PEC beam column and column-column connecting system capable of achieving efficient pouring and butt joint

Abstract

The invention relates to a PEC beam column and column-column connecting system capable of achieving efficient pouring and butt joint, bracket web inserting grooves with upward openings are formed in the ends, away from a PEC column, of brackets, PEC beam webs at the two ends of a PEC beam are inserted into the bracket web inserting grooves of the brackets on the two sides correspondingly, and U-shaped steel plates serve as steel molds of a column-column post-pouring belt and a beam column post-pouring belt; and the reinforcing ribs are inserted between the upper PEC column and the lower PEC column and between the bracket and the flange of the PEC beam. The method has the beneficial effects that butt joint is conducted at the butt joint position of the PEC beam and the bracket in a web slot mode, the butt joint efficiency is improved, the positioning difficulty in beam column butt joint is low, the needed positioning time is shortened compared with traditional positioning, the construction workload is greatly reduced, the connection accuracy and stability of the PEC beam and the bracket are directly guaranteed after insertion, and the construction efficiency is improved. Subsequent installation of the U-shaped steel plate is facilitated; and in the post-cast strip pouring aspect, formwork erecting and disassembling steps are not needed, the construction process is environmentally friendly, the construction time is greatly saved, and material waste is effectively avoided.

Description

Technical Field

[0001] The invention belongs to the field of building technology and steel structure technology, and in particular relates to a PEC beam-column and column-column connection system with high efficiency casting and docking. Background Art

[0002] Prefabricated and assembled structures are structures in which prefabricated components are manufactured in advance in prefabrication factories and assembled directly on the construction site. They have the advantages of fast and convenient construction, reducing the labor intensity of workers, improving the construction environment, reducing noise pollution, and reducing wet operations. They are widely favored in the construction industry.

[0003] At present, partially coated steel-concrete composite structures are widely used in prefabricated structures. While solving the problems of corrosion prevention, fire prevention and sound insulation of prefabricated steel structures, they also improve the seismic resistance of prefabricated concrete structures and the safety and reliability of vertical nodes, ensuring the safety of the structure. However, the existing PEC column-to-column connection and PEC beam-to-column connection structures still have the following shortcomings:

[0004] 1) The existing PEC beam-column lifting and docking method requires workers to perform positioning operations. It is difficult to accurately position the large beam-column components, and the positioning time is long, which increases the workload of construction.

[0005] 2) The existing PEC beam-column connection and column-column connection are usually cast with traditional wooden formwork, which is cumbersome to operate, increases the construction period, and consumes a lot of wood. In addition, the traditional post-casting method will leave a protruding gate that needs to be removed later, which not only wastes materials, but also affects the appearance and increases construction time.

[0006] 3) In more conventional designs, existing PEC column-column connections and beam-column connections are often welded, which is technically difficult and dangerous for workers working at heights.

[0007] Therefore, in order to solve the above technical problems, it is necessary to provide a PEC beam-column and column-column connection system with efficient casting and docking to overcome the above defects in the prior art. Summary of the invention

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a PEC beam-column and column-column connection system with efficient casting and docking.

[0009] This highly efficient casting and docking PEC beam-column and column-column connection system includes an upper PEC column, a lower PEC column, a U-shaped steel plate, a corbel and a PEC beam, and a column-column post-casting strip is formed at the connection between the upper PEC column and the lower PEC column; the formwork is supported by the U-shaped steel plate;

[0010] The corbel is fixed on the side of the PEC column. The end of the corbel away from the PEC column is provided with an upwardly open corbel web slot. The PEC beam webs at both ends of the PEC beam are respectively inserted into the corbel web slots of the corbels on both sides. The connection between the corbel and the PEC beam forms a beam-column post-casting strip.

[0011] The U-shaped steel plate is used as a steel formwork for the column-column post-casting strip and the beam-column post-casting strip, and is inserted between the upper PEC column and the lower PEC column, the corbel and the flange of the PEC beam; a pouring port is opened at the lower part of the web of the U-shaped steel plate.

[0012] Preferably, the lower flange of the corbel is longer than the upper flange, the upper flange of the PEC beam is longer than the lower flange, the corbel web slot is arranged in the area where the lower flange of the corbel is longer than the upper flange, the corbel web slot is flush with the end of the lower flange of the corbel, and the PEC beam web is flush with the end of the upper flange of the PEC beam.

[0013] Preferably, in the column-column post-cast strip, the two side flanges of the U-shaped steel plate are fixed to the inner side of the flange of the PEC column by single-sided bolts; in the beam-column post-cast strip, the two side flanges of the U-shaped steel plate are fixed to the inner side of the upper and lower flanges of the corbel and the PEC beam by single-sided bolts.

[0014] The construction method of this highly efficient casting and butting PEC beam-column and column-column connection system includes the following steps:

[0015] Step 1: PEC column and corbel are welded and connected, and the upper PEC column and the lower PEC column concrete are pre-cast, and the post-cast strips are reserved at the bottom of the upper PEC column and the top of the lower PEC column respectively, and the upper PEC column and the lower PEC column are aligned up and down to form the column post-cast strip;

[0016] Step 2: insert the U-shaped steel plate into the post-casting strip of the column, fix it with a single-sided bolt, and after completing the formwork of the post-casting strip of the column, pour it from bottom to top through the pouring port;

[0017] Step 3: Lift the PEC beam, and insert the PEC beam webs at both ends of the PEC beam into the corbel web slots of the corbels on both sides, so that the beam-column post-casting strip is formed at the connection between the corbel and the PEC beam;

[0018] Step 4: Insert the U-shaped steel plate into the post-casting strip of the beam and column, fix it with a single-sided bolt, complete the formwork of the post-casting strip of the beam and column, and pour it from bottom to top through the pouring port.

[0019] Preferably, in step one, when pre-casting the concrete of the upper PEC column, a bent pipe is pre-buried above the post-casting strip, one end of the bent pipe extends into the column-column post-casting strip, and the other end forms an observation hole on the surface of the upper PEC column, and the observation hole is connected to the column-column post-casting strip; in step two, concrete is poured from the pouring port to the column-column post-casting strip until the concrete overflows from the observation hole.

[0020] Preferably, bolt holes are correspondingly opened on the web of the PEC beam and the web slot of the corbel. In step three, after the web of the PEC beam is inserted into the web slot of the corbel, bolts penetrate the web of the PEC beam and the web slot of the corbel to fix the corbel and the PEC beam.

[0021] Preferably, an observation hole is provided on the upper flange of the corbel or PEC beam, and concrete is poured from the pouring port into the post-casting zone of the beam and column until the concrete overflows from the observation hole.

[0022] The beneficial effects of the present invention are:

[0023] 1) The present invention has a simple structure and is easy to operate. A web slot is used at the joint between the PEC beam and the corbel to improve the joint efficiency. The positioning difficulty is low in the beam-column joint, and the required positioning time is shortened compared with the traditional positioning, which greatly reduces the construction workload. After insertion, the connection accuracy and stability of the PEC beam and the corbel are directly guaranteed, which is convenient for the subsequent installation of the U-shaped steel plate.

[0024] 2) The present invention uses a U-shaped steel plate that is highly accurately prefabricated in a prefabrication factory as a connecting plate at the flange of the PEC column steel beam, and adopts a single-sided bolt connection to increase the stability and connection strength between the two components at the post-casting location, avoids fire operation, ensures construction safety, and achieves no need for formwork and demolding steps in the casting of the post-casting strip. The construction process is environmentally friendly, greatly saves construction time and effectively avoids waste of materials. No construction waste is generated due to demolding, there is no later node gate, and construction materials are saved. The surface of the PEC beam and the PEC column is guaranteed to be beautiful, the construction time is reduced, and the operation is convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural explosion diagram of the invention system of this application;

[0026] Figure 2 A three-dimensional diagram of the innovative PEC column-to-column connection and beam-to-column connection system provided for the invention of this application;

[0027] Figure 3 An exploded view of the column-to-column connection structure 1 in the system provided by the present invention;

[0028] Figure 4 An exploded diagram of the beam-column connection structure in the system provided by the present invention;

[0029] Figure 5 This is a schematic diagram of the PEC beam lifting and assembly;

[0030] Figure 6 This is a detailed stereoscopic view of the corbel components;

[0031] Figure 7 Detailed perspective view of the PEC beam component.

[0032] Among them: upper PEC column 1, lower PEC column 2, U-shaped steel plate 3, corbel 4, PEC beam 6, pouring port 12, observation hole 16, single-sided bolt 20, corbel web slot 21, corbel precast concrete 23, slot bolt hole 24, corbel flange bolt hole 25, PEC beam precast concrete 26, PEC beam flange bolt hole 27, PEC beam web bolt hole 28. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for ordinary persons in the art, without departing from the principle of the present invention, the present invention can also be modified in some ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0034] Embodiment 1

[0035] As an example, Figures 1 to 4 As shown, this efficient casting and docking PEC beam-column and column-column connection system includes an upper PEC column 1, a lower PEC column 2, a U-shaped steel plate 3, a corbel 4 and a PEC beam 6. The basic structures of the upper PEC column 1, the lower PEC column 2, the corbel 4 and the PEC beam 6 are all H-shaped structures. PEC refers to partially encased steel-concrete composite members (PEC for short). That is, a structural member formed by filling concrete between the outer peripheral contours of the main steel parts. For details, please refer to the "Technical Code for Partially Encased Steel-Concrete Structures" implemented on January 1, 2021.

[0036] The upper PEC column 1 and the lower PEC column 2 are connected up and down, and a post-casting strip is reserved at the end, and a column-column post-casting strip is formed at the connection between the upper PEC column 1 and the lower PEC column 2. The column-column post-casting strip is supported by a U-shaped steel plate 3. Figure 3 As shown:

[0037] Several bolt holes are provided on the flange of the post-cast strip, and corresponding bolt holes are also provided on the flanges on both sides of the U-shaped steel plate 3. During installation, the flanges on both sides of the U-shaped steel plate 3 are inserted into the post-cast strip of the column and fit with the flange of the PEC column. The bolt holes of the two are aligned and fixed by inserting a single-sided bolt 20 from the outside. A pouring port 12 is provided on the lower part of the web of the U-shaped steel plate 3 for pouring the post-cast strip of the column from bottom to top.

[0038] The flanges of the PEC columns on both sides are arranged opposite to each other, and two brackets 4 are welded and fixed to the outer side of the flanges of the PEC columns. In this embodiment, they are specifically welded to the side of the upper PEC column 1. The two ends of the PEC beam 6 are respectively connected to the brackets 4, and a U-shaped steel plate 3 is set to fix the formwork. Figure 4 As shown:

[0039] The connection ends of the PEC beam 6 and the corbel 4 are respectively reserved with post-casting strips, and the upper and lower flanges at the post-casting strips are flushly butted, and beam-column post-casting strips are respectively formed on both sides of the web, and the U-shaped steel plate 3 is horizontally inserted into the beam-column post-casting strips. The upper and lower flanges of the PEC beam 6 and the corbel 4 at the post-casting strips are respectively provided with bolt holes, and the upper and lower flanges of the U-shaped steel plate 3 are also provided with bolt holes, and the flanges on both sides are respectively fixed to the inner sides of the upper and lower flanges of the corbel 4 and the PEC beam 6 by single-sided bolts 20.

[0040] The wing width of the U-shaped steel plate 3 matches the single-side wing width of the PEC column, the corbel 4 and the PEC beam 6, so that the U-shaped steel plate 3 will not protrude or sink on the surface of the beam or column after being inserted, and has good integrity.

[0041] Embodiment 2

[0042] As another embodiment, the second embodiment proposes, based on the first embodiment, a more specific efficient casting and docking PEC beam-column and column-column connection system, the connection method of the corbel 4 and the PEC beam 6 is buried 5 to Figure 7 As shown, specifically:

[0043] The corbel 4 is fixed to the side of the PEC column, and the end of the corbel 4 away from the PEC column is provided with an upwardly open corbel web slot 21, and the PEC beam webs at both ends of the PEC beam 6 are respectively inserted into the corbel web slots 21 of the corbels 4 on both sides, and the connection between the corbel 4 and the PEC beam 6 forms a beam-column post-casting strip;

[0044] The end of the corbel 4 connected to the PEC column is precast with corbel precast concrete 23, and the upper and lower flanges of the corbel 4 extend beyond the length range of the PEC beam precast concrete 26. Specifically, Figure 6 As shown, the lower flange of the corbel 4 is longer than the upper flange, and the corbel web slot 21 is arranged in the area where the lower flange of the corbel 4 is longer than the upper flange. The corbel web slot 21 is flush with the end of the lower flange of the corbel 4, so the corbel web slot 21 is exposed on the corbel 4.

[0045] The middle part of the PEC beam 6 is cast with a PEC beam precast concrete 26, and the flanges on both sides extend to the outside of the area of ​​the PEC beam precast concrete 26. Specifically, Figure 7 As shown: the upper flange of the PEC beam 6 is longer than the lower flange, and the web of the PEC beam is flush with the end of the upper flange of the PEC beam 6.

[0046] The web heights of the corbel 4 and the PEC beam 6 are equal, the flange widths are equal, and the length difference between the upper and lower flanges of the corbel 4 and the PEC beam 6 is equal. In this embodiment, the protruding portion of the upper flange of the corbel 4 and the protruding portion of the lower flange of the PEC beam 6 are equal in length, and the protruding portion of the lower flange of the corbel 4 and the protruding portion of the upper flange of the PEC beam 6 are equal in length. Therefore, when the corbel 4 and the PEC beam 6 are connected, the web of the PEC beam is inserted into the corbel web slot 21 from above, and after being fully inserted, the upper and lower flanges of the corbel 4 and the PEC beam 6 are flush and directly spliced, which is dense and seamless.

[0047] It should be noted that the parts in this embodiment that are the same or similar to those in the first embodiment can be referenced to each other and will not be described in detail in this application.

[0048] Embodiment 3

[0049] As another embodiment, this embodiment 3 proposes, on the basis of embodiments 1 and 2, a construction method of this highly efficient casting and docking PEC beam-column and column-column connection system, wherein the construction method of the column-column connection system comprises the following steps:

[0050] Step 1: PEC column and corbel 4 are welded and connected, and concrete of upper PEC column 1 and lower PEC column 2 are pre-cast, and post-cast strips are reserved at the bottom of upper PEC column 1 and the top of lower PEC column 2. Figure 3 As shown, when the concrete of the upper PEC column 1 is precast, a bent pipe is pre-buried above the post-casting strip, one end of the bent pipe extends into the post-casting strip of the column, and the other end forms an observation hole 16 on the surface of the upper PEC column 1, and the observation hole 16 is connected to the post-casting strip of the column;

[0051] The upper PEC column 1 and the lower PEC column 2 are aligned vertically to form a column-column post-casting strip;

[0052] Step 2: Insert the U-shaped steel plate 3 into the column-to-column post-casting strip and fix it with a single-sided bolt 20. After completing the formwork for the column-to-column post-casting strip, pour concrete into the column-to-column post-casting strip from bottom to top through the pouring port 12 until the concrete overflows from the observation hole 16.

[0053] Embodiment 4

[0054] As another embodiment, this fourth embodiment proposes, on the basis of the third embodiment, a construction method of the PEC beam-column and column-column connection system with high efficiency casting and docking. After the construction of the column-column connection system is completed, the construction of the beam-column connection system is carried out. The construction method of the beam-column connection system includes the following steps:

[0055] Step 1: An observation hole 16 is opened on the upper flange of the corbel 4 or the PEC beam 6. The PEC beam 6 is lifted and the PEC beam webs at both ends of the PEC beam 6 are respectively inserted into the corbel web slots 21 of the corbels 4 on both sides, thereby directly achieving an accurate connection between the corbel 4 and the PEC beam 6 without the need for additional supporting structures or human control, thereby providing a good foundation for subsequent construction.

[0056] Bolt holes are correspondingly provided on the web of the PEC beam and the web slot 21 of the corbel. After the web of the PEC beam is inserted into the web slot 21 of the corbel, the bolts penetrate the web of the PEC beam and the web slot 21 of the corbel to fix the corbel 4 and the PEC beam 6, further improving the strength of the connection between the corbel 4 and the PEC beam 6. A beam-column post-casting strip is formed at the connection between the corbel 4 and the PEC beam 6.

[0057] Step 2: Insert the U-shaped steel plate 3 into the beam-column post-casting strip and fix it with a single-sided bolt 20. After completing the formwork of the beam-column post-casting strip, pour concrete into the post-casting strip from bottom to top through the pouring port 12 until the concrete overflows from the observation hole 16. In this embodiment, the observation hole 16 is opened on the upper flange of the PEC beam 6.

[0058] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

Claims

1. A PEC beam-column and column-column connection system with high efficiency casting and docking, characterized in that: It includes upper PEC column, lower PEC column, U-shaped steel plate, corbel and PEC beam, and the connection between the upper PEC column and the lower PEC column forms a column-column post-casting strip; the formwork is supported by the U-shaped steel plate; The corbel is fixed on the side of the PEC column. The end of the corbel away from the PEC column is provided with an upwardly open corbel web slot. The PEC beam webs at both ends of the PEC beam are respectively inserted into the corbel web slots of the corbels on both sides. The connection between the corbel and the PEC beam forms a beam-column post-casting strip. The U-shaped steel plate is used as a steel formwork for the column-column post-casting strip and the beam-column post-casting strip, and is inserted between the upper PEC column and the lower PEC column, the corbel and the flange of the PEC beam; a pouring port is opened at the lower part of the web of the U-shaped steel plate.

2. The PEC beam-column and column-column connection system with high efficiency casting and docking according to claim 1 is characterized in that: The lower flange of the corbel is longer than the upper flange, the upper flange of the PEC beam is longer than the lower flange, the corbel web slot is arranged in the area where the lower flange of the corbel is longer than the upper flange, the corbel web slot is flush with the end of the lower flange of the corbel, and the PEC beam web is flush with the end of the upper flange of the PEC beam.

3. The efficient casting and docking PEC beam-column and column-column connection system according to claim 1 is characterized in that: In the column-column post-casting strip, the two side flanges of the U-shaped steel plate are fixed to the inner side of the flange of the PEC column by single-sided bolts; in the beam-column post-casting strip, the two side flanges of the U-shaped steel plate are fixed to the inner side of the upper and lower flanges of the corbel and the PEC beam by single-sided bolts.

4. The construction method of the PEC beam-column and column-column connection system of any one of claims 1 to 3 with high efficiency casting and docking, characterized in that: The following steps are involved: Step 1: PEC column and corbel are welded and connected, and the upper PEC column and the lower PEC column concrete are pre-cast, and the post-cast strips are reserved at the bottom of the upper PEC column and the top of the lower PEC column respectively, and the upper PEC column and the lower PEC column are aligned up and down to form the column post-cast strip; Step 2: insert the U-shaped steel plate into the post-casting strip of the column, fix it with a single-sided bolt, and after completing the formwork of the post-casting strip of the column, pour it from bottom to top through the pouring port; Step 3: Lift the PEC beam, and insert the PEC beam webs at both ends of the PEC beam into the corbel web slots of the corbels on both sides, so that the beam-column post-casting strip is formed at the connection between the corbel and the PEC beam; Step 4: Insert the U-shaped steel plate into the post-casting strip of the beam and column, fix it with a single-sided bolt, complete the formwork of the post-casting strip of the beam and column, and pour it from bottom to top through the pouring port.

5. The construction method of the PEC beam-column and column-column connection system with high efficiency casting and docking according to claim 4 is characterized in that: In step one, when the concrete of the upper PEC column is pre-cast, a bent pipe is pre-buried above the post-casting strip, one end of the bent pipe extends into the column-column post-casting strip, and the other end forms an observation hole on the surface of the upper PEC column, and the observation hole is connected to the column-column post-casting strip; in step two, concrete is poured from the pouring port to the column-column post-casting strip until the concrete overflows from the observation hole.

6. The construction method of the PEC beam-column and column-column connection system with high efficiency casting and docking according to claim 4 is characterized in that: Bolt holes are correspondingly opened on the web of the PEC beam and the slot of the web of the corbel. In step three, after the web of the PEC beam is inserted into the slot of the web of the corbel, the bolts penetrate the web of the PEC beam and the slot of the web of the corbel to fix the corbel and the PEC beam.

7. The construction method of the PEC beam-column and column-column connection system with high efficiency casting and docking according to claim 4 is characterized in that: An observation hole is opened on the upper flange of the corbel or PEC beam, and concrete is poured from the pouring port into the post-casting zone of the beam and column until the concrete overflows from the observation hole.

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