A prefabricated reinforced concrete beam-column connection node and construction method thereof

Abstract

The present invention discloses an assembled reinforced concrete beam-column connection node and a construction method thereof, wherein the connection node comprises an upper connection steel cylinder, a lower connection steel cylinder, a solid prefabricated column and a structural beam, wherein the upper connection steel cylinder and the lower connection steel cylinder are respectively fixed to the ends of the column longitudinal reinforcement slinging sections of the solid prefabricated columns on the upper and lower sides of the beam-column core area, a steel hoop is provided at the bottom of the lower connection steel cylinder, and the bottom end of the steel hoop is correspondingly arranged at the top of the beam-column core area, the upper connection steel cylinder and the lower connection steel cylinder openings are opposite and welded and closed at the joint; the upper connection steel cylinder, the lower connection steel cylinder, the steel hoop and the internal space of the beam-column core area are connected to each other, and the connected space is filled with concrete through a grouting assembly. The present invention can not only make the connection of the column longitudinal reinforcement staggered from the beam-column core area, avoid the connection of the column longitudinal reinforcement one by one in the beam-column core area with a narrow construction space, but also ensure the through arrangement of the column longitudinal reinforcement in the beam-column core area, and the construction is convenient and efficient, and the connection quality is reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated building construction, and in particular to a prefabricated reinforced concrete beam-column connection node and a construction method thereof. Background Art

[0002] Prefabricated concrete frame structure is one of the main forms of prefabricated buildings and a new type of green construction method. The nodes of prefabricated concrete frame structure are the key link in engineering quality control. The connection nodes of reinforced concrete frame structure are the places where the upper and lower frame columns, frame beams and floor slabs intersect. In the process of structural design, it is generally necessary to strengthen the reinforcement. Therefore, the steel bars of the frame structure nodes are very dense. As a prefabricated concrete frame structure, prefabricated frame columns, prefabricated frame beams, prefabricated floor slabs and other components have reserved steel bars. How to make these steel bars gather in one place without mutual collision and reasonable load bearing is a major issue that must be considered. It is also the primary problem to be solved in factory prefabrication and on-site lifting and assembly construction. Due to the dense steel bars in the node area, when the longitudinal bars of the prefabricated frame columns are connected one by one through sleeve grouting in the node, there are often problems such as small construction space, high connection difficulty, low construction efficiency and difficult to ensure construction quality. Summary of the invention

[0003] The purpose of the present invention is to provide an assembled reinforced concrete beam-column connection node and a construction method thereof, so as to solve the technical problems described in the background technology.

[0004] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0005] An assembled reinforced concrete beam-column connection node comprises an upper connecting steel cylinder, a lower connecting steel cylinder, a solid prefabricated column and a structural beam, wherein the cross-sectional shapes of the upper connecting steel cylinder and the lower connecting steel cylinder are matched with the cross-sectional shapes of the solid prefabricated column, and the two are respectively fixed to the ends of the column longitudinal reinforcement slinging sections of the solid prefabricated columns on the upper and lower sides of the beam-column core area;

[0006] A connecting steel is embedded at the bottom of the solid prefabricated column in the upper part of the core area of ​​the beam and column, and the end of the connecting steel is welded to the sealing plate of the upper connecting steel cylinder;

[0007] The column longitudinal reinforcement sling section in the solid prefabricated column at the lower part of the beam-column core area vertically penetrates the beam-column core area and extends to the top of the beam-column core area, and diagonal bracing steel bars are fixedly arranged between the column longitudinal reinforcements in the beam-column core area;

[0008] The column stirrups at the ends of the solid prefabricated columns and the core areas of the beams and columns are densely arranged;

[0009] The peripheral wall of the lower connecting steel cylinder extends beyond the bottom sealing plate of the cylinder by a distance to form a steel hoop, and the bottom end of the steel hoop is correspondingly arranged at the top of the core area of ​​the beam column, and the openings of the upper connecting steel cylinder and the lower connecting steel cylinder are opposite and welded and closed at the joint;

[0010] The upper connecting steel cylinder, the lower connecting steel cylinder, the steel hoop and the internal space of the beam-column core area are connected to each other, and the upper connecting steel cylinder, the lower connecting steel cylinder, the steel hoop and the internal space of the beam-column core area are fully filled with concrete through the grouting assembly.

[0011] Preferably, additional steel bars are provided at the top of the solid precast column at the lower part of the beam-column core area. The additional steel bars are correspondingly arranged on the inner side of the column longitudinal bars. One end of the steel bar body is embedded in the concrete of the solid precast column, and the other end vertically penetrates the beam-column core area and is fixed on the lower connecting steel cylinder.

[0012] Preferably, an anchor plate is fixedly provided at one end of the additional steel bar embedded in the solid prefabricated column.

[0013] Preferably, the grouting assembly includes grouting holes and exhaust holes opened at the upper connecting steel cylinder sealing plate, and grouting holes opened at the lower connecting steel cylinder sealing plate. Grouting pipes and exhaust pipes are respectively installed in the grouting holes and exhaust holes. The grouting pipes and exhaust pipes are both pre-buried in the upper solid prefabricated columns in the core area of ​​the beams and columns. The grouting pipes and exhaust pipes connect the closed abdominal cavity formed by the upper connecting steel cylinder and the lower connecting steel cylinder with the outside world, and the grouting holes connect the spaces on the upper and lower sides of the lower connecting steel cylinder sealing plate.

[0014] Preferably, the connecting steel is a cross-shaped steel with flanges, and the setting height of the cross-shaped steel with flanges is not less than half of the long side dimension of the cross section of the solid prefabricated column.

[0015] Preferably, the length of the column stirrup densification section is not less than the long side dimension of the solid prefabricated column cross section.

[0016] Preferably, the total height of the upper connecting steel cylinder and the lower connecting steel cylinder is 10-50 cm.

[0017] Preferably, the height of the steel hoop is 3-15 cm.

[0018] In addition, the present invention also provides a construction method for the above-mentioned assembled reinforced concrete beam-column connection node, comprising the following steps:

[0019] Step 1: Make a solid prefabricated column, and fix the diagonal bracing steel bars, the upper connecting steel cylinder and the lower connecting steel cylinder in advance at the column longitudinal reinforcement joint section;

[0020] Step 2: Install the solid prefabricated columns at the lower part of the core area of ​​the beams and columns;

[0021] Step 3: construct structural beams;

[0022] Step 4: hoist the solid prefabricated column at the upper part of the core area of ​​the beam and column into place, so that the opening of the upper connecting steel cylinder is aligned with the opening of the lower connecting steel cylinder;

[0023] Step 5: Check the position of the solid prefabricated column at the upper part of the core area of ​​the beam and column, and weld and fix the upper connecting steel cylinder and the lower connecting steel cylinder at the joint between them;

[0024] Step 6: Support the formwork of the core area of ​​beams and columns;

[0025] Step 7: pour concrete into the inner space of the upper connecting steel cylinder, the lower connecting steel cylinder, the steel hoop and the core area of ​​the beam and column through the grouting assembly and vibrate to make it dense;

[0026] Step 8: After the concrete in the core area of ​​the beam and column reaches the preset strength, the formwork is removed and the next solid prefabricated column is hoisted.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention realizes the effective connection of the upper and lower solid prefabricated column longitudinal reinforcements in the core area of ​​beams and columns through the upper connecting steel cylinder and the lower connecting steel cylinder connected by welding, which can not only make the connection of the column longitudinal reinforcement staggered from the core area of ​​beams and columns, avoiding the connection of the column longitudinal reinforcements one by one in the core area of ​​beams and columns with narrow construction space, but also ensure the through arrangement of the column longitudinal reinforcements in the core area of ​​beams and columns. The closed abdominal cavity of the upper connecting steel cylinder and the lower connecting steel cylinder and the core area of ​​beams and columns are integrally grouted by cast-in-place concrete, which makes the construction convenient and efficient, and the connection quality reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or other aspects and advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings, which are only exemplary and do not limit the present invention, wherein:

[0029] Figure 1 It is a structural schematic diagram of an assembled reinforced concrete beam-column connection node according to the present invention;

[0030] Figure 2 This is a schematic structural diagram of a solid prefabricated column involved in the present invention;

[0031] Figure 3 It is a structural schematic diagram of the connection steel and the upper connection steel cylinder involved in the present invention;

[0032] Figure 4 It is a structural schematic diagram of the lower connecting steel cylinder and additional steel bars involved in the present invention.

[0033] Figure numerals: 1. solid precast column; 101. column longitudinal reinforcement; 102. column stirrups; 2. structural beam; 201. beam main reinforcement; 202. beam stirrups; 3. upper connecting steel cylinder; 4. lower connecting steel cylinder; 5. connecting steel; 6. steel hoop; 7. grouting assembly; 701. grouting hole; 702. grouting pipe; 703. exhaust hole; 704. exhaust pipe; 705. grouting hole; 8. additional steel bars; 9. anchor plate; 10. nut; 11. diagonal bracing steel bars. DETAILED DESCRIPTION

[0034] Hereinafter, an embodiment of an assembled reinforced concrete beam-column connection node and a construction method thereof of the present invention will be described with reference to the accompanying drawings. The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention. They are all explanatory and exemplary and should not be construed as limitations on the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the contents disclosed in the claims and the specification of the present application, including technical solutions that adopt any obvious replacements and modifications to the embodiments described herein.

[0035] In the description of the present invention, it should be noted that the terms "front", "rear", "left", "right", "top", "bottom", "up", "down", "inside", "outside", "horizontal", "vertical", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc., are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] The drawings of this specification are schematic diagrams, which assist in explaining the concept of the present invention and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structures of various components of the embodiments of the present invention, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0037] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The embodiments are only used to explain the present invention and are not used to limit the scope of the present invention. Figure 1-4 , the preferred embodiments of the present invention are further described in detail:

[0038] like Figure 1-4As shown, a preferred assembled reinforced concrete beam-column connection node of the present invention comprises an upper connecting steel cylinder 3, a lower connecting steel cylinder 4, a solid prefabricated column 1 and a structural beam 2, wherein the cross-sectional shapes of the upper connecting steel cylinder 3 and the lower connecting steel cylinder 4 are matched with the cross-sectional shape of the solid prefabricated column 1, and the two are respectively fixed to the ends of the column longitudinal reinforcement 101 of the solid prefabricated columns 1 on the upper and lower sides of the beam-column core area, and a threaded threaded section is provided at the end of the column longitudinal reinforcement 101, and the threaded section passes through the sealing plate of the upper connecting steel cylinder 3 or the lower connecting steel cylinder 4 and is locked by a nut 10, and of course a pad can also be added between the nut 10 and the sealing plate;

[0039] like Figure 3 As shown, a connecting steel 5 is buried at the bottom end of the solid prefabricated column 1 at the upper part of the core area of ​​the beam and column. The connecting steel 5 is preferably a cross-shaped steel with a flange. The setting height of the cross-shaped steel with a flange is not less than half of the long side dimension of the cross section of the solid prefabricated column 1, and the end of the cross-shaped steel with a flange is welded to the cover plate of the upper connecting steel cylinder 3. The setting of the cross-shaped steel with a flange can effectively enhance the connection strength between the upper connecting steel cylinder 3 and the solid prefabricated column 1.

[0040] The column longitudinal reinforcement 101 in the solid prefabricated column 1 at the lower part of the beam-column core area vertically penetrates the beam-column core area and extends to the top of the beam-column core area, and the diagonal bracing steel bars 11 are fixedly arranged between the column longitudinal reinforcements 101 in the beam-column core area by welding or binding. The diagonal bracing steel bars 11 are arranged mainly to improve the shear strength of the beam-column core area;

[0041] like Figure 4 As shown, the top of the solid prefabricated column 1 at the lower part of the core area of ​​the beam and column is provided with an additional steel bar 8, and the additional steel bar 8 is correspondingly arranged on the inner side of the column longitudinal reinforcement 101 to avoid the densely distributed column longitudinal reinforcement 101, and one end of the reinforcement body is embedded in the concrete of the solid prefabricated column 1, and the other end vertically penetrates the core area of ​​the beam and column and is fixed to the lower connecting steel cylinder 4 through the end thread and nut 10. In order to improve the bonding strength between the additional steel bar 8 and the solid prefabricated column 1, an anchor plate 9 is preferably fixedly arranged at one end of the additional steel bar 8 embedded in the solid prefabricated column 1;

[0042] The column stirrups 102 at the end of the solid prefabricated column 1 and the core area of ​​the beam and column are all densely arranged, and the length of the dense section of the column stirrups 102 is not less than the long side size of the cross section of the solid prefabricated column 1. The dense column stirrups 102 can also improve the structural strength of the beam-column connection node to a certain extent;

[0043] The peripheral wall of the lower connecting steel cylinder 4 exceeds the bottom sealing plate of the cylinder by a distance to form a steel hoop 6, and the bottom end of the steel hoop 6 is correspondingly arranged at the top of the core area of ​​the beam column, the openings of the upper connecting steel cylinder 3 and the lower connecting steel cylinder 4 are opposite and closed by slope welding at the joint, the total height of the upper connecting steel cylinder 3 and the lower connecting steel cylinder 4 is 10-50cm, and the joint between the two may be in the middle position or not in the middle position, that is, the setting height of the upper connecting steel cylinder 3 and the lower connecting steel cylinder 4 may be the same or different, and the setting of the steel hoop 6 is to avoid the formation of a horizontal through seam on the column, therefore, the height of the steel hoop 6 is preferably 3-15cm;

[0044] The upper connecting steel cylinder 3, the lower connecting steel cylinder 4, the steel hoop 6 and the internal space of the beam-column core area are connected to each other, and the upper connecting steel cylinder 3, the lower connecting steel cylinder 4, the steel hoop 6 and the internal space of the beam-column core area are filled with concrete through the grouting assembly 7. The connected space can not only realize the overall grouting, but also ensure the integrity of the concrete body after solidification, thereby improving the strength of the node. In order to more conveniently realize the grouting operation, the preferred grouting assembly 7 includes a grouting hole 701 and an exhaust hole 703 opened at the sealing plate of the upper connecting steel cylinder 3, and a grouting hole 705 opened at the sealing plate of the lower connecting steel cylinder 4. The grouting hole 701 and the exhaust hole 703 are respectively installed with a grouting pipe 702 and an exhaust pipe 704. The grouting pipe 702 and the exhaust pipe 704 are both pre-buried in the solid prefabricated column 1 at the upper part of the core area of ​​the beam and column. The grouting pipe 702 and the exhaust pipe 704 connect the closed abdominal cavity formed by the upper connecting steel cylinder 3 and the lower connecting steel cylinder 4 with the outside world, and the grouting hole 705 connects the space on the upper and lower sides of the sealing plate of the lower connecting steel cylinder 4. In order to ensure the quality of grouting, the opening sizes and opening quantities of the grouting hole 701, the exhaust hole 703 and the grouting hole 705 need to be determined by calculation.

[0045] In addition, the present invention also provides a construction method for the above-mentioned assembled reinforced concrete beam-column connection node, comprising the following steps:

[0046] Step 1: Make a solid prefabricated column 1. If the structural beam 2 is a prefabricated beam, the prefabricated beam needs to be made simultaneously, and the additional steel bars 8 and the diagonal bracing steel bars 11 are fixed in advance at the end of the column longitudinal reinforcement 101, and then the upper connecting steel cylinder 3 and the lower connecting steel cylinder 4 are sleeved on the end of the column longitudinal reinforcement 101 and locked and fixed by nuts 10;

[0047] Step 2: Install the solid prefabricated column 1 at the lower part of the core area of ​​the beam and column into place;

[0048] Step 3: construct the structural beam 2. The structural form of the structural beam 2 is not limited, and it can be a cast-in-place beam, a composite beam, or a prefabricated beam;

[0049] Step 4: hoist the solid prefabricated column 1 at the upper part of the core area of ​​the beam and column into place, adjust the position of the upper solid prefabricated column 1 so that the openings of the upper connecting steel cylinder 3 and the lower connecting steel cylinder 4 are aligned, and fix the solid prefabricated column 1 at the upper part of the core area of ​​the beam and column by temporary fixing measures;

[0050] Step 5: Check the position of the solid prefabricated column 1 at the upper part of the core area of ​​the beam and column, and fix the upper connecting steel cylinder 3 and the lower connecting steel cylinder 4 at the joint between the two by slope welding;

[0051] Step 6: Support the formwork of the core area of ​​beams and columns;

[0052] Step 7: pour concrete into the inner space of the core area of ​​the upper connecting steel cylinder 3, the lower connecting steel cylinder 4, the steel hoop 6 and the beam column through the grouting assembly 7 and vibrate to make it dense;

[0053] Step 8: After the concrete in the core area of ​​the beam and column reaches the preset strength, the formwork is removed and the next solid prefabricated column 1 is hoisted and installed.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled reinforced concrete beam-column connection node, characterized in that: It comprises an upper connecting steel cylinder (3), a lower connecting steel cylinder (4), a solid prefabricated column (1) and a structural beam (2), wherein the cross-sectional shapes of the upper connecting steel cylinder (3) and the lower connecting steel cylinder (4) both match the cross-sectional shape of the solid prefabricated column (1), and the two are respectively fixed to the ends of the column longitudinal reinforcement (101) of the solid prefabricated column (1) at the upper and lower sides of the beam-column core area; A connecting steel (5) is embedded at the bottom end of the upper solid prefabricated column (1) in the core area of ​​the beam and column, and the end of the connecting steel (5) is welded and connected to the sealing plate of the upper connecting steel cylinder (3); The column longitudinal reinforcement (101) in the solid prefabricated column (1) at the lower part of the beam-column core area vertically penetrates the beam-column core area and extends to the top of the beam-column core area, and diagonal bracing steel bars (11) are fixedly arranged between the column longitudinal reinforcements (101) in the beam-column core area; The column stirrups (102) at the ends of the solid prefabricated columns (1) and in the core areas of the beams and columns are densely arranged; The peripheral wall of the lower connecting steel cylinder (4) extends beyond the bottom sealing plate thereof by a certain distance to form a steel hoop (6), and the bottom end of the steel hoop (6) is arranged correspondingly at the top of the core area of ​​the beam column, and the openings of the upper connecting steel cylinder (3) and the lower connecting steel cylinder (4) are opposite to each other and are welded and sealed at the joint; The upper connecting steel cylinder (3), the lower connecting steel cylinder (4), the steel hoop (6) and the internal space of the beam-column core area are connected to each other, and the upper connecting steel cylinder (3), the lower connecting steel cylinder (4), the steel hoop (6) and the internal space of the beam-column core area are filled with concrete through a grouting assembly (7).

2. The assembled reinforced concrete beam-column connection node according to claim 1, characterized in that: An additional steel bar (8) is arranged at the top of the solid prefabricated column (1) at the lower part of the beam-column core area. The additional steel bar (8) is arranged correspondingly on the inner side of the column longitudinal bar (101), and one end of the steel bar body is embedded in the concrete of the solid prefabricated column (1), and the other end vertically penetrates the beam-column core area and is fixed to the lower connecting steel cylinder (4).

3. The assembled reinforced concrete beam-column connection node according to claim 2, characterized in that: An anchor plate (9) is fixedly provided at one end of the additional steel bar (8) embedded in the solid prefabricated column (1).

4. The assembled reinforced concrete beam-column connection node according to claim 1, characterized in that: The grouting assembly (7) comprises a grouting hole (701) and an exhaust hole (703) provided at the sealing plate of the upper connecting steel cylinder (3), and a grouting hole (705) provided at the sealing plate of the lower connecting steel cylinder (4). A grouting pipe (702) and an exhaust pipe (704) are installed in the grouting hole (701) and the exhaust hole (703), respectively. The grouting pipe (702) and the exhaust pipe (704) are both pre-buried in the upper solid prefabricated column (1) of the core area of ​​the beam and column. The grouting pipe (702) and the exhaust pipe (704) connect the closed abdominal cavity formed by the upper connecting steel cylinder (3) and the lower connecting steel cylinder (4) with the outside world, and the grouting hole (705) connects the spaces on the upper and lower sides of the sealing plate of the lower connecting steel cylinder (4).

5. The assembled reinforced concrete beam-column connection node according to claim 1, characterized in that: The connecting steel (5) is a cross-shaped steel with flanges, and the setting height of the cross-shaped steel with flanges is not less than half of the long side dimension of the cross section of the solid prefabricated column (1).

6. The assembled reinforced concrete beam-column connection node according to claim 1, characterized in that: The length of the densified section of the column stirrup (102) is not less than the long side dimension of the cross section of the solid prefabricated column (1).

7. The assembled reinforced concrete beam-column connection node according to claim 1, characterized in that: The total height of the upper connecting steel cylinder (3) and the lower connecting steel cylinder (4) is 10-50 cm.

8. The assembled reinforced concrete beam-column connection node according to claim 1, characterized in that: The height of the steel hoop (6) is 3-15 cm.

9. A method for constructing a prefabricated reinforced concrete beam-column connection node, applied to the construction process of a prefabricated reinforced concrete beam-column connection node as claimed in any one of claims 1 to 8, characterized in that: The steps include: Step 1: manufacturing a solid prefabricated column (1), and fixing the diagonal bracing steel bars (11), the upper connecting steel cylinder (3) and the lower connecting steel cylinder (4) in advance at the joint section of the column longitudinal reinforcement (101); Step 2: Install the solid prefabricated column (1) at the lower part of the core area of ​​the beam and column in place; Step 3, constructing the structural beam (2); Step 4: hoist the solid prefabricated column (1) at the upper part of the core area of ​​the beam and column into place, so that the openings of the upper connecting steel cylinder (3) and the lower connecting steel cylinder (4) are aligned; Step 5, rechecking the position of the solid prefabricated column (1) at the upper part of the core area of ​​the beam and column, and welding and fixing the upper connecting steel cylinder (3) and the lower connecting steel cylinder (4) at the joint between the two; Step 6: Support the formwork of the core area of ​​beams and columns; Step seven, pouring concrete into the upper connecting steel cylinder (3), the lower connecting steel cylinder (4), the steel hoop (6) and the inner space of the core area of ​​the beam and column through the grouting assembly (7) and vibrating to make it dense; Step 8: After the concrete in the core area of ​​the beam and column reaches the preset strength, the formwork is removed and the next solid prefabricated column (1) is hoisted and installed.

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