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高强再生混凝土柱大偏压性能试验研究

DOI: 10.13577/j.jnd.2015.0208, PP. 60-67

Keywords: 高强再生混凝土,,粗骨料取代率,压弯性能,重复荷载试验

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Abstract:

为了解再生粗骨料高强混凝土柱的压弯力学性能,进行了4根大尺寸钢筋混凝土柱大偏心受压重复荷载试验,包括方形与圆形两种截面柱,方形截面边长为600mm×600mm,圆形截面直径为675mm.研究变化参数为再生粗骨料取代率.在试验基础上,分析了其破坏特征、承载力、刚度及截面应变发展规律.结果表明,不同截面形式的再生粗骨料高强混凝土柱,其大偏压破坏过程、破坏形态、刚度退化、截面应变发展规律与普通混凝土柱的没有明显区别.参照现行混凝土结构设计规范的相关设计公式计算其极限承载力,计算结果与试验结果符合良好,计算精度能够满足工程要求.

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