Journal of South China University of Technology(Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (4): 13-18.

• Mathematics • Previous Articles     Next Articles

Experimental Investigation into Flexural Behavior of Fiber-Modified Concrete Beam Strengthened with CFS/GFS

Guo Yong-chang1  Huang Pei-yan1  Li Li-juan2  Zhu Jiang2  Liu Feng2   

  1. 1.Coilege of Traffic and Communications,South China UniV.of Tech.,Guangzhou 510640,Guangdong,China;2.Facuhy of Construction Engineering,Guangdong Univ.of Teeh.,Guangzhou 510006,Guangdong,China
  • Received:2005-09-02 Online:2006-04-25 Published:2006-04-25
  • Contact: 郭永昌(1974-)，男，博士生，讲师，现就职于广东工业大学建设学院，主要从事桥梁力学研究. E-mail:gy-cgdut@163.eom
  • About author:郭永昌(1974-)，男，博士生，讲师，现就职于广东工业大学建设学院，主要从事桥梁力学研究.
  • Supported by:

    国家自然科学基金资助项目(10272047)；广尔省教育厅“千百十工程”资助项目(Q02o94)；广东省建设厅资助项目(200391)

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Abstract:

Test analvses are carried out to reveal the flexural behaviours of polypropylene fiber and steel fiber-modi-fied concrete beams strengthened with mixed carbon fiber sheets(CFS)and glass fiber sheets(GFS).The crack and its development,as well as the rigidity variation after the strengthening are then analyzed.Tested results show that(1)polypropylene fibers and steel fibers can postpone the appearance of mierocracks in concrete,control the develoDment of cracks and imlclrove the concrete strength; (2)the concrete beam modified with hybrid fibers are superior to that modified with single fiber;(3)the strengthening effect greatly depends on the strengthened fiber sheets;and(4)the concrete beams strengthened with CFS/GFS is effective and is helpful to improve the tough-ness,reduce the cost and enhance the load bearing capacity of the beam.

Key words: hybrid fiber-concrete, hybrid strengthening, flexural behavior