高溫中纖維納米混凝土單軸受壓應(yīng)力-應(yīng)變關(guān)系
發(fā)布時(shí)間:2018-08-04 12:26
【摘要】:通過纖維納米混凝土棱柱體試件在25~800℃高溫中的單軸受壓試驗(yàn),研究了溫度、鋼纖維體積率、納米二氧化硅和納米碳酸鈣摻量對(duì)纖維納米混凝土高溫中軸壓性能的影響。結(jié)果表明,隨溫度升高,纖維納米混凝土峰值應(yīng)力和初始彈性模量顯著降低,峰值應(yīng)變明顯增大;隨鋼纖維體積率增大,高溫中纖維納米混凝土峰值應(yīng)力和峰值應(yīng)變不斷提高,初始彈性模量有所下降;隨納米材料摻量增加,高溫中纖維納米混凝土峰值應(yīng)力、峰值應(yīng)變和初始彈性模量均呈增大的趨勢(shì),納米二氧化硅的效果好于納米碳酸鈣。在分析試驗(yàn)結(jié)果的基礎(chǔ)上,提出了考慮溫度、纖維和納米材料影響的高溫中纖維納米混凝土峰值應(yīng)力、峰值應(yīng)變和初始彈性模量的計(jì)算公式以及高溫中纖維納米混凝土單軸受壓應(yīng)力-應(yīng)變關(guān)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,
本文編號(hào):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,
本文編號(hào):2163874
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