Buckling-preventing multi-stage energy dissipation metal damper

Abstract

The utility model provides an anti-buckling multi-stage energy dissipation metal damper, and relates to the technical field of shock absorption structures. The shear energy consumption plate is arranged between the upper connecting plate and the lower connecting plate; triangular energy consumption plates perpendicular to the shearing energy consumption plate are oppositely arranged on the two sides of the shearing energy consumption plate, the bottom ends of the triangular energy consumption plates are connected with the lower connecting plate, and gaps are formed between the upper ends of the triangular energy consumption plates and the upper connecting plate; the bottom face of the upper connecting plate is connected with a plurality of top plate blocks, and the top plate blocks are symmetrically distributed on the two sides of the upper end of the triangular energy consumption plate so that the top plate blocks can make contact with the triangular energy consumption plate when the shearing energy consumption plate is stressed and bent to the corresponding degree, and the triangular energy consumption plate can be stressed. By means of the scheme, the energy dissipation capacity and adaptability of the metal damper are improved, and therefore the requirements under different earthquake conditions are better met.

Description

Technical Field

[0001] The utility model relates to the technical field of shock-absorbing structures, in particular to an anti-buckling multi-stage energy-consuming metal damper. Background Art

[0002] The seismic design method of traditional buildings mainly relies on the stiffness, strength and ductility of the load-bearing structure itself to resist earthquakes in order to meet the three-level performance goals of "no damage in small earthquakes, repairable in medium earthquakes, and no collapse in large earthquakes". Although the seismic design method of traditional buildings can ensure that the buildings do not collapse, the damage caused by earthquakes is difficult to repair and will still cause serious damage to human property. Different from the seismic design method of traditional buildings, the energy dissipation and shock reduction technology mainly installs dampers in the weak parts of the main structure that are prone to damage. Under the action of earthquakes, the damper produces plastic deformation before the main structure to dissipate energy to reduce the seismic response and achieve the seismic design goals. According to the different energy dissipation mechanisms, dampers can be divided into friction dampers, viscous dampers, metal dampers, etc. Among them, metal dampers are widely used in actual engineering because of their easy replacement, good ductility, strong energy dissipation capacity and low price.

[0003] Metal dampers have different energy dissipation characteristics: the initial stiffness of shear dampers is large and the yield displacement is small, but in the case of a large earthquake, the shear energy dissipation plate is prone to out-of-plane buckling, resulting in a decrease in its bearing capacity and energy dissipation capacity. Therefore, anti-buckling measures are needed to improve the energy dissipation capacity of shear dampers. The energy dissipation capacity of bending dampers is stable, but the bearing capacity and stiffness are low. In order to achieve the goal of earthquake fortification, more manufacturing materials are required, which is easy to cause waste and the damper is too heavy, making it difficult to install.

[0004] Traditional metal dampers have a single energy dissipation level and cannot take into account the requirements of both low-intensity earthquakes and strong earthquakes. For metal dampers with large yield displacement, under the action of low-intensity earthquakes, due to their large yield displacement, they can only maintain an elastic state and cannot play the function of energy dissipation. In this case, the energy dissipation of the damper is very limited, and it cannot fully absorb and disperse the seismic energy, thus failing to meet the design requirements. On the contrary, for metal dampers with small yield displacement, under the action of strong earthquakes, the load and plastic deformation they bear will increase, which may cause excessive accumulation of plastic damage to the damper, or even destruction. This will lead to a decrease in the energy dissipation capacity of the damper, and it will not be able to meet the requirements of long-term reliable operation. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide an anti-buckling multi-stage energy dissipation metal damper to solve the problem that the existing metal damper cannot take into account the energy dissipation requirements under different vibration conditions.

[0006] The utility model adopts the following scheme: the application provides an anti-buckling multi-stage energy-absorbing metal damper, an upper connecting plate, a lower connecting plate, and a shear energy-absorbing plate arranged between the upper connecting plate and the lower connecting plate; triangular energy-absorbing plates perpendicular to the shear energy-absorbing plate are arranged opposite to each other on both sides of the shear energy-absorbing plate, the bottom end of the triangular energy-absorbing plate is connected to the lower connecting plate, and a gap is formed between the upper end and the upper connecting plate; a plurality of top plates are connected to the bottom surface of the upper connecting plate, and the top plates are symmetrically distributed on both sides of the upper end of the triangular energy-absorbing plate, so as to contact the triangular energy-absorbing plate when the shear energy-absorbing plate is bent to a corresponding degree under force, and the triangular energy-absorbing plate is subjected to force.

[0007] Furthermore, the shear energy dissipation plate is symmetrically provided with constraint plates on both sides of the deformation direction thereof, the upper end of the constraint plate is connected to the upper connecting plate, and the lower end is spaced apart from the lower connecting plate.

[0008] Furthermore, a fixing plate is provided on a side of the constraint plate away from the shear energy dissipation plate to provide support for the constraint plate.

[0009] Furthermore, the bottom of the fixing plate is arranged on the lower connecting plate, and a gap is formed between the upper end and the upper connecting plate.

[0010] Furthermore, the triangular energy dissipation plate includes a triangular main body and a square block formed on the top of the triangular main body, the square block is located between two adjacent top panels, and a gap is formed between the top end of the square block and the upper connecting plate.

[0011] Furthermore, a plurality of triangular energy-absorbing plates are provided.

[0012] Furthermore, the shear energy dissipation plate and the triangular energy dissipation plate are made of Q235B steel.

[0013] Furthermore, the upper connecting plate, the lower connecting plate, the top plate, the fixing plate and the restraining plate are made of Q355B steel.

[0014] Beneficial effects:

[0015] 1. The present invention adopts shear energy dissipation plates (shear plates) and triangular energy dissipation plates (bending plates) as core energy dissipation plates. The introduction of shear energy dissipation plates greatly improves the initial stiffness and yield force of the damper. At the same time, the triangular energy dissipation plates have good plastic deformation capacity and stable hysteresis performance, further enhancing the performance of the damper.

[0016] 2. The present invention adopts anti-buckling measures for the shear energy dissipation plate. The use of fixed plates and constraint plates can not only prevent the shear energy dissipation plate from producing excessive out-of-plane buckling in moderate or severe earthquakes, resulting in a decrease in energy dissipation effect, but also avoid the influence of stress generated by welding on the shear energy dissipation plate.

[0017] 3. The present invention is suitable for earthquake-resistant design of multiple earthquakes. It includes multiple failure stages, provides multiple shock-absorbing defense lines for building structures, and can meet the fortification requirements of low-intensity earthquakes and strong earthquakes at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of installing an anti-buckling multi-stage energy dissipation metal damper on a frame structure according to an embodiment of the utility model;

[0019] Figure 2 It is a structural schematic diagram of an anti-buckling multi-stage energy dissipation metal damper according to an embodiment of the utility model;

[0020] Figure 3 It is a schematic diagram of the exploded structure of an anti-buckling multi-stage energy dissipation metal damper according to an embodiment of the utility model;

[0021] Figure 4 It is a schematic diagram of a triangular energy dissipation frame of an anti-buckling multi-stage energy dissipation metal damper according to an embodiment of the utility model;

[0022] Reference numerals: frame 1 , metal damper 2 , upper connecting plate 21 , lower connecting plate 22 , shear energy dissipation plate 23 , triangular energy dissipation plate 24 , top plate 25 , fixing plate 26 , restraining plate 27 . DETAILED DESCRIPTION

[0023] Combination Figures 1 to 4 As shown, this embodiment provides an anti-buckling multi-stage energy-absorbing metal damper, including an upper connecting plate 21, a lower connecting plate 22, and a shear energy-absorbing plate 23 arranged between the upper connecting plate 21 and the lower connecting plate 22; triangular energy-absorbing plates 24 perpendicular to the shear energy-absorbing plate 23 are arranged opposite to each other on both sides, the bottom end of the triangular energy-absorbing plate 24 is connected to the lower connecting plate 22, and a gap is formed between the upper end and the upper connecting plate 21; a plurality of top plates 25 are connected to the bottom surface of the upper connecting plate 21, and the top plates 25 are symmetrically distributed on both sides of the upper end of the triangular energy-absorbing plate 24, so as to contact the triangular energy-absorbing plate 24 when the shear energy-absorbing plate 23 is bent to a corresponding degree under force, and the triangular energy-absorbing plate 24 is subjected to force.

[0024] Combination Figure 1 and Figure 2As shown, in this embodiment, the upper connecting plate 21 and the lower connecting plate 22 can be made of Q355B steel, which can be connected to the reinforced concrete mounting frame 1, and each mounting frame 1 can be provided with a plurality of the anti-buckling multi-stage energy-absorbing metal dampers 2, and the plurality of the anti-buckling multi-stage energy-absorbing metal dampers 2 can be arranged in the same straight line. The upper connecting plate 21 and the lower connecting plate 22 can be fixedly connected by welding or by connecting with a fastener. A plurality of top plates 25 suitable for matching with the triangular energy-absorbing plate 24 are provided on the bottom surface of the upper connecting plate 21. The upper end of the top plate 25 is welded to the upper connecting plate 21, and the lower end does not contact the lower connecting plate 22, and is symmetrically arranged on both sides of the triangular energy-absorbing plate 24.

[0025] The shear energy dissipation plate 23 can be made of Q235B steel and is vertically arranged in the middle of the upper connecting plate 21 and the lower connecting plate 22 to absorb earthquake energy and achieve yielding function. The shear energy dissipation plate 23 can be fixed between the upper connecting plate 21 and the lower connecting plate 22 by welding.

[0026] Combination Figures 2 to 4 As shown, the triangular energy dissipation plate 24 is distributed on both sides of the shear energy dissipation plate 23, specifically on both sides of the narrow surface of the shear energy dissipation plate 23, and can also be made of Q235B steel. The triangular energy dissipation plate 24 can be provided with one, two or more, and can be provided as required. The triangular energy dissipation plate 24 includes a triangular body in the shape of an isosceles triangle and a square block formed on the top of the triangular body, the square block is located between two adjacent top plates 25, and a gap is formed between the top of the square block and the upper connecting plate 21. The bottom edge of the lower end of the triangular energy dissipation plate 24 can be welded to the lower connecting plate 22, the upper end is spaced from the upper connecting plate 21, and the triangular energy dissipation plate 24 is arranged vertically relative to the shear energy dissipation plate 23, and is distributed on the left and right sides of the shear energy dissipation plate 23. According to the judgment of the performance level of the energy dissipation and shock absorption structure and the macro judgment of the seismic performance target of the energy dissipation and shock absorption structure, the distance between the triangular energy dissipation plate 24 and the top plate 25 is adjusted for different building types and performance targets. Taking the reinforced concrete frame 1 with a floor height of 3.3m as an example, with performance 3 as the target, the deformation reference value of the energy dissipation and shock absorption structure under multiple earthquakes is 1 / 600, and it is recommended that the distance between the triangular energy dissipation plate 24 and the top plate 25 be 5-8mm, to ensure that the triangular energy dissipation plate 24 does not contact the top plate 25 under small earthquakes, or is only in an elastic deformation state. When encountering a large earthquake or when the shear energy dissipation plate 23 is greatly deformed, the top plate 25 is made to contact the triangular energy dissipation plate 24 and transmit the seismic force, so that it enters the plastic state from the elastic state and dissipates the seismic energy.

[0027] In one embodiment, the shear energy dissipation plate 23 is symmetrically provided with constraint plates 27 on both sides of the deformation direction thereof, the upper end of the constraint plate 27 is connected to the upper connecting plate 21, and the lower end is spaced apart from the lower connecting plate 22. Specifically, the upper end is welded and fixed to the upper connecting plate 21, and the lower end does not contact the lower connecting plate 22. A fixing plate 26 is provided on the side of the constraint plate 27 away from the shear energy dissipation plate to provide support for the constraint plate 27, and the bottom of the fixing plate 26 is provided on the lower connecting plate 22, and a gap is formed between the upper end and the upper connecting plate 21. The use of the fixing plate 26 and the constraint plate 27 can not only prevent the shear energy dissipation plate from generating excessive out-of-plane buckling in the case of a moderate or large earthquake, resulting in a decrease in the energy dissipation effect, but also avoid the stress generated by welding from affecting the shear energy dissipation plate 23. Here, the distance between the constraint plate 27 and the fixing plate 26 relative to the shear energy dissipation plate 23 can be adjusted, so that the bending amplitude of the shear energy dissipation plate 23 can be adjusted as needed to quickly adapt to different earthquake resistance requirements.

[0028] In this embodiment, the top plate 25, the fixing plate 26 and the restraining plate 27 can be made of Q355B steel.

[0029] During operation, when only a small earthquake occurs, the shear energy absorbing plate 23 is used as the first-stage energy absorbing plate, which is vertically arranged between the upper and lower connecting plates 22, and begins to absorb seismic energy and realize the yield function. At this time, the triangular energy absorbing plate 24 is not in contact with the top plate 25, and neither provides rigidity nor dissipates seismic energy. When a moderate or large earthquake occurs, the shear energy absorbing plate 23 undergoes out-of-plane buckling and contacts the constraint plates 27 on both sides. The fixed plate 26 provides support for the constraint plates 27, thereby preventing the shear energy absorbing plate 23 from continuing to produce out-of-plane deformation; the triangular energy absorbing plate 24 begins to contact the top plate 25, and the seismic action is transmitted to the triangular energy absorbing plate 24 through the top plate 25, causing it to enter a plastic state from an elastic state, dissipating seismic energy, and the entire damper completes the yield energy dissipation process.

[0030] This embodiment greatly improves the initial stiffness and yield force of the damper by introducing the shear energy dissipation plate 23. At the same time, the triangular energy dissipation plate 24 has good plastic deformation capacity and stable hysteresis performance, which further enhances the performance of the damper. In addition, anti-buckling measures are taken for the shear energy dissipation plate 23. The use of the fixing plate 26 and the constraint plate 27 can not only prevent the shear energy dissipation plate 23 from producing excessive out-of-plane buckling in the case of a moderate or large earthquake, resulting in a decrease in the energy dissipation effect, but also avoid the stress generated by welding from affecting the shear energy dissipation plate 23. This scheme includes multiple failure stages, provides multiple shock-absorbing defense lines for the building structure, and can meet the defense requirements of low-intensity earthquakes and strong earthquakes at the same time. In addition, this scheme is simple in structure, easy to manufacture, convenient to install, and can be replaced very quickly after the earthquake, and has high convenience. The present invention is not only suitable for shock absorption of new buildings, but can also be used to reinforce and transform existing buildings. It can be adjusted according to different seismic fortification targets. Not only can the thickness of the energy-absorbing plate be changed, but also the gap distance between the triangular plate and the top plate 25 can be adjusted within a certain range to achieve a more convenient shock-absorbing design. It can be optimized and adjusted according to specific needs to meet the requirements of different seismic fortification targets.

[0031] It should be understood that the above are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0032] The above description of the drawings used in the implementation manner only shows certain embodiments of the utility model and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

Claims

1. An anti-buckling multi-stage energy dissipation metal damper, upper connecting plate, lower connecting plate, characterized in that: It also includes a shear energy-absorbing plate arranged between the upper connecting plate and the lower connecting plate; triangular energy-absorbing plates perpendicular to the shear energy-absorbing plate are arranged opposite to each other on both sides of the shear energy-absorbing plate, the bottom end of the triangular energy-absorbing plate is connected to the lower connecting plate, and a gap is formed between the upper end and the upper connecting plate; a plurality of top plates are connected to the bottom surface of the upper connecting plate, and the top plates are symmetrically distributed on both sides of the upper end of the triangular energy-absorbing plate, so as to contact the triangular energy-absorbing plate when the shear energy-absorbing plate is bent to a corresponding degree under force, and the triangular energy-absorbing plate is subjected to force; constraint plates are symmetrically arranged on both sides of the shear energy-absorbing plate in the deformation direction thereof, the upper end of the constraint plate is connected to the upper connecting plate, and the lower end thereof is spaced apart from the lower connecting plate.

2. The buckling-resistance multi-stage energy dissipation metal damper according to claim 1, characterized in that: A fixing plate is arranged on one side of the constraint plate away from the shear energy dissipation plate to provide support for the constraint plate.

3. The buckling-resistance multi-stage energy dissipation metal damper according to claim 2, characterized in that: The bottom of the fixing plate is arranged on the lower connecting plate, and a distance is formed between the upper end of the fixing plate and the upper connecting plate.

4. The buckling-resistance multi-stage energy dissipation metal damper according to claim 1, characterized in that: The triangular energy dissipation plate comprises a triangular main body and a square block formed on the top of the triangular main body. The square block is located between two adjacent top panels, and a gap is formed between the top end of the square block and the upper connecting plate.

5. The buckling-resistance multi-stage energy dissipation metal damper according to claim 1, characterized in that: A plurality of triangular energy-consuming plates are provided.

6. The buckling-resistance multi-stage energy dissipation metal damper according to claim 1, characterized in that: The shear energy dissipation plate and the triangular energy dissipation plate are made of Q235B steel.

7. The buckling-resistance multi-stage energy dissipation metal damper according to claim 2, characterized in that: The upper connecting plate, lower connecting plate, top plate, fixing plate and restraining plate are made of Q355B steel.

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