銹蝕鋼筋混凝土梁地震損傷分析
[Abstract]:The seismic damage analysis of 12 corroded reinforced concrete beams is carried out, and the variation curve of seismic damage index with loading cyclic level, namely D-N curve, is obtained. The evolution law of seismic damage of corroded reinforced concrete beams, the influence of corrosion rate of steel bars and the failure form of specimens on the seismic damage index are analyzed. The results show that the seismic damage index of corroded reinforced concrete beams increases with the increase of cyclic level, and the growth rate of seismic damage index increases gradually. At the same cyclic level, the seismic damage index of corroded beams increases with the increase of corrosion rate. However, for specimens of corroded concrete beams with corrosion rate less than 5%, corrosion improves the bond behavior between reinforcement and concrete. The damage index is slightly lower than that of non-corroded beams. The seismic damage evolution of concrete beams corroded by longitudinal and stirrups at the same time is similar to that of concrete beams with only stirrups. With the increase of corrosion rate, the corroded reinforced concrete beams will change from flexural failure to shear failure. Compared with the corroded beams with bending failure, the seismic damage index of corroded beams is smaller when shear failure occurs. However, most of the damage indexes were greater than 0.6; In the seismic damage model of corroded reinforced concrete beams, the amplitude of cyclic loading displacement plays a major role in controlling the damage index.
【作者單位】: 長安大學(xué)建筑工程學(xué)院;
【基金】:國家自然科學(xué)基金項(xiàng)目資助(51578077) 陜西省自然科學(xué)基金項(xiàng)目(2016JM5041) 中央高?蒲袠I(yè)務(wù)費(fèi)專項(xiàng)經(jīng)費(fèi)項(xiàng)目資助(310828152017,310828163410)
【分類號(hào)】:TU375.1
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