阅读说明：本技术 抗剪正交胶合木-混凝土组合楼板 (Shearing-resistant orthogonal laminated wood-concrete combined floor slab ) 是由 丁文胜 刘佳宾 袁龙飞 杨欣瑶 于 2021-09-10 设计创作，主要内容包括：本发明提供了一种抗剪正交胶合木-混凝土组合楼板,包括CLT板、混凝土板和若干抗剪连接件,若干抗剪连接件设置在CLT板和混凝土板之间；CLT板的上端面间隔设置若干凹槽；抗剪连接件包括定位钢板结构和若干木螺钉,定位钢板结构包括钢板槽和两延伸钢板,两延伸钢板分别固定连接在钢板槽的顶部两外侧；钢板槽通过若干木螺钉固定在凹槽上,两延伸钢板位于混凝土板内。相比传统抗剪连接件,本发明能提高CLT板的滚动剪切性能及抗弯性能,能够使CLT板和混凝土板共同作用并保证其作为楼板时具有足够的刚度和承载能力,有效降低噪音,并且有较好的防火性能。(The invention provides a shear-resistant orthogonal laminated wood-concrete composite floor slab which comprises a CLT plate, a concrete plate and a plurality of shear-resistant connecting pieces, wherein the shear-resistant connecting pieces are arranged between the CLT plate and the concrete plate; a plurality of grooves are formed in the upper end face of the CLT plate at intervals; the shear connector comprises a positioning steel plate structure and a plurality of wood screws, the positioning steel plate structure comprises a steel plate groove and two extending steel plates, and the two extending steel plates are respectively and fixedly connected to the two outer sides of the top of the steel plate groove; the steel plate groove is fixed on the groove through a plurality of wood screws, and the two extending steel plates are positioned in the concrete plate. Compared with the traditional shear connector, the invention can improve the rolling shear performance and the bending resistance of the CLT plate, can ensure that the CLT plate and the concrete plate act together and have enough rigidity and bearing capacity when being used as a floor slab, effectively reduces noise and has better fireproof performance.)

1. A shear-resistant orthogonal laminated wood-concrete composite floor slab is characterized by comprising a CLT plate, a concrete plate and a plurality of shear-resistant connecting pieces, wherein the shear-resistant connecting pieces are arranged between the CLT plate and the concrete plate;

a plurality of grooves are formed in the upper end face of the CLT plate at intervals;

the shear connector comprises a positioning steel plate structure and a plurality of wood screws, the positioning steel plate structure comprises a steel plate groove and two extension steel plates, and the two extension steel plates are respectively and fixedly connected to the two outer sides of the top of the steel plate groove; the steel plate groove is fixed on the groove through a plurality of wood screws, and the two extending steel plates are positioned in the concrete plate.

2. The shear resistant orthogonal laminated wood-concrete composite floor slab as claimed in claim 1, wherein the groove is an isosceles inverted trapezoid groove, and the steel plate groove is an isosceles inverted trapezoid steel plate groove adapted to the inverted trapezoid groove.

3. The shear resistant cross-glued wood-concrete composite floor slab as recited in claim 1, wherein said inverted trapezoidal steel plate channel comprises a bottom plate and two side plates, said two side plates are fixedly disposed on both sides of said bottom plate, said bottom plate and said two side plates are both provided with mounting holes, and tail portions of said wood screws pass through said mounting holes into said CLT plate.

4. A shear resistant orthogonal laminated wood-concrete composite floor slab according to claim 3, wherein the wood screws on the bottom plate are perpendicular to the bottom plate, and the wood screws on the side plates are perpendicular to the side plates on which they are located.

5. A shear resistant cross-glued wood-concrete composite floor slab as defined in claim 3, wherein said two extension steel plates are fixedly disposed on the top outer sides of said side plates and parallel to said bottom plate.

6. A shear resistant orthogonal laminated wood-concrete composite floor slab as claimed in claim 5, wherein the angle between the two side plates and the bottom plate is 135 °.

7. The shear resistant cross-glued wood-concrete composite floor slab of claim 1, wherein a plurality of the positioning steel plate structures are equally spaced and arranged along the length direction of the CLT plate, and the length direction of the positioning steel plate structures is arranged along the width direction of the CLT plate.

8. A shear resistant cross-glued wood-concrete composite floor slab as claimed in claim 7, wherein the distance between two adjacent steel plate grooves is 400mm to 700 mm.

9. A shear resistant cross-glued wood-concrete composite floor slab as claimed in any one of claims 1 to 8, wherein said positioning steel plate structure is formed by bending a steel plate.

10. The shear resistant cross-glued wood-concrete composite floor slab as recited in claim 9, wherein said positioning steel plate structure is formed by cutting a steel plate on a machine tool, rolling the left and right sides of the steel plate into steel plate grooves, and rolling the upper ends of the steel plate grooves in opposite directions to form two said extension steel plates.

Technical Field

The invention belongs to the technical field of building engineering, and particularly relates to a shear-resistant orthogonal laminated wood-concrete composite floor slab.

Background

The wood is used as a building material, has the characteristics of light weight, high strength, attractive appearance, good processability and the like, is an abundant renewable resource, and can balance the felling amount and the growth amount through reasonable felling and scientific planting, thereby being widely used. The wood structure building has the advantages of environmental protection, energy conservation, good earthquake resistance and the like, and accords with the national sustainable development strategy.

Orthogonal laminated wood (CLT) originates from europe, and in recent years, a new generation of heavy wood structure building system represented by novel building material orthogonal laminated wood is widely applied to building civil houses, public buildings and the like. Compared with the orthogonal laminated wood floor, the orthogonal laminated wood-concrete composite floor can greatly improve the rigidity, the bearing capacity and the vibration isolation and sound insulation effects of the orthogonal laminated wood floor.

For the orthogonal laminated wood-concrete combined floor slab, the connection is the key influencing the stress performance. Traditional plywood gluing and simple groove design for the easy emergence of the destruction of coming unstuck and the destruction of concrete slab recess junction between quadrature veneer wood and the concrete slab, make the advantage of quadrature veneer wood and concrete slab be difficult to better utilization.

Disclosure of Invention

In order to solve the above problems, the present invention provides a shear-resistant orthogonal laminated wood-concrete composite floor slab, comprising a CLT slab, a concrete slab and a plurality of shear connectors, wherein the plurality of shear connectors are arranged between the CLT slab and the concrete slab;

a plurality of grooves are formed in the upper end face of the CLT plate at intervals;

the shear connector comprises a positioning steel plate structure and a plurality of wood screws, the positioning steel plate structure comprises a steel plate groove and two extension steel plates, and the two extension steel plates are respectively and fixedly connected to the two outer sides of the top of the steel plate groove; the steel plate groove is fixed on the groove through a plurality of wood screws, and the two extending steel plates are positioned in the concrete plate.

Preferably, the groove is an isosceles inverted trapezoid groove, and the steel plate groove is an isosceles inverted trapezoid steel plate groove matched with the inverted trapezoid groove.

Preferably, the inverted trapezoidal steel plate groove comprises a bottom plate and two side plates, the two side plates are fixedly arranged on two sides of the bottom plate, mounting holes are formed in the bottom plate and the two side plates, and the tail portion of the wood screw penetrates into the CLT plate from the mounting holes.

Preferably, the wood screws on the bottom plate are perpendicular to the bottom plate, and the wood screws on the side plates are perpendicular to the side plates on which the wood screws are located.

Preferably, the two extending steel plates are fixedly arranged at the outer sides of the tops of the two side plates, and the two extending steel plates are parallel to the bottom plate.

Preferably, the included angle between the two side plates and the bottom plate is 135 degrees.

Preferably, a plurality of the positioning steel plate structures are arranged at equal intervals along the length direction of the CLT plate, and the length direction of the positioning steel plate structures is arranged along the width direction of the CLT plate.

Preferably, the distance between two adjacent steel plate grooves is 400 mm-700 mm.

Preferably, the positioning steel plate structure is formed by bending a steel plate.

Preferably, the positioning steel plate structure is formed by cutting a steel plate on a machine tool, rolling the left side and the right side of the steel plate into steel plate grooves, and reversely rolling the upper ends of the steel plate grooves to form two extending steel plates.

Compared with the prior art, the invention has the following technical effects:

the invention provides a shear-resistant orthogonal laminated wood-concrete composite floor slab, wherein a plurality of shear-resistant connecting pieces are arranged between a CLT slab and a concrete slab, each shear-resistant connecting piece comprises a positioning steel plate structure and a plurality of wood screws, each positioning steel plate structure comprises a steel plate groove and two extension steel plates, and the two extension steel plates are respectively and fixedly connected to the two outer sides of the top of the steel plate groove; the steel plate groove is fixed on the groove on the upper end surface of the CLT plate through a plurality of wood screws, and the two extending steel plates are positioned in the concrete plate. The wood screw provided by the invention is driven into the CLT plate and used for reinforcing the CLT plate and improving the rolling shearing performance and the bending resistance. Concrete slabs are poured on the CLT slabs and the shear connectors to prevent lateral shear cracks from occurring at the joints with the CLT slabs when the concrete slabs are stressed out of the plane. Compared with the traditional shear connector, the invention can improve the rolling shear performance and the bending resistance of the CLT plate, can ensure that the CLT plate and the concrete plate act together and have enough rigidity and bearing capacity when being used as a floor slab, effectively reduces noise and has better fireproof performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. In the drawings:

fig. 1 is a schematic structural view of a shear resistant cross-laminated wood-concrete composite floor slab according to a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view of a shear resistant cross-glued wood-concrete composite floor slab (with a concrete slab removed) according to a preferred embodiment of the present invention;

FIG. 3 is an enlarged cross-sectional view taken at A in FIG. 1;

fig. 4 is a side view of a shear connector according to a preferred embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

Referring to fig. 1 to 4, a shear-resistant orthogonal laminated wood-concrete composite floor slab includes a CLT plate 3, a concrete plate 2 and a plurality of shear connectors 1, wherein the shear connectors 1 are disposed between the CLT plate 3 and the concrete plate 2;

a plurality of grooves are formed in the upper end face of the CLT plate 3 at intervals;

the shear connector 1 comprises a positioning steel plate structure 11 and a plurality of wood screws 12, wherein the positioning steel plate structure 11 comprises a steel plate groove and two extending steel plates 113, and the two extending steel plates 113 are respectively and fixedly connected to the two outer sides of the top of the steel plate groove; the steel plate groove is fixed on the groove by a plurality of wood screws 12, and two extending steel plates 113 are positioned in the concrete plate 2. The wood screw 12 provided by the embodiment is driven into the CLT board 3 to reinforce the CLT board 3 which is an orthogonal plywood board, so that the rolling shearing performance and the bending resistance are improved. The concrete slab 2 is poured on the CLT slab 3 and the shear connector 1 to prevent the transverse shear cracks from generating at the joint of the CLT slab 3 when the concrete slab 2 is stressed out of the plane.

The shape of the groove is not limited, and the steel plate groove is matched with the groove. This embodiment uses recess and steel sheet groove to be the isosceles trapezoid groove as the example, promptly in this embodiment, the recess is the isosceles trapezoid groove of falling, the steel sheet groove be with the isosceles trapezoid steel sheet groove of falling trapezoidal groove adaptation.

The inverted trapezoidal steel plate groove comprises a bottom plate 111 and two side plates 112, and the two side plates 112 are fixedly arranged on two sides of the bottom plate 111.

In this embodiment, a first mounting hole is provided at a central position of the bottom plate 111, a tail portion of the first wood screw 12 'penetrates into the CLT plate 3 from the first mounting hole, a head portion of the first wood screw 12' is in the inverted trapezoidal steel plate slot, and the tail portion is in the CLT plate 3. The first wood screw 12' is perpendicular to the base plate 111.

The central position of the side plate 112 is provided with a second mounting hole, the tail part of the second wood screw 12 "penetrates into the CLT plate 3 from the second mounting hole, the head part of the second wood screw 12" is arranged in the inverted trapezoidal steel plate groove, and the tail part is arranged in the CLT plate 3. The second wood screw 12 "is perpendicular to the side plate 112 on which it is located.

In this embodiment, the two extension steel plates 113 are fixedly disposed at the top outer sides of the two side plates 112, and the two extension steel plates 113 are parallel to the bottom plate 111.

The included angles between the side plates 112 and the bottom plate 111 are not limited, in this embodiment, the included angles between the two side plates 112 and the bottom plate 111 are both 135 °, and the included angles between the two extending steel plates 113 and the bottom plate 111 are also both 135 °.

In this embodiment, the plurality of grooves are equally spaced along the length direction of the CLT plate 3, and therefore, the plurality of positioning steel plate structures 11 are also equally spaced and are arranged along the length direction of the CLT plate 3, preferably, the distance between two adjacent positioning steel plate structures 11 is 400mm to 700mm, and similarly, the distance between two adjacent steel plate grooves is also 400mm to 700 mm.

In the present embodiment, the length direction of the positioning steel plate structure 11 is arranged along the width direction of the CLT plate 3, i.e. the length of the positioning steel plate structure 11 corresponds to the short side distance of the CLT plate 3.

In order to improve the strength of the positioning steel plate structure 11, the positioning steel plate structure 11 is preferably an integrally formed structure, in this embodiment, the positioning steel plate structure 11 is formed by cutting a steel plate on a machine tool, rolling 135 ° bevel angles on the left and right sides of the steel plate to form a steel plate groove, and then rolling 135 ° bevel angles on the upper end of the steel plate groove in the opposite direction to form two extension steel plates 113.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.