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论文类型：期刊论文

发表时间：2010-08-01

发表刊物：15th International Conference on Composite Structures

收录刊物：SCIE、EI、CPCI-S

卷号：92

期号：9,SI

页面范围：2083-2089

ISSN号：0263-8223

关键字：Hybrid fiber; SCC; Shear toughness; Failure mode; Shear strength; RC beam

摘要：In this paper, a newly developed method of evaluating the shear toughness of fiber reinforced RC beams in terms of its post-peak nominal average equivalent shear strength was investigated. This method is simple and the advantages are significant.
   Based on the investigation on the workability of hybrid fiber reinforced self-compacting concrete (HFRSCC), this paper analyzed the influence of various fiber types, including steel macro-fiber and hybrid fiber (macro-steel fiber+macro plastic fiber) on the shear strength and shear toughness of RC beams. The major test variables are the fiber contents, fiber types and stirrup ratios. The effects of stirrups and hybrid fibers on improving of beam toughness by the novel method are compared. The results indicate that hybrid fibers can evidently enhance both the shear toughness and the ultimate shear bearing capacity. (C) 2009 Elsevier Ltd. All rights reserved.