CN210737907U

CN210737907U - Steel-wood-concrete composite beam

Info

Publication number: CN210737907U
Application number: CN201921134328.7U
Authority: CN
Inventors: 黄冀卓; 吴翔熙; 邱泽玮
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-06-12
Anticipated expiration: 2029-07-19

Abstract

The utility model relates to a steel-wood-concrete composite beam, including reinforced concrete slab and the H shaped steel roof beam that is located reinforced concrete slab downside, the U-shaped inslot of H shaped steel roof beam both sides is installed the timber beams. The steel-wood-concrete combined beam of the utility model utilizes steel, wood and concrete to form the combined beam, under the load action, the concrete is mainly pressed, and the wood and steel are mainly pulled, so that the mechanical characteristics of high compressive strength of the concrete and high tensile strength of the wood and steel can be fully exerted; the cross-sectional rigidity and the bearing capacity of the beam can be effectively improved, the deflection is reduced, the risk of local buckling and overall instability is reduced, and the fire resistance of the steel beam is favorably improved.

Description

Steel-wood-concrete composite beam

Technical Field

The utility model relates to a steel-wood-concrete combination roof beam.

Background

The traditional reinforced concrete building needs to consume a large amount of resources, causes serious pollution and damage to the environment and ecology, so that a series of policy and policies about promoting the healthy development of green buildings are continuously issued in China under the background of current ecological civilization construction and sustainable development, wherein the advocated development of the wood structure building in the conditioned areas is definitely pointed out. The wood is used as the only renewable natural building material, not only can absorb a large amount of carbon dioxide in the growth process to play a role of fixing carbon and reduce the greenhouse effect, but also can only generate a small amount of carbon dioxide in the processing process, has small pollution to the environment, has good heat insulation performance and can achieve the effect of saving energy when being applied to buildings.

However, wood has obvious anisotropic characteristics, the mechanical property difference in all directions is large, the compressive strength is much lower than the tensile strength, the elastic modulus of the wood is low, and the bending resistance bearing capacity is relatively low, so that the height and the number of layers of the wood structure building are strictly limited at present. In order to break through the application limitation of the wood structure, wood is generally combined with other materials to form a composite structure, such as a wood-concrete composite beam and a steel-wood composite beam. However, when the span of the wood-concrete composite beam is large, in order to ensure that the deflection cannot be too large under the limit state of normal use, the section of the composite beam is high, so that the utilization rate of the whole space is reduced; most of steel materials in the steel-wood composite beam are thin-walled steel, the thickness is thin, the steel-wood composite beam is easy to bend, the bearing capacity of the composite beam is improved limitedly, and the effect of a floor slab is not considered in the conventional steel-wood composite beam, so that the steel-wood composite beam does not accord with the engineering practice.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a steel-wood-concrete composite beam, which can effectively improve the section rigidity and the bearing capacity of the beam, and reduce the risk of local buckling and overall instability.

The utility model discloses a following scheme realizes: a steel-wood-concrete combined beam comprises a reinforced concrete slab and H-shaped steel beams positioned on the lower side of the reinforced concrete slab, wherein wood beams are arranged in U-shaped grooves in two sides of each H-shaped steel beam.

Furthermore, the upper side of the H-shaped steel beam is fixedly connected with studs which are arranged along the length direction and embedded in the reinforced concrete slab.

Furthermore, the upper flange and the lower flange of the H-shaped steel beam are provided with bolts which are arranged along the length direction of the H-shaped steel beam and are drilled into the wood beam in a penetrating mode.

Furthermore, the double-head screw rod penetrates through a web plate of the H-shaped steel beam and the wood beams on two sides, and nuts are screwed at two ends of the double-head screw rod.

Compared with the prior art, the utility model discloses following beneficial effect has: the steel-wood-concrete combined beam of the utility model utilizes steel, wood and concrete to form the combined beam, under the load action, the concrete is mainly pressed, and the wood and steel are mainly pulled, so that the mechanical characteristics of high compressive strength of the concrete and high tensile strength of the wood and steel can be fully exerted; the mechanical characteristics of the three materials can be fully exerted, the section rigidity and the bearing capacity of the beam are effectively improved, the deflection is reduced, the risk of local buckling and overall instability is reduced, and the fire resistance of the steel beam is improved.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and related drawings.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

fig. 2 is a side view of an embodiment of the present invention;

FIG. 3 is a side view of an H-shaped steel beam according to an embodiment of the present invention;

fig. 4 is a side view of a wood beam in an embodiment of the invention;

the reference numbers in the figures illustrate: 1-H-shaped steel beam, 11-bolt holes, 12-bolt holes, 2-wood beam, 3-reinforced concrete plate, 31-reinforcing mesh, 32-concrete, 4-double-threaded screw, 5-gasket, 6-bolt and 7-bolt.

Detailed Description

As shown in fig. 1 to 4, a steel-wood-concrete composite beam comprises a reinforced concrete slab 3 and an H-shaped steel beam 1 positioned on the lower side of the reinforced concrete slab 3, wherein wood beams 2 are installed in U-shaped grooves on two sides of the H-shaped steel beam 1, and the steel, wood and concrete are utilized to form the composite beam, so that respective mechanical characteristics of the three materials can be fully exerted, the section rigidity and the bearing capacity of the beam are effectively improved, the risk of local buckling and overall instability is reduced, and the fire resistance of the steel beam is improved; under the action of load, the concrete is mainly pressed, and the wood and the steel are mainly pulled, so that the mechanical characteristics of high compressive strength of the concrete and high tensile strength of the wood and the steel can be fully exerted; the wood beam can effectively improve the section rigidity of the steel-concrete composite beam and reduce the deflection; the wood can replace stiffening ribs to improve the stability of the H-shaped steel beam and reduce the risks of local buckling and overall instability; in addition, the wood beam is tightly attached to two sides of the web plate of the H-shaped steel beam, the direct fire area of the steel beam can be reduced, a charring layer can be formed on the surface of the wood after the wood is fired, the web plate of the steel beam inside is protected, and the fire resistance of the composite beam is effectively improved.

In this embodiment, the studs 7 arranged in the longitudinal direction and embedded in the reinforced concrete slab are fixedly connected to the upper side of the H-shaped steel beam 1, the studs 7 are welded to the upper flange of the H-shaped steel beam 1, and the studs 7 serve as shear resistant members connected to the reinforced concrete slab 3.

In this embodiment, the upper flange and the lower flange of the H-shaped steel beam 1 are provided with screws 6 arranged along the length direction thereof and screwed into the wood beam, and the upper flange and the lower flange of the H-shaped steel beam are provided with screw holes for the screws to pass through.

In this embodiment, still including the double threaded screw 4 that passes the web of H shaped steel roof beam 1 and both sides wooden beam, the both ends of double threaded screw 4 have connect the nut soon, offer the bolt hole that is used for wearing to establish double threaded screw on the web of wooden beam and H shaped steel roof beam.

The double-headed screw, the screw and the stud are used as shear connectors to realize the combined action of the reinforced concrete slab, the H-shaped steel beam and the wood beam, ensure the combined effect among the reinforced concrete slab, the H-shaped steel beam and the wood beam, and aim to exert the respective mechanical characteristics of the three materials, the advantages are complementary and are respectively required, so that the three materials have integrity, the respective mechanical characteristics of the three materials can be exerted, and the effect of fully utilizing the material performance is achieved; the components can be prefabricated in a factory, the manufactured steel-wood composite beam is transported to a construction site and installed at a corresponding position, a reinforcing mesh is laid, concrete is poured, after the reinforced concrete is hardened, the combined effect of a reinforced concrete slab and the steel-wood composite beam can be realized through the studs, and the steel-wood-concrete T-shaped composite beam is further formed.

A construction method of a steel-wood-concrete composite beam comprises the following steps: (1) processing an H-shaped steel beam and a wood beam in a factory, forming screw holes 12 at two sides of an upper flange and a lower flange of the H-shaped steel beam 1 at certain intervals, forming bolt holes 11 at the middle part of a web plate at certain intervals, and welding studs 7 at certain intervals in the middle of the upper flange of the H-shaped steel beam; meanwhile, bolt holes 11 corresponding to the bolt holes in the web plate of the H-shaped steel beam 1 are formed in the wood beam 2; (2) the wood beam 2 is embedded into U-shaped grooves on two sides of a web plate of the H-shaped steel beam 1, and bolt holes in the wood beam 2 are aligned with bolt holes in the web plate of the H-shaped steel beam 1; (3) the stud bolts 4 penetrate through bolt holes 11 in webs of the wood beam and the H-shaped steel beam, then the two ends of the stud bolts are locked by nuts, and then the bolts 6 penetrate through screw holes in an upper flange and a lower flange of the H-shaped steel beam 1 and are drilled into the wood beam 2, so that the H-shaped steel beam 1 and the wood beam 2 are tightly connected to form the steel-wood combined beam; (4) the manufactured steel-wood composite beam is transported to a construction site and installed, then a reinforcing mesh 31 is laid on the steel-wood composite beam, concrete 32 is poured to form a reinforced concrete slab 3, after the reinforced concrete slab 3 is hardened, the steel-wood composite beam can be combined with the steel-wood composite beam through the studs 7, and the steel-wood-concrete composite beam is formed.

Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.

The utility model discloses if disclose or related to mutual fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.

The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims

1. A steel-wood-concrete composite beam is characterized in that: the H-shaped steel beam comprises a reinforced concrete slab and H-shaped steel beams connected to the lower side of the reinforced concrete slab, and wood beams are mounted in U-shaped grooves in two sides of each H-shaped steel beam.

2. The steel-wood-concrete composite beam according to claim 1, wherein: the upper side of the H-shaped steel beam is fixedly connected with studs which are arranged along the length direction and embedded in a reinforced concrete slab.

3. The steel-wood-concrete composite beam according to claim 2, wherein: and screws which are arranged along the length direction of the H-shaped steel beam and are drilled into the wood beam penetrate through the upper flange and the lower flange of the H-shaped steel beam.

4. The steel-wood-concrete composite beam according to claim 3, wherein: the double-end screw rod is characterized by further comprising a web plate penetrating through the H-shaped steel beam and double-end screw rods penetrating through the wood beams on the two sides, and nuts are screwed at the two ends of each double-end screw rod.