A cable-stayed steel truss cooperative system bridge

Abstract

The invention relates to a cable-stayed steel truss cooperative system bridge. The cable-stayed steel truss cooperative system bridge comprises a main span and side spans, wherein a middle pier is arranged on the lower part of the main span; the cable-stayed steel truss cooperative system bridge is characterized in that steel truss cantilever beams are arranged at the side spans thereof; cables and a bridge deck are arranged at the inner ends of the steel truss cantilever beams and on the middle part of the main span. Compared with the prior art, the cable-stayed steel truss cooperative systembridge provided by the invention has the advantages as follows: through combination of the conventional steel truss girder bridge and the conventional cable-stayed bridge, the main span bridge deck supported by stay cables can be arranged under the condition that a towering bridge tower is not required to be arranged, the dynamic performance better than that of the conventional cable-stayed bridge under the same condition can be achieved, and the wind-resisting stability thereof is improved; the cable-stayed steel truss cooperative system bridge is especially suitable for a long-span bridge with an aviation height limit requirement.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to a cable-stayed steel truss cooperative system bridge. Background technique [0002] There are many bridge structures suitable for spans of 300-500m, including almost all bridges including steel truss girder bridges, cable-stayed bridges, suspension bridges and arch bridges. However, each bridge type has its own natural conditions for bridge construction , such as thrust arch bridges and ground anchor suspension bridges are not suitable for the geological conditions of soft soil foundations. When there are strict height limit requirements, conventional cable-stayed bridges, arch bridges and even suspension bridges will exceed the height limit requirements because of the bridge towers and arch ribs. Not suitable anymore. [0003] Relatively speaking, the steel truss girder structure is low in height and can be used for large and medium-span bridges with limited height requirements...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional truss bridge has dense members and unsatisfactory visual effects, mainly in the following aspects:

[0005] (1) There are many rods and the vision is messy;

[0006] (2) Under the stable control of the rod, the bearing force is small;

[0007] (3) The construction of the main span on the river is difficult;

[0008] (4) The cost is high and the economy is poor

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