Research On Several Mechanical Problems Of Asphalt Pavement Structure

With the development of traffic work, the road-structures, for example bridge, are more and more, at the same time, the destruction in deck is very heavy, and many bridge decks are damaged soon after the bridges are used, such as crack, rutting, abscission etc. On this background, people have had research on those diseases largely. But in comparison with steel-bridge deck, the research on deck on concrete-bridge is very small, especially asphalt-concrete deck structure on longitudinal-slope-bridge. On the basis of this, I carry out the theoretical research on the deck on longitudinal-slope-bridge.Firstly, I analyze some common diseases on deck on concrete-bridge, and think that shear failure is one of the main failures on deck on concrete-bridge. Secondly, according to the character of shear failure on deck structure on longitudinal-slope-concrete-bridge, I mainly analyze shear' changing rule on deck structure on longitudinal-slope-concrete-bridge, including that how the shear in deck changes by modulus, Poisson' ratio of the damp-proof course, how the shear in deck structure on longitudinal-slope-concrete-bridge changes by thickness of the asphalt-concrete-surface, how the shear in deck changes by the longitudinal grade. In the last, through the analysis on failures on deck before, I give design indexes and have simple research on the design theories of deck. The main findings are the shear in deck structure on longitudinal-slope-bridge can be reduced by increasing thickness of asphalt-concrete-surface, the shear in deck is affected little by the longitudinal grade.