A precast concrete beam-column connection structure and precast building
Patent Information
- Application Number
- CN202521853944.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2026-09-01
- Estimated Expiration
- 2035-08-29
AI Technical Summary
套筒内灌浆及梁柱连接部位后浇混凝土需要依赖浆体或混凝土凝结形成强度，连接部位仍属于现浇混凝土范畴，受限于节点连接部位强度形成需要时间，因而目前的装配式混凝土结构整体施工工期上并无优势
本申请中的预制混凝土梁柱连接结构包括了柱端连接件和多个梁端连接件，在柱端连接件与梁端连接件进行连接时，梁端连接件的上翼缘板和下翼缘板分别靠近柱端连接件中柱节点型钢的上下两侧，且梁端连接件的腹板延伸至柱节点型钢的侧壁并与柱节点型钢连接，上翼缘板和下翼缘板分别与柱节点型钢的上下两侧焊接连接。这样的连接方式能够更好的保障梁体和柱体连接处的连接强度，从而能够减少因施工荷载或偶然作用引发局部损伤的风险。
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Abstract
Description
Technical Field
[0001] This application relates to the field of prefabricated building technology, specifically to a precast concrete beam-column connection structure and a precast building. Background Technology
[0002] There are two main types of traditional building structural systems: reinforced concrete structures and steel structures. Compared to steel structures, traditional cast-in-place reinforced concrete structures are cheaper, more durable, offer greater comfort, and have lower maintenance costs. However, due to the on-site casting method and the time required for concrete strength development, the construction cycle is relatively long. Steel structures offer faster construction speeds, but the cost of steel and subsequent maintenance costs, such as fire prevention and rust prevention, are higher than those of concrete structures. In current prefabricated concrete structures, reinforcing bars are connected using grouted sleeves, and beam-column intersections are connected using cast-in-place concrete. The grouting within the sleeves and the subsequent concrete pouring at beam-column connections rely on the grout or concrete to set and develop strength. Since the connection points still fall under the category of cast-in-place concrete, and the strength development of these joints requires time, current prefabricated concrete structures do not offer an overall advantage in construction time. This application fully combines the advantages of reinforced concrete and steel: the lower cost of reinforced concrete and the faster installation speed of steel structures. The main beams and columns are prefabricated in the factory using reinforced concrete, with embedded steel sections at the ends. During on-site assembly, the prefabricated concrete components are connected using steel structures. This achieves the advantages of using reinforced concrete as the main structural material, resulting in lower costs, while maintaining the same fast construction and installation speed as steel structures.
[0003] On the other hand, the concrete section at the connection between the precast concrete beam end and the steel section is relatively small, making it prone to forming 45-degree shear cracks under principal tensile stress. Figure 8 As shown in the figure, engineers need to develop structural designs with superior shear and crack resistance. Summary of the Invention
[0004] The first aspect of this application provides a precast concrete beam-column connection structure, which has stronger connection strength at the connection between the beam and the column, thereby reducing the risk of local damage caused by construction loads or accidental actions.
[0005] The precast concrete beam-column connection structure provided in the first aspect of this application includes: a column end connector, which is fixedly connected to the column body. The column end connector includes at least one column node steel, a portion of which is located inside the column body and another portion is exposed on the side wall of the column body. At least one column node steel extends to the side of the column body. At least one beam end connector is fixedly embedded in the end face of the beam body. The beam end connector includes an integral upper flange plate, a lower flange plate, and a web plate. The upper flange plate and the lower flange plate are located on both sides of the web plate, and the length of the web plate is greater than the length of the upper flange plate and the lower flange plate. The column end connector and the beam end connector are in a connected state. In the connected state, the upper flange plate and the lower flange plate are close to the upper and lower sides of the column node steel, respectively. The web plate extends to the side wall of the column node steel and is connected to the column node steel. The upper flange plate and the lower flange plate are welded to the upper and lower sides of the column node steel, respectively.
[0006] In addition, the precast concrete beam-column connection structure provided in this application may also have the following additional technical features: In one alternative embodiment, the beam end connector further includes a plurality of web studs, which are spaced apart on the web; at least two additional reinforcement bars are provided in the beam body, which are located on both sides of the web thickness direction, and the additional reinforcement bars are bent at the web studs and contact or abut against the outer web studs.
[0007] In one alternative embodiment, the beam end connector further includes a pair of additional reinforcement connecting plates and shear plates, with a preset angle between the additional reinforcement connecting plates and the shear plates; at least two additional reinforcements are provided in the beam body, with the at least two additional reinforcements located on both sides of the web thickness direction, and the additional reinforcement connecting plates are welded to the corresponding additional reinforcements.
[0008] In one alternative embodiment, the column joint steel has an extended bracket, and the extended bracket and the web are respectively provided with a plurality of bolt holes, and the extended bracket and the web are connected by bolts provided in the bolt holes.
[0009] In one alternative embodiment, the beam body is provided with a plurality of longitudinal reinforcement bars, the longitudinal reinforcement bars extending along the length direction of the beam body, the plurality of longitudinal reinforcement bars are arranged in a frame shape in the beam body and connected by stirrups, and the beam end connector is welded to at least a portion of the longitudinal reinforcement bars.
[0010] In one alternative embodiment, the column body is provided with a plurality of column reinforcement bars, the length direction of the column reinforcement bars extending along the length direction of the column body, the plurality of column reinforcement bars being arranged in a frame shape within the column body and connected by stirrups, and the column end connector being welded to at least a portion of the column reinforcement bars.
[0011] In one alternative, the column node steel passes through the gap between some of the column internal reinforcement bars. When the column node steel cannot avoid the column internal reinforcement bars, the column internal reinforcement bars are cut off at the position of the column node steel and welded to the column node steel through a column reinforcement connecting plate.
[0012] In one alternative embodiment, the upper flange plate and the lower flange plate are respectively provided with inwardly tapered sections on the side facing the column joint steel section. The width of the inwardly tapered sections decreases linearly from one side of the beam body to the side of the column joint steel section, and the width of the outer end of the inwardly tapered sections is the same as the width of the column joint steel section.
[0013] In one alternative embodiment, the column end connector further includes a core column steel profile, which is located between multiple column node steel profiles and is connected to each of the multiple column node steel profiles.
[0014] The second aspect of this application provides a prefabricated building, including multiple columns and multiple beams, wherein the beams and columns are fixedly connected by connectors, and the connectors are the prefabricated concrete beam-column connection structures provided in the first aspect.
[0015] The beneficial effects of this application are as follows: The precast concrete beam-column connection structure in this application includes column-end connectors and multiple beam-end connectors. When the column-end connectors are connected to the beam-end connectors, the upper and lower flange plates of the beam-end connectors are respectively close to the upper and lower sides of the column node steel in the column-end connector, and the web of the beam-end connector extends to the sidewall of the column node steel and connects to it. The upper and lower flange plates are welded to the upper and lower sides of the column node steel, respectively. This connection method can better ensure the connection strength at the beam and column connection, thereby reducing the risk of local damage caused by construction loads or accidental actions.
[0016] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description
[0017] Figure 1 A schematic diagram of the installation structure of the precast concrete beam-column connection structure provided in this application; Figure 2 This is a schematic diagram of the connection structure of the column end connector and the beam end connector in a specific embodiment. Figure 3 This is a schematic diagram of the connection structure of the column end connector and the beam end connector in another specific embodiment; Figure 4 This is a schematic diagram of the connection structure between the beam end connector and the longitudinal reinforcement of the beam. Figure 5This is a structural schematic diagram of a beam end connector in one specific embodiment; Figure 6 This is a structural schematic diagram of a column end connector in one specific embodiment; Figure 7 This is a schematic diagram of the connection structure between the column end connector and the beam end connector in yet another specific embodiment; Figure 8 This is a schematic diagram of the shear-resistant diagonal crack generated under principal tensile stress, as mentioned in the background art.
[0018] Reference numerals: 1. Column end connector, 11. Column node steel, 12. Outwardly extending corbel, 13. Core column steel, 2. Column body, 21. Inner reinforcement of column, 3. Beam end connector, 31. Upper flange plate, 32. Lower flange plate, 33. Web plate, 34. Web plate stud, 35. Inwardly recessed section, 36. Additional reinforcement connecting plate, 37. Shear plate, 4. Beam body, 41. Additional reinforcement, 42. Beam longitudinal reinforcement, 5. Bolt hole.
[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation
[0020] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.
[0021] It should be understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other technical solutions obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0022] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.
[0023] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0024] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.
[0025] like Figure 1-7 As shown, the first aspect of this application provides a precast concrete beam-column connection structure, which mainly includes a column end connector 1 and multiple beam end connectors 3. The column end connector 1 is fixedly connected to the column 2 and includes multiple column node steel sections 11. The column node steel sections 11 are embedded in the node core area of the precast column 2, with a portion of the column node steel sections 11 located inside the column 2 and another portion exposed on the side wall of the column 2. The multiple column node steel sections 11 extend to multiple sides of the column 2. The beam end connectors 3 are fixedly pre-installed on the end face of the beam 4 and include an integral upper flange plate 31, a lower flange plate 32, and a web plate 33. The upper flange plate 31 and the lower flange plate 32 are located on both sides of the web plate 33, and the length of the web plate 33 is greater than the lengths of the upper flange plate 31 and the lower flange plate 32.
[0026] The column end connector 1 and the beam end connector 3 are in a connected state. In the connected state, the upper flange plate 31 and the lower flange plate 32 are close to the upper and lower sides of the column node steel 11, respectively. The web plate 33 extends to the side wall of the column node steel 11 and is connected to the column node steel 11. The upper flange plate 31 and the lower flange plate 32 are welded to the upper and lower sides of the column node steel 11, respectively.
[0027] In this embodiment, the precast concrete beam-column connection structure includes a column end connector 1 and multiple beam end connectors 3. When the column end connector 1 is connected to the beam end connectors 3, the upper flange plate 31 and the lower flange plate 32 of the beam end connector 3 are respectively close to the upper and lower sides of the column node steel 11 in the column end connector 1, and the web plate 33 of the beam end connector 3 extends to the side wall of the column node steel 11 and connects with the column node steel 11. The upper flange plate 31 and the lower flange plate 32 are respectively welded to the upper and lower sides of the column node steel 11. This connection method can better ensure the connection strength at the connection between the beam 4 and the column 2, thereby reducing the risk of local damage caused by construction loads or accidental actions.
[0028] like Figure 2-5As shown, in one specific embodiment, the beam end connector 3 further includes a plurality of web studs 34, which are spaced apart on the web 33. At least two additional reinforcing bars 41 are provided within the beam body 4, located on both sides of the web 33 in the thickness direction. The additional reinforcing bars 41 are bent at the web studs 34 and contact or abut against the outer web studs 34. Specifically, one additional reinforcing bar 41 is provided on each side of the web 33 in the thickness direction within the beam body 4, hooking onto the outer web studs 34. The web studs 34 provide shear bearing capacity in the steel-concrete connection zone under construction conditions (when the steel connection section is not poured with concrete), and the additional reinforcing bars 41 provide flexural bearing capacity in the negative bending moment zone of the precast concrete beam end under construction conditions.
[0029] like Figure 7 As shown, in one specific embodiment, the beam end connector 3 further includes a pair of additional reinforcement connecting plates 36 and shear plates 37, with a preset included angle between the additional reinforcement connecting plates 36 and the shear plates 37; at least two additional reinforcements 41 are provided in the beam body 4, with the at least two additional reinforcements 41 located on both sides of the web 33 in the thickness direction, and the additional reinforcement connecting plates 36 are welded to the corresponding additional reinforcements 41.
[0030] Specifically, in this embodiment, the additional reinforcement connecting plate 36 and the shear plate 37 can be an integral structure, and the two sets of additional reinforcement connecting plates 36 and shear plates 37 arranged in pairs are located on both sides of the web 33 in the thickness direction. The additional reinforcement connecting plate 36 is located below the additional reinforcement 41 and is welded to the additional reinforcement 41. The end of the shear plate 37 away from the additional reinforcement connecting plate 36 is connected to the steel reinforcement (beam longitudinal reinforcement 42 hereinafter) in the beam 4. The function of the shear plate 37 is: under normal circumstances, the beam 4 mainly relies on the stirrups set perpendicular to the beam axis to resist shear cracks. Shear cracks are cracks caused by the principal tensile stress, which is the result of the shear stress perpendicular to the beam axis at the beam end and the tensile stress along the beam axis. Since the shear cracks in the direction of the principal tensile stress are usually in an inverted octagonal shape at 45 degrees (relative to the column), the shear plate 37 in this embodiment can better resist this principal tensile stress and prevent crack formation and propagation.
[0031] like Figure 6 As shown, in one specific embodiment, the column joint steel section 11 has an extended corbel 12. Multiple bolt holes 5 are respectively provided on the extended corbel 12 and the web 33. The extended corbel 12 and the web 33 are connected by bolts located in the bolt holes 5. When the beam end connector 3 is connected to the column joint steel section 11, the web 33 is tightly attached to the wall surface of the extended corbel 12, and the bolt holes 5 of both are correspondingly positioned and connected by bolts.
[0032] like Figure 1 and Figure 4As shown, in one specific embodiment, a plurality of longitudinal beam bars 42 are provided within the beam body 4. The longitudinal beam bars 42 extend along the length direction of the beam body 4. The plurality of longitudinal beam bars 42 are arranged in a frame shape within the beam body 4 and connected by stirrups. The beam end connector 3 is welded to at least a portion of the longitudinal beam bars 42. Furthermore, a plurality of column internal steel bars 21 are provided within the column body 2. The column internal steel bars 21 extend along the length direction of the column body 2. The plurality of column internal steel bars 21 are arranged in a frame shape within the column body 2 and connected by stirrups. The column end connector 1 is welded to at least a portion of the column internal steel bars 21. Specifically, the plurality of longitudinal beam bars 42 within the beam body 4 and the beam end connector 3 can be welded together during prefabrication at the prefabrication plant, while the column internal steel bars 21 and the column end connector 1 are welded together on-site.
[0033] like Figure 1 and Figure 6 As shown, in one specific embodiment, the column node steel 11 passes through the gap between some of the column internal reinforcing bars 21. When the column node steel 11 cannot avoid the column internal reinforcing bars 21, the column internal reinforcing bars 21 are cut off at the position of the column node steel 11 and welded to the column node steel 11 through a column reinforcement connecting plate. In addition, the column end connector 1 also includes a core column steel 13, which is located between multiple column node steels 11 and is connected to multiple column node steels 11 respectively. Specifically, the core column steel 13 is provided at the intersection of multiple column node steels 11. The core column steel 13 extends above and below the surface of the steel flange. The core column steel 13 serves to connect the various column node steels 11 and improve the anchorage strength of the column node steel 11 in the concrete column.
[0034] like Figure 4-5 As shown, in one specific embodiment, the upper flange plate 31 and the lower flange plate 32 are respectively provided with inwardly tapered sections 35 on the side facing the column node steel 11. The width of the inwardly tapered section 35 decreases linearly from one side of the beam 4 to the side of the column node steel 11, and the width of the outer end of the inwardly tapered section 35 is the same as the width of the column node steel 11. Specifically, one side of the upper flange plate 31 and the lower flange plate 32 needs to be welded to the longitudinal reinforcement 42 of the beam. Therefore, the width on this side is approximately the same as the width of the combined longitudinal reinforcement 42 of the beam, that is, the width on this side meets the welding requirements of the reinforcement in the beam. The width of the inwardly tapered section 35 decreases linearly from one side of the beam 4 to the side of the column node steel 11, which can reserve a gap to facilitate the concrete pouring at the connection node. The inwardly tapered section 35 narrows on the side facing the column node steel 11 to facilitate welding with the column node steel 11.
[0035] like Figure 1As shown, a second aspect of this application provides a prefabricated building comprising multiple columns 2 and multiple beams 4. The beams 4 and columns 2 are fixedly connected by connectors, and these connectors are the prefabricated concrete beam-column connection structures provided in the first aspect embodiment. Because the prefabricated concrete beam-column connection structure in the first aspect embodiment can better ensure the connection strength at the connection between the beams 4 and columns 2, reducing the risk of local damage caused by construction loads or accidental actions, the structure of this prefabricated building is also more stable.
[0036] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A precast concrete beam-column connection structure, characterized in that, include: Column end connector (1), the column end connector (1) is fixedly connected to the column body (2), the column end connector (1) includes at least one column node steel (11), a part of the column node steel (11) is located inside the column body (2), and another part is exposed on the side wall of the column body (2), the column node steel (11) extends to the side of the column body (2); At least one beam end connector (3) is fixedly pre-installed on the end face of the beam body (4). The beam end connector (3) includes an integral upper flange plate (31), a lower flange plate (32), and a web plate (33). The upper flange plate (31) and the lower flange plate (32) are located on both sides of the web plate (33), and the length of the web plate (33) is greater than the length of the upper flange plate (31) and the lower flange plate (32). The column end connector (1) and the beam end connector (3) are connected. In the connected state, the upper flange plate (31) and the lower flange plate (32) are close to the upper and lower sides of the column node steel (11), respectively. The web plate (33) extends to the side wall of the column node steel (11) and is connected to the column node steel (11). The upper flange plate (31) and the lower flange plate (32) are welded to the upper and lower sides of the column node steel (11), respectively.
2. The precast concrete beam-column connection structure according to claim 1, characterized in that, The beam end connector (3) also includes a plurality of web studs (34), which are spaced apart on the web (33); at least two additional reinforcement bars (41) are provided in the beam body (4), which are located on both sides of the web (33) in the thickness direction, and the additional reinforcement bars (41) are bent at the web studs (34) and contact or abut against the web studs (34) on the outside.
3. The precast concrete beam-column connection structure according to claim 1, characterized in that, The beam end connector (3) further includes a pair of additional reinforcement connecting plates (36) and shear plates (37), with a preset angle between the additional reinforcement connecting plates (36) and the shear plates (37); at least two additional reinforcements (41) are provided in the beam body (4), and the at least two additional reinforcements (41) are located on both sides of the thickness direction of the web (33), and the additional reinforcement connecting plates (36) are welded to the corresponding additional reinforcements (41).
4. The precast concrete beam-column connection structure according to any one of claims 1-3, characterized in that, The column joint steel (11) has an extended bracket (12), and the extended bracket (12) and the web plate (33) are respectively provided with a plurality of bolt holes (5). The extended bracket (12) and the web plate (33) are connected by bolts provided in the bolt holes (5).
5. The precast concrete beam-column connection structure according to claim 4, characterized in that, The beam body (4) is provided with a plurality of longitudinal reinforcement bars (42), the longitudinal reinforcement bars (42) extend along the length direction of the beam body (4), the plurality of longitudinal reinforcement bars (42) are arranged in a frame shape in the beam body (4) and connected by stirrups, and the beam end connector (3) is welded to at least part of the longitudinal reinforcement bars (42).
6. The precast concrete beam-column connection structure according to claim 4, characterized in that, The column (2) is provided with a plurality of column steel bars (21), the length direction of the column steel bars (21) extends along the length direction of the column (2), the plurality of column steel bars (21) are arranged in a frame shape in the column (2) and connected by stirrups, and the column end connector (1) is at least partially surrounded in the frame of the plurality of column steel bars (21).
7. The precast concrete beam-column connection structure according to claim 6, characterized in that, The column node steel (11) passes through the gap between some of the column internal steel bars (21). When the column node steel (11) cannot avoid the column internal steel bars (21), the column internal steel bars (21) are cut off at the position of the column node steel (11) and welded to the column node steel (11) through the column reinforcement connecting plate.
8. The precast concrete beam-column connection structure according to any one of claims 1-3 or 5-7, characterized in that, The upper flange plate (31) and the lower flange plate (32) are respectively provided with a recessed section (35) on the side facing the column node steel (11). The width of the recessed section (35) decreases linearly from one side of the beam body (4) to the side of the column node steel (11), and the width of the outer end of the recessed section (35) is the same as the width of the column node steel (11).
9. The precast concrete beam-column connection structure according to any one of claims 1-3 or 5-7, characterized in that, The column end connector (1) further includes a core column steel (13), which is located between multiple column node steels (11) and is connected to multiple column node steels (11) respectively.
10. A prefabricated building, comprising a plurality of columns (2) and a plurality of beams (4), wherein the beams (4) are fixedly connected to the columns (2) by connectors, characterized in that, The connector is a precast concrete beam-column connection structure as described in any one of claims 1-9.