CN113684956A - Novel combined secondary beam - Google Patents
Novel combined secondary beam Download PDFInfo
- Publication number
- CN113684956A CN113684956A CN202111126320.8A CN202111126320A CN113684956A CN 113684956 A CN113684956 A CN 113684956A CN 202111126320 A CN202111126320 A CN 202111126320A CN 113684956 A CN113684956 A CN 113684956A
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- Prior art keywords
- flange plate
- concrete
- width
- plate
- bottom flange
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- 239000004567 concrete Substances 0.000 claims abstract description 62
- 229910000831 Steel Inorganic materials 0.000 claims description 35
- 239000010959 steel Substances 0.000 claims description 35
- 239000002131 composite material Substances 0.000 claims description 13
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 238000005336 cracking Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 238000005536 corrosion prevention Methods 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 239000003973 paint Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4157—Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
-
- 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
Abstract
The invention provides a novel combined secondary beam, which comprises a concrete floor slab 2 and a structural beam body; the structural beam body comprises a top flange plate 17, a beam web plate 11, a bottom flange plate 12 and at least one tie piece 14, wherein the tie piece 14 is embedded in the concrete floor slab 2 and forms a tie integral structure with the concrete floor slab 2; the plate width of the top flange plate 17 is not larger than that of the bottom flange plate 12, structural beam body concrete 16 is precast on two sides of the beam web plate 11 in a factory, the top surface of the concrete structure is flush with the top surface of the top flange plate 17, and the width of the concrete structure is at least larger than that of the bottom flange plate 17. According to the invention, the width of the top flange plate 17 of the structural beam body is relatively reduced, and the main top flange plate 17 can be wrapped by concrete to play a role in corrosion prevention.
Description
Technical Field
The invention relates to a steel-concrete building structure, in particular to a novel combined secondary beam.
Background
The H-shaped steel secondary beam is currently used in steel structure buildings such as houses and office buildings, the floor secondary beam is generally made of H-shaped steel, but the H-shaped steel secondary beam has the following defects:
1) the secondary beam uses a large amount of steel, and the amount of steel used per square meter is generally more than 10 kilograms;
2) the secondary beam needs to be subjected to anti-corrosion coating and fireproof treatment, the process is troublesome, and the manufacturing cost is high;
3) if there is a partition wall at the bottom of the secondary beam, the side of the secondary beam needs to be filled and finished in order to improve the sound insulation capability and improve the visual effect.
4) The secondary beam has small rigidity during installation and is easy to deflect downwards
Disclosure of Invention
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
The invention mainly solves the technical problems of reducing the steel consumption of H-shaped steel used by a secondary beam in a traditional steel-concrete structure, improving the strength and rigidity of the whole structure, and reducing the workload and cost of on-site painting and fire prevention of a conventional steel beam. Therefore, the application provides a novel combination secondary beam, its characterized in that includes:
a concrete floor slab;
the structural beam body comprises a top flange plate, a beam web plate, a bottom flange plate and at least one tie piece, and the tie piece is embedded in the concrete floor slab and forms a tie integral structure with the concrete floor slab; the plate width of the top flange plate is not larger than that of the bottom flange plate, structural beam body concrete is pre-cast on two sides of the beam web, the top surface of the concrete structure is flush with the top surface of the top flange plate, and the width of the concrete structure is at least larger than that of the bottom flange plate.
The invention has the beneficial effects that:
according to the invention, the width of the flange plate at the top of the structural beam body is relatively reduced, and the upper flange and the web plate of the steel beam are completely wrapped by the concrete, so that the thickness of the web plate is reduced, the steel consumption is reduced, and the outer wrapping concrete can play the anti-corrosion and fireproof protection roles on the steel beam.
As a preferred embodiment of this embodiment, the width of the concrete structure is at least 10mm larger than the plate width of the bottom flange plate.
As a preferred embodiment of this embodiment, a steel wire mesh for preventing cracking is disposed in the concrete of the structural beam body.
As a preferred embodiment of this embodiment, the bottom flange plate is provided with a structural reinforcing rib along the length direction.
As a preferred embodiment of this embodiment, the number of the structural reinforcing ribs is at least two, and the two structural reinforcing ribs are respectively located at two sides of the web plate. The reinforcing ribs are in discontinuous welding connection with the lower flange of the steel beam.
As a preferred embodiment of this embodiment, the structural reinforcing rib is disposed at a central position in the length direction of the bottom flange plate.
As a preferred embodiment of this embodiment, the width of the concrete structure is greater than the plate width of the top flange plate.
As a preferred embodiment of this embodiment, the lower surface of the concrete structure is flush with the upper surface of the bottom flange plate.
As a preferred embodiment of this embodiment, the two ends of the web plate are provided with mounting lugs, and the mounting lugs are provided with mounting holes.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Detailed Description
The following description is presented to enable any person skilled in the art to make and use the invention and is incorporated in the context of a particular application. Various modifications, as well as various uses in different applications will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to a wide range of embodiments. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
In the following detailed description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the practice of the invention may not necessarily be limited to these specific details. In other instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present invention.
The reader's attention is directed to all papers and documents which are filed concurrently with this specification and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference. All the features disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
Note that where used, the designations left, right, front, back, top, bottom, positive, negative, clockwise, and counterclockwise are used for convenience only and do not imply any particular fixed orientation. In fact, they are used to reflect the relative position and/or orientation between the various parts of the object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is noted that, where used, further, preferably, still further and more preferably is a brief introduction to the exposition of the alternative embodiment on the basis of the preceding embodiment, the contents of the further, preferably, still further or more preferably back band being combined with the preceding embodiment as a complete constituent of the alternative embodiment. Several further, preferred, still further or more preferred arrangements of the belt after the same embodiment may be combined in any combination to form a further embodiment.
The invention is described in detail below with reference to the figures and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be construed as imposing any limitation on the scope of the present invention.
The application provides a novel combined secondary beam, which comprises a concrete floor slab 2 and a structural beam body; wherein the content of the first and second substances,
the structural beam body comprises a top flange plate 17, a beam web plate 11, a bottom flange plate 12 and at least one tie piece 14, wherein the tie piece 14 is embedded in the concrete floor slab 2 and forms a tie integral structure with the concrete floor slab 2; the plate width of the top flange plate 17 is not larger than that of the bottom flange plate 12, structural beam body concrete 16 is precast on two sides of the beam web plate 11 in a factory, the top surface of the concrete structure is flush with the top surface of the top flange plate 17, and the width of the concrete structure is at least larger than that of the bottom flange plate 17. According to the invention, the width of the top flange plate 17 of the structural beam body is relatively reduced, and the main top flange plate 17 can be wrapped by concrete to play a role in corrosion prevention.
The beam web 11 is provided with a through hole 112, and the structural beam body concretes 16 on both sides of the beam web 11 penetrate through the through hole 112 to be connected to form a concrete structure, so that the structural beam body concretes 16 on both sides of the beam web 11 form a whole and are more stable.
Preferably, the structural beam body concrete 16 is ceramsite lightweight concrete, which can play a better fireproof role and reduce the self weight.
The tie member 14 serves as a bolt and is poured inside the concrete floor 2 to integrally connect the concrete floor 2 and the structural beam, and specifically, the tie member 14 comprises a bolt rod 141 and a bolt cap 142, the bolt rod 141 is vertically arranged on the top flange plate 17, and the bolt cap 142 is transversely arranged on the bolt rod 141. Further, the number of the tie members 14 is a plurality of the tie members 14 arranged at intervals, and the arrangement of the plurality of the tie members 14 enables the concrete floor 2 to be stably connected with the structural beam body. The bolt rod 141 and the bolt cap 142 have a T-shaped structure. Preferably, the pull element 14 is preferably a finished peg.
In order to prevent the concrete from cracking, a crack-proof steel wire mesh 13 is arranged in the structural beam body concrete 16. The steel mesh 13 is arranged between the top and bottom flange plates 17, 12 when arranged.
Further, the bottom flange plate 12 is provided with a structural reinforcing rib 15 along the length direction. The composite beam has the largest mid-span bending moment along the span direction, the two ends are 0, the positive stress on the bottom flange plate 12 is also the largest in the middle, and the two ends are the smallest, so that the structural reinforcing ribs 15 are only arranged in the middle of the composite beam within a certain range, and the steel consumption is saved.
Preferably, the number of the structural reinforcing ribs 15 is at least two, and the two structural reinforcing ribs 15 are respectively positioned at two sides of the web plate 11. Further, structural stiffeners 15 are welded to the bottom flange plate 12.
Further, as a preferred option, the length of the structural reinforcing rib 15 is 2/3 times the length of the bottom flange plate 12, and the structural reinforcing rib 15 is provided at a longitudinally intermediate position on the bottom flange plate 12.
The width of the concrete structure is greater than the slab width of the bottom flange plate 12. An L-shaped structural notch is formed between the bottom of the concrete structure and the bottom flange plate 12, so that the subsequent filling of the fireproof coating is facilitated, and the wall body can be prevented from cracking.
It should be noted that the width of the top flange plate 17 is not greater than the width of the bottom flange plate 12, including the width of the top flange plate 17 is equal to the width of the bottom flange plate 12; or the width of the top flange plate 17 is smaller than the width of the bottom flange plate 12. So design is firstly to guarantee that the concrete protective layer thickness of top flange board 17 department can reach the fire endurance of the structure roof beam body, because bottom flange board 12 is filled at the structure notch of L type with fire retardant coating, so protective layer thickness need not so big, secondly from the angle of atress, top flange board 17 has the help of concrete, does not need so wide to also can save the steel consumption.
Further, the two ends of the beam web 11 are provided with mounting ear plates 18, and the mounting ear plates 18 are provided with mounting holes 181. The mounting lug plate 18 can be bolted through the mounting hole 181 to the structural steel beam of the building body for easier installation.
Preferably, as shown in fig. 2, the two ends of the web 11 are provided with sealing plates 19, and when the structural beam concrete is precast and cast in a factory, the sealing plates 19 can be used as two-end casting templates for casting the structural beam concrete. And in the stress process of the composite beam, the sealing plate is beneficial to coordinating the deformation of the concrete and the steel beam.
Through the innovation, the beneficial effects of the invention are as follows:
1) saving cost, green and low carbon:
a. the cost of the anticorrosive paint and the fireproof coating is saved, and the cost is higher than that of the concrete on the newly added beam side. The upper sides of the upper flange, the web and the lower flange are completely wrapped by concrete, and fire-proof paint is not needed. A gap is left on the side surface of the lower flange, and the fireproof coating can be filled on site
(there is a wall under the bottom flange, and fire-retardant paint is not needed in general). The filling part is flexibly connected, so that the problem that the top of the beam bottom wall is easy to crack can be avoided;
b. the beam side concrete forms restraint on the steel beam web plate, the beam web plate cannot be locally bent, and the web plate can be thinner;
c. the additional steel bars are distributed according to the bending moment of the steel beam, and the overall length is not needed, so that the steel consumption is saved;
d. the specification is few, reduces the administrative cost: the bending resistance bearing capacity of the section is adjusted through the number and the diameter of the steel bars, and the steel beam can be produced in a standard part mode;
e. the webs do not require pegs. The combined effect of the steel beam and the concrete can be formed through the deformed steel bar;
f. the widths and the thicknesses of the upper flange and the lower flange are different, so that the stress distribution rule of the section of the composite beam is met, and the steel consumption is saved.
2) Saving field labor and accelerating construction period
a. No paint and fireproof coating are needed to be made on site;
b. the wall top secondary beam with the sound insulation requirement does not need to be filled on the spot;
3) performance enhancement
a. The sound insulation effect is better;
b. the anti-corrosion effect is better, the service life is longer, and the concrete protective layer has larger thickness and better durability than paint;
c. the surface effect is better: the appearance effect of the invention is that the concrete poured by the steel die has very smooth appearance, and the coating can be directly sprayed. The conventional steel beam is wrapped by the gypsum plate, so that the steel beam is easy to crack and poor in decoration durability;
d. does not protrude out of the wall body: the width of the beam section is 125mm or 150mm, and is generally consistent with the width of the bottom wall body and does not protrude out of the wall body. (the required width is wider under the condition of the same load of the conventional steel beam);
e. the rigidity is high during construction. Conventional steel beams are not assisted by web-side concrete during construction, tend to have poor vertical stiffness and poor torsional stiffness (conventional steel beams are open sections).
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. A novel combination secondary beam, its characterized in that includes:
casting a concrete floor slab in situ;
the structural beam body comprises a top flange plate, a beam web plate, a bottom flange plate and at least one tie piece, and the tie piece is embedded in the concrete floor slab and forms a tie integral structure with the concrete floor slab; the plate width of the top flange plate is not larger than that of the bottom flange plate, structural beam body concrete is pre-cast on two sides of the beam web, the top surface of the concrete structure is flush with the top surface of the top flange plate, and the width of the concrete structure is at least larger than that of the bottom flange plate.
2. The novel composite secondary beam as claimed in claim 1, wherein the width of the concrete structure is at least 10mm greater than the slab width of the bottom flange plate.
3. The novel composite secondary beam of claim 1, wherein a steel mesh for preventing cracking is provided in the concrete of the structural beam body.
4. The novel composite sub-beam defined in claim 1 wherein said bottom flange plate is provided with structural reinforcement along its length.
5. The novel composite sub-beam defined in claim 4 wherein there are at least two structural reinforcing bars, one on each side of the web.
6. The novel composite sub-beam defined in claim 4 wherein said structural reinforcing bars are located at longitudinally intermediate positions on said bottom flange plate.
7. The novel composite sub-beam of claim 1, wherein the width of the concrete structure is greater than the slab width of the top flange plate.
8. The novel composite secondary beam of claim 7, wherein the lower surface of the concrete structure is flush with the upper surface of the bottom flange plate.
9. The novel composite secondary beam as claimed in claim 1, wherein the web plate has mounting lugs at both ends thereof, and the mounting lugs have mounting holes.
10. The novel composite secondary beam of claim 1, wherein sealing plates are provided at both ends of the web.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111126320.8A CN113684956A (en) | 2021-09-26 | 2021-09-26 | Novel combined secondary beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111126320.8A CN113684956A (en) | 2021-09-26 | 2021-09-26 | Novel combined secondary beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113684956A true CN113684956A (en) | 2021-11-23 |
Family
ID=78587107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111126320.8A Pending CN113684956A (en) | 2021-09-26 | 2021-09-26 | Novel combined secondary beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113684956A (en) |
-
2021
- 2021-09-26 CN CN202111126320.8A patent/CN113684956A/en active Pending
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