Analysis The Structural Parameters Of High Strength Lightweight Concrete Steel Bridge Deck Pavement

Steel deck pavement is one of the key technologies in the construction of large-span steel girder bridge and has been highly valued and concered by the world of academics and engineers at home and abroad. Study from home and abroad, as well as the construction of the bridge situation. Steel deck pavement layer often has diseases of sliding cracking and swell in the opening of 1² years, which has seriously affected the performance of bridges. In order to provide a theoretic basis for the bridge system design,it is necessary to start from the characteristics of the bridge structure, analysis of steel bridge deck pavement layer and the mechanical properties of the pavement structure of the correspondence between the relevant parameters.In this dissertation, the local stability of orthotropic steel box girder is systematically studied on the basis of researcher achievements and design specifications home and abroad, High strength lightweight concrete steel bridge deck pavement and asphalt concrete pavement structural steel bridge deck structure of a comparative analysis of mechanical properties,by finite element method.And according to a random variable between independent variables and multiple linear regression mathematical model of the mechanical parameters of Pavement indicators linear regression,we get the regression formula for stress of pavement layer structure. The main contents of this dissertation are described as follows:1.the history, the state of the art in bridge engineering and technical problems of orthotropic steel box girder are investigated. Discussed the main form damage of steel deck pavement and the main reasons of causing steel deck pavement damage.2.The new steel bridge deck pavement layer structure was compared with the the asphalt concrete steel bridge deck pavement structure. In the state of horizontal and vertical, the maximum tensile stress of the pavement structure (â… ) than the pavement structure (â…¡) is small 0.4 Mpa, and the pavement structure (â… ) of the bottom shear stress is relatively small.Proved that new steel bridge deck pavement layer structure can effectively solve the diseases of sliding cracking and swell and so on.3.The FEM is used to analyze the mechanical characteristics of steel bridge pavement, from pavement thickness,shear piece diameter,Reinforced network layout and shear pieces layout. The results showed that:the pavement structure with the parameters of thickness of rigid layer below 6cm, thickness of asphalt layer above 2cm, shear case diameter 12mm, spacing of 150mm reinforced net, can significantly reduce the pavement layer and inter-plate shear stress,and pavement surface tensilestress.4. The pavement layer structure of the mechanical parameters is studied, under different loads, were discussed. New equations are calculated, after analyzed the various general parameters of bridge deck pavement:ln(σ_qx)=-1.3811ln(T_q)-0.0097ln(d_q)+0.0062ln(J_q)+0.0064ln(G_q)+17.187ln(σ_qy)=-0.5798ln(T_q)-0.0044ln(d_q)+0.0013ln(J_q)-0.0016ln(G_q)+14.1657ln(Ï„_q)=-0.0427ln(T_q)-0.0077ln(d_q)-0.001ln(J_q)-0.0002ln(G_q) +12.5557 which can be simple and effective to calculate the new steel bridge deckpavement layer stress value.The conclusions of this dissertation can be used straightly on the design ofbridge structures and bridge pavement, and as a base for further analysis.