CN114892888A - Section steel-partially filled concrete composite beam and construction method thereof - Google Patents
Section steel-partially filled concrete composite beam and construction method thereof Download PDFInfo
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- CN114892888A CN114892888A CN202210560755.1A CN202210560755A CN114892888A CN 114892888 A CN114892888 A CN 114892888A CN 202210560755 A CN202210560755 A CN 202210560755A CN 114892888 A CN114892888 A CN 114892888A
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- 239000004567 concrete Substances 0.000 title claims abstract description 106
- 239000002131 composite material Substances 0.000 title claims abstract description 53
- 238000010276 construction Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 194
- 239000010959 steel Substances 0.000 claims abstract description 194
- 238000005192 partition Methods 0.000 claims abstract description 21
- 238000003466 welding Methods 0.000 claims description 20
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 239000011381 foam concrete Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 8
- 238000005452 bending Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 3
- 239000003351 stiffener Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
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- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a section steel-partially filled concrete composite beam and a construction method thereof. The combined beam comprises a filling section, wherein both ends of the filling section are connected with a non-filling section, and the filling section comprises first section steel and filled concrete; the first section steel comprises a first upper flange steel plate, a first web steel plate and a first lower flange steel plate which are sequentially connected, two ends of the first section steel are connected with a partition plate, and concrete is poured into a space surrounded by the first upper flange steel plate, the first web steel plate, the first lower flange steel plate and the partition plate. Compared with the traditional steel beam, the section steel-partially filled concrete composite beam has the advantages that the section steel is filled with concrete, the vertical rigidity of the composite beam is improved, and the floor has higher comfort level under the load of people. Provide the three-dimensional restraint for the concrete through first shaped steel, the resistance to compression bearing capacity of concrete is showing and is improving, and the concrete provides the off-plate restraint for first shaped steel spare, prevents that first shaped steel from taking place local buckling.
Description
Technical Field
The invention relates to a section steel-partially filled concrete composite beam and a construction method thereof, belonging to the technical field of building construction.
Background
The profile steel-concrete combined beam is a common form of the steel-concrete combined beam and is characterized in that concrete is filled in profile steel, a profile steel plate is not easy to bend, the concrete is in a three-dimensional stress state under the constraint of the profile steel, and the compression-resistant bearing capacity is improved. Therefore, the combination of the section steel and the concrete can effectively improve the bearing capacity, the ductility and the seismic capacity of the structural beam, and the structural beam is widely used in super high-rise and large-span building structures.
The assembly type technology is a construction technology that structural members are prefabricated in a factory and spliced and installed on site, has the advantages of high construction speed, high construction quality, less building pollution and the like, and is widely popularized in China in recent years.
However, the connection joints between the section steel-concrete composite beam and the concrete column or the steel column are complicated, and when the fabricated design or construction quality does not meet the standard, the structural integrity is poor, the design principle of 'strong joints and weak members' is difficult to realize, and the advantages of the section steel-concrete composite beam cannot be fully exerted.
Under the action of earthquake, the bending moment of the frame beam is in antisymmetric distribution, the bending moment of two ends is far greater than the bending moment of a midspan, and the whole frame beam is uneconomical to be made into a single section. The beam end section steel-concrete combined section has high strength, and if the strength or stability of the column section is insufficient, a yield mechanism of a beam hinge is difficult to form, so that the ductility of the structure is reduced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the section steel-partially filled concrete composite beam and the construction method thereof, which not only exert the advantages of high bearing capacity and good anti-seismic performance of the section steel-concrete composite beam, but also effectively avoid the problem of complex connection of the section steel-concrete composite beam nodes and are beneficial to implementation of prefabrication and assembly.
The invention is realized by the following technical scheme:
a section steel-partially filled concrete composite beam comprises a filling section, wherein both ends of the filling section are connected with a non-filling section, and the filling section comprises first section steel and filled concrete; the first section steel comprises a first upper flange steel plate, a first web steel plate and a first lower flange steel plate which are sequentially connected, two ends of the first section steel are connected with a partition plate, and concrete is poured into a space surrounded by the first upper flange steel plate, the first web steel plate, the first lower flange steel plate and the partition plate.
The section steel-partially filled concrete combined beam is characterized in that shear-resistant studs are arranged on the inner surfaces of the first upper flange steel plate and the first lower flange steel plate and the surface of the first web steel plate.
The section steel-partially filled concrete combined beam is characterized in that one side of filled concrete is provided with a construction reinforcing mesh.
The section steel-partially filled concrete combined beam is constructed by a reinforcing mesh
6@150 bilayer arrangement.
According to the section steel-partially filled concrete combined beam, the section of the first section steel is preferably selected from S3-S5, out-of-plane buckling of the plate is restrained by filled concrete, the stability is good, and the material of the plate is preferably Q355 due to the fact that the thickness of the plate is thin.
The section steel-partially filled concrete combined beam is characterized in that the first web steel plate, the first upper flange steel plate and the first lower flange steel plate are connected in a welding mode.
The section steel-partially filled concrete combined beam is characterized in that the web steel plates are multiple, and the distance from the outer surface of the outermost web steel plate to the edge of the flange is not less than 100 mm. Two rows of shear-resistant studs are arranged on the outer surface of the first web steel plate on the outermost side, and the longitudinal distance between the shear-resistant studs is 200 mm.
According to the section steel-partially filled concrete combined beam, the filled concrete is foam concrete, so that the self weight of the structure is reduced.
According to the section steel-partially filled concrete combined beam, one side surface of the partition plate is flush with the edge of the first section steel of the filling section, and three sides of the partition plate are respectively connected with the first upper flange steel plate, the first lower flange steel plate and the surface of the first web steel plate on the outermost side in a welding mode. The separator material is preferably Q355.
The section steel-partially filled concrete combined beam is characterized in that the non-filling section comprises second section steel, and the second section steel comprises a second upper flange steel plate, a second web steel plate and a second lower flange steel plate which are sequentially connected.
The section steel-partially filled concrete combined beam is characterized in that stiffening ribs are arranged in the section of the second section steel. Three edges of the stiffening rib are respectively connected with the surfaces of the second upper flange steel plate, the second lower flange steel plate and the second web steel plate in a welding mode, and the distance between the stiffening ribs is 200 mm. The stiffener material is preferably Q355.
According to the section steel-partially filled concrete combined beam, the surfaces of the second upper flange steel plate and the second lower flange steel plate are weakened to form a dog-bone structure. The structure is easy to form a yield mechanism of 'beam hinge'.
The length of the non-filling section is 1 time of the height of the composite beam.
The section steel-partially filled concrete combined beam is preferably S1-S2 in section of the second section steel, and has high ductility under the action of cyclic reciprocation. The plate is thicker, and the material of the plate is preferably Q345 GJ.
The construction method of the section steel-partially filled concrete combined beam comprises the steps of firstly welding a first upper flange steel plate, a first web steel plate and a first lower flange steel plate to obtain first section steel, and welding partition plates at two ends of the first section steel; then pouring concrete into a space surrounded by the first upper flange steel plate, the first web steel plate, the first lower flange steel plate and the partition plate; and finally welding the non-filling section to two ends of the filling section to obtain the composite beam.
The construction method of the section steel-partially filled concrete composite beam comprises the concrete pouring steps of: and (3) one side of the first web steel plate faces upwards, concrete is poured in a space enclosed by the first upper flange steel plate, the first web steel plate, the first lower flange steel plate and the partition plate, after the foam concrete is solidified and hardened, the filling section is turned over to enable the other side of the first web steel plate to face upwards, and the concrete is poured by the same method.
According to the construction method of the section steel-partially filled concrete composite beam, the construction of the section steel-partially filled concrete composite beam is completed in a factory, and the prefabrication and assembly are realized.
A method for connecting a section steel-partially filled concrete composite beam and a structural column. The section steel-partially filled concrete composite beam is connected with the structural column through second section steel of the non-filled section. The connection mode can adopt welding, bolt connection or bolt welding combination connection and the like.
Under the action of vertical constant live load, the section steel-partially filled concrete combined beam is in an elastic working state, and the combined beam span is filled with concrete, so that the vertical rigidity of the combined beam span is far higher than that of a traditional steel beam, and the floor comfort level is better. When subjected to seismic action, the bending moment of the composite beam is mainly distributed at the beam ends. Because of adopting the dog-bone type structure, the beam end can quickly form a beam, and enters a yielding energy consumption state. The section of the non-filling section is S1-S2, the whole section plasticity can be achieved, the anti-seismic performance is strong, and the shear resistance and the local stability of the stiffening rib of the non-filling section can be further improved.
The invention achieves the following beneficial effects:
compared with the traditional steel beam, the section steel-partially filled concrete composite beam has the advantages that the section steel is filled with concrete, the vertical rigidity of the composite beam is improved, and the floor has higher comfort level under the load of people. Provide the three-dimensional restraint for the concrete through first shaped steel, the resistance to compression bearing capacity of concrete is showing and is improving, and the concrete provides the off-plate restraint for first shaped steel spare, prevents that first shaped steel from taking place local buckling. Meanwhile, the concrete material has better fire resistance, and the first section steel is filled with concrete, so that the defect of poor fire resistance of the steel beam can be overcome, and the fire resistance of the combined beam is improved.
According to the section steel-partially filled concrete composite beam, the first section steel is filled with the light foam concrete, so that the self weight of the composite beam is reduced, and the stress performance of the composite beam is not influenced. Set up shear-resistant stud in the first shaped steel, improved filled concrete and first shaped steel cohesiveness and shear-resistant ability. A reinforcing mesh is arranged in the filling concrete to prevent the surface concrete from peeling off.
According to the section steel-partially filled concrete composite beam, the end part of the section steel-partially filled concrete composite beam adopts the sections S1-S2, so that the full-section plasticity can be achieved, and the energy consumption capability of the composite beam under the action of an earthquake is improved. The stiffening ribs are arranged in the section steel at the end part of the composite beam, so that the out-of-plane deformation of the profiled steel sheet part is restrained, and the rotation ductility of the profiled steel sheet part is further improved. Meanwhile, the end part of the composite beam is made of the second section steel, and compared with the traditional section steel-concrete composite beam, the composite beam is simpler in connection structure and lower in construction difficulty. The end part of the composite beam adopts a dog-bone structure, and can quickly form a beam hinge under the action of an earthquake to form a yield mechanism of a strong column and a weak beam.
The section steel-partially filled concrete combined beam can be integrally prefabricated in a factory, and industrial production can be realized.
Drawings
FIG. 1 is a front view of embodiment 1.
Fig. 2 is a sectional view taken along line 1-1 of fig. 1.
Fig. 3 is a sectional view taken along line 2-2 of fig. 1.
Fig. 4 is a sectional view taken along line 3-3 of fig. 1.
FIG. 5 is a front view of embodiment 2.
Fig. 6 is a sectional view taken along line 1-1 of fig. 5.
Fig. 7 is a sectional view taken along line 2-2 of fig. 5.
Fig. 8 is a sectional view taken along line 3-3 of fig. 5.
In the figure: 1. a filling section; 2. a non-filled section; 3. a first section steel; 4. a first top flange steel plate; 5. a first lower flange steel plate; 6. a first web steel plate; 7. concrete; 8. a partition plate; 9. shear resistant studs; 10. constructing a reinforcing mesh; 11. a second section steel; 12. a second top flange steel plate; 13. a second lower flange steel plate; 14. a second web steel plate; 15. a stiffening rib.
Detailed Description
The invention is further described below. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
As shown in fig. 1-4.
The present embodiment provides a section steel-partially filled concrete composite girder. The composite beam comprises one filled section 1 and two unfilled sections 2. The filling section 1 comprises a first section steel 3, concrete 7, a separation plate 8, shear-resistant studs 9 and a construction rebar grid 10; the unfilled segment 2 comprises a second section steel 11 and a stiffener 15.
The first section steel 3 of the filling section 1 is composed of a first upper flange steel plate 4, a first lower flange steel plate 5 and a first web steel plate 6, wherein the first web steel plate 6 is one, and the section of the first section steel 3 is H-shaped. And the two ends of the first section steel 3 are provided with partition plates 8, and concrete 7 is poured in a space enclosed by the first upper flange steel plate 4, the first lower flange steel plate 5, the first web steel plate 6 and the partition plates 8. The inner surfaces of the first upper flange steel plate 4 and the first lower flange steel plate 5 and the surface of the first web steel plate 6 are provided with shear studs 9 for reliable connection of the concrete 7 and the first section steel 3. The side of the concrete 7 not contacted with the first section steel 3 is provided with a construction reinforcing mesh 10 to prevent the outer concrete from peeling off under vertical load or horizontal reciprocating load.
The second section steel 11 of the unfilled section 2 is composed of a second upper flange steel plate 12, a second lower flange steel plate 13 and a second web steel plate 14. The second section steel 11 is internally provided with stiffening ribs 15, so that the shearing resistance of the non-filling section 2 is improved, the buckling of the plate is restrained, and the ductility under the reciprocating action of earthquakes and the like is improved.
In the embodiment, the first section steel 3 of the filling section 1 is S3-S5 in cross section, the out-of-plane buckling of the plate is restrained by the concrete 7, and the stability is good. Due to the thin thickness of the plate, the material is Q355.
In this embodiment, the first web steel plate 6 of the filling section 1 is connected with the first upper flange steel plate 4 and the first lower flange steel plate 5 by welding.
In this embodiment, a row of shear studs 9 is disposed on the inner surface of the overhanging sections of the first upper flange steel plate 4 and the first lower flange steel plate 5, and two rows of shear studs 9 are disposed on the outer surface of the first web steel plate, wherein the longitudinal distance between the shear studs 9 is 200 mm.
In this embodiment, the filled concrete 7 is foam concrete, which reduces the dead weight of the structure.
In this embodiment, the reinforcing mat 10 is constructed as
6@150, the distance from the edge of the constructional reinforcing mesh 10 to the surface of the filling concrete 7 (thickness of the protective layer) is 35mm, and the constructional reinforcing mesh 10 is welded with the section steel I3.
In this embodiment, one side surface of the partition plate 8 is flush with the edge of the first section steel 3 of the filling section 1, and three sides of the partition plate are respectively connected with the surfaces of the first upper flange steel plate 4, the first lower flange steel plate 5 and the first web steel plate 6 in a welding manner. The material of the partition plate 8 is Q355.
In the embodiment, the second type steel 11 of the unfilled section 2 has a cross section of S1-S2, and has a high ductility under the action of cyclic reciprocation. The plate is thicker and is made of Q345 GJ.
In this embodiment, the second web steel plate 14 is connected to the second top flange steel plate 12 and the second bottom flange steel plate 13 by welding.
In this embodiment, the unfilled sections 2 are 1 beam height in length.
In the embodiment, the second section steel 11 is consistent with the first section steel 3 in cross-sectional shape, only the thickness of the plate is different, and the second section steel 11 is connected with the first section steel 3 in a welding butt joint mode.
In this embodiment, three sides of the stiffening rib 15 are welded to the surfaces of the second top flange steel plate 12, the second bottom flange steel plate 13 and the second web steel plate 14, respectively, and the spacing between the stiffening ribs 14 is 200 mm. The stiffener 14 material is Q355.
In the embodiment, the second upper flange steel plate 12 and the second lower flange steel plate 13 of the non-filling section 2 are weakened to form a dog-bone-shaped structure, and the structure is easy to form a yield mechanism of a beam hinge.
The embodiment provides a construction method of a section steel-partially filled concrete composite beam. First, welding a first upper flange steel plate 4, a first lower flange steel plate 5 and a first web steel plate 6 of the filling section 1 to form first section steel 3. The two ends of the first section steel 3 are welded with a separation plate 8, and the surfaces of the first upper flange steel plate 4, the first lower flange steel plate 5 and the first web steel plate 6 are welded with shear studs 9. And (3) one side of the first web steel plate 6 faces upwards, concrete 7 is poured in a space enclosed by the first upper flange steel plate 4, the first lower flange steel plate 5, the first web steel plate 6 and the partition plate 8, after the concrete 7 is solidified and hardened, the filling section 1 is turned over to enable the other side to face upwards, and the concrete 7 is poured by the same method. And then welding 14 the second upper flange steel plate 12, the second lower flange steel plate 13 and the second web steel plate of the unfilled section 2 to form a second type steel 11, and welding and installing a stiffening rib 15. And finally, welding and connecting the non-filling section 2 to the two ends of the filling section 1 to obtain the complete section steel-partially filled concrete composite beam.
In this embodiment, the construction of the section steel-partially filled concrete composite beam is completed in a factory, and the prefabrication and assembly are realized.
In this embodiment, the section steel-partially filled concrete composite beam is connected to the structural column by the second section steel 11 of the non-filled section 2. The connection mode can adopt welding, bolt connection or bolt welding combination connection and the like.
Example 2
As shown in fig. 5-8.
The present embodiment provides a section steel-partially filled concrete composite girder. Different from the first embodiment, the number of the first web steel plates 6 is two, the section of the first section steel 3 is a box-shaped section with an external extending flange, and the distance between the outer surface of the first web steel plate 6 and the edge of the first upper flange steel plate 4 and the first lower flange steel plate 5 is not less than 100 mm.
The working principle of the invention is as follows:
under the action of vertical constant live load, the section steel-partially filled concrete combined beam is in an elastic working state, and the combined beam span is filled with concrete 7, so that the vertical rigidity of the combined beam span is far higher than that of a traditional steel beam, and the floor comfort level is better. When subjected to seismic action, the bending moment of the composite beam is mainly distributed at the beam ends. Because the non-filling section 2 adopts a dog-bone structure, the beam end can quickly form a beam, and enters a yield energy consumption state. The section S1-S2 is selected as the non-filling section 2, the whole section plasticity can be achieved, the anti-seismic performance is strong, and the shear resistance and the local stability of the stiffening rib 15 of the non-filling section 2 can be further improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A section steel-partially filled concrete composite beam is characterized by comprising a filling section, wherein both ends of the filling section are connected with a non-filling section, and the filling section comprises first section steel and filled concrete; the first section steel comprises a first upper flange steel plate, a first web steel plate and a first lower flange steel plate which are sequentially connected, two ends of the first section steel are connected with a partition plate, and concrete is poured into a space surrounded by the first upper flange steel plate, the first web steel plate, the first lower flange steel plate and the partition plate.
2. A section steel-partially filled concrete composite girder according to claim 1, wherein the inner surfaces of the first upper flange steel plate, the first lower flange steel plate and the surface of the first web steel plate are provided with shear studs.
3. A section steel-partially filled concrete composite beam as claimed in claim 1, wherein a construction rebar grid is provided on one side of said filled concrete.
4. A section steel-partially filled concrete composite beam as claimed in claim 3, wherein the reinforcing mesh is constructed as
6@150 bilayer arrangement.
5. A section steel-partially filled concrete composite beam as claimed in claim 1, wherein said non-filled section comprises a second section steel, said second section steel comprising a second upper flange steel plate, a second web steel plate and a second lower flange steel plate which are connected in sequence.
6. A section steel-partially filled concrete composite beam according to claim 5, wherein a section of said second section steel is provided with a stiffening rib.
7. A section steel-partially filled concrete composite beam as claimed in claim 5 or 6, wherein the surfaces of the second upper flange steel plate and the second lower flange steel plate are weakened to form a dog-bone type structure.
8. A section steel-partially filled concrete composite beam according to claim 1, wherein the length of said non-filled section is 1 times the height of the composite beam.
9. A construction method of a section steel-partially filled concrete composite beam according to any one of claims 1 to 8, wherein first section steel is obtained by welding a first upper flange steel plate, a first web steel plate and a first lower flange steel plate, and partition plates are welded to both ends of the first section steel; then pouring concrete into a space surrounded by the first upper flange steel plate, the first web steel plate, the first lower flange steel plate and the partition plate; and finally welding the non-filling section to two ends of the filling section to obtain the composite beam.
10. The construction method of a section steel-partially filled concrete composite beam according to claim 9, wherein the concrete is cast by the concrete steps of: and (3) one side of the first web steel plate faces upwards, concrete is poured in a space enclosed by the first upper flange steel plate, the first web steel plate, the first lower flange steel plate and the partition plate, after the foam concrete is solidified and hardened, the filling section is turned over to enable the other side of the first web steel plate to face upwards, and the concrete is poured by the same method.
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| CN202210560755.1A CN114892888A (en) | 2022-05-23 | 2022-05-23 | Section steel-partially filled concrete composite beam and construction method thereof |
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| CN202210560755.1A CN114892888A (en) | 2022-05-23 | 2022-05-23 | Section steel-partially filled concrete composite beam and construction method thereof |
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2022
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| CN201148592Y (en) * | 2008-01-03 | 2008-11-12 | 长安大学 | Circular steel tube concrete wing edge combination beam |
| CN104251037A (en) * | 2013-06-29 | 2014-12-31 | 清华大学 | Steel-encased concrete-steel beam composite coupling beam and construction method thereof |
| KR101456391B1 (en) * | 2013-09-10 | 2014-11-03 | 주식회사 디알비동일 | Formed steel beam with holes and structure of composite floor |
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