CN219671803U

CN219671803U - Continuous beam type double-beam plate superposed floor system

Info

Publication number: CN219671803U
Application number: CN202320214049.1U
Authority: CN
Inventors: 杨峰; 俞锋波; 耿俊迪; 项珺剑
Original assignee: Ningbo Excellent Building Technology Co ltd
Current assignee: Ningbo Excellent Building Technology Co ltd
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2023-09-12
Anticipated expiration: 2033-02-08

Abstract

The utility model provides a continuous beam type double beam slab coincide superstructure, includes U-shaped steel girder, double beam precast slab and post-cast concrete coincide layer, U-shaped steel girder includes double web, top flange, bottom plate, double web comprises two vertical steel sheets, double beam precast slab includes dull and stereotyped, rib roof beam, dull and stereotyped package rubbing board concrete body, reinforcing bar net piece and truss reinforcing bar, double beam precast slab rest in on the U-shaped steel girder, post-cast concrete coincide layer includes the interior concrete of U-shaped steel girder and double beam slab upper strata concrete, post-cast concrete coincide layer U-shaped steel composite beam with double beam precast slab passes through the interior concrete of U-shaped steel girder with double beam slab upper strata concrete is pour as an organic wholely. The double-beam plate is placed on the U-shaped steel composite beam, the structure is simple, the continuous beam plate can be formed after concrete is poured, the fireproof performance is good, and the integrity of the double-beam precast slab, the U-shaped steel main beam and post-pouring concrete is good after pouring.

Description

Continuous beam type double-beam plate superposed floor system

Technical Field

The utility model relates to the field of building structures, in particular to a continuous beam type double-beam plate superposed floor system.

Background

In the traditional floor system using double T plates as floor slabs, the floor system has the characteristics of large span, good stress performance and the like, but the rib section width is small, the rib height is small, stirrups are usually single-limb stirrups, the number of steel strands in the ribs is small, the inverted arch is large, and the floor system can only be used for floors with small live load, and the application range is narrow. Meanwhile, the corresponding main beams for placing the double T plates are generally special-shaped concrete beams with the lugs, so that the manufacturing is difficult and the cost is high. A combined floor system designed according to a continuous beam for a large live load floor is not shown.

Disclosure of Invention

The technical problem to be solved by the utility model is to overcome the defects in the prior art and provide the continuous beam type double-beam plate superposed floor system.

The utility model provides a continuous beam type double beam plate superposed floor system, which comprises a U-shaped steel girder, a double beam precast slab and a post-cast concrete superposed layer, wherein the U-shaped steel girder comprises a double web plate, an upper flange and a bottom plate, the double web plate consists of two vertical steel plates, the lower ends of the two vertical steel plates are welded with the bottom plate to form a U-shaped cavity, the upper ends of the two vertical steel plates are respectively welded with the upper flange, drawknot pieces welded between the two upper flanges at a certain distance in the longitudinal direction are welded, the outer side surface of the double web plate is welded with a plurality of U-shaped steel corbels, the double beam precast slab comprises a flat plate and a rib beam, the flat plate comprises a slab concrete body, a reinforcing mesh and truss reinforcing steel bars, the truss reinforcing steel bars are buried at two ends of the slab concrete body in the longitudinal direction perpendicular to the slab concrete body, the rib beam comprises an upper row of prestressed steel strands, a lower row of prestressed steel strands, stirrups and a beam concrete body, wherein the upper row of prestressed steel strands and the lower row of prestressed steel strands are respectively buried in the upper part and the lower part of the beam concrete, the stirrups are buried around the beam concrete and penetrate through the slab concrete body and extend out of the upper surface of the slab concrete body by a certain height, the beam concrete body and the slab concrete body are integrally cast, the double-beam precast slab is placed on the U-shaped steel bracket, the post-cast concrete superposed layer comprises concrete in the U-shaped steel girder, upper layer concrete of the double-beam slab, and concrete between the beam end of the double-beam precast slab and the web of the U-shaped steel girder, and the post-cast concrete superposed layer, the U-shaped steel girder and the double-beam precast slab are integrally cast.

At least one transverse truss is arranged between the rib beams of the double-beam precast slab.

The double webs are provided with through holes at the steel corbels.

The inner side of the U-shaped steel main beam is buried with the prestress steel strands which are arranged in a curve mode.

And the post-pouring concrete superposed layer is buried with a reinforcing steel mesh.

Negative moment steel bars are buried in the post-pouring concrete superposed layers at the upper parts of the rib beams of the adjacent double-beam precast slabs of the U-shaped steel main beams, are arranged parallel to the rib beams and span the U-shaped steel main beams to overlap the rib beams for a certain length.

And the rib beams of the double-beam precast slab are provided with door-shaped frame vertical stirrups in the post-pouring concrete superposed layer.

The double-beam precast slab is provided with S-shaped ribs at the joints.

Compared with the prior art, the continuous beam type double-beam plate superposed floor system provided by the utility model has the following advantages:

1. the double beam plate is placed on the U-shaped steel main beam, the structure is simple, a continuous beam plate can be formed after concrete is poured, and the fireproof performance is good;

2. the integrity of the double-beam precast slab and the U-shaped steel main beam and post-cast concrete after pouring is good;

3. the transverse trusses can cooperatively deform and ensure the out-of-plane stability of the large-span rib beams.

Drawings

FIG. 1 is a schematic view of a node of a stacked floor system according to the present utility model.

Fig. 2 is a plan view of a steel main beam of the laminated floor system of the present utility model.

FIG. 3 is a schematic view of a double beam plate of a laminated floor system of the present utility model.

Fig. 4 is a schematic view of truss installation of the laminated floor system of the present utility model.

Fig. 5 is a side view of a double beam slab casting of a superimposed floor system of the present utility model.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Referring to fig. 1 to 5, in the embodiment of the continuous beam type double beam slab superimposed floor system provided by the utility model, the continuous beam type double beam slab superimposed floor system comprises a U-shaped steel main beam 1, a double beam precast slab 2 and a post-cast concrete superimposed layer 3, wherein the U-shaped steel main beam 1 comprises a double web 11, an upper flange 12 and a bottom plate 13, the double web 11 is composed of two vertical steel plates, the lower ends of the two vertical steel plates are welded with the bottom plate 13 to form a U-shaped cavity 17, the upper ends are respectively welded with the upper flange 12, drawknot pieces 14 are welded between the two upper flanges 12 at a certain distance longitudinally, the outer side surface of the double web 11 is welded with a plurality of U-shaped steel corbels 15, the double beam precast slab comprises a slab 21 and a rib beam 22, the slab 21 comprises a slab concrete body 211, a steel bar net 212 and truss steel bars 213, the truss steel bars 213 are buried at two ends of the slab concrete body 211 perpendicularly to the length direction of the slab concrete body 211, the rib beam 22 is two, arrange in parallel in the long direction downside of dull and stereotyped 21, rib beam 22 includes upper row prestressing steel strand 221, lower row prestressing steel strand 222, stirrup 223 and beam concrete body 224, upper row prestressing steel strand 221 with lower row prestressing steel strand 222 buries respectively in beam concrete body 224 upper portion and lower part, stirrup 223 buries around beam concrete body 224 and passes slab concrete body 211 and stretches out its upper surface certain height, beam concrete body 224 with slab concrete body 211 integrally waters, double-beam precast slab 2 rest on U-shaped steel bracket 15, post-cast concrete coincide layer 3 includes the concrete 31 in the U-shaped steel girder, double-beam slab upper surface layer concrete 32 and the concrete 33 between double-beam precast slab beam end and the U-shaped steel girder web, post-cast coincide layer 3, the U-shaped steel main beam 1 and the double-beam precast slab 2 are integrally cast. The double web plate, the upper flange and the bottom plate of the U-shaped steel girder 1 form a U-shaped cavity together for resisting the lateral pressure of cast-in-situ concrete, and meanwhile, the U-shaped steel girder is used as a stress member in the using stage, so that the U-shaped steel girder is multiple in purposes, and the upper flange is pulled by the drawknot member to resist the tensile force. The truss steel bars 213 distributed at two ends in the double-beam precast slab 2 are beneficial to improving the transverse rigidity of the components, the upper row of prestressed steel strands 221 are used for balancing the prestress of the lower row of prestressed steel strands 222, so that the components are effectively prevented from arching upwards, the truss steel bars 213 and the stirrups 223 extend upwards to a certain height, and the shearing resistance of the overlapped surface is effectively improved. The post-cast concrete superposed layer 3 integrally casts the U-shaped steel main beam 1 and the double-beam precast slab 2 into a whole, and the integrity is good.

Referring to fig. 4, in an embodiment of the continuous beam type double beam slab composite floor system according to the present utility model, at least one transverse truss 4 is disposed between the rib beams 22 of the double beam precast slab 2. The transverse truss 4 plays a role in deformation coordination and improves the lateral stability of the beam.

Referring to fig. 2, in an embodiment of the present utility model, a continuous beam type double beam plate laminated floor system is provided, wherein the double web plate at the inner lower part of the U-shaped steel bracket 15 is provided with a through hole 16. The U-shaped steel bracket 15 is used for placing the double beam plates, the through holes 16 can enable concrete to flow into the U-shaped steel bracket from the U-shaped steel main beam, the integrity of the bracket is improved, and the concrete secondary beams placed at the position are facilitated to form a continuous beam.

Referring to fig. 2, in an embodiment of the continuous beam double beam slab composite floor system according to the present utility model, the U-shaped steel main beam is embedded with the pre-stressed steel strands 18 arranged in a curve inside. The prestressed reinforcement 18 is beneficial to improving the bearing capacity of the precast beam

Referring to fig. 2, in an embodiment of the continuous beam type double beam slab composite floor system according to the present utility model, the post-cast concrete composite layer 3 is embedded with a reinforcing mesh 34. The shearing resistance of the overlapped surface is improved.

Referring to fig. 1 and 3, in an embodiment of a continuous beam type double beam slab laminated floor system provided by the present utility model, a hogging moment reinforcing steel bar 122 is buried in the post-cast concrete laminated layer 3 at the upper part of the rib beam 22 of the U-shaped steel main beam 1 adjacent to the double beam precast slab 2, the hogging moment reinforcing steel bar 122 is arranged parallel to the rib beam 22, and is overlapped with the rib beam 22 for a certain length across the U-shaped steel main beam 1, and a door-shaped vertical stirrup 124 is arranged in the post-cast concrete laminated layer 3 by the rib beam 22 of the double beam precast slab 2. The hogging moment steel bars 122 are used to resist the end bending moment, and the portal frame stirrup 124 and the stirrup 223 together form a closed hoop.

Referring to fig. 1 and 5, in an embodiment of a continuous beam type double beam slab composite floor system according to the present utility model, the double beam precast slab 2 is provided with S-shaped ribs 224 at the joints. The S-shaped ribs 224 can act as crack resistance.

In the present utility model, all "a certain height, a certain distance" means a length necessary for satisfying design requirements, that is, a length necessary for adapting to connection and strength requirements, which is clear to a person skilled in the art, and is set as required.

Claims

1. A continuous beam type double beam plate superposed floor system comprises a U-shaped steel main beam, a double beam precast slab and a post-cast concrete superposed layer, and is characterized in that

The U-shaped steel girder comprises a double web plate, an upper flange and a bottom plate, wherein the double web plate consists of two vertical steel plates, the lower ends of the two vertical steel plates are welded with the bottom plate to form a U-shaped cavity, the upper ends of the two vertical steel plates are respectively welded with the upper flanges, drawknot pieces welded between the two upper flanges at a certain distance in the longitudinal direction are welded on the outer side surface of the double web plate, a plurality of U-shaped steel corbels are welded on the outer side surface of the double web plate,

the double-beam precast slab comprises a slab and two rib beams, wherein the slab comprises a slab concrete body, a reinforcing mesh and truss reinforcing steel bars, the truss reinforcing steel bars are perpendicular to the long direction of the slab concrete body and embedded at two ends of the slab concrete body, the two rib beams are arranged in parallel at the lower side of the slab in the long direction, the rib beams comprise an upper row of prestressed steel strands, a lower row of prestressed steel strands, stirrups and a beam concrete body, the upper row of prestressed steel strands and the lower row of prestressed steel strands are embedded at the upper part and the lower part of the beam concrete respectively, the stirrups are embedded around the beam concrete, penetrate through the slab concrete body and extend out of the upper surface of the slab concrete body by a certain height, the beam concrete body and the slab concrete body are integrally cast, the double-beam precast slab is placed on the U-shaped steel corbels,

the post-cast concrete superposed layer comprises a U-shaped steel girder inner concrete, a double-girder plate upper layer concrete and a concrete between the beam end of the double-girder precast slab and a web plate of the U-shaped steel girder, and the post-cast concrete superposed layer, the U-shaped steel girder and the double-girder precast slab are integrally cast.

2. A continuous beam double beam slab overlapping floor system as in claim 1, wherein at least one transverse truss is disposed between said ribs of said double beam precast slab.

3. A continuous beam double beam plate superposed floor system according to claim 1, wherein the double web of the lower part of the U-shaped steel corbel is provided with a through hole.

4. The continuous beam double beam plate superposed floor system according to claim 1, wherein the inner side of the U-shaped steel main beam is buried with prestress steel strands which are arranged in a curve.

5. A continuous beam double beam slab composite floor according to claim 1, wherein said post-cast concrete composite layer is embedded with reinforcing mesh.

6. The continuous beam type double beam slab overlapping floor system as claimed in claim 1, wherein the rib beam upper parts of the adjacent double beam precast slabs of the U-shaped steel main beams are buried with hogging moment steel bars in the post-cast concrete overlapping layer, the hogging moment steel bars are arranged parallel to the rib beams, and overlap with the rib beams for a certain length across the U-shaped steel main beams.

7. A continuous beam double beam slab overlapping floor system as claimed in claim 1, wherein said rib beams of said double beam precast slab are provided with portal frame riser stirrups in said post-cast concrete overlapping layer.

8. A continuous beam double beam slab composite floor system according to claim 1, wherein said double beam precast slab is provided with S-shaped ribs at the joints.