Double-step combined metal damper
By designing a two-stage combined metal damper, using a combination of hyperbolic plates and V-shaped trigger plates, graded energy dissipation under different intensity loads was achieved, solving the adaptability and efficiency problems of traditional dampers under multi-level seismic action, and improving the vibration reduction performance and safety of the structure.
Patent Information
- Application Number
- CN202423044948.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Traditional single-stage metal dampers have a single energy dissipation mechanism, making them difficult to adapt to multi-level earthquakes. They have a fixed starting force threshold, lack the ability to optimize response for different earthquake magnitudes, and their energy dissipation efficiency is limited under small earthquakes.
A two-stage combined metal damper was designed, which adopts a combination of hyperbolic plate and V-shaped trigger plate. It achieves graded energy consumption through a progressive activation mechanism, optimizes the stress mode of the component, and improves the material utilization efficiency.
It significantly improves the overall damping performance of the structural system under complex dynamic loads, provides comprehensive and reliable protection, avoids the problem of sudden failure of traditional dampers under large displacements, and improves safety and energy efficiency.
Smart Images
Figure CN223497380U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building energy dissipation technology, specifically to a two-stage combined metal damper. Background Technology
[0002] In recent years, with the rapid development of high-rise buildings and long-span structures, structural seismic resistance and damping technology has received widespread attention. Among numerous damping technologies, metal dampers based on mild steel materials have become a research hotspot in the field of structural damping due to their excellent energy dissipation performance, reliable working mechanism, and good economic efficiency. Mild steel, through its unique material mechanical properties (such as low yield strength, high ductility, and stable hysteresis performance) and innovative structural design, exhibits a significant energy dissipation mechanism under dynamic loads. Its energy dissipation performance is mainly reflected in the following aspects:
[0003] 1) Constitutive relation of materials: Mild steel exhibits stable hysteretic characteristics and excellent low-cycle fatigue performance under cyclic loading;
[0004] 2) Component geometry: By optimizing the cross-sectional shape and structural details, the plastic deformation capacity and energy dissipation efficiency of the component can be significantly improved;
[0005] 3) System integration application: Reasonable layout and connection structure can achieve synergistic improvement of the overall structural performance.
[0006] Under dynamic excitation such as earthquakes or wind-induced vibrations, mild steel can effectively convert input energy into inelastic deformation energy, thereby improving the damping toughness and safety performance of the structural system.
[0007] Currently, traditional single-stage metal energy dissipation devices have the following technical limitations:
[0008] 1) Its energy dissipation mechanism is singular and difficult to adapt to multi-level seismic action;
[0009] 2) The starting force threshold is fixed, lacking the ability to optimize response for different earthquake magnitudes;
[0010] 3) Its energy consumption efficiency is limited, making it difficult to fully exert its damping effect under small earthquakes. Utility Model Content
[0011] The purpose of this invention is to address existing technical problems by providing a two-stage combined metal damper. Through an innovative two-stage energy dissipation mechanism, it achieves the following technological breakthroughs: 1) It possesses graded energy dissipation capabilities, enabling it to exert corresponding damping effects under loads of varying intensities; 2) It employs a progressive activation mechanism to ensure a smooth transition in the energy dissipation process; 3) It optimizes the stress patterns of components and improves material utilization efficiency. This two-stage energy dissipation characteristic can significantly enhance the overall damping performance of structural systems under complex dynamic loads, providing more comprehensive and reliable protection for engineering structures.
[0012] The technical solution of this utility model is as follows:
[0013] A two-stage composite metal damper includes an upper connecting plate and a lower connecting plate. At least five composite components are vertically arranged between the upper and lower connecting plates. Each composite component includes a hyperbolic plate and two V-shaped trigger plates. The first and second V-shaped trigger plates are symmetrically arranged on both sides of the hyperbolic plate. There is a progressive activation zone between adjacent composite components, that is, there is a progressive activation zone between adjacent first and second V-shaped trigger plates. The length of the progressive activation zone is 0.01-0.03 times the height of the V-shaped trigger plate.
[0014] Furthermore, the width of the V-shaped trigger plate is equal to the width of the thinnest part of the web in the middle of the hyperbolic plate.
[0015] Furthermore, the V-shaped trigger plate is fixedly connected to the hyperbolic plate by a welding process.
[0016] Furthermore, the hyperbolic plate is made of LY160 mild steel material, and the yield strength of the hyperbolic plate is 160MPa.
[0017] Furthermore, the two sides of the hyperbolic plate cross-section are curved, that is, the lateral width decreases symmetrically and uniformly from the middle to both ends, and the ratio of the cross-sectional dimension at the middle to the cross-sectional dimension at both ends of the hyperbolic plate is 0.4-0.6.
[0018] Furthermore, the V-shaped trigger plate is vertically connected to the hyperbolic plate between the upper and lower connecting plates. The V-shaped trigger plate acts as a stiffening rib to provide lateral constraint and control the out-of-plane deformation of the hyperbolic plate.
[0019] Furthermore, the at least five sets of composite components are arranged in parallel at equal intervals.
[0020] Furthermore, both the upper connecting plate and the lower connecting plate are provided with bolt connection holes.
[0021] Furthermore, the tilt angle of the V-shaped trigger plate can be adjusted within a range of ±2°.
[0022] Compared with existing technologies, the beneficial effects of this utility model are:
[0023] 1. A two-stage combined metal damper, through innovative mechanical performance comparison analysis, and by comparing the hysteresis curves of the innovative two-stage energy dissipator and the traditional single-stage damper, shows that this utility model has significant advantages in mechanical performance. First, within a small displacement range (displacement ±3mm), the two-stage energy dissipator exhibits initial stiffness similar to that of the traditional damper, ensuring the normal normal operation of the structure during use. When the displacement increases to ±6mm, due to the gradual activation effect of the V-shaped trigger plate, the energy dissipation capacity of the two-stage energy dissipator is significantly improved, and its hysteresis curve envelope area is significantly larger than that of the traditional damper by about 40%, demonstrating superior energy dissipation capability.
[0024] 2. A two-stage combined metal damper, with verification of its two-stage energy dissipation mechanism. Hysteresis curve data further validates the two-stage energy dissipation mechanism of this invention: In the first stage (displacement less than 3mm), the hyperbolic plate mainly provides foundation stiffness and damping, with a maximum load-bearing capacity of approximately 24kN; in the second stage (displacement greater than 6mm), the V-shaped trigger plate is gradually activated, and when the displacement reaches 15mm, the maximum load-bearing capacity increases to 37kN, an increase of over 50%. This progressive mechanical response characteristic effectively avoids the problem of abrupt failure of traditional dampers under large displacements.
[0025] 3. A two-stage combined metal damper, with its innovative two-stage energy dissipation mechanism, not only provides excellent mechanical performance but also brings significant value to engineering practice: 1) It adapts to multi-level seismic action, maintaining moderate stiffness under minor earthquakes to provide necessary structural protection, while providing greater energy dissipation capacity through the progressive activation of the V-shaped plate under moderate and major earthquakes; 2) The progressive triggering mechanism avoids the abrupt failure problem of traditional dampers, improving the safety and reliability of the structure; 3) Excellent adaptability to large deformations provides the structure with a higher safety reserve against collapse. These characteristics give this invention significant technical and economic advantages in practical engineering applications. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of a two-stage combined metal damper.
[0027] Figure 2 This is a front view of a two-stage combined metal damper.
[0028] Figure 3 This is a left view of a two-stage combined metal damper.
[0029] Figure 4 This is a schematic diagram of the overall structure of a hyperbolic plate and V-shaped trigger plate assembly of a two-stage combined metal damper.
[0030] Figure 5 This is a top view of a two-stage combined metal damper.
[0031] Figure 6 This is a performance comparison chart of a traditional damper and a progressively activated two-stage metal damper.
[0032] Reference numerals: 1-Upper connecting plate, 12-Lower connecting plate, 13-Bolt connection hole, 2-V-shaped trigger plate, 21-Hyperbolic plate, 22-First V-shaped trigger plate, 23-Second V-shaped trigger plate, 3-Progressive activation zone. Detailed Implementation
[0033] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0034] The features and performance of this utility model will be further described in detail below with reference to the embodiments.
[0035] Please see Figure 1-6 A two-stage combined metal damper, such as Figure 1 As shown, it includes an upper connecting plate 1 and a lower connecting plate 12, and at least five composite components are vertically arranged between the upper connecting plate 1 and the lower connecting plate 12, such as... Figure 4 As shown, the composite component includes a hyperbolic plate 21 and two V-shaped trigger plates 2, with the first V-shaped trigger plate 22 and the second V-shaped trigger plate 23 symmetrically arranged on both sides of the hyperbolic plate 21; as Figure 2 As shown, there is a progressive activation zone 3 between adjacent composite components, that is, there is a progressive activation zone 3δ between adjacent first V-shaped trigger plate 22 and second V-shaped trigger plate 23, wherein the value of δ is adjustable, and the length of progressive activation zone 3δ is 0.01-0.03 to the height of V-shaped trigger plate (22).
[0036] The width of the V-shaped trigger plate 2 is equal to the width of the thinnest part of the web in the middle of the hyperbolic plate. The V-shaped trigger plate 2 forms a vertical skeleton system in the central region, which ensures both the overall stability of the structure and provides good load-bearing performance.
[0037] The V-shaped trigger plate 2 is fixedly connected to the hyperbolic plate 21 by welding. The V-shaped trigger plate 2 is designed to provide ideal constraints for the hyperbolic energy-dissipating web, ensuring that it can fully utilize its shear deformation energy dissipation capacity under seismic loading, and significantly improving the structure's vibration reduction performance.
[0038] like Figure 3 As shown, the hyperbolic plate 21 is made of LY160 mild steel and has low yield strength (σs=160MPa) and high ductility (δ>30%). This achieves uniform stress distribution and provides energy dissipation capacity for the first stage of the foundation.
[0039] The two sides of the cross-section of the hyperbolic plate 21 are curved, that is, the transverse width decreases symmetrically and uniformly from the middle to both ends to achieve optimized stress distribution. The thickness and radius of curvature of the hyperbolic plate 21 can be parametrically designed according to actual engineering requirements. The ratio of the cross-sectional dimension at the middle to the cross-sectional dimension at both ends of the hyperbolic plate 21 is 0.4-0.6.
[0040] The V-shaped trigger plate 2 and the hyperbolic plate 21 are vertically connected between the upper connecting plate 1 and the lower connecting plate 12, forming a stable energy dissipation system. The V-shaped trigger plate 2 acts as a stiffening rib to provide lateral constraints and control the out-of-plane deformation of the hyperbolic plate 21.
[0041] At least five sets of composite components are arranged in parallel at equal intervals.
[0042] like Figure 1 and Figure 5 As shown, both the upper connecting plate 1 and the lower connecting plate 12 are provided with bolt connection holes 13. The design of the edge bolt connection holes 13 not only ensures the reliability of the connection, but also facilitates later maintenance and replacement, reflecting good engineering practicality.
[0043] The tilt angle of the V-shaped trigger plate 2 can be adjusted within ±2° to achieve precise control of the triggering characteristics.
[0044] In terms of mechanical performance, the hyperbolic plate 21 achieves controllable shear deformation energy dissipation by bearing the main shear force. The V-shaped trigger plate 2 system prevents out-of-plane instability of the hyperbolic plate 21 under large deformation conditions through effective constraint, while providing excellent secondary stress performance. This cooperative working mechanism significantly improves the overall performance of the damper.
[0045] During the elastic working phase, the hyperbolic plate 21 and the V-shaped trigger plate 2 maintain an elastic state, providing additional stiffness to the structure; during the plastic working phase, energy dissipation is achieved through shear deformation and progressive activation mechanism, and it has bidirectional energy dissipation characteristics.
[0046] A precisely controlled progressive activation zone δ is set between the V-shaped trigger plates to achieve a smooth transition in the energy dissipation process. A collaborative working mechanism of hyperbolic plates and V-shaped trigger plates is employed, where the hyperbolic plates are responsible for the foundation damping function in the first stage (minor earthquakes), while the combination of the two components achieves enhanced damping effects in the second stage (moderate and major earthquakes). In terms of mechanical performance, in the elastic stage, the composite component mainly provides additional stiffness; in the plastic stage, the hyperbolic plates provide foundation energy dissipation capacity through shear deformation. When the displacement exceeds the preset value δ, the V-shaped trigger plates are gradually activated, achieving stable shear force transmission through progressive contact, ultimately reaching the optimal energy dissipation state. Experiments show that this innovative design not only provides ideal additional stiffness and damping characteristics but also significantly improves the seismic performance and safety reliability of the structure through a two-stage yielding mechanism. This invention exhibits excellent damping effects under complex dynamic loads, providing a new technical approach for the seismic design of building structures.
[0047] like Figure 6 As shown in the comparative analysis of the innovative mechanical properties, the hysteresis curves of the innovative two-stage energy dissipator and the traditional single-stage damper are compared, demonstrating that the present invention has significant advantages in mechanical performance. Firstly, within a small displacement range (displacement ±3mm), the two-stage energy dissipator exhibits initial stiffness similar to that of the traditional damper, ensuring normal operation of the structure during use. When the displacement increases to ±6mm, due to the progressive activation effect of the V-shaped trigger plate, the energy dissipation capacity of the two-stage energy dissipator is significantly improved, and its hysteresis curve envelope area is significantly larger than that of the traditional damper by approximately 40%, exhibiting superior energy dissipation capability.
[0048] The dual-stage energy dissipation mechanism of this invention was verified by hysteresis curve data: In the first stage (displacement less than 3 mm), the hyperbolic plate mainly provides foundation stiffness and damping, with a maximum bearing capacity of approximately 24 kN; in the second stage (displacement greater than 6 mm), the V-shaped trigger plate is gradually activated, and when the displacement reaches 15 mm, the maximum bearing capacity increases to 37 kN, an increase of more than 50%. This progressive mechanical response characteristic effectively avoids the problem of abrupt failure of traditional dampers under large displacements.
[0049] Quantitative evaluation of energy dissipation performance and quantitative analysis of hysteresis curves show that, under a maximum displacement of 30mm, the equivalent damping ratio of this invention can reach 0.35, which is about 45% higher than that of traditional single-stage dampers; the cumulative energy dissipation capacity is improved by more than 40%. Simultaneously, the high fullness of the hysteresis curve indicates that it has stable energy dissipation performance and good deformation recovery capability. Under repeated cyclic loading, its bearing capacity decreases by no more than 5%, demonstrating excellent low-cycle fatigue performance.
[0050] Stiffness control characteristics, as observed from the slope of the hysteresis curve, show that this invention exhibits moderate initial stiffness (approximately 8 kN / mm) in the elastic stage (displacement less than 3 mm), comparable to traditional dampers. Upon entering the plastic stage, the gradual activation by the V-shaped trigger plate ensures a smooth transition in structural stiffness, avoiding the impact effects caused by abrupt stiffness changes in traditional dampers.
[0051] Mechanical response stability, as revealed by cyclic characteristic analysis of the hysteresis curve, demonstrates excellent response stability during repeated loading. The load-bearing capacity deviation between adjacent cycles does not exceed 3%, and the hysteresis curve shape remains consistent, indicating reliable reusability of the component. This stable mechanical response characteristic provides a reliable guarantee for the long-term service of the structure.
[0052] In terms of transition performance, this invention exhibits ideal transition characteristics during the two-stage transition process. As can be seen from the hysteresis curve, within the displacement range of 6-10mm, as the V-shaped trigger plate is gradually activated, the load-bearing capacity of the component shows a smooth increasing trend, with a growth rate of approximately 2.5kN / mm, avoiding the sudden jump phenomenon commonly found in traditional dampers.
[0053] The innovative two-stage energy dissipation mechanism for engineering applications not only provides excellent mechanical performance but also brings significant value to engineering practice: 1) It adapts to multi-level seismic action, maintaining moderate stiffness under minor earthquakes to provide necessary structural protection, while providing greater energy dissipation capacity through the progressive activation of the V-shaped plate under moderate and major earthquakes; 2) The progressive triggering mechanism avoids the abrupt failure problem of traditional dampers, improving the safety and reliability of the structure; 3) Excellent adaptability to large deformations provides the structure with a higher safety reserve against collapse. These characteristics give this invention significant technical and economic advantages in practical engineering applications.
[0054] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.
Claims
1. A two-stage combined metal damper, characterized in that, The system includes an upper connecting plate (1) and a lower connecting plate (12). At least five composite components are vertically arranged between the upper connecting plate (1) and the lower connecting plate (12). The composite components include a hyperbolic plate (21) and two V-shaped trigger plates (2). The first V-shaped trigger plate (22) and the second V-shaped trigger plate (23) are symmetrically arranged on both sides of the hyperbolic plate (21). There is a progressive activation zone (3) between adjacent composite components. That is, there is a progressive activation zone (3) between adjacent first V-shaped trigger plates (22) and second V-shaped trigger plates (23). The length of the progressive activation zone (3) is 0.01-0.03 to the height of the V-shaped trigger plate (2).
2. The two-stage combined metal damper according to claim 1, characterized in that, The width of the V-shaped trigger plate (2) is equal to the width of the thinnest part of the web in the middle of the hyperbolic plate.
3. The two-stage combined metal damper according to claim 1, characterized in that, The V-shaped trigger plate (2) is fixedly connected to the hyperbolic plate (21) by welding.
4. A two-stage combined metal damper according to claim 1, characterized in that, The hyperbolic plate (21) is made of LY160 mild steel and has a yield strength of 160MPa.
5. A two-stage combined metal damper according to claim 1, characterized in that, The two sides of the cross-section of the hyperbolic plate (21) are curved, that is, the lateral width decreases symmetrically and uniformly from the middle to both ends. The ratio of the cross-sectional dimension of the middle part of the hyperbolic plate (21) to the cross-sectional dimension of both ends is 0.4-0.
6.
6. A two-stage combined metal damper according to claim 1, characterized in that, The V-shaped trigger plate (2) is vertically connected to the hyperbolic plate (21) between the upper connecting plate (1) and the lower connecting plate (12). The V-shaped trigger plate (2) acts as a stiffening rib to provide lateral constraint and control the out-of-plane deformation of the hyperbolic plate (21).
7. A two-stage combined metal damper according to claim 1, characterized in that, The at least five sets of composite components are arranged in parallel at equal intervals.
8. A two-stage combined metal damper according to claim 1, characterized in that, Both the upper connecting plate (1) and the lower connecting plate (12) are provided with bolt connection holes (13).
9. A two-stage combined metal damper according to claim 1, characterized in that, The tilt angle of the V-shaped trigger plate (2) can be adjusted within a range of ±2°.