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不同屈服点钢筋混凝土柱耗能性能的试验研究

         

摘要

This paper presents a kind of reinforced concrete columns which have different yield points steels. Four stalks of columns are designed in paper, ordinary reinforced concrete column, disposed with the low yield point steel and high-toughness concrete column, disposed with the low yield point steels, reinforced steel bending and high-tough- ness concrete column,the low yield point steels and reinforced steel side-by-side high-toughness concrete column. Study on failure mode,hysteretic characteristics,energy dissipation capacity, stiffness degradation of different yield points steels reinforced concrete columns through conducting a low-cycle reversed loading experiment to four stalks of columns. Results shows that when different yield point reinforced concrete columns are in the elastic stage, low yield point reinforced steel can effectively absorb the earthquake energy due to plastic deformation, damping coeffi- cient has improved greatly than ordinary reinforced concrete column. But high yield point reinforced steel still is in elastic stage, its stiffness did not degenerate obviously which can ensure strength of structure.%提出一种不同屈服点钢筋混凝土柱,共设计了4根柱:普通钢筋混凝土柱,配置低屈服点钢和高韧性混凝土柱,配置低屈服点钢、普通钢筋弯起和高韧性混凝土柱,低屈服点钢和普通钢筋并排的高韧性混凝土柱,通过对4根柱进行低周反复加载试验,研究了不同屈服点钢筋混凝土柱的破坏形态、滞回特性、耗能能力和刚度退化。研究表明:不同屈服点钢筋混凝土柱在弹性阶段时,由于低屈服点钢筋发生塑性变形可以有效吸收地震能量,阻尼系数较普通钢筋混凝土柱有较大提高,而高屈服点钢筋仍处于弹性阶段,刚度没有明显退化,可以保证结构的强度。

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