Main girder structure system of double-layer bridge deck cable-stayed bridge

A cable-stayed bridge and main girder technology, applied in bridges, bridge forms, truss bridges, etc., can solve the problems of high steel consumption of superimposed truss girder, increased scale of main bridge, and low self-weight concentration.

Inactive Publication Date: 2015-04-08
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Abstract
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Problems solved by technology

When the laminated truss girder scheme is adopted, although the concrete bridge deck is added, its self-weight concentration is still small, and the length of the side spans is still required t

Method used

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  • Main girder structure system of double-layer bridge deck cable-stayed bridge
  • Main girder structure system of double-layer bridge deck cable-stayed bridge
  • Main girder structure system of double-layer bridge deck cable-stayed bridge

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Embodiment Construction

[0010] Attached below Figure 1~3 And embodiment the present invention is described further.

[0011] A bridge is a double-deck road cable-stayed bridge with a main span of 708 meters. The main girder adopts a plate-truss combined steel truss girder with a side span of 4×63 meters. The main girder adopts a composite truss structure system. (see attached Figure 1~3 ).

[0012] The mid-span main girder is composed of steel trusses and orthotropic steel deck systems. The chords of the steel trusses are completely welded to the steel bridge deck; the side-span main girders are composed of concrete-coated steel chords, steel webs, prestressed concrete beams, Concrete deck composition (see attached image 3 ).

[0013] as attached figure 2 As shown, the mid-span main girder of the double-deck road cable-stayed bridge includes an upper orthotropic steel deck system 1, a lower orthotropic steel deck system 2, a steel truss web member 3 and a steel truss diagonal member 4 , the...

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Abstract

The invention discloses a main girder structure system of a double-layer bridge deck cable-stayed bridge. The structure system comprises a mid-span main girder and a side-span main girder, and is characterized in that the mid-span main girder adopts the combination of a plate truss and a steel truss girder, and the side-span main girder adopts a structure system of a composite truss girder. The structure system can effectively shorten the side-span span to prevent the side-span weight, keeps the appearance consistency of the whole bridge main girder, and has higher promotion values on such aspects as economy, bridge landscape and driving comfort.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a main girder structure system of a double-deck cable-stayed bridge. Background technique [0002] Long-span double-deck cable-stayed bridges usually use steel truss girders. When the main span uses steel truss girders as stiffeners, the general side spans can be in the form of steel truss girders, single-layer concrete box girders, and laminated truss girders. . [0003] When steel truss girders are also used for the side spans, it is necessary to increase the span of the side spans and set the ballast to balance the large self-weight of the mid-span. The steel truss girders use a large amount of steel and are expensive. When the laminated truss girder scheme is adopted, although the concrete bridge deck is added, its self-weight concentration is still small, and the length of the side spans is still required to balance the self-weight of the mid-span, and the steel ...

Claims

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Application Information

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IPC IPC(8): E01D12/00
CPCE01D12/00E01D6/00
Inventor 马骉邓青儿蒋彦征李鹏常付平
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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