CN110904809A - T beam with corrugated steel plate wrapped outside web - Google Patents
T beam with corrugated steel plate wrapped outside web Download PDFInfo
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- CN110904809A CN110904809A CN201910976292.5A CN201910976292A CN110904809A CN 110904809 A CN110904809 A CN 110904809A CN 201910976292 A CN201910976292 A CN 201910976292A CN 110904809 A CN110904809 A CN 110904809A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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Abstract
The invention discloses a T-beam with a web plate wrapped with a corrugated steel plate, and relates to the field of bridge engineering. The invention aims to provide a novel T-shaped beam which can simultaneously solve the problems of bending and shearing cracking of a reinforced concrete T-shaped beam, is convenient to construct and has good stress performance. The technical scheme adopted for achieving the purpose of the invention is that the T-shaped beam with the corrugated steel plate wrapped outside the web plate comprises a steel-concrete combined web plate and a concrete top plate, wherein the steel-concrete combined web plate comprises the corrugated steel plate, a steel bottom plate and a plurality of profile steel shearing resistant pieces. Two the wave form steel sheet forms the steel bay that the cross-section is the U type with the welding of steel bottom plate, and the steel bay interlude has a plurality of prestressing tendons, and the steel bay is inside to pour concrete, and the top edge of two wave form steel sheets is provided with the inside turn-up. The invention solves the problem that the externally-coated flat steel plate is easy to bend under the action of prestress by applying the corrugated steel plate, and the convex-concave structure of the corrugated steel plate can also increase the frictional resistance of the contact surface of the corrugated steel plate and concrete, thereby improving the overall performance of the T-shaped beam.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a T-beam with a web plate wrapped with a corrugated steel plate.
Background
In the field of bridge engineering, prestressed concrete T-beams are widely used due to the advantages of low technical threshold, convenient processing and low cost.
The span, the beam width and the beam height of the main beam used by the bridge structure are larger than those of the main beam used by a common building structure, so that the bending moment and the shearing force caused by the self weight of the main beam used by the bridge are larger, meanwhile, the main beam of the bridge also needs to bear the load of vehicles and people moving on the bridge floor, and the tensile stress of the lower edge of the main beam in the midspan area and the level of the shearing stress near a pivot are higher.
As is known, concrete is a material with excellent compression resistance and poorer tensile property, longitudinal prestress is arranged in a reinforced concrete T beam to form the prestressed concrete T beam, the problem that a tension area in a span of a main beam is easy to crack can be solved through reasonable design, but the problem of shear cracking possibly caused by high shear stress level near a fulcrum cannot be solved.
In order to solve the problems of bending and shearing cracking of the reinforced concrete beam, the prior 'steel plate-coated concrete beam' is proposed. However, for the reinforced concrete beam provided with the longitudinal prestress, the stress shared by the steel plate wrapped outside on the section of the reinforced concrete beam is large due to the large elastic modulus of the steel plate, and the steel plate is easy to bend and break when being pressed, so the reinforced concrete beam wrapped outside cannot be applied to the reinforced concrete beam provided with the longitudinal prestress.
Therefore, it is necessary to invent a new T-beam structure capable of solving the cracking problem of the prestressed concrete T-beam.
Disclosure of Invention
The invention aims to provide a novel T-beam structure which can solve the problem of cracking of a prestressed concrete T-beam, is convenient to construct and has good stress performance.
The technical scheme adopted for achieving the aim of the invention is that the T-shaped beam with the corrugated steel plate wrapped outside the web plate comprises a steel-concrete composite web plate and a concrete top plate, wherein the steel-concrete composite web plate is vertically connected to the lower plate surface of the concrete top plate.
The steel-concrete combined web plate comprises a corrugated steel plate, a steel bottom plate, a steel wing plate, a plurality of profile steel shearing resistant pieces and concrete filled in the steel-concrete combined web plate.
The steel bottom plate is a rectangular steel plate which is horizontally arranged, two corrugated steel plates are vertically welded on the upper surface of the steel bottom plate, and the wavelength directions of the corrugated steel plates are parallel to the horizontal plane.
The two side edges of the steel bottom plate along the length direction are respectively marked as an edge A and an edge B, and the two corrugated steel plates are respectively close to the edge A and the edge B of the steel bottom plate.
And a steel wing plate is vertically welded at the upper edge of each wave-shaped steel plate, and the two steel wing plates form an internal curled edge.
The space enclosed by the corrugated steel plate, the steel base plate and the steel wing plate is marked as a cavity S, and the prestressed reinforcements penetrate through the cavity S along the length direction of the steel base plate. The concrete is filled in the cavity S.
Two the upper surface of steel pterygoid lamina evenly welds has a plurality of shaped steel pieces that shear, and the both ends of every shaped steel piece that shears weld respectively to two steel pterygoid laminas.
Furthermore, the cross section of the section steel shearing resistant part is I-shaped, the section steel shearing resistant part comprises an upper flange, a lower flange and a middle web plate, and the lower flange of the section steel shearing resistant part is welded with the two steel wing plates simultaneously.
Further, the distance between each prestressed steel bar and the steel bottom plate is gradually increased from the midspan position of the steel-concrete composite web plate to the fulcrum position.
Furthermore, a plurality of layers of steel bar meshes are arranged inside the concrete top plate.
The invention has the advantages that the invention solves the problem that the outer flat steel plate is easy to buckle under the action of prestress by utilizing the spring effect when the corrugated steel plate is stressed axially, ensures that most of prestress can be applied to the concrete filled in the steel-concrete composite web plate, and greatly improves the use efficiency of the prestress. Meanwhile, the convex-concave structure of the corrugated steel plate increases the frictional resistance of the contact surface of the corrugated steel plate and the filled concrete inside, so that the overall performance of the T-shaped beam is improved. In addition, the T-beam structure has multiple construction methods, is suitable for various construction environments, and effectively reduces the construction cost.
Drawings
FIG. 1 is a schematic view of a prestressed concrete T-beam with a corrugated steel plate wrapped outside a web;
FIG. 2 is a schematic view of a web-encased steel beam and a prestressed steel beam;
fig. 3 is a partial schematic view of a prestressed concrete T-beam with corrugated steel plates wrapped outside the web.
In the figure: the steel-concrete combined web comprises a steel-concrete combined web 1, a corrugated steel plate 101, a steel bottom plate 102, a steel wing plate 103, a steel section shearing resistant piece 104, prestressed reinforcements 105, a concrete top plate 2 and a reinforcement mesh 201.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and alterations can be made without departing from the technical idea of the invention and the scope of the invention is covered by the present invention according to the common technical knowledge and the conventional means in the field.
Example 1:
the embodiment discloses a T-shaped beam with corrugated steel plates wrapped outside webs, which comprises a steel-concrete combined web 1 and a concrete top plate 2. Referring to fig. 1, a steel-concrete composite web 1 is vertically connected to a lower plate surface of a concrete top plate 2. Referring to fig. 3, a plurality of layers of steel mesh 201 are disposed inside the concrete top plate 2.
Referring to fig. 2, the steel-concrete composite web 1 includes a corrugated steel plate 101, a steel bottom plate 102, a steel wing plate 103, and a plurality of steel shear blocks 104, and concrete filled inside.
The steel base plate 102 is a rectangular steel plate which is horizontally arranged, two corrugated steel plates 101 are vertically welded on the upper surface of the steel base plate 102, and the wavelength directions of the corrugated steel plates 101 are parallel to the horizontal plane.
Two side edges of the steel bottom plate 102 along the length direction are respectively marked as an edge a and an edge B, and the two corrugated steel plates 101 are respectively close to the edge a and the edge B of the steel bottom plate 102.
A steel wing plate 103 is vertically welded to the upper edge of each of the corrugated steel plates 101, and the two steel wing plates 103 form an inward curl.
Referring to fig. 2 or 3, a space surrounded by the corrugated steel plate 101, the steel bottom plate 102 and the steel wing plate 103 is denoted as a cavity S, and a plurality of prestressed reinforcements 105 penetrate through the cavity S along the length direction of the steel bottom plate 102. From the midspan position of the steel-concrete composite web 1 to the fulcrum position, the distance between each prestressed reinforcement 105 and the steel bottom plate 102 gradually increases.
The concrete is filled in the cavity S. The convex-concave structure of the corrugated steel plate 101 increases the frictional resistance of the contact surface of the corrugated steel plate 101 and concrete, thereby improving the overall performance of the T-shaped beam.
Referring to fig. 2, a plurality of section steel shearing resistant members 104 are uniformly welded on the upper surfaces of the two steel wing plates 103, the cross sections of the section steel shearing resistant members 104 are i-shaped, each section steel shearing resistant member 104 comprises an upper flange, a lower flange and a middle web, and the lower flange of each section steel shearing resistant member 104 is welded with the two steel wing plates 103 at the same time. A plurality of the profile steel shear blocks 104 may limit shear slip between the steel-concrete composite web 1 and the concrete roof panel 2 and out-of-plane deformation of the upper edge of the corrugated steel plate 101.
In this embodiment, the following steps are adopted for construction:
1. the method comprises the following steps of (1) welding the corrugated steel plate 101, the steel bottom plate 102, the steel wing plate 103 and the profile steel shearing resistant piece 104 into a steel beam in a factory, hoisting the processed steel beam to a bridge site, and simultaneously using the steel beam as a template system of a bracket and a web plate;
2. erecting a template of the concrete top plate 2 on site, and hoisting the processed reinforcing mesh 201 to the upper part of the template; (ii) a
3. And (3) casting the concrete filled with the concrete and the concrete of the concrete top plate 2 in the steel-concrete combined web plate 1 in situ to form the T-shaped beam structure.
The construction method has low requirement on the hoisting capacity of the crane, can save the time for erecting the support and the web template, and has high construction speed.
Example 2:
the embodiment discloses a T-shaped beam with corrugated steel plates wrapped outside webs, which comprises a steel-concrete combined web 1 and a concrete top plate 2. Referring to fig. 1, the steel-concrete composite web 1 is vertically connected to the lower surface of a concrete top panel 2.
Referring to fig. 2, the steel-concrete composite web 1 includes a corrugated steel plate 101, a steel bottom plate 102, a steel wing plate 103, and a plurality of steel shear blocks 104, and concrete filled inside.
The steel base plate 102 is a rectangular steel plate which is horizontally arranged, two corrugated steel plates 101 are vertically welded on the upper surface of the steel base plate 102, and the wavelength directions of the corrugated steel plates 101 are parallel to the horizontal plane.
Two side edges of the steel bottom plate 102 along the length direction are respectively marked as an edge a and an edge B, and the two corrugated steel plates 101 are respectively close to the edge a and the edge B of the steel bottom plate 102.
A steel wing plate 103 is vertically welded to the upper edge of each of the corrugated steel plates 101, and the two steel wing plates 103 form an inward curl.
Referring to fig. 2 or 3, a space surrounded by the corrugated steel plate 101, the steel bottom plate 102 and the steel wing plate 103 is denoted as a cavity S, and a plurality of prestressed reinforcements 105 penetrate through the cavity S along the length direction of the steel bottom plate 102.
The concrete is filled in the cavity S. The convex-concave structure of the corrugated steel plate 101 increases the frictional resistance of the contact surface of the corrugated steel plate 101 and concrete, thereby improving the overall performance of the T-shaped beam.
Referring to fig. 2, a plurality of section steel shear resistant members 104 are uniformly welded to the upper surfaces of the two steel wing plates 103, and both ends of each section steel shear resistant member 104 are respectively welded to the two steel wing plates 103. A plurality of the steel section shear blocks 104 can resist shear slip between the steel-concrete composite web 1 and the concrete top plate 2.
Example 3:
the main structure of this embodiment is the same as that of embodiment 2, further, the cross section of the section steel shearing resistant member 104 is i-shaped, the section steel shearing resistant member 104 includes an upper flange, a lower flange and a middle web, and the lower flange of the section steel shearing resistant member 104 is welded to the two steel wing plates 103 at the same time.
Example 4:
the main structure of this embodiment is the same as that of embodiment 3, and further, the distance between each prestressed reinforcement 105 and the steel bottom plate 102 gradually increases from the midspan position to the fulcrum position of the steel-concrete composite web 1.
Example 5:
the main structure of this embodiment is the same as that of embodiment 4, and further, referring to fig. 3, a plurality of layers of steel mesh 201 are disposed inside the concrete top plate 2.
Claims (4)
1. The utility model provides a T roof beam of web outsourcing wave form steel sheet which characterized in that: the steel-concrete composite web plate comprises a steel-concrete composite web plate (1) and a concrete top plate (2), wherein the steel-concrete composite web plate (1) is vertically connected to the lower plate surface of the concrete top plate (2);
the steel-concrete combined web plate (1) comprises a corrugated steel plate (101), a steel bottom plate (102), a steel wing plate (103), a plurality of steel shear pieces (104) and concrete filled in the steel-concrete combined web plate;
the steel bottom plate (102) is a horizontally arranged rectangular steel plate, two corrugated steel plates (101) are vertically welded on the upper surface of the steel bottom plate (102), and the wavelength directions of the corrugated steel plates (101) are parallel to the horizontal plane;
the two side edges of the steel bottom plate (102) along the length direction are respectively marked as an edge A and an edge B, and the two corrugated steel plates (101) are respectively close to the edge A and the edge B of the steel bottom plate (102);
the upper edge of each wave-shaped steel plate (101) is vertically welded with a steel wing plate (103), and the two steel wing plates (103) form an internal curled edge;
a space surrounded by the corrugated steel plate (101), the steel base plate (102) and the steel wing plate (103) is marked as a cavity S, and a plurality of prestressed reinforcements (105) penetrate into the cavity S along the length direction of the steel base plate (102); the concrete is filled in the cavity S;
a plurality of section steel shearing resistant pieces (104) are uniformly welded on the upper surfaces of the two steel wing plates (103), and two ends of each section steel shearing resistant piece (104) are respectively welded on the two steel wing plates (103).
2. The T-beam of web-encased corrugated steel sheet of claim 1, wherein: the cross section of the section steel shearing resistant part (104) is I-shaped, the section steel shearing resistant part (104) comprises an upper flange, a lower flange and a middle web plate, and the lower flange of the section steel shearing resistant part (104) is welded with the two steel wing plates (103) at the same time.
3. The T-beam of web-encased corrugated steel sheet of claim 1, wherein: the distance between each prestressed steel bar (105) and the steel bottom plate (102) is gradually increased from the midspan position of the steel-concrete composite web plate (1) to the fulcrum position.
4. The T-beam of web-encased corrugated steel sheet of claim 1, wherein: and a plurality of layers of steel bar meshes (201) are arranged in the concrete top plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910976292.5A CN110904809A (en) | 2019-10-15 | 2019-10-15 | T beam with corrugated steel plate wrapped outside web |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910976292.5A CN110904809A (en) | 2019-10-15 | 2019-10-15 | T beam with corrugated steel plate wrapped outside web |
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| CN110904809A true CN110904809A (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910976292.5A Pending CN110904809A (en) | 2019-10-15 | 2019-10-15 | T beam with corrugated steel plate wrapped outside web |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441235A (en) * | 2020-04-02 | 2020-07-24 | 广西翔路建设有限责任公司 | Combined web structure of double-layer corrugated steel web internally filled with concrete |
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2019
- 2019-10-15 CN CN201910976292.5A patent/CN110904809A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441235A (en) * | 2020-04-02 | 2020-07-24 | 广西翔路建设有限责任公司 | Combined web structure of double-layer corrugated steel web internally filled with concrete |
| CN111441235B (en) * | 2020-04-02 | 2021-07-06 | 广西北投公路建设投资集团有限公司 | Combined web structure of double-layer corrugated steel web internally filled with concrete |
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