Steel pipe damper and construction method

Abstract

The steel pipe damper comprises a concave connecting plate and an energy dissipation steel pipe, the concave connecting plate comprises an upper concave connecting plate body and a lower concave connecting plate body, the two ends of the energy dissipation steel pipe are fixedly connected with the upper concave connecting plate body and the lower concave connecting plate body respectively, and the energy dissipation steel pipe comprises an outer-layer energy dissipation steel pipe body and an inner-layer energy dissipation steel pipe body; a rubber pad is arranged between the outer-layer energy dissipation steel pipe and the inner-layer energy dissipation steel pipe; the steel pipe damper further comprises two reinforcing steel pipes, and the two reinforcing steel pipes are located at the two ends of the inner wall of the inner-layer energy dissipation steel pipe correspondingly and fixedly connected with the concave connecting plate. Compared with the prior art, the device has the advantages that the energy dissipation effect of an energy dissipation steel pipe material is fully utilized, the structure is simple, the plastic deformation capacity is good, and the hysteretic energy dissipation performance is excellent.

Description

Technical Field

[0001] The invention relates to a construction engineering shock absorbing device, in particular to a steel pipe damper and a construction method thereof. Background Art

[0002] Earthquakes, as one of the natural disasters, pose a great threat to human survival and development, and the direct and indirect losses caused are difficult to estimate. The steel tube damper is a damper that uses the shear deformation of energy-absorbing steel tubes to dissipate earthquake energy. It is generally installed in non-load-bearing structural parts. The damper deforms and dissipates energy to preserve the main structure, which enhances the shock absorption performance of the house and achieves the function of post-earthquake recovery. It has the characteristics of simple manufacturing and installation and excellent energy dissipation performance. The failure position of the steel tube damper appears at the connection between the steel tube and the connecting plate, that is, the end of the steel tube damper, which causes the steel tube damper to exit work prematurely and the energy dissipation performance of the steel is not fully utilized.

[0003] Patent KR20140022250A discloses a round steel tube damper, in which the upper end of the damping steel tube is non-fixedly connected to the damper upper cover, and the lower end is threadedly connected to the damper lower cover. The damper is easily damaged first at the connection, and there is much room for improvement in the energy consumption effect. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a steel tube damper and a construction method that can fully utilize the energy dissipation performance of steel.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] According to one aspect of the present invention, a steel tube damper is provided, comprising a concave connecting plate and an energy-absorbing steel tube, the concave connecting plate comprising an upper concave connecting plate and a lower concave connecting plate, the two ends of the energy-absorbing steel tube being fixedly connected to the upper concave connecting plate and the lower concave connecting plate respectively, and characterized in that the energy-absorbing steel tube comprises an outer energy-absorbing steel tube and an inner energy-absorbing steel tube, and a rubber pad is provided between the outer energy-absorbing steel tube and the inner energy-absorbing steel tube; the steel tube damper also comprises a plurality of reinforcing steel tubes, which are located at the upper and lower ends of the inner wall of the inner energy-absorbing steel tube, and are fixedly connected to the concave connecting plate.

[0007] Furthermore, the reinforcing steel pipe is embedded in the concave connecting plate and welded by fillet welding. The two ends of the energy-absorbing steel pipe are respectively embedded in the upper concave connecting plate and the lower concave connecting plate, and the outer wall of the energy-absorbing steel pipe and the concave connecting plate are connected by fillet welding. The reinforcing steel pipe is connected to the inner wall of the inner layer of the energy-absorbing steel pipe, and the fillet welding leaves a fillet weld.

[0008] Furthermore, the fillet weld at the connection between the reinforced steel pipe and the concave connecting plate is located on the inner side of the reinforced steel pipe, the fillet weld at the connection between the inner energy-absorbing steel pipe and the concave connecting plate is located on the outer side of the inner energy-absorbing steel pipe, and the fillet weld at the connection between the outer energy-absorbing steel pipe and the concave connecting plate is located on the outer side of the outer energy-absorbing steel pipe.

[0009] Furthermore, the center of the concave connecting plate is a stepped through hole, which includes two circular holes with different diameters. The diameter of the larger circular hole is larger than the outer diameter of the outer energy-absorbing steel pipe, and the diameter of the smaller circular hole is smaller than the inner diameter of the outer energy-absorbing steel pipe. The circular holes with different diameters form an annular boss, and the outer energy-absorbing steel pipe, the inner energy-absorbing steel pipe and the reinforced steel pipe are all embedded in the annular boss.

[0010] Furthermore, the rubber pad is adhered to the outer wall of the inner energy-absorbing steel pipe by glue, and the inner wall of the outer energy-absorbing steel pipe is connected to the outer side of the rubber pad.

[0011] Furthermore, the glue used to stick the rubber pad and the outer wall of the inner energy-absorbing steel pipe is epoxy resin glue.

[0012] Furthermore, bolt holes are distributed on the concave connecting plate, the number of the bolt holes is multiple, and each bolt hole corresponds to a connecting bolt.

[0013] Furthermore, the connecting bolts are friction type high-strength bolts.

[0014] Furthermore, the steel used for the energy-absorbing steel pipe and the reinforced steel pipe is a steel with a cavity inside.

[0015] According to another aspect of the present invention, a method for constructing a steel tube damper is provided, comprising the following steps:

[0016] Embed the reinforcing steel pipe into the lower concave connecting plate and connect the inner wall of the reinforcing steel pipe and the lower concave connecting plate by fillet welding;

[0017] Embed the reinforcing steel pipe into the upper concave connecting plate and connect the inner wall of the reinforcing steel pipe and the upper concave connecting plate by fillet welding;

[0018] The inner energy-absorbing steel pipe is embedded in the lower concave connecting plate and the upper concave connecting plate, and the outer wall of the energy-absorbing steel pipe and the concave connecting plate are connected by fillet welding;

[0019] Clean the outer wall of the inner energy-absorbing steel pipe, and use epoxy resin glue to bond the rubber pad and the outer wall of the inner energy-absorbing steel pipe;

[0020] The outer energy-absorbing steel pipe is embedded in the lower concave connecting plate and the upper concave connecting plate, and the outer wall of the energy-absorbing steel pipe is connected to the concave connecting plate by fillet welding;

[0021] The steel pipe damper and the connected parts are connected by bolts.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The present invention is provided with an inner and outer two-layer energy-absorbing steel pipe with a rubber pad in the middle, and reinforced steel pipes are provided at both ends of the energy-absorbing steel pipe. The reinforced steel pipe increases the strength of both ends of the energy-absorbing steel pipe, so that both ends of the energy-absorbing steel pipe will not be damaged first, thereby making full use of the energy-absorbing effect of the energy-absorbing steel pipe material; the double-layer energy-absorbing steel pipe structure with the rubber pad increases the rigidity of the energy-absorbing steel pipe and strengthens the energy-absorbing capacity of the steel pipe damper; at the same time, the outer layer of the energy-absorbing steel pipe plays a protective role on the inner layer of the energy-absorbing steel pipe;

[0024] 2. The present invention is made of steel pipes, and the bearing capacity and stiffness are flexibly designed. Multiple dampers can be connected in series or in parallel according to needs. The steel pipes have good integrity, which avoids the influence of unstable welding quality on the mechanical properties of the dampers.

[0025] 3. The present invention adopts a full bolt assembly connection method, which is simple in form, easy to disassemble and assemble, and has good post-earthquake recovery. The friction-type high-strength bolts used avoid relative slippage between the steel tube damper and the connected parts, and further improve the energy dissipation capacity of the steel tube damper;

[0026] 4. The present invention has a simple structure, good plastic deformation ability, excellent hysteresis energy dissipation performance and good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the steel tube damper;

[0028] Figure 2 It is a schematic diagram of the main components of the steel tube damper;

[0029] Figure 3 is a schematic diagram of the cross section of a steel tube damper;

[0030] Figure 4 It is a schematic diagram of the distribution plane of steel pipes and rubber pads;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the concave connecting plate;

[0032] Figure 6 This is the wall pier layout diagram of the steel tube damper.

[0033] In the figure, 1. outer energy-absorbing steel pipe, 2. inner energy-absorbing steel pipe, 3. reinforcing steel pipe, 4. rubber pad, 5. upper concave connecting plate, 6. lower concave connecting plate, 7. connecting bolts, 8. bolt holes, 9. fillet weld. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] The present invention is an end-reinforced steel pipe damper, which can be used as a shock-absorbing device for new buildings and can also be used for the reinforcement and reconstruction of existing buildings. It is generally installed in the part where the relative displacement of the structure is large, and adopts a wall pier arrangement, such as Figure 1 shown.

[0036] like Figure 2 As shown, the present invention is mainly composed of an energy-absorbing steel pipe, an upper concave connecting plate 5, a lower concave connecting plate 6 and a connecting bolt 7, wherein each end of the energy-absorbing steel pipe has a reinforcing steel pipe 3 for reinforcement. The two energy-absorbing steel pipes and the two reinforcing steel pipes 3 can be made of Q235 steel, low yield point steel, etc., preferably an international seamless steel pipe with a low yield point and a cavity inside. The energy-absorbing steel pipe is higher than the reinforcing steel pipe and is used to bear the shear load energy consumption.

[0037] like Figure 3 As shown, the energy-absorbing steel pipe includes an outer energy-absorbing steel pipe 1 and an inner energy-absorbing steel pipe 2. When in use, a rubber pad 4 is clamped between the outer energy-absorbing steel pipe 1 and the inner energy-absorbing steel pipe 2. The steel pipe damper connected in this embodiment is as shown in FIG. Figure 4 As shown, in this embodiment, the connection process of the steel pipe damper is described as follows:

[0038] The reinforcing steel pipe 3 is embedded in the lower concave connecting plate 6 and the inner wall of the reinforcing steel pipe 3 is welded by fillet welds, and the reinforcing steel pipe 3 and the upper concave connecting plate 5 are welded in the same way;

[0039] The inner layer energy-absorbing steel pipe 2 is embedded into the reserved gap between the lower concave connecting plate 6 and the upper concave connecting plate 5, and the outer wall of the energy-absorbing steel pipe and the concave connecting plate are welded together by fillet welds 9;

[0040] When the rubber is fixed to the outer wall of the inner energy-consuming steel pipe 2, the outer wall of the inner energy-consuming steel pipe 2 is first cleaned, and then the rubber pad 4 is adhered by glue. The distribution form of the steel pipe and the rubber pad 4 is as follows: Figure 5 As shown;

[0041] The rubber pad 4 is fixed to the outer wall of the inner energy-absorbing steel pipe 2, and then the outer energy-absorbing steel pipe 1 is embedded in the reserved gap between the lower concave connecting plate 6 and the upper concave connecting plate 5, and the outer wall of the energy-absorbing steel pipe and the concave connecting plate are welded and connected by fillet welds 9.

[0042] As a preferred embodiment, the upper concave connecting plate 5 and the lower concave connecting plate 6 are both made of Q345 steel plates, and both have reserved bolt holes. The diameter and spacing of the bolt holes are calculated by actual engineering, such as Figure 6 shown.

[0043] As a preferred embodiment, the glue used to fix the rubber pad 4 to the outer wall of the inner energy dissipation steel pipe 2 is epoxy resin glue. Epoxy resin glue has good bonding properties to common metal substrates, is suitable for rapid bonding of most metals, plastics or elastomer materials, is transparent and toughened, and is particularly suitable for occasions requiring elastic bonding. These glues can meet the daily needs for metal-to-metal bonding, rubber-to-metal bonding, and plastic bonding.

[0044] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A steel pipe damper, comprising a concave connecting plate and an energy-absorbing steel pipe, wherein the concave connecting plate comprises an upper concave connecting plate (5) and a lower concave connecting plate (6), and both ends of the energy-absorbing steel pipe are fixedly connected to the upper concave connecting plate (5) and the lower concave connecting plate (6), respectively. It is characterized in that The energy-absorbing steel pipe comprises an outer energy-absorbing steel pipe (1) and an inner energy-absorbing steel pipe (2), and a rubber pad (4) is provided between the outer energy-absorbing steel pipe (1) and the inner energy-absorbing steel pipe (2); the steel pipe damper also comprises a plurality of reinforcing steel pipes (3), which are located at the upper and lower ends of the inner wall of the inner energy-absorbing steel pipe (2) and are fixedly connected to the concave connecting plate.

2. A steel tube damper according to claim 1, It is characterized in that The reinforcing steel pipe (3) is embedded in the concave connecting plate and welded by fillet welding. The two ends of the energy-absorbing steel pipe are respectively embedded in the upper concave connecting plate (5) and the lower concave connecting plate (6). The outer wall of the energy-absorbing steel pipe and the concave connecting plate are connected by fillet welding. The reinforcing steel pipe (3) is connected to the inner wall of the inner layer energy-absorbing steel pipe (2). The fillet welding leaves a fillet weld (9).

3. A steel tube damper according to claim 2, It is characterized in that The fillet weld (9) at the connection between the reinforcing steel pipe (3) and the concave connecting plate is located on the inner side of the reinforcing steel pipe (3), the fillet weld (9) at the connection between the inner energy-absorbing steel pipe (2) and the concave connecting plate is located on the outer side of the inner energy-absorbing steel pipe (2), and the fillet weld (9) at the connection between the outer energy-absorbing steel pipe (1) and the concave connecting plate is located on the outer side of the outer energy-absorbing steel pipe (1).

4. A steel tube damper according to claim 2, It is characterized in that The center of the concave connecting plate is a stepped through hole, and the stepped through hole includes two circular holes with different diameters, the diameter of the larger circular hole is larger than the outer diameter of the outer energy-absorbing steel pipe (1), and the diameter of the smaller circular hole is smaller than the inner diameter of the outer energy-absorbing steel pipe (1). The circular holes with different diameters form an annular boss, and the outer energy-absorbing steel pipe (1), the inner energy-absorbing steel pipe (2) and the reinforcing steel pipe (3) are all embedded in the annular boss.

5. The steel tube damper according to claim 1, It is characterized in that The rubber pad (4) is glued to the outer wall of the inner energy-absorbing steel pipe (2), and the inner wall of the outer energy-absorbing steel pipe (1) is connected to the outer side of the rubber pad (4).

6. The steel tube damper according to claim 1, It is characterized in that The glue used to stick the rubber pad (4) and the outer wall of the inner energy-absorbing steel pipe (2) is epoxy resin glue.

7. The steel tube damper according to claim 1, It is characterized in that Bolt holes (8) are distributed on the concave connecting plate. There are a plurality of bolt holes (8), and each bolt hole (8) corresponds to a connecting bolt (7).

8. A steel tube damper according to claim 7, It is characterized in that The connecting bolts (7) are friction-type high-strength bolts.

9. The steel tube damper according to claim 1, It is characterized in that The steel material used for the energy-consuming steel pipe and the reinforcing steel pipe (3) is steel material with a cavity inside.

10. A method for constructing a steel tube damper according to any one of claims 1 to 9, It is characterized in that The following steps are involved: The reinforcing steel pipe (3) is embedded in the lower concave connecting plate (6) and the inner wall of the reinforcing steel pipe (3) and the lower concave connecting plate (6) are connected by fillet welding; Embedding the reinforcing steel pipe (3) into the upper concave connecting plate (5) and connecting the inner wall of the reinforcing steel pipe (3) and the upper concave connecting plate (5) by fillet welding; The inner layer energy-absorbing steel pipe (2) is embedded in the lower concave connecting plate (6) and the upper concave connecting plate (6), and the outer wall of the energy-absorbing steel pipe and the concave connecting plate are welded and connected by fillet welds (9); Clean the outer wall of the inner energy-absorbing steel pipe (2), and use epoxy resin glue to adhere the rubber pad (4) and the outer wall of the inner energy-absorbing steel pipe (2); The outer energy-absorbing steel pipe (1) is embedded in the lower concave connecting plate (6) and the upper concave connecting plate (6), and the outer wall of the energy-absorbing steel pipe is connected to the concave connecting plate by fillet welding; The steel pipe damper and the connected parts are connected by bolts.

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