（1 上海大学土木工程系  200072； 2 上海市应用数学和力学研究所  200072）

［提要］  分别进行了掺入钢纤维、碳纤维及两种纤维混杂对混凝土抗压性能增强效果的试验研究。讨论了钢纤维掺量、分布形式，以及碳纤维长径比对混凝土抗压性能的影响。并将钢纤维和不同长径比的碳纤维进行混杂组合，研究了钢-碳混杂纤维对混凝土强度和变形能力的影响。试验结果表明，钢纤维分布形式的不同对混凝土抗压强度有一定影响；碳纤维长径比对混凝土抗压性能的影响很大；钢纤维与短碳纤维混杂组合有效地改善了混凝土的抗压性能。

［关键词］  钢纤维  碳纤维  混杂纤维  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

*上海市青年科技启明星资助项目(07QA14025)。