A prefabricated concrete composite column and a connecting structure thereof

Abstract

The utility model discloses a kind of quick assembly prefabricated concrete composite column and its connecting structure, the quick assembly prefabricated concrete composite column is composed of prefabricated concrete outer tube and concrete cast in situ in prefabricated concrete outer tube, the concrete in prefabricated concrete outer tube is column core, the prefabricated concrete outer tube is made in factory binding longitudinal reinforcement and stirrup and pouring concrete, the longitudinal reinforcement protrudes the upper end of the prefabricated concrete outer tube and is bent for passing through beam-column joint area again and is anchored into the column core of upper layer quick assembly prefabricated concrete composite column upwards.The longitudinal reinforcement of the utility model composite column outer tube portion is bent and anchored into upper layer prefabricated column through joint area, improve joint rigidity, can realize quick installation, reduce the manufacturing and installation difficulty of prefabricated column, high degree of standardization, construction fault tolerance is low, improve the stability and connecting strength of structure, improve seismic performance.

Description

Technical Field

[0001] This utility model relates to a rapid assembly precast concrete composite column, and also to the connection structure of the rapid assembly precast concrete composite column. Background Technology

[0002] In prefabricated concrete structures, the reliability of precast column connections directly affects the overall seismic performance and construction efficiency. Currently, the mainstream precast column connection technologies mainly employ two methods: sleeve grouting connection and grout-anchored lap joint. Sleeve grouting connection involves pre-embedding metal sleeves at the ends of the precast columns, and then connecting the reinforcing bars by injecting high-strength mortar during on-site installation. The sleeves are threaded or have grooves to enhance anchorage; typical examples are semi-grouting sleeves and fully grouting sleeves. This connection method has the following drawbacks: 1) Incomplete grouting, requiring specialized testing equipment, and high quality control costs; 2) Low construction tolerance, with on-site hoisting deviations easily leading to misalignment between the sleeve and reinforcing bars, requiring secondary correction; 3) The components themselves are heavy, posing significant challenges to hoisting and transportation, limiting their application in high-rise buildings. Grouting and anchoring mainly involves inserting steel bars into pre-reserved ducts in precast columns and injecting cement-based grout. The force is transmitted by the bond between the steel bars and the grout and the mechanical interlocking force of the inner wall of the duct. The defects of this connection method are: 1) significant stress concentration in the grouting and anchoring area, which limits the seismic performance; 2) when the helical stirrups are insufficient, the duct forming accuracy is required to be high.

[0003] In addition, existing projects are still produced in non-standard sizes, requiring customized production, which results in mold waste, increased costs, and low standardization. Utility Model Content

[0004] The first objective of this invention is to provide a rapid-assembly precast concrete composite column that can improve the stiffness of the joint area, strengthen the overall connection, simplify the construction process, ensure construction quality, save costs, improve construction efficiency, and increase the degree of industrialization.

[0005] The first objective of this utility model is achieved through the following technical measures: a rapid-assembly precast concrete composite column, characterized in that it consists of a precast concrete outer tube and concrete cast in place inside the precast concrete outer tube, the concrete inside the precast concrete outer tube being the column core, the precast concrete outer tube being made by binding longitudinal bars and stirrups and pouring concrete in the factory, the longitudinal bars extending out of the upper end of the precast concrete outer tube and bent to pass through the beam-column joint area and then anchor upward into the column core of the upper rapid-assembly precast concrete composite column.

[0006] The longitudinal steel bars of the outer tube of the composite column of this utility model are bent and anchored into the upper precast column through the node area, which improves the node stiffness, enables rapid installation, reduces the difficulty of manufacturing and installing precast columns, has a high degree of standardization, low construction error rate, improves the stability and connection strength of the structure, and improves seismic performance.

[0007] The longitudinal steel bars of the outer tube of the composite column of this utility model pass through the beam-column joint area and are anchored into the upper precast column, which improves the joint stiffness, enables rapid installation, reduces the difficulty of manufacturing and installing precast columns, has a high degree of standardization, low construction error rate, improves the stability and connection strength of the overall structure, and also improves the seismic performance.

[0008] This utility model relates to a quick-assembly precast concrete composite column that connects to the foundation. The longitudinal reinforcement inside extends out of the lower end of the precast concrete outer tube and is used to anchor into the pre-embedded steel pipe in the foundation.

[0009] The portion of the longitudinal reinforcement extending into the core of the upper-layer quick-assembly precast concrete composite column of this utility model is a vertical steel bar.

[0010] The second objective of this utility model is to provide a connection structure for the aforementioned rapid assembly precast concrete composite column.

[0011] The second objective of this utility model is achieved through the following technical measures: a connection structure for the aforementioned rapid assembly precast concrete composite column, characterized in that it includes a rapid assembly precast concrete composite column and a structural beam, wherein the rapid assembly precast concrete composite column is an upper column and a lower column, and the upper column, the lower column and the structural beam are located in a beam-column joint area, wherein the column cores of the upper column and the lower column and the beam-column joint area are cast in one go on site, and the longitudinal steel bars extending from the upper end of the lower column are bent and pass through the beam-column joint area and anchored upward into the column core of the upper column to form a rigid joint.

[0012] The lower end of the upper column of this utility model is provided with a grouting layer between it and the structural beam.

[0013] The cross-section of the beam-column joint area described in this invention is greater than or equal to the cross-section of the upper and lower columns.

[0014] The rapid assembly precast concrete composite column of this utility model is a bottom column. The longitudinal steel bars of the bottom column pass downward through the grouting layer and are inserted into the pre-embedded steel pipe in the foundation and anchored by grouting.

[0015] The structural beam described in this utility model is a cast-in-place beam or a precast composite beam.

[0016] The longitudinal reinforcing bars of this invention that extend into the beam-column joint area and the upper column are anchored reinforcing bars, and a second stirrup is tied to the anchored reinforcing bars.

[0017] The rapid assembly precast concrete composite column of this utility model is the top-level column, and the longitudinal steel bars of the top-level column extend vertically upward into the beam-column joint area and are bent and anchored.

[0018] Compared with the prior art, the present invention has the following significant advantages:

[0019] (1) In this utility model, the longitudinal reinforcement of the lower precast composite column is extended and bent, and then anchored into the upper precast concrete composite column through the node area to form a continuous force path, which improves the stiffness of the node area and strengthens the overall connection of the structure.

[0020] (2) The precast concrete composite column of this utility model adopts a two-stage construction. The first stage is the precast outer tube, which is manufactured in the prefabrication plant. This allows for large-scale production and manufacturing, and improves the degree of industrialization. The second stage is the on-site construction. Since the precast outer tube is precast in the factory, when used in high-rise buildings, only the precast outer tube needs to be hoisted, which can reduce the self-weight and reduce the impact on the selection of hoisting equipment.

[0021] (3) The prefabricated outer tube of this utility model can provide lateral restraint for the cast-in-place concrete in the central hole.

[0022] (4) This utility model reduces the installation difficulty by connecting the longitudinal ribs of the prefabricated outer pipe, eliminating the need for sleeve grouting connection and reducing sleeve costs; the connection method of this utility model simplifies the construction process, making on-site installation more convenient, quality easier to guarantee, and cost-saving.

[0023] (5) The precast concrete part of the precast composite column of this utility model can be used as the outer concrete formwork, which saves a lot of work on on-site formwork and support. In addition, the installation speed of precast components is relatively fast, which can shorten the construction cycle and improve construction efficiency. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a plan view of Embodiment 1 of this utility model.

[0026] Figure 2 This is one of the longitudinal cross-sectional schematic diagrams of Embodiment 1 of this utility model;

[0027] Figure 3 This is the second longitudinal cross-sectional schematic diagram of Embodiment 1 of this utility model;

[0028] Figure 4 This is a longitudinal cross-sectional schematic diagram of Embodiment 2 of this utility model;

[0029] Figure 5 This is a longitudinal cross-sectional schematic diagram of Embodiment 3 of this utility model.

[0030] In the diagram: 1-Upper column, 2-Lower column, 3-Structural beam, 4-Beam-column joint area, 5-Precast concrete outer tube, 6-Column core, 7-Longitudinal reinforcement, 8-First stirrup, 9-Groove layer, 10-Anchored reinforcement, 11-Second stirrup, 12-Foundation, 13-Bottom column, 14-Embedded steel pipe, 15-Groove, 16-Top column. Detailed Implementation

[0031] Example 1

[0032] like Figures 1-3 As shown, this utility model discloses a rapid-assembly precast concrete composite column, which consists of a precast concrete outer tube 5 and cast-in-place concrete inside the precast concrete outer tube 5. The precast concrete outer tube 5 has a circular cross-sectional shape, and the concrete inside the precast concrete outer tube 5 is called the column core 6. The precast concrete outer tube 5 is manufactured in a factory by binding longitudinal steel bars 7 and first stirrups 8 and then pouring concrete. There are multiple longitudinal steel bars 7 distributed along the circumference, and multiple first stirrups 8 arranged side by side along the height direction. The first stirrups 8 pass around the outside of the longitudinal steel bars 7 and are tied together with the longitudinal steel bars 7. The longitudinal steel bars 7 extend beyond the upper end of the precast concrete outer tube 5 and are bent to pass through the beam-column joint area 4 and then anchor upward into the column core 6 of the upper rapid-assembly precast concrete composite column. The part of the longitudinal steel bars 7 that extends into the column core 6 of the upper rapid-assembly precast concrete composite column is a vertical steel bar.

[0033] A connection structure for the aforementioned rapid-assembly precast concrete composite column, in this embodiment, is an intermediate layer structure assembly. The connection structure includes a rapid-assembly precast concrete composite column and a structural beam 3. The rapid-assembly precast concrete composite column consists of an upper column 1 and a lower column 2. The structural beam 3 is a cast-in-place beam or a precast composite beam. A beam-column joint area 4 is located between the upper column 1, the lower column 2, and the structural beam 3. The column core 6 of the upper column 1 and the lower column 2, as well as the beam-column joint area 4, are cast in one go on site. The longitudinal steel bar 7 extending from the upper end of the lower column 2 is bent and passes through the beam-column joint area 4, and is vertically anchored upward into the column core 6 of the upper column 1 to form a rigid joint. The anchorage depth of the longitudinal steel bar 7 in the upper column 1 meets the anchorage requirements.

[0034] The cross-section of beam-column joint area 4 can be greater than or equal to the cross-section of upper column 1 and lower column 2.

[0035] A grouting layer 9 is provided between the lower end of the upper column 1 and the structural beam 3.

[0036] The longitudinal reinforcement extending into the beam-column joint area 4 and the upper column 1 is anchored reinforcement 10. Second stirrups 11 are tied to the anchored reinforcement 10. There are multiple second stirrups 11 arranged in parallel along the height direction.

[0037] The structural design and load-bearing principle of this utility model are as follows: Precast concrete outer tubes are standardized and manufactured in a factory. On-site, concrete is poured at the core central hole to form a composite column. This design balances the precision of the precast components with the integrity of the cast-in-place portion, avoiding the complex procedures of traditional sleeve connections and enabling rapid construction. The extended ends of the longitudinal reinforcing bars of the lower column are inserted into the central hole of the upper column, achieving continuous load-bearing through cast-in-place concrete. The longitudinal reinforcing bars are bent and anchored into the beam-column joint area, extending upwards to the central hole of the upper column to form a rigid joint, enhancing bending and shear resistance. The continuous arrangement of the reinforcing bars avoids joint weakening, conforming to the seismic principle of "strong joints, weak components." This utility model solves the problems of precision control, strength assurance, and construction efficiency in precast column connections by using the precast outer tube longitudinal reinforcing bar bending and extension anchoring technology, while also considering the seismic resistance and adaptability of the structure, making it suitable for industrialized prefabricated building systems.

[0038] Example 2

[0039] like Figure 4 As shown, this embodiment is a bottom structure assembly. The quick-assembly precast concrete composite column is the bottom column 13. Steel pipes 14 are pre-embedded in the foundation 12. The longitudinal steel bars 7 of the bottom column 13 pass downward through the grouting layer 9 and are inserted into the pre-embedded steel pipes 14 and anchored by grouting material 15.

[0040] Example 3

[0041] like Figure 5 As shown, this embodiment is a top-level structure assembly. The precast concrete composite column to be assembled quickly is the top-level column 16. The longitudinal steel bars 7 of the top-level column 16 extend vertically upward into the beam-column joint area 4 and are bent and anchored.

[0042] The embodiments of this utility model are not limited thereto. Based on the above content of this utility model, and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, this utility model can also be modified, replaced or changed in various other forms, all of which fall within the scope of protection of this utility model.

Claims

1. A rapid-assembly precast concrete composite column, characterized in that: It consists of a precast concrete outer tube and cast-in-place concrete inside the precast concrete outer tube. The concrete inside the precast concrete outer tube is called the column core. The precast concrete outer tube is made by binding longitudinal steel bars and the first stirrup in the factory and pouring concrete. The longitudinal steel bars extend out of the upper end of the precast concrete outer tube and are bent to pass through the beam-column joint area and then anchor upward into the column core of the upper-level rapid-assembly precast concrete composite column.

2. The rapid assembly precast concrete composite column according to claim 1, characterized in that: The rapid-assembly precast concrete composite column is connected to the foundation, and the longitudinal steel bars inside extend from the lower end of the precast concrete outer tube to be anchored into the pre-embedded steel pipe in the foundation.

3. The rapid assembly precast concrete composite column according to claim 2, characterized in that: The portion of the longitudinal reinforcing bars that extends into the core of the upper-layer rapid-assembly precast concrete composite column is a vertical reinforcing bar.

4. A connection structure for a rapidly assembled precast concrete composite column as described in any one of claims 1 to 3, characterized in that: It includes rapidly assembled precast concrete composite columns and structural beams. The rapidly assembled precast concrete composite columns are upper and lower columns. The upper column, lower column and structural beam are connected to a beam-column joint area. The column cores of the upper and lower columns and the beam-column joint area are cast on site in one go. The longitudinal steel bars extending from the upper end of the lower column are bent and pass through the beam-column joint area and anchored upward into the column core of the upper column to form a rigid joint.

5. The connection structure according to claim 4, characterized in that: The longitudinal reinforcement extending into the beam-column joint area and the upper column is anchored reinforcement, and a second stirrup is tied to the anchored reinforcement.

6. The connection structure according to claim 5, characterized in that: A grouting layer is provided between the lower end of the upper column and the structural beam.

7. The connection structure according to claim 6, characterized in that: The cross-section of the beam-column joint area is greater than or equal to the cross-section of the upper column and the lower column.

8. The connection structure according to claim 4, characterized in that: The rapidly assembled precast concrete composite column is the bottom column. The longitudinal steel bars of the bottom column pass downward through the grouting layer and are inserted into the pre-embedded steel pipe in the foundation and anchored by grouting.

9. The connection structure according to claim 4, characterized in that: The rapidly assembled precast concrete composite column is the top-level column, and the longitudinal steel bars of the top-level column extend vertically upward into the beam-column joint area and are bent and anchored.

10. The connection structure according to claim 4, characterized in that: The structural beams are either cast-in-place beams or precast composite beams.

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