阅读说明：本技术 一种波形钢腹板带预应力的组合梁 (Prestressed composite beam of corrugated steel web plate ) 是由 万水 黄牧允 张钰伯 谷志勇 边建民 景茂武 胡晓芬 李晓辉 于 2020-04-29 设计创作，主要内容包括：本发明公开了一种波形钢腹板带预应力的组合梁,涉及桥梁施工技术领域,所述组合梁包括混凝土顶板、混凝土底板、混凝土锚固区、钢梁、预应力筋及预应力筋锚固装置,所述钢梁包括上翼缘平钢板、下翼缘平钢板、顶板连接件、底板连接件及波形钢腹板。本发明的钢梁采用工厂预制,混凝土顶板、混凝土底板及混凝土锚固区采用施工现场浇筑,预应力筋在混凝土浇筑养护完成后采用后张法施加预应力,利用波形钢腹板的褶皱效应以及预应力筋的高强度特点,直接将预应力筋的初拉力传递至混凝土板内,进一步提高了预应力的利用效率,并具有缩短施工周期,提高施工效率的优点。(The invention discloses a prestressed composite beam with a corrugated steel web plate, and relates to the technical field of bridge construction. The steel beam is prefabricated in a factory, the concrete top plate, the concrete bottom plate and the concrete anchoring area are cast in situ, the prestressed tendon applies prestress by adopting a post-tensioning method after the concrete is cast and cured, and the initial tension of the prestressed tendon is directly transmitted into the concrete slab by utilizing the wrinkle effect of the corrugated steel web and the high strength characteristic of the prestressed tendon, so that the utilization efficiency of the prestress is further improved, and the construction method has the advantages of shortening the construction period and improving the construction efficiency.)

1. The utility model provides a combination beam of wave form steel web area prestressing force which characterized in that, combination beam includes concrete roof (7), concrete bottom plate (8), equally divide concrete anchor district (9) that do not are equipped with between concrete bottom plate (8) angle tip and concrete roof (7), the girder steel that is equipped with between concrete roof (7) and concrete bottom plate (8), pass prestressing tendons (6) that the girder steel set up and the prestressing tendons anchor (10) that are equipped with on concrete anchor district (9) the lateral wall.

2. The corrugated steel web prestressed composite girder of claim 1, wherein: the steel beam comprises an upper flange flat steel plate (2), a lower flange flat steel plate (4), a top plate connecting piece (1) arranged at the upper end of the upper flange flat steel plate (2), a bottom plate connecting piece (5) arranged at the lower end of the lower flange flat steel plate (4), and a corrugated steel web plate (3) with holes, which is symmetrically distributed between the upper flange flat steel plate (2) and the lower flange flat steel plate (4).

3. The corrugated steel web prestressed composite girder of claim 2, wherein: the trompil of wave form steel web (3) all is located its cross section's central line, prestressing tendons (6) pass through trompil on the wave form steel web (3) passes wave form steel web (3) setting.

4. The corrugated steel web prestressed composite girder of claim 3, wherein: the prestressed tendons (6) penetrate through the openings in the corrugated steel web (3) along the longitudinal direction of the composite beam according to a fold line shape and a straight line shape.

5. The corrugated steel web prestressed composite girder of claim 3, wherein: the prestressed tendons (6) are stranded wires woven by carbon fiber reinforced composite materials.

6. The corrugated steel web prestressed composite girder of claim 3, wherein: the prestressed tendons (6) are high-strength steel strands.

7. A composite beam prestressed by corrugated steel web plate as claimed in claim 5 or 6, characterized in that: the prestressed tendons (6) are externally provided with protective coatings.

8. A composite beam prestressed by corrugated steel web plate as claimed in claim 5 or 6, characterized in that: and the outer part of the prestressed tendon (6) is provided with a protective sleeve.

9. The corrugated steel web prestressed composite girder of claim 1, wherein: and common steel bars and internal prestressed steel bundles are arranged in the concrete top plate (7) and the concrete bottom plate (8).

Technical Field

The invention relates to the technical field of bridge construction, in particular to a prestressed composite beam with a corrugated steel web plate.

Background

As a novel composite structure, the corrugated steel web composite beam is compared with the traditional concrete beam and a flat steel web composite beam, and the corrugated steel plate is sheared, so that the concrete top plate and the concrete bottom plate are bent, and the corrugated steel web composite beam is a reasonable and effective structural form. And due to the folding effect of the corrugated steel web, the deformation of the corrugated steel plate along the longitudinal bridge direction can reduce the loss under the action of prestress, and the utilization rate of the prestress is improved.

The external prestressing system is widely used in corrugated steel web composite beams and is one of the important methods for applying prestressing force. However, the external prestress is transmitted to the concrete only by a special device and an anchoring device, the deformation is inconsistent, the prestress loss is easily caused, and the steering block needs to meet the requirements of sufficient size and strength due to bearing larger longitudinal and transverse forces, so that the steering block is heavy, is inconvenient in the concrete on-site pouring process, and influences the construction efficiency.

Therefore, a new solution is now needed.

Disclosure of Invention

In order to solve the problems, the invention discloses a corrugated steel web plate prestressed composite beam, which improves the problems of an external prestressed system of the conventional corrugated steel web plate composite beam, improves the consistency of a main beam body and the prestress, further improves the utilization efficiency of the prestress, eliminates a steering block during concrete pouring, shortens the construction period and improves the construction efficiency.

In order to achieve the above purpose, the invention provides the following technical scheme: the utility model provides a combination beam of wave form steel web area prestressing force which characterized in that, combination beam includes concrete roof, concrete bottom plate, equally divide the concrete anchor district that is equipped with respectively between concrete bottom plate angle end and the concrete roof, the girder steel that is equipped with between concrete roof and the concrete bottom plate, pass the prestressing tendons that the girder steel set up and the prestressing tendons anchor that is equipped with on the concrete anchor district lateral wall.

As an improvement of the invention, the steel beam comprises an upper flange flat steel plate, a lower flange flat steel plate, a top plate connecting piece arranged at the upper end of the upper flange flat steel plate, a bottom plate connecting piece arranged at the lower end of the lower flange flat steel plate and a corrugated steel web plate with openings, wherein the corrugated steel web plate is symmetrically distributed between the upper flange flat steel plate and the lower flange flat steel plate.

As an improvement of the invention, the openings of the corrugated steel web plate are all located on the central line of the cross section of the corrugated steel web plate, and the prestressed tendons are arranged through the corrugated steel web plate through the openings of the corrugated steel web plate.

As an improvement of the invention, the prestressed tendons penetrate through the openings in the corrugated steel web plates along the longitudinal direction of the composite beam according to a fold line shape and a straight line shape.

As an improvement of the invention, the prestressed tendons are stranded wires woven by carbon fiber reinforced composite materials.

As an improvement of the invention, the prestressed tendons are high-strength steel strands.

As a modification of the invention, the tendon has a protective coating on the outside.

As a modification of the invention, the prestressed tendon is externally provided with a protective sleeve.

As an improvement of the invention, common steel bars and in-vivo prestressed steel bundles are arranged in the concrete top plate and the concrete bottom plate.

Compared with the prior art, the invention has the following advantages: through the prestressing tendons that passes the wave form steel web, improve the uniformity of girder body and prestressing force, utilize the fold effect of wave form steel web, directly apply prestressing force and use concrete top, bottom plate, and then improve prestressing force's utilization efficiency, the turning block when removing concrete placement from shortens construction cycle, improves the efficiency of construction.

Drawings

FIG. 1 is a schematic view of the overall structure of a prestressed composite beam of a corrugated steel web plate according to the present invention;

FIG. 2 is a schematic view of the steel beam structure;

FIG. 3 is a front view of the steel beam;

FIG. 4 is a side view of the steel beam;

FIG. 5 is a longitudinal sectional view of the prestressed tendons at the outermost side of the composite beam prestressed by the corrugated steel web plate of the present invention;

list of reference numerals: 1. a top plate connection; 2. an upper flange flat steel plate; 3. a corrugated steel web; 4. a lower flange flat steel plate; 5. a base plate connector; 6. prestressed tendons; 7. a concrete top plate; 8. a concrete floor; 9. a concrete anchoring zone; 10. prestressing tendons anchor.

Detailed Description

The present invention is described in further detail below with reference to figures 1-5.

Referring to the attached drawings 2, 3 and 4, the prefabrication of steel beams in the corrugated steel web prestressed composite beam is carried out in a factory, and the corrugated steel web prestressed composite beam comprises an upper flange flat steel plate 2, a top plate connecting piece 1, a lower flange flat steel plate 4, a bottom plate connecting piece 5 and a perforated corrugated steel web 3.

Referring to the attached drawings 2, 3, 4 and 5, for each steel beam, two corrugated steel webs 3 are symmetrically distributed between the steel beam upper flange flat steel plate 2 and the steel beam lower flange flat steel plate 4, and the openings of the corrugated steel webs 3 are located on the central line of the cross section of the corrugated steel webs 3.

Referring to the attached drawings 2, 3, 4 and 5, each prestressed tendon 6 longitudinally penetrates through the reserved opening of the corresponding corrugated steel web according to a fold line shape and a straight line shape along the composite beam, and a certain length is reserved at two ends of each prestressed tendon for tensioning and anchoring in the concrete anchoring area 9. The prestressed tendons 6 are stranded wires or high-strength steel stranded wires woven by carbon fiber reinforced composite materials and provided with protective coatings or protective sleeves.

And (3) conveying the prefabricated steel beam to a construction site, erecting a construction mold, binding reinforcing steel bars, and completing pouring and later-period maintenance of the concrete top plate 7, the concrete bottom plate 8 and the concrete anchoring area 9. After the concrete is cured to the required strength, the prestressed tendons 6 are stretched and anchored by the prestressed tendon anchoring device 10.

The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.