Self-resetting hierarchical friction increasing energy dissipation damper
By designing a graded friction-increasing energy-dissipating damper, and combining friction energy dissipation with a lever system, the problems of high stiffness under small displacement and difficulty in reset under large displacement of traditional friction dampers are solved, achieving flexible damping and self-reset effects under different displacements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHANGAN UNIV
- Filing Date
- 2024-01-22
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional friction dampers have high stiffness under small displacements, making them difficult to effectively reduce vibrations and easily leading to building fatigue damage; friction dampers with self-resetting function have high frictional energy consumption during the reset process, making it difficult to fully reset, and the structure is difficult to fully recover under large displacements.
Design a self-resetting graded friction incremental energy dissipation damper, comprising a friction energy dissipation system, a reset system, and a lever system. By using the friction energy dissipation and reset systems that operate simultaneously under small displacements, and the dual-system friction energy dissipation and automatic reset under large displacements, the damper can achieve flexible response and complete reset.
The system achieves self-resetting under small displacement to reduce building fatigue damage, and achieves dual-system friction energy dissipation and automatic reset under large displacement to ensure complete building reset and reduce the impact of external vibration.
Smart Images
Figure CN117868335B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of building vibration reduction technology, specifically to a self-resetting graded friction-increasing energy-dissipating damper. Background Technology
[0002] Throughout their lifespan, building structures are constantly subjected to vibrations from external influences, including the surrounding environment (such as the demolition of old buildings, disturbances from large construction equipment, and vibrations from high-speed rail operation) and the effects of earthquakes. Earthquakes, in particular, can severely impact the normal use of buildings and pose a significant threat to human life. Furthermore, post-earthquake building repair and reconstruction are complex issues. Therefore, vibration damping measures are crucial. With the development of current building vibration damping technology, friction dampers have emerged, characterized by replaceability and self-resetting, and featuring friction energy dissipation and partial component yielding. These dampers, to a certain extent, reduce the impact of external vibrations on buildings.
[0003] However, traditional friction dampers generally have high stiffness and cannot function well under small displacements, making buildings prone to fatigue failure under small displacement environments such as minor earthquakes and external vibrations. This problem is particularly prominent in steel structures. In addition, based on the design concept of "self-resetting and repair-free", friction dampers are gradually being associated with self-resetting mechanisms. However, traditional friction dampers with self-resetting functions have a large frictional energy dissipation capacity during the reset process, making it difficult for the building structure to fully reset and easily resulting in large residual deformation. Summary of the Invention
[0004] To address the problems existing in the prior art, the purpose of this invention is to provide a self-resetting graded friction-increasing energy-dissipating damper. Under small displacements, the internal friction energy-dissipating system and the end reset system work simultaneously, reducing the impact of external vibrations on the building while promoting the automatic reset of the damper. Under large displacements, the internal friction energy-dissipating system, the external lever system, and the end reset system work simultaneously, achieving dual-system friction energy dissipation and automatic reset of the damper under large displacements.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: A self-resetting graded friction-increasing energy-dissipating damper includes a friction energy-dissipating system, a reset system, and a lever system. The friction energy-dissipating system is disposed inside the lever system. The friction energy-dissipating system has reset systems at both ends. One end of the reset system is fixedly connected to the lever system. A steel rod passes through the friction energy-dissipating system and is movably connected to the lever system at both ends.
[0006] Preferably, the friction energy dissipation system includes a fixed plate and a crossbar. The upper and lower ends of the fixed plate are fixedly connected to the crossbar, and the two ends of the crossbar are connected to a reset system. The fixed plate is provided with a first force transmission hole and a first friction hole. The first force transmission hole is located at the center of the fixed plate, and the first friction holes are distributed on the upper and lower sides of the first force transmission hole. Sliding plates are provided on the front and rear sides of the fixed plate, and the sliding plates are connected to the fixed plate through the first friction holes.
[0007] Preferably, the crossbar includes a horizontal groove bar, with anchor rods at both ends of the horizontal groove bar, and disc spring rods between both ends of the horizontal groove bar and the anchor rods. The upper and lower ends of the fixing plate are respectively embedded in the horizontal groove of the horizontal groove bar.
[0008] Preferably, the length and diameter of the anchor rod are both smaller than the length and diameter of the disc spring rod, and the length and diameter of the disc spring rod are both smaller than the length and diameter of the transverse groove rod.
[0009] Preferably, the sliding plate is composed of a plate body and an integrally formed plate neck. The plate body is connected to the fixed plate through a first friction hole, and a second force transmission hole corresponding to the first force transmission hole is provided at the center of the plate body.
[0010] Preferably, the lever system includes a frame, which is composed of a first side plate, a second side plate and a third side plate. The inner walls of the second side plate and the third side plate are provided with rotating parts, and a third friction hole is provided through the second side plate and the third side plate. The rotating parts are connected to the third friction holes.
[0011] Preferably, the rotating component includes an outer plate and an inner plate, the head of the outer plate being inserted into the head of the inner plate, and both the outer plate and the inner plate being provided with a second friction hole. The second friction hole and the third friction hole are connected by bolts. One end of the steel rod is hinged to the second side plate and the insertion point of the outer plate and the inner plate on the second side plate, and the other end passes through the first force transmission hole and the second force transmission hole, and is hinged to the third side plate and the insertion point of the outer plate and the inner plate on the third side plate.
[0012] Preferably, the reset system includes a compression plate and an anchor plate, a disc spring is provided between the compression plate and the anchor plate, the anchor rod passes through the compression plate and is fixedly connected to the anchor plate, the disc spring is sleeved on the disc spring rod, the anchor plate near the first side plate is fixedly connected to the first side plate, the end of the plate neck passes through the compression plate and the anchor plate and is exposed, and the compression plate contacts the end of the transverse groove rod.
[0013] Preferably, the second friction hole is vertical and the third friction hole is horizontal.
[0014] Preferably, the neck end of the plate is provided with a mounting hole.
[0015] Compared with existing energy-consuming vibration reduction devices, the advantages of this invention are: (1) The damper provided by the present invention can cope with vibrations of different sizes more comprehensively and flexibly, and can perform graded friction energy dissipation for different sizes of displacements and always play a self-resetting function under different sizes of displacements. Under small displacements, the friction energy dissipation system and the reset system work simultaneously to achieve the self-resetting function and friction energy dissipation under small displacements. Under large displacements, the internal friction energy dissipation system, the lever system and the reset system work simultaneously. The outer lever system is amplified displacement friction energy dissipation, realizing the dual-system friction energy dissipation and automatic reset function of the damper under large displacements. During the automatic reset process, the lever system does not consume energy. While reducing the impact of external vibrations on the building, it can promote the complete reset of the building.
[0016] (2) The damper provided by the present invention has a horizontal friction hole and a vertical friction hole sliding connection in the outer lever system. Under large displacement, the small displacement at the plate head can drive the large displacement of the plate seat through the extended plate and the concave plate, thereby realizing the dual friction energy dissipation of the second friction hole and the third friction hole by the small displacement at the plate head. That is, under large displacement, the lever system alone can realize the dual amplified displacement friction energy dissipation. The combined action of the lever system and the friction energy dissipation system makes the damper produce a greater friction energy dissipation effect under large displacement. Compared with the arc friction hole in the traditional amplified displacement, the friction energy dissipation effect of the present invention is better. In addition, in specific practical applications, the force of the damper of the present invention is clearer and more definite than that of the arc friction hole, and the calculation and derivation of the energy dissipation capacity of the damper is more convenient and advantageous.
[0017] (3) When the damper provided by the present invention is transitioning from a large displacement state to an initial state (i.e., after the lever system is triggered, during the process of the damper recovering from the compression state to the initial state), the friction energy dissipation system can achieve a slow reset effect to prevent the building structure from causing unnecessary additional damage due to excessive swaying speed. The outer lever system does not hinder the reset process, making it easier for the damper to achieve complete reset, thereby promoting the complete reset of the building. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the damper of the present invention; Figure 2 This is a schematic diagram of the friction energy dissipation system and reset system of the present invention; Figure 3 This is an exploded view of the friction energy dissipation system of the present invention; Figure 4 This is a schematic diagram of the lever system of the present invention; Reference numerals: 1 Friction energy dissipation system, 11 Fixed plate, 12 Crossbar, 121 Horizontal groove bar, 122 Disc spring bar, 123 Anchor bar, 124 Horizontal groove, 13 Sliding plate, 131 Plate body, 132 Plate neck, 133 Second force transmission hole, 14 First force transmission hole, 15 First friction hole, 2 Reset system, 21 Pressing plate, 22 Anchor plate, 23 Disc spring, 3 Lever system, 31 Frame, 311 First side plate, 312 Second side plate, 313 Third side plate, 314 Third friction hole, 32 Rotating component, 321 Outer plate, 322 Inner concave plate, 323 Second friction hole, 4 Steel rod. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] refer to Figure 1 This invention proposes a self-resetting graded friction incremental energy dissipation damper, including a friction energy dissipation system 1, a reset system 2, and a lever system 3. The friction energy dissipation system 1 is disposed inside the lever system 3. The friction energy dissipation system 1 is provided with reset systems 2 at both ends. One end of the reset system 2 is fixedly connected to the lever system 3. A steel rod 4 passes through the friction energy dissipation system 1 and is movably connected to the lever system 3 at both ends.
[0021] In the above embodiments, both ends are connected to the building. Under small displacement conditions, the building requires minimal frictional energy dissipation. The internal frictional energy dissipation system 1 alone is sufficient to meet the building's vibration reduction needs. The end reset system 2 causes the damper to reset. During the damper reset process, the frictional energy dissipation is minimal, ensuring complete building reset. Under large displacement conditions, when the frictional energy dissipation system 1 reaches a certain displacement, the steel rod 4 interacts with the lever system 3, activating the lever system 3 to dissipate energy. This achieves dual-system frictional energy dissipation of the frictional energy dissipation system 1 and the lever system 3 under large displacement conditions, meeting the building's vibration reduction requirements. The reset system 2 causes the damper to reset. During the reset process, the lever system 3 does not obstruct the reset process, promoting complete building reset.
[0022] For details, please refer to Figure 2 and Figure 3 The friction energy dissipation system 1 includes a fixed plate 11 and a crossbar 12. The fixed plate 11 is provided with a first force transmission hole 14 and a first friction hole 15. The first force transmission hole 14 is located at the center of the fixed plate 11, and the first friction hole 15 is distributed on the upper and lower sides of the first force transmission hole 14. The front and rear sides of the fixed plate 11 are provided with sliding plates 13. The crossbar 12 includes a horizontal groove bar 121, with anchor rods 123 at both ends of the horizontal groove bar 121. A disc spring rod 122 is provided between both ends of the horizontal groove bar 121 and the anchor rods 123. The horizontal groove bar 121, the disc spring rod 122, and the anchor rod 123 are integrated. The upper and lower ends of the fixing plate 11 are respectively embedded in the horizontal groove 124 of the horizontal groove bar 121. The length and diameter of the anchor rod 123 are smaller than the length and diameter of the disc spring rod 122, and the length and diameter of the disc spring rod 122 are smaller than the length and diameter of the horizontal groove bar 121. The sliding plate 13 is composed of a plate body 131 and a plate neck 132 integral therewith. The first friction hole 15 is slidably connected to the plate body 131 by bolts. The center of the plate body 131 is provided with a second force transmission hole 133 corresponding to the first force transmission hole 14. Preferably, the upper and lower ends of the plate body are in contact with the transverse groove rod 121 respectively. The reset system 2 includes a pressing plate 21 and an anchor plate 22. A disc spring 23 is provided between the pressing plate 21 and the anchor plate 22. The anchor rod 123 passes through the pressing plate 21 and is fixedly connected to the anchor plate 22. The disc spring 23 is sleeved on the disc spring rod 122. The anchor plate 22 near the first side plate 311 is fixedly connected to the first side plate 311. The end of the plate neck 132 passes through the pressing plate 21 and the anchor plate 22 and is exposed. The exposed part of the plate neck 132 is provided with a mounting hole for connecting to the building. The plate neck 132 can pass through the anchor plate 22 and move by friction. The pressing plate 21 contacts the end of the transverse groove rod 121 and the plate body 131. When the plate body 131 moves, it can drive one side of the pressing plate 21 to press the disc spring 23.
[0023] In the above embodiment, when the building undergoes a small displacement, the sliding plate 13 is displaced, which drives the compression plate 21 on one side to move. The disc spring 23 contracts and dissipates energy. The sliding plate 13 and the fixed plate 11 slide relative to each other. Friction energy is generated between the sliding plate 13 and the fixed plate 11, between the bolt and the plate body 131, between the plate body 131 and the transverse groove rod 121, and between the sliding plate 13 and the anchor plate 22. This meets the energy dissipation requirements for building vibration reduction. Under the action of the disc spring 23, the damper returns to its initial state, and the building resets.
[0024] For details, please refer to Figure 1 and Figure 4 The lever system 3 includes a frame 31, which is composed of a first side plate 311, a second side plate 312 and a third side plate 313. The inner walls of the second side plate 312 and the third side plate 313 are provided with rotating parts 32, and transverse third friction holes 314 are provided through the second side plate 312 and the third side plate 313. The rotating component 32 includes an outer plate 321 and an inner plate 322. The head of the outer plate 321 is inserted into the head of the inner plate 322. Both the outer plate 321 and the inner plate 322 are provided with vertical second friction holes 323. The vertical second friction holes 323 are connected to the horizontal third friction holes 314 by bolts. One end of the steel rod 4 is hinged to the second side plate 312 and the insertion point of the outer plate 321 and the inner plate 322 on the second side plate 312. The other end passes through the first force transmission hole 14 and the second force transmission hole 133 and is hinged to the third side plate 313 and the insertion point of the outer plate 321 and the inner plate 322 on the third side plate 313.
[0025] In the above embodiment, the first side plate 311 is fixedly connected to the building. When the building undergoes a large displacement, when the sliding plate 13 in the friction energy dissipation system 1 continues to slide and rub, causing the high-strength steel rod 4 to contact the edge of the second force transmission hole 133, the further sliding of the sliding plate 13 causes the steel rod 4 to drive the two side extension plates 321 and concave plates 322 to rotate around the hinge point, generating friction energy dissipation. At the same time, since the extension plates 321 and concave plates 322 tend to swing left and right and make circular motion, the force is orthogonally decomposed into horizontal force and vertical force, connecting the second friction hole 323 and the third friction hole 323. Bolt 14 slides vertically relative to the second friction hole 323, generating frictional energy dissipation, and slides horizontally relative to the third friction hole 314, generating dual frictional energy dissipation in both vertical and horizontal directions. That is, the lever system 3 achieves a small displacement of the plate head driving a large displacement of the plate base, generating dual frictional energy dissipation. Under the action of disc spring 23, the damper automatically returns to its initial state. Under large displacement, the damper is not affected by the friction of the lever system 3 when it performs the self-resetting effect. Only the frictional energy dissipation system 1 forces the damper to slowly reset, which can prevent unnecessary damage to the building structure caused by excessive swaying speed.
[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.
Claims
1. A self-resetting, graded friction-increasing energy-dissipating damper, characterized in that, It includes a friction energy dissipation system (1), a reset system (2), and a lever system (3). The friction energy dissipation system (1) is located inside the lever system (3). The friction energy dissipation system (1) has a reset system (2) at both ends. One end of the reset system (2) is fixedly connected to the lever system (3). A steel rod (4) passes through the friction energy dissipation system (1) and is movably connected to the lever system (3) at both ends. The lever system (3) includes a frame (31), which is composed of a first side plate (311), a second side plate (312), and a third side plate (313). A rotating component (32) is provided on the inner wall of both the second side plate (312) and the third side plate (313). A third friction hole (314) is provided through both the second side plate (312) and the third side plate (313). The rotating component (32) is connected to the third friction hole (314). The rotating component (32) includes an extended plate (321) and an inner concave plate (322). The head of the extended plate (321) is inserted into the head of the inner concave plate (322). A second friction hole (323) is provided on both the extended plate (321) and the inner concave plate (322). The second friction hole (323) is connected to the third friction hole (314) by bolts. Friction consumption... The energy system (1) includes a fixed plate (11), the fixed plate (11) is provided with a first force transmission hole (14) at its center, and a sliding plate (13) is provided on the front and rear sides of the fixed plate (11). The sliding plate (13) is composed of a plate body (131) and a plate neck (132) integral with it. The plate body (131) is provided with a second force transmission hole (133) corresponding to the first force transmission hole (14) at its center. One end of the steel rod (4) is hinged to the insertion point of the extension plate (321) and the concave plate (322) on the second side plate (312), and the other end passes through the first force transmission hole (14) and the second force transmission hole (133) and is hinged to the insertion point of the extension plate (321) and the concave plate (322) on the third side plate (313). The second friction hole (323) is vertical and the third friction hole (314) is horizontal.
2. The self-resetting graded friction-increasing energy-dissipating damper according to claim 1, characterized in that, The friction energy dissipation system (1) also includes a crossbar (12), the upper and lower ends of the fixed plate (11) are fixedly connected to the crossbar (12) respectively, the two ends of the crossbar (12) are connected to the reset system (2), the fixed plate (11) is also provided with a first friction hole (15), the first friction hole (15) is distributed on the upper and lower sides of the first force transmission hole (14), and the sliding plate (13) is connected to the fixed plate (11) through the first friction hole (15).
3. The self-resetting graded friction-increasing energy-dissipating damper according to claim 2, characterized in that, The crossbar (12) includes a cross groove bar (121), with anchor rods (123) at both ends of the cross groove bar. Disc spring rods (122) are provided between both ends of the cross groove bar (121) and the anchor rods (123). The upper and lower ends of the fixing plate (11) are respectively embedded in the cross groove (124) of the cross groove bar (121).
4. The self-resetting graded friction-increasing energy-dissipating damper according to claim 3, characterized in that, The length and diameter of the anchor rod (123) are both smaller than the length and diameter of the disc spring rod (122), and the length and diameter of the disc spring rod (122) are both smaller than the length and diameter of the transverse groove rod (121).
5. The self-resetting graded friction-increasing energy-dissipating damper according to claim 3, characterized in that, The plate body (131) is connected to the fixing plate (11) through the first friction hole (15).
6. The self-resetting graded friction-increasing energy-dissipating damper according to claim 5, characterized in that, The reset system (2) includes a pressing plate (21) and an anchor plate (22). A disc spring (23) is provided between the pressing plate (21) and the anchor plate (22). The anchor rod (123) passes through the pressing plate (21) and is fixedly connected to the anchor plate (22). The disc spring (23) is sleeved on the disc spring rod (122). The anchor plate (22) near the first side plate (311) is fixedly connected to the first side plate (311). The end of the plate neck (132) passes through the pressing plate (21) and the anchor plate (22) and is exposed. The pressing plate (21) is in contact with the end of the transverse groove rod (121) and the plate body (131).
7. The self-resetting graded friction-increasing energy-dissipating damper according to claim 1, characterized in that, The end of the plate neck (132) is provided with a mounting hole.