Self-resetting energy dissipation square steel tube column foot and steel structure

Abstract

The invention discloses a self-resetting energy dissipation square steel tube column foot and a steel structure, and belongs to the technical field of steel structure damping. Energy consumption devices are additionally arranged on the two sides of the column foot portion of the square steel pipe column respectively, self-resetting compression devices are installed on the energy consumption devices, and the square steel pipe column is sleeved with an anchoring tool. The vertically-arranged energy dissipation device is driven by movement of the square steel pipe column to stretch and compress, and the energy dissipation device is driven by stretching and compression of the self-resetting telescopic device to bend and deform so as to dissipate earthquake energy transmitted to the square steel pipe column. When a corner occurs on the column base, the prestressed steel strand generates cable force on the square steel column, so that the column base with the corner can be pulled to the original position, the self-resetting function is achieved, the double-insurance effect is achieved, and the difficulty and cost of post-earthquake repair are greatly reduced; the problem that an existing square steel pipe column is poor in damping function is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure shock absorption, and in particular to a self-resetting energy-consuming square steel tube column foot and a steel structure. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The losses and impacts caused by earthquakes are enormous. In traditional steel structure buildings, the damage to the main structure during an earthquake is reduced by designing steel column base nodes with shock-absorbing functions, thereby reducing the losses caused by earthquakes.

[0004] There are existing steel structure column base nodes with shock-absorbing functions. Some technical solutions provide energy absorption capacity by installing energy absorption components at the column base node position of the column. However, the two ends of the L-shaped energy absorption device are fixed and cannot dissipate energy when the column moves sideways; some technical solutions install soft steel energy absorption devices on the four sides of the column base of the square steel column, and dissipate the seismic energy transmitted to the square steel pipe column through the buckling deformation of the soft steel energy absorption device, thereby playing a shock-absorbing role. However, the prevention of re-reset after the soft steel is damaged is not considered.

[0005] The Chinese invention patent with patent publication number CN109898743A discloses a self-resetting L-shaped member connecting the column foot node with an additional replaceable oblique anti-lateral BRB. The self-resetting function is achieved by cooperating with prestressed cables and an articulated base, thereby enhancing the anti-lateral capability and improving the seismic resistance and post-earthquake recovery capability of the structure. However, it does not consider the combined use of existing new energy-consuming materials, and the self-resetting energy-absorbing and shock-absorbing function is relatively poor, making it impossible to provide double insurance. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of the embodiments of the present invention is to provide a self-resetting energy-dissipating square steel tube column base and steel structure to solve the problem that the existing square steel tube column has a single vibration energy dissipation method and cannot effectively reduce shock.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A self-resetting energy-consuming square steel tube column foot, comprising a base and a square steel tube column vertically arranged on the base;

[0009] Energy dissipation devices are provided on both sides of the square steel tube column, and the square steel tube column is connected to the base through the energy dissipation devices; a self-resetting telescopic device is provided on the energy dissipation device, so that the energy dissipation device is driven to bend and deform through the expansion and contraction of the self-resetting telescopic device, thereby dissipating the seismic energy transmitted to the square steel tube column;

[0010] An anchoring tool is sleeved on the square steel pipe column, and the anchoring tool is connected to the base through a prestressed steel strand.

[0011] In some embodiments, the energy dissipation device includes a plurality of connecting portions and a plurality of elastic bending portions; the plurality of connecting portions are arranged at intervals, and adjacent connecting portions are connected by the elastic bending portions;

[0012] The connecting portion and the elastic bending portion connected in sequence form an L-shaped structure.

[0013] In some embodiments, the connecting portion is a first connecting plate, the elastic bending portion includes a plurality of U-shaped bent plates, and an intermediate plate is provided between the U-shaped bent plates.

[0014] In some embodiments, a second connecting plate is provided at the bottom of the energy dissipation device, and a third connecting plate is provided at the top of the energy dissipation device; the energy dissipation device is connected to the self-resetting compression device through the second connecting plate and the third connecting plate;

[0015] An included angle is formed between the self-resetting compression device and the energy dissipation device.

[0016] In some embodiments, the self-resetting telescopic device includes an upper cylinder, a lower cylinder, and a telescopic spring;

[0017] One end of the lower cylinder is hinged to the energy dissipation device, the other end of the lower cylinder extends into the upper cylinder and is slidably connected to the upper cylinder, and one end of the upper cylinder away from the lower cylinder is hinged to the energy dissipation device;

[0018] The telescopic spring is sleeved on the upper cylinder and the lower cylinder, one end of the telescopic spring is connected to the upper cylinder, and the other end of the telescopic spring is connected to the lower cylinder.

[0019] In some embodiments, a first stopper is provided at one end of the lower cylinder, and a second stopper is provided at one end of the upper cylinder away from the lower cylinder.

[0020] In some embodiments, the anchoring fixture includes a first concave plate and a second concave plate connected end to end, and there is an installation space for the square steel pipe column between the first concave plate and the second concave plate;

[0021] One end of the prestressed steel strand is anchored to the first concave plate or the second concave plate, and the other end of the prestressed steel strand is arranged on the base.

[0022] In some embodiments, the energy dissipation device and the self-resetting compression device are located below the anchoring tool.

[0023] In some embodiments, the energy dissipation device is made of LYP steel, and the yield strength of the energy dissipation device is 75 MPa to 300 MPa.

[0024] The present invention also provides a steel structure;

[0025] A steel structure comprises the above-mentioned self-resetting energy-dissipating square steel tube column base.

[0026] One or more technical solutions provided by the present invention have at least the following technical effects or advantages:

[0027] 1. The technical solution provided by the present invention is to install energy dissipation devices on both sides of the column foot of the square steel tube column, and install a self-resetting compression device on the energy dissipation device; the vertical energy dissipation device is driven to stretch and compress through the movement of the square steel tube column, and the energy dissipation device is driven to buckle and deform through the stretching and compression of the self-resetting expansion and contraction device to dissipate the seismic energy transmitted to the square steel tube column, thereby playing a shock-absorbing role.

[0028] 2. The technical solution provided by the present invention is that when the column foot of the square steel pipe column turns a corner, the prestressed steel strands generate cable force on the square steel pipe column, so that the column foot with the corner will be pulled to its original position, realizing the self-resetting function; combined with the energy dissipation device and the self-resetting compression device, it has a double insurance effect, greatly reducing the difficulty and cost of post-earthquake repair.

[0029] 3. The technical solution provided by the present invention is that the energy dissipation device is a low-yield point LYP steel component with a yield strength range of 175MPa-300MPa. Compared with rubber materials, it has the advantages of good ductility and strong fatigue resistance, and has a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0031] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0032] Figure 2 1 is a schematic structural diagram of a self-resetting telescopic device provided by an embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of a mild steel energy dissipation device provided in an embodiment of the present invention;

[0034] Figure 4 Schematic diagram of the structure of the prestressed tooling provided by an embodiment of the present invention;

[0035] In the figure: 1. Square steel pipe column; 2. Base; 2.1. First prestressed hole; 3. Anchoring tool; 3.1. First concave plate; 3.2. Second concave plate; 3.3. Second prestressed hole; 4. Energy dissipation device; 4.1. Connecting part; 4.2. Elastic bending part; 4.2.1. U-shaped bent plate; 4.2.2. Middle plate; 5. Self-resetting telescopic device; 5.1. Lower cylinder; 5.1.1. First stopper; 5.2. Upper cylinder; 5.2.1. Second stopper; 5.3. Telescopic spring; 6. Prestressed steel strand; 7. Prestressed anchor; 8. Second connecting plate; 9. Third connecting plate; 10. Connector; 11. High-strength bolt; 12. First hinge point; 13. Second hinge point.

[0036] In order to show the positions of various parts, the distances or sizes between them are exaggerated. The schematic diagram is for reference only. DETAILED DESCRIPTION

[0037] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0038] Explanation of terms:

[0039] Column base: The part of a building structure that connects the column to the foundation. Its function is to transfer the load of the superstructure to the foundation and to withstand external loads such as earthquake forces and wind forces.

[0040] Example 1

[0041] As introduced in the background technology, the square steel pipe column 1 in the existing technology can only reduce the seismic energy when the square steel pipe column 1 moves sideways in a single direction, and the self-resetting shock-absorbing performance is poor. In order to solve the above technical problems, the present invention proposes a self-resetting energy-absorbing square steel pipe column foot, which combines the energy dissipation device 4, the self-resetting telescopic device 5 and the anchoring tool 3, and utilizes the tension and compression of the energy dissipation device 4, the tension and compression of the self-resetting compression device and the cable force generated by the anchoring tool 3 to reduce the seismic energy generated during an earthquake.

[0042] Combine Figures 1-4The self-resetting energy-absorbing square steel pipe column foot comprises a seat and a square steel pipe column 1 vertically mounted on the base 2. Energy-absorbing devices 4 are respectively mounted on both sides of the square steel pipe column 1. The energy-absorbing device 4 is an L-shaped structure. Its vertical portion is mounted on the square steel pipe column 1 through high-strength bolts 11, and its horizontal portion is mounted on the base 2 through high-strength bolts 11, thereby realizing the connection between the square steel pipe column 1 and the base 2. If the square steel pipe column 1 moves, the seismic energy transmitted to the square steel pipe column 1 can be dissipated through the tension and compression of the energy-absorbing device 4. A self-resetting telescopic device 5 is installed on the energy-absorbing device 4. The lower end of the self-resetting telescopic device 5 is hinged to the horizontal part of the energy dissipation device 4 through the first stop block 5.1.1, and the upper end of the self-resetting telescopic device 5 is hinged to the vertical part of the energy dissipation device 4 through the second stop block 5.2.1, so that the energy dissipation device 4 is driven to bend and deform through the expansion and contraction of the self-resetting telescopic device 5, thereby dissipating the seismic energy transmitted to the square steel pipe column 1; the square steel pipe column 1 is provided with an anchoring tool 3, which is connected to the base 2 through a prestressed steel strand 6. The cable force of the prestressed steel strand 6 can pull the square steel pipe column 1 that has generated a corner back to its original position.

[0043] Furthermore, the energy dissipation device 4 includes multiple connecting parts 4.1 and multiple elastic bending parts 4.2; the multiple connecting parts 4.1 are arranged at intervals, and adjacent connecting parts 4.1 are connected by elastic bending parts 4.2; the connecting parts 4.1 and elastic bending parts 4.2 connected in sequence form an L-shaped structure.

[0044] In this embodiment, the connecting portion 4.1 is a first connecting plate, the elastic bending portion 4.2 includes a plurality of U-shaped bent plates 4.2.1, and a horizontally arranged intermediate plate 4.2.2 is connected between adjacent U-shaped bent plates 4.2.1; the energy dissipation device 4 is made of LYP steel, which is a low-yield point LYP steel component with a yield strength range of 175MPa-300MPa.

[0045] Based on this, when the square steel pipe column 1 moves, the seismic energy transmitted to the square steel pipe column 1 can be dissipated through the tension and compression of the energy dissipation device 4. At the same time, based on the characteristics of low yield point LYP steel components with good ductility and strong fatigue resistance, its energy dissipation effect is good and its service life is long.

[0046] In addition, the other steel components in the self-resetting energy-consuming square steel tube column base described in this embodiment are made of Q355B steel.

[0047] Specifically, such as Figure 3As shown, the energy dissipation device 4 includes three connecting parts 4.1 and two elastic bending parts 4.2. The elastic bending part 4.2 includes two U-shaped bent plates 4.2.1, and a horizontally arranged intermediate plate 4.2.2 is connected between the two U-shaped bent plates 4.2.1; the connecting parts 4.1 and the elastic bending parts 4.2 are connected end to end in sequence, the first connecting part 4.1, the first elastic bending part 4.2 and the second connecting part 4.1 form the horizontal part of the energy dissipation device 4, and the second elastic bending part 4.2 and the third connecting part 4.1 form the vertical part of the energy dissipation device 4; the intermediate plate 4.2.2 of the first elastic bending part 4.2 is installed with a second connecting plate 8 for hinged connection with the self-resetting compression device, and the third connecting part 4.1 is installed with a third connecting plate 9 for hinged connection with the self-resetting compression device.

[0048] Further, combined Figure 2 1 and the second hinge point 13 on the third connecting plate 9 is hinged to each other, so that a certain angle is formed between the self-resetting compression device 5 and the energy dissipation device 4.

[0049] With the cooperation of the lower cylinder 5.1, the upper cylinder 5.2 and the telescopic spring 5.3, tension and compression can be achieved, thereby driving the buckling deformation of the horizontal energy dissipation device 4 and dissipating the seismic energy transmitted to the square steel pipe column 1.

[0050] Further, such as Figure 4As shown, the anchoring tooling 3 includes a first concave plate 3.1 and a second concave plate 3.2 connected end to end, the connection between the first concave plate 3.1 and the second concave plate 3.2 is fixed by a connecting piece 10, and there is an installation space for the square steel pipe column 1 between the first concave plate 3.1 and the second concave plate 3.2; prestressed steel strands 6 are symmetrically installed on the first concave plate 3.1 and the second concave plate 3.2, one end of the prestressed steel strand 6 passes through the second prestressed hole 3.3 opened on the first concave plate 3.1 or the second concave plate 3.2, and is anchored to the first concave plate 3.1 or the second concave plate 3.2, and the other end of the prestressed steel strand 6 passes through the first prestressed hole 2.1 opened on the base 2 and is pre-buried inside the base 2; at the same time, the first concave plate 3.1 and the second concave plate 3.2 are located above the self-resetting telescopic device 5 and the energy dissipation device 4, which play a certain protective role for them.

[0051] Specifically, four first prestressed holes 2.1 are provided on the base 2, and corresponding second prestressed holes 3.3 are provided on the first concave plate 3.1 and the second concave plate 3.2. One end of the prestressed steel strand 6 passes through the second prestressed hole 3.3 and the prestressed anchor 7, and is installed on the first concave plate 3.1 or the second concave plate 3.2 through the prestressed anchor 7. The other end of the prestressed steel strand 6 passes through the first prestressed hole 2.1 and is pre-buried in the base 2 to dissipate the energy of the earthquake and achieve self-reset effect after the earthquake.

[0052] Next, the construction steps of the self-resetting energy-dissipating square steel tube column foot described in this embodiment are further described. The specific process is as follows:

[0053] Step 1: Process and manufacture each component according to design requirements.

[0054] Step 2: Connect the lower cylinder 5.1, the upper cylinder 5.2 and the telescopic spring 5.3 to form a self-resetting telescopic device 5.

[0055] Step 3: Connect the energy dissipation device 4 to the base 2 and the square steel pipe column 1 through the connecting portion 4.1 and the third connecting plate 9 respectively, and fix them with high-strength bolts 11.

[0056] Step 4: Connect the self-resetting telescopic device 5 to the energy dissipation device 4 through the high-strength bolts 11, the first hinge point 12, and the second hinge point 13.

[0057] Step 5: Connect the anchoring fixture 3 to the square steel pipe column 1 through the connector 10 and the high-strength bolts 11.

[0058] Step 6: Pass the prestressed steel strand 6 through the first prestressed hole 2.1 on the base 2 and the second prestressed hole 3.3 on the anchoring tool 3, and anchor it on the anchoring tool 3 through the prestressed anchor 7. The other end passes through the first prestressed hole 2.1 and is embedded in the base 2 to form a complete self-resetting energy-consuming square steel pipe column foot device.

[0059] Example 2

[0060] Based on the self-resetting and energy-absorbing square steel tube column foot described in the above embodiment 1, this embodiment also provides a steel structure, in which the self-resetting and energy-absorbing square steel tube column foot described in the above embodiment is provided. Since the above self-resetting and energy-absorbing square steel tube column foot has the above technical effect, please refer to the above embodiment for the technical effect of the steel structure using the self-resetting and energy-absorbing square steel tube column foot.

[0061] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A self-resetting energy-consuming square steel tube column foot, characterized in that: It comprises a base and a square steel pipe column vertically arranged on the base; Energy dissipation devices are respectively arranged on both sides of the square steel pipe column, and the square steel pipe column is connected to the base through the energy dissipation devices; a self-resetting telescopic device is arranged on the energy dissipation device, so that the energy dissipation device is driven to bend and deform through the telescopic movement of the self-resetting telescopic device, thereby dissipating the seismic energy transmitted to the square steel pipe column; An anchoring tool is sleeved on the square steel pipe column, and the anchoring tool is connected to the base through a prestressed steel strand.

2. The self-resetting energy-dissipating square steel tube column base according to claim 1, characterized in that: The energy dissipation device comprises a plurality of connection parts and a plurality of elastic bending parts; the plurality of connection parts are arranged at intervals, and adjacent connection parts are connected by the elastic bending parts; The connecting portion and the elastic bending portion connected in sequence form an L-shaped structure.

3. The self-resetting energy-dissipating square steel tube column base according to claim 2, characterized in that: The connecting portion is a first connecting plate, the elastic bending portion includes a plurality of U-shaped bent plates, and an intermediate plate is arranged between the U-shaped bent plates.

4. The self-resetting energy-dissipating square steel tube column base according to claim 1, characterized in that: A second connecting plate is provided at the bottom of the energy dissipation device, and a third connecting plate is provided at the top of the energy dissipation device; the energy dissipation device is connected to the self-resetting compression device through the second connecting plate and the third connecting plate; An angle is formed between the self-resetting compression device and the energy dissipation device.

5. The self-resetting energy-dissipating square steel tube column base according to claim 1, characterized in that: The self-resetting telescopic device comprises an upper cylinder, a lower cylinder and a telescopic spring; One end of the lower cylinder is hinged to the energy dissipation device, the other end of the lower cylinder extends into the upper cylinder and is slidably connected to the upper cylinder, and one end of the upper cylinder away from the lower cylinder is hinged to the energy dissipation device; The telescopic spring is sleeved on the upper cylinder and the lower cylinder, one end of the telescopic spring is connected to the upper cylinder, and the other end of the telescopic spring is connected to the lower cylinder.

6. The self-resetting energy-dissipating square steel tube column base according to claim 5, characterized in that: A first stopper is disposed at one end of the lower cylinder, and a second stopper is disposed at one end of the upper cylinder away from the lower cylinder.

7. The self-resetting energy-dissipating square steel tube column base according to claim 1, characterized in that: The anchoring fixture comprises a first concave plate and a second concave plate connected end to end, and there is an installation space for a square steel pipe column between the first concave plate and the second concave plate; One end of the prestressed steel strand is anchored to the first concave plate or the second concave plate, and the other end of the prestressed steel strand is arranged on the base.

8. The self-resetting energy-dissipating square steel tube column base according to claim 1, characterized in that: The energy dissipation device and the self-resetting compression device are located below the anchoring tooling.

9. The self-resetting energy-dissipating square steel tube column base according to claim 1, characterized in that: The energy dissipation device is made of LYP steel, and the yield strength of the energy dissipation device is 75 MPa to 300 MPa.

10. A steel structure, characterized in that: The invention comprises the self-resetting energy-absorbing square steel tube column base as described in any one of claims 1 to 9.

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