present thesis. The main contributions of this thesis are described in the following aspects:(1) Considering the effect of corrosion, a bond-slip constitutive model of corroded reinforced concrete members subjected to monotonic loading is proposed based on the existing meso-mechanical models of bond-slip at critical state.(2) Considering the hysteresis behavior of reinforced concrete members under cyclic loading, a bond-slip constitutive model of corroded reinforced concrete members subjected to cyclic loading is proposed based on the monotonic loading bond-slip model.(3) A flexural bearing capacity model of corroded reinforced concrete beam subjected to monotonic loading is proposed considering the changes of both the mechanical properties of steel and concrete and the bond behavior between them.(4) Considering the change of bond stress under corrosion and cyclic loading conditions, the change of the flexural bearing capacity of corroded reinforced concrete beam subjected to cyclic loading is predicted based on the proposed flexural bearing capacity model of corroded reinforced concrete beam.(5) Considering the effects of corrosion and cyclic loading, the change of shear bearing capacity of corroded reinforced concrete column subjected to cyclic loading is predicted based on the shear bearing capacity theory of un-corroded reinforced concrete members.