|
|
|
| Field Measurement and Analysis of the Mechanical Response of Asphalt Pavement with Flexible Base Layer in Service |
| LIU Li-yuan1,2, CHENG Huai-lei1, ZHANG Xiao3, ZHAO Dui-jia4, XU Li-fei2 |
1. Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, China;
2. Shanxi Yellow River Frontier Materials Research Institute Co., Ltd., Taiyuan Shanxi 030000, China;
3. College of Civil Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China;
4. Key Laboratory of Highway Construction and Maintenance Technology of Ministry of Transport in Loess Region, Taiyuan Shanxi 030006, China |
|
|
|
|
Abstract The mechanical response of asphalt layer of asphalt pavement is an essential parameter for pavement design. An accurate characterization of the mechanical response of the in-situ asphalt layer is of great significance to improve the reliability of pavement design. The strain data of the service flexible asphalt pavement were collected by field vehicular loading tests. The characteristics of strain waveforms and the strain values under various loading conditions including different axle loads, vehicular speeds and temperatures were investigated by the statistical approach. The results show that the strain waveforms at the bottom of the asphalt layer are significantly influenced by the loading position of the tire. The axle load, temperature and vehicular speed all have significant effects on the strains at the bottom of asphalt layer, but do not significantly change the strain waveform shapes. The increase in the axle load/temperature or the decrease in the vehicular speed all leads to an overall increase in the peak-to-peak strains values of transverse and longitudinal strain pulses. Compared with the waveforms at the bottom of the asphalt layer, the strain response waveforms at the bottom of the ATB layer show significantly viscous behaviors. The interaction of two factors, axle load and temperature, on the mechanical response of the pavement is obvious. The effect of axle load on the extreme values of horizontal-vertical strains at different temperatures was shown to be significantly different. The interaction between vehicle speed, axle load and temperature was not significant. In addition, the model for describing the relationships among strains, vehicular speed, axle load and temperature are established, to predict the strain values under various loading conditions. The research findings are helpful to evaluate the real stress state of flexible pavement asphalt layer, and provide reference data for the design of flexible pavement in China.
|
|
Received: 07 April 2022
|
| Fund:Supported by the National key R & D Program (No. 2018yfb1600100), the National Natural Science Foundation of China (No. 5210081231), the Postdoctoral Science Foundation of China (No. bx2021216, 2021m702479) |
|
|
|
[1] CHATTI K, KIM H B, YUN K K, et al. Field Investigation into Effects of Vehicle Speed and Tire Pressure on Asphalt Concrete Pavement Strains[J]. Transportation Research Record Journal of the Transportation Research Board, 1996, 1539(1):66-71.
[2] AL-QADI I L, LOULIZI A, ELSEIFI M, et al. The Virginia Smart Road:The Impact of Pavement Instrumentation on Understanding Pavement Performance[J]. Journal of the Association of Asphalt Paving Technologists, 2004(73):427-465.
[3] APPEA A K. Validation of FWD Testing Results at the Virginia Smart Road:Theoretically and by Instrument Responses[D]. Blacksburg:Virginia Polytechnic and State University, 2003.
[4] TIMM D H, PRIEST A L, MCEWEN T V. Design and Instrumentation of the Structural Pavement Experiment at the NCAT Test Track, NCAT Report 04-01[R]. Auburn:National Center for Asphalt Technology, 2004.
[5] TIMM D H, PRIEST A L. Dynamic Pavement Response Data Collection and Processing at the NCAT Test Track, NCAT Report 04-03[R]. Auburn:National Center for Asphalt Technology, 2004.
[6] BAYAT A, KNIGHT M. Investigation of Hot-mix Asphalt Dynamic Modulus by Means of Field-measured Pavement Response[J]. Transportation Research Record:Journal of the Transportation Research Board, 2010, 2154(1):138-145.
[7] AL-QADI I L, XIE W, ELSEIFI MA. Frequency Determination from Vehicular Loading Time Pulse to Predict Appropriate Complex Modulus in MEPDG[J]. Journal of the Association of Asphalt Paving Technologists, 2008, 77:739-771.
[8] LOULIZI A, Al-QADI I L, LAHOUAR S, et al. Measurement of Vertical Compressive Stress Pulse in Flexible Pavements:Representation for Dynamic Loading Tests[J]. Transportation Research Record:Journal of the Transportation Research Board, 2002, 1816(1):125-136.
[9] LOULIZI A, FLINTSCH G W, AL-QADI I L, et al. Comparing Resilient Modulus and Dynamic Modulus of HOT-mix Asphalt as Material Properties for Flexible Pavement Design[J]. Transportation Research Record:Journal of the Transportation Research Board, 2006, 1970(1):161-170.
[10] ZHA Xu-dong, ZHANG qi-sen. Laboratory Study on the Asphalt Pavement Structure[J]. China Civil Engineering Journal, 2000, 33(5):92-96. (in Chinese)
[11] CHEN Feng-chen, TAN Yi-qiu, DONG Ze-jiao, et al. Research on Strain Filed of Asphalt Pavement Based on FBG Sensor Technique[J]. Journal of Highway and Transportation Research and Development, 2008, 25(10):9-12. (in Chinese)
[12] DONG Ze-jiao, LIU Hao, TAN Yi-qiu, et al. Field Measurement of Three-direction Strain Response of Asphalt Pavement[J]. Journal of South China University of Technology:Natural Science Edition, 2009, 37(7):46-51. (in Chinese)
[13] YANG Yong-shun, WANG Lin, GAO Xue-chi, et al. Introduction of Perpetual Pavement Test Road in Shandong[C]//China Highway and Transportation Society, Proceedings of National Symposium on Typical Pavement Structure Technology of Expressway. Jinan:China Highway and Transportation Society, 2019:1-8. (in Chinese)
[14] YANG Yong-shun, WANG Lin, WEI Jin-cheng, et al. Typical Pavement Structure Dynamic Response Data Collection and Analysis under Heavy Vehicle Loading[J]. Journal of Highway and Transportation Research and Development, 2010, 27(5):11-16. (in Chinese)
[15] Research Institute of Highway Ministry of Transport. Full-scale Test Track of Pavement Report in 2016[R]. Beijing:Research Institute of Highway Ministry of Transport, 2016. (in Chinese)
[16] CHENG H L, LIU L P, SUN L J, et al. Comparative Analysis of Strain-pulse-based Loading Frequencies for Three Types of Asphalt Pavements via Field Tests with Moving Truck Axle Loading[J]. Construction and Building Materials, 2020, 247:118519.
[17] CHENG Huai-lei, LI Bin, LIU Li-Ping, et al. Evaluation of Master Curve of Response-based Modulus for Asphalt Pavement Layer Under Vehicular Load[J]. China Journal of Highway and Transport, 2020, 33(10):125-134. (in Chinese)
[18] CHENG Huai-lei, LIU Li-ping, SUN Li-jun. Field Measurements of Dynamic Strain Responses of Asphalt Pavement on Steel Deck Bridge[J]. China Civil Engineering Journal, 2019, 52(6):100-109. (in Chinese)
[19] DONG Zhong-hong, XU Quan-liang, LU Peng-min. Dynamic Response of Semi-rigid Base Asphalt Pavement Based on Accelerated Pavement Test[J]. China Journal of Highway and Transport, 2011, 24(2):1-5, 11. (in Chinese)
[20] CHENG Huai-lei, LIU Li-ping, SUN Li-jun. A Case Study on Evaluating In-situ Layer Modulus of Asphalt Pavement[J]. China Civil Engineering Journal, 2020, 53(2):119-128. (in Chinese) |
|
|
|
2022, Vol. 16 
