Beam-column connection node structure of precast beam and hidden bracket precast column

Abstract

The utility model provides a beam-column connecting joint structure of a precast beam and a hidden bracket precast column, and relates to the technical field of fabricated building structures. The beam-column connecting joint structure comprises a prefabricated column, the side face of the prefabricated column is provided with a joint area used for being spliced with a prefabricated beam, a hidden bracket is arranged at the bottom of the joint area, and a first column side steel connecting piece is embedded in the joint area of the prefabricated column and located at the top of the hidden bracket; a second column side steel connecting piece is pre-buried in the hidden bracket; the end of the prefabricated beam is provided with a joint end used for being spliced with the prefabricated column, the prefabricated beam is a notch beam with a concave part and a convex part formed at the joint end, the concave part is matched with the hidden bracket, a first beam side steel connecting piece is embedded in the convex part and used for being welded and fixed to the first column side steel connecting piece, and a second beam side steel connecting piece is embedded in the convex part and used for being welded and fixed to the second column side steel connecting piece. A second beam side steel connecting piece is embedded in the concave part and used for being welded and fixed to the second column side steel connecting piece.

Description

Technical Field

[0001] This application relates to the field of prefabricated building structure technology, and in particular to a beam-column connection node structure of a precast beam and a precast column with a hidden corbel. Background Technology

[0002] Precast concrete frame structures refer to structural systems formed by assembling and connecting precast concrete components on the construction site. They are mainly composed of precast beams, columns, and other components, which are produced in factories using high-precision molds and processes to ensure the dimensional accuracy and quality stability of the components.

[0003] For prefabricated concrete frame structures, the commonly used prefabricated frame structure systems are relatively simple and lack diversity.

[0004] Currently, the most commonly used method is the prefabricated monolithic frame structure, which involves rigidly connecting precast frame columns and composite beams by tying reinforcing bars at joints and then pouring concrete. This connection method can achieve the same load-bearing performance as cast-in-place structures and has good seismic performance. However, it also presents challenges such as the need for exposed reinforcement during precasting, dense and complex reinforcement in the beam-column connection area, extensive wet concrete work on site, and the need for temporary supports. Although the overall construction cost is lower, on-site construction is difficult, involves a large amount of manual labor, and has a long construction period.

[0005] Therefore, there is an urgent need to provide a node structure that can reduce on-site concrete work, effectively shorten the construction cycle, and make beam-column joint installation and connection convenient and quick. Utility Model Content

[0006] The purpose of this application is to provide a beam-column connection node structure for precast beams and precast columns with hidden corbels, so as to reduce on-site concrete work, effectively shorten the construction cycle, and make the beam-column node installation and connection convenient and quick.

[0007] To address the aforementioned technical problems, this application provides the following technical solutions:

[0008] This application provides a beam-column connection node structure for a precast beam and a precast column with a hidden corbel. The beam-column connection node structure includes: a precast column with a node area on its side for splicing with a precast beam, a hidden corbel at the bottom of the node area, a first column-side steel connector embedded in the node area of ​​the precast column and at the top of the hidden corbel, and a second column-side steel connector embedded in the hidden corbel.

[0009] A precast beam has a node end for splicing with the precast column. The precast beam is a notched beam with a concave and a convex portion formed at the node end. The concave portion is adapted to the hidden corbel. The convex portion has a first beam side steel connector embedded in it for welding and fixing with the first column side steel connector. The concave portion has a second beam side steel connector embedded in it for welding and fixing with the second column side steel connector.

[0010] The filling part fills the joint gap formed between the node area of ​​the precast column and the node end of the precast beam after they are spliced ​​together, and the outer wall surface of the filling part is flush with the outer wall surface of the precast beam.

[0011] In some modified embodiments of this application, the first column-side steel connector includes:

[0012] Two connecting base plates are arranged longitudinally opposite each other and spaced apart. Each of the four corners of the connecting base plates is provided with a clearance notch so that the connecting base plates form a cross-shaped plate with four connecting ends.

[0013] Four connecting side plates are respectively connected to the connecting ends of the two connecting base plates. The connecting side plates are perpendicular to the connecting base plates, and the outer surfaces of the connecting side plates are exposed in the node area.

[0014] The first beam side steel connector is partially exposed outside the protrusion and is welded and fixed to the outer side of the connecting side plate.

[0015] In some modified embodiments of this application, the two ends of the connecting side plate extend beyond the corresponding connecting base plate by a preset distance in the longitudinal direction;

[0016] The inner surface of the portion of the connecting side plate extending beyond the connecting base plate is provided with a plurality of stiffening ribs. The plurality of stiffening ribs are distributed at intervals along the edges of the corresponding connecting ends, and each stiffening rib is perpendicular to and fixed to the connecting side plate and the connecting base plate.

[0017] In some modified embodiments of this application, a stiffening beam is connected to the side of the plurality of stiffening ribs opposite to the connecting side plate, and the stiffening beam is vertical and fixed to the connecting base plate.

[0018] In some modified embodiments of this application, the two ends of the connecting side plate in the longitudinal direction are flush with the end faces of the corresponding stiffening ribs and stiffening beams, respectively.

[0019] In some modified embodiments of this application, at least one vent hole is provided along the longitudinal direction on the connecting base plate.

[0020] In some modified embodiments of this application, the first beam side steel connector includes: a first top plate and a first web plate vertically disposed at the bottom of the first top plate, wherein the first top plate and the first web plate are flush with the end face away from the precast beam.

[0021] In some modified embodiments of this application, the second column-side steel connector is partially exposed outside the concealed corbel. The second column-side steel connector includes: a first base plate and a second web plate vertically disposed on the top of the first base plate. The first base plate and the second web plate are flush with the end face away from the precast column.

[0022] The bottom side of the first base plate is anchored to the precast column by multiple anchoring steel bars.

[0023] In some modified embodiments of this application, the second beam side steel connector includes: a second base plate and a third web plate vertically disposed on the top of the second base plate, and the positions and dimensions of the second beam side steel connector and the second column side steel connector are respectively corresponding and adapted.

[0024] In some modified embodiments of this application, the precast column is internally arranged with a plurality of longitudinal steel bars, and the plurality of longitudinal steel bars are distributed in the avoidance gap of the connecting base plate in part corresponding to the node area;

[0025] Several stirrups are tied to the outside of the longitudinal steel bars. The stirrups are distributed at intervals along the longitudinal direction. The stirrups corresponding to the node area are arranged on the inner side of the connecting side plate.

[0026] Compared to existing technologies, the beam-column connection structure of the precast beam and concealed corbel precast column provided in this application features a concealed corbel in the precast column and a notched beam in the matching precast beam, which allows for convenient overlapping without the need for temporary supports, simplifying the construction process. Furthermore, steel connectors are correspondingly installed in the node area of ​​the precast column and at the node end of the precast beam, and convenient connection is achieved through welding of the corresponding steel connectors. This enhances the seismic resistance of the structure and reduces on-site work. Only a small amount of formwork is required at the post-cast node, resulting in less on-site wet work, which can effectively improve construction efficiency and is conducive to energy conservation, emission reduction, and environmental protection. At the same time, the connection of the filling part can prevent the steel connectors from being exposed, eliminating the need for anti-corrosion and fireproofing treatment. Attached Figure Description

[0027] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein:

[0028] Figure 1The diagram illustrates the structural design of the beam-column connection node between the precast beam and the precast column with concealed corbel provided in this embodiment of the present invention.

[0029] Figure 2 The diagram illustrates the structure of the precast column with the beam-column connection node between the precast beam and the precast column with the hidden corbel provided in the embodiment of the present invention.

[0030] Figure 3 schematically shown Figure 2 A schematic diagram of the cross-sectional structure of section AA in the diagram;

[0031] Figure 4 schematically shown Figure 2 A schematic diagram of the cross-sectional structure of section BB in the diagram;

[0032] Figure 5 The diagram illustrates the structure of the first column-side steel connector for the beam-column connection node of the precast beam and the hidden corbel precast column provided in this embodiment of the present invention.

[0033] Figure 6 The diagram illustrates the structure of the precast beam with the beam-column connection node between the precast beam and the precast column with the hidden corbel provided in this embodiment of the present invention.

[0034] Figure 7 schematically shown Figure 2 A schematic diagram of the cross-sectional structure of section CC in the diagram;

[0035] Figure 8 schematically shown Figure 2 A schematic diagram of the cross-sectional structure of section DD in the diagram;

[0036] Explanation of icon numbers:

[0037] 1. Precast column; 11. Concealed corbel; 12. First column side steel connector; 121. Connecting base plate; 1211. Avoidance notch; 1212. Ventilation hole; 122. Connecting side plate; 123. Stiffening rib; 124. Stiffening beam; 13. Second column side steel connector; 131. First base plate; 132. Second web plate; 14. Longitudinal reinforcement; 15. Stirrups; 16. Anchor reinforcement;

[0038] 2. Precast beam; 201. Recess; 202. Protrusion; 21. First beam side steel connector; 211. First top plate; 212. First web; 22. Second beam side steel connector; 221. Second bottom plate; 222. Third web; 23. Upper longitudinal reinforcement; 24. Lower longitudinal reinforcement;

[0039] 3. Filling section. Detailed Implementation

[0040] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0041] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains.

[0042] Example

[0043] Reference Appendix Figure 1 -Appendix Figure 8 This utility model provides a beam-column connection node structure for a precast beam 2 and a precast column with a hidden corbel. The beam-column connection node structure includes: a precast column 1 with a node area on its side for splicing with the precast beam 2; a hidden corbel 11 at the bottom of the node area; a first column-side steel connector 12 embedded in the node area of ​​the precast column 1 and at the top of the hidden corbel 11; and a second column-side steel connector 13 embedded in the hidden corbel 11; and a precast beam 2 with a node end for splicing with the precast column 1, wherein the precast beam 2 is formed at the node end. The beam has a notched section 201 and a protrusion 202. The notched section 201 is adapted to the hidden corbel 11. The protrusion 202 has a first beam-side steel connector 21 embedded in it for welding and fixing with the first column-side steel connector 12. The notched section 201 has a second beam-side steel connector 22 embedded in it for welding and fixing with the second column-side steel connector 13. The beam also has a filling section 3, which fills the splicing gap formed between the node area of ​​the precast column 1 and the node end of the precast beam 2 after splicing. The outer wall surface of the filling section 3 is flush with the outer wall surface of the precast beam 2.

[0044] Specifically, the beam-column connection node structure provided in this embodiment constitutes a prefabricated concrete frame structure, which is formed by splicing the node area of ​​the precast column 1 and the node end of the precast beam 2. The precast column 1 in the beam-column connection node provided in this embodiment has a hidden corbel 11, and the matching precast beam 2 is a notched beam, which can realize convenient overlap and convenient connection through welding of corresponding steel connectors, which can enhance the seismic resistance of the structure.

[0045] The precast column 1 can be a cubic column structure with a rectangular cross-section and extending longitudinally. Its bottom end can be fixed to a predetermined position on the construction site, such as the bottom end of the precast column 1 can be fixed to the foundation or to other precast columns 1. The precast column 1 is a longitudinal load-bearing member that can effectively transfer the weight of the building to the foundation. At least one side of the precast column 1 has a node area for splicing with the precast beam 2, and the bottom part of the node area is provided with a hidden corbel 11. The hidden corbel 11 is a structure that protrudes outward relative to the side of the precast column 1. Its shape can be a cubic structure. The hidden corbel 11 can play a role in supporting the precast beam 2 during the splicing process of the precast column 1 and the precast beam 2. Therefore, there is no need to set up temporary supports, which can simplify the construction process. Moreover, it is not exposed after the precast column 1 and the precast beam 2 are spliced, which can improve the aesthetics.

[0046] Each precast column 1 may include more than one node in the longitudinal direction for splicing with the precast beam 2. Taking the precast column 1 as a cubic column structure with a rectangular cross section and extending longitudinally as an example, the four sides of the precast column 1 may each have a node area at the same node, that is, each node area is provided with a hidden corbel 11, and each hidden corbel 11 is pre-embedded with a second column side steel connector 13. The first column side steel connector 12 may correspond to only one side node area, or better yet, the first column side steel connector 12 may correspond to the node areas of all four sides, which can facilitate construction, save materials and improve the strength of the steel structure.

[0047] The precast beam 2 can be a cubic beam structure with a rectangular cross-section and extending laterally. Its end has a node end for splicing with the precast column 1. The precast beam 2 plays the role of bearing other components of the prefabricated building and transmitting lateral force. In the technical solution adopted by this utility model, the precast beam 2 is set as a notched beam. Its node end has a concave part 201 and a convex part 202. The convex part 202 is just adapted to the concealed corbel 11 protruding outward in the node area of ​​the precast column 1. That is, when the precast column 1 and the precast beam 2 are spliced, the two form a concave-convex fit structure at the node. That is, the precast beam 2 can be lapped and supported by the concealed corbel 11 of the precast column 1, which can eliminate the need for temporary support and realize convenient connection and hide the concealed corbel, which can improve the aesthetics of the beam-column connection node.

[0048] To achieve a reliable connection between the precast column 1 and the precast beam 2, a first column-side steel connector 12 is installed in the node area of ​​the precast column 1 and at the top of the concealed corbel 11, and a second column-side steel connector 13 is pre-embedded in the concealed corbel 11. Correspondingly, a first beam-side steel connector 21 is pre-embedded in the protrusion 202 at the node end of the precast beam 2, and a second beam-side steel connector 22 is pre-embedded in the recess 201 at the node end of the precast beam 2. During splicing, the first column-side steel connector 12 and the first beam... The side steel connector 21 is welded and fixed, and the second column side steel connector 13 is welded and fixed to the second beam side steel connector 22, which can achieve convenient and reliable connection and can reliably improve construction efficiency. After welding, fine stone concrete is poured into the joint gap after splicing the node area of ​​the precast column 1 and the node end of the precast beam 2, as well as the exposed part of the steel connector, to form the filling part 3, so that the outer wall surface of the filling part 3 is flush with the outer wall surface of the precast beam 2, so as to form a good appearance and reliable connection.

[0049] Further, see attached document. Figure 2 -Appendix Figure 5 In a specific implementation, the first column-side steel connector 12 includes: two connecting base plates 121, which are arranged longitudinally opposite to each other and spaced apart, and the four corners of the connecting base plates 121 are respectively provided with clearance notches 1211 so that the connecting base plates 121 form a cross-shaped plate with four connecting ends; and four connecting side plates 122, which are respectively connected to the corresponding connecting ends of the two connecting base plates 121, the connecting side plates 122 are perpendicular to the connecting base plates 121, and the outer surface of the connecting side plates 122 is exposed in the node area; the first beam-side steel connector 21 is partially exposed outside the protrusion 202 and is welded and fixed to the outer surface of the connecting side plates 122.

[0050] Specifically, in the technical solution adopted by this utility model, the first column side steel connector 12 can be composed of two connecting base plates 121 and four connecting side plates 122. The two connecting base plates 121 are identical in shape and size and are spaced apart in the longitudinal direction. The spacing can be determined according to the actual situation and / or calculation. Rectangular clearance notches 1211 are provided at the four corners of the two connecting base plates 121, which can be used to avoid the longitudinal steel bars 14 located at the corners of the precast column 1, so that the longitudinal steel bars 14 located at the corners can pass through the first column side steel connector 12. The setting of the clearance notches 1211 can make the connecting base plates 121 form a cross-shaped plate with four connecting ends; the four connecting side plates 122 Located between two connecting base plates 121 and corresponding to and connected to the longitudinally corresponding connecting ends on the two connecting base plates 121, the connecting side plate 122 can be a rectangular plate, which is perpendicular to the connecting base plate 121 and connects the two connecting base plates 121 into one piece. The connection between the connecting side plate 122 and the connecting base plate 121 can be fixed by welding. The outer surface of the connecting side plate 122 is exposed in the node area and can be used to connect the first beam side steel connector 21. The first beam side steel connector 21 is partially exposed outside the protrusion 202. While it can be fixed by welding to the outer surface of the connecting side plate 122, a splicing gap is formed between the protrusion 202 and the node area, so as to strengthen the connection and protection through the filling part 3. The first column-side steel connector 12, formed by the cooperation of two connecting base plates 121 and four connecting side plates 122, is a steel connector with an internal cavity. By pre-embedding it in the node area, concrete can fill its cavity, which can better integrate the first column-side steel connector 12 with the precast column 1 into a whole, enhance the strength and rigidity of the connection with the precast column 1, better resist external loads, and improve the overall structure's load-bearing capacity. Moreover, by pre-embedding the installation method, the installation process of the first column-side steel connector 12 can be reduced on the construction site, which can shorten the construction period.

[0051] Among them, reference appendix Figure 5 At least one vent hole 1212 can be opened longitudinally on the connecting base plate 121. The shape of the vent hole 1212 can be, but is not limited to, circular, to ensure that the concrete inside the first column side steel connector 12 is poured densely. Several longitudinal steel bars 14 arranged in the precast column 1 should avoid the arrangement of the first column side steel connector 12 as much as possible. If it is impossible to avoid it, the longitudinal steel bars 14 of the precast column 1 can be cut off and welded to the first column side steel connector 12.

[0052] Further, see attached document. Figure 5In specific implementation, the two ends of the connecting side plate 122 extend beyond the corresponding connecting base plate 121 by a preset distance in the longitudinal direction; and multiple stiffening ribs 123 are provided on the inner surface of the part of the connecting side plate 122 that extends beyond the connecting base plate 121. The stiffening ribs 123 can be, but are not limited to, rectangular plates. The multiple stiffening ribs 123 corresponding to each connecting end are distributed at intervals along the extension direction of their edges. The spacing between any two adjacent stiffening ribs 123 can be set to be equal, and each stiffening rib 123 is perpendicular to and fixed to the connecting side plate 122 and the connecting base plate 121, and is welded and fixed to the connecting side plate 122 and the connecting base plate 121 respectively. The setting of stiffening ribs 123 can improve the local stability of each connecting end of the connecting base plate 121, thereby improving the load-bearing capacity of the structure and making the structure maintain overall stability during the stress process.

[0053] For details, please refer to the appendix. Figure 5 In the technical solution adopted by this utility model, a stiffening beam 124 can be connected to the side of the multiple stiffening ribs 123 away from the connecting side plate 122. The stiffening beam 124 is vertical and fixed to the connecting base plate 121. The stiffening beam 124 is welded and fixed to the connecting base plate 121 and the stiffening ribs 123 respectively. This can further improve the overall strength and rigidity of the first column side steel connector 12 and ensure the stability and safety of the steel connector under various working conditions.

[0054] Among them, as attached Figure 5 As shown, the two ends of the connecting side plate 122 in the longitudinal direction are flush with the end faces of the corresponding stiffening ribs 123 and stiffening beams 124, respectively. The preset distance by which the connecting side plate 122 extends beyond the corresponding connecting base plate 121 and the height of the stiffening ribs 123 and stiffening beams 124 can be determined according to the actual situation.

[0055] Further, see attached document. Figure 1 Appendix Figure 2 and appendix Figure 4 In specific implementation, the second column side steel connector 13 is partially exposed outside the concealed corbel 11, and the portion of the second column side steel connector 13 embedded inside the concealed corbel 11 is externally bound with corbel stirrups; the second column side steel connector 13 includes: a first base plate 131 and a second web plate 132 vertically arranged on the top of the first base plate 131. The first base plate 131 and the second web plate 132 are flush with the end face away from the precast column 1. The first base plate 131 and the second web plate 132 can be respectively set as rectangular steel plate structures; the bottom side of the first base plate 131 is anchored to the precast column 1 by multiple anchoring steel bars 16. The anchoring steel bars 16 are lap welded to the first base plate 131 on both sides, and the anchoring steel bars 16 can be anchored by anchoring plates or steel bar bending. The second web plate 132 can be anchored to the precast column 1 by a single steel bar, which is welded to the second web plate 132.

[0056] Further, see attached document. Figure 6-Appendix Figure 8 In specific implementation, the first beam side steel connector 21 includes: a first top plate 211 and a first web plate 212 vertically disposed at the bottom of the first top plate 211. The first top plate 211 and the first web plate 212 are flush with the end face away from the precast beam 2. The structure of the second beam side steel connector 22 is basically symmetrical to that of the first beam side steel connector 21. It includes: a second bottom plate 221 and a third web plate 222 vertically disposed at the top of the second bottom plate 221. The positions and dimensions of the second beam side steel connector 22 and the second column side steel connector 13 are respectively corresponding and adapted. The first top plate 211 of the first beam side steel connector 21 and the second bottom plate 221 of the second beam side steel connector 22 are respectively welded to the upper longitudinal reinforcement 23 and the lower longitudinal reinforcement 24 inside the precast beam 2. The welding method can be double-sided lap welding. The part of the first beam side steel connector 21 embedded inside the precast beam 2 is tied with the beam end stirrups outside the upper longitudinal reinforcement.

[0057] Specifically, the outer side of the connecting side plate 122 of the first beam side steel connector 21 and the first column side steel connector 12 is welded. The second column side steel connector 13 and the second beam side steel connector 22 correspond to and are adapted to each other, and their end faces are welded. The first top plate 211 and the connecting side plate 122, the first bottom plate 131 and the second bottom plate 221 can be fully penetrated welded. Each web plate should be provided with weld holes. The weld type between the first web plate 212 and the connecting side plate 122, and between the second web plate 132 and the third web plate 222, are all double-sided fillet welds.

[0058] Further, see attached document. Figure 1 In a specific implementation, the precast column 1 is provided with a number of longitudinal steel bars 14 inside, and the portion of the longitudinal steel bars 14 corresponding to the node area is distributed in the clearance gap 1211 of the connecting base plate 121; the longitudinal steel bars 14 are bound with a number of stirrups 15 outside, and the stirrups 15 are distributed at intervals along the longitudinal direction, and the stirrups 15 corresponding to the node area are arranged on the inner side of the connecting side plate 122.

[0059] Specifically, the precast column 1 has several longitudinal steel bars 14 arranged inside. The longitudinal steel bars 14 play a role in enhancing the load-bearing capacity, improving bending and tensile strength, controlling deformation, and improving seismic performance. Several stirrups 15 are tied to the outside of the longitudinal steel bars 14. The stirrups 15 can fix all the longitudinal steel bars 14 inside, that is, fix the position of the longitudinal steel bars 14, and can form a constraint around the longitudinal steel bars 14, effectively preventing the longitudinal steel bars 14 from buckling under stress. The stirrups 15 have good bonding force with the concrete, which can restrain the deformation of the concrete and increase the seismic and torsional bearing capacity of the precast column 1 integrated body. In the technical solution adopted by this utility model, the stirrups 15 are distributed at intervals along the longitudinal z, and some of the stirrups 15 located in the node area are arranged on the inner side of the connecting side plate 122. This arrangement can avoid interference between the connecting side plate 122 and the position of the stirrups 15, facilitate operation, and reduce stress concentration in the node area, maintaining the stability of the node area.

[0060] When connecting the precast beam 2 and the precast column 1, the precast beam 2 needs to be hoisted to the corresponding position so that the protrusion 202 of the precast beam 2 is directly above and below the hidden corbel 11 of the precast column 1. The first beam side steel connector 21 of the precast beam 2 is welded to the first column side steel connector 12, and the second beam side steel connector 22 of the precast beam 2 is welded to the second column side steel connector 13. After the welding is completed, fine stone concrete is poured into the splicing gap and the exposed part of the steel connector to form the filling part 3, and the construction is completed.

[0061] It should be noted that in the description of this specification, the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0062] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A beam-column connection structure for a precast beam and a precast column with a concealed corbel, characterized in that, include: A precast column has a node area on its side for splicing with a precast beam. A hidden corbel is provided at the bottom of the node area. A first column side steel connector is embedded in the node area of ​​the precast column and at the top of the hidden corbel. A second column side steel connector is embedded in the hidden corbel. A precast beam has a node end for splicing with the precast column. The precast beam is a notched beam with a concave and a convex portion formed at the node end. The concave portion is adapted to the hidden corbel. The convex portion has a first beam side steel connector embedded in it for welding and fixing with the first column side steel connector. The concave portion has a second beam side steel connector embedded in it for welding and fixing with the second column side steel connector. The filling part fills the joint gap formed between the node area of ​​the precast column and the node end of the precast beam after they are spliced ​​together, and the outer wall surface of the filling part is flush with the outer wall surface of the precast beam.

2. The beam-column connection joint structure of the precast beam and the concealed corbel precast column according to claim 1, characterized in that, The first column-side steel connector includes: Two connecting base plates are arranged opposite each other and spaced apart along the longitudinal direction. Each of the four corners of the connecting base plates is provided with a clearance notch. The connecting base plates form a cross-shaped plate with four connecting ends. Four connecting side plates are respectively connected to the connecting ends of the two connecting base plates. The connecting side plates are perpendicular to the connecting base plates, and the outer surfaces of the connecting side plates are exposed in the node area. The first beam side steel connector is partially exposed outside the protrusion and is welded and fixed to the outer side of the connecting side plate.

3. The beam-column connection joint structure of the precast beam and the concealed corbel precast column according to claim 2, characterized in that, The two ends of the connecting side plate extend beyond the corresponding connecting base plate by a preset distance in the longitudinal direction; The inner surface of the portion of the connecting side plate extending beyond the connecting base plate is provided with a plurality of stiffening ribs. The plurality of stiffening ribs are distributed at intervals along the edges of the corresponding connecting ends, and each stiffening rib is perpendicular to and fixed to the connecting side plate and the connecting base plate.

4. The beam-column connection joint structure of the precast beam and the concealed corbel precast column according to claim 3, characterized in that, The stiffening ribs are connected to a stiffening beam on the side opposite to the connecting side plate, and the stiffening beam is vertical and fixed to the connecting base plate.

5. The beam-column connection joint structure of the precast beam and the concealed corbel precast column according to claim 4, characterized in that, The two ends of the connecting side plate in the longitudinal direction are flush with the end faces of the corresponding stiffening ribs and stiffening beams, respectively.

6. The beam-column connection joint structure of the precast beam and the concealed corbel precast column according to claim 2, characterized in that, At least one vent hole is provided along the longitudinal direction on the connecting base plate.

7. The beam-column connection joint structure of the precast beam and the concealed corbel precast column according to claim 2, characterized in that, The first beam side steel connector includes: a first top plate and a first web plate vertically disposed at the bottom of the first top plate, wherein the first top plate and the first web plate are flush with the end face away from the precast beam.

8. The beam-column connection joint structure of the precast beam and the concealed corbel precast column according to claim 2, characterized in that, The second column side steel connector is partially exposed outside the hidden corbel. The second column side steel connector includes: a first base plate and a second web plate vertically disposed on the top of the first base plate. The first base plate and the second web plate are flush with the end face away from the precast column. The bottom side of the first base plate is anchored to the precast column by multiple anchoring steel bars.

9. The beam-column connection joint structure of the precast beam and the concealed corbel precast column according to claim 8, characterized in that, The second beam side steel connector includes a second base plate and a third web plate vertically disposed on the top of the second base plate. The positions and dimensions of the second beam side steel connector and the second column side steel connector are respectively corresponding and compatible.

10. The beam-column connection joint structure of the precast beam and the concealed corbel precast column according to claim 2, characterized in that, The precast column has a number of longitudinal steel bars arranged inside, and the portion of the longitudinal steel bars corresponding to the node area is distributed in the avoidance gap of the connecting base plate. Several stirrups are tied to the outside of the longitudinal steel bars. The stirrups are distributed at intervals along the longitudinal direction. The stirrups corresponding to the node area are arranged on the inner side of the connecting side plate.

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