Beam column joint domain steel connecting box and prefabricated frame column

Abstract

The utility model provides a beam-column joint domain steel connecting box and a prefabricated frame column, and relates to the technical field of building components. The beam-column joint area steel connecting box comprises a main body and a joint area used for being pre-buried in a prefabricated frame column, the main body comprises two cross-shaped end plates and four side plates, the two cross-shaped end plates are oppositely arranged in the longitudinal direction at intervals, the four side plates correspond to the four ends of the cross-shaped end plates respectively, and the cross-shaped end plates and the four side plates are oppositely arranged. The side plates are arranged on the cross-shaped end plates and are connected with the corresponding end parts of the two cross-shaped end plates, and the two ends of the side plates in the longitudinal direction exceed the two cross-shaped end plates by a preset distance respectively; the first connecting pieces are fixed to the outer end faces of the side plates and used for being fixed to second connecting pieces of the prefabricated frame beam through bolts. Wherein each end part of the opposite surfaces of the two cross-shaped end plates is respectively provided with a stiffening rib, and the stiffening ribs are fixedly connected with the corresponding side plates.

Description

Technical Field

[0001] This application relates to the technical field of building components, and particularly to a steel connection box for beam-column joints and a precast frame column. Background Art

[0002] An assembled concrete frame structure refers to a structure formed by assembling precast concrete components on-site through assembly connections. It mainly consists of components such as precast beams and columns. These components are produced in factories using high-precision molds and production processes, ensuring the dimensional accuracy and quality stability of the components.

[0003] As a new building technology, the assembled concrete frame structure has been widely applied. This structure not only improves construction efficiency but also ensures construction quality, achieving the goals of energy conservation and environmental protection, and has become an important development direction in the modern construction field.

[0004] With the development and wide application of the assembled concrete frame structure, a large number of studies have been conducted on the connection methods of precast beams and columns at home and abroad. Currently, wet connections are mainly used, including reinforced sleeve grouting connections, reinforced slurry anchor lapping, and reinforced welding. The wet connection method has problems such as a large amount of on-site concrete wet work, the need to set up temporary supports and formwork, a large amount of on-site work, and a long construction period, and the construction process is neither economical nor environmentally friendly.

[0005] Therefore, there is an urgent need to provide a structure that can achieve dry connection of beam-column joints. Summary of the Utility Model

[0006] The purpose of the embodiments of this application is to provide a steel connection box for beam-column joints and a precast frame column to solve the technical problems such as a large amount of on-site work and a long construction period existing in the wet connection of precast beams and columns.

[0007] To solve the above technical problems, the embodiments of this application provide the following technical solutions:

[0008] In the first aspect of this application, a steel connection box for beam-column joints is provided. The steel connection box for beam-column joints includes: a main body for being embedded in the joint area of a precast frame column. The main body includes: two cross end plates and four side plates. The two cross end plates are arranged opposite to each other and spaced apart longitudinally. The four side plates respectively correspond to the four ends of the cross end plates and connect the corresponding ends of the two cross end plates. The two ends of the side plates respectively extend beyond the two cross end plates by a preset distance longitudinally;

[0009] At least two first connectors fixed to the outer end faces of the side plates for being fixed to a second connector of a precast frame beam by bolts;

[0010] Wherein, stiffeners are respectively arranged at each end part of the surfaces of the two cross end plates facing away from each other, and the stiffeners are fixedly connected to the corresponding side plates.

[0011] In some modified embodiments of the first aspect of the present application, the stiffener includes: a vertical plate and a plurality of rib plates. The vertical plate is parallel to the corresponding end edge and perpendicular to the cross end plate. The plurality of rib plates are at least arranged on one side of the vertical plate facing the corresponding end edge, and are arranged at intervals along the extending direction of the corresponding end edge. Each rib plate is perpendicular to the vertical plate and the cross end plate;

[0012] The rib plate located on one side of the vertical plate facing the corresponding end edge is fixedly connected to the corresponding side plate by welding.

[0013] In some modified embodiments of the first aspect of the present application, the two ends of the side plate in the longitudinal direction are flush with the end faces of the corresponding stiffeners respectively.

[0014] In some modified embodiments of the first aspect of the present application, shear keys are respectively arranged at the centers of the surfaces of the two cross end plates facing each other and the surfaces facing away from each other. The cross-sectional shape of the shear key is cross-shaped, and the arrangement direction is adapted to the arrangement direction of the cross end plate.

[0015] In some modified embodiments of the first aspect of the present application, at least one anchor bar is fixedly connected to the inner side surface of each side plate, and the anchor bar is perpendicular to the corresponding side plate.

[0016] In some modified embodiments of the first aspect of the present application, the positions of the anchor bars arranged on the adjacent side plates are staggered in the longitudinal direction, and the positions of the anchor bars arranged on the opposite side plates are opposite and connected as a whole.

[0017] In some modified embodiments of the first aspect of the present application, the first connecting member includes: a first connecting plate, the first connecting plate extends along a first direction and is perpendicular to the corresponding splicing surface, and a plurality of first connecting holes are arranged on the first connecting plate.

[0018] In some modified embodiments of the first aspect of the present application, the positions of the two opposite edges of the side plate in the longitudinal direction respectively exceed the corresponding edges of the first connecting plate in this direction.

[0019] The second aspect of the present application provides a precast frame column, which includes: a precast frame column body arranged longitudinally. The precast frame column body has a joint area, and at least two sides of the joint area include joint surfaces;

[0020] The above-mentioned steel connection box for beam-column joint area, the main body of the steel connection box for beam-column joint area is embedded in the joint area, and at least two first connectors of the steel connection box for beam-column joint area are respectively exposed on the corresponding joint surface.

[0021] In some modified embodiments of the second aspect of the present application, a number of longitudinal steel bars are arranged inside the precast frame column body. The part of the number of longitudinal steel bars located in the joint area is distributed in the area between adjacent ends of the cross end plate of the main body, and a number of first stirrups are tied outside the number of longitudinal steel bars. The number of first stirrups are distributed at intervals along the longitudinal direction;

[0022] Part of the first stirrups located in the joint area are arranged inside the side plate of the main body.

[0023] Compared with the prior art, the steel connection box for beam-column joint area and the precast frame column provided by the present application have the steel connection box for beam-column joint area embedded in the joint area of the precast frame column body. Moreover, the main body of the steel connection box for beam-column joint area is in a box structure, which can be reliably and tightly connected to the precast frame column body as a whole. The first connectors of the steel connection box for beam-column joint area are exposed on the joint surface of the joint area. The precast frame column and the precast frame beam are connected and locked by bolts through the first connectors and the second connectors, realizing a dry connection method, without the need to set up a temporary support structure and a large number of wet operations such as on-site concrete pouring, which can save construction time and cost, effectively improve construction efficiency, and is beneficial to energy conservation, emission reduction and environmental protection; after the beam-column connection is realized, the connection structure at the connection position can be wrapped by pouring filling materials, so that the connection structure is not exposed, thus eliminating the need for anti-corrosion and fire-proof treatment and reducing the construction cost. Description of the Drawings

[0024] By referring to the drawings and reading the following detailed description, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the drawings, several embodiments of the present application are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0025] Figure 1 Schematically shows the structural schematic diagram of the steel connection box for beam-column joint area provided by the embodiment of the present invention;

[0026] Figure 2 Schematically shows the structural schematic diagram of the precast frame column provided by the embodiment of the present invention;

[0027] Figure 3 Schematically shows Figure 2 the sectional structural schematic diagram of the A-A section in

[0028] Figure 4 Schematically showsFigure 2 Schematic diagram of the sectional structure of the B-B section;

[0029] Figure 5 Schematically shows the distribution diagram of the steel connection box in the beam-column joint area and the longitudinal reinforcement;

[0030] Figure 6 Schematically shows the structural schematic diagram of the connection between the precast frame column and the precast frame column provided by the embodiment of the present invention;

[0031] Figure 7 Schematically shows Figure 6 Schematic diagram of the sectional structure of the C-C section;

[0032] Figure 8 Schematically shows the structural schematic diagram of the second connecting member provided by the embodiment of the present invention;

[0033] Figure 9 Schematically shows the partial structural schematic diagram of the precast frame beam provided by the embodiment of the present invention;

[0034] Figure 10 Schematically shows Figure 9 Schematic diagram of the sectional structure of the D-D section;

[0035] Explanation of the reference numerals in the drawings:

[0036] 1. Precast frame column body; 11. First longitudinal reinforcement; 12. Second longitudinal reinforcement; 13. First stirrup; 14. Second stirrup; 15. Third stirrup; 16. Structural reinforcement;

[0037] 2. Steel connection box in the beam-column joint area; 21. Main body; 211. Cross end plate; 212. Side plate; 213. Shear key; 214. Stiffening rib; 2141. Vertical plate; 2142. Rib plate; 215. Anchor bar; 22. First connecting member; 221. First connection hole;

[0038] 3. Precast frame beam; 31. Longitudinal reinforcement in the beam; 32. Fifth stirrup; 33. Stud;

[0039] 4. Second connecting member; 41. Second connecting plate; 411. Second connection hole; 412. Through hole; 42. Third connecting plate;

[0040] 5. Fourth stirrup;

[0041] 61. Bolt; 62. Nut;

[0042] x. First direction; y. Second direction; z. Longitudinal direction. Detailed implementation manners

[0043] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0044] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which this application belongs.

[0045] Embodiment 1

[0046] Referring to the attached Figure 1 , Embodiment 1 of the present utility model provides a steel connection box for a beam-column joint area. The steel connection box for the beam-column joint area includes: a main body 21 for being embedded in the joint area of a precast frame column. The main body 21 includes: two cross end plates 211 and four side plates 212. The two cross end plates 211 are arranged opposite to each other and spaced apart longitudinally. The four side plates 212 respectively correspond to the four ends of the cross end plates 211 and connect the corresponding ends of the two cross end plates 211. The two ends of the side plates 212 respectively extend beyond the two cross end plates 211 by a preset distance longitudinally; at least two first connectors 22 fixed to the outer end surfaces of the side plates 212 for being fixedly connected to a second connector 4 of a precast frame beam 3 by bolts; wherein, stiffening ribs 214 are respectively arranged at each end of the surfaces of the two cross end plates 211 facing away from each other, and the stiffening ribs 214 are fixedly connected to the corresponding side plates 212.

[0047] Specifically, the steel connection box 2 for the beam-column joint area provided in this embodiment is used to be embedded in the joint area of a precast frame column and realize bolt 61 connection with the joint end of a precast frame beam 3, so as to realize dry connection of beam-column connection, without the need for temporary supports and formwork, and without a large amount of wet work, which can save construction time and cost and can be more economical and environmentally friendly.

[0048] The structure of the steel connection box 2 in the beam-column joint area includes: a main body 21 and at least two first connecting members 22. The main body 21 is embedded in the joint area of the precast frame column 1. The main body 21 is set to have a structure similar to a box, which includes: two cross end plates 211 and four side plates 212. The shape of the cross end plate 211 is approximately a cross-shaped flat plate structure formed by the perpendicular intersection of two long plate members. It has an intersection area and four ends. The four side plates 212 correspond to each end of the cross end plate 211 and are connected between the corresponding ends of the two cross end plates 211. Specifically, fixation can be achieved through welding. With such a setting, the main body 21 is set to a symmetrical structure, and the outer side surface of its side plate 212 is flush with the joint surface. The first connecting member 22 is fixed to the outer side surface of the side plate 212, which can make the structure of the main body 21 of the steel connection box 2 in the beam-column joint area have high stability. The cooperation of the two cross end plates 211 and the four side plates 212 forms a cavity inside the main body 21. Thus, by being embedded in the joint area, concrete can be filled inside, better forming an integral whole with the precast frame column 1, enhancing the strength and stiffness of the connection with the precast frame column 1, being able to better resist external loads, and improving the bearing capacity of the overall structure. Moreover, through the embedded connection method, the procedures for installing the steel connection box 2 in the beam-column joint area can be reduced at the construction site, shortening the construction period. The number of the first connecting members 22 is equal to and corresponds one by one to the number of joints in the joint area. The first connecting member 22 is fixed to the side part of the main body 21 and is exposed on the corresponding joint surface. The first connecting member 22 and the main body 21 can be processed into one body through welding. The first connecting member 22 and the second connecting member 4 can be connected and locked through a threaded locking member 6 by a bolt 61, thereby realizing the dry connection of the beam-column connection.

[0049] Among them, arranging stiffeners 214 at each end of the cross end plate 211 can significantly improve the local stability of the end area of the cross end plate 211, improve the bearing capacity of the structure, and enable the structure to maintain overall stability during the stress process. Fixing the stiffener 214 to the corresponding side plate 212, specifically through welding, with such a setting, can further improve the overall strength and stiffness of the steel connection box 2 in the beam-column joint area, ensuring the stability and safety of the structure under various working conditions.

[0050] As listed above, an embodiment of the present utility model provides a steel connection box for beam-column joint area. The steel connection box for beam-column joint area 2 is pre-embedded in the joint area of the precast frame column. The main body 21 of the steel connection box for beam-column joint area is in a box structure and can be reliably and tightly connected to the precast frame column as a whole. The first connecting piece 22 of the steel connection box for beam-column joint area 2 is exposed on the joint surface of the joint area. The precast frame column and the precast frame beam 3 are connected and locked through the first connecting piece 22 and the second connecting piece 4 by bolts 61, realizing a dry connection method. There is no need to set up a temporary support structure and a large number of wet operations such as on-site concrete pouring, which can save construction time and cost, effectively improve construction efficiency, and is beneficial to energy conservation, emission reduction and environmental protection.

[0051] Further, referring to the appendix Figure 1 , in a specific implementation, the structure of the stiffening rib 214 specifically includes: a vertical plate 2141 and a plurality of rib plates 2142. The vertical plate 2141 can be a long strip-shaped flat plate structure, and its extending direction is the same as the extending direction of the corresponding end edge, and the vertical plate 2141 is perpendicular to the cross end plate 211. The plurality of rib plates 2142 are at least arranged on one side of the vertical plate 2141 facing the corresponding end edge. Preferably, the plurality of rib plates 2142 can be respectively arranged on both sides of the vertical plate 2141 and are arranged at intervals along the extending direction of the corresponding end edge. Each rib plate 2142 is respectively perpendicular to the vertical plate 2141 and the cross end plate 211. The shape of each rib plate 2142 can be rectangular, right-angled triangle, right-angled trapezoid, etc.; the plurality of rib plates 2142 arranged on one side of the vertical plate 2141 facing the corresponding end edge are respectively fixedly connected to the corresponding side plate 212, specifically by welding. Such a setting can further improve the overall strength and stiffness of the steel connection box for beam-column joint area 2 and ensure the stability and safety of the structure under various working conditions.

[0052] Among them, the preset distance that the side plates 212 extend beyond the two cross end plates 211 at both ends in the longitudinal direction can be set according to the size of the stiffening rib in the longitudinal direction, so that the two ends of the side plates 212 in the longitudinal direction are flush with the end faces of the corresponding stiffening ribs.

[0053] Further, referring to the appendix Figure 1, in order to improve the shear resistance of the steel connection box 2 in the beam-column joint area, in specific implementation, cruciform shear keys 213 are respectively arranged at the centers of the opposite surfaces and the back surfaces of the two cruciform end plates 211. The arrangement direction of the cruciform shear keys 213 in the shape of a cross is adapted to the arrangement direction of the cruciform end plates 211, that is, the respective ends correspond to each other. By arranging the shear keys 213, on the one hand, it can make the force transmission path between the steel connection box 2 in the beam-column joint area and the precast frame column 1 more direct and clear. When subjected to external forces, it can reduce the offset and loss during the force transmission process. On the other hand, the shear keys 213 can also increase the contact area between the steel connection box 2 in the beam-column joint area and the precast frame column 1, thereby improving the bearing capacity of the joint area when subjected to shear forces, being able to effectively resist the shear forces generated by horizontal loads such as wind loads and seismic loads, preventing shear failure in the joint area. In addition, it can also disperse stress, reduce stress concentration, and improve the stability and safety of the overall structure.

[0054] Further, referring to the attached Figure 1 , in specific implementation, anchor bars 215 are respectively fixedly connected to the inner sides of each side plate 212. The number of anchor bars 215 arranged on each side plate 212 is not limited to one. The anchor bars 215 are perpendicular to the corresponding side plates 212, can form a tight combination with the concrete, prevent the steel connection box 2 in the beam-column joint area from loosening during the force-bearing process, and the connection between the anchor bars 215 and the side plates 212 not only enhances the local connection strength of the joint area but also is beneficial to improving the bearing capacity and seismic performance of the overall structure when bearing loads.

[0055] Among them, referring to the attached Figure 1 , the positions of the anchor bars 215 connected to the adjacent side plates 212 are staggered in the longitudinal direction z, and the positions of the anchor bars 215 connected to the opposite side plates 212 can be opposite in the longitudinal direction z and can be connected as a whole, as shown in the attached Figure 7 shown, thereby further enhancing the structural strength of the steel connection box 2 in the beam-column joint area.

[0056] Embodiment 2

[0057] Referring to the attached Figure 1 - attached Figure 4 , Embodiment 2 of the present utility model proposes a precast frame column, which includes: a precast frame column body arranged longitudinally, the precast frame column body having a joint area, at least two sides of the joint area including joint surfaces; and the above-mentioned steel connection box in the beam-column joint area, the main body 21 of the steel connection box in the beam-column joint area is embedded in the joint area, and at least two first connectors of the steel connection box in the beam-column joint area are respectively exposed on the corresponding joint surfaces.

[0058] Specifically, the precast frame column provided in this embodiment includes a precast frame column body 1 and the above-mentioned steel connection box for beam-column joint area. The precast frame column body 1 can be a cubic column structure with a rectangular cross-section extending along the longitudinal direction z. Its bottom end is fixed at a preset position on the construction site, and it can be fixed to the foundation or other precast frame column bodies 1. The precast frame column body 1, as a longitudinal z load-bearing member, can effectively transfer the weight of the building to the foundation.

[0059] The precast frame column body 1 includes a joint area, and the joint area includes a joint surface for connecting with the precast frame beam 3. Each joint area of the precast frame column body 1 has at least two joint surfaces, and each joint surface corresponds to a precast frame beam 3. Specifically, the following situations are included: only two adjacent side surfaces of the joint area are joint surfaces, that is, this joint area needs to be connected and matched with two precast frame beams 3; or three of the side surfaces of the joint area are joint surfaces, that is, this joint area needs to be connected and matched with three precast frame beams 3; or each side surface of the joint area is a joint surface, that is, in this joint area, it needs to be spliced and connected with four precast frame beams 3; and the number of joint areas included in each precast column body in the longitudinal direction z is not specifically limited here.

[0060] By embedding the steel connection box 2 for beam-column joint area in the joint area of the precast frame column 1, the first connector 22 and the second connector 4 of the precast frame beam 3 are connected, locked and fixed by bolts 61, so as to realize the dry connection of beam-column connection, without temporary support and formwork, and without a large amount of wet work, which can save construction time and cost, and can be more economical and environmentally friendly.

[0061] Further, referring to the attached Figure 2 - attached Figure 5 In specific implementation, a number of longitudinal steel bars are arranged inside the precast frame column body 1. The part of the number of longitudinal steel bars located in the joint area is distributed in the area between the adjacent ends of the cross end plate 211, and a number of first stirrups 13 are bound outside the number of longitudinal steel bars. The number of first stirrups 13 are distributed at intervals along the longitudinal direction z; the number of first stirrups 13 located in the joint area are arranged inside the side plate 212.

[0062] Specifically, a number of longitudinal steel bars are arranged inside the precast frame column body 1. The longitudinal steel bars play various roles such as enhancing the bearing capacity, improving the flexural and tensile strengths, controlling deformation, and improving the seismic performance. A number of first stirrups 13 are tied outside the longitudinal steel bars. The first stirrups 13 can fix all the longitudinal steel bars inside, that is, fix the positions of the longitudinal steel bars, and can form a restraint around the longitudinal steel bars, effectively preventing the longitudinal steel bars from buckling under stress. There is a good bonding force between the first stirrups 13 and the concrete, which can restrain the deformation of the concrete and increase the seismic and torsional bearing capacities of the precast column body assembly. In the technical solution adopted by the present utility model, a number of first stirrups 13 are distributed at intervals along the longitudinal direction z, and some of the first stirrups 13 located in the joint area are arranged on the inner side of the side plate 212. Such a setting can avoid the interference between the side plate 212 and the first stirrups 13, facilitate the operation, and can reduce the stress concentration phenomenon in the joint area and maintain the stability of the joint area.

[0063] Specifically, referring to the attached Figure 2 - attached Figure 5 , based on the arrangement positions of the longitudinal steel bars, the longitudinal steel bars in the z direction can be divided into three categories, namely the first longitudinal steel bars 11 and the second longitudinal steel bars 12. The above-mentioned first stirrups 13 are tied outside all the longitudinal steel bars; the number of the first longitudinal steel bars 11 is four, and they are respectively arranged at the four corners of the precast frame column body 1. The positions of the first longitudinal steel bars 11 are at the boundary positions of the precast frame column body 1 and may bear greater stress and deformation. The diameter of the first longitudinal steel bars 11 can be larger than that of the second longitudinal steel bars 12; two second longitudinal steel bars 12 are arranged between two adjacent first longitudinal steel bars 11. In order to enhance the overall mechanical properties of the precast frame column body 1, in the technical solution adopted by the present utility model, a number of second stirrups 14 are tied outside the four first longitudinal steel bars 11 opposite to each other in the first direction x, and a number of third stirrups 15 are tied outside the four second longitudinal steel bars 12 opposite to each other in the second direction y. The settings of the second stirrups 14 and the third stirrups 15 can enhance the overall mechanical properties of the precast frame column body 1, so that when the precast frame column body 1 bears an external load, it can more effectively transfer and disperse the stress, provide the stability and safety of the structure, and can also make the stress distribution more uniform, improving the bearing capacity and reliability of the precast composite column; a number of second stirrups 14 and a number of third stirrups 15 are respectively distributed at intervals along the longitudinal direction z, and the first stirrups 13, the second stirrups 14, and the third stirrups 15 can be arranged alternately. The first direction x and the second direction y are perpendicular to each other and are respectively perpendicular to the longitudinal direction z.

[0064] Among them, referring to the attached Figure 2, the spacing between adjacent first stirrups 13 located in the joint area can be smaller than the spacing between adjacent first stirrups 13 in the non-joint area; in addition, the precast frame column body 1 also has construction steel bars 16, and the construction steel bars 16 are disconnected at the position where the steel connection box 2 of the beam-column joint area is located inside the precast frame column body 1 to achieve avoidance.

[0065] Refer to Appendix Figure 1 , Appendix Figure 5 - Appendix Figure 10 , the structures of the first connecting member 22 and the second connecting member 4 will be specifically described below. In the technical solution adopted by the present utility model, the first connecting plate can be a rectangular flat plate structure, which extends along the longitudinal direction z and is perpendicular to the corresponding joint surface. A plurality of first connecting holes 221 are provided on the first connecting plate. The number of the first connecting holes 221 can be four and is arranged in an array distribution form; the second connecting member 4 includes: a second connecting plate 41 and two third connecting plates 42, which can be respectively set as rectangular flat plate structures and perpendicular to the joint surface. The second connecting plate 41 is parallel to the first connecting plate, and the third connecting plate 42 is perpendicular to the second connecting plate 41, that is, the second connecting member 4 can form an approximate "I"-shaped structure. Second connecting holes 411 corresponding to the number and position of the first connecting holes 221 are provided on the second connecting plate 41 for connecting threaded locking members 6 to connect the first connecting member 22 and the second connecting member 4 with bolts 61 and nuts 62 to lock.

[0066] Among them, refer to Appendix Figure 6 - Appendix Figure 10 , the fixing method of the second connecting member 4 to the precast frame beam 3 can be: the second connecting member 4 is partially embedded in the precast frame beam 3, and both sides of the second connecting plate 41 are respectively anchored by a plurality of stud bolts 33; in addition, at least part of the positions of several longitudinal beam bars 31 inside the precast frame beam 3 correspond to the third connecting plates 42, and the opposite surfaces of the two third connecting plates 42 are respectively welded and fixed to the corresponding longitudinal beam bars 31. Each longitudinal beam bar 31 can adopt double-sided welding to ensure the reliability of welding; a fifth stirrup 32 is tied outside several longitudinal beam bars 31; through holes 412 can also be opened on the second connecting plate 41 to enable the embedded part of the second connecting member 4 to be fully and tightly connected with the concrete.

[0067] Furthermore, refer to Appendix Figure 1 and Appendix Figure 6, in order to further enhance the reliability and strength of the connection between the second connecting member 4 of the precast frame beam 3 and the steel connection box 2 of the beam-column joint area of the precast frame column body 1, in specific implementation, the dimension of the side plate 212 in the longitudinal direction z is set to be slightly larger than the dimension of the first connecting plate in this direction, so that both ends of the side plate 212 in the longitudinal direction z respectively exceed the corresponding edges of the first connecting plate by a preset distance. Thus, after the second connecting member 4 and the first connecting member 22 are plugged in place, the edge of the third connecting plate 42 can be attached to the side plate 212 and can be fixed by welding.

[0068] Further, referring to the attached Figure 6 , in order to further enhance the reliability and strength of the connection between the first connecting member 22 and the second connecting member 4, in specific implementation, several fourth stirrups 5 can be tied around the outer periphery after the first connecting member 22 and the second connecting member 4 are connected. The several fourth stirrups 5 are spaced apart along the extending direction of the precast frame beam 3. Through the fourth stirrups 5, the first connecting member 22 and the second connecting member 4 can be further positioned.

[0069] It should be noted that in the description of this specification, the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it cannot be understood as a limitation to the present invention; terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0071] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A steel connection box for a beam-column node, characterized in that: include: A main body, used for pre-embedded in the node area of ​​the prefabricated frame column, the main body comprising: two cross end plates and four side plates, the two cross end plates are arranged opposite to each other and spaced apart in the longitudinal direction, the four side plates respectively correspond to the four ends of the cross end plates and connect the corresponding ends of the two cross end plates, and the two ends of the side plates in the longitudinal direction respectively exceed the two cross end plates by a preset distance; At least two first connecting members, the first connecting members are fixed to the outer end surfaces of the side plates and are used to be fixed to the second connecting members of the prefabricated frame beams by bolts; Wherein, each end of the surfaces facing away from each other of the two cross end plates is respectively provided with a stiffening rib, and the stiffening rib is fixedly connected to the corresponding side plate.

2. The beam-column node steel connection box according to claim 1, characterized in that: The stiffening rib comprises: a vertical plate and a plurality of rib plates, wherein the vertical plate is parallel to the corresponding end edge and perpendicular to the cross end plate, the plurality of rib plates are at least arranged on one side of the vertical plate facing the corresponding end edge, and are arranged at intervals along the extension direction of the corresponding end edge, and each of the rib plates is perpendicular to the vertical plate and the cross end plate respectively; The rib plate located on the side of the vertical plate facing the corresponding end edge is welded and fixed to the corresponding side plate.

3. The beam-column node steel connection box according to claim 1 or 2, characterized in that: Both ends of the side plate in the longitudinal direction are flush with the end surfaces of the corresponding stiffening ribs.

4. The beam-column node steel connection box according to claim 1, characterized in that: Shear keys are respectively arranged at the centers of the opposing surfaces and the opposite surfaces of the two cross end plates. The cross-sectional shape of the shear keys is a cross, and the arrangement direction is adapted to the arrangement direction of the cross end plates.

5. The beam-column node steel connection box according to claim 1, characterized in that: The inner side surface of each side plate is respectively fixedly connected with at least one anchor bar, and the anchor bar is perpendicular to the corresponding side plate.

6. The beam-column node steel connection box according to claim 5, characterized in that: The anchor bars arranged on adjacent side panels are staggered in longitudinal direction, and the anchor bars arranged on opposite side panels are arranged in opposite positions and connected as a whole.

7. The beam-column node steel connection box according to claim 1, characterized in that: The first connecting member includes: a first connecting plate, the first connecting plate extends along a first direction and is perpendicular to the corresponding splicing surface, and a plurality of first connecting holes are arranged on the first connecting plate.

8. The beam-column node steel connection box according to claim 7, characterized in that: The positions of two opposite edges of the side plate in the longitudinal direction respectively exceed the corresponding edges of the first connecting plate in this direction.

9. A prefabricated frame column, characterized in that: include: A prefabricated frame column body is arranged in the longitudinal direction, wherein the prefabricated frame column body has a node area, and at least two sides of the node area include node surfaces; According to any one of claims 1 to 8, the main body of the beam-column node domain steel connection box is pre-buried in the node area, and at least two first connecting parts of the beam-column node domain steel connection box are respectively exposed on the corresponding node surfaces.

10. The prefabricated frame column according to claim 9, characterized in that: A plurality of longitudinal steel bars are arranged inside the prefabricated frame column body, and parts of the plurality of longitudinal steel bars located in the node area are distributed in the area between adjacent ends of the cross end plate of the body, and a plurality of first stirrups are tied outside the plurality of longitudinal steel bars, and the plurality of first stirrups are distributed at intervals along the longitudinal direction; Part of the first stirrups located in the node area is arranged on the inner side of the side plate of the main body.

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