CN207063269U - The beam-column node structure of assembled floor - Google Patents

Abstract

A beam-column joint structure of a prefabricated floor slab, the truss reinforced concrete laminate includes a prefabricated layer and a laminated layer, the prefabricated layer includes a truss reinforcement mesh and a prefabricated concrete layer; the truss reinforcement mesh is mainly composed of upper and lower chord unit steel bars and web bar unit steel bars Composition; the prefabricated concrete layer wraps the lower parts of multiple lower chord unit steel bars and multiple web bar unit steel bars inside; the laminated layer includes a cast-in-place concrete layer and upper additional bars, and the cast-in-place concrete layer wraps the middle additional bars and the upper additional bars The upper parts of the tendons, upper chord unit steel bars and web bar unit steel bars are covered inside; the building surface layer covers the upper flange of the H-shaped steel beam inside. In the node structure, the clear height space of the floor can be effectively saved, and the installation efficiency can be effectively improved. The overall height of the steel beams and slabs in this node structure is small, which can effectively reduce the occupation of the clear height space of the floor. At the same time, fewer supporting devices are required for on-site installation, which is more convenient for on-site installation and operation, and can effectively improve on-site installation efficiency. .

Description

Beam-column joint structure of prefabricated floor slabs

technical field

The utility model belongs to the technical field of construction engineering structures, relates to beam-column joints, in particular to a beam-column joint structure of an assembled floor slab.

Background technique

As the main component of the building structure, the technology of the floor slab has a great influence on the quality, cost and construction period of the project. At present, floor slabs mainly include cast-in-place reinforced concrete slabs, concrete prefabricated slabs, profiled steel plate-concrete composite slabs and laminated slabs. Among them, although the cast-in-place reinforced concrete floor slab has the advantages of good integrity, it requires a large number of complex on-site formwork engineering, steel reinforcement engineering and concrete engineering, which brings about slow construction speed, long construction period, high labor cost, and difficult control of construction quality. And so on, it is difficult to realize industrialized production, and it is also not conducive to energy saving and environmental protection. Although the construction speed of the prefabricated concrete slab is fast, the overall stiffness of the slab is poor, the earthquake damage is serious, and there are problems such as anti-seepage and anti-leakage, which seriously limit its application. Although the profiled steel plate-concrete composite floor has high overall rigidity and does not require support formwork, the cost is high. The profiled steel plate needs to be treated with fire protection, and the bottom surface is uneven, so it often needs to be treated as a suspended ceiling. Laminated slabs integrate the advantages of cast-in-place slabs and prefabricated slabs, and have outstanding advantages when applied to floor structures. However, the existing beam-column joints of laminated slabs have the following disadvantages: 1. In order to ensure the load-bearing strength and on-site assembly requirements, the steel beam in the beam-column joint structure is directly connected to the lower end face of the laminated slab, and the overall height of the beam-column joint is high, which will occupy more floor clear height; 2. When the connection is fixed, more supporting devices are required, which will affect the cost of the project and slow down the construction speed on site; 3. In order to be in the laminated slab.

Contents of the invention

In view of the problems existing in the above-mentioned prior art, the utility model provides a beam-column joint structure of an assembled floor slab. The overall height of the steel beam in the joint structure is small, which can effectively reduce the occupation of the clear height space of the floor. At the same time, On-site installation requires fewer supporting devices, which is more convenient for on-site installation and operation, and can effectively improve on-site installation efficiency.

In order to achieve the above purpose, the utility model provides a beam-column node structure of an assembled floor, including building surface, truss reinforced concrete laminated slab and H-shaped steel beam, truss reinforced concrete laminated slab includes prefabricated layer and laminated layer, so The prefabricated layer includes a truss reinforcement mesh and a prefabricated concrete layer; the truss reinforcement mesh is mainly composed of a plurality of interconnected lower chord unit reinforcements, a plurality of interconnected upper chord unit reinforcements, and a plurality of webs connecting the lower chord unit reinforcements and the upper chord unit reinforcements It is composed of unit steel bars and multiple middle additional bars located in the middle of the web unit steel bars and fixedly connected with multiple web unit steel bars; the prefabricated concrete layer covers the lower parts of multiple lower chord unit steel bars and multiple web unit steel bars Inside it; a channel is reserved in the middle of the prefabricated concrete layer; the laminated layer is located on the upper part of the prefabricated layer, which includes the cast-in-situ concrete layer and the upper additional reinforcement, and the upper additional reinforcement is at the same height as multiple upper chord unit reinforcement bars, now The poured concrete layer wraps the upper additional reinforcement, the upper part of the upper chord unit reinforcement and the upper part of the web unit reinforcement and the middle additional reinforcement inside it, and the position corresponding to the channel of the cast-in-place concrete layer has a downward protrusion and extends below the prefabricated concrete layer. The convex part, the contact surface of the cast-in-place concrete layer and the prefabricated concrete layer are all connected by pouring; the H-shaped steel beam is composed of the upper flange of the H-shaped steel beam, the web of the H-shaped steel beam and the lower flange of the H-shaped steel beam. The web of the H-shaped steel beam is provided with a plurality of openings at equal intervals along its length; the upper part of the H-shaped steel beam is buried in the interior of the truss reinforced concrete laminate, and the upper flange of the H-shaped steel beam is buried in the middle of the building surface , and the lower flange of the H-shaped steel beam is connected to the lower end surface of the convex part of the cast-in-place concrete layer; the additional ribs in the middle, the upper additional ribs in the laminated layer and the cast-in-place concrete layer are all set through the opening.

In this technical scheme, the upper part of the H-shaped steel beam is buried inside the truss reinforced concrete composite slab, and the upper flange of the H-shaped steel beam is buried in the middle of the building surface, so that not only can the joints have good bearing strength and connection strength, and can make the height of the H-shaped steel beam outside the truss reinforced concrete composite slab smaller. Through the treatment of this node, the clear height of the floor occupied by the steel beam can be effectively saved, and the clear height of the floor can be saved. The area, which can increase the net height of the floor, or increase the number of floors under a certain building height. At the same time, since the truss reinforced concrete composite slab can also be used as a formwork, the formwork can be effectively saved, which not only saves the engineering cost, but also makes the on-site installation process more convenient and can effectively increase the construction efficiency. Among them, the setting of the cast-in-place concrete layer can facilitate the burying of equipment line pipes during installation. Compared with the prefabricated assembly type, it can avoid environmental pollution problems caused by on-site slotting, and at the same time, it can also make the construction effect more beautiful. Since a part of the steel girder extends into the channel and is covered by concrete, the cost of anticorrosion and fireproof treatment of the covered steel girder can be reduced, and the engineering cost can be effectively saved.

In order to facilitate the hoisting of the truss reinforced concrete composite slab, the size of the upper flange of the H-shaped steel beam is smaller than the size of the lower flange of the H-shaped steel beam.

In order to prevent grout leakage during pouring, it also includes two vertical formworks. The left end and the right end of the upper part of the lower flange of the H-shaped steel beam are abutted against each other, and the two formworks are respectively arranged on the left and right sides of the convex part of the cast-in-place concrete layer.

In order to improve the pouring effect and help reduce costs, the formwork is a wooden module.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a schematic diagram of the structure of H-shaped steel beams in the utility model.

In the figure: 1. Building surface layer, 2. Truss reinforced concrete laminated slab, 3. H-shaped steel beam, 4. Prefabricated layer, 5. Laminated layer, 6. Precast concrete layer, 7. Cast-in-place concrete layer, 8. Truss reinforcement mesh, 9, upper chord unit reinforcement, 10, web member reinforcement, 11, lower chord unit reinforcement, 12, middle additional reinforcement, 13, upper additional reinforcement, 14, formwork, 15, opening, 16, under H-beam Flange, 17, web plate of H-shaped steel beam, 18, upper flange of H-shaped steel beam, 19, convex part.

Detailed ways

The utility model will be further described below.

As shown in Figures 1 and 2, a beam-column joint structure of a prefabricated floor slab includes a building surface 1, a truss reinforced concrete composite slab 2 and an H-shaped steel beam 3, and the truss reinforced concrete composite slab 2 includes a prefabricated layer 4 and The laminated layer 5, the prefabricated layer 4 includes a truss reinforcement mesh 8 and a prefabricated concrete layer 6; the truss reinforcement mesh 8 is mainly composed of a plurality of interconnected lower chord unit reinforcement bars 11, a plurality of interconnected upper chord unit reinforcement bars 9, and a plurality of interconnected upper chord unit reinforcement bars 9. A web unit reinforcement 10 connecting the lower chord unit reinforcement 11 and the upper chord unit reinforcement 9 and a plurality of middle additional reinforcements 12 located in the middle of the web unit reinforcement 10 and fixedly connected with a plurality of web unit reinforcement bars 10; the prefabricated concrete Layer 6 wraps the lower part of multiple lower chord unit steel bars 11 and multiple web member steel bars 10 inside; the middle part of prefabricated concrete layer 6 has a channel reserved;

The superimposed layer 5 is located at the top of the prefabricated layer 4, and it includes a cast-in-place concrete layer 7 and an upper additional reinforcement 13. The upper additional reinforcement 13 is at the same height as a plurality of upper chord unit reinforcement bars 9, and the cast-in-place concrete layer 7 connects the upper additional reinforcement. 13. The upper and middle additional bars 12 of the upper chord unit steel bar 9 and the web bar unit steel bar 10 are covered inside, and the position corresponding to the channel of the cast-in-place concrete layer 7 has a convex structure that protrudes downward and extends below the precast concrete layer 6. Part 19, the contact surfaces of the cast-in-place concrete layer 7 and the prefabricated concrete layer 6 are all connected by pouring;

The H-shaped steel beam 3 is composed of an H-shaped steel beam upper flange 18, an H-shaped steel beam web 17 and an H-shaped steel beam lower flange 16, and the H-shaped steel beam web 17 is set at equal intervals along its length direction. There are a plurality of openings 15, and the distance between the openings 15 is 200mm; the upper part of the H-shaped steel beam 3 is embedded in the interior of the truss reinforced concrete laminated slab 2, and the upper flange 18 of the H-shaped steel beam is embedded in the middle of the building surface layer 1 , and the lower flange 16 of the H-shaped steel beam is connected to the lower end surface of the convex part 19 of the cast-in-place concrete layer 7;

The middle additional reinforcement 12 , the upper additional reinforcement 13 in the laminated layer 5 and the cast-in-place concrete layer 7 are all arranged through the hole 15 .

The upper part of the H-shaped steel beam is buried inside the truss reinforced concrete laminated slab, and the upper flange of the H-shaped steel beam is buried in the middle of the building surface. In this way, not only can the nodes have good bearing strength and connection strength, but also can The height of the part of the H-shaped steel beam outside the truss-reinforced concrete laminated slab is relatively small. Through the treatment of this joint, the clear height of the floor occupied by the steel beam can be effectively saved, and the area of the clear floor height can be saved, which can increase Floor net height, or increase the number of floors under a certain building height. At the same time, since the truss reinforced concrete composite slab can also be used as a formwork, the formwork can be effectively saved, which not only saves the engineering cost, but also makes the on-site installation process more convenient and can effectively increase the construction efficiency. Among them, the setting of the cast-in-place concrete layer can facilitate the burying of equipment line pipes during installation. Compared with the prefabricated assembly type, it can avoid environmental pollution problems caused by on-site slotting, and at the same time, it can also make the construction effect more beautiful. Since a part of the steel girder extends into the channel and is covered by concrete, the cost of anticorrosion and fireproof treatment of the covered steel girder can be reduced, and the engineering cost can be effectively saved.

In order to facilitate the hoisting of the truss reinforced concrete composite slab, the size of the upper flange 18 of the H-shaped steel beam is smaller than the size of the lower flange 16 of the H-shaped steel beam.

In order to prevent grout leakage during pouring, it also includes two vertically arranged templates 14, the upper ends of the two templates 14 abut against the lower end faces of the prefabricated concrete layer 6 on both sides of the H-shaped steel beam web 17 respectively, and the two templates The lower ends of 14 abut against the upper left and right ends of the lower flange 16 of the H-shaped steel beam respectively, and the two formworks 14 are arranged on the left and right sides of the convex part of the cast-in-place concrete layer 7 respectively.

In order to improve the pouring effect and help reduce costs, the template 14 is a wooden module.

During use, after the H-shaped steel beam 3 is assembled, the wooden formwork 14 on both sides is assembled, and then the prefabricated layer 4 of the truss reinforced concrete laminate 2 is hoisted on site and assembled on the upper ends of the two wooden formworks 14, and the The upper additional ribs 12 and the middle additional ribs 13 are bound. After the binding is completed, the cast-in-place concrete layer 7 is poured, and finally the building surface layer 1 is poured.

Claims (4)

1. a kind of beam-column node structure of assembled floor, including building coats（1）With truss bars concrete folding plate（2）, Characterized in that, also include H profile steel beam（3）, truss bars concrete folding plate（2）Including preformed layer（4）And overlapping layers（5）, The preformed layer（4）Including truss bars net（8）And concrete layer（6）；The truss bars net（8）Mainly by multiple phases The lower edge unit reinforcing bar to connect（11）, multiple interconnections the unit reinforcing bar that winds up（9）, it is multiple connection lower edge unit reinforcing bar （11）With the unit reinforcing bar that winds up（9）Web member unit reinforcing bar（10）And positioned at web member unit reinforcing bar（10）Middle part and with multiple abdomens Bar unit reinforcing bar（10）The multiple middle part additional muscles being fixedly connected（12）Composition；The concrete layer（6）By multiple lower edges Unit reinforcing bar（11）With multiple web member unit reinforcing bars（10）Bottom be coated on inside it；Concrete layer（6）Middle part it is pre- Leave passage；

The overlapping layers（5）Positioned at preformed layer（4）Top, it includes cast-in-place concrete layer（7）With top additional muscle（13）, it is described Top additional muscle（13）With multiple unit reinforcing bars that wind up（9）Sustained height, cast-in-place concrete layer（7）By top additional muscle（13）、 Wind up unit reinforcing bar（9）With web member unit reinforcing bar（10）Top and middle part additional muscle（12）It is coated on inside it, and it is cast-in-place Concrete layer（7）The position of respective channel has downwardly projecting and extends to concrete layer（6）The convex portion (19) of lower section, it is existing Pouring concrete layer（7）With concrete layer（6）Contact surface pass through pour into a mould connection；

The H profile steel beam（3）It is made up of H profile steel beam top flange (18), H profile steel web (17) and H profile steel lower flange of girder edge (16), The H profile steel web (17) equally spaced offers multiple holes (15) along its length；The H profile steel beam（3）It is upper Portion is embedded in truss bars concrete folding plate（2）Inside, and H profile steel beam top flange (18) is embedded in building coats（1）'s Middle part, and H profile steel lower flange of girder edge (16) and cast-in-place concrete layer（7）Convex portion (19) lower surface connection；

The middle part additional muscle（12）, overlapping layers（5）In top additional muscle（13）And cast-in-place concrete layer（7）Both pass through described Set to hole (15).

A kind of 2. beam-column node structure of assembled floor according to claim 1, it is characterised in that the H profile steel beam The size of top flange (18) is less than the size of H profile steel lower flange of girder edge (16).

3. the beam-column node structure of a kind of assembled floor according to claim 1 or 2, it is characterised in that also including two The individual template being vertically arranged（14）, two templates（14）Upper end respectively with positioned at the prefabricated mixed of H profile steel web (17) both sides Solidifying soil layer（6）Lower surface abut against, two templates（14）Lower end respectively with H profile steel lower flange of girder edge (16) upper left end and the right side End abuts against, and two templates（14）Cast-in-place concrete layer is snugly arranged at respectively（7）Convex portion the left and right sides.

A kind of 4. beam-column node structure of assembled floor according to claim 3, it is characterised in that the template（14） For wooden model block.