The Bending Effect Of Prestressed Continuous Box Curved Bridge

The biggest feature of curved bridge comes into being the torsion under constant and torque mutual coupled with bending moments. Currently straight bridge theory and practical experience are quite rich. Relatively, computational theory of curved bridge is not perfect, the number of construction and experience worse than straight bridge. We need a clear guide to help establish direct contact between the straight bridge and curved bridge. In view of this goal, in the weight loads, under certain span ratio conditions, characteristics of internal forces bent bridge at different radii of curvature and different span. Torque and bending moment generated by the bridge is not a negligible small amount, is a relatively large value to determine the structural safety. With curved bridge torque and bending moment control objectives, research asymmetric configuration of prestressing steel curved bridge torque adjustment, and made adjustments to the asymmetric combination with prestressed reinforcement. Curved bridge cross-section cross slope for drainage, the need to consider the ultra-high value curve, cross slope set value is usually larger than the straight bridge. Straight bridge cross slope set a small, not very large internal force generated by the cross slope gradient, and in curved bridge will produce large internal forces, mainly in the transverse direction of the moment. The effects of cross slope gradient of curved bridge section force, combined with asymmetric reinforcement approach proposed adjustments sectional cross slope. Measured data and theoretical data were compared, proposals for changes. Finally, analysis of internal forces of the curved bridge, when the seat moved. Contrast solid model and truss model, indicating their similarities and differences. Effect of curved bridge lateral effect at different radii of curvature, discuss with the solid model.