Mechanics Analysis About Asphalt Paving On Long-Span Steel Bridge

Transverse crack, longitudinal crack and binding course failures often occur with high frequency in asphalt concrete pavement surfacing. Orthotropic decks are different from most types of decks such as concrete or concrete filled steel grating due to their flexibility and the ability to bond to the wearing surface. So the researchers all over the world try to get to know the mechanical property of the surfacing of orthotropic steel bridge deck and the wearing system. In previous correlative research many conclusions are got but there are many problems such as the models are not consistent and some factors are not considered.So this dissertation first discusses the FEM on range of the modle,type of the restriction, type and size of the element,finally get a basal FEM.Secondly, analyze the influence of some factor of the box girder structure without paving to the mechanics characters. And get a series of formula.Thirdly, combine asphalt pave and orthotropic deck as a whole, analyze the most disadvantage position of loadings and the influence of some master factor of the box girder structure with paving. The relations between each mechanical index and the general parameters of steel-box joist deck and surfacing structure are analyzed. The regress formulas proposed between each mechanical index and axle-loads are of good relativity. Finally, based on the statics analysis,this dissertation establishes a dynamic modle and analyze dynamic coefficient.The researches about mechanics analysis and structure design of steel box girder asphalt paving in this dissertation will be of inportance and practical values to the construction and maintenance of long span steel bridge paving in our country.