Prefabricated concrete assembly type beam-column cast steel joint

Abstract

The application discloses a prefabricated concrete assembly type beam-column cast steel joint and belongs to the field of structural engineering. The prefabricated concrete beam-column is connected through a slotted cast steel component, steel bars and a shear-resistant component filling the slot. The prefabricated concrete beam and column are provided with slots in advance, and the top end of the prefabricated concrete column is provided with a grouting hole. The slotted cast steel component comprises a sleeve and a slot, the slot is connected with the shear-resistant component, the longitudinal steel bars in the beam are connected with the longitudinal steel bars in the column through the sleeve, and the concrete is injected into the slot through the grouting hole to fill the gap. The application can improve the integrity of the beam-column joint and the connecting strength. The prefabricated concrete beam-column is embedded with the cast steel component and filled with the shear-resistant component, the concrete is injected after the connection, the prefabricated and cast-in-place are combined, the joint has good integrity, the embedded cast steel component and the filled shear-resistant component improve the capacity of the joint to bear the bending moment and shear force, and the construction is convenient.

Description

Technical Field

[0001] This invention belongs to the field of structural engineering and relates to a steel reinforcement surface connection node applied to prefabricated assembled beams and columns. Background Technology

[0002] In current technologies, with social development and innovation in the traditional construction industry, there is a shift from cast-in-place concrete construction to prefabricated assembly structures, and this trend is gaining increasing importance. This is because prefabricated components are processed in factories, significantly reducing construction time and accelerating project progress. It also reduces on-site work difficulty, decreases the number of employees, improves the construction environment, reduces dust pollution, and promotes green construction. Furthermore, it fully utilizes structural performance and improves material utilization. Ultimately, it effectively meets the requirements of green building development and achieves the construction industry's energy conservation and emission reduction goals.

[0003] Prefabricated wall columns are manufactured in the factory and transported to the construction site for connection. The biggest problem with the connection of prefabricated wall columns is that the joints are the weakest links. The joints connect the two load-bearing systems of beams and columns, and are crucial for load-bearing and seismic resistance. The joints bear the weight of the structure itself and external forces, so they mainly bear bending moments and shear forces. Ordinary joints have poor energy dissipation effects, resulting in weak seismic performance. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide a precast concrete assembled beam-column cast steel joint, which can improve the bending and shear resistance of the joint, improve the overall seismic performance, and enhance the integrity of the beam-column and joint.

[0005] Technical solution: The present invention provides an application of precast concrete assembled beam-column cast steel joint, comprising a precast concrete beam,

[0006] A concrete groove is formed on one end face of the precast concrete beam, and a grooved cast steel component is embedded in the concrete groove.

[0007] A precast concrete column is installed at one end of the precast concrete beam, on the side facing the grooved cast steel component;

[0008] The precast concrete beams and precast concrete columns are connected by grooved cast steel members, shear members, longitudinal reinforcement of the precast concrete beams, longitudinal reinforcement of the precast concrete columns, short longitudinal reinforcement, and high-strength concrete filling.

[0009] A groove is provided on the precast concrete column near the grooved cast steel component, and at least two pre-reserved grouting holes with connecting grooves are provided at the top of the precast concrete column.

[0010] An injection sleeve is installed on the precast concrete column at the end away from the grooved cast steel component.

[0011] Two rows of at least eight connecting sleeves are installed on the grooved cast steel component.

[0012] The longitudinal reinforcing bars of the precast concrete beam and the longitudinal reinforcing bars of the precast concrete column are welded into the connecting sleeve.

[0013] A perforated groove is also provided at the center of the grooved cast steel component.

[0014] At least four groove holes are evenly distributed at the center of the perforated groove.

[0015] High-strength concrete is poured into the perforated groove of the slotted cast steel component, and after the concrete has cured, it forms a shear-resistant component.

[0016] The precast concrete column is also provided with two rows of at least four steel bar holes. Short longitudinal steel bars are inserted into both rows of steel bar holes. One end of the short longitudinal steel bar is connected to the glue injection sleeve, and the other end passes through the groove hole and is then fixed to the grooved cast steel component by the installed nut.

[0017] High-strength concrete is also injected into the groove through the reserved grouting holes;

[0018] The grooved cast steel component is made of cast steel.

[0019] Beneficial effects: Compared with the prior art, the present invention has the following characteristics: 1. Combination of prefabrication and cast-in-place; 2. Simple operation; 3. Shortened construction period; 4. Improved bending and shear resistance and seismic performance of prefabricated beam-column connection nodes; 5. Improved integrity of the nodes. Attached Figure Description

[0020] Figure 1 This is a cross-sectional schematic diagram of the node structure in this invention;

[0021] Figure 2 This is a cross-sectional schematic diagram of the precast concrete column in this invention;

[0022] Figure 3 This is a cross-sectional view of the precast concrete beams and cast steel components in this invention;

[0023] Figure 4 This is a front view of the cast steel component in this invention;

[0024] Figure 5 This is a left view of the cast steel component in this invention;

[0025] In the diagram: 1. Precast concrete beam;

[0026] 2. Precast concrete column, 201. Glue injection sleeve, 202. Reserved grouting hole, 203. Groove, 204. Rebar hole;

[0027] 3. Grooved cast steel components, 301. Groove with holes, 302. Inner hole of the groove, 303. Connecting sleeve;

[0028] 4. Shear-resistant members; 5. Longitudinal reinforcement of precast concrete beams; 6. Longitudinal reinforcement of precast concrete columns; 7. Short longitudinal reinforcement; 8. High-strength concrete filling; 9. Nuts. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] As shown in the figure, the present invention provides a precast concrete precast beam-column cast steel joint, which includes a precast concrete beam 1, a precast concrete column 2, a grooved cast steel component 3, a shear-resistant component 4, longitudinal reinforcement of the precast concrete beam 5, longitudinal reinforcement of the precast concrete column 6, short longitudinal reinforcement 7, high-strength concrete filling 8, and nuts 9.

[0031] The precast concrete beam 1 is a factory-precast concrete component;

[0032] A grooved cast steel component 3 is embedded in the end face section of the precast concrete beam 1;

[0033] The grooved cast steel component 3 with a hole 301, an inner hole 302, and a connecting sleeve 303 is embedded into the cross section of the precast concrete beam 1.

[0034] The precast concrete beam 1 contains longitudinal reinforcing bars 5.

[0035] The precast concrete column 2 contains longitudinal reinforcing bars 6.

[0036] It also includes precast concrete columns 2, which are factory-precast concrete components.

[0037] A hexagonal groove 203 is provided on the precast concrete column 2, and an injection sleeve 201 is pre-embedded on the other side of the groove so as to connect with the installed short longitudinal steel bar 7.

[0038] Two rows of at least four steel bar holes 204 are also provided in the precast concrete column 2. Short longitudinal steel bars 7 are inserted in both rows of steel bar holes 204. One end of the short longitudinal steel bar 7 is connected to the glue injection sleeve 201, and the other end passes through the slotted hole 302 and is then fixed to the slotted cast steel component 3 by the installed nut 9.

[0039] At least two reserved grouting holes 202 are provided at the top of the precast concrete column 2 so that high-strength concrete 8 can be injected into the groove 203 at the end. High-strength concrete 8 is injected into the gap of the groove 203 through the reserved grouting holes 202 of the precast concrete column 2.

[0040] The precast concrete beam 1 and the precast concrete column 2 are connected by a grooved cast steel member 3, a shear member 4, longitudinal reinforcement 5 of the precast concrete beam, longitudinal reinforcement 6 of the precast concrete column, short longitudinal reinforcement 7, and high-strength concrete filling 8.

[0041] The shear-resistant member 4 is filled into the perforated groove 301 opened in the grooved cast steel member 3.

[0042] It also includes a grooved cast steel component 3, which is made of cast steel and is embedded in a concrete groove opened on one end face of the precast concrete beam 1.

[0043] The shear-resistant member 4 is supported by a formwork on the perforated groove 301 of the slotted cast steel member 3, and high-strength concrete is poured.

[0044] Two rows of at least eight connecting sleeves 303 are installed on the grooved cast steel component 3. The longitudinal reinforcing bars 5 of the precast concrete beam and the longitudinal reinforcing bars 6 of the precast concrete column are welded into the connecting sleeves 303.

[0045] The longitudinal steel bars 5 of the precast concrete beam and the longitudinal steel bars 6 of the precast concrete column are connected by the connecting sleeve 303 of the grooved cast steel component 3.

[0046] A groove with holes 301 is provided at the center of the grooved cast steel component 3, and an inner hole 302 is provided at the center of the groove with holes 301.

[0047] The longitudinal steel bars 5 of the precast concrete beam 1 are connected to the longitudinal steel bars 6 of the precast concrete column 2 through the connecting sleeve 303. One end of the short longitudinal steel bar 7 is connected to the grooved cast steel component 3 through the groove 302 in the groove 301 and the installed nut 9. The other end is connected to the glue injection sleeve 201 opened on the precast concrete column 2.

[0048] The grooved cast steel component 3 and the short longitudinal steel bar 7 are connected by the groove 302 in the groove 301 and the nut 9.

[0049] The shear-resistant member 4 is formed by casting high-strength concrete on the perforated groove 301 of the grooved cast steel member 3. After the concrete has cured, the shear-resistant member 4 is formed. The precast concrete beam 1, precast concrete column 2 and grooved cast steel member 3 are assembled. Concrete is injected through one of the reserved grouting holes 202. When the concrete reaches the other reserved grouting hole 202, the injection of concrete is stopped and the curing is carried out until the standard strength is reached. The concrete is cured within 12 hours after the pouring is completed. If the curing time is greater than 14 days, the shear and bending resistance can be improved.

Claims

1. A precast concrete assembled beam-column cast steel joint, characterized in that, Including precast concrete beams (1). A concrete groove is provided on one end face of the precast concrete beam (1), and a grooved cast steel component (3) is embedded in the concrete groove. A precast concrete column (2) is installed at one end of the precast concrete beam (1) on the side facing the grooved cast steel member (3); The precast concrete beam (1) and the precast concrete column (2) are connected by a grooved cast steel member (3), a shear member (4), longitudinal reinforcement (5) of the precast concrete beam, longitudinal reinforcement (6) of the precast concrete column, short longitudinal reinforcement (7) and high-strength concrete (8). A groove (203) is provided on the precast concrete column (2) near the grooved cast steel component (3), and at least two reserved grouting holes (202) connecting the grooves (203) are provided at the top of the precast concrete column (2). An injection sleeve (201) is installed on the precast concrete column (2) at the end away from the grooved cast steel component (3). Two rows of at least eight connecting sleeves (303) are installed on the grooved cast steel component (3). The longitudinal steel bars (5) of the precast concrete beam and the longitudinal steel bars (6) of the precast concrete column are welded into the connecting sleeve (303). A perforated groove (301) is also provided at the center of the grooved cast steel component (3). At least four groove holes (302) are evenly distributed at the center of the perforated groove (301); High-strength concrete is poured into the groove (301) with holes in the slotted cast steel component (3), and a shear-resistant component (4) is formed after the concrete has been cured. Two rows of at least four steel bar holes (204) are also provided in the precast concrete column (2). Short longitudinal steel bars (7) are inserted in both rows of steel bar holes (204). One end of the short longitudinal steel bar (7) is connected to the glue injection sleeve (201), and the other end passes through the slotted hole (302) and is then fixed to the slotted cast steel component (3) by the installed nut (9). High-strength concrete (8) is also injected into the groove (203) through the reserved grouting hole (202); The grooved cast steel component (3) is made of cast steel.

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