Partial cable-stayed bridge with fish-back structure

Abstract

The invention discloses a partial cable-stayed bridge of a fish bone beam structure. The partial cable-stayed bridge of the fish bone beam structure comprises a main beam, a plurality of bridge towers and stayed cables, wherein anchoring ends or saddle areas of the bridge towers are arranged on the main beam, the stayed cables are arranged between the main beams and the bridge towers, part of stayed cables further comprise multiple vertical walls corresponding to the bridge towers one to one, the vertical walls are fish bone walls, the main beam is an equal-altitude box type bridge panel, columns of the bridge towers are embedded in the corresponding fish bone walls, and the tops of the columns of the bridge towers extend out of the fish bone walls. One end of each stayed cable is tensioned and anchored on the main beam, and the other ends of the stayed cables are anchored at the tops of the bridge towers or continuously pass through the saddle areas. The partial cable-stayed bridge of the fish bone beam structure has all the advantages of a traditional cable-stayed bridge. The structural rigidity of a bridge body is high, the stress of the bridge towers is more reasonable, the fish bone walls have the function of the bridge towers, the section is larger, and the bending performance is better.

Description

technical field [0001] The invention relates to a cable-stayed bridge, in particular to a partial cable-stayed bridge with a fish spine structure. Background technique [0002] The partial cable-stayed bridge is a transitional bridge between the cable-stayed bridge with very flexible stiffened girders and the girder bridge with very high girder height. The tower is shorter. This bridge type has the dual characteristics of cable-stayed bridge and girder bridge, so it is called "partial cable-stayed bridge". It is related to the ratio of the stiffness of the stay cables to the stiffness of the stiffening beam. [0003] Generally speaking, the continuous beam bears the vertical load by bending and shearing, the cable-stayed bridge bears the vertical load by the compression of the beam and the tension of the cable, and some cable-stayed bridges adopt the form of cables, Such as figure 1 As shown, in a part of the cable-stayed bridge, the external prestressed tendons are move...

AI Technical Summary

Problems solved by technology

[0005] The girder height for controlling building height is higher than that of regular cable-stayed bridges with flexible stiffening girders, and the overall layout of bridges with limited requirements for building girder height (such as navigation requirements, wiring requirements, and bridge length requirements), for example, if the span needs to be increased , the girder height of the bridge must be increased first, which will inevitably increase the length of the approach bridge and the corresponding project cost, etc., and is unfavorable for the connection with the horizontal planning road project

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