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（1 上海大學(xué)土木工程系  200072； 2 上海市應(yīng)用數(shù)學(xué)和力學(xué)研究所  200072）

［提要］  分別進(jìn)行了摻入鋼纖維、碳纖維及兩種纖維混雜對混凝土抗壓性能增強(qiáng)效果的試驗(yàn)研究。討論了鋼纖維摻量、分布形式，以及碳纖維長徑比對混凝土抗壓性能的影響。并將鋼纖維和不同長徑比的碳纖維進(jìn)行混雜組合，研究了鋼-碳混雜纖維對混凝土強(qiáng)度和變形能力的影響。試驗(yàn)結(jié)果表明，鋼纖維分布形式的不同對混凝土抗壓強(qiáng)度有一定影響；碳纖維長徑比對混凝土抗壓性能的影響很大；鋼纖維與短碳纖維混雜組合有效地改善了混凝土的抗壓性能。

［關(guān)鍵詞］  鋼纖維  碳纖維  混雜纖維  混凝土  延性比提高率

Experimental Study on Compression Behavior of Steel and Carbon Fiber Reinforced Concrete/Liu Tao1,2, Feng Wei2,Zhang Zhimei1,2 (1 Department of Civil Engineering, Shanghai University, Shanghai  200072, China; 2 Shanghai Institute of Applied Mathematics and Mechanics， Shanghai  200072, China)

Abstract:The behavior of steel, carbon and their hybridized fiberreinforced concrete is studied experimentally. The effect of content, orientation of steel fibers and length/diameter aspect ratio of carbon fibers on concrete is discussed, as well as that of their hybridized fibers. Test results show that compressive strength of concrete was influenced by the orientation of steel fibers; the compression behavior of concrete was affected greatly by the aspect ratio of carbon fibers, and that can be improved by the hybridized steel and short carbon fibers.

Keywords:steel fiber；carbon fiber；hybridized fiber；concrete；ductile effectiveness

*上海市青年科技啟明星資助項(xiàng)目(07QA14025)。