Box type connection assembly type concrete frame structure and construction method thereof

Abstract

The box type connection assembly type concrete frame structure comprises a prefabricated column and a prefabricated beam, the prefabricated column comprises a prefabricated column main body, a plurality of column longitudinal bars are arranged in the prefabricated column main body, first bolts are embedded in the top of the prefabricated column main body, a plurality of prefabricated column box type connecting pieces are arranged at the second end of the prefabricated column main body, and the column longitudinal bars are connected with the prefabricated column box type connecting pieces; the prefabricated column box type connecting piece can be in bolted connection with another prefabricated column; the middle part of the prefabricated column comprises a beam-column connecting position, a beam top rib is pre-embedded on a prefabricated column main body at the upper part of the beam-column connecting position, and a pre-embedded steel plate is arranged at the lower part of the beam-column connecting position and is provided with a bolt connecting hole; the precast beam comprises a precast beam main body, one end of the precast beam main body is provided with a precast beam box type connecting piece, and the precast beam box type connecting piece can be in bolted connection with the precast column; the top of the precast beam body is provided with precast beam stirrups. The method has the advantages of remarkably reduced wet operation, high assembly rate, short construction period, energy conservation, environmental protection, low carbon, emission reduction, low comprehensive cost, high cost performance and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of assembled concrete buildings, and in particular relates to a box-type connected assembled concrete frame structure and a construction method thereof. Background Art

[0002] The frame structure is a structural form widely used in construction and civil engineering, with good bearing capacity and adaptability. However, the frame structure also has some defects and shortcomings, mainly including the following aspects:

[0003] (1) The part where beams and columns are connected in a frame structure is called the core area of ​​the node. It is a key part that affects the overall performance. It is under the combined stress of bending moment, shear force and axial force in the structure. If the node design is unreasonable or the construction quality is not up to standard, it may lead to stress concentration at the node, which in turn causes local failure or overall collapse. Under the action of an earthquake, how to realize the design concept of "strong columns and weak beams, strong nodes and weak components", that is, the plastic hinge at the beam end appears before the column end, to ensure that the core area of ​​the node is intact, is one of the main problems that need to be solved in the design of frame structures, and is also the key direction of the development of prefabricated frame structures.

[0004] (2) The main dry node connection structures currently proposed include bolt connection, welding connection, grouting sleeve connection, prestressed connection and bracket connection. Among them, the traditional steel bar grouting sleeve connection is the steel bar connection method recommended in the specification. Its main problems include difficult installation and positioning, complex construction process, high cost and difficult to detect construction. The core area of ​​the beam-column node still needs to be poured with concrete on site, and the quality is difficult to guarantee.

[0005] (3) If the core area of ​​the node or the column end is damaged before the beam end, the ductility of the structure will be significantly reduced, resulting in rapid damage to the structural components under earthquake action, or even collapse. Therefore, the bearing capacity of the node must achieve a balance. When a strong earthquake occurs, the beam end needs to be damaged in time to produce a plastic hinge, but it must also be ensured that it is not affected by small earthquakes and wind shocks, so that the node damage can be controlled. Although measures such as increasing the strength grade of the concrete in the core area of ​​the node, increasing the configuration of stirrups in the core area of ​​the node, and strengthening the constraints on the core area of ​​the node can effectively improve the bearing capacity, these measures all have problems such as being difficult to repair and uneconomical.

[0006] Therefore, a new type of prefabricated concrete frame structure system and construction method is proposed, which conforms to the design principle of “strong columns and weak beams, strong nodes and weak components”, can reduce the concrete damage at the beam ends in the core area of ​​the nodes, and can solve the problems of complex traditional steel sleeve grouting connection technology and difficult construction detection. This is of great significance to the development of prefabricated buildings. Summary of the invention

[0007] In order to solve the above problems existing in the prior art, the present invention provides a box-type connection assembled concrete frame structure and a construction method thereof, in order to meet the needs of building design and construction, and to reduce the concrete damage at the beam end of the node core area under the action of earthquake load. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0008] The present invention provides a box-type connection assembled concrete frame structure, comprising prefabricated columns and prefabricated beams, wherein:

[0009] The prefabricated column comprises a prefabricated column body, the interior of the prefabricated column body comprises a plurality of column longitudinal bars arranged longitudinally, a plurality of first bolts are pre-embedded at the top of the first end of the prefabricated column body, a plurality of prefabricated column cassette connectors are arranged on the side wall of the second end of the prefabricated column body, one end of the column longitudinal bar is connected to the prefabricated column cassette connector at a corresponding position, and the prefabricated column cassette connector can be bolted to the first bolt on another prefabricated column through a nut;

[0010] The middle part of the prefabricated column also includes a beam-column connection position, a beam top reinforcement is pre-embedded on the prefabricated column body above the beam-column connection position, and a pre-embedded steel plate is provided at the lower part of the beam-column connection position, and a bolt connection hole is opened on the pre-embedded steel plate, and the bolt connection hole extends inward from the pre-embedded steel plate to penetrate the prefabricated column body;

[0011] The prefabricated beam comprises a prefabricated beam body, one end of the prefabricated beam body to be assembled with the prefabricated column is provided with a prefabricated beam box-type connector, and the prefabricated beam box-type connector can be bolted to the prefabricated column through the bolt connection hole; the top of the prefabricated beam body is provided with a plurality of evenly arranged prefabricated beam stirrups, and the lower ends of the prefabricated beam stirrups are pre-embedded in the interior of the prefabricated beam body for cooperating with the beam top reinforcement during assembly.

[0012] In one embodiment of the present invention, first shear key grooves are respectively provided on the first end surface and the second end surface of the prefabricated column body. During assembly, the first shear key groove of the current prefabricated column can be positioned opposite to the first shear key groove of another prefabricated column.

[0013] In one embodiment of the present invention, a second shear key groove is provided on one end surface of the prefabricated beam body to be assembled with the prefabricated column, and a third shear key groove cooperating with the second shear key groove is provided at the beam-column connection position of the side wall of the prefabricated column body.

[0014] In one embodiment of the present invention, the interior of the prefabricated column body includes four column longitudinal reinforcements arranged longitudinally, and four prefabricated column box-type connectors are arranged on the second end side wall of the prefabricated column body, and one end of each column longitudinal reinforcement is welded to the prefabricated column box-type connector at the corresponding position.

[0015] In one embodiment of the present invention, four first bolts are pre-embedded at the top of the first end of the prefabricated column body, and one end of the first bolt located inside the prefabricated column body is connected or overlapped with the column longitudinal reinforcement at the corresponding position;

[0016] A bolt hole is provided on one side of the prefabricated column box-type connector close to the end of the prefabricated column body; the first bolt of the current prefabricated column can pass through the bolt hole to be bolted to another prefabricated column.

[0017] In one embodiment of the present invention, a plurality of precast beam lower longitudinal reinforcements parallel to each other are further provided inside the precast beam body, and one end of the precast beam lower longitudinal reinforcement is fixedly connected to the precast beam box-type connector.

[0018] In one embodiment of the present invention, the prefabricated column box-type connector and the prefabricated beam box-type connector are both cubic structures and made of stainless steel; at least one side wall opening of the prefabricated column box-type connector and the prefabricated beam box-type connector is used for installing nuts during assembly and grouting when assembly is completed.

[0019] In one embodiment of the present invention, a PVC pipe is further provided on the upper surface of the precast beam body, and the PVC pipe passes through the precast beam body and communicates with the precast beam box-type connector, so as to be used for grouting the precast beam box-type connector.

[0020] In one embodiment of the present invention, an embedded pad is further provided on the other side of the prefabricated column body opposite to the embedded steel plate, and the bolt connection hole extends inward from the embedded steel plate to penetrate the prefabricated column body and the embedded pad.

[0021] Another aspect of the present invention provides a construction method of a box-type connection assembled concrete frame structure, comprising:

[0022] The prefabricated column cassette connector on the prefabricated column is bolted to the second bolt extending from the prefabricated foundation to complete the connection between the prefabricated column and the prefabricated foundation;

[0023] The prefabricated column cassette connector of the upper prefabricated column is bolted to the first bolt extending from the upper surface of the lower prefabricated column to complete the connection between different prefabricated columns;

[0024] The longitudinal reinforcement of the precast column is overlapped with the top reinforcement of the precast beam, and the precast beam box connector of the precast beam is bolted to the precast column to complete the connection between the precast column and the precast beam;

[0025] After the overall frame is installed, grouting material is used to grout the precast column box connectors, precast beam box connectors, and keyways on the precast columns and precast beams;

[0026] Pour the post-cast layer on the upper surface of the precast beam.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. In the box-type connection prefabricated concrete frame structure provided by the present invention, structural components such as prefabricated columns and prefabricated beams are all produced in a factory-based manner, which improves the quality of prefabricated components while also achieving the unification of standardization and diversification of key components. The frame structure involves an industrialized construction method of standardized design, factory-based production, and assembly construction. Compared with the prior art, it has the advantages of significantly reduced wet work, high assembly rate, short construction period, energy conservation, environmental protection, low carbon emission reduction, low comprehensive cost, and high cost performance. The node structure in the box-type connection prefabricated concrete frame structure is relatively simple, the components do not have reinforcement, and a relatively simple and convenient component connection method is adopted. During installation and after the earthquake, hidden dangers can be quickly detected, and the advantages of the prefabricated structure in cost and efficiency are fully utilized. The problems of the complex node structure of the prior art, the common reinforcement of the components leading to low production and installation efficiency, and the difficulty in detecting hidden dangers are solved. In addition, the frame structure can be arranged as needed with a single span, multiple spans, and a single-layer and multi-layer structure, meeting the current demand for flexible structural layout.

[0029] 2. The precast columns in the core area of ​​the node of the present invention are continuous without post-poured concrete. The precast columns are connected in the column center, and the column-to-column connection is moved to the column center position where the force is the smallest, thereby improving the bearing capacity. The box-type connector at the lower end of the precast beam can make the plastic hinge appear at the beam end position, thereby reducing the risks of local damage, excessive deformation, and reduced seismic performance caused by the formation of plastic hinges in the core area of ​​the beam-column node under the action of an earthquake, thereby improving the stiffness and strength of the structure, which has a positive significance for the seismic resistance of the structure and the service life of the building.

[0030] 3. Prefabricated column box connectors and prefabricated beam box connectors can be completely hidden under the finished surface of the building, and will not affect the subsequent construction and aesthetics of the structure.

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a three-dimensional schematic diagram of a prefabricated column provided by an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of connecting two prefabricated columns provided by an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the connection between a prefabricated column and a prefabricated foundation provided by an embodiment of the present invention;

[0035] Figure 4is a three-dimensional schematic diagram of a prefabricated beam provided by an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the connection between a prefabricated column and a prefabricated beam provided by an embodiment of the present invention;

[0037] Figure 6 It is a structural schematic diagram of an overall framework provided by an embodiment of the present invention.

[0038] Description of reference numerals:

[0039] 1-precast column; 11-precast column body; 12-column longitudinal reinforcement; 13-first bolt; 14-precast column cassette connector; 15-beam top reinforcement; 16-embedded steel plate; 17-bolt connection hole; 18-first shear keyway; 19-third shear keyway; 110-embedded pad; 111-corbel mounting hole; 112-first hanger; 2-precast beam; 21-precast beam body; 22-precast beam cassette connector; 23-precast beam stirrups; 24-second shear keyway; 25-precast beam lower longitudinal reinforcement; 26-PVC pipe; 27-second hanger; 3-precast foundation; 31-second bolt; 4-removable corbel; 5-grouting material; 6-nut; 7-post-casting layer; 8-long-rod bolt; 9-precast composite slab; 10-precast steel staircase. DETAILED DESCRIPTION

[0040] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, a box-type connection assembled concrete frame structure and a construction method thereof proposed in accordance with the present invention are described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0041] The above and other technical contents, features and effects of the present invention are clearly presented in the following detailed description of the specific implementation modes in conjunction with the accompanying drawings. Through the description of the specific implementation modes, the technical means and effects adopted by the present invention to achieve the predetermined purpose can be more deeply and specifically understood. However, the attached drawings are only for reference and explanation purposes and are not used to limit the technical solutions of the present invention.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed. In the absence of more restrictions, the elements defined by the statement "including one..." do not exclude the existence of other identical elements in the article or device including the elements.

[0043] Embodiment 1

[0044] This embodiment provides a box-type connection assembled concrete frame structure. Please refer to Figures 1 to 5 The box-type connection assembled concrete frame structure includes a prefabricated column 1 and a prefabricated beam 2 that can cooperate with each other. The prefabricated column 1 includes a prefabricated column body 11, which is a cast cubic cement column. The interior of the prefabricated column body 11 includes a plurality of column longitudinal reinforcements 12 arranged longitudinally, and a plurality of first bolts 13 are embedded in the top of the first end of the prefabricated column body 11. The upper end of the first bolt 13 extends from the top of the first end of the prefabricated column body 11, and the lower end is connected or overlapped with the column longitudinal reinforcement 12 at the corresponding position.

[0045] A plurality of prefabricated column cassette connectors 14 are arranged on the second end side wall of the prefabricated column body 11, and one end of the column longitudinal reinforcement 12 is connected to the prefabricated column cassette connector 14 at the corresponding position. The prefabricated column cassette connector 14 can be bolted to the first bolt 13 on another prefabricated column through a nut 6.

[0046] Specifically, a bolt hole (not shown in the drawings) is provided on one side of the prefabricated column cassette connector 14 near the end of the prefabricated column body 11. During assembly, the first bolt 13 of the lower prefabricated column 1 can pass through the bolt hole and be bolted to the upper prefabricated column 1 in the prefabricated column cassette connector 14. Figure 2 As shown, that is, the upper end of the first bolt 13 on the lower prefabricated column 1 passes through the bolt hole on the prefabricated column cassette connector 14 at the corresponding position and enters the interior of the prefabricated column cassette connector 14, and the first bolt 13 is tightened inside the prefabricated column cassette connector 14 by a nut 6 that meets the requirements, thereby completing the connection between the upper and lower prefabricated columns 1.

[0047] In particular, during the actual assembly process, the prefabricated column 1 may also be connected to the prefabricated foundation 3, such as Figure 3 As shown, a plurality of second bolts 31 are also embedded in the prefabricated foundation 3, and the upper surfaces of the second bolts 31 extend out of the top of the prefabricated foundation 3. During assembly, the tops of the second bolts 31 extend into the interior of the prefabricated column cassette connector 14 of the prefabricated column 1 above, and are tightened with nuts 6 that meet the requirements, thereby completing the connection between the prefabricated column 1 and the prefabricated foundation 3.

[0048] In this embodiment, if Figure 2As shown, the interior of the prefabricated column body 11 includes four column longitudinal reinforcements 12 arranged longitudinally, and four prefabricated column cassette connectors 14 are arranged on the side wall of the second end of the prefabricated column body 11, each of which is located at the four corners of the second end of the prefabricated column body 11, and one end of each column longitudinal reinforcement 12 is plug-welded to the prefabricated column cassette connector 14 at the corresponding position. Correspondingly, four first bolts 13 are pre-embedded at the top of the first end of the prefabricated column body 11, and one end of the first bolt 13 located inside the prefabricated column body 11 is connected or overlapped with the column longitudinal reinforcement 12 at the corresponding position. The column longitudinal reinforcement 12 and the first bolt 13 of this embodiment are both made of steel, and the first bolt 13 is a prestressed long-rod bolt, which adopts a high-strength double-headed long-rod bolt. Stud bolts with long rods should comply with the current national standards "Technical Conditions for High-Strength Large Hexagon Head Bolts, Large Hexagon Head Nuts and Washers for Steel Structures" GB / T 1231 and "Mechanical Properties of High-Strength Stud Bolts, Nuts and Washers" Q / AYLT 05.

[0049] Furthermore, if Figure 1 and Figure 5 As shown, the middle part of the prefabricated column 1 of this embodiment also includes a beam-column connection position, and a beam top rib 15 is pre-embedded on at least one side of the prefabricated column body 11 above the beam-column connection position. Preferably, two beam top ribs 15 are pre-embedded on one side, one end of the beam top rib 15 extends out of the side of the prefabricated column body 11 and is perpendicular to the side of the prefabricated column body 11, and the other end of the beam top rib 15 is pre-embedded inside the prefabricated column body 11 and bent into an L shape.

[0050] A pre-buried steel plate 16 is provided at the lower part of the beam-column connection position, and a bolt connection hole 17 is provided on the pre-buried steel plate 16. The bolt connection hole 17 extends inward from the pre-buried steel plate 16 to penetrate the prefabricated column body 11. Figure 5 Preferably, an embedded pad 110 is further provided on the other side of the prefabricated column body 11 opposite to the embedded steel plate 16 , and the bolt connection hole 17 extends inward from the embedded steel plate 16 to penetrate the prefabricated column body 11 and the embedded pad 110 .

[0051] like Figure 4 and Figure 5 As shown, the prefabricated beam 2 of this embodiment includes a prefabricated beam body 21, and one end of the prefabricated beam body 21 to be assembled with the prefabricated column 1 is provided with a prefabricated beam box-type connector 22, and the prefabricated beam box-type connector 22 can be bolted to the prefabricated column 1 through the bolt connection hole 17. Further, the prefabricated beam box-type connector 22 is a cubic structure and is made of stainless steel. The first end of the prefabricated beam box-type connector 22 is flush with the end of the prefabricated beam body 21 to be assembled with the prefabricated column 1, and a threaded hole is provided on the first end of the prefabricated beam box-type connector 22.

[0052] The upper surface of the precast beam body 21 is provided with a plurality of precast beam stirrups 23 arranged evenly, and the lower ends of the precast beam stirrups 23 are embedded in the precast beam body 21 to cooperate with the beam top reinforcement 15 during assembly. Specifically, the upper surface of the precast beam body 21 is provided with two rows of evenly spaced precast beam stirrups 23, and the lower ends of each precast beam stirrup 23 are embedded in the precast beam body 21, and the upper ends are bent inwardly into an L shape.

[0053] During assembly, the two beam top bars 15 on the side of the precast column body 11 extend into the L-shaped space formed by the precast beam stirrups 23 on the top of the precast beam body 21. At the same time, the threaded holes on the precast beam box connector 22 are opposite to the bolt connection holes 17 on the precast column 1. A high-strength double-headed long-rod bolt 8 is used to pass through the embedded pad 110, the bolt connection holes 17 on the precast column body 11 and the embedded steel plate 16, and the threaded holes on the precast beam box connector 22. The long-rod bolt 8 is tightened in the precast beam box connector 22 by a nut, thereby realizing the assembly connection between the precast column 1 and the precast beam 2.

[0054] Preferably, a bracket mounting hole 111 is also provided on the embedded steel plate 16. Figure 1 As shown, the bracket installation hole 111 is located below the bolt connection hole 17 and is used to install the detachable bracket 4. Before the prefabricated column 1 is assembled and connected with the prefabricated beam 2, the detachable bracket 4 is installed first. When the prefabricated column 1 is assembled with the prefabricated beam 2, the prefabricated beam 2 is mounted on the detachable bracket 4, thereby supporting the prefabricated beam 2. Figure 5 In addition, at least one side wall of the precast column box connector 14 and the precast beam box connector 22 is opened for installing nuts during assembly and grouting after assembly is completed.

[0055] A plurality of precast beam lower longitudinal reinforcements 25 parallel to each other are also provided inside the precast beam body 21 , and one end of the precast beam lower longitudinal reinforcement 25 is plug-welded to the precast beam box-type connector 22 .

[0056] Furthermore, the first end surface and the second end surface of the prefabricated column body 11 are respectively provided with a first shear key groove 18. During assembly, the first shear key groove 18 of the current prefabricated column 1 can be positioned opposite to the first shear key groove 18 of another prefabricated column. A second shear key groove 24 is provided on the end surface of the prefabricated beam body 21 to be assembled with the prefabricated column, and a third shear key groove 19 that cooperates with the second shear key groove 24 is provided at the beam-column connection position of the side wall of the prefabricated column body 11. After assembly is completed, the first shear key groove 18, the second shear key groove 24 and the third shear key groove 19 need to be grouted respectively to enhance the shear resistance between the prefabricated columns and at the assembly position of the prefabricated column and the prefabricated beam.

[0057] In addition, a PVC pipe 26 is provided on the upper surface of the precast beam body 21 . The PVC pipe 26 passes through the precast beam body 21 and communicates with the precast beam box-type connector 22 , so as to be used for grouting the precast beam box-type connector 22 .

[0058] The side wall of the precast column body 11 of this embodiment is also provided with a first hanging nail 112 for fixing the sling for transporting the precast column. Similarly, the precast beam stirrups 23 of the precast beam 2 are provided with a second hanging nail 27 for fixing the sling for transporting the precast beam.

[0059] In summary, a prefabricated column 1 is pre-embedded with a prefabricated column cassette connector 14 at the column end. During the production of the prefabricated column 1, the prefabricated column cassette connector 14 is connected to the column longitudinal reinforcement 12 by plug welding. The beam top reinforcement 15 is pre-embedded at the beam-column connection position. A first shear key groove 18 and a third shear key groove 19 are provided. An embedded steel plate 16 and an embedded pad 110 are provided, wherein the embedded steel plate 16 is provided with a reserved bolt connection hole 17 and a corbel mounting hole 111. Finally, concrete is poured in one piece. After the pouring is completed, a first hanging nail 112 is provided to fix the sling for transportation of the prefabricated column.

[0060] The prefabricated columns 1 of this embodiment have two types of connections, namely, the connection between the prefabricated columns (such as Figure 2 as shown) and the connection between the precast columns and the precast foundation (as shown Figure 3 As shown), the prefabricated columns are connected to each other through the prefabricated column cassette connector of the upper prefabricated column and the first bolt extending from the lower prefabricated column, the first bolt is a high-strength bolt, and the high-strength bolt and the prefabricated column cassette connector are fastened by high-strength nuts; the prefabricated column and the prefabricated foundation are connected through the prefabricated column cassette connector of the prefabricated column and the high-strength bolt of the prefabricated foundation, the high-strength bolt and the prefabricated column cassette connector of the prefabricated column are leveled and fastened by high-strength nuts, and a shear key groove is set between the column bottom and the foundation.

[0061] The precast beam 2 is pre-embedded with a precast beam box-type connector 22 at the connection position between the beam end and the precast column. Its inner wall is welded to the lower longitudinal reinforcement 25 of the precast beam by a corner weld, and the upper surface plate is welded to the precast beam stirrups above it. After the high-strength bolts are passed through the precast column, they are respectively connected to the embedded pads of the precast column and the precast beam box-type connector bolts using high-strength nuts. A second shear key groove is reserved, and precast beam stirrups are set during prefabrication to facilitate the embedded beam top reinforcement in the precast column to extend between the precast beam stirrups when the beam and column are connected. A detachable corbel 4 is used for support during the installation process, and the post-casting layer 7 is poured after the installation is completed.

[0062] In the box-type connection prefabricated concrete frame structure provided by the present invention, structural components such as prefabricated columns and prefabricated beams are all produced in a factory-based manner, which improves the quality of prefabricated components while also achieving the unification of standardization and diversification of key components. The frame structure involves an industrialized construction method of standardized design, factory-based production, and assembly construction. Compared with the prior art, it has the advantages of significantly reduced wet work, high assembly rate, short construction period, energy conservation, environmental protection, low carbon emission reduction, low comprehensive cost, and high cost performance. The node structure in the box-type connection prefabricated concrete frame structure is relatively simple, the components do not have reinforcement, and a relatively simple and convenient component connection method is adopted. During installation and after the earthquake, hidden dangers can be quickly detected, and the advantages of the prefabricated structure in cost and efficiency are fully utilized. The problems of the complex node structure of the prior art, the common reinforcement of the components leading to low production and installation efficiency, and the difficulty in detecting hidden dangers are solved. In addition, the frame structure can be arranged as needed with single-span and multi-span, single-layer and multi-layer structures, meeting the current demand for flexible structural layout.

[0063] Embodiment 2

[0064] Based on the first embodiment, this embodiment provides a construction method of a box-type connected assembled concrete frame structure, including:

[0065] S1: Bolt the prefabricated column 1 on the prefabricated column 1 with the high-strength bolts (second bolts 31) extending from the prefabricated foundation 3 to complete the connection between the prefabricated column 1 and the prefabricated foundation 3;

[0066] S2: Bolt the prefabricated column cassette connector 14 of the upper prefabricated column 1 to the first bolt 13 extending from the upper surface of the lower prefabricated column 1 to complete the connection between different prefabricated columns 1;

[0067] S3: overlap the column longitudinal reinforcement 12 of the precast column 1 and the precast beam stirrup 23 of the precast beam 2, and bolt the precast beam box connector 22 of the precast beam 2 to the precast column 1 to complete the connection between the precast column 1 and the precast beam 2;

[0068] S4: After the overall frame is installed, the precast column box connector 14, the precast beam box connector 22, and the key grooves (the first shear key groove 18, the third shear key groove 19, and the second shear key groove 24) on the precast column 1 and the precast beam 2 are grouted using the grouting material 5;

[0069] S5: pouring the post-cast layer 7 on the upper surface of the precast beam 2.

[0070] Specifically, the assembly sequence of the box-type connector prefabricated concrete frame structure is as follows: first, the prefabricated column and the prefabricated foundation are installed and connected, and the prefabricated column box-type connector 14 on the prefabricated column 1 is bolted to the high-strength bolts extending from the prefabricated foundation 3; secondly, the prefabricated columns are installed and connected, and the prefabricated column box-type connector 14 of the upper prefabricated column 1 is bolted to the first bolt 13 extending from the upper surface of the lower prefabricated column 1; then, the prefabricated beams and columns are installed and connected, the column longitudinal reinforcement 12 of the prefabricated column 1 is overlapped with the prefabricated beam stirrups 23 of the prefabricated beam 2, and the prefabricated beam box-type connector 22 of the prefabricated beam 2 is bolted to the prefabricated column 1; after the overall frame is installed, the keyway and the connector are grouted with high-strength grouting material 5, and the post-cast layer 7 on the upper surface of the prefabricated beam 2 is poured; finally, the prefabricated composite slab 9 and the prefabricated steel staircase 10 are installed.

[0071] The precast columns in the core area of ​​the node of the present invention are continuous without post-poured concrete, and the precast columns are connected in the column, and the column-to-column connection is moved to the column-to-column position where the force is the smallest, thereby improving the bearing capacity. The box-type connector at the lower end of the precast beam can make the plastic hinge appear at the beam end position, thereby reducing the risks of local damage, excessive deformation, reduced seismic performance, etc. caused by the formation of plastic hinges in the core area of ​​the beam-column node under the action of an earthquake, thereby improving the rigidity and strength of the structure, and having positive significance for the seismic resistance of the structure and the service life of the building; the precast column box-type connector and the precast beam box-type connector can be completely hidden under the finished surface of the building, and will not affect the subsequent construction of the building and the aesthetics of the structure.

[0072] In the several embodiments provided by the present invention, it should be understood that the apparatus and method disclosed by the present invention can be implemented in other ways. For example, the apparatus embodiments described above are only illustrative, for example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation, for example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0073] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0074] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A box-type connection assembled concrete frame structure, characterized in that: It comprises a prefabricated column (1) and a prefabricated beam (2), wherein: The prefabricated column (1) comprises a prefabricated column body (11), the interior of the prefabricated column body (11) comprises a plurality of column longitudinal ribs (12) arranged longitudinally, a plurality of first bolts (13) are pre-buried at the top of the first end of the prefabricated column body (11), a plurality of prefabricated column cassette connectors (14) are arranged on the side wall of the second end of the prefabricated column body (11), one end of the column longitudinal rib (12) is connected to the prefabricated column cassette connector (14) at a corresponding position, and the prefabricated column cassette connector (14) can be bolted to the first bolt (13) on another prefabricated column through a nut; The middle part of the prefabricated column (1) also includes a beam-column connection position, a beam top rib (15) is pre-embedded on the prefabricated column body (11) above the beam-column connection position, a pre-embedded steel plate (16) is provided below the beam-column connection position, a bolt connection hole (17) is provided on the pre-embedded steel plate (16), and the bolt connection hole (17) extends inward from the pre-embedded steel plate (16) to penetrate the prefabricated column body (11); The prefabricated beam (2) comprises a prefabricated beam body (21), one end of the prefabricated beam body (21) to be assembled with the prefabricated column (1) is provided with a prefabricated beam box-type connecting piece (22), and the prefabricated beam box-type connecting piece (22) can be bolted to the prefabricated column (1) through the bolt connection hole (17); the top of the prefabricated beam body (21) is provided with a plurality of prefabricated beam stirrups (23) arranged evenly, and the lower ends of the prefabricated beam stirrups (23) are pre-embedded in the interior of the prefabricated beam body (21) for cooperating with the beam top reinforcement (15) during assembly.

2. The box-type connection assembled concrete frame structure according to claim 1 is characterized in that: The first end surface and the second end surface of the prefabricated column body (11) are respectively provided with a first shear key groove (18); during assembly, the first shear key groove (18) of the current prefabricated column (1) can be positioned opposite to the first shear key groove (18) of another prefabricated column.

3. The box-type connection assembled concrete frame structure according to claim 1 is characterized in that: A second shear key groove (24) is provided on one end surface of the prefabricated beam body (21) to be assembled with the prefabricated column, and a third shear key groove (19) cooperating with the second shear key groove (24) is provided on the beam-column connection position of the side wall of the prefabricated column body (11).

4. The box-type connection assembled concrete frame structure according to claim 1 is characterized in that: The interior of the prefabricated column body (11) comprises four column longitudinal ribs (12) arranged longitudinally, and four prefabricated column box-type connecting pieces (14) are arranged on the second end side wall of the prefabricated column body (11), and one end of each column longitudinal rib (12) is welded to the prefabricated column box-type connecting piece (14) at a corresponding position.

5. The box-type connection assembled concrete frame structure according to claim 4 is characterized in that: Four first bolts (13) are pre-buried at the top of the first end of the prefabricated column body (11), and one end of the first bolt (13) located inside the prefabricated column body (11) is connected or overlapped with the column longitudinal reinforcement (12) at the corresponding position; A bolt hole is provided on one side of the prefabricated column box-type connecting member (14) close to the end of the prefabricated column body (11); the first bolt (13) of the current prefabricated column (1) can pass through the bolt hole to be bolted to another prefabricated column (1).

6. The box-type connection assembled concrete frame structure according to claim 1 is characterized in that: A plurality of precast beam lower longitudinal reinforcements (25) parallel to each other are also arranged inside the precast beam body (21), and one end of the precast beam lower longitudinal reinforcement (25) is fixedly connected to the precast beam box-type connecting piece (22).

7. The box-type connection assembled concrete frame structure according to claim 1 is characterized in that: The prefabricated column box-type connector (14) and the prefabricated beam box-type connector (22) are both cubic structures and made of stainless steel; at least one side wall opening of the prefabricated column box-type connector (14) and the prefabricated beam box-type connector (22) is used for installing nuts during assembly and for grouting when assembly is completed.

8. The box-type connection assembled concrete frame structure according to claim 1 is characterized in that: A PVC pipe (26) is also provided on the upper surface of the precast beam body (21); the PVC pipe (26) passes through the precast beam body (21) and is connected to the precast beam box-type connector (22) for grouting the precast beam box-type connector (22).

9. The box-type connection assembled concrete frame structure according to claim 1, characterized in that: An embedded pad (110) is also provided on the other side of the prefabricated column body (11) opposite to the embedded steel plate (16), and the bolt connection hole (17) extends inward from the embedded steel plate (16) to penetrate the prefabricated column body (11) and the embedded pad (110).

10. A construction method of the box-type connection assembled concrete frame structure according to claims 1 to 9, characterized in that: include: The prefabricated column cassette connector on the prefabricated column is bolted to the second bolt extending from the prefabricated foundation to complete the connection between the prefabricated column and the prefabricated foundation; The prefabricated column cassette connector of the upper prefabricated column is bolted to the first bolt extending from the upper surface of the lower prefabricated column to complete the connection between different prefabricated columns; The longitudinal reinforcement of the precast column is overlapped with the top reinforcement of the precast beam, and the precast column is bolted to the precast column through the precast beam box connector of the precast beam to complete the connection between the precast column and the precast beam; After the overall frame is installed, grouting material is used to grout the precast column box connectors, precast beam box connectors, and keyways on the precast columns and precast beams; Pour the post-cast layer on the upper surface of the precast beam.

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