Variable-order yield metal damper

Abstract

The present invention discloses a variable-order yield metal damper, comprising at least two metal yield units connected in series through an elastic separator, at least one end of the at least two metal yield units connected in series is connected to a joint member, and an elastic limiting device located on one side or both sides of the elastic separator is provided on the joint member, and the plastic deformation of the metal yield unit at the position is limited on one side or both sides by the elastic limiting device. Multiple metal yield units are connected in series by separating them with elastic separators to form multi-order yields, and elastic limiting devices are provided on one side or both sides of the position where the elastic separator is located, so that the plastic deformation of the metal yield unit at the position can be limited, causing the metal yield unit of the next order to enter yield energy consumption. Therefore, different yield forces are provided under different structural deformation conditions, so that the damper can adapt to the floor shear force under different earthquake conditions, thereby ensuring that the damper plays a stable protective role on the main structure.

Description

Technical Field

[0001] The invention relates to the technical field of building energy dissipation and shock absorption, and in particular to a variable-order yield metal damper. Background Art

[0002] By installing shear-type metal dampers at appropriate locations in frame or shear wall structures, seismic energy can be dissipated and structural response can be reduced. The damper generally dissipates energy before the main structure yields, thus protecting the main structure. However, traditional shear-type metal dampers only have one yield point. After the damper yields, the damping force increases slowly, while the floor shear force increases rapidly as the seismic force increases. The proportion of the damping force to the floor shear force gradually decreases, and the protective effect of the damper on the main structure will also be weakened accordingly. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the purpose of the present invention is to propose a variable-order yield metal damper, which has different yield forces under different structural deformation conditions, so that the damper can adapt to the floor shear force under different earthquake conditions, thereby ensuring that the damper plays a stable protective role on the main structure.

[0004] According to an embodiment of the present invention, the variable-order yield metal damper includes at least two metal yield units connected in series through an elastic separator, at least one end of the at least two metal yield units connected in series is connected to a joint member, and the joint member is provided with an elastic limiting device located on one side or both sides of the elastic separator, and the plastic deformation of the metal yield unit at the location is limited on one side or both sides by the elastic limiting device.

[0005] According to the variable-order yield metal damper of the embodiment of the present invention, at least two metal yield units are separated and connected in series by elastic separators to form multi-order yield. The elastic separators always maintain elasticity during the operation of the damper. An elastic limiting device is provided on one or both sides of the location of the elastic separators to limit the plastic deformation of the metal yield unit at the location, causing the next-order metal yield unit to enter yield energy consumption. Therefore, different yield forces are provided under different structural deformation conditions, so that the damper can adapt to the floor shear force under different earthquake conditions, thereby ensuring that the damper plays a stable protective role on the main structure.

[0006] In some embodiments of the present invention, the yield forces of the metal yield units are not completely equal.

[0007] In some embodiments of the present invention, the elastic separator is in an I-shape, a plate shape or a tube shape.

[0008] In some embodiments of the present invention, each of the metal yielding units includes two side flange plates and a yielding core plate connected between the two side flange plates, and the two ends of the yielding core plate not connected to the flange plates are connected to the elastic partition or the damper base plate.

[0009] In some embodiments of the present invention, the flange plates on the same side of each of the metal yielding units are integrally arranged, and the elastic separator is connected between adjacent yielding core plates and has two ends connected to the flange plates on both sides.

[0010] In some embodiments of the present invention, vertical stiffening ribs are fixed to one side surface of the yield core plate, and horizontal stiffening ribs are fixed to the other side surface, and grooves are formed on the vertical stiffening ribs at corresponding positions of the horizontal stiffening ribs.

[0011] In some embodiments of the present invention, the vertical stiffening ribs on each of the yielding core plates are vertically aligned, and a reinforcing plate vertically aligned with the vertical stiffening ribs is provided on the elastic partition.

[0012] In some embodiments of the present invention, the elastic limiting device includes an elastic pull plate, both ends of which are respectively connected to a first ear plate and a second ear plate by screws, the first ear plate is fixed to one side or both sides of the elastic separator, and the second ear plate is correspondingly fixed to one side or both sides of the joint member, and the screw holes on the first ear plate and / or the second ear plate for passing the screw are oblong holes opened along the length direction of the elastic pull plate.

[0013] In some embodiments of the present invention, the elastic limiting device adopts a relaxation plate or H-shaped steel, and the two ends of the relaxation plate are respectively connected to the joint piece and one side or both sides of the elastic separator; one end of the H-shaped steel is fixed to the joint piece, and a gap is left between the other end and one side or both sides of the elastic separator for plastic deformation of the metal yield unit at the location.

[0014] In some embodiments of the present invention, the connector is T-shaped and is provided with flange stiffening ribs corresponding to the position of the flange plate and pull plate stiffening ribs corresponding to the position of the elastic limiting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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.

[0016] Figure 1 It is a schematic diagram of a first embodiment of the variable-order yield metal damper of the present invention.

[0017] Figure 2 for Figure 1 1-1 cross-sectional view.

[0018] Figure 3 for Figure 1 2-2 cross-sectional view.

[0019] Figure 4 for Figure 1 3-3 cross-sectional view.

[0020] Figure 5 for Figure 2 Isolated schematic diagram of the vertical stiffener.

[0021] Figure 6 for Figure 1 Isolated schematic diagram of the elastic separator.

[0022] Figure 7 for Figure 1 An isolated schematic diagram of the elastic limit stop device.

[0023] Figure 8 for Figure 1 Isolated schematic diagram of the middle connector.

[0024] Fig. 9 It is a schematic diagram of a second embodiment of the variable-order yield metal damper of the present invention.

[0025] Fig.10 It is a schematic diagram of a third embodiment of the variable-order yield metal damper of the present invention.

[0026] Fig.11 It is a schematic diagram of a fourth embodiment of the variable-order yield metal damper of the present invention.

[0027] Fig.12 It is a schematic diagram of a fifth embodiment of the variable-order yield metal damper of the present invention.

[0028] Fig.13 It is a schematic diagram of the sixth embodiment of the variable-order yield metal damper of the present invention.

[0029] Fig.14 It is a schematic diagram of the seventh embodiment of the variable-order yield metal damper of the present invention.

[0030] Fig.15 It is a schematic diagram of the eighth embodiment of the variable-order yield metal damper of the present invention.

[0031] The corresponding relationship of the reference numerals is as follows:

[0032] 1-first-order yield core plate; 2-second-order yield core plate; 3-bottom plate; 4-flange plate; 5-first vertical stiffening rib; 6-second vertical stiffening rib; 7-horizontal stiffening rib; 8-elastic separator; 81-wing plate; 82-web plate; 83-reinforcement plate; 9-elastic limit device; 91-upper ear plate; 92-lower ear plate; 93-elastic pull plate; 94-long screw; 10-connector; 101-top plate; 102-flange stiffening rib; 103-pull plate stiffening rib; 11-relaxed pull plate; 12-H-shaped steel. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0034] See also Figures 1 to 8 , an embodiment of the present invention provides a variable-order yield metal damper, which mainly includes flange plates 4 on the left and right sides and a first-order yield core plate 1 and a second-order yield core plate 2 connected between the flange plates 4 on the left and right sides. Among them, the first-order yield core plate 1 is at the bottom, and the second-order yield core plate 2 is at the top. The height of the first-order yield core plate 1 is less than the height of the second-order yield core plate 2, and the thickness of the first-order yield core plate 1 is also slightly less than the thickness of the second-order yield core plate 2. Of course, the size and thickness can be appropriately changed according to actual needs, and are not limited to the situation shown in the embodiment. In addition to the different heights and thicknesses, they can also be designed to have different yield strengths, which is intended to illustrate that the yield forces of a first-order yield core plate and a second-order yield core plate can be different. The flange plates 4 on the left and right sides of the first-order yield core plate 1 and the second-order yield core plate 2 preferably adopt an uninterrupted one-piece design to ensure the continuity of force transmission. However, in some cases, the flange plates can also be separated, but the stiffness of the first-order yield core plate 1 below needs to meet certain requirements, such as Fig.10 As shown, two yield core plates of different widths are used, wherein the width of the first-order yield core plate 1 is smaller than the width of the second-order yield core plate 2. At this time, the flange plates on both sides cannot be arranged into an integrated structure, and the flange plates 4 on both sides of the second-order yield core plate 2 extend downward to both sides of the elastic partition 8, and are respectively connected to one end of the elastic limit device 9, and the other end of the elastic limit device 9 is connected to the joint member 10.

[0035] Back to Figures 1 to 8In the embodiment shown, the top of the first-order yield core plate 1 and the bottom of the second-order yield core plate 2 are separated by an elastic separator 8, the bottom of the first-order yield core plate 1 is connected to a joint member 10 connected to an external member, and an elastic limiting device 9 is provided between the joint member 10 and the flange plate 4 where the elastic separator 8 is located. The elastic limiting device 9 is used to limit the plastic deformation of the first-order yield core plate 1 on one side or on both sides, so an elastic limiting device 9 can be provided on both sides of the first-order yield core plate 1, or only one elastic limiting device 9 can be provided on one side, such as Fig. 9 As shown, depending on the actual force and limit requirements, it is obvious that the solution with limits on both sides has a better limit effect.

[0036] According to the variable-order yield metal damper of the embodiment of the present invention, by separating the first-order yield core plate and the second-order yield core plate with an elastic separator, and arranging elastic limiting devices on the outer sides of the flange plates on both sides where the elastic separator is located, when the first-order yield core plate yields and enters plasticity, the elastic limiting devices can be used to laterally limit the plastic deformation of the first-order yield core plate, so that the second-order yield core plate gradually enters the yield energy consumption and enters plasticity, and the plasticity of the first-order yield core plate basically no longer increases, thereby achieving variable order. On the basis of the embodiment of the present invention, it is easy to think of the design idea of ​​further accumulating third-order, fourth-order, or even more-order yield core plates on the basis of first-order and second-order yield core plates, arranging elastic separators between two adjacent order yield core plates for separation, and then arranging elastic limiting devices at the separation point to laterally limit the plastic deformation of the yield core plate, so as to achieve multi-order changes of the metal damper, and this multi-order change method should also be protected by the present invention.

[0037] Furthermore, the bottom of the first-order yield core plate 1 and the top of the second-order yield core plate 2 are respectively welded vertically to the damper bottom plate 3, and the two ends of the bottom plate 3 are respectively welded to the flange plates 4 on the left and right sides, and the length of the bottom plate 3 is equal to the width of the first-order yield core plate 1 and the second-order yield core plate 2, and the width of the bottom plate 3 is significantly greater than the thickness of the first-order yield core plate 1 and the second-order yield core plate 2, and the first-order yield core plate 1 and the second-order yield core plate 2 are located on the midline of the width of the bottom plate 3. Among them, the lower surface of the bottom plate 3 at the bottom of the first-order yield core plate 1 is welded and fixed to the middle position of the top upper surface of the joint member 10.

[0038] The vertically aligned first vertical stiffening rib 5 and the second vertical stiffening rib 6 are welded and fixed at the vertical midline position of one side surface of the first-order yield core plate 1 and the second-order yield core plate 2. Three horizontal stiffening ribs 7 are also welded and fixed on the other side surface of the second-order yield core plate 2. The reason is that the height of the second-order yield core plate 2 is relatively large, and the setting of the horizontal stiffening ribs 7 can strengthen the strength of the second-order yield core plate 2. The first vertical stiffening rib 5 and the second vertical stiffening rib 6 also serve to strengthen the strength of the core plate. Preferably, the second vertical stiffening rib 6 is formed with an arc-shaped groove at the corresponding position of the horizontal stiffening rib 7, in order to avoid damage to the core plate by the cross weld.

[0039] The elastic separator 8 is in an I-shaped shape, and its purpose is to separate the first-order yield core plate 1 from the second-order yield core plate 2. The two wing plates 81 at the bottom and top of the I-shaped elastic separator 8 are respectively vertically connected to the top of the first-order yield core plate 1 and the bottom of the second-order yield core plate 2, and the two ends of the elastic separator 8 are respectively welded and fixed to the flange plates 4 on both sides. The web 82 of the I-shaped elastic separator 8 is vertically aligned with the first-order yield core plate 1 and the second-order yield core plate 2. A reinforcing plate 83 is also vertically connected between the two I-shaped wing plates 81 and the middle web 82. The reinforcing plate 83 is located at the midline position of the elastic separator 8, and is vertically aligned with the first vertical reinforcing rib 5 and the second vertical reinforcing rib 6 on the first-order yield core plate 1 and the second-order yield core plate 2, so as to achieve a direct force transmission effect. The elastic separator can also be made of thick steel plates, steel pipes or other structural I-shaped steels. During the operation of the damper, the elastic separator always remains elastic.

[0040] Furthermore, the connector 10 used for connecting with the external component is T-shaped, and the T-shaped connector 10 can better transfer the tension on the damper flange plate to the external component connected thereto, such as a frame or shear wall structure. The damper flange plate and the elastic limit device are respectively fixed on the horizontal top plate of the T-shaped connector 10, and two flange stiffening ribs 102 and two pull plate stiffening ribs 103 are welded and fixed between the two sides of the vertical middle plate of the T-shaped connector 10 and its top plate, wherein the two flange stiffening ribs 102 correspond to the positions of the left and right flange plates of the damper, respectively, and can effectively transfer the tension on the flange plate to the external component connected thereto through the flange stiffening ribs 102. Similarly, the position of the pull plate stiffening rib 103 corresponds to the elastic limit device, and can effectively transfer the tension of the elastic limit device to the external component connected thereto.

[0041] The elastic limiting device 9 in this embodiment includes an upper ear plate 91, a lower ear plate 92, an elastic pull plate 93 and a long screw 94, wherein the upper ear plate 91 is welded to the damper flange plate 4, and a bolt hole is opened on the upper ear plate 91. There are multiple upper ear plates 91 (three in this embodiment). The lower ear plate 92 is connected to the joint member 10, and a long bolt hole is opened on the lower ear plate 92. There are multiple lower ear plates 92 (three in this embodiment), and there is one elastic pull plate 93. When the elastic limiting device plays a limiting role, the elastic pull plate 93 remains elastic and does not yield. The two ends of the elastic pull plate 93 are movably connected to the bolt holes and long bolt holes of the middle upper ear plate 91 and the middle lower ear plate 92 through long screws 94. The long screws 94 simultaneously pass through the bolt holes of the three upper ear plates 91 and the long bolt holes of the three lower ear plates 92, and the upper ear plate 91, the lower ear plate 92 and the elastic pull plate 93 are connected in series through the long screws 94. After the first-order yield core plate 1 yields, it enters plasticity, and slides in the long bolt hole of the lower ear plate 92 through the long screw 94. After the long screw reaches the limit, it is clamped in the long bolt hole, and the elastic pull plate 93 in the elastic limit device is tightened to start working (when working in the reverse direction, it is clamped after reaching the limit, and the elastic limit device is under pressure); after the elastic pull plate 93 is tightened, the second-order yield core plate 2 gradually enters the yield energy consumption and enters plasticity, and the plasticity of the first-order yield core plate 1 basically no longer increases. The elastic limit device can be set on the damper on one side or on both sides. When it is set on both sides, one side is pulled by hand and the other side is under pressure. Among them, the long bolt hole on the lower ear plate can also be replaced on the upper ear plate. At this time, the long screw slides in the long bolt hole of the upper ear plate, and the working principle is exactly the same.

[0042] See also Figures 11 to 13 , which is another embodiment of the variable order yield metal damper of the present invention, the other features remain unchanged, only the elastic limiting device is replaced by a limiting form of a relaxation plate 11, the two ends of the relaxation plate 11 are respectively connected to the outer side of the damper flange plate where the elastic partition is located and the upper surface of the joint member, and the relaxation plate 11 can also be set on one side or on both sides. Fig.11 The figure shows a single-side limit. Fig.12 and Fig.13 The figure shows a double-sided limit, where: Fig.12 The width of the two yielding core plates is consistent, and the flange plates on both sides are set as one piece, so the force transmission is more continuous; Fig.13 The widths of the two yielding core plates shown are one large and one small, and the flange plates on both sides cannot be set through the entire length, but are separated at the elastic separator. The relaxed tension plate 11 is in a relaxed state in the initial state. After the first-order yielding core plate of the damper yields, it enters the plastic state and undergoes horizontal shear deformation. Then, the tension plate on one side is also stretched. When the tension plate is stretched to a certain displacement, the tension plate is tightened. At this time, the second-order yielding core plate gradually yields and consumes energy, and the plasticity of the first-order yielding core plate basically does not increase.

[0043] See also Fig.14 and Fig.15 , which is a variable-order yield metal damper of another embodiment of the present invention. Similarly, other features remain unchanged, and only the elastic limiting device is replaced by a limiting form of H-shaped steel 12. The lower end of the H-shaped steel 12 is fixed to the upper surface of the joint member and is close to the position of the first-order yield core plate. A gap is left between the upper end of the H-shaped steel 12 and the damper flange plate 4 for the plastic deformation of the first-order yield core plate. The H-shaped steel 12 is provided with a top block at the position corresponding to the elastic partition. When the first-order yield core plate yields, it enters plasticity and undergoes horizontal shear deformation. When the flange plate and the top block of the H-shaped steel on one side are completely pressed against each other, the second-order yield core plate gradually yields and consumes energy, and the plasticity of the first-order yield core plate basically no longer increases. Similarly, the H-shaped steel 12 in the above embodiment, as an elastic limiting device, can be applied to the case of a multi-order yield core plate with uniform width and integrally arranged flange plates on both sides, such as Fig.14 As shown in the figure, it can also be applied to the case of multi-order yielding core plates with different widths and flange plates on both sides arranged in blocks, such as Fig.15 shown.

[0044] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable-order yield metal damper, characterized in that: The invention comprises at least two metal yield units connected in series through an elastic separator, at least one end of the at least two metal yield units connected in series is connected to a joint member, and the joint member is provided with an elastic limiting device located on one side or both sides of the elastic separator, and the plastic deformation of the metal yield unit at the position is limited on one side or both sides by the elastic limiting device; The yield forces of the metal yield units are not completely equal; Each of the metal yielding units comprises two side flange plates and a yielding core plate connected between the two side flange plates, and two ends of the yielding core plate not connected to the flange plates are connected to the elastic partition or the damper bottom plate; The yield core plate comprises a first-order yield core plate and a second-order yield core plate, wherein the height of the first-order yield core plate is less than the height of the second-order yield core plate; The elastic limiting device is one of the following two types: The elastic limiting device comprises an elastic pull plate, the two ends of which are respectively connected to a first ear plate and a second ear plate by screws, the first ear plate is fixed to one side or both sides of the elastic separator, and the second ear plate is correspondingly fixed to one side or both sides of the connector, and the screw hole on the first ear plate and / or the second ear plate for the screw to pass through is an oblong hole opened along the length direction of the elastic pull plate; or The elastic limiting device adopts a relaxation plate or H-shaped steel, and the two ends of the relaxation plate are respectively connected to the joint piece and one side or both sides of the elastic separator; one end of the H-shaped steel is fixed to the joint piece, and a gap is left between the other end and one side or both sides of the elastic separator for plastic deformation of the metal yield unit at the location.

2. The variable-order yield metal damper according to claim 1, characterized in that: The elastic separator is in an I-shape, a plate shape or a tube shape.

3. The variable-order yield metal damper according to claim 1, characterized in that: The flange plates on the same side of each of the metal yielding units are integrally arranged, and the elastic separator is connected between adjacent yielding core plates and has two ends connected to the flange plates on both sides.

4. The variable-order yield metal damper according to claim 1, characterized in that: A vertical stiffening rib is fixed on one side surface of the yield core plate, and a horizontal stiffening rib is fixed on the other side surface, and grooves are formed on the vertical stiffening ribs at corresponding positions of the horizontal stiffening ribs.

5. The variable-order yield metal damper according to claim 4, characterized in that: The vertical stiffening ribs on each of the yielding core plates are vertically aligned, and a reinforcing plate vertically aligned with the vertical stiffening ribs is provided on the elastic partition.

6. The variable-order yield metal damper according to claim 1, characterized in that: The joint piece is T-shaped and is provided with flange stiffening ribs corresponding to the position of the flange plate and pull plate stiffening ribs corresponding to the position of the elastic limiting device.

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