Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (2): 18-22.

• Mechanics • Previous Articles     Next Articles

Fatigue Damage Behavior of Steel Fiber-Reinforced and Polymer-Modified Concrete

Liu Yi-ping  Tang Li-qun  HuαngXiao-qing  Liu Ze-jia   

  1. School of Traffic and Communications , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-03-28 Online:2007-02-25 Published:2007-02-25
  • Contact: 刘逸平(1974-)，男，博士，讲师，主要从事路面力学和桥梁力学研究。 E-mail:tcypliu@scut. edu.cn
  • About author:刘逸平(1974-)，男，博士，讲师，主要从事路面力学和桥梁力学研究。
  • Supported by:

    广东省自然科学基金资助项目(05006591)

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Abstract:

The bending fatigue damage behaviors of a new kind of material-steel fiber-reinforced and polymer-modified concrete was experimentally and theoretically investigated , and the results were compared with those of steel fiber-reinforced concrete. Then , by reasonably defining damage factors , the fatigue damages and the corre-sponding evolution principles of the new material and the steel fiber-reinforced concrete were measured by experiments.A new fatigue damage evolution equation was proposed according to the fatigue accumulative damage theory ,the effectiveness of which was verified by experimental results. Finally , the fatigue damage evolution behaviors of the two above-mentioned materials under the same stress were analyzed and compared. The results show that the steel fiber-reinforced and polymer-modified concrete is of better fatigue resistance than the steel fiber-reinforced concrete.

Key words: steel-fiber reinforcement, polymer, concrete, bending fatigue, damage