CN215406916U - Prefabricated hollow II type web type steel-concrete composite beam of assembled - Google Patents
Prefabricated hollow II type web type steel-concrete composite beam of assembled Download PDFInfo
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- CN215406916U CN215406916U CN202121894114.7U CN202121894114U CN215406916U CN 215406916 U CN215406916 U CN 215406916U CN 202121894114 U CN202121894114 U CN 202121894114U CN 215406916 U CN215406916 U CN 215406916U
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- 239000004567 concrete Substances 0.000 title claims abstract description 53
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 70
- 239000010959 steel Substances 0.000 claims abstract description 70
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 16
- 238000003466 welding Methods 0.000 claims abstract description 8
- 239000011374 ultra-high-performance concrete Substances 0.000 claims description 12
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 229910000746 Structural steel Inorganic materials 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000009415 formwork Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
A prefabricated hollow II-type web type steel reinforced concrete composite beam comprises: the hollow II-shaped web section steel is formed by welding two steel plates and two corrugated webs; longitudinal ribs which are arranged at the bottom and the top of the lower flange of the hollow II-shaped web steel and are parallel to the length direction of the beam; the rectangular hollow inner die is arranged inside the hollow II-shaped web profile steel and is parallel to the length direction of the beam; the closed stirrups are arranged around the hollow II-shaped web profile steel and wrapped with the longitudinal ribs; and a concrete outer shell poured outside the hollow II-type web profile steel and a concrete inner shell poured between the rectangular hollow inner mold and the hollow II-type web profile steel. The invention reduces the steel consumption, provides larger plane external rigidity, improves the bending resistance bearing capacity of the composite beam, ensures the shearing resistance bearing capacity of the web plate, reduces the concrete consumption, reduces the self weight of the structure and obviously improves the anti-seismic performance. The invention has reasonable stress of the structure, improves the use efficiency of the material, saves the material, reduces the manufacturing cost, has wide application and is convenient and fast for site construction.
Description
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to a prefabricated assembly type hollow II-shaped web steel-concrete composite beam.
Background
The traditional building structure is mainly a reinforced concrete structure, the structural form which is applied most widely at the earliest is a cast-in-place reinforced concrete structure, but the construction process has many defects, such as the on-site formwork erecting and the construction process are various, the process is complicated, the labor force consumption is large, the material consumption is large, the construction period is long, and the like, and along with the rapid development of economy, the high-rise, super high-rise and large-span spatial structure is continuously increased, the load born by the component is also multiplied, in order to meet the bearing requirement of the main body structure, the section size of the component must be increased to meet the requirement, the dead weight of the main body structure is increased, the spatial layout and the attractiveness are influenced, and the anti-seismic performance is reduced.
Therefore, with the development of building construction technology, the steel reinforced concrete structure is produced at the same time. It is a concrete structure formed by assembling and connecting precast concrete members or components. Compared with the traditional cast-in-place concrete structure, the structural steel concrete structure has the advantages that the bearing capacity of the structural steel concrete structure is improved, the mechanical properties of good tensile property of steel and good compression property of concrete are fully exerted, the structural steel concrete structure has the characteristics of simplicity and convenience in construction, good ductility and the like, but the structural steel concrete structure also has the defects of poor integrity, complex design process, unfavorable earthquake resistance, poor impermeability, poor crack resistance in high-rise and large-span bridge structures and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the prefabricated hollow II-type web type steel-concrete composite beam, which reserves the advantages of a cast-in-place concrete structure and a steel-concrete composite structure, overcomes the defects of the two structures, and has the characteristics of good stress performance, simple and convenient construction, small self weight of the member, low manufacturing cost and wide application range.
In order to achieve the purpose, the invention adopts the technical scheme that:
a prefabricated hollow II-type web type steel reinforced concrete composite beam comprises:
the hollow II-shaped web section steel is formed by welding two steel plates and two corrugated webs;
the first longitudinal rib is arranged at the bottom of the lower flange of the hollow II-shaped web section steel and is parallel to the length direction of the beam;
the second longitudinal rib is arranged on the top of the upper flange of the hollow II-shaped web profile steel and is parallel to the length direction of the beam;
the rectangular hollow inner die is arranged inside the hollow II-shaped web profile steel and is parallel to the length direction of the beam;
the closed stirrups are arranged around the hollow II-type web profile steel and wrap the first longitudinal ribs and the second longitudinal ribs;
and the number of the first and second groups,
the concrete inner shell is poured between the rectangular hollow inner mold and the hollow II-type web section steel.
Preferably, the web is provided with trapezoidal wave and is symmetrically arranged.
Preferably, the closed hoop reinforcement, the longitudinal reinforcement I and the longitudinal reinforcement II are fixed in a welding mode; the closed stirrups are arranged at equal intervals.
Preferably, the rectangular hollow inner die is a combined rubber inner die, a foam inner die or a polystyrene core die.
Preferably, the concrete shell is made of ultra-high performance concrete; the concrete inner shell is made of common concrete or lightweight aggregate concrete.
Compared with the prior art, the invention has the beneficial effects that:
1. function improvement
The double-corrugated hollow web section steel is combined with ultra-high performance concrete (UHPC), so that the axial rigidity is greatly improved, and the bending resistance bearing capacity of the combined beam and the shearing resistance bearing capacity of the web are enhanced. The UHPC has the characteristics of high wear resistance, high strength, high toughness and low porosity, the cracking of the beam can be effectively controlled by the higher tensile strength of the UHPC, and meanwhile, the UHPC has lighter self weight and is beneficial to earthquake resistance.
2. Simple and convenient construction
The double-corrugated hollow web type steel concrete beam is produced in a factory-prefabricated large-scale high-precision mode, concrete is fully poured and vibrated in the production process, the maintenance condition is stable, and the construction quality is obviously improved. Splicing is carried out on the site of a construction site, steel bars do not need to be bound, a formwork is supported, the formwork is removed, and temporary supports do not need to be erected, so that the site construction procedures and the use of large equipment are greatly reduced, the construction efficiency is improved, and the construction period is shortened.
3. Has wide application
Compared with the traditional H-shaped steel, the dual-ripple hollow web section steel has the advantages that the steel consumption is greatly reduced on the premise of ensuring the mechanical property, the beam structure is hollow, the size of the section of the member is not large, the consumption of ultra-high performance concrete is reduced, the site construction is not needed, the labor cost and the material cost are greatly reduced, and the manufacturing cost is reduced; the beam has light self weight and good wear resistance and durability, and can be widely applied to various buildings, in particular various high-rise, super high-rise and large-span structures.
In general, the prefabricated hollow II-type web type steel concrete composite beam simplifies the construction process and the construction difficulty, effectively solves the key problem of restricting the popularization and the application of the steel concrete beam for a long time, effectively improves the disadvantages of the traditional steel concrete beam in the aspects of stress performance, durability, economic benefit and the like, and can be widely applied to various reinforced concrete structures and steel structure buildings. Therefore, the deep research on the prefabricated hollow II-type web plate type steel concrete composite beam has practical engineering significance.
Drawings
Fig. 1 is a schematic perspective view of a prefabricated assembly type hollow ii-type web type steel reinforced concrete composite beam according to the present invention.
FIG. 2 is a schematic diagram of a hollow II-type web section steel, a longitudinal rib I, a longitudinal rib II, a closed hoop rib and a hollow inner mold of the prefabricated assembly type hollow II-type web section steel-concrete composite beam.
Fig. 3 is a left side view of a prefabricated assembly type hollow ii-type web type steel reinforced concrete composite beam according to the present invention.
Fig. 4 is a detailed view of section a-a in fig. 3, that is, a cross-sectional view of the prefabricated hollow ii-type web type steel reinforced concrete composite girder.
Fig. 5 is a detail view of section B-B of fig. 3, i.e. a cross section of the beam parallel to the flange plane in the direction of the beam length at the center of the web.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
The present invention is a prefabricated assembly type hollow ii-type web type steel reinforced concrete composite beam, as shown in fig. 1, 2, 3, 4 and 5, which comprises:
the hollow II-shaped web section steel 2 is formed by welding two steel plates and two webs, wherein the two steel plates are respectively used as an upper flange and a lower flange; the two webs can be corrugated webs, such as trapezoidal corrugated webs, and are symmetrically arranged.
And the longitudinal rib I3 is arranged at the bottom of the lower flange of the hollow II-shaped web section steel 2 and is parallel to the length direction of the beam.
And the longitudinal ribs II 4 are arranged at the top of the upper flange of the hollow II-shaped web profile steel 2 and are parallel to the length direction of the beam.
And the rectangular hollow inner die 5 is arranged inside the hollow II-shaped web profile steel 2 and is parallel to the length direction of the beam. Specifically, the rectangular hollow inner die 5 is disposed between two webs. Illustratively, the rectangular hollow inner mold 5 may be a composite rubber inner mold, a foam inner mold, or a polystyrene core mold.
And the closed stirrups 6 are arranged around the hollow II-shaped web profile steel 2 and wrap the longitudinal ribs I3 and the longitudinal ribs II 4. Illustratively, the closure stirrups 6 are equally spaced. And the closed hoop reinforcement 6, the longitudinal reinforcement I3 and the longitudinal reinforcement II 4 are fixed in a welding mode.
And the concrete shell 1-1 is poured outside the hollow II-shaped web profile steel 2 to form the overall appearance of the composite beam. Illustratively, the concrete shell 1-1 is made of ultra-high performance concrete
And (3) pouring concrete inner shells 1-2 between the rectangular hollow inner mold 5 and the hollow II-shaped web profile steel 2. Illustratively, the concrete inner shell 1-2 is made of ordinary concrete or lightweight aggregate concrete.
Wherein:
1. the concrete shell 1-1 poured in the outer die is made of ultra-high performance concrete, so that the bearing capacity and the durability of the double-corrugated hollow web type steel concrete beam can be improved, the deflection deformation is reduced, and the cracking is effectively reduced. And the ultrahigh-performance concrete wraps the section steel web plate, so that the buckling of the web plate can be effectively prevented.
2. The trapezoidal corrugated web plate enhances the bending resistance bearing capacity of the composite beam and the shearing resistance bearing capacity of the web plate, greatly reduces the steel consumption and reduces the manufacturing cost.
3. The design parameters related to the strength, the material, the form and the like of the double-corrugated hollow web section steel can be optimally designed according to a corresponding design calculation method.
The concrete construction method of the invention comprises the following steps:
in a factory, two steel plates and two corrugated webs are welded to form hollow II-shaped web section steel 2, the webs are symmetrically arranged by adopting trapezoidal corrugations, a rectangular hollow inner die 5 is fixed inside the hollow II-shaped web section steel 2, a closed stirrup 6 is wrapped outside a longitudinal rib I3 and a longitudinal rib II 4 according to a set interval to form a reinforcement cage, the closed stirrup 6, the longitudinal rib I3 and the longitudinal rib II 4 are fixed in a welding mode, the reinforcement cage and the hollow II-shaped web section steel 2 are fixed in an outer die, ultra-high-performance concrete is poured in the outer die to form a concrete outer shell 1-1, ordinary concrete or light aggregate concrete is poured in a gap between the rectangular hollow inner die and the hollow II-shaped web to form a concrete inner shell 1-2, and after the concrete outer shell 1-1 is cured, a template is removed to finish pouring of a beam. And finally, directly connecting the two ends of the hollow II-type web section steel 2, the longitudinal rib I3 and the longitudinal rib II 4 with a combined column or a steel column or transitionally connecting the two ends with a concrete column on site.
By combining corrugated web section steel in different forms and cast-in-place concrete in different types, various types of steel reinforced concrete composite beams can be optimally combined, and the steel reinforced concrete composite beams have the performance characteristics and advantages and are suitable for different engineering condition requirements.
On the basis of the traditional steel reinforced concrete beam, the invention adopts the design of the hollow II-shaped web plate and the rectangular hollow inner die, greatly reduces the steel consumption and the self weight of the beam, is convenient to transport, meets the on-site hoisting requirement, is simple to construct and is a good prefabricating method. According to the design method provided by the invention, the thickness, the material and the corrugation form of the corrugated web, the type of the concrete of the inner shell, the strength of the ultrahigh-performance concrete of the outer shell and other parameters can be further optimized, so that the optimized design of the embodiment is realized.
Claims (5)
1. The utility model provides a hollow II type web type steel-concrete composite beam of prefabricated assembled which characterized in that includes:
the hollow II-shaped web section steel (2) is formed by welding two steel plates and two corrugated webs;
the longitudinal rib I (3) is arranged at the bottom of the lower flange of the hollow II-shaped web section steel (2) and is parallel to the length direction of the beam;
a second longitudinal rib (4) which is arranged on the top of the upper flange of the hollow II-shaped web section steel (2) and is parallel to the length direction of the beam;
the rectangular hollow inner die (5) is arranged inside the hollow II-shaped web section steel (2) and is parallel to the length direction of the beam;
a plurality of closed stirrups (6) which are arranged around the hollow II-shaped web profile steel (2) and wrap the longitudinal rib I (3) and the longitudinal rib II (4);
and the number of the first and second groups,
a concrete outer shell (1-1) poured outside the hollow II-type web profile steel (2) and a concrete inner shell (1-2) poured between the rectangular hollow inner mold (5) and the hollow II-type web profile steel (2).
2. The prefabricated assembled hollow II-type web steel reinforced concrete composite beam as claimed in claim 1, wherein the web is symmetrically arranged by adopting trapezoidal corrugations.
3. The prefabricated assembled hollow II-type web type steel reinforced concrete composite beam as claimed in claim 1, wherein the closed stirrups (6), the first longitudinal bars (3) and the second longitudinal bars (4) are fixed in a welding manner; the closed stirrups (6) are arranged at equal intervals.
4. The prefabricated assembled hollow II-type web type steel reinforced concrete composite beam as claimed in claim 1, wherein the rectangular hollow inner mold (5) is a combined rubber inner mold, a foam inner mold or a polystyrene core mold.
5. The prefabricated assembled hollow II-type web type steel-concrete composite beam as claimed in claim 1, wherein the concrete shell (1-1) is made of ultra-high performance concrete; the concrete inner shell (1-2) is made of common concrete or lightweight aggregate concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121894114.7U CN215406916U (en) | 2021-08-13 | 2021-08-13 | Prefabricated hollow II type web type steel-concrete composite beam of assembled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121894114.7U CN215406916U (en) | 2021-08-13 | 2021-08-13 | Prefabricated hollow II type web type steel-concrete composite beam of assembled |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215406916U true CN215406916U (en) | 2022-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121894114.7U Active CN215406916U (en) | 2021-08-13 | 2021-08-13 | Prefabricated hollow II type web type steel-concrete composite beam of assembled |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215406916U (en) |
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2021
- 2021-08-13 CN CN202121894114.7U patent/CN215406916U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230614 Address after: 710000, Room A-134, 3rd Floor, Block F, Building BDEF, Airport International Business Center, Airport New City, Xixian New District, Xi'an City, Shaanxi Province Patentee after: Shaanxi Ruijunye Construction Engineering Co.,Ltd. Address before: 710055 No. 13, Yanta Road, Shaanxi, Xi'an Patentee before: XIAN University OF ARCHITECTURE AND TECHNOLOG |