Bending metal damper

Abstract

The present invention discloses a bending metal damper, which includes an upper energy dissipation plate fixedly connected to an upper connecting plate, a lower energy dissipation plate fixedly connected to a lower connecting plate, and a limiting device. The limiting device is installed between the upper and lower energy dissipation plates to limit the in-plane deformation of the upper and / or lower energy dissipation plates. The upper and lower energy dissipation plates are connected by the limiting device rather than directly connected, and the limiting device can provide a limit for the in-plane deformation of the upper and / or lower energy dissipation plates. The upper and lower energy dissipation plates are two steel plates separated from the midline of any one of an X-shaped, double X-shaped, diamond-shaped, triangular, rectangular, or rectangular steel plate with a hole in the middle. The limiting device is equivalent to being located at the midpoint of the entire energy dissipation steel plate. The bending damper is subjected to out-of-plane bending yield, and the inflection point appears at the midpoint of the energy dissipation steel plate. The setting of the limiting device at the midpoint can effectively overcome the adverse effects of the membrane effect caused by the out-of-plane bending yield of the bending damper during large deformation on the damper performance.

Description

Technical Field

[0001] The present invention relates to the technical field of dampers, and in particular to a curved metal damper. Background Art

[0002] Metal dampers are a common type of energy dissipation device in engineering structures. This type of damper utilizes the excellent elastic-plastic properties of metal materials (such as mild steel). Through the rational design of its structural form and mechanical parameters, it can be the first to yield and consume energy when the engineering structure is subjected to external forces (such as earthquakes), thereby ensuring the safety of the main structure. Metal dampers can be divided into bending type and shear type. Bending type metal dampers can be connected by bolts or welding, while shear type dampers are connected by welding. The performance of metal dampers is affected by factors such as their structural construction, geometric dimensions, connection method, and manufacturing process. The performance of metal dampers under different design conditions also varies greatly.

[0003] Currently, curved metal dampers still have many design and performance flaws: 1) For example, existing curved mild steel dampers all fix the upper and lower ends of the energy-absorbing steel plate to a connecting plate, resulting in a membrane effect during operation, seriously affecting the damper's energy-dissipating fatigue performance. 2) Existing metal dampers have a single energy-dissipating mechanism, and most cannot meet the requirements for both small and large earthquakes. 3) Some dampers are designed with a large yield displacement, which only dissipates energy and reduces vibration during large earthquakes, while remaining in an elastic state during small earthquakes, dissipating little or no energy. Other dampers have a smaller yield displacement, which can meet the energy-dissipating requirements for small earthquakes and have good energy dissipation and ductility performance during large earthquakes. However, these dampers often add significant stiffness to the structure, which in turn increases the seismic effect and is not conducive to the structure's seismic resistance. Furthermore, a few metal dampers have been improved to have a staged yield capability, but the complex design and installation of the energy-absorbing steel plates consume significant labor and financial resources. Summary of the Invention

[0004] The object of the present invention is to address the problems existing in the prior art and to provide a curved metal damper which has a simple structure, is easy to manufacture and can overcome the film effect.

[0005] To solve the above problems, the present invention provides the following solutions:

[0006] A curved metal damper comprises an upper energy dissipation plate fixedly connected to an upper connecting plate, a lower energy dissipation plate fixedly connected to a lower connecting plate, and a limiting device installed between the upper energy dissipation plate and the lower energy dissipation plate to limit the in-plane deformation of the upper energy dissipation plate and / or the lower energy dissipation plate.

[0007] As a preferred embodiment of the present invention, the limiting device is a card slot, including a bottom plate vertically fixed to the top of the lower energy consumption plate and a first limiting plate corresponding to both sides of the width direction of the upper energy consumption plate and vertically fixed to the bottom plate.

[0008] As a preferred embodiment of the present invention, the slot further includes second limiting plates corresponding to two sides in the thickness direction of the upper energy dissipation plate and vertically fixed to the bottom plate.

[0009] As a preferred embodiment of the present invention, two ends of the first limiting plate are vertically connected to two ends of the second limiting plate.

[0010] As a preferred embodiment of the present invention, a first gap is left between the second limiting plate and two sides of the upper energy dissipation plate.

[0011] As a preferred embodiment of the present invention, the size of the first gap is adjustable.

[0012] As a preferred embodiment of the present invention, an adjustable bolt is vertically connected to the second limiting plate, one end of the adjustable bolt extends into the first gap, and the size of the first gap is adjusted by adjusting the extension of the adjustable bolt.

[0013] As a preferred embodiment of the present invention, a second gap is left between the bottom end of the upper energy dissipation plate and the bottom plate.

[0014] As a preferred embodiment of the present invention, multiple groups of the upper energy consumption plates, the lower energy consumption plates and the limiting devices are connected between the upper connecting plate and the lower connecting plate, and the sizes of the first gaps in each of the limiting devices are not completely equal, and the size of the first gap in at least one of the limiting devices is zero.

[0015] As a preferred embodiment of the present invention, the upper energy dissipation plate and the lower energy dissipation plate are two steel plates separated from the median line, such as any one of X-shaped, double X-shaped, diamond-shaped, triangular, rectangular or rectangular steel plates with a hole in the middle.

[0016] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0017] The upper energy dissipation plate and the lower energy dissipation plate are connected by a limit device instead of a direct connection. Compared with a direct connection, the limit device can provide a limit for the in-plane deformation of the upper energy dissipation plate and / or the lower energy dissipation plate; the upper energy dissipation plate and the lower energy dissipation plate are two steel plates separated from the median line by any one of an X-shaped, double X-shaped, diamond-shaped, triangular, rectangular or rectangular steel plate with a middle hole. Therefore, it is equivalent to the limit device being located at the midpoint of the entire energy dissipation steel plate. The bending damper is subjected to out-of-plane bending yield, and the inflection point appears at the midpoint of the energy dissipation steel plate. Therefore, setting the limit device at the midpoint can effectively overcome the adverse effect of the membrane effect (in-plane stretching and lengthening) generated by the bending damper under large deformation due to out-of-plane bending yield on the damper performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a front schematic diagram of the curved metal damper according to Example 1 of the present invention.

[0020] Figure 2 It is a side view of the curved metal damper according to Example 1 of the present invention.

[0021] Figure 3 yes Figure 1 Cross-sectional view at point 1-1.

[0022] Figure 4 It is a schematic plan view of the assembly of the limiting slot and the energy dissipation plate of Example 2 of the present invention.

[0023] Figure 5 It is a schematic cross-sectional view of the assembly of the limiting slot and the energy dissipation plate of Example 2 of the present invention.

[0024] Figure 6 It is a schematic cross-sectional view of the assembly of the limiting slot and the energy dissipation plate of Example 3 of the present invention.

[0025] Figure 7 It is a side view of a curved metal damper according to embodiment 4 of the present invention.

[0026] The corresponding relationships marked in the figure are as follows:

[0027] 1-upper connecting plate; 2-lower connecting plate; 3-upper energy dissipation plate; 4-lower energy dissipation plate; 5-limiting device; 51-first limiting plate; 52-second limiting plate; 53-bottom plate; 54-first gap; 55-second gap; 6-adjusting bolt. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example 1:

[0030] See first Figures 1 to 3 , which are schematic diagrams of the front, side and cross-section of the first embodiment of the curved metal damper of the present invention.

[0031] The curved metal damper primarily comprises an upper connecting plate 1, a lower connecting plate 2, an upper energy dissipation plate 3, a lower energy dissipation plate 4, and a limiting device 5. The upper connecting plate 1 and the lower limiting plate 2 are each used to connect to the main structure. The curved metal damper is installed in a building structure such as a wall or beam slab. The upper energy dissipation plate 3 and the lower energy dissipation plate 4 are metal energy dissipation plates. The upper end of the upper energy dissipation plate 3 is perpendicular to and fixedly connected to the upper connecting plate 1, while the lower end of the lower energy dissipation plate 4 is perpendicular to and fixedly connected to the lower connecting plate 2, which can be fixed by welding. The limiting device 5 is installed between the lower end of the upper energy dissipation plate 3 and the upper end of the lower energy dissipation plate 4 to limit the in-plane deformation of at least one of the upper and lower energy dissipation plates 3 and 4. In other words, the limiting device 5 can be used to limit the in-plane deformation of only the upper and lower energy dissipation plates 3, 4, or both.

[0032] In this embodiment, the upper energy dissipation plate 3 and the lower energy dissipation plate 4 are two steel plates obtained by separating an X-shaped energy dissipation steel plate from the midline. In other embodiments, the upper energy dissipation plate 3 and the lower energy dissipation plate 4 can also be other types of energy dissipation steel plates separated from the midline to form the upper and lower steel plates, such as double X-shaped, diamond-shaped, triangular, rectangular or rectangular steel plates with a hole in the middle. Figure 7 FIG. 1 shows another embodiment of the curved metal damper of the present invention, wherein the upper energy dissipation plate 3 and the lower energy dissipation plate 4 are upper and lower steel plates obtained by separating the rectangular steel plate with the central opening from the midline, and a limiting device 5 is used to connect the upper and lower steel plates on both sides of the central opening.

[0033] Among them, the upper energy dissipation plate 3 and the lower energy dissipation plate 4 are the upper and lower steel plates obtained by separating the entire energy dissipation steel plate from the midline. At this time, the limit device installed between the upper energy dissipation plate 3 and the lower energy dissipation plate 4 is equivalent to being located at the midpoint of the entire energy dissipation steel plate. The bending type damper is subjected to out-of-plane bending yield, and the inflection point appears at the midpoint of the energy dissipation steel plate. Therefore, setting a limit device at the midpoint can effectively overcome the out-of-plane bending yield of the bending type damper. When large deformation occurs, a thin film effect (in-plane stretching and lengthening) will occur, which has an adverse effect on the damper performance.

[0034] 1 to 3, the limiting device 5 in this embodiment is used to limit the in-plane deformation of the upper energy dissipation plate 3. When the upper energy dissipation plate 3 is bent and yielded out of the plane, a large deformation will occur. Figure 3 In-plane deformation in the direction of the middle arrow "→" occurs in the horizontal width direction of the upper energy dissipation plate 3, which can easily cause deformation on both sides of the width direction of the upper energy dissipation plate 3. The limiting device 5 adopts a slot form and includes a base plate 53 vertically fixed to the upper end surface of the lower energy dissipation plate 4 and first limiting plates 51 correspondingly attached to both sides of the width direction of the upper energy dissipation plate 2 and vertically fixed to the base plate 53. The two first limiting plates 51 are tightly pressed against the two side ends of the upper energy dissipation plate 3 with a tendency to in-plane deformation, thereby limiting the in-plane deformation of the upper energy dissipation plate 3. The height of the first limiting plates 51 is primarily considered to ensure the limiting effect. While ensuring the limiting effect, the first limiting plates are as small as possible to avoid affecting the normal use of the energy dissipation steel plate. In this embodiment, the height of the first limiting plates 51 is approximately 30 mm.

[0035] Furthermore, the slot also includes second limiting plates 52, corresponding to both sides of the thickness direction of the upper energy dissipation plate 3 and fixed perpendicularly to the bottom plate 53. The two ends of the first limiting plates 51 and the two ends of the second limiting plates 52 correspond to each other and are fixed perpendicularly to each other, forming a rectangular slot with a depth of approximately 30 mm. The lower end of the upper energy dissipation plate 3 is fixed in this slot.

[0036] Furthermore, a certain gap is left between the lower end surface of the upper energy dissipation plate 3 and the upper surface of the bottom plate 53 (such as Figure 1 The second gap 55 shown has a width of about 5 mm and is used to release the vertical deformation of the upper energy dissipation plate 3 .

[0037] In other embodiments, the limiting device may be a downward-opening slot, with the bottom plate fixed perpendicularly to the lower end surface of the upper energy dissipation plate. This can limit the in-plane deformation of the lower energy dissipation plate, and the other structures and principles are similar to those of Example 1. Alternatively, in other embodiments, the limiting device may be configured with slots on both sides underwater, thereby limiting the in-plane deformation of both the upper and lower energy dissipation plates.

[0038] Example 2:

[0039] See Figure 4 and Figure 5 As shown, in the curved metal damper of Example 2, only the width of the limiting device 5 is changed, increasing the width of the base plate 53. This allows for a certain gap (i.e., a first gap 54) to remain between the second limiting plates 52, which are vertically fixed on both sides of the base plate 53, and both sides of the upper energy dissipation plate 3. Adjusting the size of this gap enables the curved metal damper to achieve staged yielding. When the upper connecting plate is subjected to external force, the upper energy dissipation plate first undergoes staged yielding. Then, when the upper energy dissipation plate deforms in the thickness direction until it abuts against the second limiting plates 52 in the slot, the force is transmitted to the lower energy dissipation plate, which then undergoes staged yielding. This achieves staged yielding of the first and second energy dissipation plates, meeting the different yield requirements during minor and major earthquakes.

[0040] Example 3:

[0041] See Figure 6 As shown, in the curved metal damper of Example 3, in addition to Example 2, several adjustable bolts 6 are provided on the two second limiting plates 52. Adjusting the extension of the adjustable bolts 6 adjusts the size of the first gap 54, thereby controlling the onset of the second stage of yielding. This is because after the upper energy dissipation plate 3 yields and dissipates energy in the first stage until it hits the adjustable bolts 6, it continues to yield, driving the lower energy dissipation plate 4 to undergo a second stage of yielding. Therefore, the extension of the adjustable bolts 6 can control the onset of the second stage of yielding. The second limiting plates 3 are provided with several bolt holes, each of which is threaded into a corresponding bolt hole. One end of the adjustable bolt is inserted into the slot to contact the upper energy dissipation plate 3, which has yielded in place in the first stage.

[0042] Furthermore, multiple sets of upper energy dissipation plates 3, lower energy dissipation plates 4, and position limiting devices 5 are connected between the upper connecting plate 1 and the lower connecting plate 2. The first gaps 54 in each position limiting device 5 are not completely equal in size; the first gap 54 in at least one position limiting device 5 is zero. This results in different second-stage yield times across the entire curved metal damper, creating a multi-stage yield effect.

[0043] In addition to using adjustable bolts to push against the gap between the energy dissipation plate and the slot, the second limit plate can also be made movable and adjustable. A slide groove is provided on the bottom plate of the limit device, allowing the lower end of the second limit plate to move along the slide groove. After moving into position, a block is inserted into the slide groove for positioning (other positioning methods can also be used). The slide groove is set in a direction perpendicular to the energy dissipation plate. Alternatively, a plate or block of different thicknesses can be inserted into the inner side of the second limit plate instead of an adjusting bolt to push against the energy dissipation plate that has completed the first stage of yielding. This can also play a similar role as an adjustable bolt and adjust the size of the first gap.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A curved metal damper, characterized in that: It includes an upper energy dissipation plate fixedly connected to the upper connecting plate, a lower energy dissipation plate fixedly connected to the lower connecting plate, and a limiting device installed between the upper energy dissipation plate and the lower energy dissipation plate to limit the in-plane deformation of the upper energy dissipation plate and / or the lower energy dissipation plate; The limiting device is a card slot, which includes a bottom plate vertically fixed to the top of the lower energy consumption plate and a first limiting plate corresponding to both sides of the upper energy consumption plate in the width direction and vertically fixed to the bottom plate.

2. The curved metal damper according to claim 1, characterized in that: The clamping slot further includes second limiting plates corresponding to two sides of the upper energy consumption plate in a thickness direction and vertically fixed to the bottom plate.

3. The curved metal damper according to claim 2, characterized in that: Two ends of the first limiting plate are vertically connected to two ends of the second limiting plate.

4. The curved metal damper according to claim 2, characterized in that: A first gap is left between the second limiting plate and two sides of the upper energy dissipation plate.

5. The curved metal damper according to claim 4, characterized in that: The size of the first gap is adjustable.

6. The curved metal damper according to claim 5, characterized in that: An adjustable bolt is vertically connected to the second limiting plate, one end of the adjustable bolt extends into the first gap, and the size of the first gap is adjusted by adjusting the extension of the adjustable bolt.

7. The curved metal damper according to claim 1, characterized in that: A second gap is left between the bottom end of the upper energy dissipation plate and the bottom plate.

8. The curved metal damper according to claim 5, characterized in that: Multiple groups of the upper energy consumption plates, the lower energy consumption plates and the limiting devices are connected between the upper connecting plate and the lower connecting plate, and the sizes of the first gaps in each of the limiting devices are not completely equal, and the size of the first gap in at least one of the limiting devices is zero.

9. The curved metal damper according to any one of claims 1 to 8, characterized in that: The upper energy dissipation plate and the lower energy dissipation plate are two steel plates separated from the median line by any one of X-shaped, double X-shaped, diamond-shaped, triangular and rectangular steel plates.

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