Road-rail co-layer mixed-beam suspension cable-stayed cooperation bridge

Abstract

The invention relates to a road-rail co-layer mixed-beam suspension cable-stayed cooperation bridge. The bridge comprises a main beam and at least two bridge towers, wherein the two bridge towers aresequentially arranged along the bridge direction, a road bridge deck and an rail bridge deck are arranged on the main beam in the same layer, the two adjacent bridge towers are connected through a main cable, and the main cable is connected with main beam bodies below through a sling; and each bridge tower is connected with main beam bodies on the two sides through an stay cable. According to theroad-rail co-layer mixed-beam suspension cable-stayed cooperation bridge, a suspension structure of the main cable plus the sling and a cable-stay structure of the stay cable are combined, the advantages of a suspension bridge and a cable-stayed bridge are brought into full play, thus effective improving the rigidity of 1 / 4 of the span and span area structure; in addition, the main beam is large in overall rigidity and reasonable in stress, so that the span of a bridge can be improved to 1600 m, the overall rigidity of the structure is large, and accordingly requirements of railway track shapedeformation can be fully met.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a suspension and cable-stayed cooperative bridge with mixed girders on the same floor for highway and railway. Background technique [0002] Most of the bridges built jointly by road and railway adopt layered deck layout. With the continuous development and technological progress of highway and railway construction, bridges arranged on the same layer by road and rail are also applied. These bridges on the same layer of road and rail basically use cable-stayed bridges The structure of the bridge. The advantages of cable-stayed bridges are high overall rigidity, simple structure, convenient construction, and relatively low cost. However, as the span increases, the bridge deck girder bears a huge axial force, and the stability is difficult to control. Large, the height of the bridge tower is high, controlled by the bearing capacity of the concrete material, r...

AI Technical Summary

Problems solved by technology

The advantages of cable-stayed bridges are high overall rigidity, simple structure, convenient construction, and relatively low cost. However, as the span increases, the bridge deck girder bears a huge axial force, and the stability is difficult to control. Large, the height of the bridge tower is high, controlled by the bearing capacity of the concrete material, resulting in a multiple increase in the structural volume, and the creep is also difficult to control; in addition, due to the layout of the highway and railway on the same floor, the width of the bridge deck is greatly increased, and the lateral force is relatively large , to improve the stability of the main beam structure

[0003] The suspension bridge is also a bridge structure widely used at present. The advantages of the suspension bridge are large spanning capacity, low bridge tower, small axial force of the main girder, and good structural stability; but it is a flexible structure with low structural rigidity. Not applicable to bridges with highway and railway on the same floor

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