CN218951942U - Prefabricated composite beam of assembled - Google Patents
Prefabricated composite beam of assembled Download PDFInfo
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- CN218951942U CN218951942U CN202223090382.0U CN202223090382U CN218951942U CN 218951942 U CN218951942 U CN 218951942U CN 202223090382 U CN202223090382 U CN 202223090382U CN 218951942 U CN218951942 U CN 218951942U
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Abstract
The utility model relates to an assembled precast composite beam, which belongs to the technical field of bridge composite beams, and comprises a steel beam, a shear connection assembly, precast concrete plates and filled concrete, wherein a plurality of shear connection assemblies are arranged on the steel beam at intervals, each shear connection assembly comprises I-steel and a mounting piece, the mounting piece is arranged on the I-steel, and the I-steel is arranged on the steel beam through the mounting piece; the precast concrete board is arranged on the steel beam, a plurality of shear holes are formed in the precast concrete board, and filled concrete is arranged in the shear holes and used for connecting the I-steel and the precast concrete board into a whole. Staff installs the I-steel to the girder steel through the installed part, then hoists precast concrete board to the girder steel on, uses filling concrete to fill the shear force hole, connects I-steel and precast concrete board as a whole, replaces the peg through the I-steel, effectively improves and need weld a large amount of pegs and then influence the problem of site operation progress on the current composite beam.
Description
Technical Field
The application relates to the technical field of bridge composite beams, in particular to an assembled prefabricated composite beam.
Background
Beams formed by combining two different materials or combining different procedures are called as combined beams, also called as combined beams, wherein some main beams adopt one material, and bridge decks for connecting the main beams adopt another material; there are also composite beams consisting of precast reinforced concrete beams or prestressed concrete beams and reinforced concrete bridge decks poured in situ.
At present, a combined beam for a bridge is usually a steel-concrete combined beam, and a shear connector is mainly arranged on a steel beam and comprises a plurality of pegs, and a shear hole for accommodating the shear connector is formed in a precast concrete slab; during installation, the precast concrete slab is hoisted onto the steel beam, the shear connecting piece is positioned in the shear hole, and then concrete is poured into the shear hole, so that the steel beam and the precast concrete slab are integrated, lifting and relative sliding of the steel beam and the precast concrete slab at the interface are resisted, the advantages of steel tensile and concrete compression resistance are fully exerted, and the steel beam and the concrete compression resistance composite material has the advantages of high bearing capacity, high rigidity, good shock resistance and dynamic performance, small cross section size of a component, convenience in construction and the like.
With respect to the above-described related art, the inventors found that there are the following drawbacks: because of the limited load bearing capacity of a single peg, a shear connector typically needs to include a large number of pegs, and each peg needs to be welded to the steel beam in turn, which is time consuming and labor intensive, affecting the field construction progress.
Disclosure of Invention
In order to solve the problem that a large number of pegs are required to be welded on an existing composite beam so as to influence the site construction progress, the application provides an assembled prefabricated composite beam.
The application provides an assembled prefabricated composite beam adopts following technical scheme:
the assembled prefabricated composite beam comprises a steel beam, a shear connection assembly, prefabricated concrete plates and filled concrete, wherein the steel beam is provided with a plurality of shear connection assemblies, the shear connection assembly is arranged on the steel beam at intervals, the shear connection assembly comprises I-steel and mounting pieces, the mounting pieces are arranged on the I-steel, and the I-steel is arranged on the steel beam through the mounting pieces; the precast concrete board sets up on the girder steel, a plurality of shear force hole has been seted up on the precast concrete board, the setting of filling concrete is in the shear force hole and is used for connecting I-steel and precast concrete board as a whole.
Through adopting above-mentioned technical scheme, the staff installs the I-steel to the girder steel through the installed part, then lifts by crane precast concrete board for the shear force hole is just right with the I-steel, descends precast concrete board to the girder steel again on, uses filling concrete to fill the shear force hole, and filling concrete is connected I-steel and precast concrete board as a whole, and then makes girder steel and precast concrete board connect as a whole, replaces the peg through the I-steel, effectively improves the problem that needs welding a large amount of pegs and then influences the site operation progress on the current composite beam, and the I-steel is great with filling concrete's transverse connection face, and then can effectively improve girder steel and precast concrete board's anti lifting ability.
Optionally, the mounting includes fixing bolt and nut, fixing bolt passes I-steel and screw thread wears to establish on the girder steel, the nut screw thread wears to establish on fixing bolt and supports tightly with the girder steel.
Through adopting above-mentioned technical scheme, when staff installs the I-steel, pass the I-steel with fixing bolt and screw thread wears to establish to the girder steel on, then rotate the nut and make nut and girder steel support tightly, staff installs I-steel convenient and fast.
Optionally, the i-steel is provided with a reinforcing member, and the reinforcing member is used for enhancing the structural strength of the i-steel; the reinforcement comprises a plurality of reinforcement ribs and transverse ribs, wherein the reinforcement ribs are vertically arranged on the I-steel, and the transverse ribs are arranged between adjacent reinforcement ribs.
By adopting the technical scheme, the reinforcing ribs and the transverse ribs effectively enhance the compressive and shearing resistance of the I-steel, and further effectively improve the lifting resistance and the sliding resistance of the steel beams and the precast concrete boards.
Optionally, an extension plate is arranged at the bottom of the I-steel.
Through adopting above-mentioned technical scheme, the extension board increases the area of contact of I-steel and girder steel, and then when making the I-steel pressurized, the pressure that receives can more disperse to the girder steel on, and then promotes the compressive capacity of I-steel, and effectively improves the tightness that I-steel and girder steel are connected.
Optionally, a water stop steel plate is circumferentially arranged on the side wall of the shear hole.
Through adopting above-mentioned technical scheme, after filling the concrete with shear force hole, stagnant water steel sheet effectively prevents the rainwater from leaking to the junction of filling concrete and precast concrete board on the precast concrete board, and then corrodes the component in the shear force hole, influences I-steel and precast concrete board's joint strength.
Optionally, a mortar cushion layer is arranged on the steel beam, and a rubber pressing strip is arranged on the steel beam.
By adopting the technical scheme, the abutting surface of the steel beam and the precast concrete slab is protected by the mortar cushion layer, and the steel beam is prevented from being damaged by friction with the steel beam caused by installing the precast concrete slab, so that the steel beam is easy to corrode in subsequent use; the rubber layering effectively improves the frictional force that precast concrete slab and girder steel are connected, prevents to produce the mutual slip between precast concrete slab and the girder steel, and the rubber strip seals girder steel and precast concrete slab's butt department, reinforcing girder steel and precast concrete slab's compactness of being connected.
Optionally, a beam is disposed between the adjacent steel beams, and two ends of the beam are detachably connected with one steel beam respectively.
By adopting the technical scheme, the adjacent steel beams are connected into a whole through the cross beams, and the shearing resistance of the adjacent steel beams when being subjected to shearing force is improved.
Optionally, a plurality of pre-buried rings are arranged on the precast concrete board.
Through adopting above-mentioned technical scheme, when hoist and mount precast concrete board, the staff directly uses the lifting hook to pre-buried ring on, and the staff hoist and mount precast concrete board is convenient.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the staff installs the I-steel on the girder steel through the mounting, then lifts the precast concrete slab, make the shear hole opposite to I-steel, and then descend the precast concrete slab to the girder steel, use the filling concrete to pack the shear hole, precast concrete connect I-steel and precast concrete slab as a whole, and then make girder steel and precast concrete slab connect as a whole, replace the peg through I-steel, need weld a large amount of pegs on the existing composite beam and then influence the problem of the construction progress of the scene effectively, and I-steel and filling concrete's transverse junction surface is great, and then can effectively improve girder steel and precast concrete slab's anti-lift ability;
2. the reinforcing ribs and the transverse ribs effectively enhance the compression resistance and shear resistance of the I-steel, and further effectively improve the lifting resistance and the sliding resistance of the steel beam and the precast concrete slab;
3. the mortar cushion layer protects the abutting surface of the steel beam and the precast concrete slab, prevents the steel beam from being rubbed by the precast concrete slab during installation so as to damage antirust paint and the like on the steel beam, and ensures that the steel beam is easy to corrode during subsequent use; the rubber layering effectively improves the frictional force that precast concrete board and girder steel are connected, prevents to produce the mutual slip between precast concrete board and the girder steel.
Drawings
Fig. 1 is a schematic structural view of an assembled prefabricated composite beam according to an embodiment of the present application.
Fig. 2 is a partial structural cross-sectional view of an embodiment of the present application.
Fig. 3 is an exploded schematic view of a part of the structure of an embodiment of the present application.
Reference numerals: 1. a steel beam; 2. a shear connection assembly; 21. i-steel; 22. a mounting member; 221. a fixing bolt; 222. a nut; 3. prefabricating concrete slabs; 31. a shear hole; 4. filling concrete; 5. a reinforcing member; 51. reinforcing ribs; 52. a cross rib; 6. an extension plate; 7. a water-stopping steel plate; 8. a mortar cushion layer; 9. a rubber batten; 10. a cross beam; 11. and embedding the ring.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-3.
The embodiment of the application discloses an assembled prefabricated composite beam.
Referring to fig. 1 and 2, the fabricated precast composite beam comprises a steel beam 1, a shear connection assembly 2, precast concrete slabs 3 and filled concrete 4, wherein a plurality of the shear connection assemblies 2 are installed on the steel beam 1 at intervals, the shear connection assembly 2 comprises i-beams 21 and installation pieces 22, the installation pieces 22 are installed on the i-beams 21, and the i-beams 21 are installed on the steel beam 1 through the installation pieces 22; the precast concrete slab 3 is arranged on the steel beam 1, a plurality of shear holes 31 are formed in the precast concrete slab 3, and the filling concrete 4 is poured in the shear holes 31 and used for connecting the I-steel 21 and the precast concrete slab 3 into a whole.
In this embodiment, the steel beam 1 includes a lower flange plate, a connecting plate, an upper flange plate and a web, the connecting plate connects the upper flange plate and the lower flange plate, the web is disposed between the upper flange plate and the lower flange plate, the web is used to promote the bearing capacity and the shearing capacity of the steel beam 1, the i-steel 21 is installed on the upper flange plate through the installation piece 22, and the steel beam 1 is installed on each adjacent pier; the filling concrete 4 is micro-expansion concrete with a concrete mark higher than the precast concrete board 3, and can effectively improve the situation that the filling concrete is cracked or is not tightly connected with the side wall of the shear hole 31 due to the thermal expansion and contraction property of the concrete after being poured into the shear hole 31.
The staff installs I-steel 21 to girder steel 1 through mounting 22, then lift by crane precast concrete board 3 for shear force hole 31 is just right with I-steel 21, on the precast concrete board 3 was down again to girder steel 1, use filling concrete 4 to fill shear force hole 31, filling concrete 4 connects I-steel 21 and precast concrete board 3 as a whole, and then make girder steel 1 and precast concrete board 3 connect as a whole, replace traditional peg through I-steel 21, effectively improve on the current composite beam need weld a large amount of pegs and then influence the problem of site operation progress, and I-steel 21 is because the upper portion of I-steel 21 constructs to a transverse flange plate, can increase the area of contact with filling concrete 4, and then can effectively improve girder steel 1 and precast concrete board 3's anti lifting ability.
Referring to fig. 1, a plurality of pre-buried rings 11 are installed at intervals on the top side of the precast concrete panel 3, and in this embodiment, the pre-buried rings 11 are U-shaped rings, which are welded to the reinforcing steel bars in the precast concrete panel 3 before the precast concrete panel 3 is poured. When the precast concrete board 3 is hoisted, a worker directly uses the hanging hook to hook the embedded ring 11, and the worker conveniently hoistes the precast concrete board 3.
Referring to fig. 2 and 3, a water stop steel plate 7 is circumferentially mounted on a side wall of the shear hole 31, and in this embodiment, the water stop steel plate 7 is a U-shaped steel plate, and an opening of the water stop steel plate 7 faces a side away from the i-steel 21. After the shear holes 31 are filled with the filled concrete 4, the water stop steel plates 7 effectively prevent rainwater from leaking to the joint of the filled concrete 4 and the precast concrete plates 3 from the precast concrete plates 3, and further the components in the shear holes 31 are corroded, so that the connection strength of the I-steel 21 and the precast concrete plates 3 is affected.
Referring to fig. 2 and 3, the i-beam 21 is provided with a reinforcing member 5, and the reinforcing member 5 is used for reinforcing the structural strength of the i-beam 21; the reinforcing member 5 includes reinforcing ribs 51 and cross ribs 52, the reinforcing ribs 51 are installed in plurality, the reinforcing ribs 51 are vertically installed on the i-steel 21, and the cross ribs 52 are installed between adjacent reinforcing ribs 51. In this embodiment, the reinforcing ribs 51 and the transverse ribs 52 are all steel plates and are integrally formed with the i-steel 21, and in other embodiments, the reinforcing ribs 51 and the transverse ribs 52 may be welded on the i-steel 21 at a later stage.
The reinforcing ribs 51 and the transverse ribs 52 effectively enhance the compressive and shear resistance of the I-steel 21, and further effectively improve the lifting resistance and the sliding resistance of the steel beam 1 and the precast concrete slab 3.
Referring to fig. 2 and 3, the mounting member 22 includes a fixing bolt 221 and a nut 222, the fixing bolt 221 passes through the i-beam 21 and is threaded on the steel beam 1, the nut 222 is threaded on the fixing bolt 221 and abuts against the steel beam 1, in this embodiment, a threaded hole is formed in a bottom flange plate of the i-beam 21, and a threaded hole adapted to the threaded hole is formed in the steel beam 1. When the worker installs the I-steel 21, the fixing bolt 221 passes through the I-steel 21 and is threaded on the steel beam 1, and then the nut 222 is rotated to enable the nut 222 to be abutted against the steel beam 1, so that the worker installs the I-steel 21 conveniently and rapidly.
Referring to fig. 2 and 3, an extension plate 6 is mounted on the bottom of the i-beam 21, and in this embodiment, the extension plate 6 is a steel plate and is integrally formed with the i-beam 21, and the extension plate 6 is fixed to the steel beam 1 by a mounting member 22. The extension plate 6 increases the area of contact of the I-steel 21 and the steel beam 1, so that when the I-steel 21 is pressed, the pressed force can be more dispersed to the steel beam 1, the pressing capacity of the I-steel 21 is further improved, and the connection tightness of the I-steel 21 and the steel beam 1 is effectively improved.
Referring to fig. 2 and 3, a mortar cushion layer 8 is covered on the steel beam 1, and a rubber batten 9 is installed on the steel beam 1, in this embodiment, the mortar cushion layer 8 is an epoxy mortar layer, and has the advantages of abrasion resistance, corrosion resistance, freeze thawing resistance and the like, the cross section layout of the mortar cushion layer 8 is a rectangular block, and the mortar cushion layer 8 is arranged on the steel beam 1 between adjacent i-beams 21 at intervals; the rubber batten 9 can be made of ethylene propylene diene monomer rubber, butyl rubber and the like, and in the embodiment, the rubber batten 9 is made of butyl rubber, and has the advantages of high extensibility, good water tightness, aging resistance, corrosion resistance and the like, and the rubber batten 9 is adhered to the edge of the upper surface of the steel beam 1.
The mortar cushion layer 8 protects the abutting surface of the steel beam 1 and the precast concrete slab 3, prevents the steel beam 1 from being damaged by friction with the steel beam 1 when the precast concrete slab 3 is installed, and enables the steel beam 1 to be easily corroded in subsequent use; the rubber batten 9 effectively improves the frictional force that precast concrete slab 3 and girder steel 1 are connected, prevents to produce the mutual slip between precast concrete slab 3 and the girder steel 1, and the compactness that precast concrete slab 3 and girder steel 1 are connected is strengthened to rubber batten 9, prevents that the rainwater from the butt department infiltration of precast concrete slab 3 and girder steel 1 from causing the corruption to inner structure.
Referring to fig. 1 and 2, a cross beam 10 is installed between adjacent steel beams 1, two ends of the cross beam 10 are detachably connected with one steel beam 1 respectively, in this embodiment, the cross beam 10 is a section steel with a rectangular cross section, two ends of the cross beam 10 are welded with connecting steel plates respectively, the connecting steel plates penetrate through bolt threads, and the connecting steel plates penetrate through the steel beams 1 to achieve detachable connection of the cross beam 10 and the steel beams 1, and in other embodiments, two ends of the cross beam 10 can be fixed on the steel beams 1 through welding. The cross beam 10 connects adjacent steel beams 1 as a whole, and improves the shearing resistance of the adjacent steel beams 1 when subjected to shearing force.
The implementation principle of the prefabricated assembled composite beam of the embodiment of the application is as follows: staff fixes I-steel 21 to girder steel 1 through fixing bolt 221 and nut 222, then lift precast concrete board 3 to girder steel 1 through the built-in fitting, I-steel 21 is located shear force hole 31 this moment, pour filling concrete 4 to shear force hole 31 again, after filling concrete 4 congeals, girder steel 1 is connected as a whole with precast concrete board 3, whole installation replaces the peg through I-steel 21, installation convenient and fast, effectively improve the problem that needs a large amount of pegs of welding and then influence the site operation progress on the current composite beam, and the transverse connection face of I-steel 21 top transverse flange plate and filling concrete 4 is great, and then can effectively improve girder steel 1 and precast concrete board 3's anti lifting ability.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (8)
1. The utility model provides an assembled prefabricated composite beam which characterized in that: the novel concrete-filled steel tube shear connection device comprises a steel beam (1), a shear connection assembly (2), precast concrete plates (3) and filled concrete (4), wherein the steel beam (1) is provided with a plurality of shear connection assemblies (2), the steel beam (1) is provided with a plurality of shear connection assemblies at intervals, the shear connection assembly (2) comprises I-shaped steel (21) and mounting pieces (22), the mounting pieces (22) are arranged on the I-shaped steel (21), and the I-shaped steel (21) is arranged on the steel beam (1) through the mounting pieces (22); precast concrete board (3) set up on girder steel (1), a plurality of shear force hole (31) have been seted up on precast concrete board (3), filled concrete (4) set up in shear force hole (31) and are used for being connected I-steel (21) and precast concrete board (3) as a whole.
2. A fabricated, prefabricated composite beam according to claim 1, wherein: the mounting piece (22) comprises a fixing bolt (221) and a nut (222), wherein the fixing bolt (221) penetrates through the I-shaped steel (21) and is threaded on the steel beam (1), and the nut (222) is threaded on the fixing bolt (221) and is abutted against the steel beam (1).
3. A fabricated, prefabricated composite beam according to claim 1, wherein: the I-steel (21) is provided with a reinforcing piece (5), and the reinforcing piece (5) is used for reinforcing the structural strength of the I-steel (21); the reinforcement (5) comprises a reinforcement rib (51) and a transverse rib (52), wherein a plurality of reinforcement ribs (51) are arranged, the reinforcement ribs (51) are vertically arranged on the I-steel (21), and the transverse rib (52) is arranged between every two adjacent reinforcement ribs (51).
4. A fabricated, prefabricated composite beam according to claim 1, wherein: an extension plate (6) is arranged at the bottom of the I-steel (21).
5. A fabricated, prefabricated composite beam according to claim 1, wherein: and a water stop steel plate (7) is circumferentially arranged on the side wall of the shear hole (31).
6. A fabricated, prefabricated composite beam according to claim 1, wherein: the steel beam (1) is provided with a mortar cushion layer (8), and the steel beam (1) is provided with a rubber pressing strip (9).
7. A fabricated, prefabricated composite beam according to claim 1, wherein: a cross beam (10) is arranged between the adjacent steel beams (1), and two ends of the cross beam (10) are detachably connected with one steel beam (1) respectively.
8. A fabricated, prefabricated composite beam according to claim 1, wherein: the precast concrete board (3) is provided with a plurality of embedded rings (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223090382.0U CN218951942U (en) | 2022-11-17 | 2022-11-17 | Prefabricated composite beam of assembled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223090382.0U CN218951942U (en) | 2022-11-17 | 2022-11-17 | Prefabricated composite beam of assembled |
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| Publication Number | Publication Date |
|---|---|
| CN218951942U true CN218951942U (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223090382.0U Active CN218951942U (en) | 2022-11-17 | 2022-11-17 | Prefabricated composite beam of assembled |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067313A (en) * | 2019-05-22 | 2019-07-30 | 重庆交通大学 | Pressure-bearing-shearing-type connector |
-
2022
- 2022-11-17 CN CN202223090382.0U patent/CN218951942U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067313A (en) * | 2019-05-22 | 2019-07-30 | 重庆交通大学 | Pressure-bearing-shearing-type connector |
| CN110067313B (en) * | 2019-05-22 | 2024-04-26 | 重庆交通大学 | Pressure-bearing shearing type connecting piece |
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