Fabricated corrosion-resistant second-order friction damper

Abstract

The invention relates to an assembly type corrosion-resistant second-order friction damper, and belongs to the civil engineering industry. The invention discloses an assembled corrosion-resistant second-order friction damper. The second-order friction damper comprises a fixed end frame, a cover plate, a tempered glass plate, a channel steel pressing plate, a low-friction-coefficient plate, a high-friction-coefficient plate, a sliding plate, an end plate, a bolt and a fixed end mounting plate, the fixed end frame and the cover plate are connected through bolts to form a rectangular box body with only one open end, and the sliding plate drives the low-friction-coefficient plate and the high-friction-coefficient plate to rub with the channel steel pressing plate in the box body. Aiming at the current situation that most of the existing friction dampers are first-order friction dampers with single friction coefficients and cannot well adapt to different earthquake action conditions, the invention provides the assembled and corrosion-resistant second-order friction damper which is convenient to mount, dismount and replace and high in practicability. And moreover, the situation can be observed in real time through the tempered glass plate, and the visual function is achieved.

Description

Technical Field

[0001] The invention relates to an assembled, corrosion-resistant second-order friction damper, belonging to the civil engineering industry Background Art

[0002] Earthquakes are a common natural disaster in life. They are very sudden and destructive, and pose a great threat to people's property and life safety. Adding friction dampers to building structures can consume earthquake energy, thereby reducing the damage to the main structure. It is an effective method of energy dissipation and shock reduction. Friction dampers play a very important role in shock reduction.

[0003] Earthquakes are classified into frequent earthquakes, fortified earthquakes, and rare earthquakes. Only when the friction damper matches the corresponding energy dissipation capacity under different earthquakes can the shock absorption effect on the building structure be maximized. However, most of the existing friction dampers are first-order friction dampers with a single friction coefficient, which cannot meet the requirements for energy dissipation capacity under frequent and rare earthquakes, and the energy dissipation capacity cannot change with the change of earthquake action. Therefore, it is very important to study a multifunctional, multi-order energy dissipation friction damper. Summary of the invention

[0004] In view of the above problems, the present invention provides an assembled, corrosion-resistant second-order friction damper.

[0005] The present invention adopts the following technical solution:

[0006] The present invention discloses an assembled, corrosion-resistant second-order friction damper, which includes a fixed end frame, a cover plate, a tempered glass plate, a channel steel pressure plate, a low friction coefficient plate, a high friction coefficient plate, a sliding plate, an end plate, bolts, and a fixed end mounting plate; the fixed end frame and the cover plate are connected by bolts to form a rectangular box with only one end open, and the sliding plate drives the low friction coefficient plate and the high friction coefficient plate to rub against the channel steel pressure plate in the box.

[0007] The present invention describes an assembled, corrosion-resistant second-order friction damper, wherein the fixed end frame is a concave structure formed by welding three rectangular steel plates, and two stiffening plates are arranged at the connecting corners of the steel plates. The upper and lower steel plates of the fixed end frame are both provided with bolt holes for connection with the channel steel pressure plate, and the lateral steel plates of the fixed end frame are connected with the fixed end mounting plate.

[0008] The invention discloses an assembled, corrosion-resistant second-order friction damper, wherein the cover plate is a rectangular steel plate with a rectangular hole in the middle and a transparent tempered glass plate installed therein, and is connected to a fixed end frame by bolts to form a rectangular box body with one end open.

[0009] The present invention discloses an assembled, corrosion-resistant second-order friction damper, wherein the channel steel pressure plate has bolt holes on the upper and lower flanges of the channel steel respectively and is connected and fixed to a fixed end frame, and the side plate of the channel steel pressure plate has bolt holes connected to the channel steel pressure plate on the other side of the fixed end frame.

[0010] The invention discloses an assembled, corrosion-resistant second-order friction damper, wherein the low friction coefficient plate is a rectangular plate with two through grooves, which is pasted on both sides of the sliding plate and has a friction coefficient lower than that of the high friction coefficient plate.

[0011] The invention discloses an assembled, corrosion-resistant second-order friction damper, wherein the high friction coefficient plate is a rectangular plate with two slots, which is pasted on both sides of the sliding plate and has a friction coefficient greater than that of the low friction coefficient plate.

[0012] The present invention discloses an assembled, corrosion-resistant second-order friction damper, wherein the sliding plate is a rectangular plate with two slots formed therein and connected to the end plate.

[0013] The invention discloses an assembled, corrosion-resistant second-order friction damper, wherein the end plate is connected to the sliding plate, and four stiffening plates are arranged at the connection to increase the rigidity and local stability.

[0014] The present invention discloses an assembled, corrosion-resistant second-order friction damper, wherein the tempered glass plate is a rectangular plate embedded in a hole in the middle of a cover plate, and the internal situation can be observed from the outside through the tempered glass plate.

[0015] The installation method of the assembled, corrosion-resistant second-order friction damper described in the present invention is as follows:

[0016] 1) Align the screw holes on the upper and lower flanges of the two channel steel pressure plates with the screw holes on the upper and lower steel plates of the fixed end frame, and fix them with bolts;

[0017] 2) Align the slots of the low friction coefficient plate and the high friction coefficient plate with the sliding plate and stick them together to form a whole, then insert them into the gap between the two channel steel pressure plate side plates so that the middle position of the low friction coefficient plate coincides with the middle position of the channel steel pressure plate, which is the initial position of the friction plate and the sliding plate as a whole;

[0018] 3) Align the slots of the friction plate and the sliding plate as a whole with the screw holes of the side plate of the channel steel pressure plate, fix them with bolts, and apply the designed preload force to the bolts;

[0019] 4) Align the screw holes of the cover plate with the screw holes on the side of the fixed end frame, rotate the bolts to fix, and assemble to form a semi-sealed box structure with only one end open to complete the installation.

[0020] The working mode of the assembled, corrosion-resistant second-order friction damper described in the present invention is as follows:

[0021] 1) In the initial stage, the middle position of the low friction coefficient plate coincides with the middle position of the channel steel pressure plate, which is the starting position of the second-order friction damper;

[0022] 2) Since the friction coefficient of the low friction coefficient plate is smaller than that of the high friction coefficient plate, the maximum static friction force at the low friction coefficient plate is smaller than that at the high friction coefficient plate. When the force generated by the earthquake is greater than the maximum static friction force at the low friction coefficient plate but less than the maximum static friction force at the high friction coefficient plate, the sliding plate and the friction plate as a whole can only slide back and forth within the range of the low friction coefficient plate, and cannot continue to slide toward the high friction coefficient plate, which is called the first-order energy dissipation state;

[0023] 3) When the force generated by the earthquake is greater than the maximum static friction force at both the low friction coefficient plate and the high friction coefficient plate, the sliding plate and the friction plate as a whole slide to the edge of the low friction coefficient plate and then continue to slide toward the high friction coefficient plate. At this time, the low friction coefficient plate and the high friction coefficient plate work together, and the energy dissipation capacity is improved, which is called the second-order energy dissipation state;

[0024] Beneficial Effects

[0025] In view of the fact that most existing friction dampers are first-order friction dampers with a single friction coefficient and cannot adapt well to different earthquake action conditions, the present invention provides an assembled, corrosion-resistant second-order friction damper, which is easy to install, disassemble and replace. The sealing of its structure has a certain anti-corrosion ability. The tempered glass plate on the cover plate can observe the internal condition of the friction damper in real time. It is a friction damper integrating multiple functions and can meet different needs in engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 is an exploded view of the present invention;

[0028] Figure 3 It is a structural cross-sectional view of the present invention;

[0029] In the figure: 1-fixed end frame; 2-cover plate; 3-bolts; 4-channel steel pressure plate; 5-high friction coefficient plate; 6-sliding plate; 7-end plate; 8-low friction coefficient plate; 9-tempered glass plate; 10-fixed end mounting plate; 11-nuts. DETAILED DESCRIPTION

[0030] In order to make the purpose and technical solution of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1 , Figure 2 As shown: an assembled, corrosion-resistant second-order friction damper includes a fixed end frame 1, a cover plate 2, a tempered glass plate 9, a channel steel pressure plate 4, a low friction coefficient plate 8, a high friction coefficient plate 5, a sliding plate 6, an end plate 7, bolts 3, a fixed end mounting plate 10, and nuts 11; the fixed end frame 1 and the cover plate 2 are connected by bolts to form a rectangular box with only one end open, and the sliding plate 6 drives the low friction coefficient plate 8 and the high friction coefficient plate 5 to rub against the channel steel pressure plate 4 in the box.

[0032] The fixed end frame 1 is a concave structure formed by welding three rectangular steel plates, and two stiffening plates are arranged at the connecting corners of the steel plates. The upper and lower steel plates of the fixed end frame 1 are both provided with bolt holes for connecting with the channel steel pressure plate 4, and the lateral steel plate is connected with the fixed end mounting plate 10.

[0033] The cover plate 2 is a rectangular steel plate with a rectangular hole in the middle and a transparent tempered glass plate 9 installed thereon. The cover plate 2 is connected to the fixed end frame 1 by bolts to form a rectangular box body with one end open.

[0034] The channel steel pressure plate 4 is formed by respectively opening bolt holes on the upper and lower flanges of the channel steel and connected to the fixed end frame 1 , and the side plate is formed by opening bolt holes and connected to the channel steel pressure plate 4 on the other side of the fixed end frame 1 .

[0035] The tempered glass plate 9 is a rectangular plate, embedded in the hole in the middle of the cover plate 2, and the internal situation can be observed from the outside through the tempered glass plate 9

[0036] like Figure 3 As shown, the low friction coefficient plate 8 is a rectangular plate with two through grooves, which is pasted on both sides of the sliding plate 6 and has a friction coefficient lower than that of the high friction coefficient plate 5.

[0037] The high friction coefficient plate 5 is a rectangular plate with two slots, which is pasted on both sides of the sliding plate 6 and has a friction coefficient greater than that of the low friction coefficient plate 8 .

[0038] The sliding plate 6 is a rectangular plate with two slots, and is connected to the end plate 7 .

[0039] The end plate 7 is a rectangular plate, which is connected to the sliding plate 6. Four stiffening plates are arranged at the connection to increase rigidity and local stability.

[0040] An assembled, corrosion-resistant second-order friction damper, the installation method is as follows:

[0041] 1) Align the screw holes on the upper and lower flanges of the two channel steel pressure plates 4 with the screw holes on the upper and lower steel plates of the fixed end frame, and fix them with bolts;

[0042] 2) Align the slots of the low friction coefficient plate 8 with the high friction coefficient plate 5 and the sliding plate 6 and stick them together to form a whole, then insert it into the gap between the two side plates of the channel steel pressing plate 4 so that the middle position of the low friction coefficient plate 8 coincides with the middle position of the channel steel pressing plate 4, which is the initial position of the friction plate and the sliding plate 6 as a whole;

[0043] 3) Align the slots of the friction plate and the sliding plate 6 as a whole with the screw holes of the side plate of the channel steel pressure plate, fix them with bolts 3, and apply the designed pre-tightening force to the bolts 3;

[0044] 4) Align the screw holes of the cover plate 2 with the screw holes on the side of the fixed end frame 1, rotate the bolts 3 to fix, and assemble to form a semi-sealed box structure with only one end open.

[0045] An assembled, corrosion-resistant second-order friction damper, the working method is as follows:

[0046] 1) In the initial stage, the middle position of the low friction coefficient plate coincides with the middle position of the channel steel pressure plate 4, which is the starting position of the second-order friction damper;

[0047] 2) Since the friction coefficient of the low friction coefficient plate 8 is smaller than that of the high friction coefficient plate 5, the maximum static friction force at the low friction coefficient plate 8 is smaller than the maximum static friction force at the high friction coefficient plate 5. When the force generated by the earthquake is greater than the maximum static friction force at the low friction coefficient plate 8 but less than the maximum static friction force at the high friction coefficient plate 5, the sliding plate and the friction plate as a whole can only slide back and forth within the range of the low friction coefficient plate 8, and cannot continue to slide toward the high friction coefficient plate 5, which is called the first-order energy dissipation state;

[0048] 3) When the force generated by the earthquake is greater than the maximum static friction force of the low friction coefficient plate 8 and the high friction coefficient plate, the sliding plate and the friction plate as a whole slide to the edge of the low friction coefficient plate 8 and continue to slide toward the high friction coefficient plate 5. At this time, the low friction coefficient plate 8 and the high friction coefficient plate 5 work together, and the energy dissipation capacity is improved, which is called the second-order energy dissipation state.

[0049] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An assembled, corrosion-resistant second-order friction damper, characterized in that: The second-order friction damper comprises a fixed end frame (1), a cover plate (2), a tempered glass plate (9), a channel steel pressure plate (4), a low friction coefficient plate (8), a high friction coefficient plate (5), a sliding plate (6), an end plate (7), bolts (3), a fixed end mounting plate (10), and nuts (11); the fixed end frame (1) and the cover plate (2) are connected by bolts (3) to form a rectangular box body with only one end open, and the sliding plate (6) drives the low friction coefficient plate (8) and the high friction coefficient plate (5) to rub against the channel steel pressure plate (4) in the box body.

2. The assembled, corrosion-resistant second-order friction damper according to claim 1, characterized in that: The fixed end frame (1) is a concave structure formed by welding three rectangular steel plates, and two stiffening plates are arranged at the connecting corners of the steel plates. The upper and lower steel plates of the fixed end frame (1) are both provided with bolt (3) holes for connecting with the channel steel pressure plate (4), and the lateral steel plates of the fixed end frame (1) are connected with the fixed end mounting plate (10).

3. The assembled, corrosion-resistant second-order friction damper according to claim 1, characterized in that: The cover plate (2) is a rectangular steel plate with a rectangular hole in the middle and a transparent tempered glass plate (9) installed thereon. It is connected to the fixed end frame (1) by bolts (3) to form a rectangular box body with one end open.

4. The assembled, corrosion-resistant second-order friction damper according to claim 1, characterized in that: The channel steel pressure plate (4) is a channel steel having upper and lower flanges respectively provided with bolt (3) holes for connection and fixing with the fixed end frame (1), and the side plate of the channel steel pressure plate (4) is provided with bolt (3) holes for connection with the channel steel pressure plate (4) on the other side of the fixed end frame (1).

5. The assembled, corrosion-resistant second-order friction damper according to claim 1, characterized in that: The low friction coefficient plate (8) is a rectangular plate with two through grooves, which is pasted on both sides of the sliding plate (6) and has a friction coefficient lower than that of the high friction coefficient plate (5).

6. The assembled, corrosion-resistant second-order friction damper according to claim 1, characterized in that: The high friction coefficient plate (5) is a rectangular plate with two slots, which is pasted on both sides of the sliding plate (6) and has a friction coefficient greater than that of the low friction coefficient plate (8).

7. The assembled, corrosion-resistant second-order friction damper according to claim 1, characterized in that: The sliding plate (6) is a rectangular plate with two slots, and is connected to the end plate (7).

8. The assembled, corrosion-resistant second-order friction damper according to claim 1, characterized in that: The end plate (7) is connected to the sliding plate (6), and four stiffening plates are arranged at the connection to increase rigidity and local stability.

9. The assembled, corrosion-resistant second-order friction damper according to claim 1, characterized in that: The tempered glass plate (9) is a rectangular plate embedded in the hole in the middle of the cover plate (2). The internal situation can be observed from the outside through the tempered glass plate (9).

10. A method for installing an assembled, corrosion-resistant second-order friction damper according to any one of claims 1 to 9, characterized in that: An assembled, corrosion-resistant second-order friction damper is installed as follows: 1) Align the screw holes on the upper and lower flanges of the two channel steel pressure plates (4) with the screw holes on the upper and lower steel plates of the fixed end frame (1), and fix them with bolts (3); 2) Align the slots of the low friction coefficient plate (8) with the high friction coefficient plate (5) and the sliding plate (6) and stick them together to form a whole, then insert them into the gap between the two side plates of the channel steel pressing plate (4) so ​​that the middle position of the low friction coefficient plate (8) coincides with the middle position of the channel steel pressing plate (4), which is the initial position of the friction plate and the sliding plate (6) as a whole; 3) Align the slotted holes of the friction plate and the sliding plate (6) as a whole with the screw holes of the side plate of the channel steel pressure plate (4), fix them with bolts (3), and apply the designed pre-tightening force to the bolts (3); 4) Align the screw holes of the cover plate (2) with the screw holes on the side of the fixed end frame, rotate the bolts (3) to fix, and assemble to form a semi-sealed box structure with only one end open to complete the installation.

11. The working method of an assembled, corrosion-resistant second-order friction damper according to any one of claims 1 to 9, characterized in that: Here’s how it works: 1) In the initial stage, the middle position of the low friction coefficient plate (8) coincides with the middle position of the channel steel pressure plate (4), which is the starting position of the second-order friction damper; 2) Since the friction coefficient of the low friction coefficient plate (8) is smaller than that of the high friction coefficient plate (5), the maximum static friction force at the low friction coefficient plate (8) is smaller than that at the high friction coefficient plate (5). When the force generated by the earthquake is larger than the maximum static friction force at the low friction coefficient plate (8) but smaller than the maximum static friction force at the high friction coefficient plate (5), the sliding plate (6) and the friction plate as a whole can only slide back and forth within the range of the low friction coefficient plate (8) and cannot continue to slide toward the high friction coefficient plate (5), which is called the first-order energy dissipation state; 3) When the force generated by the earthquake is greater than the maximum static friction force at the low friction coefficient plate (8) and the high friction coefficient plate (5) at the same time, the sliding plate (6) and the friction plate as a whole slide to the edge of the low friction coefficient plate (8) and continue to slide toward the high friction coefficient plate (5). At this time, the low friction coefficient plate (8) and the high friction coefficient plate (5) work together, and the energy dissipation capacity is improved, which is called the second-order energy dissipation state.

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