Node structure of prefabricated assembly type concrete beam column component

Abstract

The invention discloses a node structure of a prefabricated assembly type concrete beam column component. The node structure comprises a tenon, a lap joint, a wedge nail groove, a tenon tongue and a tongue hole. A tenon and a lapping opening are formed along the longitudinal symmetry center face of the prefabricated part in a dividing mode, the tenon and the lapping opening are matched in structure and size, one end of the tenon is embedded in the tenon, the other end of the tenon extends outwards from the end face of the tenon, the tongue hole is formed in the side end face of the lapping opening, the tenon is matched with the tongue hole, and the wedge nail groove is formed in the matching plane of the tenon and penetrates through the tenon in the transverse direction. The wedge nail grooves of the two prefabricated parts are oppositely buckled to form a wedge nail hole, a wedge nail penetrates through the wedge nail hole, the tongue hole is formed by a tongue hole embedded part, and the wedge nail groove is formed by a wedge nail groove embedded part; the joint structure adopts a wedge nail tenon structure, lap joint assembly is simple and easy to operate, assembly precision is easy to prefabricate and guarantee, assembly flexibility is higher, stability is good, site construction is friendly, and the joint structure is more suitable for connection between concrete prefabricated parts.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated concrete structures, and in particular to a node structure of prefabricated assembled concrete beam-column components. Background Art

[0002] Prefabrication technology has the advantages of resource conservation, high efficiency, and integrated assembly. It meets the standards of "four savings and one environmental protection" in terms of building energy conservation, fits the development of building industrialization, and is the focus of future building development.

[0003] The key to prefabricated structures lies in the design of the connection structure between components. In the construction industry, mortise and tenon structures are common wood connection methods. The nodes between components are connected with mortise and tenon structures, and the components form elastic load-bearing bodies. In the field of concrete assembly technology, mortise and tenon connection structures have many limitations. First, the error range of concrete prefabricated parts is large after molding. The ends of the components are directly cast into tenons or mortises. During on-site assembly, the degree of fit between the components is poor, or even impossible to assemble. It takes a lot of effort to repair and patch them, resulting in the connection between the components being not as stable as the cast-in-place structure. The integrity and strength of the prefabricated structure are not as good as those of the cast-in-place structure. Second, the existing visible mortise and tenon joint structure of concrete components is Most of the structures adopt open tenon and mortise structures. It is not easy to arrange steel bars around the mortise or mortise structure, and the structure around the mortise is weak. If it is used as a node structure of a column, the axial force direction can still meet the use requirements. If it is used as a beam structure, the shear force strength is particularly insufficient. The concrete structure needs to have a certain thickness to ensure the force strength, and the sizes of the tenon and mortise in the open tenon structure are in an opposing relationship. If the thickness around the mortise is larger, the thickness of the tenon must be reduced. Therefore, it is difficult to meet the force requirements of the beam component; third, after the node of the open tenon structure is assembled, it still has relative freedom of movement, and hard connections such as bolts need to be set to connect to achieve full positioning, which is not conducive to the disassembly and assembly efficiency during engineering pre-installation.

[0004] Therefore, in view of the unreasonable design of the node structure of the existing prefabricated structure, the present invention proposes a node structure suitable for prefabricated concrete assembly components. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a node structure of prefabricated assembled concrete beam-column components to solve one or more problems raised in the above-mentioned background technology.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] A node structure of a prefabricated assembled concrete beam-column component, the node structure comprising a tenon, an overlap, a wedge groove, a tenon tongue and a tongue eye located at the connection end of the prefabricated component;

[0008] The prefabricated components are divided along the longitudinal symmetrical center plane to form tenons and overlaps, the tenons and overlaps are of compatible structural dimensions, and the tenons and overlaps of two adjacent prefabricated components overlap and cooperate with each other to form the main structure of the node structure;

[0009] One end of the tenon tongue is embedded in the tenon, and the other end extends outward from the tenon end surface. The tongue eye is arranged on the side end surface of the overlap. The tenon tongue and the tongue eye cooperate to form a first limiting structure of the node structure.

[0010] The wedge nail groove is located on the matching plane of the tenon and penetrates the tenon in the transverse direction. The wedge nail grooves of the two prefabricated components are relatively buckled to form a wedge nail hole. The wedge nail is inserted into the wedge nail hole to form a second limiting structure of the node structure.

[0011] Among them, the tongue eye is formed by a tongue eye embedded part embedded in the prefabricated component, and the wedge nail groove is formed by a wedge nail groove embedded part embedded in the tenon; the tenon tongue, tongue eye embedded part and wedge nail groove embedded part are metal parts.

[0012] Furthermore, the node structure also includes a clamp, which is clamped tightly to the outside of the main structure.

[0013] Furthermore, a plurality of connection holes are provided on the tenon perpendicular to the mating plane, and the connection holes are symmetrically distributed on both sides of the wedge groove. The corresponding connection holes at adjacent ends of the prefabricated components are connected in series through bolt assemblies, and the connection holes are formed by connection hole embedded parts embedded in the tenon.

[0014] Furthermore, the tongue eye is a tongue groove, which has an end hole located on the side end surface of the overlap, and its groove faces the overlapping direction of the tenon, and the cross-section of the tongue eye embedded part is a U-shaped structure.

[0015] Furthermore, the tongue eye is a tongue hole, the opening of the tongue hole is located on the side end surface of the overlap, and the tongue eye embedded part is cylindrical.

[0016] Furthermore, the outer peripheral surfaces of the embedded section of the tenon, the tongue eye embedded part, the wedge groove embedded part and the connecting hole embedded part are integrally formed with a plurality of connecting ribs, which extend outward perpendicularly to the axial direction and have their ends bent to form hook-shaped feet. All the connecting ribs are distributed in the same plane and are symmetrically distributed in two rows on both sides of the central axis.

[0017] Furthermore, a first limiting hole is provided on the prefabricated component and passes through the tongue eye vertically, and a second limiting hole is provided on the tenon and passes through the tenon tongue vertically and axially, and the first limiting hole and the second limiting hole are fixedly connected by a pin.

[0018] Furthermore, the node structure also includes a protective layer cast and coated on the outside.

[0019] Compared with the prior art, the node structure of the prefabricated assembled concrete beam-column component of the present invention has the following beneficial effects:

[0020] The node structure adopts a wedge-nail-tenon structure, and the overlap assembly is simple and easy to operate. The structural dimension accuracy in the direction of concrete shrinkage has little effect on the assembly, and the assembly accuracy is easy to ensure by prefabrication. The on-site adaptability between the concrete prefabricated parts is higher, and it is more suitable for the connection between the concrete prefabricated parts. The connection ends of the prefabricated components are exactly the same, and the assembly flexibility is higher. The relatively full-limit connection between the prefabricated components can be completed by quick assembly, and the assembly stability is good and the on-site construction is friendly. In addition, the plug-in assembly in the wedge-nail-tenon structure is connected by metal embedded parts, and the prefabrication casting and maintenance have little effect on the plug-in limit structure. The assembly operability is strong and the connection and limit strength are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of Embodiment 1 of the node structure disclosed in the present invention;

[0022] Figure 2 This is a structural diagram of Embodiment 2 of the node structure disclosed in the present invention;

[0023] Figure 3 It is another structural schematic diagram of the second embodiment of the node structure disclosed in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the tongue hole embedded part;

[0025] Figure 5 It is a structural schematic diagram of the tongue and groove embedded parts;

[0026] Figure 6 It is a schematic diagram of the assembly structure of the embedded parts of the wedge nail groove;

[0027] Figure 7 It is a schematic diagram of the structure of the tenon.

[0028] In the figure: 1. Prefabricated component one; 11. First limiting hole; 12. Tenon; 13. Overlap; 14. Wedge nail groove; 15. Tongue hole; 16. Tongue groove; 17. Connecting hole; 2. Prefabricated component two; 3. Tenon; 31. Second limiting hole; 32. Plug-in section; 33. Embedded section; 4. Tongue hole embedded part; 41. Connecting rib foot; 5. Tongue groove embedded part; 6. Wedge nail groove embedded part; 7. Wedge nail. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only the best embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1: Aiming at the rapid and stable assembly of prefabricated concrete column components, this embodiment provides a node structure of prefabricated assembled concrete beam-column components, such as Figure 1 , Figure 4 , Figure 6 and Figure 7 As shown in the figure, the prefabricated component 1 and the prefabricated component 2 are connected by a node structure, and the node structure adopts a wedge-nail-tenon structure, which includes a tenon 12, an overlap 13, a wedge-nail groove 14, a tenon tongue 3 and a tongue eye; wherein,

[0031] The tenon 12 and the overlap 13 structure are integrally cast and formed with the main body of the prefabricated component, and are divided along the longitudinal symmetrical center plane of the prefabricated component, with one side being retained to form the tenon 12 and the other side being cut to form the overlap 13. The tenon 12 and the overlap 13 are adapted to each other in size, and the tenon 12 of the prefabricated component 1 is overlapped on the overlap 13 of the prefabricated component 2, and after being combined, a main structure of a node structure consistent with the main body of the prefabricated component is formed. The main structure is the main force-bearing part of the prefabricated column component, and its main force direction is the compressive stress along the axial direction. Compared with the existing node structure of the prefabricated component with an open tenon structure, the node main structure of this embodiment is easy to arrange steel bars, and since there is no thin structure around the mortise, it is easier to ensure the structural thickness and meet the force strength requirements of the concrete component;

[0032] The tenon 3 further limits the assembly freedom of the main structure, such as Figure 7 As shown, the tenon 3 is a metal embedded part, one end of which is embedded in the tenon 12 of the prefabricated component 1, and the other end extends outward from the end surface of the tenon 12. The end surface of the tenon 12 of the prefabricated component 2 is provided with a tongue eye of a hole structure, and the tongue eye is provided on the side end surface of the overlap 13. When the prefabricated component 1 and the prefabricated component 2 are cylindrically assembled along the axial direction, the tenon 12 and the overlap 13 are completed, and the tenon 3 is inserted into the tongue eye, and cooperates to form a first limiting structure of the node structure, which limits the relative freedom of the prefabricated component on the horizontal plane.

[0033] The assembly of the wedge nail groove 14 and the wedge nail 7 completes the full limit of the node structure. The wedge nail groove 14 is set on the matching plane of the tenon 12 in the horizontal direction and penetrates the tenon 12. When the prefabricated component 1 and the prefabricated component 2 are assembled in place, the wedge nail grooves 14 of the two are relatively buckled to form a wedge nail hole. The wedge nail 7 is inserted into the wedge nail hole to form a second limit structure of the node structure, which limits the axial relative movement of the prefabricated components.

[0034] In this embodiment, the tongue eye is a tongue hole 15, which is formed by a cylindrical tongue eye embedded part embedded in the prefabricated component, that is, Figure 4 The tongue hole embedded part 4 shown, the wedge nail groove 14 is formed by the wedge nail groove embedded part 6 embedded in the tenon 12; the tenon 3, the tongue hole embedded part 4 and the wedge nail groove embedded part 6 are metal parts;

[0035] Due to the characteristics of solidification shrinkage of concrete precast parts, the structural dimensions of concrete precast parts are difficult to control during casting and prefabrication. The open mortise and tenon node structure of the prior art is difficult to achieve good assembly accuracy. However, the node structure of this embodiment is an overlap fit, which requires that the length of the tenon 3, the fitting plane and the flatness of the side end face of the overlap 13 meet the accuracy requirements. It has low requirements for the structural dimensional accuracy of the cross-sectional plane with larger shrinkage, and is easier to ensure during prefabrication and maintenance. In addition, the relative dimensions of the tenon 3, the tongue hole embedded part 4 and the wedge nail groove embedded part 6 are easy to ensure during casting, and shrinkage has little effect on their relative dimensions. Therefore, from the aspects of casting and assembly, the wedge nail tenon node structure of this embodiment is more suitable for connection between concrete precast parts than the open mortise and tenon node structure. In addition, the connection ends of the precast components are exactly the same, there is no difference between mortise and tenon, the flexibility during assembly is higher, and the relative full-limit connection between the precast components can be completed by quick assembly. The assembly stability is good and the on-site construction is friendly.

[0036] As a further technical solution of this embodiment, in order to further enhance the bonding strength of the node structure, a clamp (not shown) is provided outside the main structure after the overlap connection, and the clamping force applied by the clamp further improves the overall force performance of the node structure; of course, alternatively, the connection of the node structure can also be enhanced by connecting with a bolt assembly, such as Figure 2 As shown, a plurality of connection holes 17 are provided on the tenon 12 perpendicular to the mating plane, and the connection holes 17 are symmetrically distributed on both sides of the wedge nail groove 14. After assembly is completed, the corresponding connection holes 17 of the prefabricated component 1 and the prefabricated component 2 are connected in series through the bolt assembly, and a pre-tightening force is applied to lock the two overlapping tenons 12. Similarly, the connection hole 17 is formed by embedding the connection hole 17 embedded part in the tenon 12.

[0037] As a further technical solution of this embodiment, Figure 4 , Figure 6 , Figure 7 As shown, the embedded section 33 of the tenon 3, the tongue hole embedded part 4 and the outer peripheral surface of the wedge nail groove embedded part 6 are integrally formed with a plurality of connecting ribs 41 for enhancing the bonding strength between the embedded parts and the precast concrete components. The connecting ribs 41 extend outward perpendicularly to the axial direction of the embedded parts, and the ends thereof are bent to form hook-shaped feet. In order to facilitate the embedded placement, all the connecting ribs 41 are distributed in the same plane and are symmetrically distributed in two rows on both sides of the central axis of the embedded parts.

[0038] As a further technical solution of this embodiment, after all the connections and assemblies of the node structure are completed, an external formwork is set up, and fine stone concrete is vacuum poured on site through vacuum equipment to form a concrete protective layer covering the outside of the node structure. During the pouring process of the protective layer, the gaps in the node structure are filled, and at the same time, protection is formed outside the node structure to isolate the influence of the external environment on the embedded parts, thereby increasing the service life of the node structure and making it aesthetically pleasing.

[0039] Embodiment 2: Precast column components are generally assembled by plug-in along the axial direction, while precast beam components are generally assembled by lap-jointing perpendicular to the axial direction, and the precast column components are mainly subjected to axial pressure, while the precast beam components are mainly subjected to vertical axial shear force and bending moment, so that their main force planes and force directions are different. Therefore, for the rapid and stable assembly of concrete precast beam components, this embodiment provides a node structure of precast assembled concrete beam-column components, and the main structure of the node structure is basically the same as that of embodiment 1, and this part will not be repeated. This embodiment only describes the differences between the two.

[0040] like Figure 2-Figure 3 and Figure 5 As shown, the assembly plane of the tenon 12 should be set perpendicular to the shear direction, the tongue eye is a tongue groove 16, and the tongue groove 16 has an end hole located on the side end surface of the overlap 13. The groove is located on the main body of the prefabricated component and faces the overlap direction of the tenon 12, as shown in FIG. Figure 2 The tongue and groove 16 and tenon 12 shown are overlapped and assembled perpendicular to the assembly plane. Figure 2 The tongue groove 16 shown is parallel to the assembly plane, which is suitable for the tenon 12 to be overlapped along the assembly plane. When the tenon 12 overlaps the opening 13, the tenon 3 is placed by the groove; accordingly, the tongue eye embedded part is a tongue groove embedded part 5 with a U-shaped cross-section structure, such as Figure 5 As shown, two rows of connecting ribs 41 are also arranged on both sides of the outer periphery.

[0041] As a further technical solution of the present embodiment, a first limiting hole 11 is provided on the prefabricated component 1 and passes through the tongue eye vertically. A second limiting hole 31 is provided on the tenon 3 of the prefabricated component 2 and passes through the tenon 3 vertically to the axial direction. The positions of the first limiting hole 11 and the second limiting hole 31 correspond to each other. After the assembly is completed, the first limiting hole 11 and the second limiting hole 31 are connected and fixed in series by pins to limit the relative movement of the prefabricated components along the assembly overlapping direction.

[0042] The directional words such as "upper", "lower", "side", "end", "vertical", "inner", "outer" mentioned in this article are described based on Figure 1-Figure 7 These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation;

[0043] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A node structure of a prefabricated concrete beam-column component, used for connecting adjacent ends of prefabricated components, characterized in that: The node structure includes a tenon, an overlap, a wedge groove, a tenon tongue and a tongue eye located at the connection end of the prefabricated component; The tenons and the overlaps are formed by segmenting along the longitudinal symmetrical center plane of the prefabricated component, the tenons and the overlaps have compatible structural dimensions, and the tenons and the overlaps of two adjacent prefabricated components overlap and cooperate with each other to form the main structure of the node structure; One end of the tenon tongue is embedded in the tenon, and the other end extends outward from the tenon end surface. The tongue eye is arranged on the side end surface of the overlap. The tenon tongue cooperates with the tongue eye to form a first limiting structure of the node structure. The wedge nail groove is located on the matching plane of the tenon and penetrates the tenon in the transverse direction. The wedge nail grooves of the two prefabricated components are relatively buckled to form a wedge nail hole. A wedge nail is inserted into the wedge nail hole to form a second limiting structure of the node structure; Among them, the tongue eye is formed by a tongue eye embedded part embedded in the prefabricated component, and the wedge nail groove is formed by a wedge nail groove embedded part embedded on the tenon; the tenon tongue, the tongue eye embedded part and the wedge nail groove embedded part are metal parts.

2. The node structure of the prefabricated assembled concrete beam-column member according to claim 1 is characterized in that: The node structure also includes a hoop, which is tightly clamped outside the main structure.

3. The node structure of the prefabricated assembled concrete beam-column member according to claim 1, characterized in that: The tenon is provided with a plurality of connection holes extending perpendicularly to the mating plane. The connection holes are symmetrically distributed on both sides of the wedge groove. The corresponding connection holes at adjacent ends of the prefabricated component are connected in series through a bolt assembly. The connection holes are formed by connection hole embedded parts embedded in the tenon.

4. The node structure of the prefabricated assembled concrete beam-column member according to claim 3 is characterized in that: The tongue eye is a tongue groove, which has an end hole located on the side end surface of the overlap, and its groove faces the overlapping direction of the tenon. The cross-section of the tongue eye embedded part is a U-shaped structure.

5. The node structure of the prefabricated assembled concrete beam-column member according to claim 3 is characterized in that: The tongue eye is a tongue hole, the opening of the tongue hole is located on the side end surface of the overlap, and the tongue eye embedded part is cylindrical.

6. The node structure of the prefabricated assembled concrete beam-column member according to claim 3 is characterized in that: The outer peripheral surfaces of the embedded section of the tenon, the tongue eye embedded part, the wedge nail groove embedded part and the connecting hole embedded part are integrally formed with a plurality of connecting ribs, the connecting ribs extend outward perpendicularly to the axial direction, and the ends thereof are bent to form hook-shaped feet, and all the connecting ribs are distributed in the same plane and are symmetrically distributed in two rows on both sides of the central axis.

7. The node structure of the prefabricated assembled concrete beam-column member according to claim 4, characterized in that: A first limiting hole is provided on the prefabricated component and passes through the tongue eye perpendicularly, and a second limiting hole is provided on the tenon tongue and passes through the tenon tongue perpendicularly to the axial direction. The first limiting hole and the second limiting hole are fixedly connected by a pin.

8. The node structure of the prefabricated assembled concrete beam-column member according to any one of claims 1 to 6, characterized in that: The node structure also includes a protective layer cast and coated on the outside.

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