The Tension Fracture Simulation on the Asphalt Pavement with the Insufficient Compaction Roadbed

Abstract:

For the study of soft subgrade pavement cracking process, it establishes the pavement structure tension crack model by elastic layered theory. Based on the finite element method, it studies the tension crack evolution process. It establishes the tension crack stress criterion to the roadbed. Analysis shows that the distresses of asphalt pavement of the real highway results from the damage by asymmetric sedimentation which is under excessively axle loading on pavement structure, rather than the fatigue damage by axle loading repetitions in the condition of asymmetric intensity in the same layer. The results show that the soft degree of the subgrade is proportional to the tensile stress, the more localized soft, the easier to crack the road. The soft roadbed does not have a homogeneous structure of the road surface, the tension stress rupture occurred in the discontinuous surface. The road structure has a set of tensile stress under the circulation wheel load, it formats a new fracture surface, and the structure form corresponding evolves, and causes stress state change. At last most of the road sub-base crack, and surface cracking occurres, so the pavement failure.

• Periodical: Advanced Materials Research (Volumes 243-249)
• Pages: 3868-3872
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.243-249.3868
• Online since: May 2011
• Authors: Lai Gui Wang, Mei Sheng Feng, Hong Zhu Zhang
• Keywords: Extension Rupture, Finite Element Model (FEM), Road Structure, Structural Evolution

References

[1] Duncan J M, Monismith C L, Wilson, E L. Highway Research Record. Vol. 22(1968), p.18.

[2] Monismith C. L., Inkabi K., McLean, D. B. Freeme C. R. Scientific and Technical Information. Vol. 33(1977), p.64.

[3] BROWN S., FPappin J. W. Transportation Research Record. Vol. 22(1981), p.17.

[4] Zaghloul S. White T. Transportation Research Record. Vol. 21(1993), p.60. In Chinese.

[5] LIU Cai-ping, JU Yang, DUAN Qing-quan. Rock and Soil Mechanics. Vol. S(2010), p.1245. In Chinese.

[6] WANG Xin-min , ZHAO Bin, ZHANG Qin-li. China Mining Magazine. Vol. 16(2007), p.65. In Chinese.

[7] WANG Lai-gui1, ZHAO Na, ZHOU Yong-fa, YANG Xiao-jun. Journal of Liaoning Technical University. Vol. 26(2007), p.198. In Chinese.

[8] WANG Laigui, ZHAO Na, CHU Ying, ZHOU Yongfa. Journal of Shenyang Architecture University: Science edition. Vol. 27(2008), p.44. In Chinese.