Conceiving And Application Research Of A New Curve Arch Bridge

The traffic-transportation has been quickly developing since 80th last century in China. The curve bridge which most was curve beam bridge become a main basic construction and was applied far and wide in the highway, but the curve arch bridge is more supero- rity than it in the mountainous areas such as "V" type clough areas.On the basis of the traditional small span curve arch bridge , the text brings out a new long span curve arch bridge, and conceives preliminary design basing on the big bridge of linXiHe forestry centre in the N0105 national highway.Taking ansys8. 0 to have 8 kinds of models base on the preliminary design to analyze the arch -axis coefficient of rib arch from 1.167~2. 814, after comparing to each other, electing that section' stress and moment of the rib arch are closer, well-proportioned and their peak values smaller to do the commendatory arch -axis coefficient m=1.756 .drawing the influence line(plane) when the truck load moves from bridge head to bridge tail, then getting the worst location of the curve arch bridge.then loading the half carriageway-load or full carriageway-load on the worst location and arch crown to get the stress and moment full bridge, especially, the rib arch. Finally checking -computations of internal forces of rib arch were executed bases on the bridge criterion. This text has computed transverse stability of the curve arch bridge with ansys8. 0, obtained the destroy mode of in- plane (out- plane) and the corresponding safety factor.This text brings out that the new long span curve arch bridge with cantalever is feasible, it also can apply in the practical engineering.