[1] Xue Yanqing, Huang XiaomingQian Shunzhi, Ma TaoZou Xiangheng,. Fatigue reliability quantitative analysis of cement concretefor highway pavement under high stress ratio [J]. Journal of Southeast University (English Edition), 2012, 28 (1): 94-99. [doi:10.3969/j.issn.1003-7985.2012.01.016]

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Fatigue reliability quantitative analysis of cement concretefor highway pavement under high stress ratio()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

28

Issue:

2012 1

Page:

94-99

Research Field:

Traffic and Transportation Engineering

Publishing date:

2012-03-30

Info

Title:

Fatigue reliability quantitative analysis of cement concretefor highway pavement under high stress ratio

Author(s):

Xue Yanqing;  Huang XiaomingQian Shunzhi;  Ma TaoZou Xiangheng

School of Transportation, Southeast University, Nanjing 210096, China

Keywords:

cement concrete;  fatigue life;  fatigue damage;  probability density function;  high stress ratio;  fatigue reliability

PACS:

U416.21

DOI:

10.3969/j.issn.1003-7985.2012.01.016

Abstract:

In order to obtain the change law of the fatigue reliability of cement concrete for highway pavement under high stress ratios, first, the probability densities of monotonic random variables including concrete fatigue life are deduced. And then, the fatigue damage probability densities of the Miner and Chaboche-Zhao models are deduced. By virtue of laboratory fatigue test results, the fatigue damage probability density functions of the two models can be obtained, considering different stress ratios. Finally, substituting load cycles into them, the change law of cement concrete fatigue reliability about load cycles can be acquired. The results show that under the same stress ratio, with the increase in the load cycle, the fatigue reliability declines from almost 100% to 0% gradually. No matter under what stress ratio, during the initial stage of the load action, there is always a relatively stable phase for fatigue reliability. With the increase in the stress ratio, the stable phase gradually shortens and the load cycle corresponding to the reliability of 0% also decreases. In the descent phase of reliability, the higher the stress ratio is, the lower the concrete reliability is for the same load cycle. Besides, compared with the Chaboche-Zhao fatigue damage model, the Miner fatigue damage model is safer.

References:

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Memo

Memo:

Biographies: Xue Yanqing(1985—), male, graduate; Huang Xiaoming(corresponding author), male, doctor, professor, huangxm@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.51008071), the Natural Science Foundation of Jiangsu Province(No.BK2010413).
Citation: Xue Yanqing, Huang Xiaoming, Qian Shunzhi, et al. Fatigue reliability quantitative analysis of cement concrete for highway pavement under high stress ratio[J].Journal of Southeast University(English Edition), 2012, 28(1):94-99.[doi:10.3969/j.issn.1003-7985.2012.01.016]

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