| Citation: | CHEN Yang, TONG Zhaoxia, FENG Jinyan, et al. Dynamic analysis on cement concrete pavement with initial cracks under impact loading[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(7): 1474-1480. doi: 10.13700/j.bh.1001-5965.2018.0639(in Chinese)
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The effects of impact loading on the failure of cement concrete pavement are significantly different from those of traffic loading. This paper investigates the characterization of cement concrete pavement with varied initial crack length and location under impact loading. It is found that the final crack length and settlement generated in the pavement increase with the increase of the initial crack length and decrease with the increase of the distance between the initial crack and the loading center. The penetrating crack is produced when the the ratio of the initial crack length of the pavement to the surface layer thickness exceeds one certain value. The deformation of limestone and loess layer below the surface layer and in the range of about 5 times thickness of cement concrete layer is affected greatly by the initial crack length. The initial crack length and location play a significant role on the settlement of cement concrete pavement within 1 m distance from the loading center.
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