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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2021, Vol. 40 ›› Issue (8): 2574-2583.

• Cement and Concrete • Previous Articles     Next Articles

Fatigue Performance Analysis of Steel Fiber Reinforced Concrete Beams Combined with Homogenization Theory

HE Zhengbo1, WANG Huiming1,2   

  1. 1. College of Civil Engineering and Architecture, Xinjiang University, Urumqi 830046, China;
    2. Xinjiang Key Lab of Building Structure and Earthquake Resistance, Urumqi 830046, China
  • Received:2021-03-10 Revised:2021-04-23 Online:2021-08-15 Published:2021-09-02

Abstract: Steel fiber reinforced concrete (SFRC) is widely used in engineering. To explore the internal mechanism of fatigue failure phenomenon of SFRC, Mori-Tanaka homogenization theory was used to predict the elastic modulus of SFRC with different steel fiber volume content. Based on the calculated results, a four-point bending finite element model of SFRC beam was established. Miner fatigue damage criterion was used to carry out bending static test and fatigue test of numerical simulation of the experiment. The simulation results are in good agreement with the relevant test results, which verifies the reliability of the model. The fatigue life and fatigue strength of SFRC beams were predicted by using fatigue analysis software. The influences of fiber content, size effect and fiber length on the fatigue life were analyzed. The results show that steel fiber greatly improves the fatigue life of concrete beams, and the lower the stress level and the greater the fiber content are, the higher the improvement range is. The size effect has a certain influence on the fatigue strength and fatigue life, but the influence on the fatigue performance decreases with the increase of component size. The longer the fiber length is, the better the fatigue performance of the SFRC beam is.

Key words: steel fiber reinforced concrete, homogenization theory, fiber length, fiber content, size effect, fatigue life, fatigue strength

CLC Number: