Friction composite metal damper with arc-shaped energy dissipation plate

Abstract

The application discloses a friction composite metal damper with arc-shaped energy dissipation plates, which comprises a first energy dissipation mechanism and a second energy dissipation mechanism, and the first energy dissipation mechanism is fixedly connected with the second energy dissipation mechanism; the first energy dissipation mechanism comprises a sliding guide rod, a disc spring and a first combined connecting piece; one end of the sliding guide rod extends out of the first combined connecting piece and is connected with a building structural member; the other end of the sliding guide rod is provided with a limiting plate for clamping the disc spring, and the sliding guide rod can compress the disc spring; the second energy dissipation mechanism comprises a sawtooth plate one, a sawtooth plate two, a sawtooth plate three, a sawtooth plate four, a second combined connecting piece, a sleeve, a connecting rod, a circular part and a curved energy dissipation plate; the sleeve is connected with the first combined connecting piece, the sawtooth plate one and the sawtooth plate four; the second combined connecting piece is provided with the sawtooth plate two and the sawtooth plate three on the surface of one end in a symmetrical mode; and the other end of the second combined connecting piece is connected with the building structural member. The application has the advantages of strong energy dissipation and vibration reduction effect, convenient disassembly and stage yield energy dissipation.

Description

TECHNICAL FIELD

[0001] The application belongs to dampers, and particularly relates to a friction composite metal damper with an arc-shaped energy dissipation plate. BACKGROUND

[0002] The anti-seismic design of a traditional structure mainly increases the rigidity of the structure by adjusting the performance of the structure itself, such as increasing the sectional size of beams, columns, walls and other components, adopts different measures to adjust the bearing capacity of the structure, changes the mass distribution of the structure and the like to resist the action of a strong earthquake. However, the earthquake action has great randomness and strong destructiveness, so that many large and special structures will be very uneconomic to ensure safety under the action of an earthquake.

[0003] So far, the research and application of civil engineering structure control can be divided into three categories: passive energy dissipation, base isolation and active, semi-active and intelligent control. Passive energy dissipation technology is to set energy dissipation elements (dampers or energy dissipaters) as non-structural components into the structure, and guide the energy input into the structure by the earthquake motion to the energy dissipation elements. These energy dissipation elements reciprocate under the action of the earthquake motion to absorb and dissipate energy, thereby reducing the dynamic response of the main structure and protecting the safety of the main structure. Among them, the metal damper is widely used in building structures due to its low cost and excellent energy dissipation capacity.

[0004] However, the traditional damper has poor repairability. Once the connecting components of the core energy dissipation element are damaged, the entire energy dissipation damper cannot be used again, and the entire damaged damper arranged in the building structure needs to be replaced to protect the main structure again. Therefore, designing different structural modes, various energy dissipation types of dampers, using new materials and increasing the repairability of the damper after the earthquake have become the main direction of the development of the metal damper. Therefore, the application aims to design a composite metal damper which can realize three different energy dissipation modes of staged, repairable compression, friction and bending plastic deformation. SUMMARY

[0005] The application aims to overcome the deficiencies in the prior art and provide a friction composite metal damper with an arc-shaped energy dissipation plate which can realize three different energy dissipation modes of staged, repairable compression, friction and bending plastic deformation.

[0006] Technical solution: The friction composite metal damper with arc-shaped energy dissipation plate comprises a first energy dissipation mechanism and a second energy dissipation mechanism, and the first energy dissipation mechanism is fixedly connected with the second energy dissipation mechanism; the first energy dissipation mechanism comprises a sliding guide rod, a disc spring and a first combined connecting piece, one end of the sliding guide rod extends out of the first combined connecting piece and is connected with a building structure, the other end is provided with a limiting plate for clamping the disc spring, and the sliding guide rod can compress the disc spring; the second energy dissipation mechanism comprises sawtooth plate one, sawtooth plate two, sawtooth plate three, sawtooth plate four, a second combined connecting piece, a sleeve, a connecting rod, a circular part and a curved energy dissipation plate, the sleeve is connected with the first combined connecting piece, the sawtooth plate one and the sawtooth plate four, the second combined connecting piece is provided with the sawtooth plate two and the sawtooth plate three on the surface in a symmetrical manner, the other end is connected with the building structure, the sawtooth plate two is engaged with the sawtooth plate one, the sawtooth plate three is engaged with the sawtooth plate four, the connecting rod is connected with the second combined connecting piece and the circular part respectively, and the circular part can extrude the curved energy dissipation plate to cause plastic deformation.

[0007] The friction composite metal damper further comprises a first protective shell and a second protective shell, the first protective shell is connected with the first combined connecting piece and the sleeve, and the second protective shell is connected with the sleeve and the curved energy dissipation plate.

[0008] Further, the first combined connecting piece is connected with the first protective shell through a panel, and the disc spring is arranged in a space enclosed by the first combined connecting piece, the panel and the sliding guide rod. Preferably, the first protective shell is fixedly connected with the first combined connecting piece and the sleeve through bolts. The second protective shell is fixedly connected with the sleeve and the curved energy dissipation plate through bolts. The metal damper can be checked and replaced after the earthquake, and rust of the damper caused by external environmental factors such as damp can be avoided through segmented assembly connection by bolts.

[0009] Further, the first combined connecting piece comprises a fixed frame, a partition plate and a connecting plate, the fixed frame is provided with a groove for the sliding guide rod to extend out, the partition plate is arranged in the fixed frame and in contact with the disc spring, and the connecting plate is fixedly connected with the sleeve.

[0010] Further, the disc spring is initially in a compressed state. The disc spring is a B3 series disc spring, which has higher elasticity than other models and can better realize elastic energy dissipation. The disc spring can realize telescopic deformation, reduce the residual deformation of the structure, not only improve the lateral stiffness of the damper and increase the damping efficiency of the damper, but also limit the limit displacement of the sliding guide rod when the damper is stretched and compressed greatly, and prevent the damper from being damaged instantaneously.

[0011] Further, the sleeve comprises an upper sleeve, a lower sleeve, the upper sleeve, the lower sleeve, the sawtooth plate one and the sawtooth plate four are fixedly connected through bolts. The length of the sawtooth plate two is less than the length of the sawtooth plate one, and the length of the sawtooth plate three is less than the length of the sawtooth plate four, so as to ensure the relative sliding space between the two and better friction energy dissipation.

[0012] Working principle: firstly, energy is dissipated through three different ways of compression deformation (disc spring), friction (sawtooth plate) and plastic bending deformation (bending energy dissipation plate), thereby improving the damping effect of the metal damper. When the lateral horizontal force is large, the disc spring compression deformation dissipates energy; when the lateral horizontal force is very large, the elastic performance of the disc spring reaches the limit, the relative sliding between the two sawtooth plates occurs, and the energy is dissipated through sliding friction. At this time, the bending energy dissipation plate also produces a small bending elastic deformation, but does not dissipate energy; when the lateral horizontal force continues to increase, the elastic performance of the disc spring reaches the limit, the friction energy dissipation between the two sawtooth plates reaches the limit and is damaged, and at this time the bending energy dissipation plate produces a large plastic bending deformation and enters the yield stage, thereby realizing staged yield energy dissipation and achieving the effect of energy dissipation and shock absorption.

[0013] Advantages: compared with the prior art, the present application has the following remarkable features:

[0014] 1. The composite metal damper has strong energy dissipation and damping effect, is easy to disassemble, can realize staged yield energy dissipation, and has three different energy dissipation ways of repairable compression, friction and bending plastic deformation;

[0015] 2. The disc spring is arranged to realize telescopic deformation, reduce the residual deformation of the structure, enhance the lateral stiffness of the damper by combining the friction between the sawtooth plates, and realize the back thrust of the sawtooth plates by arranging the bending energy dissipation plate, thereby further enhancing the stability of the structure;

[0016] 3. The damper is assembled and connected in sections through bolts, so that the internal core energy dissipation part of the damper can be checked and replaced after the earthquake, and the damper can be prevented from rusting due to external environmental factors;

[0017] 4. The friction between the engaged sawtooth plate one and sawtooth plate two and the sawtooth plate three and sawtooth plate four is changed by adjusting the pre-tightening force of the third bolt. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of the present application;

[0019] Figure 2 is a structural schematic view of the first protective shell 3 of the present application;

[0020] Figure 3This is a schematic diagram of the structure of the first combined connector 13 of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the sleeve 26 of the present invention;

[0022] Figure 5 This is a schematic diagram of the sawtooth plate 21 of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the second sawtooth plate 22 of the present invention;

[0024] Figure 7 This is a schematic diagram of the structure of the second combined connector 25 of the present invention;

[0025] Figure 8 This is a schematic diagram of the structure of the bending energy dissipation plate 29 of the present invention;

[0026] Figure 9 This is a schematic diagram of the structure of the second protective shell 4 of the present invention. Detailed Implementation

[0027] like Figure 1 The friction composite metal damper with an arc-shaped energy-dissipating plate is made of Q235 conventional steel and includes a first energy-dissipating mechanism 1 and a second energy-dissipating mechanism 2. The first energy-dissipating mechanism 1 and the second energy-dissipating mechanism 2 are fixedly connected, and their other ends are connected to energy-dissipating supports in the building structure. The first energy-dissipating mechanism 1 includes a sliding guide rod 11, a disc spring 12, and a first combined connecting member 13. One end of the sliding guide rod 11 extends out of the first combined connecting member 13, and the other end has a limiting plate 111 for locking the disc spring 12. The end of the sliding guide rod 11 extending out of the first combined connecting member 13 has a threaded hole for fixed connection with the building structure. The sliding guide rod 11 can compress the disc spring 12. The disc spring 12 is a B3 series disc spring, initially in a compressed state. The second energy-consuming mechanism 2 includes a first sawtooth plate 21, a second sawtooth plate 22, a third sawtooth plate 23, a fourth sawtooth plate 24, a second combined connector 25, a sleeve 26, a connecting rod 27, a circular component 28, and a bent energy-consuming plate 29. The sleeve 26 includes an upper sleeve 261 and a lower sleeve 262, both with identical structures and symmetrically placed. The sleeve 26 is connected to the first combined connector 13, the first sawtooth plate 21, and the fourth sawtooth plate 24. The second combined connector 25 has symmetrically arranged second sawtooth plates 22 and third sawtooth plates 23 on one end surface, and the other end is connected to a building structural component. Second sawtooth plate 22 engages with first sawtooth plate 21, and third sawtooth plate 23 engages with fourth sawtooth plate 24. The connecting rod 27 is connected to the second combined connector 25 and the circular component 28 respectively. The circular component 28 dissipates energy by plastically deforming the bent energy-consuming plate 29 through compression.

[0028] like Figure 2The first protective shell 3 has a sliding channel 31 for the sliding guide rod 11 to move and a threaded hole 32 for the first combined connector 13 and sleeve 26 to be fixedly connected by bolt 5.

[0029] like Figure 3 The first combined connector 13 includes a fixed frame 131, a partition 132, and a connecting plate 133. The fixed frame 131 of the first combined connector 13 has a partition 132 inside, and two layers of disc springs 12 are provided on the upper and lower parts of the partition 132. This not only improves the lateral stiffness of the damper and increases its damping efficiency, but also limits the ultimate displacement of the sliding guide rod 11 when the damper is subjected to large-scale tension and compression, preventing the damper from instantaneously failing. The connecting plate 133 also has a threaded hole 134 for connecting to the first protective shell 3 and the sleeve 26, and is fixedly connected by bolts 5.

[0030] like Figures 4-6 The upper sleeve 261 has a serrated plate 21 fixedly connected inside, and the lower sleeve 262 has a serrated plate 24 fixedly connected inside. Serrated plates 21 and 24 are identical in construction. The upper sleeve 261 has a threaded hole 2611 for fixing to bolt 5, a threaded hole 2612 for fixing to bolt 6, and a threaded hole 2613 for fixing to bolt 7. Threaded hole 2611 is exactly the same size as threaded hole 32. Serrated plate 21 has a threaded hole 211 that matches bolt 7, and serrated plate 22 has a threaded hole 221 that matches bolt 8. Serrated plates 21 and 24 are fixedly connected to the upper sleeve 261 and lower sleeve 262 respectively by bolt 7. Serrated plates 22 and 23 are fixedly connected to the second assembly connector 25 by bolt 8. The length of sawtooth plate 22 is less than the length of sawtooth plate 21, and the length of sawtooth plate 23 is less than the length of sawtooth plate 24. The upper sleeve 261 and lower sleeve 262 are respectively provided with grooves for fixing sawtooth plate 22 and sawtooth plate 23. These grooves fix sawtooth plate 22 and sawtooth plate 23, making them detachable and easy to replace. The friction between sawtooth plate 21 and sawtooth plate 22, and between sawtooth plate 23 and sawtooth plate 24, can be changed by adjusting the preload of bolt 37. Sawtooth plate 21 and sawtooth plate 24 have a thread length of 120mm and an angle of 45°, while sawtooth plate 22 and sawtooth plate 23 have a thread length of 100mm and an angle of 45°. The entire assembly is detachable and easy to replace.

[0031] like Figures 7-9The second assembly connector 25 has a threaded hole 251 that matches bolt 4, and a threaded hole 252 for fixing to the building structure. The bending energy dissipation plate 29 has a threaded hole 291 that matches bolt 5. The second protective shell 4 has a threaded hole 401 that matches bolt 2, a threaded hole 402 that matches bolt 5, and a sliding groove 403 for the extension of the second assembly connector 25. The second protective shell 4 is fixed to the upper sleeve 261 and the lower sleeve 262 by bolt 26. The two bending energy dissipation plates 29 are fixed to the upper and lower symmetrical positions of the second protective shell 4 by bolt 5 9. By assembling and connecting in sections with bolts, the core energy dissipation components inside the metal damper can be inspected and replaced after an earthquake, and the damper can be prevented from rusting due to external environmental factors such as moisture.

[0032] In this embodiment, when subjected to a small lateral force from an earthquake or wind load, the damper utilizes the static friction between sawtooth plate 11 and sawtooth plate 22, sawtooth plate 33 and sawtooth plate 44, and the disc springs 12 at both ends of the sliding guide rod 11 to provide the horizontal lateral stiffness of the structure.

[0033] When the lateral horizontal force is large, the disc spring 12 undergoes elastic deformation. The load transmitted to the sawtooth plates 21, 22, 23, and 24 does not exceed the maximum static friction force. There is no relative sliding between sawtooth plates 21 and 22, and between sawtooth plates 23 and 24. The external load is still resisted by the static friction between sawtooth plates 21 and 22, and between sawtooth plates 23 and 24. The bending energy dissipation plate 29 does not undergo bending elastic deformation and does not dissipate energy.

[0034] When the lateral horizontal force is large, the elastic performance of the disc spring 12 reaches its limit. The load transmitted to the sawtooth plate 1 21 and sawtooth plate 22, and the sawtooth plate 3 23 and sawtooth plate 4 24 exceeds the maximum static friction force. Relative sliding will occur between sawtooth plate 1 21 and sawtooth plate 22, and sawtooth plate 3 23 and sawtooth plate 4 24. Energy is dissipated through the sliding friction between sawtooth plate 1 21 and sawtooth plate 22, and sawtooth plate 3 23 and sawtooth plate 4 24. The bending energy dissipation plate 29 will also produce a small bending elastic deformation, but it will not dissipate energy.

[0035] When the lateral horizontal force continues to increase, the elastic performance of the disc spring 12 reaches its limit, and the frictional energy dissipation between sawtooth plate 1 21 and sawtooth plate 22, and sawtooth plate 3 23 and sawtooth plate 4 24 reaches its limit. Sawtooth plate 1 21, sawtooth plate 22, sawtooth plate 3 23, and sawtooth plate 4 24 are damaged. At this time, the bending energy dissipation plate 29 undergoes a large plastic bending deformation and begins to enter the yielding stage, serving as the main energy dissipation component, thereby achieving staged yielding energy dissipation and achieving the effect of energy dissipation and vibration reduction.

Claims

1. A friction-composite metal damper with arc-shaped energy dissipation plate, characterized in that: The energy dissipation mechanism comprises a first energy dissipation mechanism (1) and a second energy dissipation mechanism (2), the first energy dissipation mechanism (1) is fixedly connected with the second energy dissipation mechanism (2); the first energy dissipation mechanism (1) comprises a sliding guide rod (11), a disc spring (12) and a first combined connecting piece (13), one end of the sliding guide rod (11) extends out of the first combined connecting piece (13) and is connected with a building structure, the other end is provided with a limiting plate (111) for clamping the disc spring (12), and the sliding guide rod (11) can compress the disc spring (12); the second energy dissipation mechanism (2) comprises a sawtooth plate one (21), a sawtooth plate two (22), a sawtooth plate three (23), a sawtooth plate four (24), a second combined connecting piece (25), a sleeve (26), a connecting rod (27), a circular part (28) and a curved energy dissipation plate (29), the sleeve (26) is connected with the first combined connecting piece (13), the sawtooth plate one (21) and the sawtooth plate four (24), one end surface of the second combined connecting piece (25) is symmetrically provided with the sawtooth plate two (22) and the sawtooth plate three (23), and the other end is connected with a building structure, the sawtooth plate two (22) is engaged with the sawtooth plate one (21), the sawtooth plate three (23) is engaged with the sawtooth plate four (24), the connecting rod (27) is connected with the second combined connecting piece (25) and the circular part (28) respectively, and the circular part (28) can extrude the curved energy dissipation plate (29) to make it plastically deform; The energy dissipation mechanism further comprises a first protective shell (3) and a second protective shell (4), the first protective shell (3) is connected with the first combined connecting piece (13) and the sleeve (26), and the second protective shell (4) is connected with the sleeve (26) and the curved energy dissipation plate (29); The first combined connecting piece (13) is connected with the first protective shell (3) through a panel (14), and the disc spring (12) is arranged in a space enclosed by the first combined connecting piece (13), the panel (14) and the sliding guide rod (11); The first protective shell (3) is fixedly connected with the first combined connecting piece (13) and the sleeve (26) through bolts. The second protective shell (4) is fixedly connected with the sleeve (26) and the curved energy dissipation plate (29) through bolts.

2. The friction composite metal damper with arc-shaped energy dissipation plate according to claim 1, characterized in that: The first combined connecting piece (13) comprises a fixed frame (131), a partition plate (132) and a connecting plate (133), the fixed frame (131) is provided with a groove for the sliding guide rod (11) to extend out, the partition plate (132) is arranged in the fixed frame (131) and is in contact with the disc spring (12), and the connecting plate (133) is fixedly connected with the sleeve (26).

3. The friction composite metal damper with arc-shaped energy dissipation plates according to claim 1, characterized in that: The disc spring (12) is initially in a compressed state.

4. The friction composite metal damper with arc-shaped energy dissipation plates according to claim 1, characterized in that: The sleeve (26) comprises an upper sleeve (261) and a lower sleeve (262), and the upper sleeve (261), the lower sleeve (262), the sawtooth plate one (21) and the sawtooth plate four (24) are fixedly connected through bolts.

5. The friction composite metal damper with arc-shaped energy dissipation plates according to claim 1, characterized in that: The length of the sawtooth plate two (22) is less than the length of the sawtooth plate one (21), and the length of the sawtooth plate three (23) is less than the length of the sawtooth plate four (24).

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