CN214739116U

CN214739116U - FRP reinforcing CLT-concrete composite floor

Info

Publication number: CN214739116U
Application number: CN202120077087.8U
Authority: CN
Inventors: 王立彬; 赵珉; 丁祥
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-11-16
Anticipated expiration: 2031-01-13

Abstract

The utility model provides a FRP reinforcing CLT-concrete composite floor, include: FRP section bar, CLT board, concrete slab and foraminiferous arched steel plate. The concrete plate is poured above the CLT plate; the upper part of the CLT plate is uniformly provided with notches along the length direction, and the bottom of the CLT plate is provided with notches corresponding to the FRP profiles; the arched steel plate with the hole is vertically placed in the upper notch to connect the concrete plate and the CLT plate; the FRP section is adhered below the CLT plate through modified epoxy resin. In the utility model, the FRP can improve the bending resistance of the structure, the CLT plate has excellent dimensional stability, the arched steel plate with holes bears the longitudinal shearing force of the interface of the CLT plate and the concrete plate, the arched structure of the steel plate is easy to bear the shearing force of the notch, and the concrete in the hole is opened, so that the steel plate and the wood-concrete composite plate form a whole body, and the relative sliding between the concrete plate and the CLT plate is limited; the utility model discloses a simple structure easily produces.

Description

FRP reinforcing CLT-concrete composite floor

Technical Field

The utility model relates to a FRP reinforcing CLT-concrete composite floor is applied to the timber structure building of modern generation, belongs to the civil engineering field.

Background

China has abundant wood resources, and wood structures are favored by the building industry because wood has the advantages of high strength-to-weight ratio, good thermal insulation performance, good earthquake resistance and the like. However, wood is an anisotropic material, and the conventional wood structure is limited in span and structural form. In order to make up for the deficiencies of wood structures, the form of composite structures is often used in wood structure buildings.

The wood-concrete composite structure connects concrete and wood into a whole through the shear connector, and the strength and the rigidity of the structure are improved due to the common stress. The wood has good toughness and tensile strength, the concrete has good compressive strength, larger rigidity and higher stability, and the performances of the two materials can be fully exerted. Meanwhile, the defects of inflammability, easy corrosion and the like of wood are overcome. In order to better exert the mechanical property of the wood-concrete combined structure, CLT (cross laminated wood) is adopted to replace the traditional wood, so that the influence of wood defects and strength variability is reduced. Compared with traditional wood, the CLT has better dimensional stability, relatively higher rigidity and bidirectional strength, and is suitable for floors with larger span and size.

To sum up, the utility model provides a FRP reinforcing CLT-concrete composite floor, the common atress of structure after the combination has higher intensity and rigidity and good anti-seismic performance. The notch is formed in the upper portion of the CLT plate, the arched steel plate with the holes is arranged, longitudinal shearing force between the concrete plate and the CLT plate can be borne, the arched structure of the steel plate can easily bear the shearing force of the notch, the concrete in the holes is formed, the steel plate and the wood-concrete composite plate form a whole, relative sliding between the concrete and the CLT is limited, and the concrete plate and the CLT plate are prevented from being lifted. The bottom of the CLT plate is reinforced by the FRP sectional material, so that the bending strength and the bending rigidity of the structure can be effectively improved.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved is as follows: the utility model aims at providing a FRP reinforcing CLT-concrete composite floor, utilize FRP reinforcement technique to improve the bending resistance of structure, through set up the notch on the CLT board and set up foraminiferous arch steel sheet, can undertake the longitudinal shear force between concrete slab and the CLT board, the domes of steel sheet easily bear the shearing force of notch, concrete in the trompil, make steel sheet and wood-concrete composite board form wholly, restriction relative sliding between concrete slab and the CLT board prevents to take place to lift between concrete slab and the CLT board.

The technical scheme is as follows: an FRP reinforced CLT-concrete composite floor slab comprising: FRP section bar, CLT board, concrete slab and foraminiferous arched steel plate.

An FRP reinforced CLT-concrete composite floor slab is characterized in that a concrete slab is poured above a CLT slab; the upper part of the CLT plate is uniformly provided with notches along the length direction, and the bottom of the CLT plate is provided with notches corresponding to the FRP profiles; the arched steel plate with the hole is vertically placed in the notch to connect the concrete plate and the CLT plate; the FRP section is adhered below the CLT plate through modified epoxy resin.

The FRP reinforced CLT-concrete composite floor is characterized in that the size of a concrete plate is 2600mm in length, 300mm in width and 60mm in height, and the size of the CLT plate is 2600mm in length, 300mm in width and 105mm in height.

The FRP reinforced CLT-concrete composite floor is characterized in that the size of a notch formed in the upper part of the CLT plate is 80mm in length, 60mm in width and 30mm in depth, and the size of the notch at the bottom is the same as the size of 3 stiffening ribs of the FRP section.

The FRP reinforced CLT-concrete composite floor is characterized in that the arch steel plate with holes is divided into a part with holes and a part without holes, the part without holes is embedded into the CLT plate, and the part with holes is embedded into the concrete plate.

The FRP reinforced CLT-concrete composite floor is characterized in that the FRP section is provided with 3 stiffening ribs, the length and the width of the FRP section are the same as those of the CLT, the thickness is 5-7 mm, the spacing between the stiffening ribs is 50mm, the thickness of the stiffening ribs is 5-7 mm, the height of the middle stiffening rib is 30mm, and the height of the stiffening ribs at two ends is 15 mm.

Has the advantages that: a FRP reinforcing CLT-concrete combination floor, the common atress of structure after the combination has higher intensity and rigidity and good anti-seismic performance. The CLT plate is provided with the notch and the arched steel plate with the hole, so that longitudinal shearing force between the concrete plate and the CLT plate can be borne, relative sliding between the concrete and the CLT plate is limited, and the concrete plate and the CLT plate are prevented from being lifted. The bottom of the CLT plate is reinforced by the FRP, so that the bending strength and the bending rigidity of the structure can be effectively improved.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is a schematic vertical section view of an embodiment of the present invention;

FIG. 3 is a schematic view of a perforated arched steel plate according to an embodiment of the present invention;

FIG. 4 is a schematic view of an FRP profile according to an embodiment of the present invention;

wherein: 1. concrete slab, 2, CLT board, 3, arch steel plate with holes, 4, FRP section bar.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Examples

As shown in fig. 1-4, the FRP reinforced CLT-concrete composite floor slab comprises FRP profiles, CLT slabs, concrete slabs and arch-shaped steel plates with holes.

Claims

1. The FRP reinforced CLT-concrete composite floor is characterized by being formed by an FRP (fiber reinforced plastic) section (4), a concrete plate (1), a CLT plate (2) and a perforated arched steel plate (3) together; the concrete slab (1) is poured above the CLT slab (2); the upper part of the CLT plate (2) is uniformly provided with notches along the length direction, and the bottom of the CLT plate is provided with notches corresponding to the FRP sectional material (4); the arched steel plate (3) with the hole is vertically placed in the upper notch to connect the concrete slab (1) and the CLT slab (2); the FRP section bar (4) is adhered to the lower part of the CLT plate (2) through modified epoxy resin.

2. An FRP reinforced CLT-concrete composite floor slab as claimed in claim 1, characterized in that the concrete slab (1) is 2600mm in length, 300mm in width and 60mm in height, and the CLT plate (2) is 2600mm in length, 300mm in width and 105mm in height.

3. The FRP reinforced CLT-concrete composite floor slab as claimed in claim 1, wherein the size of the notch formed at the upper part of the CLT plate (2) is 80mm in length, 60mm in width and 30mm in depth, and the size of the notch at the bottom part is the same as the size of 3 stiffening ribs of the FRP section.

4. The FRP reinforced CLT-concrete composite floor as claimed in claim 1, wherein the perforated arch steel plate (3) is divided into a perforated part and a non-perforated part, the non-perforated part is embedded in the CLT plate (2), and the perforated part is embedded in the concrete plate (1).

5. The FRP-reinforced CLT-concrete composite floor slab as claimed in claim 1, wherein the FRP section (4) has 3 stiffening ribs, the length and width of the FRP section (4) are the same as those of the CLT slab, the thickness of the FRP section is 5-7 mm, the spacing between the stiffening ribs is 50mm, the thickness of the stiffening ribs is 5-7 mm, the height of the middle stiffening rib is 30mm, and the height of the stiffening ribs at both ends is 15 mm.