A curved cable-stayed bridge with multiple inclined main pylons

Abstract

The invention discloses a curved cable-stayed bridge with multiple inclined main pylons, which includes the main girder, bridge towers and stay cables, the main girder adopts arc-shaped arrangement, and the bridge tower is inclined toward the outside of the main beam, The angle of inclination of the pylon is determined by the angle between the pylon and the main girder in the radial direction andthe vertical direction at the 1 / 3 span of the main span, The main girder includes arc girder, straight girder and transition curve girder. The transition curve girder adopts the structure of concretebridge deck combined with steel truss girder. By adjusting the thickness of concrete bridge deck, it can adapt to the variable slope requirements of transition curve girder. According to the invention, the radius R of the arcuate beam can be specified, Between that straight beam and the curve beam, the transition between the transition curve beam is adopt, To meet the requirements of the railway code, the bridge tower is inclined to resist the radial force produced by the constant and live load of the structure, and the tower gravity is used to counteract the radial force, so as to improve thestructural stress of the tower, so that a long-span bridge scheme can be provided on some lines with complex curves to meet the needs of the project.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a curved cable-stayed bridge with multiple inclined main towers. Background technique [0002] At present, the length of highway and railway bridge construction projects is generally more than several kilometers, or even tens of kilometers, especially for cross-river and sea-crossing bridges. Due to the demand for beam section wiring, it is impossible for such a long line to be on a straight line. Therefore, Curved girder bridges need to be built to meet the route requirements, and more navigable locations are also on curved sections. Curved girder bridges are sometimes unable to meet the navigation requirements due to the limited span. However, most traditional curved cable-stayed bridges have two towers, and the towers are vertical. It is difficult to meet the curved line with a small radius of curvature, and the span is also limited. [0003] In view of this, there...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing curved cable-stayed bridges are difficult to meet the requirements of curved lines with small curve radius, and at the same time, there is the problem of limited span

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