Abstract:

The cement concrete pavement slab structure model is poured by a certain scale, and the joint is provided with dowels and have different loosening lengths. Using different loading levels to determinate relevant data, load transfer coefficient and mechanical characteristics between dowel and pavement concrete under different loose lengths are studied. Results show that when load is small, the joint load transfer coefficient does not change significantly; When it reaches 1~3 kN, load transfer coefficient increases significantly; When it is bigger than 5 kN,load transfer coefficient is relatively stable. When dowel loose gap length reachs 0~10 cm, concrete strain joints,load transfer coefficient rod and concrete interface gradually decrease as the loose length increases, shear strain of dowelincreasesfirstlyandthendecreases.Sincetheloosegapiswiderthan10cm,anyindexhasnoobviouschange.

Key words: joints, loose dowel, load transfer coefficient, load rating