Research on Fatigue Reliability and Fatigue Life Prediction of Recycled Aggregate Concrete

ZHONG Chuheng; LONG Yuhua; ZHOU Jinzhi; WU Weixi

doi:10.13204/j.gyjzG21080909

Volume 52 Issue 4

Jul. 2022

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ZHONG Chuheng, LONG Yuhua, ZHOU Jinzhi, WU Weixi. Research on Fatigue Reliability and Fatigue Life Prediction of Recycled Aggregate Concrete[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(4): 140-145,83. doi: 10.13204/j.gyjzG21080909

Citation:

ZHONG Chuheng, LONG Yuhua, ZHOU Jinzhi, WU Weixi. Research on Fatigue Reliability and Fatigue Life Prediction of Recycled Aggregate Concrete[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(4): 140-145,83. doi: 10.13204/j.gyjzG21080909

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Research on Fatigue Reliability and Fatigue Life Prediction of Recycled Aggregate Concrete

doi: 10.13204/j.gyjzG21080909

1. School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430070, China;
2. State Key Laboratory for Health and Safety of Bridge Structures, Wuhan 430034, China

Received Date: 2021-08-09
Available Online: 2022-07-25

Abstract

Abstract

The flexural fatigue tests of natural aggregate concrete (NAC) and recycled aggregate concrete (RAC) were investigated at three different stress levels (S=0.6, 0.7, 0.9) to study the fatigue properties and fatigue reliability of recycled aggregate concrete, the longitudinal strain and fatigue life at different stress levels were obtained. The two-parameter Weibull distribution was analyzed, and the S-N-P_f equation was established. And since the logarithmic fatigue life generally follows a lognormal distribution, based on the Miner fatigue model, the reliability formula was derived and the fatigue reliability was calculated. The results showed that under different stress levels, the fatigue life of RAC was smaller than that of NAC, the longitudinal strain of RAC was larger than that of NAC, the flexural fatigue resistance and the fatigue reliability of RAC were lower than that of NAC. It was assumed that the fatigue life obeyed the Weibull distribution, the predicted fatigue life under different reliability was closer to the critical value than if it obeyed the lognormal distribution in the analysis of NAC. The results were not much different in the analysis of RAC.
- recycled aggregate concrete,
- flexural fatigue life,
- two-parameter Weibull distribution,
- S-N-P_f equation,
- fatigue reliability,
- prediction of fatigue life

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References(19)

References

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