Third-order metal yield damper

Abstract

The present invention relates to a three-order metal yield type damper, comprising: a first damping structure capable of yielding energy consumption, comprising two opposite ends arranged along a first direction and two opposite sides arranged along a second direction, the first direction and the second direction being perpendicular to each other; a second damping structure capable of yielding energy consumption, connected to the opposite ends of the first damping structure, the yield strength of the second damping structure being greater than the yield strength of the first damping structure; a pair of arc plates, arranged at the opposite ends of the first damping structure, and the two ends of the arc plates are correspondingly fixed to the opposite ends of the first damping structure, after the first damping structure yields, the stiffness is increased by the arc plates, thereby ensuring that the force is transmitted to the second damping structure for yielding, and realizing step-by-step yielding. The present invention can yield energy consumption under small earthquakes, has a large output under medium and large earthquakes, and has a strong ultimate deformation capacity, and has good staged yielding capacity under small and large earthquakes.

Description

Technical Field

[0001] The invention relates to the field of dampers, in particular to a third-order metal yield type damper. Background Art

[0002] Metal yield damper refers to a displacement-related damper that uses the plastic deformation of metal to dissipate energy. Plastic deformation refers to the inability of a material to return to its original state after being deformed by an external force beyond a certain limit. When the stress reaches a certain value, the deformation increases sharply even though the stress does not increase (or fluctuates within a small range), which is called the yield phenomenon.

[0003] At present, most metal yield dampers are difficult to meet the requirements of both small earthquakes and medium and large earthquakes. Some metal yield dampers can yield and dissipate energy under small earthquakes, but the stiffness after yielding is small, which is not good for building structures; and the ultimate deformation under large earthquakes is often limited. The design yield displacement of some metal yield dampers is large, which can only play an energy dissipation and shock reduction role under large earthquakes, but in small earthquakes, they are in an elastic state and cannot yield and dissipate energy (only provide stiffness), making it difficult to give full play to the energy dissipation effect of the damper.

[0004] Therefore, there is an urgent need for a damper that can yield and dissipate energy under small earthquakes, have a large output under medium and large earthquakes, and have a strong ultimate deformation capacity. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a third-order metal yield type damper to solve the problem that the metal yield type damper in the prior art is difficult to simultaneously meet the requirements of small earthquakes and medium to large earthquakes.

[0006] The technical solution to achieve the above purpose is:

[0007] The present invention provides a third-order metal yield damper, comprising:

[0008] A first damping structure capable of yielding energy dissipation has two opposite ends arranged along a first direction and two opposite sides arranged along a second direction, wherein the first direction and the second direction are perpendicular to each other;

[0009] a second damping structure capable of yielding and dissipating energy, connected to opposite ends of the first damping structure, the yield strength of the second damping structure being greater than the yield strength of the first damping structure, and the second damping structure having a mounting end for connection with a building structure and arranged along a first direction;

[0010] A pair of arc plates are arranged on opposite sides of the first damping structure, and the two ends of the arc plates are fixedly connected to the opposite ends of the first damping structure. After the first damping structure yields, the stiffness is increased by the arc plates, thereby ensuring that the force is transmitted to the second damping structure for yielding, thereby realizing step-by-step yielding.

[0011] A further improvement of the third-order metal yield damper of the present invention is that the first damping structure comprises:

[0012] The first core board;

[0013] a pair of first end plates vertically fixed to opposite ends of the first core plate;

[0014] A pair of first wing plates are vertically fixed to opposite sides of the first core plate, and the first wing plates are vertically fixed to a pair of the first end plates.

[0015] A further improvement of the third-order metal yield damper of the present invention is that the second damping structure comprises:

[0016] A second core plate vertically fixed to the first end plate;

[0017] A second end plate vertically fixed to the second core plate and parallel to the first end plate;

[0018] A pair of second wing plates are vertically fixed to opposite sides of the second core plate, and the second wing plates are vertically fixed to the second end plate and the first end plate.

[0019] A further improvement of the third-order metal yield damper of the present invention is that:

[0020] The second core plate has a thickness greater than a thickness of the first core plate.

[0021] A further improvement of the third-order metal yield damper of the present invention is that:

[0022] The second core plate has a strength greater than that of the first core plate.

[0023] A further improvement of the third-order metal yield damper of the present invention is that:

[0024] The second wing plate and the first wing plate are located on the same vertical line.

[0025] A further improvement of the third-order metal yield damper of the present invention is that:

[0026] Two ends of the arc-shaped plate are fixedly connected to edges of a pair of the first end plates respectively.

[0027] A further improvement of the third-order metal yield damper of the present invention is that the first damping structure further comprises:

[0028] a first transverse stiffening plate transversely fixed to the first core plate, wherein opposite ends of the first transverse stiffening plate are fixed to corresponding first wing plates;

[0029] A first longitudinal stiffening plate is longitudinally fixed to the first core plate, and opposite ends of the first longitudinal stiffening plate are correspondingly fixed to a pair of first end plates.

[0030] A further improvement of the third-order metal yield damper of the present invention is that the second damping structure further includes:

[0031] a second transverse stiffening plate transversely fixed to the second core plate, wherein opposite ends of the second transverse stiffening plate are fixed to corresponding second wing plates;

[0032] A second longitudinal stiffening plate is longitudinally fixed to the second core plate, and opposite ends of the second longitudinal stiffening plate are correspondingly fixed to the first end plate and the second end plate.

[0033] A further improvement of the third-order metal yield damper of the present invention is that the thickness or width of the two ends where the arc plate and the first damping structure are fixedly connected is greater than the thickness or width of the rest of the arc plate.

[0034] Beneficial effects of the third-order metal yield damper of the present invention:

[0035] The three-order metal yielding damper of the present invention can yield and dissipate energy under small earthquakes, and has strong ultimate deformation capacity under medium and large earthquakes, and has good staged yielding capacity under small and large earthquakes. The present invention can solve the problem that the metal yielding damper in the prior art is difficult to meet the requirements of small earthquakes and medium and large earthquakes at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a front view of the third-order metal yield damper of the present invention.

[0037] Figure 2 for Figure 1 AA cross-sectional view.

[0038] Figure 3 for Figure 1 A cross-sectional view of the BB.

[0039] Figure 4 for Figure 1 Cross-sectional view of CC. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0041] See also Figure 1 , showing the front view of the third-order metal yield damper of the present invention. Figure 2 for Figure 1 AA cross-sectional view of. Figure 1 and Figure 2 As shown, the third-order metal yield damper of the present invention comprises:

[0042] The first damping structure 10 capable of yielding energy dissipation has two opposite ends arranged along a first direction and two opposite sides arranged along a second direction, and the first direction and the second direction are perpendicular to each other;

[0043] A second damping structure 20 capable of yielding energy dissipation is connected to opposite ends of the first damping structure 10, the yield strength of the second damping structure 20 is greater than the yield strength of the first damping structure 10, and the second damping structure 20 has a mounting end for connection with the building structure and arranged along the first direction;

[0044] A pair of arc plates 30 are arranged on opposite sides of the first damping structure 10, and the two ends of the arc plates 30 are fixedly connected to the opposite ends of the first damping structure 10. After the first damping structure yields, the stiffness is increased by the arc plates, thereby ensuring that the force is transmitted to the second damping structure for yielding, thereby realizing step-by-step yielding.

[0045] The third-order metal yield damper of the present invention has good staged yielding ability under small and large earthquakes. Specifically, the yield strength of the first damping structure is less than the yield strength of the second damping structure, so under small earthquakes, the first damping structure is first used to yield and dissipate energy, providing an additional damping ratio for the structure and reducing the seismic force of the main structure. The stiffness of the first damping structure is reduced after yielding. Since the arc plate has elasticity and stiffness and the arc plate is connected in parallel with the first damping structure, the arc plate is used to increase the stiffness of the first damping structure after yielding to ensure that force can be transmitted to the second damping structure, so that the second damping structure can yield under medium and large earthquakes. The principle of increasing stiffness by an arc plate is similar to that of an arch bridge, and the chord length of the arc plate is equal to the height of the first damping structure.

[0046] In addition, according to the characteristics: actual output = yield force + stiffness after yield × (displacement - yield displacement), the actual output refers to the resultant force actually transmitted by the first damping structure to the second dampers at both ends. In the above process, yielding consumes energy under small earthquakes, and the stiffness of the first damping structure after yielding is small. If the overall stiffness is not increased by the arc plate, it will be difficult to transmit the actual output to the second damping structure. Under medium and large earthquakes, the second damping structure may be difficult to yield, which is not conducive to the development of the structure under subsequent medium and large earthquakes. That is, if the three damping structures are simply and directly superimposed and used, the stiffness of the middle damping structure will decrease after yielding, and it will be impossible to transmit force to the damping structures at both ends, and the damping structures at both ends will be difficult to yield. Therefore, the present invention is different from directly superimposing the three damping structures and has different effects.

[0047] Under moderate to large earthquakes, the arc plate itself can be used as a curved damper to yield and dissipate energy. Moreover, because the yield of the arc plate is not the yield of the entire cross section, the stiffness degradation is not large, ensuring that the force can be transmitted to the second damping structure for yielding and dissipating energy. The damper of the present invention can jointly yield and dissipate energy through the first damping structure, the second damping structure and the arc plate. The damper of the present invention has a strong ultimate deformation capacity and is suitable for structures with large floor heights and large inter-story displacement angles, and the damper deforms greatly under large earthquakes. The present invention can solve the problem that the metal yield-type damper in the prior art is difficult to simultaneously meet the requirements of small earthquakes and moderate to large earthquakes.

[0048] As a preferred embodiment of the third-order metal yield damper of the present invention, refer to Figure 3 for Figure 1 A cross-sectional view of the BB. Figure 4 for Figure 1 Cross-sectional view of CC. Figures 1 to 4 As shown, the first damping structure 10 includes: a first core plate 11; a pair of first end plates 12 vertically fixed to opposite ends of the first core plate 11; a pair of first wing plates 13 vertically fixed to opposite sides of the first core plate 11, and the first wing plates 13 are vertically fixed to the pair of first end plates 12. The first core plate 11, the first end plate 12, and the first wing plate 13 are all rectangular plates.

[0049] As a preferred embodiment of the third-order metal yield type damper of the present invention, the second damping structure 20 includes: a second core plate 21 vertically fixed to the first end plate 12; a second end plate 22 vertically fixed to the second core plate 21 and parallel to the first end plate 12; a pair of second wing plates 23 vertically fixed to opposite sides of the second core plate 21, and the second wing plates 23 are vertically fixed to the second end plate 22 and the first end plate 12. The second core plate 21, the second end plate 22, and the second wing plates 23 are all rectangular plates.

[0050] As a preferred embodiment of the third-order metal yield damper of the present invention, the thickness of the second core plate 21 is greater than the thickness of the first core plate 11 to ensure that when the damper of the present invention is in use, the first damping structure 10 located in the middle first yields and dissipates energy.

[0051] As a preferred embodiment of the third-order metal yield type damper of the present invention, the strength of the second core plate 21 is greater than the strength of the first core plate 11 to ensure that when the damper of the present invention is in use, the first damping structure 10 located in the middle yields and dissipates energy first.

[0052] Furthermore, the second wing plate 23 and the first wing plate 13 are located on the same vertical line, and the force is stable.

[0053] Further, the two ends of the arc plate 30 are fixedly connected to the edges of the pair of first end plates 12. Specifically, the arc plate 30 is a U-shaped structure. The openings of the two arc plates 30 are arranged opposite to each other, and the two arc plates 30 are symmetrically arranged on the opposite sides of the first damping structure 10, so as to sandwich the first damping structure 10 in the middle.

[0054] Furthermore, the thickness or width of the two ends where the arc plate and the first damping structure are fixedly connected is greater than the thickness or width of the rest of the arc plate. Specifically, the arc plate 30 is fixedly connected to the first end plate 12; the stress and bending moment at the junction of the two are the largest, and the stress level at the end of the arc plate 30 is reduced by increasing the thickness or making it wider.

[0055] The thickness of the arc-shaped plate 30 may be uniform to facilitate processing, or may be thick at both ends and thin in the middle, or may be wide at both ends and narrow in the middle.

[0056] Further, the chord length of the arc plate 30 is equal to the height of the first damping structure. The width of the arc plate 30 is consistent with the width of the first end plate 12 of the first damping structure. The width of the first wing plate 13 is calculated according to actual needs.

[0057] Under moderate to large earthquakes, the curved plate is similar to the curved steel damper, and can also yield and dissipate energy, and the yield is local, and the yield of the curved plate gradually extends from the end to the middle of the bend. The curved steel damper in the prior art is composed of multiple curved steel elements in parallel, and its mechanical behavior is consistent with that of the curved steel elements.

[0058] As a preferred embodiment of the third-order metal yield type damper of the present invention, the first damping structure 10 further includes: a first transverse stiffening plate 14 transversely fixed to the first core plate 11, and the opposite ends of the first transverse stiffening plate 14 are fixed to the corresponding first wing plates 13; a first longitudinal stiffening plate 15 longitudinally fixed to the first core plate 11, and the opposite ends of the first longitudinal stiffening plate 15 are correspondingly fixed to a pair of first end plates 12. The first transverse stiffening plate 14 and the first longitudinal stiffening plate 15 increase the out-of-plane stiffness of the first core plate 11 and improve the seismic performance.

[0059] As a preferred embodiment of the third-order metal yield type damper of the present invention, the second damping structure 20 also includes: a second transverse stiffening plate 24 transversely fixed to the second core plate 21, and the opposite ends of the second transverse stiffening plate 24 are fixed to the corresponding second wing plate 23; a second longitudinal stiffening plate 25 longitudinally fixed to the second core plate 21, and the opposite ends of the second longitudinal stiffening plate 25 are correspondingly fixed to the first end plate 12 and the second end plate 22. The second transverse stiffening plate 24 and the second longitudinal stiffening plate 25 increase the out-of-plane stiffness of the second core plate 21 and improve the seismic performance.

[0060] Specifically, the first core plate 11 is made of mild steel, such as LY100 and LY160. Mild steel is a type of low-carbon steel with a low carbon content of 0.13% to 0.20% and a slightly lower hardness.

[0061] The second core plate 21 is a mild steel having a strength greater than that of the first core plate 11, or the second core plate 21 is a common steel. The arc plate 30 is a common steel having a relatively high strength. Common steel is a general term for ferroalloys having a carbon content of 0.02% to 2.04% by mass.

[0062] The use of the third-order metal yield damper of the present invention is described below:

[0063] The installation ends of the two second damping structures 20 are connected to the building structure, so that the third-order metal yield type damper of the present invention is installed in the building structure.

[0064] Under the action of the first stage of small earthquake, since the strength of the first core plate 11 is less than that of the second core plate 21, the first damping structure 10 first utilizes the plastic deformation of the first core plate 11 to dissipate energy and yield energy. After yielding, the stiffness of the first damping structure 10 decreases rapidly. At this time, the stiffness of the first damping structure 10 is improved by the arc plate 30. The arc plate 30 maintains elasticity and acts together with the first damping structure 10 to increase the force of the third-order metal yield damper of the present invention, which is beneficial to improving the seismic performance of the building structure.

[0065] When the stress of the third-order metal yield type damper of the present invention in the first stage continues to increase to a certain extent, the second damping structure 20 begins to use the plastic deformation of the second core plate 21 to consume energy and perform yield energy consumption, entering the second stage. In this stage, the first damping structure 10 and the two second damping structures 20 both perform yield energy consumption, and the arc plate 30 still maintains elasticity, continuously increasing the stiffness of the damper after yielding. The arc plate 30, the first damping structure 10, and the second damping structure 20 work together to further increase the stress of the third-order metal yield type damper of the present invention, which is beneficial to improving the seismic performance of the building structure.

[0066] When the force of the third-order metal yield type damper of the present invention continues to increase to a certain extent in the second stage, the arc plate 30 yields and consumes energy, entering the third stage. In this stage, the deformation of the damper is the sum of the deformations of the first damping structure 10, the two second damping structures 20, and the arc plate 30, which can reach a very large limit deformation. The present invention has good staged yielding ability under small and large earthquakes. The present invention is suitable for structures with large storey heights, large inter-storey displacement angles, and situations where the damper deforms greatly under large earthquakes.

[0067] The beneficial effects of the third-order metal yield damper of the present invention are:

[0068] The three-order metal yielding damper of the present invention can yield and dissipate energy under small earthquakes, has a large output under medium and large earthquakes and has a strong ultimate deformation capacity, and has good staged yielding capacity under small and large earthquakes. The present invention can solve the problem that the metal yielding damper in the prior art is difficult to meet the requirements of small earthquakes and medium and large earthquakes at the same time.

[0069] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A third-order metal yield damper, characterized in that: include: A first damping structure capable of yielding energy dissipation has two opposite ends arranged along a first direction and two opposite sides arranged along a second direction, wherein the first direction and the second direction are perpendicular to each other; a second damping structure capable of yielding and dissipating energy, connected to opposite ends of the first damping structure, the yield strength of the second damping structure being greater than the yield strength of the first damping structure, and the second damping structure having a mounting end for connection with a building structure and arranged along a first direction; A pair of arc plates are arranged on opposite sides of the first damping structure, and the two ends of the arc plates are fixedly connected to the opposite ends of the first damping structure. After the first damping structure yields, the stiffness is increased by the arc plates, thereby ensuring that the force is transmitted to the second damping structure for yielding, thereby realizing step-by-step yielding.

2. The third-order metal yield damper according to claim 1, characterized in that: The first damping structure comprises: The first core board; a pair of first end plates vertically fixed to opposite ends of the first core plate; A pair of first wing plates are vertically fixed to opposite sides of the first core plate, and the first wing plates are vertically fixed to a pair of the first end plates.

3. The third-order metal yield damper according to claim 2, characterized in that: The second damping structure comprises: A second core plate vertically fixed to the first end plate; A second end plate vertically fixed to the second core plate and parallel to the first end plate; A pair of second wing plates are vertically fixed to opposite sides of the second core plate, and the second wing plates are vertically fixed to the second end plate and the first end plate.

4. The third-order metal yield damper according to claim 3, characterized in that: The second core plate has a thickness greater than a thickness of the first core plate.

5. The third-order metal yield damper according to claim 3, characterized in that: The second core plate has a strength greater than that of the first core plate.

6. The third-order metal yield damper according to claim 3, characterized in that: The second wing plate and the first wing plate are located on the same vertical line.

7. The third-order metal yield damper according to claim 2, characterized in that: Two ends of the arc-shaped plate are correspondingly fixed to edges of a pair of the first end plates.

8. The third-order metal yield damper according to claim 2, characterized in that: The first damping structure further comprises: a first transverse stiffening plate transversely fixed to the first core plate, wherein opposite ends of the first transverse stiffening plate are fixed to corresponding first wing plates; A first longitudinal stiffening plate is longitudinally fixed to the first core plate, and opposite ends of the first longitudinal stiffening plate are correspondingly fixed to a pair of first end plates.

9. The third-order metal yield damper according to claim 3, characterized in that: The second damping structure further comprises: a second transverse stiffening plate transversely fixed to the second core plate, wherein opposite ends of the second transverse stiffening plate are fixed to corresponding second wing plates; A second longitudinal stiffening plate is longitudinally fixed to the second core plate, and opposite ends of the second longitudinal stiffening plate are correspondingly fixed to the first end plate and the second end plate.

10. The third-order metal yield damper according to claim 1, characterized in that: The thickness or width of the two ends where the arc-shaped plate and the first damping structure are fixedly connected is greater than the thickness or width of the remaining part of the arc-shaped plate.

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