Box Girder And Thin Walled Pier Spatial Analyse Of The Long Span Cured Bridge With High Pier

Based on the western communication construction scientific and technical item, "The design and construction technology study on the long span curved bridge with high pier", according to Shayinggou Bridge in Guizhou, using finite element method ,the box girder and thin walled pier of the long span cured bridge are Spatial analysed in this paper . Internal force and displacement changing of box girder with different radius are analysed, especially torsion rule of the curved bridge. The transversal stress of curved box girder in different condition is discussed. The force rule of thin walled pier is gain, by comparing the force character of the hige thin walled pier.The result show that torque of curved bridge is produced by dead load, and that is aggravated along with the reducing of radius, to the contrary, the longitudinal bending moment and shear are not changed. The displacement of box girder two sides is different due to the torque, and that is bigger of smaller radius. The transversal stress is influented by side span radio and temperature and that can be controlled by prestress. There is transversal displacement of pier along the height because of the dead weight of box girder and torque, and that is increased by small radius. The force of pier is influenced by prestress, pier height and radius. The force of low pier is huge, so that low pier is avoided, or measure is adopted. The transversal bending moment is producted by box girder weight, and that become greater when the radius is smaller.The results of the paper gives some advises and reference to the design and construction of the similar long span curved continuous rigid frame bridge with high pier.