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进行了5个1/2缩尺的再生混凝土短柱抗震性能对比试验,模型DZB-1、DZB-2、DZB-3分别为配箍率0.4%、0.9%和1.29%的再生混凝土短柱,模型DZB-4、DZB-5为带交叉筋再生混凝土短柱。分析了各模型的承载力、刚度及其退化过程、滞回特性、位移延性、耗能能力、破坏形态。试验及分析结果表明:随着配箍率的增加,再生混凝土短柱的延性、承载力、耗能提高,但配箍率超过一定限度后,试件的延性、承载力、耗能等提高有限。
A comparison of the seismic performance of five short concrete columns with ½ scale was carried out. The model DZB-1, DZB-2 and DZB-3 were short columns of recycled concrete with the stirrup ratios of 0.4%, 0.9% and 1.29% Models DZB-4 and DZB-5 are short columns of recycled concrete with cross-bar. The bearing capacity, stiffness and degradation process, hysteretic characteristics, displacement ductility, energy dissipation capacity and failure mode of each model are analyzed. The experimental results show that the ductility, bearing capacity and energy dissipation of recycled concrete short columns increase with the increase of stirrup ratio. However, when the stirrup ratio exceeds a certain limit, the ductility, bearing capacity and energy consumption of the specimens are limited .