CN111962767A - Web plate open-hole section steel partially-wrapped concrete composite beam and construction method thereof - Google Patents

Abstract

The invention is suitable for the technical field of construction engineering, and provides a concrete composite beam partially covered by a web opening-shaped steel; it includes a shaped steel, and a plurality of A through holes are arranged in an array on the web; The upper array is provided with a plurality of B through holes corresponding to the A through holes, and the A through holes are communicated with the B through holes; the cast-in-place concrete flange plate is arranged on the profile steel and the precast concrete; wherein, the steel structure spans the prefabricated Concrete and cast-in-place concrete flange plates are arranged; they are arranged on the upper connecting plate on the upper part of the section steel, and the upper connecting plate is provided with gaps in an array; a plurality of erecting bars are arranged through the upper connecting plate, and the plurality of erecting bars are on both sides. 7-shaped connecting rods are respectively provided, the lower part of the 7-shaped connecting rod is arranged inside the precast concrete, the upper part of the 7-shaped connecting rod is arranged inside the cast-in-place concrete slab, and several pegs are arranged on the profile steel web.

Description

A kind of concrete composite beam with open-hole section steel part of the web and its construction method

technical field

The invention relates to the technical field of construction engineering, in particular to a concrete composite beam partially covered by a web opening section steel and a construction method thereof.

Background technique

In modern reinforced concrete structures, the structural form of beams used in the early days is reinforced concrete beams, which are mainly formed by binding steel bars at the construction site and supporting the formwork before pouring concrete for curing. It has the advantages of easy acquisition, good integrity and moldability, and high rigidity. But it also has many shortcomings, such as: long construction period, high cost, self-heavy, poor crack resistance in use.

With the development of building construction technology, the appearance of reinforced concrete beams has improved the performance of the original reinforced concrete beams. With the emergence of prefabricated concrete beams, compared with cast-in-place concrete structures, prefabricated concrete beams can realize industrial production, greatly shorten the construction period, and save construction templates and materials to protect the environment. However, due to the limitation of the beam height and the need to pass pipelines under the beam, the floor height of the building is limited. Therefore, the above-mentioned technical problem is solved by a construction method of a concrete composite beam partially covered by a web opening section steel.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a concrete composite beam with a web opening section and a construction method thereof, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical scheme:

The utility model relates to a concrete composite beam partially covered with open-hole profiled steel on a web, comprising profiled steel, and a plurality of A through holes are arranged in an array on the web;

The prefabricated concrete arranged inside the section steel, and the prefabricated concrete is provided with a plurality of B through holes corresponding to the A through holes, and the A through holes are communicated with the B through holes;

Cast-in-place concrete flange plates set on profiled steel and precast concrete;

Among them, the steel structure is set across the precast concrete and cast-in-place concrete flange plates;

It is arranged on the upper connecting plate on the upper part of the section steel, and the upper connecting plate is arrayed with gaps;

A plurality of erecting bars are arranged through the upper connecting plate, and two sides of the plurality of erecting bars are respectively provided with a 7-shaped connecting rod, the lower part of the 7-shaped connecting rod is arranged inside the precast concrete, and the upper part of the 7-shaped connecting rod is arranged Inside the cast-in-place concrete slab;

Several studs are arranged on the web of the profiled steel.

As a further solution of the present invention: the profiled steel is an I-beam, the width of the upper flange is smaller than the width of the lower flange, and A through hole is provided on the web of the profiled steel.

As a further solution of the present invention, the number of the 7-shaped connecting rods and the studs are the same, and A through holes are arranged at intervals between the plurality of 7-shaped connecting rods.

As a further solution of the present invention, an A hook is provided on the upper part of the semi-closed stirrup, and the A hook is in contact with the profiled steel.

As a further solution of the present invention: B hooks are also provided at both ends of the erecting bars.

As a further solution of the present invention, a support pipe is arranged in the A through hole on the profile steel, and the support pipe is arranged through the precast concrete, and the support pipe is arranged in the B through hole.

As a further solution of the present invention: both ends of the support pipe are flush with both ends of the precast concrete.

As a further solution of the present invention: the support pipe is a PVC pipe.

As a further solution of the present invention: the outer edges on both sides of the precast concrete are flush with the lower flange edge of the profiled steel.

The present invention provides the following another technical scheme:

A construction method for a concrete composite beam partially covered by a web opening section steel, comprising the following steps:

Put the processed section steel in place in the prefabrication yard, fix the upper connecting plate on the top surface of the section steel upper flange, position and weld the stud and 7-shaped connecting rod on the section steel web and the upper and lower flanges, and place the PVC pipe on the section steel Make the left and right edges flush with the edge of the lower flange of the section steel, place the erecting bars on the top surface of the upper flange of the section steel and arrange them according to the design spacing, and set them through the upper connecting plate, support the formwork and pour the prefabrication Concrete completes the prefabricated part, forming a prefabricated element;

Transport the prefabricated components to the construction site and hoist them in place, and reasonably connect the prefabricated components to the columns or main beams;

Formwork and pour cast-in-place concrete flange slabs over precast concrete.

Compared with the prior art, the beneficial effect of the present invention is: in the prefabrication factory, the section steel is now produced, the upper connecting plate and the stud are welded on the section steel respectively, the erecting bars are arranged through the upper connecting plate, and the 7-shaped connecting rod is arranged. The bottom is fixed and welded to the bottom of the section steel; then precast concrete is poured in the precast yard, and the pouring of the cast-in-place concrete flange plate is carried out on site; Reduced, the construction efficiency will be improved; at the same time, the A through hole is set on the section steel, and the B through hole is reserved when the precast concrete is poured, so that the overall weight of the beam is reduced, and the beam is under the uniform load. The stress characteristics of small and medium-sized two ends are large; the components produced on site are prone to insufficient maintenance and vibration, while the prefabrication factory can ensure the overall utilization and quality control of materials, and the production environment of the factory is more variable than the on-site construction environment. It is beneficial to the quality control; on the other hand, it can effectively ensure the health and labor safety of the workers on the construction site; at the same time, the upper connecting plate is set to ensure the connection quality between the profiled steel and the cast-in-place concrete slab, and the bonding force with the cast-in-place concrete slab is large. Strong shear resistance; erecting ribs, 7-shaped connecting rods and pegs are set to further ensure the overall strength.

Description of drawings

Figure 1 is a front view of a concrete composite beam partially covered by a web opening steel section.

Figure 2 is a side view of a concrete composite beam partially covered by a web opening steel section.

Fig. 3 is a top view of a concrete composite beam partially covered with open-hole steel webs.

Figure 4 is an axonometric view of a concrete composite beam partially enveloped by the web opening steel.

In the picture: section steel-1, PVC pipe-2, precast concrete-3, cast-in-place concrete slab-4, erecting bars-5, 7-shaped connecting rod-6, stud-7, upper connecting plate-8.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in Figures 1-4, it is a structural diagram of a concrete composite beam with an open-hole web-shaped steel part provided in an embodiment of the present invention, including: a shaped steel 1, and a plurality of A through holes are arranged in an array on its web;

The prefabricated concrete 3 arranged inside the section steel 1, and a plurality of B through holes corresponding to the A through holes are arranged in an array on the prefabricated concrete 3, and the A through holes are communicated with the B through holes;

The cast-in-place concrete flange plate 4 arranged on the section steel 1 and the precast concrete 3;

Wherein, the steel structure is arranged across the precast concrete 3 and the cast-in-place concrete flange plate 4;

It is arranged on the upper connecting plate 8 on the upper part of the section steel 1, and the upper connecting plate 8 is provided with gaps in an array. Strong shear resistance.

A plurality of erecting bars 5 are provided through the upper connecting plate 8, and two sides of the plurality of erecting bars 5 are respectively provided with 7-shaped connecting rods 6, and the lower part of the 7-shaped connecting rods 6 is arranged inside the precast concrete 3. The upper part of the 7-shaped connecting rod 6 is arranged inside the cast-in-place concrete slab 4;

Several pegs 7 are arranged on the web of the section steel 1 .

Specifically, in the prefabrication factory, the section steel 1 is now produced, the upper connecting plate 8 and the pegs 7 are welded on the section steel 1 respectively, the erecting bars 5 are set through the upper connecting plate 8, and the bottom of the 7-shaped connecting rod 6 is fixedly welded on the The bottom of section steel 1; then precast concrete 3 is poured in the precast yard, and the pouring of the cast-in-place concrete flange plate 4 is carried out on site; Small, the construction efficiency will be improved; at the same time, the A through hole is set on the section steel 1, and the B through hole is reserved when the precast concrete 3 is poured, so that the overall weight of the beam is reduced, and the beam is subjected to uniform load. The stress characteristics of the two ends are large across the middle and small; the components produced on site are prone to insufficient maintenance and poor vibrating, while the prefabrication factory can ensure the overall utilization and quality control of materials, and the production environment of the factory is more variable than the on-site construction. The environment is conducive to the grasp of quality; on the other hand, it can effectively ensure the health and labor safety of workers on the construction site; at the same time, the upper connecting plate 8 is set to ensure the connection quality between the profiled steel 1 and the cast-in-place concrete slab 4, and the cast-in-place concrete slab 4 The bonding force is large, and the shear resistance is strong; the erecting ribs 5, 7-shaped connecting rods 6 and pegs 7 are arranged to further ensure the overall strength.

The profiled steel 1 is an I-beam, the width of the upper flange is smaller than the width of the lower flange, and a through hole A is provided on the web of the profiled steel 1 .

The erecting ribs 5 are arranged through the through holes on the upper connecting plate 8, and this arrangement further connects the erecting ribs 5 and the upper connecting plate 8 to increase the overall strength. The erecting ribs 5 can also be divided into two parts. The two sections are welded on the upper connecting plate 8, so that the erection rib 5 and the upper connecting plate 8 are fixedly connected.

The number of the 7-shaped connecting rods 6 and the pegs 7 are the same, and A through holes are arranged at intervals between the plurality of 7-shaped connecting rods 6 .

The pegs 7 are welded on the web of the section steel 1; the pegs 7 and the 7-shaped connecting rod 6 are located in the same section; there is a certain distance between the pegs 7 and the 7-shaped connecting rod 6.

In order to improve the stability of the connection between the profiled steel 1 and the figure-7 connecting rod 6 , an A hook is provided on the upper part of the figure-7-shaped connecting rod 6 , and the A hook is in contact with the profiled steel 1 .

In order to improve the overall toughness of the cast-in-place concrete flange plate 4 after the pouring is completed, B hooks are also provided at both ends of the erection bars 5 .

The bending angles of the A hook and the B hook are both 135°.

In order to well pour the B through hole, a support pipe 2 is arranged in the A through hole on the profile steel 1, and the support pipe 2 is arranged through the precast concrete 3, and the support pipe 2 is arranged in the B through hole. By setting the support pipe 2, the overall weight of the beam is reduced, and when the beam is subjected to evenly distributed loads, it is very suitable for the shearing span of the middle and small ends. The height limit, on the premise of ensuring the clear height of the building, try to reduce the floor height and obtain environmental benefits, which also means that the use of materials can be saved and economic benefits can be obtained.

Both ends of the support pipe 2 are flush with both ends of the precast concrete 3 .

The support pipe 2 is a PVC pipe. The outer diameter of the support tube 2 is equal to the inner diameter of the A through hole.

The support tube 2 may be circular, quadrangular or hexagonal.

The outer edges on both sides of the precast concrete 3 are flush with the lower flange edge of the profiled steel 1 . The precast concrete 3 is located between the upper and lower flanges of the profiled steel 1 and is close to the top surface of the lower flange; the left and right outer edges of the precast concrete 3 are flush with the lower flange edge of the profiled steel 1, and redundant pouring is avoided under the condition of ensuring the overall strength .

The embodiment of the present invention also provides a construction method for a concrete composite beam partially covered by a web opening section steel, comprising the following steps:

S1: Put the processed section steel 1 in place in the prefabrication yard, assemble the erecting bars 5, the 7-shaped connecting rod 6, the stud 7 and the upper connecting plate 8 on the section steel 1, support the formwork and pour concrete to complete the prefabricated part, form prefabricated components;

Specifically, the upper connecting plate 8 is fixedly installed on the top surface of the upper flange of the section steel 1, the pegs 7 and the 7-shaped connecting rod 6 are positioned and welded on the web and the upper and lower flanges of the section steel 1, and the PVC pipe is placed on the section A of the section steel 1. In the through hole and make the left and right edges flush with the edge of the lower flange of section steel 1, place the erecting bars 5 on the top surface of the upper flange of section steel 1 and arrange them according to the design spacing, and set through the upper connecting plate 8. Pouring prefabricated concrete 3 to complete the prefabricated part to form a prefabricated component;

S2: Transport the prefabricated components to the construction site and hoist them in place, and reasonably connect the prefabricated components to the columns or main beams;

S3 : Support the formwork and pour the cast-in-place concrete flange plate 4 on the precast concrete 3 .

The idea of partially prefabricated and partially cast-in-place in the present invention improves the construction speed. Partial wrapping of the section steel 1 can improve the integrity of the concrete beam. The openings on the web of the section steel 1 can not only reduce the weight of the structure, but also facilitate the arrangement of pipelines and reduce the height of the building. At the same time, the upper flange of the profiled steel 1 is placed in the concrete wing plate, which can further reduce the use of materials and the height of the building. The combination of section steel and concrete makes full use of the advantages of both, and has the advantages of high bearing capacity, good seismic performance and steel saving. The prefabricated web opening section steel part is covered with concrete composite beam including section steel 1, erection bars 5, 7-shaped connecting rods 6, studs 7, upper connecting plate 8 and precast concrete 3, which are all prefabricated in the factory. The prefabricated steel section and the column are reasonably connected on the construction site, and then the concrete floor slab is poured to complete the installation. Compared with traditional SRC beams, on-site construction procedures, construction materials and construction man-hours will be reduced without binding steel bars on site, and construction efficiency will be improved; Compared with the beam without openings, the overall weight of the beam is reduced. Moreover, when the beam is subjected to uniformly distributed loads, it is very suitable for the stress characteristics of the shear span, which is small and large at both ends; the building function determines the building structure. In the cast-in-place floor slab, the method of web opening can facilitate the arrangement of pipelines, and can solve the limitation of building floor height. On the premise of ensuring the clear height of the building, the floor height can be reduced as much as possible to obtain environmental benefits. This also means that the use of materials can be saved and economic benefits can be obtained; the components produced on site are prone to insufficient maintenance and poor vibration, while factory production can ensure the overall utilization and quality control of materials, and the production environment of the factory is more than The changing on-site construction environment is conducive to the grasp of quality. On the other hand, it can effectively ensure the health and labor safety of the workers on the construction site; the prefabricated web-opening section steel part is covered with concrete composite beams, which can not only play the advantages of the composite structure, but also meet the requirements of aesthetics and functions, and at the same time can improve the construction speed. , reducing the weight of the structure, ensuring construction quality and safety, and can be widely used in various building structures, which greatly promotes the development of the construction industry.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (10)

1. A web plate open-pore section steel partially-wrapped concrete composite beam is characterized by comprising section steel, wherein a plurality of through holes A are arranged on a web plate in an array manner;

the precast concrete is arranged in the profile steel, a plurality of through holes B which are arranged corresponding to the through holes A are formed in the precast concrete in an array mode, and the through holes A are communicated with the through holes B;

the cast-in-place concrete flange plates are arranged on the section steel and the precast concrete;

wherein the steel structure is arranged across the precast concrete and the cast-in-place concrete flange plate;

the upper connecting plate is arranged on the upper part of the profile steel, and gaps are arranged on the upper connecting plate in an array manner;

the upper connecting plate is arranged on the upper side of the precast concrete slab, the upper connecting plate penetrates through a plurality of erection ribs arranged on the upper connecting plate, two sides of the plurality of erection ribs are respectively provided with a 7-shaped connecting rod, the lower parts of the 7-shaped connecting rods are arranged in the precast concrete, and the upper parts of the 7-shaped connecting rods are arranged in the cast-in-place concrete slab;

and the plurality of pegs are arranged on the web plate of the section steel.

2. The partially encased concrete composite beam of web opening section steel according to claim 1, wherein said section steel is an i-beam, and the width of the upper flange thereof is smaller than the width of the lower flange thereof.

3. The composite beam of claim 1, wherein the number of the 7-shaped connecting rods and the number of the studs are the same, and a plurality of the 7-shaped connecting rods are provided with a through hole A at intervals.

4. The composite beam of claim 1, wherein the upper part of the 7-shaped connecting rod is provided with an A hook which abuts against the section steel.

5. The partially encased concrete composite beam of web open-cell steel section as claimed in claim 1, wherein said frame bars are also provided with B-hooks at both ends.

6. The composite beam of claim 1, wherein a support tube is disposed in the through hole A of the section steel and is disposed through the precast concrete, and a support tube is disposed in the through hole B.

7. The composite beam of claim 6, wherein the two ends of the supporting tube are flush with the two end faces of the precast concrete.

8. The composite beam of claim 6, wherein the support tubes are PVC tubes.

9. The partially encased concrete composite beam of web opening section steel according to claim 1, wherein the outer edges of both sides of the precast concrete are flush with the lower flange edge of the section steel.

10. A construction method of a composite beam in which a section of open-celled web steel is partially surrounded by concrete according to any one of claims 1 to 9, comprising the steps of:

placing the processed section steel in place in a prefabrication field, fixedly installing an upper connecting plate on the top surface of the upper flange of the section steel, positioning and welding a stud and a 7-shaped connecting rod on a web plate of the section steel and the upper and lower flanges, placing a PVC pipe in an A through hole of the section steel, enabling the left and right edges to be flush with the edge of the lower flange of the section steel, placing erection ribs on the top surface of the upper flange of the section steel and arranging the erection ribs according to a design interval, penetrating the erection ribs through the upper connecting plate, erecting a mold and pouring precast concrete to complete a prefabricated part, and forming;

transporting the prefabricated part to a construction site and hoisting the prefabricated part in place, and reasonably connecting the prefabricated part with the column or the main beam;

and (5) erecting a formwork and pouring the cast-in-place concrete flange plate on the precast concrete.

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