CN109779148B - Detachable assembled steel-precast slab combination beam - Google Patents
Detachable assembled steel-precast slab combination beam Download PDFInfo
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- CN109779148B CN109779148B CN201910167848.6A CN201910167848A CN109779148B CN 109779148 B CN109779148 B CN 109779148B CN 201910167848 A CN201910167848 A CN 201910167848A CN 109779148 B CN109779148 B CN 109779148B
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Abstract
The invention belongs to the technical field of building composite beams, and discloses a detachable assembled steel-precast slab composite beam, wherein a short H-shaped steel shear pier and a double-spliced groove-type shear pier are mounted on a section steel beam; a prefabricated plate connecting cover plate is arranged on one side of the top surface of the prefabricated flange plate; and fastening the prefabricated plate connecting cover plate, the prefabricated flange plate and the upper flange of the shear pier together by using a high-strength bolt penetrating through the assembling connecting hole, so as to realize the assembling connection of the flange plate and the shear pier of the assembled steel-prefabricated plate composite beam. The detachable assembled steel-precast slab combination beam changes the combination mode of the traditional beam-concrete combination beam, changes the original shear connecting piece into a shear pier and changes a cast-in-place concrete wing plate into a precast slab; the shear piers are not directly buried in the wing plates, but are used for connecting the steel beams at the lower part with the prefabricated flange plates at the upper part, and the shear piers are fixedly connected with the prefabricated plates at the upper part and the steel beams at the lower part through high-strength bolts.
Description
Technical Field
The invention belongs to the technical field of building composite beams, and particularly relates to a detachable assembled steel-precast slab composite beam.
Background
The traditional steel-precast slab combined beam consists of a lower steel beam and an upper concrete wing plate, and shear connectors (studs, channel steel, bent ribs and the like) are arranged between the steel beam and the concrete wing plate to resist the relative sliding and lifting action of the steel beam and the concrete wing plate at an interface, so that the steel beam and the concrete wing plate are integrated and work together. The steel-precast slab composite beam can fully exert the mechanical properties of the materials of the steel which is tensioned and the concrete which is compressed through reasonable section design. Compared with reinforced concrete beams, the reinforced concrete beam has the advantages that the self weight of the structure can be reduced, the section size is reduced, the effective use space is increased, the ductility of the beam is increased, and the like; compared with steel beams, the steel beam can reduce the steel consumption, increase the rigidity, increase the stability and the integrity, enhance the fire resistance and the durability of the structure and the like, is a structural member with very good stress performance, and is widely applied in the field of civil engineering at present. The flange plate of the traditional steel-precast slab composite beam is a cast-in-place concrete floor, one end of a shear connector is welded with the steel beam flange plate, the other end of the shear connector is embedded in the cast-in-place concrete slab, the height of the section of the composite beam is the sum of the height of the lower steel beam and the height of the upper concrete wing plate, and when the height of the section of the composite beam needs to be increased, the height of the lower steel beam or the thickness of the upper concrete wing plate must be increased, so that the self weight of the structure is inevitably increased, and the.
In summary, the problems of the prior art are as follows: because the flange plate of the traditional steel-precast slab composite beam adopts the cast-in-place concrete slab, the disassembly and the reutilization of the composite beam cannot be realized, and the industrialization degree of the construction is difficult to improve; when the section height of the traditional steel-precast slab composite beam needs to be increased, the height of a lower steel beam or the thickness of an upper concrete wing plate needs to be increased, so that the self weight of the structure is increased, and the engineering cost is increased.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a detachable assembled steel-precast slab combined beam.
The invention is realized in such a way that the detachable assembled steel-precast slab combination beam is provided with:
a section steel beam;
the short H-shaped steel shear piers and the double-spliced groove-type shear piers are assembled on the section steel beams;
the upper flange plate of the detachable assembly type steel-precast slab combined beam is a prefabricated assembly type plate; the prefabricated flange plate comprises a prefabricated plate with a rib and a prefabricated plate without the rib; the prefabricated flange plates are prefabricated concrete plates, prefabricated wood floor slabs or other prefabricated floor plates, and the peripheries of the prefabricated flange plates are provided with assembling connecting holes.
Furthermore, a prefabricated plate connecting cover plate is arranged on one side of the top surface of the prefabricated assembly type flange plate, and an assembly connecting hole is formed in the prefabricated plate connecting cover plate.
Further, the upper flanges and the lower flanges of the short H-shaped steel shear piers and the double-spliced groove-type shear piers are provided with assembling connecting holes; the double-spliced groove-shaped shear pier is used for connecting ribbed parts of the prefabricated plates, and the short H-shaped steel shear pier is used for connecting the rib-free parts of the prefabricated plates.
Furthermore, the upper flange of the shear pier, the prefabricated flange plate and the prefabricated plate assembly connecting cover plate are fastened and connected through a first high-strength bolt, so that the prefabricated flange plate of the assembled steel-prefabricated plate combination beam can be detachably assembled and connected.
Further, the lower flange of the shear pier is assembled and connected with the section steel beam through a second high-strength bolt, or the second high-strength bolt is adopted to assist in bolt-welding mixed connection of a welding line.
Furthermore, the section steel beam adopts hot-rolled H-shaped steel, high-frequency welded light H-shaped steel or welded H-shaped combined section.
The invention has the advantages and positive effects that: the detachable assembled steel-precast slab combination beam changes the combination mode of a steel beam and a flange plate, changes the original shear connecting piece into a shear pier and changes a cast-in-place concrete wing plate into a precast slab; the shear piers are not directly embedded in the wing plates, but are used for connecting the steel beams at the lower part with the prefabricated plates at the upper part, and the shear piers are fixedly connected with the prefabricated plates at the upper part and the steel beams at the lower part through high-strength bolts.
The detachable assembled steel-precast slab combined beam transmits the shearing force between the flange plate and the lower steel beam through the shearing force piers, the shearing force piers are arranged between the steel beams and the flange plate in a clearance mode, and a clearance exists between the piers; firstly, the height of the section of the combined beam is changed from the original height of the steel beam and the height of the flange plate into the sum of the height of the steel beam, the height of the shear pier and the height of the flange plate, the height of the section of the combined beam can be adjusted by adjusting the height of the shear pier to form an effective mode, and the shear piers are arranged in a clearance way, so that the self weight of the structure is reduced; secondly, the detachable assembly type steel-precast slab combined beam introduces a detachable assembly connection technology, the industrialization level of member production is greatly improved, and meanwhile, the combined beam can be reassembled in different places after being disassembled, and the recycling of the structure can be realized. Due to the introduction of industrial production, the high-performance concrete with the grade of C60 or above can be conveniently applied to the prefabricated flange plate of the detachable prefabricated steel-prefabricated plate composite beam, and has important significance for improving the section bearing capacity of the composite beam and reducing the self weight of the structure. The comparative analysis with the traditional steel-precast slab composite beam shows that: under the condition of the same section height and section bending resistance bearing capacity, the structural dead weight of the detachable assembled steel-precast slab soil combined beam can be reduced by 30 percent; under the condition of same section resistance and meeting the requirement of rigidity, when the strength grade of the prefabricated assembly type concrete wing plate concrete is changed from the commonly used C30 to C60, the beam height of the detachable assembly type steel-precast slab combined beam can be reduced by 20 percent, and the effects of reducing the self weight of the structure and the height of the structure layer are obvious, so that the earthquake acting force of the structure floor can be reduced, and the earthquake resistance of the structure is improved. Meanwhile, the construction engineering cost can be effectively reduced by reducing the height of the structural layer.
The gap between the shear piers of the fabricated composite beam can provide an installation space for a beam penetrating pipeline of a building, and is beneficial to the use of the space of the building.
Drawings
Fig. 1 is a schematic structural view of a detachable prefabricated steel-precast slab composite beam according to an embodiment of the present invention.
Fig. 2 is a schematic bottom view of a fabricated composite beam formed by assembling according to an embodiment of the present invention.
Fig. 3 is a schematic view of a fabricated composite beam assembled and formed rear plate surface according to an embodiment of the present invention.
FIG. 4 is a schematic diagram of a fabricated concrete wing panel structure provided by an embodiment of the present invention;
in the figure: (a) the ribbed precast slab; (b) the prefabricated panel is not provided with ribs.
FIG. 5 is a schematic view of a shear pier configuration provided by an embodiment of the invention;
in the figure (a); short H-shaped steel shear piers; (b) double-spliced groove type shear pier.
FIG. 6 is a schematic view of the shear pier assembled with the lower section steel beam according to the embodiment of the invention;
in the figure (a); the shear pier is assembled and connected with the section steel beam high-strength bolt; (b) the shear pier is connected with the section steel beam in a bolt-welding mixed mode.
FIG. 7 is a schematic view of a connection cover plate structure of a prefabricated plate according to an embodiment of the present invention;
in the figure: 1. a section steel beam; 2. prefabricating an assembled flange plate; 3. short H-shaped steel shear piers; 4. a double-spliced groove-shaped shear pier; 5. the prefabricated plate is connected with the cover plate; 6. assembling the connecting hole; 7. a first high-strength bolt; 8. a second high-strength bolt; 9. an upper flange; 10. a lower flange;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
As shown in fig. 1 to 3, an embodiment of the present invention provides the detachable fabricated steel-precast concrete panel composite girder including: the prefabricated concrete slab comprises a section steel beam 1, a prefabricated assembled concrete slab 2, a short H-shaped steel shear pier 3, a double-spliced groove type shear pier 4, a prefabricated concrete slab connecting cover plate 5 and an assembling connecting hole 6.
As shown in fig. 1 and 4, the flange plate of the detachable precast concrete slab combination beam according to the embodiment of the present invention adopts a precast concrete slab 2, the precast concrete slab 2 includes two types of precast slabs with and without ribs, and the precast flange plate is pre-designed with an assembly coupling hole 6.
As shown in fig. 1 and 5, the shear pier according to the embodiment of the invention comprises a short H-shaped steel shear pier 3 and a double-spliced groove-type shear pier 4; the short H-shaped steel shear piers 3 are used for connecting rib-free parts of the prefabricated plates, and the double-spliced groove-type shear piers 4 are used for connecting ribbed parts of the prefabricated plates; the shear piers are arranged between the section steel beam 1 and the prefabricated slab 2 at intervals; the upper flange 9 and the lower flange 10 of the shear pier are respectively provided with an assembling connecting hole 6.
As shown in fig. 1, 6 and 7, corresponding to the positions of the shear piers, a precast slab connection cover plate 5 is arranged at the top of the prefabricated assembly type concrete flange plate 2 of the detachable composite beam according to the embodiment of the invention; an assembly connecting hole 6 is formed in the connecting cover plate 5 and corresponds to an assembly connecting hole formed in the prefabricated assembly type concrete flange plate 2; the connecting cover plate 5, the prefabricated assembly type concrete flange plate 2 and the upper flange of the shear pier are fastened through the high-strength bolt 7, so that the assembly and disassembly assembly connection of the assembly type prefabricated flange plate of the composite beam in the embodiment of the invention is realized; the connection between the lower flange of the shear pier and the section steel beam 1 can be realized by a second high-strength screw fastening connection, and also can be realized by a bolt-welding mixed connection of a second high-strength bolt and a welding line.
In the embodiment of the invention, the steel beam, the shear pier, the precast concrete wing plate and the upper precast connecting cover plate are fixedly connected through the high-strength bolt, and the situation after the composite beam is formed is shown in figures 2 and 3.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, as any variations, equivalents, or improvements made within the spirit and principles of the present invention are intended to be covered thereby.
Claims (4)
1. A detachable assembled steel-precast slab composite girder, which is characterized in that:
a section steel beam;
the short H-shaped steel shear piers and the double-spliced groove-type shear piers are assembled on the section steel beams;
a prefabricated plate connecting cover plate is arranged on one side of the top surface of the prefabricated assembly type flange plate, and an assembly connecting hole is formed in the prefabricated plate connecting cover plate;
the flange plate of the assembled steel-precast slab combination beam is a prefabricated flange plate; the prefabricated flange plate comprises a prefabricated plate with a rib and a prefabricated plate without the rib; and the prefabricated assembly type flange plate is internally provided with an assembly connecting hole.
2. The detachable assembled steel-precast slab composite beam as set forth in claim 1, wherein the upper flanges and the lower flanges of the short H-shaped steel shear pier and the double-spliced channel-type shear pier are provided with the assembly connection holes; the double-spliced groove-shaped shear pier is used for connecting ribbed parts of the prefabricated plates, and the short H-shaped steel shear pier is used for connecting non-ribbed parts of the prefabricated plates.
3. The detachable assembled steel-precast slab composite beam as set forth in claim 1, wherein the upper flange of the shear pier is fastened to the upper prefabricated assembled flange plate and the precast slab connection cover plate by means of a first high-strength bolt passing through the assembly connection hole; the lower flange of the shear pier is connected with the lower section steel by adopting a second high-strength bolt for assembly connection, or the bolt welding mixed connection of the high-strength bolt and a welding line.
4. A detachable assembled steel-precast slab combined beam as set forth in claim 1, wherein the section steel beam is a hot rolled H-section steel, a high frequency welded lightweight H-section steel, or a welded H-shaped combined section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910167848.6A CN109779148B (en) | 2019-03-06 | 2019-03-06 | Detachable assembled steel-precast slab combination beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910167848.6A CN109779148B (en) | 2019-03-06 | 2019-03-06 | Detachable assembled steel-precast slab combination beam |
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| CN109779148A CN109779148A (en) | 2019-05-21 |
| CN109779148B true CN109779148B (en) | 2021-07-16 |
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| CN113774781A (en) * | 2021-09-07 | 2021-12-10 | 湖南路桥建设集团有限责任公司 | Shear part joint composite structure of composite beam bridge and construction method thereof |
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| JP2002061329A (en) * | 2000-08-22 | 2002-02-28 | Taisei Corp | Micro vibration control frame |
| CN204983396U (en) * | 2015-09-29 | 2016-01-20 | 南京林业大学 | Bamboo - aerated concrete combination beam |
| CN206667037U (en) * | 2017-03-28 | 2017-11-24 | 宁波金蛟龙重工钢构有限公司 | Replaceable prefabricated assembled combined beam structure |
| CN106968180B (en) * | 2017-04-20 | 2019-03-22 | 崔冰 | A kind of dry type connection method of the concrete slab and girder steel of the mixed combination beam of steel- |
| CN107447921A (en) * | 2017-09-13 | 2017-12-08 | 清华大学 | High ductile steel-the concrete combination beam of detachable assembling type |
| CN108193588A (en) * | 2017-12-29 | 2018-06-22 | 西南交通大学 | A kind of assembled steel-mixed bondbeam shear connector |
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