A concrete-filled square steel tube split column structure with a shear-type lead damper
By separating the steel pipe concrete columns into separate columns and setting up shear-type lead dampers, the problem of insufficient seismic performance and toughness of giant cross-section steel pipe concrete columns is solved, and higher energy consumption capacity and structural toughness are achieved, which is suitable for improving building seismic performance.
Patent Information
- Application Number
- CN202310192557.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-03-02
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2043-03-02
AI Technical Summary
In terms of seismic resistance, the giant cross-section steel pipe concrete column has problems such as reduced joint working performance of steel and concrete and insufficient toughness of components, especially under large cross-sectional sizes, which can easily lead to edge damage and affect structural toughness.
The entire cross-section column is divided into multiple equal-section split columns, and a shear-type lead damper is set in the vertical joint. The steel pipe is combined with the shear-type lead damper through welding and bolt connections to form a shear-type lead damper with serrated steel plate and metal lead core, which enhances energy consumption capacity.
The stiffness and toughness of the steel pipe concrete split column is improved, the seismic resistance is enhanced, the design gap of this type of structure is filled, and the energy consumption can be effectively consumed during shock and the overall stiffness of the structure is maintained.
Smart Images
Figure CN116104218B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of concrete split column structures, and particularly to a concrete-filled square steel tube split column structure with shear-type lead dampers. Background Art
[0002] Urban resilience has become a hot issue in current research, and the seismic or lateral resistance resilience of components is the key to improving the resilience of structures. There are large-section concrete-filled steel tube columns in a large number of super high-rise buildings, bridges and other structures, and their mechanical and seismic properties are important factors affecting the resilience of structures.
[0003] The concrete-filled steel tube structure is a structure formed by filling concrete in a steel tube. In this structure, the two materials of the steel tube and the concrete work together, overcoming the defects of the two when they are stressed alone. The concrete material has good compressive performance, and at the same time, the presence of concrete can delay the buckling of the steel tube. Compared with the reinforced concrete structure, the bearing capacity of the concrete-filled steel tube structure is significantly improved, and the ductility and plasticity performance are greatly improved. At the same time, the concrete-filled steel tube column has high seismic performance, but when the cross-section of the steel tube is large, the relatively thick steel tube wall will reduce the cooperative working performance between the steel and the concrete. At the same time, the large cross-section size is more likely to cause damage to the edge of the cross-section, which is not conducive to giving full play to the material performance, and the toughness of the component is low.
[0004] At the same time, the concrete-filled steel tube column has high seismic performance. However, as described by Zhang Jianwei et al. in "Influence of Different Structural Measures on the Mechanical Properties of Special-shaped Cross-section Multi-chamber Concrete-filled Steel Tube Columns", for a pure concrete-filled steel tube column with a large cross-section compared to a concrete-filled steel tube column with certain structural measures, the relatively thick steel tube wall will reduce the cooperative working performance between the steel and the concrete. At the same time, the large cross-section size is more likely to cause damage to the edge of the cross-section, which is not conducive to giving full play to the material performance, and the toughness of the component is low. Summary of the Invention
[0005] In order to overcome the above defects existing in the prior art, the purpose of the present invention is to provide a concrete-filled square steel tube split column structure with shear-type lead dampers, which divides the overall cross-section column into multiple split columns with equal cross-sections and sets dampers in the opened vertical seams to improve the stiffness and toughness of the concrete-filled steel tube split column, and further improve its energy dissipation capacity.
[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is:
[0007] A concrete-filled square steel tube split column structure with shear-type lead dampers, comprising a plurality of steel tubes, and shear-type lead dampers are arranged between the outer walls of adjacent steel tubes.
[0008] The cross-section of the steel pipe is rectangular, with the four-sided steel plates having the same thickness and height, and the interior is filled with concrete. The two ends of the steel pipe are welded to the adjacent steel pipes through cross connecting plates.
[0009] The shear-type lead damper consists of two steel plates with sawteeth, which are arranged facing each other. The interior of the steel plates arranged facing each other is filled with metallic lead, and there is no rigid connection between the two side steel plates. There is a through slot left between the ends of the two steel plates with sawteeth.
[0010] The two steel plates with sawteeth together form the outer steel wall of the shear-type lead damper. The outer steel wall of the shear-type lead damper is a cuboid structure as a whole. The contact surface between the outer steel wall of the shear-type lead damper and the steel pipe should be smooth and free of warping. There are protruding rectangular steel teeth on the contact surface between the steel plate with sawteeth and the metallic lead.
[0011] The protruding rectangular steel teeth are obtained by turning the outer steel wall of the shear-type lead damper on a lathe. The protruding rectangular steel teeth are stagger-toothed on the outer walls on both sides of the shear-type lead damper, that is, the middle positions of the rectangular steel teeth on one side are aligned with those on the other side.
[0012] On both sides of the shear-type lead damper are steel baffles with connecting welds.
[0013] The steel baffles are used to prevent the internal metallic lead from overflowing due to the dislocation structural deformation of the steel walls on both sides of the shear-type lead damper. The connection method between the steel baffles and the steel walls on both sides of the shear-type lead damper is welding connection. To ensure the normal operation of the shear-type lead damper, only one side of the steel baffles and the steel walls on both sides of the shear-type lead damper is welded, and the other side is in a blank state.
[0014] The shear-type lead damper is welded to the steel pipe through the welding seams on the outer wall. The welding seams are full-length welding seams. At the same time, two bolt holes are respectively opened on the surface of the shear-type lead damper and are connected to the adjacent two steel pipes through bolts.
[0015] There are a total of four steel pipes, which are arranged at equal intervals in two rows and two columns.
[0016] Advantages of the present invention:
[0017] The structure of the present invention not only has the advantages of steel pipe concrete columns and split columns, but also can improve the overall performance and seismic toughness of the split columns. The addition of the shear-type lead damper fully improves the seismic performance of the structure and fills the design blank of this type of structure at the same time.
[0018] The addition of the shear-type lead damper fully improves the seismic performance of the structure. Specifically, the shear-type lead damper mainly consists of two toothed outer walls and a lead core made of metallic lead. The two toothed outer walls on both sides are connected to the concrete-filled steel tubes in contact on both sides through a hybrid form of bolt welding. When the relative displacement occurs in the vertical joints between the columns due to external forces or deformation of the concrete-filled steel tubes, it drives the toothed outer walls on both sides of the damper to move relative to each other, thereby shearing the internal lead core to play an energy dissipation role. At the same time, the present invention fills the design gap of this type of structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic cross-sectional view of an embodiment of the present invention.
[0020] Figure 2 It is a schematic three-dimensional view of an embodiment of the present invention.
[0021] Figure 3 It is a schematic cross-sectional view of the lead damper of an embodiment of the present invention.
[0022] Figure 4 It is a schematic view of the connection between the lead damper and the outer wall of the steel tube of an embodiment of the present invention.
[0023] Figure 5 It is a schematic view of the connection of the steel baffles at both ends of the lead damper of an embodiment of the present invention.
[0024] In the figure: 1 is the steel tube, 2 is the shear-type lead damper, 3 is the concrete, 4 is the external steel wall, 5 is the protruding rectangular steel teeth, 6 is the metallic lead filler, 7 is the connection point, 8 is the welding seam, 9 is the steel baffle, and 10 is the connection weld. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] The present invention will be further described in detail below with reference to the accompanying drawings.
[0026] As Figure 1 and Figure 2 shown, this embodiment provides a concrete-filled square steel tube split column structure with a shear-type lead damper, including a steel tube 1. The steel tube 1 is a hollow structure with an outer wall part and a hollow space. The steel tube can be formed by welding four equal-length and equal-thickness steel plates, or can be a formed rectangular steel tube conforming to national standards. There are four steel tubes in total, arranged in two rows and two columns at equal intervals. Shear-type lead dampers 2 are respectively arranged on the outer walls between the steel tubes. By symmetrically and equidistantly arranging the shear-type lead dampers 2, the concrete-filled square steel tube split column structure can have sufficient and equal energy dissipation capacity in any direction of force or deformation.
[0027] Specifically, the interior of the concrete-filled square steel tubular split column structure of the shear-type lead damper is filled with concrete with a strength of C30, and no steel bars are embedded inside. Between the four steel pipes 1 of this split structure, cross connecting plates are made at both ends of the four steel pipes 1 and welded to the four steel pipes 1 to ensure the integrity between the four steel pipes 1, thereby ensuring the integrity of the structure, so as to prevent damage to the structure before the shear-type lead damper between the steel pipes has not fully exerted or has not exerted its energy dissipation capacity.
[0028] As Figure 3 shown, the shear-type lead damper 2 on a concrete-filled square steel tubular split column structure with a shear-type lead damper includes the outer steel wall 4 of the shear-type lead damper. The outer wall of the outer steel wall 4 of the shear-type lead damper is smooth to ensure full contact with the outer wall of the steel pipe, facilitating welding and uniform transmission of force.
[0029] Specifically, there are protruding rectangular steel teeth 5 on the inner wall of the outer steel wall 4 of the shear-type lead damper. The protruding rectangular steel teeth 5 are obtained by turning the outer steel wall of the shear-type lead damper on a lathe. The protruding rectangular steel teeth 5 are staggered on the outer walls on both sides of the shear-type lead damper, that is, one end of the rectangular steel teeth is aligned with the middle position between the two rectangular steel teeth at the other end. Staggering the protruding rectangular steel teeth 5 can ensure that the lead core can fully exert its shear deformation energy dissipation capacity under the action of the teeth on both sides, and at the same time can reduce the shear splitting ability of the teeth on both sides of the component for the internal lead core, avoiding the situation of overflow or being broken into several segments.
[0030] Specifically, the interior of the shear-type lead damper 2 is filled with metallic lead 6, and a through slot is left in the middle of the outer steel wall 4 of the shear-type lead damper to ensure that the metallic lead has sufficient shear deformation energy dissipation capacity.
[0031] As Figure 2 and Figure 4 shown, the connection schematic diagram of the shear-type lead damper 2 on a concrete-filled square steel tubular split column structure with a shear-type lead damper and the outer wall of the steel pipe 1 includes the bolted connection point 7 between the shear-type lead damper 2 and the outer wall of the steel pipe 1 and the welded seam position 8 between the shear-type lead damper and the outer wall of the steel pipe.
[0032] Specifically, the bolted connection point 7 between the shear-type lead damper 2 and the outer wall of the steel pipe 1 is to make bolt holes at the positions shown in the figure. The bolt holes penetrate the steel plate 1 and the shear-type lead damper 2, and then bolted connections are made at the bolt hole positions. At the same time, the bolted connection is only made between the outer wall of the shear-type lead damper 2 and the outer wall of the steel pipe 1, and no connection is made between the outer walls on both sides of the shear-type lead damper 2. Through the bolted connection treatment, the connection strength between the shear-type lead damper 2 and the steel pipe 1 is enhanced, avoiding premature failure of the structure caused by insufficient connection strength.
[0033] Specifically, the welded joint 8 between the shear-type lead damper 2 and the outer wall of the steel pipe 1 is a full-length welded joint, that is, the four walls of the shear-type lead damper 2 are fully welded to the outer wall of the steel pipe to ensure the connection strength between the shear-type lead damper 2 and the steel pipe 1.
[0034] As Figure 5 shown, the connection schematic diagram of the steel baffles 9 at both ends of the shear-type lead damper on a concrete-filled square steel tube column structure with a shear-type lead damper includes the steel baffles 9 at both ends of the shear-type lead damper and the connecting weld 10 between the steel baffles at both ends of the shear-type lead damper. The function of the steel baffles 9 at both ends of the shear-type lead damper is to prevent the internal metal lead from overflowing due to the dislocation structural deformation of the steel walls on both sides of the lead damper. The connection method is welding connection, but in order to ensure the normal operation of the lead damper, one side is welded and the other side is left empty, as specifically shown in the connecting weld 10 between the steel baffles at both ends of the shear-type lead damper.
[0035] Specifically, the welding is carried out between the steel baffles on both sides and the outer wall of the steel pipe, and the weld is a full-length continuous weld.
[0036] Subsequently, the present invention will be based on this structure to conduct actual seismic tests.
[0037] The working principle of the present invention:
[0038] When a minor earthquake or moderate earthquake occurs, the overall deformation of the concrete-filled square steel tube column with a shear-type lead damper is relatively small, so there is a certain degree of dislocation between the steel pipes 1, and the shear-type lead damper 2 will not be damaged under this degree of dislocation deformation. Therefore, during a minor earthquake or moderate earthquake, the shear-type lead damper 2 between the steel pipes 1 can not only play an energy dissipation role but also transfer shear force to maintain the overall stiffness of the concrete-filled steel tube column. That is, the concrete-filled square steel tube column with a shear-type lead damper can reduce the structural displacement during an earthquake and enable it to continue to be used after the earthquake. When a strong earthquake occurs, the shear-type lead damper 2 between the steel pipes is damaged due to the large inter-column deformation and thus loses its effectiveness. Then this energy-dissipating split column completely becomes a concrete-filled steel tube split column, making the component have high ductility and ensuring the safety of the structure.
Claims
1. A concrete-filled square steel tube split column structure with a shear-type lead damper, characterized in that It includes steel pipes (1), and multiple steel pipes (1) are provided. A shear-type lead damper (2) is arranged between the outer walls of adjacent steel pipes (1). The shear-type lead damper (2) consists of two steel plates with sawteeth. The steel plates with sawteeth are arranged facing each other, and the interior between the facing steel plates is filled with metallic lead (6). There is no rigid connection between the two side steel plates, and a through slot is left between the ends of the two steel plates with sawteeth. On both sides of the shear-type lead damper (2) are steel baffles (9), and the steel baffles (9) are connected by connection welds (10). The steel baffles (9) are used to prevent the occurrence of the phenomenon of the overflow of the internal metallic lead (6) caused by the dislocation structural deformation of the steel walls on both sides of the shear-type lead damper (2). The connection method between the steel baffles (9) and the steel walls on both sides of the shear-type lead damper (2) is welding connection. To ensure the normal operation of the shear-type lead damper (2), only one-sided welding is carried out between the steel baffles (9) and the steel walls on both sides of the shear-type lead damper (2), and the other side is in a blank state. There are a total of four steel pipes (1), which are arranged at equal intervals in two rows and two columns.
2. The concrete-filled square steel tubular split column structure with a shear-type lead damper according to claim 1, characterized in that, The cross-section of the steel pipe (1) is rectangular, the four-side steel plates are of equal thickness and height, and the interior is filled with concrete (3). The two ends of the steel pipe (1) are welded to the adjacent steel pipe (1) through a cross connecting plate.
3. A concrete-filled square steel tube split column structure with a shear-type lead damper according to claim 1, characterized in that, The two steel plates with sawteeth together form the outer steel wall (4) of the shear-type lead damper. The outer steel wall (4) of the shear-type lead damper is a cuboid structure as a whole. The contact surface between the outer steel wall (4) of the shear-type lead damper and the steel pipe (1) should be smooth and without warping. There are protruding rectangular steel teeth (5) on the contact surface between the steel plate with sawteeth and the metallic lead (6).
4. A concrete-filled square steel tubular split column structure with a shear-type lead damper according to claim 3, characterized in that, The protruding rectangular steel teeth (5) are obtained by turning the outer steel wall (4) of the shear-type lead damper on a lathe. The protruding rectangular steel teeth (5) are stagger-toothed on the outer walls on both sides of the shear-type lead damper (2), that is, the middle positions of the protruding rectangular steel teeth (5) on one side are aligned with those on the other side.
5. A concrete-filled square steel tubular split column structure with a shear-type lead damper according to claim 1, characterized in that, The shear-type lead damper (2) is welded to the steel pipe (1) through an outer wall welding seam (8). The welding seam (8) is a full-length welding seam. At the same time, two bolt holes are respectively opened on the surface of the shear-type lead damper (2), and it is connected to the adjacent two steel pipes (1) through bolts.
Citation Information
Patent Citations
Assembled self-resetting energy dissipation shear wall
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