Bending type metal coupling beam damper capable of achieving damage control and damage detection

Abstract

The utility model relates to the technical field of coupling beam dampers, in particular to a bending type metal coupling beam damper capable of achieving damage control and damage detection, which comprises a piezoelectric transducer, two end plates and a web plate arranged between the two end plates, the two end plates are oppositely arranged, and the size of the middle of the web plate is smaller than that of the two ends of the web plate; the piezoelectric transducer comprises an excitation end and a receiving end, the excitation end and the receiving end are both located on the side face, close to the web plate, of any end plate, and the excitation end is in communication connection with the receiving end. According to the utility model, the damaged part of the damper can be controlled in the middle of the web plate, and then the energy consumption and residual energy consumption of the web plate are detected through the piezoelectric transducer.

Description

Technical Field

[0001] This utility model relates to the field of connecting beam dampers, specifically to a bending type metal connecting beam damper that can realize damage control and damage detection. Background Technology

[0002] Coupling beam dampers are the first line of defense in seismic isolation structures. Under earthquake action, as the weakest component of the entire structure, coupling beam dampers dissipate energy through displacement and friction. However, as the "fuse" of the seismic isolation structure, coupling beam dampers may suffer mechanical damage due to energy dissipation after an earthquake. If this damage is not detected and the dampers are not replaced in time, it will reduce the seismic resistance of the seismic isolation structure.

[0003] Metal bending coupling beam dampers are common energy dissipation devices frequently used in vibration reduction structures. They withstand bending moments during operation, and damage can occur on the web and end plates. The corresponding damage types include fracture at the web-end plate connection and fracture in the middle of the web. Currently, most testing of coupling beam dampers focuses on displacement or rotation. While this can reflect the damper's condition to some extent, it doesn't provide a direct way to assess its energy dissipation and remaining energy dissipation capacity, as the damper may suffer damage and energy dissipation in multiple locations after an earthquake.

[0004] Therefore, there is an urgent need for a type of coupling beam damper that can detect damage to the coupling beam damper in a timely manner and more intuitively reflect the energy dissipation capacity of the structure. Utility Model Content

[0005] The purpose of this invention is to provide a bending-type metal beam damper that can achieve damage control and damage detection, so as to solve the problem in related technologies that it is not convenient to intuitively detect the energy consumption and remaining energy consumption of the beam damper.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A bending-type metal beam damper capable of damage control and damage detection includes a piezoelectric transducer, two end plates, and a web plate disposed between the two end plates. The two end plates are arranged opposite each other, and the size of the middle part of the web plate is smaller than the size of the two ends. The piezoelectric transducer includes an excitation end and a receiving end, and the excitation end and the receiving end are both located on the side of any one of the end plates near the web plate. The excitation end and the receiving end are communicatively connected.

[0008] Furthermore, a plurality of parallel web plates are disposed between the two end plates, and the plurality of web plates are of the same shape and size.

[0009] Further, the two end plates are connected with positioning steel plates on the opposite sides, each of the positioning steel plates is attached to the surface of the corresponding end plate, a plurality of positioning holes are formed on each of the positioning steel plates, a plurality of through holes are formed on each of the end plates, the through holes correspond to the positioning holes one by one, and the inner diameter of the through holes is larger than that of the positioning holes.

[0010] Further, the exciting end and the receiving end are covered with mounting cylinders, a mounting plate is arranged on the sidewall of one end of the mounting cylinder, and the end of the mounting cylinder close to the mounting plate is connected with the end plate through bolts.

[0011] Further, the yield strength of the web plate is lower than that of the end plate.

[0012] Further, the web plate is made of LY100 or BLY160 material, and the end plate is made of Q235 or Q355 material.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] In the utility model, the middle part of the web plate of the metal coupled beam damper is smaller than the size of the two ends of the web plate, when the metal coupled beam damper bears a bending moment, the yield strength of the middle part of the web plate is the lowest, leading to the middle part of the web plate being most likely to deform and be mechanically damaged, meanwhile, the connection between the web plate and the end plate is not easy to deform, so as to realize the damage control of the damper in the middle part of the web plate; in the test stage, the bending moment is input to the metal coupled beam damper first, then the exciting end of the piezoelectric transducer emits a sound wave signal, the sound wave signal is transmitted through the web plate, the receiving end receives the sound wave signal after passing through the web plate, the characteristics of the above received sound wave signal are extracted, the metal coupled beam damper bears different sizes of bending moment, the web plate will produce different degrees of mechanical damage, meanwhile, the characteristics of the sound wave signal received by the receiving end are also different, so as to mark the corresponding relationship curve between the mechanical damage degree of the web plate and the characteristics of the sound wave signal of the receiving end; then when the damage degree of the metal coupled beam damper is actually detected, according to the above corresponding relationship curve, the mechanical damage degree and energy consumption of the metal coupled beam damper can be inversely deduced through the characteristics of the sound wave signal received by the receiving end, so as to facilitate the more intuitive detection of the residual energy consumption capacity of the metal coupled beam damper. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, are used to explain the utility model together with embodiments of the utility model, and do not constitute limitations to the utility model, and in the drawings:

[0016] Figure 1 It is a structural schematic view of the utility model.

[0017] Figure 2 For the utility model Figure 1 A part of A in the enlarged view.

[0018] Marked in the drawing and corresponding component name:

[0019] 1, end plate; 2, web; 3, excitation end; 4, receiving end; 5, positioning steel plate; 6, positioning hole; 7, through hole; 8, mounting cylinder; 9, mounting plate. Specific embodiments

[0020] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0021] Embodiment 1

[0022] A kind of bendable metal link damper of damage control and damage detection can be realized, refer to Figure 1 、 Figure 2 Including piezoelectric transducer, two end plates 1 and the web 2 being arranged between two described end plates 1, two end plates 1 are oppositely arranged, and the width of the middle part of web 2 is less than the width of two ends;Piezoelectric transducer includes excitation end 3 and receiving end 4, and excitation end 3 and receiving end 4 are located on the side surface of any one end plate 1 close to web 2, and excitation end 3 and receiving end 4 are connected in communication between them.

[0023] Specifically, excitation end 3 and receiving end 4 can be arranged on the same end plate 1, and excitation end 3 and receiving end 4 are located on the two sides of web 2 respectively. In other embodiments, excitation end 3 and receiving end 4 can be located on different end plates 1 respectively.

[0024] The middle part of the web plate 2 of the metal coupled beam damper is smaller in size than the two ends of the web plate 2, and when the metal coupled beam damper bears a bending moment, the yield strength of the middle part of the web plate 2 is the lowest, which causes the middle part of the web plate 2 to be the most prone to deformation and mechanical damage, and at the same time, the connection between the web plate 2 and the end plate 1 is not prone to deformation, so as to control the damage of the damper in the middle part of the web plate 2; in the test stage, a bending moment is first input to the metal coupled beam damper, and then a sound wave signal is emitted through the excitation end 3 of the piezoelectric transducer, the sound wave signal is transmitted through the web plate 2, and the receiving end 4 receives the sound wave signal after passing through the web plate 2, the characteristics of the above-mentioned received sound wave signal are extracted, the spectral characteristics of the signal are obtained by using the wavelet packet energy spectrum, and then the characteristics of the above-mentioned sound wave signal are corresponded to the damage degree of the web plate 2 by using the deep learning method, which belongs to the prior art means. The metal coupled beam damper bears different sizes of bending moment, and the web plate 2 will produce different degrees of mechanical damage, and the characteristics of the sound wave signal received by the receiving end 4 are also different, so that the corresponding relationship curve between the mechanical damage degree of the web plate 2 and the characteristics of the sound wave signal received by the receiving end 4 can be calibrated; then in the actual detection of the damage degree of the metal coupled beam damper, according to the above-mentioned corresponding relationship curve, the current mechanical damage degree and energy consumption of the metal coupled beam damper can be inversely deduced through the characteristics of the sound wave signal received by the receiving end 4, which is convenient for more intuitive detection of the energy consumption and residual energy consumption capacity of the metal coupled beam damper.

[0025] Embodiment 2

[0026] In this embodiment, on the basis of embodiment 1, with reference to Figure 1 , Figure 2 , a plurality of parallel web plates 2 are arranged between the two end plates 1, and the shapes and sizes of the plurality of web plates 2 are the same. The two ends of the web plate 2 are welded with the corresponding end plate 1, and the number of web plates 2 can be calculated by the designed yield force of the damper, that is, the designed yield force divided by the yield force of a single web plate 2, so as to facilitate the metal coupled beam damper to be applicable to different design yield force conditions.

[0027] Embodiment 3

[0028] In this embodiment, on the basis of embodiment 1, with reference to Figure 1 , Figure 2Each of the two end plates 1 has a positioning steel plate 5 bolted to its opposite side. Each positioning steel plate 5 is in contact with the surface of the corresponding end plate 1. Each positioning steel plate 5 has multiple positioning holes 6, and each end plate 1 has multiple through holes 7. The through holes 7 correspond one-to-one with the positioning holes 6, and the inner diameter of the through holes 7 is larger than the inner diameter of the positioning holes 6. By passing the positioning bolts through the through holes 7 and positioning holes 6 in sequence, the positioning steel plate 5 can be positioned on the connecting beam to confirm the position of the bolt holes on the connecting beam that connect to the end plate 1. The end plate 1 and the positioning steel plate 5 can then be fixed to the connecting beam with bolts. The positioning steel plate 5 ensures that the metal connecting beam damper is connected to the flat end surface, preventing uneven gaps between the concrete connecting beam and the end plate 1 from affecting the transmission of bending moment.

[0029] Example 4

[0030] Based on Example 1, in this example, refer to Figure 1 , Figure 2 Both the excitation end 3 and the receiving end 4 are covered by mounting cylinders 8. A mounting plate 9 is provided on one side wall of the mounting cylinder 8. The end of the mounting cylinder 8 near the mounting plate 9 is connected to the corresponding end plate 1 by bolts. Both the excitation end 3 and the receiving end 4 are tightly fitted to the corresponding end plate 1. By stably fixing the excitation end 3 and the receiving end 4 to the corresponding end plate 1, the excitation end 3 can transmit acoustic signals to the receiving end 4 through the end plate 1 and the web plate 2.

[0031] Example 5

[0032] Based on Example 1, in this example, refer to Figure 1 , Figure 2 The yield strength of the web plate 2 is lower than that of the end plate 1. Specifically, the web plate 2 can be made of LY100 or BLY160 material, and the end plate 1 can be made of Q235 or Q355 material.

[0033] In this scheme, by controlling the yield strength of the web plate 2 to be lower than that of the end plate 1, and because the middle part of the web plate 2 is smaller, it is easier for the middle part of the web plate 2 to deform and suffer mechanical damage. This makes it easier to control the mechanical damage of the metal beam damper to occur in the middle part of the web plate 2, so that the energy consumption of the metal beam damper is reflected on the web plate 2. Then, the acoustic signal after passing through the web plate 2 is detected by a piezoelectric transducer, so as to conveniently and intuitively detect the energy consumption and remaining energy consumption of the metal beam damper.

[0034] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application have been described in detail, for the skilled in the art, it still can be modified, or for the equivalent replacement of part of the technical features of the technical solutions recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, shall be included within the scope of the present application.

Claims

1. A curved metal link damper that can achieve damage control and damage detection, characterized in that: The piezoelectric transducer, two end plates (1) and a web (2) arranged between the two end plates (1), the two end plates (1) are oppositely arranged, the size of the middle part of the web (2) is smaller than that of the two ends; the piezoelectric transducer comprises an excitation end (3) and a receiving end (4), and the excitation end (3) and the receiving end (4) are located on the side of any one of the end plates (1) close to the web (2), and the excitation end (3) and the receiving end (4) are connected in communication.

2. The buckling-restrained metallic link damper capable of damage control and damage detection according to claim 1, wherein: A plurality of webs (2) parallel to each other are arranged between the two end plates (1), and the shapes and sizes of the plurality of webs (2) are the same.

3. The buckling-restrained metallic link damper capable of damage control and damage detection according to claim 1, wherein: The side of the two end plates (1) opposite to each other is connected with a positioning steel plate (5) through a bolt, each positioning steel plate (5) is attached to the surface of the corresponding end plate (1), a plurality of positioning holes (6) are formed on each positioning steel plate (5), a plurality of through holes (7) are formed on each end plate (1), the plurality of through holes (7) and the plurality of positioning holes (6) are one-to-one corresponding, and the inner diameter of the through hole (7) is larger than that of the positioning hole (6).

4. The buckling-restrained metallic link damper capable of damage control and damage detection according to claim 1, wherein: The excitation end (3) and the receiving end (4) are covered with a mounting cylinder (8), one end of the mounting cylinder (8) is provided with a mounting plate (9), one end of the mounting cylinder (8) close to the mounting plate (9) is connected with the end plate (1) through a bolt, and the excitation end (3) and the receiving end (4) are closely attached to the corresponding end plate (1).

5. The buckling-restrained metallic link damper capable of damage control and damage detection according to claim 1, wherein: The yield strength of the web (2) is lower than that of the end plate (1).

6. The buckling-restrained metallic link damper capable of damage control and damage detection according to claim 5, wherein: The web (2) is made of LY100 or BLY160 material, and the end plate (1) is made of Q235 or Q355 material.

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