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关于反复加荷对极限承载能力和对8个偏心加荷的钢筋混凝土柱的变形和刚度的影响通过试验进行了研究.反复加荷值在柱子短期承载能力的50%的下限值和它的75%、85%或接近95%的上限值之间变化.荷载上限值等于或小于0.85的柱子,在反复加荷6000次循环以后没有失去稳并具有看来不受先前的反复加荷历史影响的短期极限承载能力值.尽管加荷过程复杂,观测到的承载能力与利ACI 318-71计算得出的承载能力相比的结果良好.
The effect of repeated loading on the ultimate load-carrying capacity and the deformation and stiffness of eight eccentrically loaded reinforced concrete columns was investigated through experiments. The value of repeated loading on the lower limit of the column’s short-term carrying capacity of 50% and its Changes between 75%, 85%, or near 95% of the upper limit value. Columns with an upper load limit of 0.85 or less have not lost their stability after 6,000 cycles of repeated loading and appear to be unaffected by previous repeated loading. Historically impacted short-term limit carrying capacity values. Although the loading process is complex, the observed bearing capacity is comparable to the bearing capacity calculated by ACI 318-71.