JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2011, Vol. 41 ›› Issue (5): 121-126.

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Research on control system and test of full-scale highway accelerated loading testing

GUAN Zhi-guang1,2, LIN Ming-xing1*, WANG Xu-guang2, ZHANG Ji-wei2   

  1. 1. School of Mechanical Engineering, Shandong University, Jinan 250061, China;
    2. Department of Mechanical Engineering, Shandong Jiaotong University, Jinan 250023, China
  • Received:2010-10-25 Online:2011-10-16 Published:2010-10-25

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Abstract:

The facility of the full-scale highway accelerated loading testing(ALT) was developed, which has self-owned intellectual property. The control system was studied and designed for the full-scale ALT facility, and  the pavement experiment was analyzed. The ALT control system adopted CAN bus, which can improve reliability. The circulating-type and single direction loading can be realized by vectorcontrol of the inverter. The tested pavement can produce rutting and mild fatigue in a compressed time period, which can help analysis the failure mechanism of the life cycle and can also offer reference for the road design, construction and acceptance. The relationship of dynamic pavement response with load, speed and tire pressure was  researched using the facility. The results showed that there was not only tensile strain but also compressive strain at the bottom of the asphalt layer; furthermore, the variation of tensile strain was bigger than compressive strain, while the change trend reduced with the speed increasing.

Key words: full-scale, highway accelerated loading testing(ALT), CAN bus, load, strai

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