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剪切粘结破坏是钢筋混凝土压弯构件一种常见的震害形式,剪切粘结破坏柱刚度退化快、延性差、滞回曲线“捏拢”现象明显、耗能能力差,因此,有必要进一步研究钢筋混凝土柱剪切粘结破坏的影响因素,以避免此类震害的发生。该文通过试验数据和有限元模拟分析了面积配箍率、混凝土强度、轴压比、剪跨比、纵筋直径及加载方式对钢筋混凝土柱破坏形态的影响,结果表明钢筋混凝土柱易于发生剪切粘结破坏的条件为:面积配箍率较大、混凝土强度等级较低、轴压比0.1≤n≤0.5、剪跨比1.25<λ<2.5、配筋率较大且纵筋直径较大、低周往复荷载作用。
Shear bond failure is a common form of seismic damage for RC compression-bending members. Shear bond failure column has fast degradation of stiffness, poor ductility, obvious hysteresis curve and poor energy dissipation. , It is necessary to further study the factors that affect the shear bond failure of reinforced concrete columns in order to avoid the occurrence of such damage. In this paper, the effect of area ratio of stirrup, concrete strength, axial compression ratio, shear span ratio, longitudinal reinforcement diameter and loading mode on the failure morphology of reinforced concrete columns is analyzed by the experimental data and finite element simulation. The results show that the RC columns are prone to shear Cut bonding failure conditions: the area with a larger hoop ratio, lower concrete strength level, axial compression ratio 0.1 ≤ n ≤ 0.5, shear span ratio 1.25 <λ <2.5, the reinforcement ratio is larger and the longitudinal reinforcement diameter larger , Low cycle reciprocating load effect.