多尺度聚丙烯纤维混凝土弯曲疲劳寿命试验及数值模拟

doi:10.11896/cldb.22040023

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Abstract To study the flexural fatigue properties of multi-scale polypropylene fiber reinforced concrete, static load tests and flexural fatigue tests under different stress levels (0.75, 0.80, 0.85) of reference concrete, coarse polypropylene fiber reinforced concrete and multi-scale polypropy-lene fiber reinforced concrete were carried out. The flexural fatigue life equation was established, and the three-point flexural fatigue numerical simulation model of fiber reinforced concrete beam was established by combining ABAQUS and FE-Safe software. The results show that the incorporation of polypropylene fiber, especially multi-scale polypropylene fiber, significantly improves the flexural and fatigue resistance of concrete matrix. The lgS-lgN fatigue equation can be used for statistics the fatigue life of multi-scale polypropylene fiber reinforced concrete. According to the equation, the fatigue strength of multi-scale polypropylene fiber reinforced concrete under 2 million cyclic loading is the highest, which is 3.91 MPa. The predicted fatigue life of the three groups specimens is between the maximum and minimum values of the experimental results, and closes to the average value of fatigue life. The model provides a basis for the fatigue life prediction of multi-scale polypropylene fiber reinforced concrete.

Key words： multi-scale polypropylene fiber reinforced concrete flexural fatigue fatigue life prediction numerical simulation

Published: 25 February 2024 Online: 2024-03-01

CLC number:

TU502

Fund:National Natural Science Foundation of China (41772319, 52074042).

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	Articles by authors
	LIANG Ninghui
	MAO Jinwang
	YOU Xiufei
	LIU Xinrong
	ZHOU Kan

Cite this article:

LIANG Ninghui,MAO Jinwang,YOU Xiufei, et al. Flexural Fatigue Life Test and Numerical Simulation of Multi-scale Polypropylene Fiber Reinforced Concrete[J]. Materials Reports, 2024, 38(4): 22040023-8.

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http://www.mater-rep.com/EN/10.11896/cldb.22040023 OR http://www.mater-rep.com/EN/Y2024/V38/I4/22040023

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