高温中纤维纳米混凝土单轴受压应力-应变关系
发布时间:2018-08-04 12:26
【摘要】:通过纤维纳米混凝土棱柱体试件在25~800℃高温中的单轴受压试验,研究了温度、钢纤维体积率、纳米二氧化硅和纳米碳酸钙掺量对纤维纳米混凝土高温中轴压性能的影响。结果表明,随温度升高,纤维纳米混凝土峰值应力和初始弹性模量显著降低,峰值应变明显增大;随钢纤维体积率增大,高温中纤维纳米混凝土峰值应力和峰值应变不断提高,初始弹性模量有所下降;随纳米材料掺量增加,高温中纤维纳米混凝土峰值应力、峰值应变和初始弹性模量均呈增大的趋势,纳米二氧化硅的效果好于纳米碳酸钙。在分析试验结果的基础上,提出了考虑温度、纤维和纳米材料影响的高温中纤维纳米混凝土峰值应力、峰值应变和初始弹性模量的计算公式以及高温中纤维纳米混凝土单轴受压应力-应变关系式。
[Abstract]:The effects of temperature, volume ratio of steel fiber and content of nano-silica and calcium carbonate on axial compression properties of fiber nanocrystalline concrete at high temperature were studied by uniaxial compression test of fiber nanocrystalline concrete prisms at 25 ~ 800 鈩,
本文编号:2163874
[Abstract]:The effects of temperature, volume ratio of steel fiber and content of nano-silica and calcium carbonate on axial compression properties of fiber nanocrystalline concrete at high temperature were studied by uniaxial compression test of fiber nanocrystalline concrete prisms at 25 ~ 800 鈩,
本文编号:2163874
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