CN107299721A - A kind of precast concrete open tubular column node connecting structure and its construction method - Google Patents

Abstract

The invention discloses a prefabricated concrete hollow column node connection structure and a construction method thereof. The reinforced concrete hollow column is used as the upper prefabricated frame column and the lower layer prefabricated frame column of the prefabricated concrete hollow column node connection structure, which can greatly save the amount of concrete. In order to reduce the self-weight of the structure, and the upper prefabricated frame column and the lower prefabricated frame column can be welded through the bottom end plate and the top end plate to realize rapid assembly and effective transmission of internal force between the upper and lower prefabricated frame columns; and, due to the present invention The connection part of the upper prefabricated frame column and the lower prefabricated frame column is set between the 1/3 story height position and the 2/3 story height position of the floor where the node connection structure is located, so that the connection part is in the frame column under the action of bending moment In a smaller area, the adverse effect of the bending moment on the welding position between the upper prefabricated frame column and the lower prefabricated frame column is reduced, ensuring the safety of the structure.

Description

A prefabricated concrete hollow column joint connection structure and its construction method

technical field

The invention relates to a prefabricated concrete hollow column joint connection structure and a construction method thereof.

Background technique

With the country's vigorous promotion of industrialized buildings, technologies related to prefabricated buildings have developed rapidly. While studying the performance of prefabricated buildings, the research on structural components of prefabricated buildings is also changing with each passing day, among which there are many studies on the form of prefabricated components.

According to the mechanical characteristics of frame columns, prefabricated concrete frame columns mostly use precast concrete solid columns, and rarely use precast concrete hollow columns. Prefabricated concrete pipe piles are commonly used in foundation design, and are designed with full consideration of their main pressure-bearing characteristics in terms of material selection and reinforcement structure. The mechanical characteristics of the frame column are slightly different from those of the pile. In addition to compression, the column also bears the bending moment and shear force caused by the horizontal load transfer, so it is slightly different from the hollow pile in terms of structure and connection.

The use of prefabricated concrete hollow columns can save the amount of concrete and reduce the self-weight of the structure under the premise of meeting the structural force requirements, thereby saving the foundation cost and having certain economic benefits.

Contents of the invention

The technical problem to be solved by the present invention is to provide a prefabricated concrete hollow column joint connection structure and a construction method thereof.

To solve the problems of the technologies described above, the technical scheme adopted in the present invention is as follows:

A prefabricated concrete hollow column node connection structure, which is applied to a prefabricated concrete frame structure, including frame columns and frame beams of a certain floor of the prefabricated concrete frame structure, characterized in that: the frame column is prefabricated by the upper layer Composed of frame columns and lower prefabricated frame columns;

The upper prefabricated frame column and the lower prefabricated frame column are both reinforced concrete hollow columns, and the upper end surface of the reinforced concrete hollow column is provided with a top end plate welded to the upper end of its longitudinal reinforcement, and the lower end surface is provided with a top end plate welded to the lower end of its longitudinal reinforcement. The bottom end plate of the upper prefabricated frame column is seated on the top end plate of the lower prefabricated frame column and welded, and the contact surface between the bottom end plate and the top end plate is located at the node connection structure Between the 1/3 storey height position and the 2/3 storey height position of the floor, the upper end of the upper prefabricated frame column extends into the upper floor of the floor where the node connection structure is located, and the lower prefabricated frame column The lower end of the lower end extends into the next floor of the floor where the node connection structure is located;

The frame beams are connected to the upper prefabricated frame columns.

As a preferred embodiment of the present invention: the frame beam is a horizontal composite beam, and the node connection structure further includes a cast-in-place ring beam, and the horizontal composite beam is prefabricated through the cast-in-place ring beam and the upper layer Frame column connection, that is: the horizontal laminated beam is composed of prefabricated beams, stressed gluten bound on the top surface of the prefabricated beam, and a cast-in-place part poured on the top surface of the prefabricated beam and including the stressed gluten Concrete, the cast-in-place ring beam is a ring-shaped reinforced concrete beam set around the upper prefabricated frame column, and the stressed bottom bar is pierced through the end face of the prefabricated beam and extends to the steel bar of the cast-in-place ring beam Below the skeleton, the stressed gluten extends above the reinforced skeleton of the cast-in-place ring beam, and the concrete of the cast-in-place part of the horizontal composite beam and the concrete of the cast-in-place ring beam are poured simultaneously in a cast-in-place manner, so that the The stress-bearing gluten and the stress-bearing bottom reinforcement are anchored inside the concrete of the cast-in-place ring beam.

As a preferred embodiment of the present invention: the upper prefabricated frame column is provided with a rough surface on its outer wall connected to the cast-in-place ring beam.

As a preferred embodiment of the present invention: the contact surface between the bottom end plate and the top end plate is located at a height of 1/2 of the floor where the node connection structure is located.

As a preferred embodiment of the present invention: the reinforced concrete hollow column has a circular cross section.

As a preferred embodiment of the present invention: both the bottom end plate and the top end plate are annular plates, and the annular plate has the same shape as the cross-section of the reinforced concrete hollow column and has a position corresponding to the The through hole of the longitudinal reinforcement of the reinforced concrete hollow column; the welding between the lower end of the longitudinal reinforcement of the upper prefabricated frame column and its bottom end plate, and the welding between the upper end of the longitudinal reinforcement of the lower prefabricated frame column and its top end plate Both are: the ends of the longitudinal ribs penetrate into the through holes of the corresponding annular plates for plug welding.

As a preferred embodiment of the present invention: the node connection structure further includes at least one frame beam.

A construction method for a precast concrete hollow column node connection structure, characterized in that: the precast concrete hollow column node connection structure is the above node connection structure; the construction method includes:

Step 1, preparing the upper prefabricated frame columns, lower prefabricated frame columns and prefabricated beams;

Step 2. Install the upper prefabricated frame column and the lower prefabricated frame column in place, so that the bottom end plate of the upper prefabricated frame column is seated on the top end plate of the lower prefabricated frame column and welded, and the bottom The contact surface between the end plate and the top end plate is located between the 1/3 storey height and the 2/3 storey height of the floor where the node connection structure is located, and the upper end of the upper prefabricated frame column extends into the node connection structure In the upper floor of the floor where the floor is located, the lower end of the lower prefabricated frame column extends into the next floor of the floor where the node connection structure is located;

Step 3: Install the prefabricated beam in place, bind the stressed gluten on the top surface of the prefabricated beam, and bind the reinforced skeleton of the cast-in-place ring beam around the upper prefabricated frame column, so that the stressed The bottom reinforcement of the force passes through the end face of the prefabricated beam and extends below the steel skeleton of the cast-in-place ring beam, and the stressed gluten extends above the steel skeleton of the cast-in-place ring beam;

Step 4: Use the cast-in-place method to simultaneously pour the cast-in-place concrete of the horizontal composite beam and the concrete of the cast-in-place ring beam, so that the stressed gluten and the stressed bottom bar are anchored to the cast-in-place ring beam. Concrete inside, so as to realize the connection between the horizontal composite beam and the upper prefabricated frame column through the cast-in-place ring beam.

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

First, the present invention uses reinforced concrete hollow columns as the upper prefabricated frame columns and the lower prefabricated frame columns of the prefabricated concrete hollow column node connection structure, which can greatly save the amount of concrete and reduce the weight of the structure, and the upper prefabricated frame columns and the lower prefabricated frame The columns can be welded through the bottom end plate and the top end plate to realize rapid assembly and effective transmission of internal force between the upper and lower prefabricated frame columns;

And, because the present invention arranges the connecting portion of the prefabricated frame column on the upper floor and the prefabricated frame column on the lower floor (that is, the contact surface between the bottom end plate and the top end plate) at the position from 1/3 to 2/3 of the floor where the node connection structure is located. Between the 3 storey heights, the connection part is located in the area where the frame column is less affected by the bending moment, thereby reducing the adverse effect of the bending moment on the welding position between the upper prefabricated frame column and the lower prefabricated frame column, The safety of the structure is guaranteed.

Second, the present invention adopts the cast-in-place method to simultaneously pour the cast-in-place concrete of the horizontal composite beam and the concrete of the cast-in-place ring beam, so that the stressed gluten and the stressed bottom reinforcement of the horizontal composite beam are anchored to the cast-in-place concrete The concrete interior of the ring beam is used to realize the connection between the horizontal laminated beam and the upper precast frame column, which ensures the strength and stiffness of the beam-column connection node area, and ensures the internal force between the horizontal laminated beam and the upper precast frame column It is effectively transmitted to facilitate the realization of the integrity of the framework structure.

Thirdly, the present invention enhances the connection effect between the upper prefabricated frame column and the cast-in-place ring beam by providing a rough surface on the outer wall where the upper prefabricated frame column is connected with the cast-in-place ring beam.

Fourth, in the present invention, the contact surface between the bottom end plate and the top end plate is located at the 1/2 storey height of the floor where the node connection structure is located, so that the connection position between the upper prefabricated frame column and the lower prefabricated frame column is located at the position of the frame column. The inflection point subject to the bending moment, in order to minimize the adverse effect of the bending moment on the welding position between the upper prefabricated frame column and the lower prefabricated frame column.

Fifth, the construction method of the precast concrete hollow column node connection structure of the present invention has the advantages of convenient and fast construction.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

Fig. 1 is the structural representation of the prefabricated concrete hollow column joint connection structure of the present invention;

Fig. 2 is A-A sectional view of Fig. 1;

FIG. 3 is a schematic diagram of the bottom end plate 11 and the top end plate 21 of the present invention.

detailed description

As shown in Figures 1 to 3, the present invention discloses a prefabricated concrete hollow column node connection structure, which is applied to a prefabricated concrete frame structure, including frame columns and frame beams of a certain floor of the prefabricated concrete frame structure, The inventive concept is: the frame column is composed of an upper prefabricated frame column 1 and a lower prefabricated frame column 2 . The upper prefabricated frame column 1 and the lower prefabricated frame column 2 are both reinforced concrete hollow columns, and the upper end surface of the reinforced concrete hollow column is provided with a top end plate welded to the upper end of its longitudinal reinforcement, and the lower end surface is provided with a top end plate welded to the lower end of its longitudinal reinforcement. The bottom end plate 11 of the upper prefabricated frame column 1 is seated on the top end plate 21 of the lower prefabricated frame column 2 and connected by welding, and the contact surface between the bottom end plate 11 and the top end plate 21 is located in the node connection structure Between the 1/3 floor height and the 2/3 floor height of the floor, the upper end of the upper prefabricated frame column 1 extends into the upper floor of the floor where the node connection structure is located, and the lower end of the lower prefabricated frame column 2 extends In the next floor of the floor where the entry node connects the structure; the frame beam is connected with the prefabricated frame column 1 on the upper floor.

Therefore, the present invention uses reinforced concrete hollow columns as the upper prefabricated frame column 1 and the lower prefabricated frame column 2 of the prefabricated concrete hollow column node connection structure, which can greatly save the amount of concrete and reduce the weight of the structure, and the upper prefabricated frame column 1 and the lower layer The prefabricated frame columns 2 can be welded by the bottom end plate 11 and the top end plate 21 to realize rapid assembly and effective transmission of internal force between the upper and lower prefabricated frame columns; The connection part of the frame column 2 (that is, the contact surface between the bottom end plate 11 and the top end plate 21) is set between the 1/3 story height and the 2/3 story height of the floor where the node connection structure is located, so that the connection part is at In the area where the frame column is less subjected to the bending moment, the adverse effect of the bending moment on the welding position between the upper prefabricated frame column 1 and the lower prefabricated frame column 2 is reduced, and the safety of the structure is ensured.

On the basis of above-mentioned inventive idea, the present invention adopts following preferred structure:

As a preferred embodiment of the present invention: the frame beam is a horizontal composite beam 3, and the joint connection structure also includes a cast-in-place ring beam 4, and the horizontal composite beam 3 is connected to the upper prefabricated frame column 1 through the cast-in-place ring beam 4, that is: horizontal The composite beam 3 is composed of a prefabricated beam 31, a stressed gluten 32 bound on the top surface of the prefabricated beam 31, and a part of cast-in-place concrete 33 poured on the top surface of the prefabricated beam 31 and including the stressed gluten 32. The cast-in-place ring beam 4 It is an annular reinforced concrete beam set around the prefabricated frame column 1 on the upper floor. The stressed bottom reinforcement 311 passes through the end face of the prefabricated beam 31 and extends below the steel skeleton 41 of the cast-in-place ring beam 4, and the stressed gluten 32 extends to the cast-in-place ring Above the steel skeleton 41 of the beam 4, the cast-in-place concrete 33 of the horizontal composite beam 3 and the concrete 42 of the cast-in-place ring beam 4 are poured at the same time, so that the stressed gluten bars 32 and the stressed bottom bars 311 are anchored in the cast-in-place The interior of the concrete 42 of the ring beam 4; in addition, the length of the stressed gluten bar 32 and the stressed bottom bar 311 extending into the cast-in-place ring beam 4 should meet the anchorage length specified in the specification.

Thereby, the present invention adopts the cast-in-place method to simultaneously pour the cast-in-place concrete 33 of the horizontal composite beam 3 and the concrete 42 of the cast-in-place ring beam 4, so that the stressed gluten 32 and the stressed bottom bar 311 of the horizontal composite beam 3 are anchored in the The inside of the concrete 42 of the cast-in-place ring beam 4 is used to realize the connection between the horizontal laminated beam 3 and the prefabricated frame column 1 on the upper floor, which ensures the strength and stiffness of the beam-column connection node area, and ensures the connection between the horizontal laminated beam 3 and the upper floor. The internal force between the prefabricated frame columns 1 is effectively transmitted to facilitate the realization of the integrity of the frame structure.

As a preferred embodiment of the present invention: the upper prefabricated frame column 1 is provided with a rough surface on its outer wall connected to the cast-in-place ring beam 4 to enhance the connection effect between the upper prefabricated frame column 1 and the cast-in-place ring beam 4 .

As a preferred embodiment of the present invention: the contact surface between the bottom end plate 11 and the top end plate 21 is located at 1/2 of the floor height of the floor where the node connection structure is located. Therefore, the connecting part of the upper prefabricated frame column 1 and the lower prefabricated frame column 2 is at the inflection point of the bending moment of the frame column, so as to minimize the impact of the bending moment on the connection between the upper prefabricated frame column 1 and the lower prefabricated frame column 2. The adverse effect of the welding part between.

As a preferred embodiment of the present invention: the reinforced concrete hollow column has a circular cross section.

As a preferred embodiment of the present invention: the bottom end plate 11 and the top end plate 21 are all annular plates, and the annular plate has the same shape as the cross section of the reinforced concrete hollow column and is provided with a position corresponding to the reinforced concrete hollow column. The through hole of the longitudinal reinforcement; the welding between the lower end of the longitudinal reinforcement 12 of the upper prefabricated frame column 1 and its bottom end plate 11, and the welding between the upper end of the longitudinal reinforcement 22 of the lower prefabricated frame column 2 and its top end plate 21 are: The ends of the longitudinal ribs are inserted into the through holes of the corresponding annular plates for plug welding.

As a preferred embodiment of the present invention: the node connection structure further includes at least one frame beam.

The invention also discloses a construction method for the above-mentioned prefabricated concrete hollow column node connection structure, including:

Step 1, preparing the upper prefabricated frame column 1, the lower prefabricated frame column 2 and the prefabricated beam 31;

Step 2: Install the upper prefabricated frame column 1 and the lower prefabricated frame column 2 in place so that the bottom end plate 11 of the upper prefabricated frame column 1 is seated on the top end plate 21 of the lower prefabricated frame column 2 and connected by welding, and the bottom The contact surface between the end plate 11 and the top end plate 21 is located between the 1/3 floor height and the 2/3 floor height of the floor where the node connection structure is located, and the upper end of the upper prefabricated frame column 1 extends into the floor where the node connection structure is located. In the upper floor, the lower end of the lower prefabricated frame column 2 extends into the next floor of the floor where the node connection structure is located;

Step 3: Install the prefabricated beam 31 in place, and bind the stressed gluten 32 on the top surface of the prefabricated beam 31, and bind the reinforcement skeleton 41 of the cast-in-place ring beam 4 set around the upper prefabricated frame column 1, so that the stressed bottom reinforcement 311 Go out from the end face of the prefabricated beam 31 and extend below the steel frame 41 of the cast-in-place ring beam 4, and the stressed gluten 32 extends above the steel frame 41 of the cast-in-place ring beam 4;

Step 4: Use the cast-in-place method to simultaneously pour the cast-in-place concrete 33 of the horizontal composite beam 3 and the concrete 42 of the cast-in-place ring beam 4, so that the stressed gluten 32 and the stressed bottom bar 311 are anchored to the concrete of the cast-in-place ring beam 4 42 to realize the connection between the horizontal composite beam 3 and the upper prefabricated frame column 1 through the cast-in-place ring beam 4.

The present invention is not limited to the above-mentioned specific implementation methods. According to the above-mentioned content, according to the common technical knowledge and conventional means in this field, without departing from the above-mentioned basic technical idea of the present invention, the present invention can also make other equivalent forms. Amendments, substitutions or alterations all fall within the protection scope of the present invention.

Claims (8)

1. A prefabricated concrete hollow column joint connection structure, which is applied to a prefabricated concrete frame structure, including a frame column and a frame beam of a certain floor of the prefabricated concrete frame structure, is characterized in that: the frame column is composed of The upper prefabricated frame column (1) and the lower prefabricated frame column (2); The upper prefabricated frame column (1) and the lower prefabricated frame column (2) are both reinforced concrete hollow columns, and the upper end surface of the reinforced concrete hollow column is provided with a top end plate welded to the upper end of its longitudinal reinforcement, and the lower end surface is provided with The bottom end plate welded to the lower end of the longitudinal reinforcement, the bottom end plate (11) of the upper prefabricated frame column (1) is seated on the top end plate (21) of the lower prefabricated frame column (2) and welded, And the contact surface between the bottom end plate (11) and the top end plate (21) is located between the 1/3 storey height position and the 2/3 storey height position of the floor where the node connection structure is located, and the upper prefabricated frame column ( The upper end of 1) extends into the upper floor of the floor where the node connection structure is located, and the lower end of the lower prefabricated frame column (2) extends into the next floor of the floor where the node connection structure is located; The frame beam is connected with the upper prefabricated frame column (1). 2. The node connection structure according to claim 1, characterized in that: the frame beam is a horizontal composite beam (3), and the node connection structure further includes a cast-in-place ring beam (4), and the horizontal The composite beam (3) is connected with the upper prefabricated frame column (1) through the cast-in-place ring beam (4), namely: the horizontal composite beam (3) is bound on the The stressed gluten (32) on the top surface of the prefabricated beam (31) and the cast-in-place part concrete (33) that is poured on the top surface of the prefabricated beam (31) and includes the stressed gluten (32) constitutes, the The cast-in-place ring beam (4) is a ring-shaped reinforced concrete beam arranged around the upper prefabricated frame column (1), and the stressed bottom reinforcement (311) passes through the end face of the prefabricated beam (31) and extends to the Below the reinforcement skeleton (41) of the cast-in-place ring beam (4), the stressed gluten (32) extends above the reinforcement skeleton (41) of the cast-in-place ring beam (4), and the horizontal composite beam ( 3) The cast-in-place concrete (33) and the concrete (42) of the cast-in-place ring beam (4) are poured simultaneously in a cast-in-place manner, so that the stressed gluten (32) and the stressed bottom bar (311) are anchored Inside the concrete (42) of the cast-in-place ring beam (4). 3. The node connection structure according to claim 2, characterized in that: the upper prefabricated frame column (1) is provided with a rough surface on its outer wall connected to the cast-in-place ring beam (4). 4. The node connection structure according to any one of claims 1 to 3, characterized in that: the contact surface between the bottom end plate (11) and the top end plate (21) is located on the 1st floor of the floor where the node connection structure is located. / 2 storey high position. 5. The node connection structure according to any one of claims 1 to 3, characterized in that: the reinforced concrete hollow column has a circular cross section. 6. The node connection structure according to any one of claims 1 to 3, characterized in that: the bottom end plate (11) and the top end plate (21) are both annular plates, and the annular plates have The cross section of the reinforced concrete hollow column has the same shape and is provided with a through hole corresponding to the longitudinal reinforcement of the reinforced concrete hollow column; the lower end of the longitudinal reinforcement (12) of the upper prefabricated frame column (1) and its bottom The welding between the end plates (11) and the welding between the upper end of the longitudinal rib (22) of the lower prefabricated frame column (2) and its top end plate (21) are all: the end of the longitudinal rib penetrates into the Plug welding is performed in the through hole of the corresponding annular plate. 7. The node connection structure according to any one of claims 1 to 3, characterized in that: the node connection structure further comprises at least one frame beam. 8. A construction method for a precast concrete hollow column node connection structure, characterized in that: the precast concrete hollow column node connection structure is the node connection structure described in claim 2 or 3; the construction method comprises: Step 1, preparing the upper prefabricated frame column (1), the lower prefabricated frame column (2) and the prefabricated beam (31); Step 2, installing the upper prefabricated frame column (1) and the lower prefabricated frame column (2) in place so that the bottom end plate (11) of the upper prefabricated frame column (1) is located on the lower prefabricated frame column (2) on the top end plate (21) and welded connection, and the contact surface of the bottom end plate (11) and the top end plate (21) is located at the 1/3 floor height of the floor where the node connection structure is located to 2 / Between the 3 storey height positions, the upper end of the upper prefabricated frame column (1) extends into the upper floor of the floor where the node connection structure is located, and the lower end of the lower prefabricated frame column (2) extends into In the next floor of the floor where the node connection structure is located; Step 3, install the prefabricated beam (31) in place, bind the stressed gluten (32) on the top surface of the prefabricated beam (31), and bind the upper prefabricated frame column (1) around the The reinforced skeleton (41) of the cast-in-place ring beam (4), so that the stressed bottom reinforcement (311) passes through the end face of the prefabricated beam (31) and extends to the steel bar of the cast-in-place ring beam (4) Below the skeleton (41), the stressed gluten (32) extends above the reinforcement skeleton (41) of the cast-in-place ring beam (4); Step 4, using the cast-in-place method to simultaneously pour the cast-in-place concrete (33) of the horizontal composite beam (3) and the concrete (42) of the cast-in-place ring beam (4), so that the stressed gluten (32) ) and the stressed bottom bar (311) are anchored inside the concrete (42) of the cast-in-place ring beam (4), so as to realize that the horizontal composite beam (3) passes through the cast-in-place ring beam (4) and the The connection of the above-mentioned upper layer prefabricated frame column (1).