Precast reinforced concrete frame column, and frame structure

Abstract

This invention discloses a precast reinforced concrete frame column and a frame structure, including a frame column body, an outer steel pipe, a steel end structure, and a steel connecting bracket. Based on the connection position of the external beam on the frame column body, the column reinforcement cage has an inward-facing annular groove. The outer steel pipe is fitted outside the annular groove of the column reinforcement cage, with its outer wall flush with the outer wall of the column concrete body. The steel end structure is embedded within the column concrete body. Adjacent frame columns are fixedly connected via the steel end structure. The steel connecting bracket is fixed between the outer steel pipe and the external beam. The frame structure includes precast reinforced concrete frame columns and main beams. Corresponding steel connecting brackets are provided on the outer wall of the outer steel pipe of the precast reinforced concrete frame column. The end of the main beam is fixed to the other end of the steel connecting bracket. This invention simplifies the structure and construction process of the frame columns, main beams, and secondary beams, reduces steel usage, and improves construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building technology, specifically to precast reinforced concrete frame columns and frame structures. Background Technology

[0002] In reinforced concrete prefabricated structural systems, the frame columns are segmented at the beam-column joint area, where the bending moment and shear force are at their maximum. To ensure the seismic resistance requirements of "strong joints and weak members," the joint area needs to be cast in place, resulting in wet work on site and a low assembly rate. The reinforcement is connected using grouted sleeves, making it difficult to test the connection strength, which has been widely criticized. Secondly, steel prefabricated structural systems are 20%-30% more expensive than reinforced concrete structural systems.

[0003] Steel-concrete composite prefabricated structural systems, the following two structural systems are currently the most typical: ① Prefabricated reinforced column-beam hybrid frame structure: This structure uses precast steel-reinforced concrete columns (or only steel reinforcement at the beam-column joint area) and precast reinforced concrete beams. Steel corbels at the ends of the precast beams are bolted and welded to the corbels of the precast steel-reinforced concrete columns. No further concrete is poured at the beam-column joint area. Disadvantages include: low-strength concrete encasing high-strength steel, resulting in low material utilization; wet work at the joint area; and high steel content, leading to uneconomical costs.

[0004] ② Partially encased steel-concrete composite structure technology: This technology consists of composite columns, composite beams, and composite shear walls formed by partially encasing steel components in concrete. The disadvantage is that the overall cost is 10%-20% higher than that of concrete structures. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, a precast reinforced concrete frame column and frame structure are provided, which simplifies the structure and construction process of frame columns, main beams, and secondary beams, reduces the use of steel, and improves construction efficiency.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: Firstly, precast reinforced concrete frame columns, including The main body of the frame column includes the column reinforcement cage and the column concrete body; The column is encased in a steel pipe. Based on the connection position of the external beam on the main body of the frame column, the column reinforcement cage is provided with an inward annular groove. The column encasing steel pipe is sleeved on the outside of the annular groove of the column reinforcement cage. Multiple first studs are fixed at intervals on the inner wall surface of the encasing steel pipe. The column encasing steel pipe and the first studs are embedded in the column concrete main body. The outer wall surface of the column encasing steel pipe is flush with the outer wall surface of the column concrete main body. The column steel end structure is fixedly connected to both the top and bottom of the column steel cage, and the column steel end structure is embedded in the column concrete body; two adjacent frame columns are fixedly connected by the column steel end structure. The column steel connecting brackets are arranged horizontally. One end of the column steel connecting bracket is fixed to the outer wall of the steel pipe covering the column, and the other end is fixedly connected to the external beam.

[0007] According to the above technical solution, it also includes a precast independent column foundation, and a column steel end structure is provided on the top of the precast independent column foundation.

[0008] According to the above technical solution, the column steel end structure includes a column steel end plate, which is welded and fixed to the top or bottom of the column steel cage; the two adjacent frame columns or the frame column and the independent foundation under the precast column are fixedly connected by welding between the column steel end plates.

[0009] According to the above technical solution, the column steel end structure includes a column steel end plate, an inner column connecting steel pipe and an outer column connecting steel pipe. The column steel end plate is welded and fixed to the top or bottom of the column steel cage. The inner column connecting steel pipe is sleeved on the outside of the column steel cage, with one end fixedly connected to one side of the column steel end plate and one end of the outer column connecting steel pipe fixedly connected to the other side of the column steel end plate. A fixed connection is achieved by welding the other end of the external steel pipe between two adjacent frame columns or between a frame column and an independent foundation under a precast column; and grout is injected into the cavity formed by the steel end plates of the two columns and the external steel pipe to form a concrete connection node.

[0010] According to the above technical solution, multiple second studs are fixed at intervals on the upper and lower surfaces of the column steel end plate, the inner surface of the internal connecting steel pipe of the column, and the inner surface of the external connecting steel pipe of the column.

[0011] Secondly, the frame structure includes precast reinforced concrete frame columns as described above, and several main beams; according to the design position of the main beams, corresponding column steel connecting brackets are set on the outer wall of the steel pipe encasing the precast reinforced concrete frame columns; the end of the main beam is fixed to the other end of the column steel connecting bracket.

[0012] According to the above technical solution, the main beam includes a beam body and an end connection structure; The main beam includes a beam reinforcement cage and a beam concrete main body; the end connection structure includes a beam end plate, an inner beam connecting steel pipe, and an outer beam connecting component; the beam end plate is welded and fixed to the end of the beam reinforcement cage and is embedded in the beam concrete main body; the inner beam connecting steel pipe is sleeved on the beam reinforcement cage, and the end of the inner beam connecting steel pipe is fixed to the beam end plate; several sets of through holes are provided at intervals on the inner beam connecting steel pipe, and a tie rod or tie bar is installed in each through hole; one end of the outer beam connecting component is fixed to the beam end end plate, and the other end is fixedly connected to the end of the column steel connecting bracket.

[0013] According to the above technical solution, the external beam connection assembly has two structural forms: one is a connection plate, and the other is an H-shaped beam connection bracket; according to the load-bearing capacity of the beam, two external connection assemblies with corresponding structural forms are set.

[0014] According to the above technical solution, it also includes secondary beams, which have the same structure as the main beams; A beam connecting steel pipe is provided on the main beam body; according to the connection position of the secondary beam on the main beam, an inward annular groove is provided on the beam reinforcement cage, and the beam connecting steel pipe is sleeved on the outside of the annular groove of the beam reinforcement cage; multiple third studs are fixed at intervals on the inner wall surface of the beam connecting steel pipe, the beam connecting steel pipe and the second studs are embedded in the beam concrete body, and the outer wall surface of the beam connecting steel pipe is flush with the outer wall surface of the beam concrete body. The beam connecting steel pipe is equipped with beam connecting components in a number and position that match the secondary beam, and the external beam connecting components at the ends of the secondary beam are fixedly connected to the beam connecting components.

[0015] According to the above technical solution, the beam connection assembly has two structural forms: one is a connection plate, and the other is an H-shaped beam connection bracket; according to the beam's load-bearing capacity, two external connection assemblies with corresponding structural forms are set.

[0016] The present invention has the following beneficial effects: 1. Due to the design of the column end structure, the connection node between two adjacent frame columns can be located in the middle of the floor, especially at or near the inflection point, where the bending moment is minimal or zero and the shear force is moderate. Furthermore, an annular groove for placing the column's outer steel pipe is provided in the middle of the column reinforcement cage. The column end structure is placed within this groove and cast integrally with the frame column body. The external main beam is fixed to the column's outer steel pipe via column steel connecting brackets, thus indirectly fixing it to the frame column body, forming a stable column-beam connection node.

[0017] The precast reinforced concrete frame column of this application has the following advantages: First, the setting of the column steel end structure allows the connection nodes between adjacent frame columns to be set only at places with smaller bending moments, thereby reducing the load-bearing capacity requirements of the connection nodes of the frame columns and making the construction of the frame columns more convenient. Only the ends of the column steel cage and the column steel end structure, as well as the column steel end structures between two adjacent frame columns, need to be fixedly connected. The node construction is simple and easy to install and construct.

[0018] Secondly, the frame columns contain only a small amount of steel in the joint area, resulting in low steel consumption; low steel consumption is more economical and reduces carbon emissions.

[0019] Third, the beam-column joints and column-column joints of the frame columns are all on the outside, with no basic or hidden works, making it easy to visually inspect, check, and test. The connection quality is very intuitive and easy to operate.

[0020] 2. The steel column end structure is designed in two forms: one that needs to transmit bending moment and the other that does not. This meets the needs of various usage scenarios, simplifies the structure of the frame column as much as possible, and reduces the amount of steel used and the difficulty of construction.

[0021] 3. When the frame column needs to transmit bending moment, internal and external connecting steel pipes are installed in the column, and the external connecting steel pipes of the two frame columns form a casting cavity. Grout is injected into the casting cavity through grouting holes, overflow holes, and post-grouting holes set on the external connecting steel pipes, so that a local steel-concrete composite column butt joint is formed in the casting cavity formed by the steel end structures of the two columns. This structural design can not only improve the bending moment resistance of the frame column, but also avoid wet work and reduce the construction difficulty.

[0022] 4. Two types of external beam connection components are provided at the ends of the main beams or secondary beams. When the beam is subjected to bending moment, H-shaped beam connecting brackets are used as external beam connection components between beams or between beams and frame columns. When the beam is not subjected to or is subjected to only a very small bending moment, connecting plates are used as external beam connection components between beams or between beams and frame columns. This meets the beam usage requirements under various working conditions and avoids redundancy in beam structure design.

[0023] 5. A beam connecting steel pipe, integrated with the main beam, is installed in the middle of the main beam. Two types of beam connecting components are used on the beam connecting steel pipe. Depending on whether the connection node between the beams is subject to bending moment, either a connecting plate or an H-shaped beam connecting bracket is selected as the beam connecting component. This meets the beam usage requirements under various working conditions. Furthermore, because of the beam connecting steel pipe and beam connecting components, the connection nodes of the secondary beams on the main beam are all on the outside, with no basic or hidden works, making it easy to visually inspect, test, and check. The connection quality is very intuitive and easy to operate.

[0024] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention.

[0026] Figure 1 This is the facade of the precast reinforced concrete frame column provided in the embodiment of the present invention; Figure 2 yes Figure 1 Sectional view of AA; Figure 3 This is a schematic diagram of a beam structure according to the first embodiment of the present invention; Figure 4 This is a schematic diagram of a beam structure according to a second embodiment of the present invention; Figure 5 yes Figure 4 Sectional view of BB; Figure 6 This is a schematic diagram of the connection between two frame columns provided in an embodiment of the present invention; Figure 7 yes Figure 6 Sectional view of CC; Figure 8 This is a schematic diagram of the beam connection structure on the frame column according to an embodiment of the present invention; Figure 9 yes Figure 8 Sectional view of DD; Figure 10 This is a schematic diagram of the structure of the precast independent column foundation provided in the embodiment of the present invention; Figure 11 This is a schematic diagram of the framework structure provided in an embodiment of the present invention; In the diagram: 1. Frame column main body; 1-1. Column reinforcement cage; 1-2. Column concrete main body; 2. Column outer steel pipe; 3. First shear stud; 4. Column steel end structure; 4-1. Column steel end plate; 4-2. Column inner connecting steel pipe; 4-3. Column outer connecting steel pipe; 4-4. Second shear stud; 5. Column steel connecting bracket; 6. Precast column independent foundation; 7. Beam main body; 7-1. Beam reinforcement cage; 7-2. Beam concrete main body; 8. End. Connection structure; 8-1, Beam end plate; 8-2, Inner beam connecting steel pipe; 8-3, Outer beam connecting assembly; 8-4, Tie rod or tie bar; 9, Connecting plate; 10, Beam connecting bracket; 11, Beam connecting steel pipe; 11-1, Third stud; 12, Beam connecting assembly; 13, Weld; 14, Overflow hole; 15, Post-grouting hole; 16, Grouting hole; 17, Casting cavity; 18, Clamping plate; A, Main beam; B, Secondary beam. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-11 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0028] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Reference Figure 1 , Figures 6-11 As shown, the precast reinforced concrete frame column provided by the present invention Example 1 include The main frame column 1 includes the column steel cage 1-1 and the column concrete main body 1-2; The column is encased in a steel pipe 2. According to the connection position of the external beam on the main body of the frame column, the column reinforcement cage is provided with an inward annular groove. The column encased in a steel pipe is sleeved on the outside of the annular groove of the column reinforcement cage. Multiple first studs 3 are fixed at intervals on the inner wall surface of the encased steel pipe. The column encased in a steel pipe and the first studs are embedded in the column concrete main body. The outer wall surface of the column encased in a steel pipe is flush with the outer wall surface of the column concrete main body. Column steel end structure 4: Column steel end structures are fixedly connected to both the top and bottom of the column steel cage. The column steel end structures are embedded in the column concrete body. Adjacent frame columns are fixedly connected through the column steel end structures. Column steel connecting bracket 5: Several column steel connecting brackets are arranged horizontally. One end of the column steel connecting bracket is fixed to the outer wall of the steel pipe encasing the column, and the other end is fixedly connected to the external beam. Column connecting steel brackets generally use H-section steel.

[0031] In some embodiments, the precast reinforced concrete frame column further includes a precast independent foundation 6, and a column steel end structure is provided on the top of the precast independent foundation.

[0032] Conventional precast reinforced concrete frame columns are segmented at floor levels and beam bottoms, meaning the beam-column joint area is cast-in-place. However, this joint area experiences maximum bending moment and shear force, and contains a large amount of reinforcing steel, making it difficult to guarantee the quality of on-site casting. The quality of the joint directly affects the safety of the main structure. The precast reinforced concrete frame column proposed in this application, due to the column steel end structure, allows the connection joint between adjacent frame columns to be located in the middle of the floor, particularly at or near the inflection point, where the bending moment is minimal or zero and the shear force is moderate. Furthermore, an annular groove for accommodating the column's outer steel pipe is provided in the middle of the column's reinforcing cage. The column steel end structure is placed within this groove and cast integrally with the frame column body. The external main beam is fixed to the column's outer steel pipe via column steel connecting brackets, thus securing it to the frame column body and forming a stable column-beam connection joint.

[0033] The precast reinforced concrete frame column of this application has the following advantages: First, the setting of the column steel end structure allows the connection nodes between adjacent frame columns to be set only at places with smaller bending moments, thereby reducing the load-bearing capacity requirements of the connection nodes of the frame columns and making the construction of the frame columns more convenient. Only the ends of the column steel cage and the column steel end structure, as well as the column steel end structures between two adjacent frame columns, need to be connected within the frame column, making the node construction simple.

[0034] Secondly, the frame columns contain only a small amount of steel in the joint area, resulting in low steel consumption; low steel consumption is more economical and reduces carbon emissions.

[0035] Third, the beam-column joints and column-column joints of the frame columns are all on the outside, with no basic or hidden works, making it easy to visually inspect, check, and test. The connection quality is very intuitive and easy to operate.

[0036] Example 2 Based on Example 1, two preferred structural forms of column steel end structures are given.

[0037] The first type is suitable for frame columns that do not transmit bending moments or only transmit very small bending moments. The column steel end structure includes a column steel end plate 4-1, which is welded and fixed to the top or bottom of the column steel cage; adjacent frame columns or frame columns and precast column independent foundations are fixedly connected by welding the column steel end plates.

[0038] The second type is suitable for transmitting large bending moments between frame columns. The column steel end structure includes a column steel end plate 4-1, an inner column connecting steel pipe 4-2, and an outer column connecting steel pipe 4-3. The column steel end plate is welded and fixed to the top or bottom of the column reinforcement cage; the inner column connecting steel pipe is sleeved on the outside of the column reinforcement cage, with one end fixedly connected to one side of the column steel end plate, and one end of the outer column connecting steel pipe fixedly connected to the other side of the column steel end plate; a fixed connection is achieved between two adjacent frame columns, or between a frame column and a precast column's independent foundation, by welding the other end of the outer column connecting steel pipe; and grout is injected into the cavity formed by the two column steel end plates and the outer column connecting steel pipe to form a concrete connection node.

[0039] If the segment (the connection between adjacent frame columns) is at the column inflection point (when the bending moment is 0 or very small), the internal and external connecting steel pipes can be omitted, which is the first type of column steel end structure; the frame columns on both sides are directly fixed by welding the column steel end plates around their perimeter. If the segment (the connection between adjacent frame columns) needs to transfer a large bending moment, internal and external connecting steel pipes are installed. The main function of the internal and external connecting steel pipes is to transfer the bending moment.

[0040] In the second type of column end structure, such as Figure 5 As shown, the fixed connection between two adjacent frame columns, or between a frame column and a precast column's independent foundation, is mainly achieved by welding the ends of two external connecting steel pipes (see weld 13 in the figure). One or more overflow holes 14 and one or more post-grouting holes 15 are provided on the upper external connecting steel pipe, and one or more grouting holes 16 are provided on the lower external connecting steel pipe. Grouting is performed inside the external connecting steel pipe through the grouting holes pre-drilled on it, forming a local steel-concrete composite column joint at the butt joint. After the overflow holes on the upper external connecting steel pipe begin to overflow, grouting continues from the post-grouting holes to ensure the uniformity of grouting in the upper external connecting steel pipe.

[0041] When the frame column needs to transmit bending moment, an internal connecting steel pipe and an external connecting steel pipe are set up, and the two external connecting steel pipes form a casting cavity 17. Grout is injected into the casting cavity through the grouting hole 14, the overflow hole 15 and the post grouting hole set on the external connecting steel pipe, so that a local steel pipe concrete column butt joint is formed between the two steel end structures. This structural design can not only improve the bending moment bearing capacity of the frame column, but also avoid wet work and reduce the construction difficulty.

[0042] In the first and second types of column steel end structures, the longitudinal bars of the column steel cage and the column steel end plate are connected by welding. When the diameter of the longitudinal bars of the column steel cage is greater than 20mm, through-hole plug welding is used, and when the diameter is less than 20mm, electroslag pressure welding is used.

[0043] In the above embodiments 1-2, the frame column body is designed conventionally, and the column reinforcement cage consists of longitudinal bars and stirrups. The longitudinal bars at the ends of the column reinforcement cage are welded to the column steel end plate. The length of the frame column body and the connection between adjacent precast column bodies need to be determined by calculation, and are generally set at the inflection point or where the bending moment and shear force are small, generally at 1 / 2 of the story height.

[0044] In the second type of column end structure, multiple second studs 4-4 are fixed at intervals on the upper and lower surfaces of the column end plate, the inner surface of the internal connecting steel pipe, and the inner surface of the external connecting steel pipe.

[0045] Reference Figures 1-11 As shown, this invention provides a framework structure.

[0046] Example 1 Includes precast reinforced concrete frame columns as described above, and several main beams A; according to the design position of the main beams, corresponding column steel connecting brackets are set on the outer wall of the steel pipe encasing the precast reinforced concrete frame columns; the end of the main beam is fixed to the other end of the column steel connecting bracket.

[0047] In embodiment 1, the main beam includes a beam body 7 and an end connection structure 8; The main beam includes a beam reinforcement cage 7-1 and a beam concrete main body 7-2; the end connection structure includes a beam end plate 8-1, an inner beam connecting steel pipe 8-2, and an outer beam connecting component 8-3; the beam end plate is welded and fixed to the end of the beam reinforcement cage and is embedded in the beam concrete main body; the inner beam connecting steel pipe is sleeved on the beam reinforcement cage, and the end of the inner beam connecting steel pipe is fixed to the beam end plate; several sets of through holes are provided at intervals on the inner beam connecting steel pipe, and a tie rod or tie bar 8-4 is installed in each through hole; one end of the outer beam connecting component is fixed to the beam end end plate, and the other end is fixedly connected to the end of the column steel connecting bracket.

[0048] In Embodiment 1, the external beam connection assembly has two structural forms: one is a connection plate 9, and the other is an H-shaped beam connection bracket 10; according to the load-bearing capacity of the beam, two external connection assemblies with corresponding structural forms are set.

[0049] Example 2 Based on Example 1, it also includes a secondary beam B, which has the same structure as the main beam; A beam connecting steel pipe 11 is provided on the main beam body; according to the connection position of the secondary beam on the main beam, an inward annular groove is provided on the beam reinforcement cage, and the beam connecting steel pipe is sleeved on the outside of the annular groove of the beam reinforcement cage; multiple third studs 11-1 are fixed at intervals on the inner wall surface of the beam connecting steel pipe, the beam connecting steel pipe and the second studs are embedded in the beam concrete body, and the outer wall surface of the beam connecting steel pipe is flush with the outer wall surface of the beam concrete body; The beam connecting steel pipe is equipped with beam connecting components 12 in number and position matching the secondary beam, and the external beam connecting components at the ends of the secondary beam are fixedly connected to the beam connecting components.

[0050] In embodiment 2, the beam connection assembly has two structural forms: one is a connection plate 9, and the other is an H-shaped beam connection bracket 10; according to the load-bearing capacity of the beam, two external connection assemblies with corresponding structural forms are set.

[0051] Two types of external beam connection components are set at the ends of the main beams or secondary beams. When the beam is subjected to bending moment, H-shaped beam connecting brackets are used as external beam connection components between beams or between beams and frame columns. When the beam is not subjected to or is subjected to only a very small bending moment, connecting plates are used as external beam connection components between beams or between beams and frame columns. This meets the beam usage requirements under various working conditions and avoids redundancy in beam structure design.

[0052] A beam-connecting steel pipe, integrated with the main beam, is installed in the middle of the main beam. Two types of beam-connecting components are used on the beam-connecting steel pipe. Depending on whether the connection node between the beams bears bending moment, either a connecting plate or an H-shaped beam-connecting bracket is selected as the beam-connecting component. This meets the beam usage requirements under various working conditions. Furthermore, because of the beam-connecting steel pipe and beam-connecting components, the connection nodes of the secondary beams on the main beam are all on the outside, with no basic or hidden works, making it easy to visually inspect, test, and check. The connection quality is very intuitive and easy to operate.

[0053] In the above embodiments 1 and 2, the main beam or secondary beam body includes a beam reinforcement cage and a beam concrete body. The beam reinforcement cage is composed of longitudinal bars, stirrups, and web bars. The ends of the beam reinforcement cage and the beam end plate are connected by welding.

[0054] In the above embodiments, whether it is between the external beam connection components (connecting plates or H-shaped beam connecting brackets) of the main beam and the beam connection components (connecting plates or H-shaped beam connecting brackets) of the secondary beam, or between the external beam connection components (connecting plates or H-shaped beam connecting brackets) of the main beam and the column steel connecting brackets of the frame column, they are all connected by clamping plates 18 and bolt assemblies, or directly welded after clamping plates are installed. As shown in the figure, for the connection between connecting plates, clamping plates are installed on both sides of the connecting plate, and corresponding through holes are opened on the connecting plate and the clamping plates. The bolt assembly passes through the through holes to achieve the fixed connection between the two connecting plates and the two clamping plates. For the connection between the H-shaped beam connecting brackets and the H-shaped column steel connecting brackets, clamping plates are also required on both sides of the top horizontal plate, the middle vertical plate, and the bottom horizontal plate of the H-shaped structure, and corresponding through holes are opened.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A precast reinforced concrete frame column, characterized in that: include The main body of the frame column includes the column reinforcement cage and the column concrete body; The column is encased in a steel pipe. Based on the connection position of the external beam on the main body of the frame column, the column reinforcement cage is provided with an inward annular groove. The column encasing steel pipe is sleeved on the outside of the annular groove of the column reinforcement cage. Multiple first studs are fixed at intervals on the inner wall surface of the encasing steel pipe. The column encasing steel pipe and the first studs are embedded in the column concrete main body. The outer wall surface of the column encasing steel pipe is flush with the outer wall surface of the column concrete main body. The column steel end structure is fixedly connected to both the top and bottom of the column steel cage, and the column steel end structure is embedded in the column concrete body; two adjacent frame columns are fixedly connected by the column steel end structure. The column steel connecting brackets are arranged horizontally. One end of the column steel connecting bracket is fixed to the outer wall of the steel pipe covering the column, and the other end is fixedly connected to the external beam.

2. The precast reinforced concrete frame column according to claim 1, characterized in that: It also includes precast independent column foundations, with a column steel end structure on top of the precast independent column foundation.

3. The precast reinforced concrete frame column according to claim 1 or 2, characterized in that: The column steel end structure includes a column steel end plate, which is welded and fixed to the top or bottom of the column steel cage; the column steel end plates are welded together to achieve a fixed connection between two adjacent frame columns or between a frame column and an independent foundation under a precast column.

4. The precast reinforced concrete frame column according to claim 1 or 2, characterized in that: The column steel end structure includes a column steel end plate, an inner column connecting steel pipe, and an outer column connecting steel pipe. The column steel end plate is welded and fixed to the top or bottom of the column steel cage. The inner column connecting steel pipe is sleeved on the outside of the column steel cage, with one end fixedly connected to one side of the column steel end plate, and one end of the outer column connecting steel pipe fixedly connected to the other side of the column steel end plate. A fixed connection is achieved by welding the other end of the external steel pipe between two adjacent frame columns or between a frame column and an independent foundation under a precast column; and grout is injected into the cavity formed by the steel end plates of the two columns and the external steel pipe to form a concrete connection node.

5. The precast reinforced concrete frame column according to claim 4, characterized in that: Multiple second studs are fixed at intervals on the upper and lower surfaces of the column steel end plate, the inner surface of the internal connecting steel pipe of the column, and the inner surface of the external connecting steel pipe of the column.

6. A frame structure, characterized by: It includes a precast reinforced concrete frame column as described in any one of claims 1-5, and several main beams; according to the design position of the main beams, corresponding column steel connecting brackets are set on the outer wall of the steel pipe encasing the precast reinforced concrete frame column; the end of the main beam is fixed to the other end of the column steel connecting bracket.

7. The frame structure according to claim 6, characterized in that: The main beam includes the beam body and the end connection structure; The main beam includes a beam reinforcement cage and a beam concrete main body; the end connection structure includes a beam end plate, an inner beam connecting steel pipe, and an outer beam connecting component; the beam end plate is welded and fixed to the end of the beam reinforcement cage and is embedded in the beam concrete main body; the inner beam connecting steel pipe is sleeved on the beam reinforcement cage, and the end of the inner beam connecting steel pipe is fixed to the beam end plate; several sets of through holes are provided at intervals on the inner beam connecting steel pipe, and a tie rod or tie bar is installed in each through hole; one end of the outer beam connecting component is fixed to the beam end end plate, and the other end is fixedly connected to the end of the column steel connecting bracket.

8. The frame structure according to claim 7, characterized in that: The external beam connection components have two structural forms: one is a connection plate, and the other is an H-shaped beam connection bracket; the two external connection components with corresponding structural forms are set according to the load-bearing capacity of the beam.

9. The frame structure according to claim 7 or 8, characterized in that: It also includes secondary beams, which have the same structure as the main beams; A beam connecting steel pipe is provided on the main beam body; according to the connection position of the secondary beam on the main beam, an inward annular groove is provided on the beam reinforcement cage, and the beam connecting steel pipe is sleeved on the outside of the annular groove of the beam reinforcement cage; multiple third studs are fixed at intervals on the inner wall surface of the beam connecting steel pipe, the beam connecting steel pipe and the second studs are embedded in the beam concrete body, and the outer wall surface of the beam connecting steel pipe is flush with the outer wall surface of the beam concrete body. The beam connecting steel pipe is equipped with beam connecting components in a number and position that match the secondary beam, and the external beam connecting components at the ends of the secondary beam are fixedly connected to the beam connecting components.

10. The frame structure according to claim 9, characterized in that: The beam connection components have two structural forms: one is a connection plate, and the other is an H-shaped beam connection bracket; the two external connection components with the corresponding structural forms are set according to the load-bearing capacity of the beam.

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