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Prestressed steel tube concrete combination trussed beam and construction method thereof

A technology of concrete filled steel tube and construction method, applied in bridges, truss bridges, bridge parts, etc., can solve problems such as small deformation, and achieve the effect of reducing deformation and avoiding cracking

Inactive Publication Date: 2013-04-24
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention makes improvements to the defects of the above-mentioned existing steel pipe concrete composite truss girders used in long-span bridges, that is, the technical problem to be solved by the present invention is to provide a prestressed steel pipe concrete composite truss girder with small deformation and its construction method

Method used

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  • Prestressed steel tube concrete combination trussed beam and construction method thereof
  • Prestressed steel tube concrete combination trussed beam and construction method thereof
  • Prestressed steel tube concrete combination trussed beam and construction method thereof

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Embodiment Construction

[0023] like Figure 1~3 As shown, a prestressed steel pipe concrete composite truss comprises a steel pipe truss and a concrete deck 5, the top of the steel pipe truss is connected to the bottom of the concrete bridge deck 5, and the steel pipe truss is composed of two parallel upper chord steel pipes 3. It is composed of a lower chord steel pipe 1 and a plurality of steel web bars 2 symmetrically connecting the upper chord steel pipe 3 and the lower chord steel pipe 1, the lower chord steel pipe 1 is filled with concrete 7, and the lower chord steel pipe 1 is laid with prestressed prestressing Stress tendons4. Among them, by figure 1 It can be seen from the cross-sectional view of the cross bridge that the two steel web members 2 on the same cross-section are symmetrical about the central axis of the lower chord steel pipe 1; figure 2 and image 3 It can be seen from the sectional view along the bridge direction that the plurality of steel web members 2 upward along the b...

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Abstract

The invention relates to a prestressed steel tube concrete combination trussed beam which comprises a steel tube trussed beam and a concrete bridge deck slab, wherein the top part of the steel tube trussed beam is connected with the bottom of the concrete bridge deck slab, the steel tube trussed beam consists of two parallel top chord steel tubes, a bottom chord steel tube and a plurality of steel web members which are abutted to the top chord steel tubes and the bottom chord steel tube, concrete is filled in the bottom chord steel tube, and a prestressed tendon used for adding prestress is paved in the bottom chord steel tube. The invention also relates to a construction method of the prestressed steel tube concrete combination trussed beam. With the adoption of the prestressed steel tube concrete combination trussed beam, by adding the prestress on the steel tube concrete bottom chord steel tube, the whole rigidity of the steel tube concrete combination trussed beam is strengthened in the premise of lightening the structure dead load, deformation of the steel tube concrete combination trussed beam under the structure dead load and the vehicle load is reduced, the welding part of the steel web members and the bottom chord steel tube cracks due to overlarge deformation can also be avoided, and the steel tube concrete combination trussed beam can be applied to a bridge structure with a larger span after the prestress is added on the bottom chord steel tube.

Description

technical field [0001] The invention relates to a prestressed steel pipe concrete composite truss beam and a construction method thereof, belonging to the technical field of civil engineering. Background technique [0002] Steel-concrete composite girder bridges ensure the joint stress of the steel girder and the concrete slab through connectors, which can give full play to the advantages of steel and concrete materials, and have developed rapidly in recent years. The steel pipe composite truss formed by the combination of steel pipe truss and concrete slab is a relatively reasonable composite beam bridge structure. In addition, the required structural bending stiffness can be obtained by adjusting the height of the steel pipe truss without increasing the cost. Steel pipe composite trusses have been widely used in bridge types such as continuous girder bridges, continuous rigid frame bridges, cable-stayed bridges and suspension bridges. [0003] The steel pipe composite tr...

Claims

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Application Information

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IPC IPC(8): E01D6/00E01D19/12E01D21/00E01D101/28E01D101/30
Inventor 韦建刚陈宝春吴庆雄
Owner FUZHOU UNIVERSITY
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