A prefabricated beam-column connection node and its construction method

Abstract

This invention discloses a prefabricated beam-column connection node and its construction method, belonging to the field of prefabricated building technology. The prefabricated beam-column connection node includes a connector, fasteners, an upper prefabricated column, a lower prefabricated column, and a crossbeam. The connector is a tubular structure with open top and bottom, forming an upper inner cavity, a middle inner cavity, and a lower inner cavity within its inner cavity. Grouting anchor holes are provided on the tube wall of the middle inner cavity. Fasteners are fixed to the outer wall of the connector. The lower end of the upper prefabricated column extends into the upper inner cavity of the connector and is bolted to the connector. The upper end of the lower prefabricated column extends into the lower inner cavity of the connector and is bolted to the connector. One end of the crossbeam is provided with grouting anchor bars, which pass through the grouting anchor bar holes, and the crossbeam is bolted to the fasteners. The middle cavity of the connector is filled with cement-based grout, which anchors the grouting anchor bars to the connector. This prefabricated beam-column connection node can be formed through assembly, reducing construction difficulty and improving construction efficiency.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated building technology, specifically relating to a prefabricated beam-column connection node and its construction method. Background Technology

[0002] Currently, traditional beam-column joints are completed using cast-in-place reinforced concrete construction technology. However, this technology has many problems that urgently need to be addressed, such as slow construction speed, high labor intensity, large number of workers required, and significant building pollution.

[0003] With the development of industry, buildings are moving towards prefabricated construction, which has advantages such as fast construction speed, good construction quality, less construction difficulty, and fewer workers. Summary of the Invention

[0004] In view of this, the present invention provides a prefabricated beam-column connection node and its construction method, which solves the problems of slow construction speed, high labor intensity, large number of workers, and high building pollution of traditional beam-column connection nodes.

[0005] The present invention adopts the following technical solution:

[0006] A prefabricated beam-column connection node includes connectors, fasteners, an upper prefabricated column, a lower prefabricated column, and a crossbeam;

[0007] The connector is a tubular structure with open top and bottom. An upper partition and a lower partition are spaced apart within the inner cavity of the connector, forming an upper inner cavity, a middle inner cavity, and a lower inner cavity. A grouting hole is provided at the bottom of the outer wall of the middle inner cavity. A grout outlet hole is provided on the upper partition. Bolt holes are provided on the walls of both the upper and lower inner cavities. Grout anchoring reinforcement holes are provided on the wall of the middle inner cavity.

[0008] The fastener is fixed to the outer wall of the connector;

[0009] The lower end of the upper precast column extends into the upper inner cavity of the connector and is bolted to the connector;

[0010] The upper end of the lower precast column extends into the lower inner cavity of the connector and is bolted to the connector;

[0011] One end of the crossbeam is provided with a grouted anchor bar extending longitudinally along the crossbeam, and the grouted anchor bar passes through the grouted anchor bar hole; and the end of the crossbeam provided with the grouted anchor bar is also provided with a crossbeam bolt hole; the crossbeam is bolted to the fastener through the crossbeam bolt hole.

[0012] The central cavity of the connector is filled with cement-based grout injected through the grouting hole, and the cement-based grout anchors the anchored steel bars to the connector.

[0013] Furthermore, the upper precast column and the lower precast column have the same structure, and both the upper precast column and the lower precast column are provided with a boss with bolt holes at the end where they are connected to the connector;

[0014] The bosses of the upper precast column and the lower precast column respectively extend into the upper inner cavity and the lower inner cavity of the connector, and are fixed to the connector by bolts.

[0015] Furthermore, the fastener comprises two angle steel pieces with bolt holes;

[0016] The two angle steel pieces are symmetrically fixed to the outer wall of the connector;

[0017] One end of the crossbeam connected to the connector is clamped between the two angle steels, and the crossbeam is bolted to the two angle steels through the crossbeam bolt holes.

[0018] Furthermore, one side of the angle steel located above the crossbeam and one end of the upper precast column extending into the upper inner cavity are connected by bolts;

[0019] One side of the angle steel located below the crossbeam and one end of the lower precast column extending into the lower inner cavity are connected by bolts.

[0020] Furthermore, the fastener includes a steel plate with bolt holes and an angle steel with bolt holes;

[0021] One side of the steel plate is welded to the connector, so that the steel plate is in a horizontal state;

[0022] One side of the angle steel is fixed to the connector, and the bolt holes on the other side are parallel to the bolt holes on the steel plate.

[0023] One end of the crossbeam connected to the connector is clamped between the steel plate and the angle steel, and the crossbeam is bolted to the steel plate and the angle steel through the crossbeam bolt holes.

[0024] Furthermore, one side of the angle steel and one end of the lower precast column that extends into the lower inner cavity are connected by bolts.

[0025] Furthermore, the connector, the upper precast column, the lower precast column, and the crossbeam are all square.

[0026] The present invention provides a construction method for a prefabricated beam-column connection node, based on the above-mentioned prefabricated beam-column connection node, comprising the following steps:

[0027] Step 1: Prepare the connectors and fasteners, and prefabricate the upper prefabricated column, the lower prefabricated column, and the crossbeam;

[0028] Step 2: Transport the upper precast column, the lower precast column, the crossbeam, the connector, and the fastener to the construction site;

[0029] Step 3: Hoist the precast column to the designed position;

[0030] Step 4: Fit the connector onto the lower precast column boss and connect it with bolts, and then fix the fastener to the connector;

[0031] Step 5: Hoist the crossbeam so that the grout anchoring steel bars of the crossbeam pass through the grout anchoring steel bar holes of the connector. The end face of the crossbeam with the grout anchoring steel bars is in contact with the outer wall of the inner cavity of the connector. The crossbeam is bolted to the fastener through the crossbeam bolt holes.

[0032] Step 6: Inject cement-based grout into the central cavity of the connector through the grouting hole until the cement-based grout flows out from the grout outlet hole, so that the grout anchoring steel bar is grout anchored to the connector;

[0033] Step 7: Hoist the upper precast column so that the upper precast column boss extends into the upper inner cavity of the connector and is connected with bolts.

[0034] Beneficial effects:

[0035] (1) The connector is a tubular structure with open top and bottom. An upper and lower partition are spaced apart within the connector's inner cavity, forming an upper, middle, and lower inner cavity. A grouting hole is located at the bottom of the outer wall of the middle inner cavity. A grout outlet hole is located on the upper partition. Bolt holes are located on the walls of both the upper and lower inner cavities. Grout anchoring reinforcement holes are located on the wall of the middle inner cavity. Fasteners are fixed to the outer wall of the connector. The lower end of the upper precast column extends into the upper inner cavity of the connector. The lower precast column extends into the lower inner cavity of the connector and is bolted to it. One end of the crossbeam has a grout-anchored steel bar extending longitudinally along the crossbeam, passing through a grout-anchored steel bar hole. The end of the crossbeam with the grout-anchored steel bar also has a bolt hole. The crossbeam is bolted to fasteners through these bolt holes. The central cavity of the connector is filled with cement-based grout injected through grouting holes, which anchors the grout-anchored steel bar to the connector. In this way, the beam-column joint can be formed by assembly, reducing construction difficulty and improving construction efficiency. Furthermore, the upper and lower diaphragms within the inner cavity of the connector improve the stress distribution of the connector, enhancing the seismic performance of the beam-column joint.

[0036] (2) The upper and lower precast columns have the same structure, and both the upper and lower precast columns have a boss with a bolt hole at the end where they connect to the connector. The bosses of the upper and lower precast columns extend into the upper and lower inner cavities of the connector, respectively, and are fastened to the connector with bolts. In this way, the upper and lower precast columns can be quickly connected by bolts simply by extending the bosses into the inner cavities of the connector, making the upper and lower structures of the beam-column joint symmetrical and the assembly more convenient and faster.

[0037] (3) The fastener includes two angle steels with bolt holes; the two angle steels are symmetrically fixed to the outer wall of the connector; one end of the beam connected to the connector is sandwiched between the two angle steels, and the beam is bolted to the two angle steels through the bolt holes of the beam. In this way, the connection between the beam and the connector can be easily reinforced by angle steels, which can enhance the structural stiffness of the beam-column joint and improve its seismic performance.

[0038] (4) The fastener includes a steel plate with bolt holes and an angle steel with bolt holes; one side of the steel plate is welded to the connector, making the steel plate horizontal; one side of the angle steel is fixed to the connector, and the bolt holes on the other side are parallel to the bolt holes on the steel plate; the end of the crossbeam connected to the connector is sandwiched between the steel plate and the angle steel, and the crossbeam is bolted to the steel plate and the angle steel through the crossbeam bolt holes. In this way, the combination of steel plate and angle steel makes the selection of fasteners more convenient.

[0039] (5) One side of the angle steel and the end of the lower precast column that extends into the lower cavity of the connector are connected by bolts. In this way, while fixing the lower precast column to the connector, the angle steel to the connector is also fixed, which simplifies the beam-column joint structure and improves the construction speed.

[0040] (6) The connectors, upper precast columns, lower precast columns, and beams are all square. This makes the bolt connection in the beam-column joint more convenient and reliable. Attached Figure Description

[0041] Figure 1 A front view of a precast column provided in an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram illustrating the installation of a connector and fastener according to an embodiment of the present invention.

[0043] Figure 3 for Figure 2 A three-dimensional structural diagram of the connecting component;

[0044] Figure 4 This is a three-dimensional structural schematic diagram of a precast column provided in an embodiment of the present invention;

[0045] Figure 5A three-dimensional structural schematic diagram of a beam provided in an embodiment of the present invention;

[0046] Figure 6 for Figure 2 A three-dimensional structural diagram of a steel plate;

[0047] Figure 7 for Figure 2 A three-dimensional structural diagram of a medium angle steel;

[0048] Among them, 1-connector, 101-grouting hole, 102-grout outlet hole, 103-grout anchor bar hole, 104-lower bolt hole of connector; 2-fastener, 201-steel plate, 202-angle steel; 3-upper precast column, 301-upper precast column boss; 4-lower precast column, 4-lower precast column boss; 5-beam, 501-grout anchor bar, 502-beam bolt hole. Detailed Implementation

[0049] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0050] Example 1:

[0051] like Figures 1-7 As shown, a beam-column joint includes a connector 1, a fastener 2, an upper precast column 3, a lower precast column 4, and a crossbeam 5, wherein:

[0052] The connector 1 is a tubular structure with open top and bottom. An upper and lower partition are spaced apart within the inner cavity of the connector 1, forming an upper inner cavity, a middle inner cavity, and a lower inner cavity. A grouting hole 101 is provided on the lower part of the outer wall of the middle inner cavity. A grout outlet hole 102 is provided on the upper partition. Bolt holes are provided on the walls of both the upper and lower inner cavities (bolt holes on the upper inner cavity wall are not shown). Grout anchoring reinforcement holes 103 are provided on the wall of the middle inner cavity. Fasteners 2 are fixed to the outer wall of the connector 1. The lower end of the upper precast column 3 extends into the upper inner cavity of the connector 1 and is bolted to the connector 1 through the bolt holes on the upper inner cavity wall. The upper end of the lower precast column 4 extends into the lower inner cavity of the connector 1 and is bolted to the connector 1 through the bolt holes on the lower inner cavity wall. The connection is as follows: One end of the crossbeam 5 in the longitudinal direction (let the length direction of the crossbeam 5 be its longitudinal direction) is provided with a grout anchoring steel bar 501 extending along the longitudinal direction of the crossbeam 5. The grout anchoring steel bar 501 passes through the grout anchoring steel bar hole 103. Correspondingly, the end face of the crossbeam 5 with the grout anchoring steel bar 501 is in contact with the outer wall of the inner cavity of the connector 1. Moreover, the end of the crossbeam 5 with the grout anchoring steel bar 501 is also provided with a crossbeam bolt hole 502 along the height direction. The crossbeam 5 is bolted to the fastener 2 through the crossbeam bolt hole 502. The middle cavity of the connector 1 is filled with cement-based grout injected through the grouting hole 101 (after the cement-based grout fills the middle cavity, it flows out from the grout outlet hole 102 to ensure that the middle inner cavity is filled with cement-based grout). The cement-based grout anchors the grout anchoring steel bar 501 to the connector 1.

[0053] In this way, the beam-column joint can be formed by assembly, reducing construction difficulty and improving construction efficiency. Moreover, the upper and lower diaphragms installed in the inner cavity of connector 1 improve the stress distribution of the connector and enhance the seismic performance of the beam-column joint.

[0054] In this embodiment, the upper precast column 3 and the lower precast column 4 have identical structures, and each end of the upper precast column 3 and the lower precast column 4 connected to the connector 1 is provided with a boss with bolt holes, referred to as the upper precast column boss 301 and the lower precast column boss 401, respectively. The upper precast column 3 and the lower precast column 4 extend into the upper and lower inner cavities of the connector 1 through the upper precast column boss 301 and the lower precast column boss 401, respectively, and are fixed to the connector 1 by bolts. In this way, it is only necessary to extend the bosses of the upper precast column 3 and the lower precast column 4 into the inner cavity of the connector 1 to quickly connect them by bolts, making the upper and lower structures of the beam-column joint symmetrical and making assembly more convenient and faster.

[0055] In one possible embodiment, the fastener 2 includes two angle steels 202 with bolt holes, which are symmetrically fixed to the outer wall of the connector 1. One end of the beam 5, which connects to the connector 1, is sandwiched between the two angle steels 202, and the beam 5 is bolted to the two angle steels 202 through the beam bolt holes 502. Thus, the connection between the beam 5 and the connector 1 can be easily reinforced using the angle steels 202, thereby enhancing the structural stiffness of the beam-column joint and improving its seismic performance.

[0056] In another possible embodiment, the fastener 2 includes a steel plate 201 with bolt holes and an angle steel 202 with bolt holes. One side of the steel plate 201 is welded to the connector, making the steel plate 201 horizontal. One side of the angle steel 202 is fixed to the connector 1 (e.g., by welding or bolting), and the bolt holes on the other side are parallel to the bolt holes on the steel plate 201. For example, refer to... Figure 2 , Figure 4 and Figure 7 Align one bolt hole of angle steel 202 with the bolt hole of bolt hole 104 on the lower part of connector and connect with bolts; the end of crossbeam 5 connected to connector 1 is clamped between steel plate 201 and angle steel 202, and crossbeam 5 is bolted to steel plate 201 and angle steel 201 through crossbeam bolt hole 502.

[0057] When the fastener 2 is made of angle steel 202, one side of the angle steel 202 and one end of the upper precast column 3 / lower precast column 4 that extends into the upper / lower inner cavity of the connector 1 are connected by bolts. In this way, while the upper precast column 3 / lower precast column 4 is fixedly connected to the connector 1, the angle steel 202 is also fixedly connected to the connector 1, which simplifies the beam-column joint structure and improves the construction speed.

[0058] It is understandable that the fastener 2 is not limited to the steel plate 201 and angle steel 202 mentioned above. Other fasteners such as brackets can also be selected, as long as they can serve to fasten the connection between the crossbeam 5 and the connector 1.

[0059] In this embodiment, the connector 1, the upper precast column 3, the lower precast column 4, and the crossbeam 5 are all square. Correspondingly, the upper inner cavity, the middle inner cavity, and the lower inner cavity are all square, and the upper precast column boss 301 and the lower precast column boss 4 are also square. This makes the bolt connection in the beam-column joint more convenient and reliable.

[0060] When the other side of the connector 1 also needs to be connected to the crossbeam 5, the grouted anchor bars 501 of the two symmetrically positioned crossbeams 5 can be interwoven. Specifically, at this time, a crossbeam grouted anchor bar hole needs to be set on the end face of the crossbeam 5 where the grouted anchor bar 501 extends, and the grouted anchor bar 501 of the crossbeam 5 is inserted into the crossbeam grouted anchor bar hole 103 on the connector 1 after passing through the grouted anchor bar hole 103 on the connector 1. In this way, the seismic performance of the beam-column joint can be further improved.

[0061] Example 2:

[0062] This embodiment provides a construction method for the prefabricated beam-column connection node in Embodiment 1, including the following steps:

[0063] Step 1: Prepare connector 1 and fastener 2, and prefabricate the upper precast column 3, lower precast column 4, and crossbeam 5 in the factory;

[0064] Step 2: Transport the upper precast column 3, lower precast column 4, crossbeam 5, connector 1 and fastener 2 to the construction site;

[0065] Step 3: Hoist the lower precast column 4 to the designed position;

[0066] Step 4: Fit connector 1 onto the lower precast column boss 4 and connect it with bolts, and fix fastener 2 to connector 1;

[0067] Step 5: Hoist the crossbeam 5 so that the grout anchor steel bar 501 of the crossbeam 5 passes through the grout anchor steel bar hole 103 of the connector 1. The end face of the crossbeam 5 with the grout anchor steel bar 501 is in contact with the outer wall of the inner cavity of the connector 1. The crossbeam 5 is bolted to the fastener 2 through the crossbeam bolt hole 502.

[0068] Step 6: Inject cement-based grout into the inner cavity of the connector 1 through the grouting hole 101 to connect the grout anchor steel bar with the connector until the cement-based grout flows out from the grout outlet hole 102.

[0069] Step 7: Hoist the precast column 3 so that the upper precast column boss 301 extends into the upper inner cavity of the connector 1 and is connected with bolts.

[0070] Understandably, in the above construction method, depending on the type of fastener 2 and the method of fastening fastener 2 to connector 1, one can flexibly choose whether to fasten fastener 2 to connector 1 in the factory or on the construction site. For example, if steel plate 201 is selected as fastener 1, it can be welded to connector 1 in the factory. If angle steel 202 is selected as fastener 2, it can be bolted to connector 1 on the construction site. This construction method mainly ensures the following construction sequence: first, the lower precast column 4, connector 1, beam 5, and fastener 2 are connected according to the method in Example 1; then, cement-based grout is injected through the grouting holes to anchor beam 5 to connector 1; finally, the upper precast column 3 and connector 1 are bolted together.

[0071] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A prefabricated beam-column connection node, characterized in that, Includes connectors, fasteners, upper precast columns, lower precast columns, and crossbeams; The connector is a tubular structure with open top and bottom. An upper partition and a lower partition are spaced apart within the inner cavity of the connector, forming an upper inner cavity, a middle inner cavity, and a lower inner cavity. A grouting hole is provided at the bottom of the outer wall of the middle inner cavity. A grout outlet hole is provided on the upper partition. Bolt holes are provided on the walls of both the upper and lower inner cavities. Grout anchoring reinforcement holes are provided on the wall of the middle inner cavity. The fastener is fixed to the outer wall of the connector; The lower end of the upper precast column extends into the upper inner cavity of the connector and is bolted to the connector; The upper end of the lower precast column extends into the lower inner cavity of the connector and is bolted to the connector; One end of the crossbeam is provided with a grouted anchor bar extending longitudinally along the crossbeam, and the grouted anchor bar passes through the grouted anchor bar hole; and the end of the crossbeam provided with the grouted anchor bar is also provided with a crossbeam bolt hole; the crossbeam is bolted to the fastener through the crossbeam bolt hole. The central cavity of the connector is filled with cement-based grout injected through the grouting hole, and the cement-based grout anchors the anchored steel bars to the connector. Furthermore, both the upper precast column and the lower precast column are provided with a boss with bolt holes at the end where they connect to the connector; The protrusions of the upper precast column and the lower precast column respectively extend into the upper inner cavity and the lower inner cavity of the connector, and are fixed to the connector by bolts; When the other side of the connector also needs to be connected to a crossbeam, the grouted anchor bars of the two symmetrically positioned crossbeams are interwoven.

2. The prefabricated beam-column connection node according to claim 1, characterized in that, The upper precast column has the same structure as the lower precast column.

3. The prefabricated beam-column connection node according to claim 1, characterized in that, The fastener comprises two angle steel pieces with bolt holes; The two angle steel pieces are symmetrically fixed to the outer wall of the connector; One end of the crossbeam connected to the connector is clamped between the two angle steels, and the crossbeam is bolted to the two angle steels through the crossbeam bolt holes.

4. A prefabricated beam-column connection node according to claim 3, characterized in that, One side of the angle steel located above the crossbeam and one end of the upper precast column extending into the upper inner cavity are connected by bolts; One side of the angle steel located below the crossbeam and one end of the lower precast column extending into the lower inner cavity are connected by bolts.

5. A prefabricated beam-column connection node according to claim 1, characterized in that, The fastener includes a steel plate with bolt holes and an angle steel with bolt holes; One side of the steel plate is welded to the connector, so that the steel plate is in a horizontal state; One side of the angle steel is fixed to the connector, and the bolt holes on the other side are parallel to the bolt holes on the steel plate. One end of the crossbeam connected to the connector is clamped between the steel plate and the angle steel, and the crossbeam is bolted to the steel plate and the angle steel through the crossbeam bolt holes.

6. A prefabricated beam-column connection node according to claim 5, characterized in that, One side of the angle steel and one end of the lower precast column that extends into the lower inner cavity are connected by bolts.

7. A prefabricated beam-column connection node according to any one of claims 1-4, characterized in that, The connector, the upper precast column, the lower precast column, and the crossbeam are all square.

8. A construction method for a prefabricated beam-column connection node, characterized in that, The prefabricated beam-column connection node according to any one of claims 1-7 includes the following steps: Step 1: Prepare the connectors and fasteners, and prefabricate the upper prefabricated column, the lower prefabricated column, and the crossbeam; Step 2: Transport the upper precast column, the lower precast column, the crossbeam, the connector, and the fastener to the construction site; Step 3: Hoist the precast column to the designed position; Step 4: Fit the connector onto the lower precast column boss and connect it with bolts, and then fix the fastener to the connector; Step 5: Hoist the crossbeam so that the grout anchoring steel bars of the crossbeam pass through the grout anchoring steel bar holes of the connector. The end face of the crossbeam with the grout anchoring steel bars is in contact with the outer wall of the inner cavity of the connector. The crossbeam is bolted to the fastener through the crossbeam bolt holes. Step 6: Inject cement-based grout into the central cavity of the connector through the grouting hole until the cement-based grout flows out from the grout outlet hole, so that the grout anchoring steel bar is grout anchored to the connector; Step 7: Hoist the upper precast column so that the upper precast column boss extends into the upper inner cavity of the connector and is connected with bolts.

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