A precast concrete column and steel beam connection node with internal partition

Abstract

The invention discloses a connection node between a precast concrete column and a steel beam with an inner partition, comprising an outer steel sleeve fixed to the node area, the outer steel sleeve fixed to the corresponding position of the precast concrete column and the node area, an upper inner partition and a lower inner partition both arranged in the outer steel sleeve, the upper and lower inner partitions are welded to the inner side wall of the outer steel sleeve at the corresponding position of the top and bottom of the steel beam and the node area, longitudinal reinforcement passing structure and concrete pouring holes are arranged on the upper inner partition and the lower inner partition, the outer steel sleeve and the steel cage of the precast concrete column are embedded in the concrete entity of the precast concrete column, the steel cage of the precast concrete column at the corresponding position of the outer steel sleeve is composed of longitudinal reinforcement, the outer side surface of the outer steel sleeve is flush with the outer side surface of the column, and a steel bracket connected to the steel beam is welded on the outer side surface corresponding to the outer steel sleeve and the steel beam. The invention has a simple structure and is easy to assemble; it has good mechanical properties, is safe and reliable; and has good integrity.

Description

Technical Field

[0001] The invention belongs to the technical field of building structures, and in particular relates to a connection node between a precast concrete column with an inner partition and a steel beam. Background Art

[0002] With the change in the development of my country's construction industry, the concept of building a city is not only to pursue modernization, but also to pay more attention to green, environmental protection, humanity, wisdom and livability. Prefabricated buildings have the characteristics of green construction and environmental protection and high efficiency. Therefore, promoting the development of prefabricated buildings has become a top priority in the construction industry. The frame structure has the advantages of flexible plane layout, large indoor space, reasonable structural force, and clear force transmission. It is widely used in industrial and civil building structures and is also one of the main structural forms of prefabricated buildings. In the traditional prefabricated concrete frame structure, the steel bars in the beam-column node area are dense, the concrete is difficult to pour and vibrate, and the construction efficiency is low, and the construction quality is difficult to guarantee. In the prefabricated steel structure, the beam-column node area also has problems such as complex structure. Therefore, in order to further promote the development of prefabricated buildings and promote the application of prefabricated buildings, it is urgent to develop a safe and reliable prefabricated frame beam-column connection node with good integrity, clear force transmission, simple structure and convenient construction to meet the requirements of modern building industrialization.

[0003] The hybrid frame structure of reinforced concrete columns and steel beams can give full play to the advantages of concrete columns and steel beams. It is a low-cost and high-efficiency structural form. However, if the node area adopts the traditional beam-through reinforced concrete-steel beam connection structure, the penetration of the steel beam will cause pressure damage to the node area, which requires complex structural measures to avoid. If the node area adopts the traditional column-through reinforced concrete-steel beam connection structure, in order to ensure the bearing capacity and energy consumption capacity of the node area, the amount of steel used in the node area will increase greatly, and problems such as difficult positioning of steel beams and complex structural plans are still difficult to solve. Summary of the invention

[0004] In order to solve the technical problems existing in the known technology, the present invention provides a precast concrete column and steel beam connection node with an inner partition, which has a simple structure and is easy to assemble; it has good mechanical properties, is safe and reliable; and has good integrity.

[0005] The technical solution adopted by the present invention to solve the technical problems existing in the known technology is: a precast concrete column with an inner partition and a steel beam connection node, the node includes an outer steel sleeve fixed to the node area, a steel corbel, an upper inner partition and a lower inner partition, the outer steel sleeve is fixed at a position corresponding to the precast concrete column and the node area, a structure working in cooperation with concrete is arranged in the outer steel sleeve, the upper inner partition and the lower inner partition are both arranged in the outer steel sleeve, and the upper inner partition is welded to the inner wall of the outer steel sleeve at a position corresponding to the node area at the top of the steel beam The lower inner partition is welded to the inner wall of the outer steel sleeve at the position corresponding to the node area at the bottom of the steel beam, and longitudinal reinforcement passing through the structure and concrete pouring holes are provided on the upper inner partition and the lower inner partition. The outer steel sleeve and the steel cage of the precast concrete column are embedded in the concrete entity of the precast concrete column, and the steel cage of the precast concrete column at the position corresponding to the outer steel sleeve is composed of longitudinal reinforcement. The outer side surface of the outer steel sleeve is flush with the outer side surface of the column, and the steel corbel connected to the steel beam is welded on the outer side surface corresponding to the outer steel sleeve and the steel beam.

[0006] The upper inner baffle and the lower inner baffle have the same structure and are both provided with four evenly distributed peripheral notches as one of the longitudinal reinforcement passing structures. The solid side length of the upper inner baffle after the notches are opened is not less than the top size of the steel corbel, and the solid side length of the lower inner baffle after the notches are opened is not less than the bottom size of the steel corbel.

[0007] Shear bolts vertically welded to the outer steel sleeve are arranged inside the outer steel sleeve.

[0008] The upper inner baffle and the lower inner baffle are connected to the outer steel sleeve through plug welds respectively.

[0009] The steel corbel is connected to the steel beam via a connecting plate.

[0010] The cross-sectional dimensions of the steel corbel and the steel beam are the same.

[0011] The steel corbel is connected to the steel beam face to face.

[0012] The cross section of the steel beam is H-shaped, the steel corbel is made of H-shaped steel, and the steel corbel and the web of the steel beam are connected by connecting plates and high-strength bolts.

[0013] The upper flange of the steel corbel is connected to the upper flange of the steel beam through a penetration weld, and the lower flange of the steel corbel is connected to the lower flange of the steel beam through a penetration weld.

[0014] The flange and web of the steel corbel are connected to the outer side surface of the outer steel sleeve by double-sided fillet welds.

[0015] The advantages and positive effects of the present invention are:

[0016] 1) The upper and lower inner partitions transfer the bending moment of the beam ends, and the force transmission is clear, safe and reliable. The steel bracket is welded to the outer steel sleeve to meet the rigid node requirements.

[0017] 2) The rectangular steel tubes and shear studs outside the node area directly participate in the shear resistance of the node. The existence of shear studs reduces the possibility of the outer steel sleeve being pulled out of the concrete and improves the collaborative working performance between the steel sleeve and concrete.

[0018] 3) The concrete in the rectangular steel tube in the node area does not need to be equipped with stirrups, which reduces the complexity of node construction and improves construction efficiency. The rectangular steel tube provides effective lateral constraints on the concrete in the node area, significantly improving the bearing capacity and ductility of the node. At the same time, the rectangular steel tube is only set in the node area and does not directly bear the vertical load, which effectively avoids the reduction of the restraint effect of the local buckling of the steel tube on the concrete, saves steel, and reduces the cost of rust and corrosion prevention treatment of steel structures.

[0019] 4) The beam-column node structure of the present invention is simple, all parts can be manufactured in the factory, welding is convenient, and the quality of the weld is easy to ensure. The steel components in the node area are all manufactured and connected in the factory. The steel bracket is welded to the outer surface of the steel sleeve after the column component is transported to the construction site, which can avoid high-altitude welding operations and ensure that the node area has good overall performance. The steel beam is connected to the steel bracket through reserved bolt holes and welding at the construction site, and the assembly construction efficiency is high, which is conducive to ensuring the construction quality.

[0020] In summary, compared with the outer ring plate, the present invention can save steel, and compared with the traditional inner partition plate, it is convenient for the column longitudinal reinforcement to pass through, and allows the column longitudinal reinforcement to adopt a bundled and efficient reinforcement form, which is beneficial to concrete pouring and vibration compaction, and has great advantages in mechanical properties, seismic performance and construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a detailed structural schematic diagram of the present invention;

[0023] Figure 3 It is a schematic elevation diagram of the present invention;

[0024] Figure 4 It is a side schematic diagram of the present invention;

[0025] Figure 5 for Figure 3 Sectional view of AA.

[0026] In the figure: 1. External steel sleeve; 2. Shear studs; 3. Upper inner partition; 30. Peripheral notch; 31. Longitudinal reinforcement penetration hole; 32. Concrete pouring hole; 4. Lower inner partition; 40. Peripheral notch; 41. Longitudinal reinforcement penetration hole; 42. Concrete pouring hole; 5. Precast concrete column longitudinal reinforcement; 6. Concrete entity; 7. Steel corbel; 70. Steel corbel flange; 71. Steel corbel web; 710. Bolt holes on the steel corbel web; 8. Connecting plate; 9. Steel beam. DETAILED DESCRIPTION

[0027] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0028] See also Figure 1 to Figure 5 A precast concrete column and steel beam connection node with an inner partition, the node comprising an outer steel sleeve 1 fixed to the node area, a steel corbel 7, an upper inner partition 3 and a lower inner partition 4, the outer steel sleeve 1 is fixed at a position corresponding to the precast concrete column and the node area, a structure cooperating with concrete is provided in the outer steel sleeve 1, the upper inner partition 3 and the lower inner partition 4 are both arranged in the outer steel sleeve 1, the upper inner partition 3 is welded to the inner side wall of the outer steel sleeve 1 at a position corresponding to the node area at the top of the steel beam, and the lower inner partition 4 is welded to the node area at the bottom of the steel beam. The inner wall of the outer steel sleeve 1 is welded at the corresponding position, and longitudinal reinforcement penetration structures and concrete pouring holes 32, 42 are provided on the upper inner partition 3 and the lower inner partition 4. The outer steel sleeve 1 and the steel cage of the precast concrete column are embedded in the concrete entity 6 of the precast concrete column. The steel cage of the precast concrete column at the corresponding position of the outer steel sleeve 1 is composed of longitudinal reinforcement 5. The outer side surface of the outer steel sleeve 1 is flush with the outer side surface of the column, and the steel corbel 7 connected to the steel beam 9 is welded on the outer side surface of the outer steel sleeve 1 corresponding to the steel beam 9.

[0029] The concrete inside the steel sleeve in the node area does not need to be equipped with stirrups, which reduces the complexity of node construction and improves construction efficiency. The steel sleeve provides effective lateral constraints on the concrete in the node area, significantly improving the bearing capacity and ductility of the node. At the same time, the steel sleeve is only set in the node area and does not directly bear the vertical load, which effectively avoids the reduction of the constraint effect of the concrete on the local buckling of the steel sleeve, saves the amount of steel, and reduces the cost of rust and corrosion prevention treatment of the steel structure. The steel beam 9 can directly transfer the bending moment and shear force to the steel corbel 7, and the steel corbel 7 can directly transfer the bending moment to the node area through the upper and lower inner partitions; the steel sleeve 1 directly bears the shear force, the force transmission path is clear, the mechanical properties are good, and it is safe and reliable. The steel sleeve 1, the upper and lower inner partitions and the steel corbel 7 are all processed and manufactured in the factory to ensure their manufacturing and construction quality. The steel components in the node area are all prefabricated, which ensures that the node area has good overall performance.

[0030] The present invention also has the following improvements:

[0031] The upper inner partition 3 and the lower inner partition 4 have the same structure, and are both provided with four evenly distributed peripheral notches 30, 40 as one of the longitudinal reinforcement passing structures. The physical side length of the upper inner partition 3 after the notch 30 is opened is not less than the top size of the steel corbel 7, and the physical side length of the lower inner partition 4 after the notch 40 is opened is not less than the bottom size of the steel corbel 7. The precast concrete column longitudinal reinforcement 5 passes through the notches 30, 40 and through holes 31, 41 of the upper inner partition 3 and the lower inner partition 4 according to the designed position. Because the notches 30, 40 are relatively large in size, a bundled efficient reinforcement form can be adopted, which is convenient for construction.

[0032] Shear studs 2 are vertically welded inside the outer steel sleeve 1 to increase the interface friction between the concrete body 6 and the outer steel sleeve 1, reduce the slip between the concrete and the steel sleeve, and improve the cooperative working performance between steel and concrete. The shear studs 2 are used as the structure in the outer steel sleeve that cooperates with the concrete, which is convenient for construction. Other structures such as anchor bars can also be used.

[0033] The upper inner baffle plate 3 and the lower inner baffle plate 4 are respectively connected to the outer steel jacket 1 through plug welding seams, which is convenient for construction.

[0034] The steel corbel 7 is connected to the steel beam 9 via a connecting plate 8 to ensure connection strength.

[0035] In this embodiment, the cross-sectional dimensions of the steel corbel 7 and the steel beam 9 are the same, and the two are connected face to face. The cross-section of the steel beam 9 is H-shaped, and the steel corbel 7 is made of H-shaped steel. The webs of the steel corbel 7 and the steel beam 9 are connected by connecting plates 8 and high-strength bolts. Bolt holes 710 are provided on the webs 71 of the steel corbel, and the bolt holes 710 are used for bolt connection with the connecting plates 8. The upper flange of the steel corbel 7 is connected to the upper flange of the steel beam 9 by a penetration weld, and the lower flange of the steel corbel 7 is connected to the lower flange of the steel beam 9 by a penetration weld. The flange 70 and web 71 of the steel corbel 7 are connected to the outer side surface of the outer rectangular steel plate 1 by double-sided fillet welds. The connection between steel beams and steel corbels can be made by welding, bolting or bolt-welding according to design requirements, which makes it easy to achieve "strong columns and weak beams". In addition, the outer steel sleeve is only set in the node area, which effectively restrains the lateral deformation of the concrete in the core area of ​​the node and avoids the occurrence of compressive buckling of the steel sleeve, giving full play to the respective advantages of steel and concrete, improving the bearing capacity and ductility of the node, and making it easy to achieve "strong nodes and weak components" in the design.

[0036] Construction method of the above nodes:

[0037] 1) In the factory, the outer steel sleeve 1 is manufactured, and the shear studs 2 are welded on the inner side of the outer steel sleeve 1; the upper inner partition 3 and the lower inner partition 4 are manufactured according to the design parameters; then the upper inner partition 3 and the lower inner partition 4 are welded to the inner side of the outer steel sleeve 1, and then the precast concrete column longitudinal reinforcement 5 is passed through the peripheral notches 30, 40 and the through holes 31, 41 of the upper inner partition 3 and the lower inner partition 4, and then the stirrups are tied on the precast concrete column longitudinal reinforcement 5 located outside the outer steel sleeve 1 to complete the manufacture of the precast concrete column reinforcement cage;

[0038] 2) Forming in the factory, using the formwork to fix the outer steel sleeve 1 to the node area, pouring concrete 6, pouring concrete through the concrete pouring holes 32, 42 in the node area and vibrating and compacting it, curing, and forming a precast concrete column;

[0039] 3) At the construction site, a steel bracket 7 is welded on the outer side of the outer steel casing 1;

[0040] 4) Hoist the precast concrete column with steel bracket 7 and connect the steel beam 9 with the steel bracket 7.

[0041] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can make many forms without departing from the scope of protection of the present invention and the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A connection node between a precast concrete column and a steel beam with an inner partition, characterized in that: The node comprises an outer steel sleeve fixed to the node area, a steel corbel, an upper inner diaphragm and a lower inner diaphragm, the outer steel sleeve is fixed at a position corresponding to the precast concrete column and the node area, a structure cooperating with concrete is arranged in the outer steel sleeve, the upper inner diaphragm and the lower inner diaphragm are both arranged in the outer steel sleeve, the upper inner diaphragm is welded to the inner side wall of the outer steel sleeve at a position corresponding to the node area at the top of the steel beam, the lower inner diaphragm is welded to the inner side wall of the outer steel sleeve at a position corresponding to the node area at the bottom of the steel beam, longitudinal reinforcement passing structure and concrete pouring holes are arranged on the upper inner diaphragm and the lower inner diaphragm, the outer steel sleeve and the steel cage of the precast concrete column are embedded in the concrete entity of the precast concrete column, the steel cage of the precast concrete column at the position corresponding to the outer steel sleeve is composed of longitudinal reinforcement, the outer side surface of the outer steel sleeve is flush with the outer side surface of the column, and the steel corbel connected to the steel beam is welded on the outer side surface corresponding to the outer steel sleeve and the steel beam; The upper inner baffle and the lower inner baffle have the same structure and are both provided with four evenly distributed peripheral notches as one of the longitudinal reinforcement passing structures. The solid side length of the upper inner baffle after the notches are opened is not less than the top size of the steel corbel, and the solid side length of the lower inner baffle after the notches are opened is not less than the bottom size of the steel corbel.

2. The precast concrete column and steel beam connection node with inner partition according to claim 1 is characterized in that: Shear bolts vertically welded to the outer steel sleeve are arranged inside the outer steel sleeve.

3. The precast concrete column and steel beam connection node with inner partition according to claim 1, characterized in that: The upper inner baffle and the lower inner baffle are connected to the outer steel sleeve through plug welds respectively.

4. The precast concrete column and steel beam connection node with inner partition according to claim 1, characterized in that: The steel corbel is connected to the steel beam via a connecting plate.

5. The precast concrete column and steel beam connection node with inner partition according to claim 1, characterized in that: The cross-sectional dimensions of the steel corbel and the steel beam are the same.

6. The precast concrete column and steel beam connection node with inner partition according to claim 5, characterized in that: The steel corbel is connected to the steel beam face to face.

7. The precast concrete column and steel beam connection node with inner partition according to claim 6, characterized in that: The cross section of the steel beam is H-shaped, the steel corbel is made of H-shaped steel, and the steel corbel and the web of the steel beam are connected by connecting plates and high-strength bolts.

8. The precast concrete column and steel beam connection node with inner partition according to claim 7, characterized in that: The upper flange of the steel corbel is connected to the upper flange of the steel beam through a penetration weld, and the lower flange of the steel corbel is connected to the lower flange of the steel beam through a penetration weld.

9. The precast concrete column and steel beam connection node with inner partition according to claim 7, characterized in that: The flange and web of the steel corbel are connected to the outer side surface of the outer steel sleeve by double-sided fillet welds.

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