Flexural Fatigue Damage Evolution for Partially High Percentage Fiber Reinforced Concrete

Abstract:

Partially High Percentage Fiber Reinforced Concrete (PHPFRC) is a kind of cement composite in which fibers are concentrated with high volume fraction in the tension region of the component under bending. Therefore, PHPFRC possesses much higher load bearing capacity, rigidity, fatigue and fracture properties than conventional steel fiber reinforced concrete (SFRC) while its cost is similar to that of SFRC. In this paper, the fatigue test of PHPFRC is carried out to gain its flexural fatigue damage evolution rule. It is found from the test that, PHPFRC have long post-crack fatigue life and its fatigue damage is tough damage. Based on the continuum damage mechanics and fatigue behavior of the specimens, a fatigue damage variable D for PHPFRC is defined and the elementary form of damage evolution function is determined. For the specimens in which average fiber volume fraction are 1.2% and local fiber volume fraction are 10%, the function parameters and the damage threshold value are given according to the test results.

• Periodical: Key Engineering Materials (Volumes 324-325)
• Pages: 827-830
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.324-325.827
• Online since: November 2006
• Authors: Cheng Yi, Shi Zhao Shen, He Ping Xie, Chang Jun Wang
• Keywords: Damage, Fatigue, Partially High Percentage Fiber Reinforced Concrete (PHPFRC)

References

[1] Cheng Yi, Shi-zhao Shen. Study on flexural properties of partially high volume fraction fiber reinforced concrete components[J]. Industrial Construction, 1998, (8): 1-5. (in Chinese).

[2] Cheng Yi, He-ping Xie, Shi-zhao Shen, Rui Xu. Flexural Fatigue Property of Partially High Percentage Fiber Reinforced Concrete. Proceeding of the International Symposium on Innovation & Sustainability of Structures in Civil EngineeringMVol. 3M2005MNanjing, 2209-2222.

[3] Cheng Yi. A study on fatigue and fracture properties of partially high volume fraction fiber reinforced concrete and its application[D]. PhD Dissertation of Harbin University of Civil and Architecture, (2000).

[4] Jean Lemaitre. A curse on damage mechanics[M]. Springer-Verlag, (1992).

[5] J. L. Chaboche. Nucl. Eng. Design, 1981, 64, 233~247.

[6] Wang J. Int. J. Damage mech., 1992, 1(2): 237-244.

[7] Cheng Yi, Shi-zhao Shen, He-ping Xie. China Civil Engineering Journal, 2000, 34(6): 29-33, 37. (in Chinese).