CN212105239U

CN212105239U - Bending-resistant reinforced floor structure

Info

Publication number: CN212105239U
Application number: CN202020142149.4U
Authority: CN
Inventors: 贾远林; 陈祎安
Original assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Current assignee: Architecture Design and Research Institute of Tongji University Group Co Ltd
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-12-08
Anticipated expiration: 2030-01-22

Abstract

The utility model relates to a floor structure is consolidated to bending resistance, include: the floor slab comprises a floor slab main body, wherein fixing through holes penetrating through the surfaces of two sides of the floor slab main body are formed in the floor slab main body; the reinforcing body is provided with a shear connector, and the shear connector is arranged in the fixing through hole from the lower part of the floor slab main body, so that the reinforcing body is fixed on the lower surface of the floor slab main body; and the bonding body is filled in a gap between the hole wall of the fixing through hole and the shear connector, so that the reinforcing body is bonded to the floor slab main body. In the embodiment, the reinforcing plate group is arranged from the lower part, and the reinforcing plate group on the lower surface can bear the load of the floor slab and reinforce the floor slab; the reinforcing plate group can prevent the bonding body from falling off from the lower surface of the floor slab main body when concrete serving as the bonding body is poured, and has the function of a concrete template. The reinforcing body and the floor slab body are combined to form a whole, so that shearing resistance and coordinated deformation can be resisted.

Description

Bending-resistant reinforced floor structure

Technical Field

The utility model relates to a architectural design construction field especially relates to floor structure is consolidated to bending resistance.

Background

In the use process of the floor slab in a large building, the floor slab is easy to deform and bend due to large load, so that the floor slab needs to be subjected to bending resistance reinforcement in advance.

The concrete floor that uses always at present consolidates the solution thinking and mainly has two kinds: 1) cross-section enlarging method: bonding the rear reinforced structure and the existing floor structure together through fine aggregate concrete or mortar; 2) the carbon fiber cloth, the steel plate and the like are directly adhered to the surface of the floor slab by using chemical structural adhesive.

When the method for reinforcing by increasing the cross section is adopted, the bonding property of the rear reinforcing structure and the existing floor slab structure is not strong, the shear-resistant bonding property after the rear reinforcing structure and the existing floor slab structure are combined is poor, relative sliding is easy to occur until the rear reinforcing structure and the existing floor slab structure are separated and fall off, and the coordination deformation capability of the rear reinforcing structure and the existing floor slab structure is poor; in addition, the construction difficulty of the section increasing method is high, the construction period is long, the construction cost is high, particularly, the minimum of a newly-increased section is specified by a standard and is not less than 40mm, actually, due to the construction and protective layer structure requirements, the newly-increased section needs to be more than 60mm, so that the new problem of load increase caused by the increase of the section is brought, and the problem of reinforcement of foundations, columns, beams and the like in the building is further caused.

The method for reinforcing the floor slab by sticking the materials such as the carbon fiber cloth or the steel plate needs to use the chemical cementing agent, the chemical cementing agent needs to be regularly checked, the first checking time is not later than 10 years, the later-stage detection is still needed, the rise of the cost of the whole life cycle is brought to the later-stage maintenance, and the problems of long construction period, unstable quality and the like exist simultaneously.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a bending-resistant reinforced floor slab structure to the problem that the reinforcing effect of traditional floor slab reinforcing mode is not good, the construction degree of difficulty is big, with high costs and be not convenient for maintain.

A bend-resistant reinforced floor structure comprising:

the floor slab comprises a floor slab main body, wherein fixing through holes penetrating through the surfaces of two sides of the floor slab main body are formed in the floor slab main body;

the reinforcing body is provided with a shear connector, and the shear connector is arranged in the fixing through hole from the lower part of the floor slab main body, so that the reinforcing body is fixed on the lower surface of the floor slab main body;

and the bonding body is filled in a gap between the hole wall of the fixing through hole and the shear connector, so that the reinforcing body is bonded to the floor slab main body.

The bending-resistant reinforced floor slab structure at least has the following beneficial technical effects:

(1) in the embodiment, the reinforcing plate group is arranged from the lower part, and the reinforcing plate group arranged on the lower surface of the floor slab main body can bear the load of the floor slab and reinforce the floor slab; on the other hand, the reinforcing plate group can prevent the adhesive body from falling off from the lower surface of the floor slab body when the concrete as the adhesive body is poured, and also has the function of a concrete formwork.

(2) The shear resistant connecting piece is adopted to solve the problems of shear resistant bonding and coordinated deformation of the reinforcing body and the existing floor slab structure. The shear connector is arranged on the reinforcing body, the integral firm connection between the reinforcing body and the original structure floor slab main body is realized by using the bonding body connection mode, the reinforcing body and the floor slab main body can be completely integrated after being combined, the reinforcing body can resist shearing when bearing horizontal force, the relative sliding and even separation and falling between the reinforcing body and the floor slab main body are avoided, and meanwhile, the combined reinforcing body and the floor slab main body can be coordinately deformed after being stressed, so that the bending resistance reinforcement of the original structure floor slab main body is realized;

(3) the construction difficulty is lower, the operation is more convenient, and the operation steps are fewer, so that the construction period is directly shortened, and the labor cost is further reduced; the used raw materials are less, the price is low, and the material cost is reduced;

(4) the original floor structure is basically not damaged, so that the integrity of the stressed structure of the original floor main body is ensured, meanwhile, the influence on the original structural function of the floor main body is small, the net height of the original floor main body structure is fully reserved in the construction process, the load increase caused by the increase of the cross section is avoided, and therefore, the foundation, the column, the beam and the like in the building do not need to be reinforced for the second time; because the chemical cementing agent is not needed, the later maintenance is simple, the reinforcing performance is good after long-term use, the service life of the whole structure is prolonged, and the life cycle cost is low;

in one embodiment, the reinforcing body comprises a reinforcing plate group which is arranged in a crossed manner on the same plane, and the reinforcing plate group is fixed in the middle of the lower surface of the floor slab main body.

In one embodiment, the reinforcing plate group comprises a plurality of reinforcing plates arranged in a criss-cross manner.

In one embodiment, the shear connector comprises pegs provided on the surface of the reinforcement.

In one embodiment, the shear connector further comprises a spiral stirrup, and the spiral stirrup is sleeved on the bolt.

In one embodiment, the diameter of the spiral stirrup is 10mm-20mm larger than the diameter of the maximum cross section of the pin.

In one embodiment, the length of the peg is 70-80% of the thickness of the floor slab body.

In one embodiment, the pegs on each reinforcing plate are provided in plurality, and the pegs are respectively inserted into the fixing through holes on the surface of the floor slab body corresponding to the positions of the pegs.

In one embodiment, the diameter of the fixing through hole is 40-60 mm larger than the diameter of the maximum cross section part of the bolt.

In one embodiment, the fixing device further comprises a positioning counter bore which is arranged on the upper surface of the floor slab main body and used for exposing the reinforcing rib net in the floor slab main body so as to position the fixing through hole.

Drawings

Fig. 1 is a schematic view of a floor slab main body in the present invention;

FIG. 2 is a schematic view of the present invention, wherein a positioning counter bore and a fixing through hole are formed in the surface of the floor slab main body, and a shear connector is disposed in the fixing through hole;

FIG. 3 is an enlarged partial view of the locating counterbore of FIG. 2;

FIG. 4 is a schematic view of the present invention showing reinforcement members disposed on the lower surface of a main body of a floor slab;

fig. 5 is the utility model discloses arrange the local cross-sectional view who adds the solid under floor main part surface.

In the figure: 100. a floor slab body; 101. a fixing through hole; 102. positioning the counter bore; 103. a reinforcing rib net;

200. reinforcing the body; 201. a reinforcing plate group; 201a, a reinforcing plate; 210. a shear connector; 2101. a stud; 2102. a spiral stirrup;

300. and (3) bonding the bodies.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Those of ordinary skill in the art will recognize that variations and modifications of the various embodiments described herein can be made without departing from the scope of the invention, which is defined by the appended claims. Moreover, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 5, in an embodiment of the present invention, a bending-resistant reinforced floor slab structure is provided, which includes a floor slab main body 100, a reinforcing body 200 and a bonding body 300. The floor slab body 100 is a plate-shaped structure between two floors in a building, and is provided with fixing through holes 101 penetrating through both side surfaces of the floor slab body 100. The reinforcing body 200 is a reinforcing structure of the floor main body 100, and a shear connector 210 is provided on the reinforcing body 200, and the shear connector 210 is inserted into the fixing through-hole 101 from below the floor main body 100, so that the reinforcing body 200 is fixed to the lower surface of the floor main body 100. The adhesive body 300 is filled in a gap between the hole wall of the fixing through hole 101 and the shear connector 210, so that the shear connector 210 is fixed in the fixing through hole 101 of the floor slab main body 100 to achieve the purpose of firmly connecting the reinforcing body 200 and the floor slab main body 100.

The present embodiment employs the shear connector 210 to solve the problems of shear adhesion and coordinated deformation of the reinforcement 200 with the existing floor structure. The shear connectors 210 are arranged on the reinforcing bodies 200, and the reinforcing bodies 200 are integrally and firmly connected with the original structural floor slab main body 100 by using the bonding body 300 for connection, so that the reinforcing bodies 200 and the floor slab main body 100 can be completely integrated after being combined, the reinforcing bodies 200 and the floor slab main body 100 can resist shearing when bearing horizontal force, the relative sliding and even separation and falling between the reinforcing bodies 200 and the floor slab main body 100 can be avoided, and the combined reinforcing bodies 200 and the floor slab main body 100 can be coordinately deformed after being stressed, so that the bending resistance reinforcement of the original structural floor slab main body can be realized;

the embodiment basically does not damage the original floor structure, thereby ensuring the integrity of the stressed structure of the original floor main body, simultaneously has little influence on the original structure function of the floor main body, fully keeps the net height of the original floor main body structure in the construction process, does not increase the cross section to cause the increase of load, and further does not need to carry out secondary reinforcement on foundations, columns, beams and the like in the building; because the chemical cementing agent is not needed, the later maintenance is simple, the reinforcing performance is good after long-term use, the service life of the whole structure is prolonged, and the life cycle cost is low.

Referring to fig. 4, in some embodiments, the reinforcing body 200 includes reinforcing plate groups 201 arranged in a cross manner in the same plane, and the reinforcing plate groups 201 are fixed to the middle portion of the lower surface of the floor slab body 100. The reinforcing plate groups 201 which are arranged in the same plane in a crossed mode form a net-shaped reinforcing surface, and most of the weight and load of the floor slab main body 100 can be borne from the lower side, so that the floor slab is effectively reinforced; meanwhile, the middle part of the floor slab main body 100 is more concentrated and easier to bend than the load borne by the edge part, and the reticular reinforcing plate 201 can directly bear and reinforce the part with serious middle load from the bottom, so that the floor slab can resist bending more effectively.

Preferably, the reinforcing plate group 201 in fig. 4 includes a plurality of reinforcing plates 201a arranged crosswise. Specifically, the reinforcing plate 201a can be arranged on the lower surface of the floor slab main body 100 according to a preset reinforcing plate group 201 mode, the use mode is flexible, and transportation, assembly and disassembly are facilitated. It is understood that the reinforcing plate assembly 201 may be a single piece of mesh-structured plate disposed vertically and horizontally on the bottom of the floor slab body 100, and is not limited thereto.

In some embodiments, the shear connectors 210 include pegs 2101 provided on the surface of the reinforcement body 200, as shown in FIG. 5. Specifically, the head of the pin 2101 is fixed to the surface of the reinforcing plate set 201, and the tail of the pin 2101 is inserted into the fixing through-hole 101. The studs 2101 have strong anchoring force and can be firmly fixed in the fixing through holes 101 of the floor slab main body 100 under the action of the bonding bodies 300, so that the reinforcing plate 201a and the floor slab main body 100 are firmly bonded together; meanwhile, when the reinforcing plate 201a and the floor slab main body 100 bear horizontal acting force, the studs 2101 serving as the shear connectors 210 can bear certain horizontal force, so that shearing can be effectively resisted, and relative sliding and even separation and falling between the reinforcing plate 201a and the floor slab main body 100 are avoided.

Referring to fig. 2 and 3, in some embodiments, a plurality of the pegs 2101 are provided on each of the reinforcing plates 201a, and a plurality of the pegs 2101 are respectively inserted into a plurality of the fixing through holes 101 of the floor body 100 corresponding to the positions of the pegs 2101. The reinforcing plate 201a is fixed on the surface of the floor slab main body 100 through a plurality of studs 2101, and the studs 2101 with a large number can provide a large anchoring connection force, can resist horizontal shearing to a large extent, and has stronger capability of coordinating deformation, thereby ensuring the stability and safety of the connection of the reinforcing body 200 and the floor slab main body 100.

Preferably, the studs 2101 used should be 70-80% of the thickness of the floor body 100 in order to achieve a good anchorage connection. In order to facilitate the installation of the studs 2101 and the filling of the cohesive body 300 as much as possible, the diameter of the fixing through-holes 101 is 40mm-60mm larger than the diameter of the largest cross-sectional area of the studs 2101.

Referring to fig. 3 and 5, the shear connector 210 further includes a helical reinforcement 2102, and the helical reinforcement 2102 is sleeved on the peg 2101. The spiral stirrup 2102 can play a role in restraining the bonding body 300 around the stud 2101, so that the stud 2101 and the bonding body 300 form an integral connecting structure, and the situation that the stud 2101 slides due to the early damage of the bonding body 300 is prevented, so that the reliability of the connection of the reinforcing body 200 and the floor slab main body 100 can be ensured. Preferably, the diameter of the spiral stirrup 2102 is 10mm to 20mm larger than the diameter of the maximum section of the pin 2101, and the length of the spiral stirrup 2102 is 4 mm.

Of course, in other embodiments, the shear connectors 210 may be replaced with other shear connectors 210, such as short channel steel, bent rib connectors, etc., without limitation.

In some embodiments, the cementitious body 300 is concrete. Specifically, the concrete is fine aggregate concrete, and the fine aggregate concrete can provide strong binding power.

The specific construction method comprises the following steps:

(1) referring to fig. 2 and 3, a concrete protective layer on the upper surface of a floor slab main body 100 is chiseled to form a square positioning counter bore 102, the width of the chiseled positioning counter bore 102 is larger than the distance between adjacent reinforcing steel bars in a reinforcing bar net 103 in the floor slab main body 100, and the depth of the positioning counter bore 102 is equal to the distance from the upper surface of the floor slab main body 100 to the surface of the reinforcing bar net 103, so that the reinforcing bar net 103 on the upper layer of the floor slab main body 100 is conveniently exposed; after the reinforcing bar net 103 is cut and exposed, the position for punching the fixing through hole 101 is determined at the arrangement gap of the reinforcing bar net 103, and the fixing through hole 101 is punched in the positioning counter bore 102 by using a punching device such as a drilling machine. The formed positioning counter bore 102 is beneficial to quick positioning of the fixing through hole 101, construction efficiency is improved, and the reinforcing rib net 103 is prevented from being damaged when the fixing through hole 101 is formed.

(2) Referring to fig. 5, the studs 2101 are welded to the surface of each of the reinforcing plates 201a corresponding to the distribution positions of the fixing through holes 101 to support each of the reinforcing plates 201a, and the studs 2101 are inserted into the fixing through holes 101 in a one-to-one correspondence from below corresponding to the positions of the fixing through holes 101 of the floor slab body 100, so that the reinforcing plates 201a are closely arranged on the lower surface of the floor slab body 100. After the plurality of reinforcing plates 201a are vertically and horizontally adhered to the lower surface of the floor slab body 100 to form the reinforcing plate group 201, the spiral stirrup 2102 is fitted to the stud 2101.

(3) Since the floor slab body 100 has a certain deflection deformation before the reinforcement, after the reinforcement plate group 201 is installed, each reinforcement plate 201a needs to be lifted up, so that the floor slab body is restored to a flat state when the initial construction is completed, and at the same time, the floor slab body is partially pre-bent upward, thereby pre-stressing the plurality of reinforcement plates 201a arranged in a crisscross manner.

(4) After the lifting installation of each reinforcing plate 201a is completed, fine aggregate concrete is poured from the upper positioning counter bore 102 and the fixing through hole 101 of the floor slab main body 100 until the fine aggregate concrete is flush with the surface of the floor slab main body 100, and the reinforcing plate group 201 and the floor slab main body 100 form a stressed whole after the concrete is solidified.

In this embodiment, the reinforcing plate group 201 is installed from below, and on one hand, the reinforcing plate group 201 arranged on the lower surface of the floor slab main body 100 can bear the load of the floor slab and reinforce the floor slab; on the other hand, the reinforcing plate group 201 also serves as a concrete form by preventing the adhesive body 300 from falling off from the lower surface of the floor slab body 100 when concrete as the adhesive body 300 is poured.

The construction difficulty is lower, the operation is more convenient, and the operation steps are fewer, so that the construction period is directly shortened, and the labor cost is further reduced; the used raw materials are less, the price is low, and the material cost is reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A bend-resistant reinforced floor structure, comprising:

2. The moment-resistant reinforced floor structure according to claim 1, wherein the reinforcing body comprises a reinforcing plate group arranged in a cross in the same plane, the reinforcing plate group being fixed to a middle portion of the lower surface of the floor slab body.

3. The moment-resistant, reinforced floor structure according to claim 2, wherein the set of reinforcing plates comprises a plurality of criss-crossing reinforcing plates.

4. The moment-resistant, reinforced floor structure according to claim 3, wherein the shear connectors comprise studs provided on the surface of the reinforcement.

5. The moment-resistant reinforced floor structure according to claim 4, wherein the shear connector further comprises a helical stirrup, the helical stirrup being sleeved over the peg.

6. The moment-resistant reinforced floor structure according to claim 5, wherein the diameter of the helical stirrups is 10mm-20mm greater than the diameter of the largest cross-sectional portion of the studs.

7. The moment-resistant reinforced floor structure according to claim 4, wherein the length of the peg is 70-80% of the thickness of the floor body.

8. The moment-resistant reinforced floor structure according to claim 4, wherein a plurality of said pegs are provided on each of said reinforcing plates, and a plurality of said pegs are respectively inserted into a plurality of said fixing through holes of said floor body surface corresponding to positions of said pegs.

9. The moment-resistant reinforced floor structure according to claim 4, wherein the aperture of the fixing through-hole is 40-60 mm larger than the diameter of the largest cross-sectional portion of the peg.

10. The moment-resistant, reinforced floor structure according to claim 1, further comprising a positioning counter bore open in the upper surface of the floor body for exposing a web of reinforcing bars in the floor body to position the securing through-holes.