A rigid connection node between a steel beam and a concrete column

Abstract

The present invention belongs to the field of construction engineering technology and is a rigid connection between a steel beam and a concrete column. The technical solution is as follows: a rigid connection between a steel beam and a concrete column, comprising a steel beam, a connecting steel section, an anchoring steel section, and a concrete column; the ends of the steel beam are spliced ​​and connected to the connecting steel section, which is fixed to the middle portion of the anchoring steel section, and the anchoring steel section is longitudinally pre-embedded in the concrete column; horizontal partitions are provided between the flanges of the anchoring steel section, corresponding to the upper and lower flanges of the connecting steel section. This design enables refined design of strong joints between steel beams and concrete columns, reduces steel usage, facilitates construction, and shortens construction time.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering, in particular to a rigid connection node between a steel beam and a concrete column. Background Art

[0002] Prefabricated buildings primarily utilize precast concrete and steel structures. With the widespread adoption of prefabricated buildings in China, the demand for prefabrication rates continues to rise. Precast concrete structures are increasingly unable to meet these requirements, while steel structures are more expensive than precast concrete structures. For economic reasons, China is beginning to experiment with hybrid structures combining steel and concrete to increase prefabrication rates. For example, vertical walls and columns are constructed with concrete, while floors utilize steel beams and formwork-free composite slabs.

[0003] In addition to bearing vertical gravity loads, structures also resist lateral loads such as horizontal wind loads and earthquakes. Current structural design specifications require strong joints and weak components for rigid beam-column joints, ensuring that joints should not fail before components under moderate or severe earthquakes. For these vertical components, where concrete walls and columns are used, and steel floor beams are used, ensuring the reliability of the joints between the steel beams and concrete columns, thereby forming an integrated lateral force-resisting system, has become an urgent issue.

[0004] In addition, in concrete structures, steel beams and trusses are often used to meet large spans and cantilevers, taking advantage of the light weight and high strength of steel structures. The partial use of steel components in such concrete structures also raises the issue of connecting the steel beams to the concrete columns. Summary of the Invention

[0005] To solve the above technical problems, the present invention proposes a simple rigid connection node between a steel beam and a concrete column, which can reduce steel consumption, facilitate construction, and save construction time.

[0006] The technical solution is: a rigid connection node between a steel beam and a concrete column, comprising a steel beam, a connecting steel, an anchoring steel and a concrete column; the end of the steel beam is spliced ​​and connected to the connecting steel, the connecting steel is connected and fixed to the middle part of the anchoring steel, and the anchoring steel is longitudinally embedded in the concrete column; horizontal partitions are provided between the flanges of the anchoring steel at positions corresponding to the upper and lower flanges of the connecting steel.

[0007] Based on the above technical features: longitudinal reinforcement, rectangular stirrups and diamond stirrups are arranged inside the concrete column.

[0008] Based on the above technical features: steel beams and connecting steel sections are all H-shaped sections.

[0009] Based on the above technical features: the anchoring steel has a cross-shaped or H-shaped cross-section.

[0010] Based on the above technical features: a plurality of studs are welded on the outer surface of the flange of the anchor steel, and the studs are evenly arranged along the length direction of the anchor steel.

[0011] Based on the above technical features: the anchor steel is embedded in the concrete column and placed in the center, and the anchor steel is not less than 200 mm away from the four sides of the concrete column.

[0012] Based on the above technical features: the cross-sectional height of the anchoring steel shall not be less than 0.7 times the cross-sectional height of the steel beam, the flange thickness of the anchoring steel shall not be less than the flange thickness of the connecting steel, and the length of the anchoring steel extending from the upper and lower flange edges of the connecting steel shall not be less than 3 times the cross-sectional height of the anchoring steel.

[0013] Based on the above technical features: when the longitudinal reinforcement is interrupted by the connecting steel, it is fixed to the upper and lower flanges of the connecting steel through the sleeve; vertical stiffening ribs are arranged between the upper and lower flanges of the connecting steel at positions corresponding to the sleeves.

[0014] Based on the above technical features: the thickness of the horizontal partition shall not be less than the flange thickness of the connecting steel.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Technological advancement. By connecting anchor steel to the ends of steel beams and pre-embedding them in concrete columns, the steel beams and concrete columns effectively form an integrated lateral force resistance system, enabling refined design of strong node connections and meeting the seismic resistance requirement of ensuring that the nodes do not fail before the steel beams in moderate to severe earthquakes.

[0017] 2. Construction convenience. By pre-embedding a short length of anchor steel at the beam-column joint within the concrete column, the interlacing of steel and rebar within the entire column is avoided, reducing construction difficulty and facilitating project quality control. Furthermore, the pre-embedded anchor steel is lightweight, making it relatively easy to transport and hoist.

[0018] 3. Engineering economy: The rigid connection node between the steel beam and the concrete column of the present invention can replace the steel-concrete column with built-in through-steel by the reinforced concrete column, thereby saving steel and reducing engineering costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic elevation view of the first embodiment of the present invention.

[0020] Figure 2 It is a schematic top view of the first embodiment of the present invention.

[0021] Figure 3 This is embodiment 1 of the present invention Figure 1 Schematic diagram of the Ⅰ-Ⅰ section.

[0022] Figure 4It is a schematic top view of the second embodiment of the present invention.

[0023] Figure 5 This is a schematic top view of embodiment 3 of the present invention.

[0024] Figure 6 This is a schematic elevation view of the fourth embodiment of the present invention.

[0025] Figure 7 This is a schematic top view of the fourth embodiment of the present invention.

[0026] Figure 8 This is the fourth embodiment of the present invention Figure 6 Schematic diagram of the II-II section.

[0027] Figure 9 This is a schematic top view of the fifth embodiment of the present invention.

[0028] Part Number Description

[0029] 1 steel beam

[0030] 2 Connecting steel

[0031] 3 Anchor steel

[0032] 4 concrete columns

[0033] 5 studs

[0034] 6 horizontal partitions

[0035] 7 sleeves

[0036] 8 vertical stiffeners

[0037] 9 longitudinal reinforcement

[0038] 10 rectangular stirrups

[0039] 11 diamond stirrups

[0040] 12 Concrete beams DETAILED DESCRIPTION

[0041] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. People familiar with this technology can easily understand other promotion and use methods, advantages and effects of the present invention from the contents disclosed in this specification.

[0042] Example 1

[0043] like Figures 1 to 3As shown, a rigid connection node between a steel beam and a concrete column includes a steel beam 1, a connecting steel 2, an anchoring steel 3 and a concrete column 4; the end of the steel beam 1 is spliced ​​and connected to the connecting steel 2, the connecting steel 2 is connected and fixed to the middle part of the anchoring steel 3, and the anchoring steel 3 is pre-buried in the concrete column 4; longitudinal reinforcement 9, rectangular stirrups 10 and diamond stirrups 11 are arranged inside the concrete column 4; between the flanges of the anchoring steel 3, horizontal partitions 6 are arranged at corresponding positions of the upper and lower flanges of the connecting steel.

[0044] The steel beam 1 and the connecting steel 2 are both H-shaped in cross-section. The ends of the steel beam 1 are spliced ​​and connected to the connecting steel 2 at the construction site. Preferably, the flanges can be connected by welding, and the webs can be connected by double connecting plates and multiple high-strength bolts, which facilitates installation and increases construction speed.

[0045] The anchoring steel 3 has a cross-section and is connected to the connecting steel 2 by welding in the factory.

[0046] A plurality of studs 5 are welded to the outer surface of the flange of the anchoring steel 3 , and the studs 5 are evenly arranged along the length direction of the anchoring steel 3 .

[0047] The anchoring steel 3 is embedded in the concrete column 4 and placed in the center. The distance between the anchoring steel 3 and the four sides of the concrete column 4 is not less than 200 mm, which can prevent the concrete column 4 from being damaged by the steel squeezing and shearing at the flange position of the anchoring steel 3 and meet the construction structural requirements.

[0048] The cross-sectional height of the anchoring steel 3 is no less than 0.7 times the cross-sectional height of the steel beam 1, the flange thickness of the anchoring steel 3 is no less than the flange thickness of the connecting steel 2, and the length of the anchoring steel 3 extending beyond the upper and lower flange edges of the connecting steel 2 is no less than three times the cross-sectional height of the anchoring steel 3. The present invention has verified, based on theoretical analysis and full-scale testing, that the length and cross-sectional parameters of the anchoring steel 3 meet the requirements for reliable embedding stiffness and bearing capacity of the steel beam 1 and can effectively transmit the internal forces of the steel beam 1 to the concrete column 4.

[0049] When the longitudinal reinforcement 9 is interrupted by the connecting steel 2, it is connected and fixed to the upper and lower flanges of the connecting steel 2 through the sleeve 7; vertical stiffening ribs 8 are provided between the upper and lower flanges of the connecting steel 2 at positions corresponding to the sleeve 7.

[0050] The thickness of the horizontal partition 6 is not less than the flange thickness of the connecting steel 2.

[0051] Example 2

[0052] The structure of this embodiment is basically the same as that of the first embodiment, and the difference from the first embodiment is that:

[0053] like Figure 4 As shown, the concrete column 4 is a side column, and is connected to the steel beam 1 only on the left, right and rear sides.

[0054] Example 3

[0055] The structure of this embodiment is basically the same as that of the first embodiment, and the difference from the first embodiment is that:

[0056] like Figure 5 As shown, the concrete column 4 is a corner column, and is connected to the steel beam 1 only on the right and rear sides.

[0057] Example 4

[0058] The structure of this embodiment is basically the same as that of the first embodiment, and the difference from the first embodiment is that:

[0059] like Figures 6 to 8 As shown, the concrete column 4 is a side column, and is connected to the steel beam 1 only on the left and right sides; the anchor steel 3 has an H-shaped cross-section, and multiple studs 5 are welded to the outer surface of its flange and both sides of the web, and the studs 5 are evenly arranged along the length direction of the anchor steel 3.

[0060] Example 5

[0061] The structure of this embodiment is basically the same as that of the first embodiment, and the difference from the first embodiment is that:

[0062] like Figure 9 As shown, the concrete column 4 is connected to the steel beam 1 only on one side, and the other three sides are all concrete beams 12; the anchoring steel 3 has an H-shaped cross-section, and multiple studs 5 are welded on the outer surface of its flange and both sides of the web, and the studs 5 are evenly arranged along the length direction of the anchoring steel 3.

[0063] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A rigid connection node between a steel beam and a concrete column, characterized by: The invention comprises a steel beam (1), a connecting steel (2), an anchoring steel (3) and a concrete column (4); the end of the steel beam (1) is spliced ​​and connected to the connecting steel (2); the connecting steel (2) is connected and fixed to the middle part of the anchoring steel (3); the anchoring steel (3) is longitudinally pre-buried in the concrete column (4); a horizontal partition (6) is provided between the flanges of the anchoring steel (3) and at positions corresponding to the upper and lower flanges of the connecting steel (2); The anchoring steel (3) has a cross-shaped or H-shaped cross section; The anchoring steel (3) is embedded in the concrete column (4) and placed in the center. The distance between the anchoring steel (3) and the four sides of the concrete column (4) is not less than 200 mm. The cross-sectional height of the anchoring steel (3) is not less than 0.7 times the cross-sectional height of the steel beam (1). The flange thickness of the anchoring steel (3) is not less than the flange thickness of the connecting steel (2). The length of the anchoring steel (3) extending from the upper and lower flanges of the connecting steel (2) is not less than 3 times the cross-sectional height of the anchoring steel (3). Longitudinal reinforcement (9), rectangular stirrups (10) and diamond stirrups (11) are arranged inside the concrete column (4); when the longitudinal reinforcement (9) is interrupted by the connecting steel (2), it is connected and fixed to the upper and lower flanges of the connecting steel (2) through a sleeve (7); vertical stiffening ribs (8) are arranged between the upper and lower flanges of the connecting steel (2) at positions corresponding to the sleeve (7).

2. The rigid connection node between a steel beam and a concrete column according to claim 1, characterized in that: The steel beam (1) and the connecting steel (2) both have H-shaped cross-sections.

3. The rigid connection node between a steel beam and a concrete column according to claim 1, characterized in that: The anchoring steel (3) has a cross-shaped or H-shaped cross section.

4. The rigid connection node between a steel beam and a concrete column according to claim 1, characterized in that: A plurality of studs (5) are welded to the outer surface of the flange of the anchoring steel (3), and the studs (5) are evenly arranged along the length direction of the anchoring steel (3).

5. The rigid connection node between a steel beam and a concrete column according to claim 1, characterized in that: The thickness of the horizontal partition (6) is not less than the flange thickness of the connecting steel (2).

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