CN109138269B - Combined beam structure and construction method thereof - Google Patents
Combined beam structure and construction method thereof Download PDFInfo
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- CN109138269B CN109138269B CN201811247565.4A CN201811247565A CN109138269B CN 109138269 B CN109138269 B CN 109138269B CN 201811247565 A CN201811247565 A CN 201811247565A CN 109138269 B CN109138269 B CN 109138269B
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- 238000010276 construction Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 162
- 239000010959 steel Substances 0.000 claims abstract description 162
- 239000002131 composite material Substances 0.000 claims abstract description 27
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000002301 combined effect Effects 0.000 abstract 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention relates to a composite beam structure and a construction method thereof, comprising the following steps: steel beams fixed on the side surfaces of the frame columns; a shear connector fixed to the top of the steel beam; concrete poured on the top of the steel beam; and the steel bars are arranged in the concrete and fixedly connected with the shearing-resistant connecting pieces, so that the concrete and the steel beams are fixedly connected. The invention utilizes the shearing connection piece to fixedly connect the steel beam with the steel bar in the concrete at the top of the steel beam, so that the steel beam and the concrete are fixedly connected, and the integral structure formed by connection can generate a combined effect, thereby increasing the bearing capacity of the integral structure, and solving the problems that the combined stress of the steel structure main beam and the concrete cannot be considered in the prior art, the bearing capacity of the structure is small, more steel structures are needed to be used for enabling the structure to have enough bearing capacity, the steel consumption is increased, and the manufacturing cost is increased.
Description
Technical Field
The invention relates to the field of building construction, in particular to a combined beam structure and a construction method thereof.
Background
In a typical frame beam structure, the main beams rest on the frame columns and the secondary beams rest on the main beams. The combined beam means that the steel beam and the concrete are combined to bear force.
In the existing steel structure building, the bearing capacity of the concrete in tension is very low, so that the combined beam is generally used in the secondary beam, and the concrete part is pressed without problems because the secondary beam only generates positive bending moment.
When the girder (or the girder with two ends just connected with the frame column) bears a hogging moment at the girder end and the concrete part is pulled, the mechanics principle under the condition is complex, so the design method is complex and the practical use is less.
Under the condition, the combined stress of the steel structure girder and the concrete cannot be considered, and the concrete is an anisotropic material, so that the tensile capacity is poor, the stress capacity is strong, the bearing capacity of the structure is small, more steel structures are needed to be used for enabling the structure to have enough bearing capacity, and the steel consumption is increased, so that the cost is increased. And in addition, the floor slab is arranged on the steel beam, so that the thickness of the steel structure is larger, and the advantage of small section thickness of the steel beam is lost. In the existing frame combination beam design, the steel bars in the concrete at the upper part of the steel beam are considered to be stressed, but the steel bars are broken by the steel columns at the positions of the steel columns, so that the effect of being used as tension steel bars is lost.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a combined beam structure which solves the problems that the combined stress of a steel beam and concrete is difficult to consider in the prior art, and the steel consumption is increased and the manufacturing cost is increased because the concrete is an anisotropic material, has poor tensile capacity, strong compressive capacity and small bearing capacity of the structure, so that the structure has enough bearing capacity, and more steel structures are needed.
The technical scheme for achieving the purpose is as follows:
the invention provides a composite beam structure and a construction method thereof, comprising the following steps:
steel beams fixed on the side surfaces of the frame columns;
A shear connector secured to the top of the steel beam;
Concrete poured on the top of the steel beam; and
The steel bars are arranged in the concrete and fixedly connected with the shearing-resistant connecting pieces, so that the concrete and the steel beams are fixedly connected.
A further improvement of the composite beam structure of the present invention is that the shear connector comprises:
A shear plate transversely secured to the top of the steel beam; and
And the studs are vertically fixed on the shear plate and are fixedly connected with the reinforcing steel bars.
The invention further improves the composite beam structure, wherein the steel bar comprises:
The ring rib is arranged in the concrete and surrounds and is fixed on the frame column; and
The outer rib is arranged in the concrete, arranged along the length direction of the steel beam and partially attached to the side face of the frame column, and the outer rib is fixedly connected with the ring rib.
The combined beam structure is further improved in that the steel bars further comprise inner side ribs which are arranged in the concrete and are arranged along the length direction of the steel beam, and the end parts of the inner side ribs are fixedly connected with the outer side ribs.
The combined beam structure is further improved in that a plurality of steel beams are arranged, and the steel beams are transversely welded and fixed on the corresponding side surfaces of the frame columns.
The invention also provides a construction method of the composite beam structure, which comprises the following steps:
Providing a steel beam and a frame column, and fixing the steel beam on the side surface of the frame column;
Providing a shear connector, and fixing the shear connector at the top of the steel beam;
Providing a reinforcing steel bar, binding the reinforcing steel bar on the steel beam, and fixedly connecting the reinforcing steel bar with the shearing-resistant connecting piece; and
And pouring concrete at the top of the steel beam, wherein the steel bars are fixed in the concrete, so that the concrete and the steel beam are fixedly connected.
The invention further improves the construction method of the composite beam structure, which comprises the following steps:
Providing a shear plate, and transversely fixing the shear plate on the top of the steel beam; and
Providing a plurality of pegs, vertically fixing the pegs to the shear plate, and fixedly connecting the pegs with the reinforcing steel bars.
The construction method of the composite beam structure of the invention is further improved in that the providing of the reinforcing steel bars comprises the following steps:
Providing a ring rib, encircling and fixing the ring rib on the frame column, and arranging the ring rib in the concrete at the top of the steel beam;
Providing an outer rib, arranging the outer rib in the concrete at the top of the steel beam, arranging the outer rib along the length direction of the steel beam, and separately attaching the outer rib to the side surface of the frame column; and
And fixedly connecting the outer rib with the annular rib. The ring rib is used for transmitting the internal force of the inner steel bar, and the outer steel bar can pass through the post to pass through.
The construction method of the composite beam structure is further improved in that the reinforcement further comprises an inner reinforcement, the inner reinforcement is arranged in the concrete and along the length direction of the steel beam, and the end part of the inner reinforcement is fixedly connected with the outer reinforcement.
The construction method of the combined beam structure is further improved in that a plurality of steel beams are adopted, and the steel beams are transversely welded and fixed on the corresponding side surfaces of the frame columns.
The combined beam structure and the construction method thereof have the beneficial effects that:
According to the invention, the steel beam is fixed on the side face of the frame column, the shearing-resistant connecting piece is fixed on the top of the steel beam, and concrete is poured on the top of the steel beam, so that the steel bars in the concrete and the steel beam are connected through the concrete to realize common stress. The steel beam and the steel bar can bear tensile force together through the bond strength of the shearing-resistant connecting piece and the concrete, so that the section bearing capacity of the steel beam is greatly improved, and the problems that in the prior art, the steel beam and the concrete are not considered in combination and the bearing capacity is poor, the bearing capacity of the structure is strong, the bearing capacity of the structure is small, more steel structures are needed to be used for enabling the structure to have enough bearing capacity, the steel consumption is increased, and the manufacturing cost is increased are solved.
Drawings
Fig. 1 is a transverse cross-sectional view of a composite beam structure of the present invention.
Fig. 2 is a longitudinal cross-sectional view of the composite girder structure of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
Referring to fig. 1, a transverse cross-sectional view of the composite beam structure of the present invention is shown. Fig. 2 is a longitudinal cross-sectional view of the composite girder structure of the present invention. As shown in connection with fig. 1 and 2, the composite girder structure of the present invention includes:
steel beams 20 fixed to the sides of the frame columns 10;
a shear connector fixed to the top of the steel beam 20;
Concrete 30 poured on top of the steel beam 20; and
And the steel bars 40 are arranged in the concrete 30, so that the steel bars 40 and the steel beams 20 are connected through the concrete 30 to realize common stress.
According to the invention, the steel beam is fixed on the side face of the frame column, the shearing-resistant connecting piece is fixed on the top of the steel beam, and concrete is poured on the top of the steel beam, so that the steel bar in the concrete is connected with the steel beam through the concrete, and the joint stress is realized. Specifically, through the bond strength of shearing connector and concrete, girder steel and reinforcing bar can bear the pulling force jointly to the cross-section bearing capacity of girder steel improves by a wide margin.
As a preferred embodiment of the composite girder structure of the present invention, as shown in connection with fig. 1 and 2, the shear connectors are shear plates transversely fixed to the top of the steel girder 20. The steel girders are joined to the reinforcing bars 20 by using shear plates. Or in another embodiment, the shear connectors are a plurality of studs vertically fixed to the top of the steel beam 20, the studs being connected to the concrete grip. The shear capacity is the limit capacity of building to resist shear damage, and its value is equal to the sliding shear stress during shear damage. Shear resistance refers to the ability of a material to resist external forces acting equally and oppositely along a particular cross-section, with lines of action of the forces being closely spaced. The stability of the structure is enhanced by the shear plates enhancing the resistance of the structure to shear failure.
As a preferred embodiment of the composite girder structure of the present invention, as shown in fig. 1, a large number of reinforcing bars 40 are disposed in concrete 30. Concrete is an anisotropic material with poor tension capacity and strong compression capacity. The steel bar is an isotropic material with high tensile strength, so that the bearing capacity of the structure can be increased.
In this embodiment, the reinforcing bar 40 includes: ring ribs 41 provided in the concrete 30 and surrounding the frame column 10; and an outer rib 42 provided in the concrete 30 and provided on a side surface of the frame column 10 along the longitudinal direction of the steel beam 20, the outer rib 42 being fixedly connected to the ring rib 41.
The ring rib 41 is arranged at the joint of the steel beam 20 and the frame column 10, and the ring rib 41 is wound on the frame column 10, so that the positive bending moment of the steel beam 20 at one side of the frame column 10 can be transmitted into the steel bars 40 opposite to the frame column 10 through the joint area formed by the ring rib 41. The number and the size of the ring ribs 41 are determined according to actual needs. The ring rib 41 has a circular structure formed by bending steel bars.
According to the invention, the ring ribs are wound on the frame columns, and the tension forces on the two opposite sides of the frame columns are balanced by the ring ribs, so that the problem that the tension forces on the two opposite sides of the frame columns cannot be continuous due to unbalanced tension forces on the two opposite sides of the frame columns when the steel bars are tensioned in the prior art is solved.
The reinforcing bars 40 further include inner ribs 43 disposed in the concrete 30 and along the length direction of the steel beam 20, and the ends of the inner ribs 43 are fixedly connected with the outer ribs 42, so that the plurality of reinforcing bars 40 are connected together to enhance the stability and firmness of the structure.
As a preferred embodiment of the composite girder structure of the present invention, the number of steel girders 20 is plural, and the steel girders 20 are transversely welded and fixed to the corresponding sides of the frame columns 10. The ends of the steel beams 20 are rigidly connected to the frame columns 10, and the ends of the steel beams 20 are subjected to a negative bending moment.
In this embodiment, the steel beam 20 is an H-beam, and the upper flange of the H-beam near the edge of the frame column 10 is pulled and the lower flange of the H-beam is pressed when the H-beam is loaded. Therefore, the steel bars are arranged on the upper flange of the H-shaped steel beam, and the upper flange of the H-shaped steel beam and the steel bars bear tensile force together through the bond strength of the shear connector and the concrete, so that the bearing capacity of the section is greatly improved.
The invention also provides a construction method of the composite beam structure, which comprises the following steps:
providing a steel beam 20 and a frame column 10, and fixing the steel beam 20 to the side surface of the frame column 10;
providing a shear connector, and fixing the shear connector to the top of the steel beam 20;
providing a steel bar 40, pouring concrete 30 on the top of the steel beam 20, and arranging the steel bar 40 in the concrete 30, so that the steel bar 40 and the steel beam 20 are connected through the concrete 30 to realize common stress.
As a preferred embodiment of the composite beam structure of the present invention, shear connectors are provided to provide shear plates that are laterally secured to the top of the steel beam 20.
Or in another embodiment, the shear connector is provided with a plurality of pegs, the pegs are vertically fixed on the top of the steel beam 20, and the pegs are connected with the concrete bond, so that the firmness and bearing capacity of the whole structure are enhanced.
As a preferred embodiment of the composite girder structure of the present invention, the provision of the reinforcing bars 40 includes: providing a ring rib 41, surrounding the ring rib 41 on the frame column 10 and arranging the ring rib 41 in the concrete 30 at the top of the steel beam 20; providing outer ribs 42, wherein the outer ribs 42 are arranged in the concrete 30 at the top of the steel beam 20 and are arranged on the side surface of the frame column 10 along the length direction of the steel beam 20; and fixedly connecting the outer rib 42 and the ring rib 41.
As a preferred embodiment of the composite girder structure of the present invention, providing the reinforcing bars 40 further includes providing inner side ribs 43, disposing the inner side ribs 43 in the concrete 30 and along the length direction of the steel girder 20, and fixedly connecting the ends of the inner side ribs 43 with the outer side ribs 42. According to the invention, a large number of steel bars 40 are arranged in the concrete 30, and after the steel bars are integrated with the steel beam 20, the moment of inertia of the steel beam 20 is greatly improved, so that the bearing capacity of the steel beam 20 is improved, the steel consumption and the manufacturing cost are reduced, and the required height of the steel beam 20 is reduced, so that the space is saved, and the subsequent structure is convenient to set.
As a preferred embodiment of the composite girder structure of the present invention, the number of steel girders 20 is plural, and the steel girders 20 are transversely welded and fixed to the corresponding sides of the frame columns 10. The steel beam 20 and the frame column 10 are rigidly connected.
The combined beam structure and the construction method thereof have the beneficial effects that:
According to the invention, the steel beam is fixed on the side face of the frame column, the shearing-resistant connecting piece is fixed on the top of the steel beam, and concrete is poured on the top of the steel beam, so that the steel bars in the concrete and the steel beam are connected through the concrete to realize common stress. The steel beam and the steel bar can bear tensile force together through the bond strength of the shearing-resistant connecting piece and the concrete, so that the section bearing capacity of the steel beam is greatly improved, and the problems that in the prior art, the steel beam and the concrete are not considered in combination and the bearing capacity is poor, the bearing capacity of the structure is strong, the bearing capacity of the structure is small, more steel structures are needed to be used for enabling the structure to have enough bearing capacity, the steel consumption is increased, and the manufacturing cost is increased are solved.
According to the invention, the ring ribs are wound on the frame columns, and the tension forces on the two opposite sides of the frame columns are balanced by the ring ribs, so that the problem that the tension forces on the two opposite sides of the frame columns cannot be continuous due to unbalanced tension forces on the two opposite sides of the frame columns when the steel bars are tensioned in the prior art is solved.
The present invention has been described in detail with reference to the embodiments of the drawings, and those skilled in the art can make various modifications to the invention based on the above description. Accordingly, certain details of the illustrated embodiments are not to be taken as limiting the invention, which is defined by the appended claims.
Claims (6)
1. A composite beam structure, comprising:
steel beams fixed on the side surfaces of the frame columns;
A shear connector secured to the top of the steel beam;
Concrete poured on the top of the steel beam; and
The steel bars are arranged in the concrete, so that the steel bars and the steel beams are connected through the concrete to realize common stress; wherein, the reinforcing bar includes:
the ring rib is arranged in the concrete and surrounds the frame column; and
The outer side ribs are arranged in the concrete and on the side face of the frame column along the length direction of the steel beam, and the outer side ribs are fixedly connected with the ring ribs;
The steel bar further comprises an inner side rib which is arranged in the concrete and along the length direction of the steel beam, and the end part of the inner side rib is fixedly connected with the outer side rib.
2. The composite beam structure according to claim 1, wherein the shear connectors are shear plates laterally secured to the top of the steel beams.
3. The composite girder construction according to claim 1, wherein the shear connectors are a plurality of pegs vertically fixed to the top of the girder steel, the pegs being connected with the concrete grip.
4. The construction method of the composite beam structure is characterized by comprising the following steps of:
Providing a steel beam and a frame column, and fixing the steel beam on the side surface of the frame column;
Providing a shear connector, and fixing the shear connector at the top of the steel beam; and
Providing a steel bar, pouring concrete at the top of the steel beam, and arranging the steel bar in the concrete, so that the steel bar and the steel beam are connected through the concrete to realize common stress; wherein, providing the rebar comprises:
Providing a ring rib, surrounding the ring rib on the frame column and arranging the ring rib in the concrete at the top of the steel beam;
Providing an outer rib, wherein the outer rib is arranged in the concrete at the top of the steel beam and is arranged on the side surface of the frame column along the length direction of the steel beam;
Providing an inner rib, arranging the inner rib in the concrete and along the length direction of the steel beam, and fixedly connecting the end part of the inner rib with the outer rib; and
And fixedly connecting the outer rib with the annular rib.
5. The method of constructing a composite beam structure according to claim 4, wherein providing shear connectors provides shear plates that are laterally secured to the top of the steel beam.
6. The method for constructing a composite beam structure according to claim 4, wherein,
Providing a shear connector to provide a plurality of pegs, vertically fixing the pegs to the top of the steel beam, and connecting the pegs with the concrete bond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811247565.4A CN109138269B (en) | 2018-10-25 | 2018-10-25 | Combined beam structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811247565.4A CN109138269B (en) | 2018-10-25 | 2018-10-25 | Combined beam structure and construction method thereof |
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| CN109138269A CN109138269A (en) | 2019-01-04 |
| CN109138269B true CN109138269B (en) | 2024-06-07 |
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| CN115324201A (en) * | 2022-08-17 | 2022-11-11 | 中建一局集团建设发展有限公司 | Steel structure beam column and concrete ring beam combined system and construction method thereof |
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| CN109138269A (en) | 2019-01-04 |
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