Double-step viscous damping wall
By designing the cavity structure and sliding plate characteristics of the double-stage viscous damping wall, precise control of the damping switching threshold and improvement of energy dissipation capacity are achieved, solving the problem of low energy dissipation efficiency of viscous damping walls in the existing technology, adapting to seismic loads of different intensities, and ensuring effective protection of the structure under minor and major earthquake conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-14
- Publication Date
- 2026-04-21
AI Technical Summary
Existing viscous damping walls have low energy dissipation capacity per unit displacement, and the damping switching threshold of some two-stage structures is fixed, making it difficult to adapt to seismic loads of different intensities.
Design a two-stage viscous damping wall, including a first chamber, a second chamber, and a third chamber within a shell, in which a sliding plate slides to achieve flexibility and efficient energy dissipation. By opening pressure balance holes and setting flow guide tips on the sliding plate, a dual mode of shear energy dissipation and flow energy dissipation is formed.
It achieves precise control of the damping switching threshold, adapts to seismic loads of different intensities, improves the energy dissipation capacity per unit displacement, ensures flexible energy dissipation under small earthquake conditions and efficient energy dissipation under large earthquake conditions, and avoids local stress concentration and heat accumulation in the damping medium.
Smart Images
Figure CN121897202A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of seismic resistance and vibration reduction technology in buildings, and in particular to a two-stage viscous damping wall. Background Technology
[0002] Viscous damping walls, as a highly efficient passive damping device, dissipate the energy generated by external loads such as earthquakes through the shear deformation and flow of the damping medium, thereby reducing the seismic response of building structures and protecting the structure and the safety of personnel and equipment inside. Existing viscous damping walls mostly achieve a two-stage damping effect by controlling the facing area of the sliding plate and the shell or the internal spacing. However, some structures suffer from problems such as inaccurate damping switching, limited energy dissipation efficiency, and poor structural adaptability. For example, traditional single-chamber structures rely solely on the shear energy dissipation of the damping medium, resulting in low energy dissipation capacity per unit displacement; some two-stage structures have fixed damping switching thresholds, making it difficult to adapt to seismic loads of varying intensities. Summary of the Invention
[0003] This application provides a two-stage viscous damping wall to solve the problems of low energy dissipation per unit displacement of existing viscous damping walls, fixed damping switching thresholds in some two-stage structures, and difficulty in adapting to seismic loads of different intensities.
[0004] This application provides a two-stage viscous damping wall, comprising: The shell contains a first chamber, two second chambers, and two third chambers. The two second chambers are symmetrically distributed at opposite ends of the first chamber and communicate with it. One of the third chambers is located at the end of one of the second chambers away from the first chamber and communicates with the corresponding second chamber. The other third chamber is located at the end of the other second chamber away from the first chamber and communicates with the corresponding second chamber. The damping medium is filled in the first chamber, the second chamber, and the third chamber; A sliding plate is disposed inside the housing. The sliding plate slides in the first, second, and third chambers along the length of the housing to shear the damping medium and achieve flexible energy dissipation.
[0005] In one possible design, the length of the sliding plate is greater than the length of the first chamber and less than the total length of the first chamber and the two second chambers. During the sliding process, when the end face of the sliding plate is inside the second chamber, the sliding plate is in the first-order position; when the end face of the sliding plate enters the third chamber, the sliding plate is in the second-order position.
[0006] In one possible design, the thickness of the third chamber is less than the thickness of the second chamber.
[0007] In one possible design, the thickness of the third chamber is equal to the thickness of the first chamber.
[0008] In one possible design, pressure balancing holes are provided on the sliding plate.
[0009] In one possible design, the end face of the sliding plate has a guide tip, which is a triangular prism structure. The angle between one side of the guide tip and the end face of the sliding plate is α, and the angle between the other side of the guide tip and the end face of the sliding plate is β, where α < β.
[0010] In one possible design, pressure balancing holes are symmetrically positioned near the end face of the sliding plate, and the distance between the outer edge of the pressure balancing holes and the end face of the sliding plate is less than the width of the third chamber.
[0011] In one possible design, the housing includes: The first wall panel includes two oppositely arranged first wall panels, with a first chamber formed between the two first wall panels; The second wall panel consists of two sets, which are respectively set at both ends of the first wall panel. Each set includes two oppositely arranged second wall panels, and a second chamber is formed between the two second wall panels. The third wall panel consists of two sets, each set at the end of the second wall panel away from the first wall panel. Each set includes two oppositely arranged third wall panels, forming a third chamber between the two third wall panels. The end plate is vertically installed at the end of the third wall panel that is furthest from the second wall panel.
[0012] In one possible design, the second wall panel is located outside the first and second wall panels, with one end sealed to the first wall panel and the other end sealed to the second wall panel.
[0013] In one possible design, the damping medium is a methyl silicone oil-modified damping fluid, a mineral oil-based damping fluid, or a synthetic ester-based damping fluid.
[0014] The beneficial effects of this application are as follows: The double-stage viscous damping wall of this application, through a first chamber, a second chamber, and a third chamber, matches the length and thickness of the chambers with the length and thickness of the sliding plate. This allows for precise switching of the sliding plate's end between a first-stage position (second chamber) and a second-stage position (third chamber). The damping switching threshold is stable, adaptable to seismic loads of varying intensities, ensuring flexible energy dissipation under minor earthquake conditions and efficient energy dissipation under major earthquake conditions. The symmetrical layout of the first, second, and third chambers ensures uniform stress distribution on the sliding plate, avoiding localized stress concentration.
[0015] By creating pressure balancing holes in the sliding plate, on the one hand, the pressure balancing holes break the flow barrier of the damping medium on both sides of the sliding plate, balancing the pressure difference on both sides of the sliding plate, reducing the drag resistance of the damping medium on the side with higher pressure, and uniformly dispersing the damping medium on the sliding plate; on the other hand, the damping medium generates additional flow resistance when passing through the holes, which, combined with the shear resistance between the sliding plate and the shell, further improves the energy dissipation capacity per unit displacement; furthermore, the pressure balancing holes form circulation channels for the damping fluid, which can promote the convection exchange between cold and hot damping media, accelerate heat dissipation, and prevent the local heat accumulation of the damping medium from causing a decrease in its viscosity and affecting the damping performance.
[0016] By setting a flow guide tip on the end face of the sliding plate, the flow guide tip and the pressure balance hole work together to form a dual energy dissipation mode of shear energy dissipation and flow energy dissipation at the second-order position. Compared with the traditional single shear energy dissipation structure, the energy dissipation capacity per unit displacement is greatly improved, which can quickly dissipate seismic energy and reduce the seismic response of the structure. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 A schematic diagram of the structure of the double-stage viscous damping wall in the middle position, provided in an embodiment of this application; Figure 2 A schematic diagram of a two-order viscous damping wall in the first-order position, provided in an embodiment of this application; Figure 3 A schematic diagram of the structure of the second-order viscous damping wall provided in the embodiments of this application, in the second-order position. Figure 1 ; Figure 4 A schematic diagram of the structure of the second-order viscous damping wall provided in the embodiments of this application, in the second-order position. Figure 2 ; Figure 5 A schematic diagram of the flow guide tip of the double-stage viscous damping wall provided in an embodiment of this application; Figure 6 This is a front view of a two-stage viscous damped wall provided in an embodiment of this application; Figure 7 for Figure 6 Sectional view along the middle AA; Figure 8 A schematic diagram of the sliding plate of the double-stage viscous damping wall provided in an embodiment of this application; Figure 9 This is a schematic diagram of the shell structure of the double-stage viscous damping wall provided in the embodiments of this application.
[0019] Figure label: 100, Shell; 110, First wall plate; 111, First chamber; 120, Second wall plate; 121, Second chamber; 130, Third wall plate; 131, Third chamber; 140, End plate; 200, Sliding plate; 210, Pressure balance hole; 300, Guide tip. Detailed Implementation
[0020] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0021] The following is combined with Figures 1-9 This describes the two-stage viscous damping wall provided in the embodiments of this application.
[0022] Reference Figures 1-9 The two-stage viscous damping wall provided in this application embodiment includes a shell 100, a damping medium, and a sliding plate 200.
[0023] Reference Figure 1 As shown, the shell 100 contains a first chamber 111, two second chambers 121, and two third chambers 131, arranged sequentially along the length of the shell 100 to form a continuous cavity structure. A sliding plate 200 is disposed within the shell 100 and can reciprocate within the first chamber 111, second chamber 121, and third chamber 131 along the length of the shell 100, achieving flexible energy dissipation through a shear-damping medium. The damping medium fills the first chamber 111, second chamber 121, and third chamber 131, and is used to generate damping force through deformation and flow caused by the shearing action of the sliding plate 200.
[0024] The two second chambers 121 are symmetrically distributed at opposite ends of the first chamber 111 and are connected to the first chamber 111, forming an intermediate channel for the flow of the damping medium and the movement of the sliding plate 200. The two third chambers 131 are located at the ends of the two second chambers 121 away from the first chamber 111 and are connected to the corresponding second chambers 121, forming a damping-enhanced energy dissipation region.
[0025] Specifically, the length of the sliding plate 200 is greater than the length of the first chamber 111, but less than the total length of the first chamber 111 and the two second chambers 121. This ensures that the sliding plate 200 can switch between two positions when sliding between different chambers, specifically: Reference Figure 2 As shown, when the end face of the sliding plate 200 is located in the second chamber 121, the sliding plate 200 is in the first-order position.
[0026] Reference Figure 3 , Figure 4 As shown, when the end face of the sliding plate 200 enters the third chamber 131, the sliding plate 200 is in the second-order position.
[0027] In some specific embodiments, the thickness of the third chamber 131 is less than the thickness of the second chamber 121, and the thickness of the third chamber 131 is equal to the thickness of the first chamber 111. This difference in chamber thickness provides a structural basis for the realization of two-order damping.
[0028] Specifically, the housing 100 includes a first wall panel 110, a second wall panel 120, a third wall panel 130, and an end plate 140. The first wall panel 110 comprises two oppositely arranged, parallel to each other, forming a first chamber 111 between them, which is the initial movement area of the sliding plate 200. The second wall panels 120 are in two sets, respectively disposed at both ends of the first wall panels 110. Each set includes two oppositely arranged second wall panels 120, forming a second chamber 121 between them. The distance between the two second wall panels 120 is greater than that between the first chambers 111, ensuring that the sliding plate 200 slides within the second chambers 121 with low damping. Two sets of third wall panels 130 are respectively disposed at the end of the second wall panel 120 away from the first wall panel 110. Each set includes two oppositely disposed third wall panels 130, forming a third chamber 131 between the two third wall panels 130. The distance between the two third wall panels 130 is equal to that of the first chamber 111, ensuring that the sliding plate 200 slides in the third chamber 131 to form a high damping effect. An end plate 140 is vertically disposed at the end of the third wall panel 130 away from the second wall panel 120, used to seal the end of the third chamber 131 to prevent leakage of the damping medium.
[0029] Preferably, the second wall panel 120 is located outside the first wall panel 110 and the third wall panel 130, with one end sealed to the first wall panel 110 and the other end sealed to the third wall panel 130, to ensure the sealing of the entire housing 100 and prevent the damping medium from leaking at the cavity connection.
[0030] Preferably, the damping medium filling volume is 90%-95% of the total chamber volume, and the damping medium is selected from one of the following: methyl silicone oil modified damping fluid, mineral oil-based damping fluid, or synthetic ester damping fluid. Methyl silicone oil modified damping fluid has good chemical stability and controllable flowability, and is suitable for damping performance requirements under dynamic working conditions; mineral oil-based damping fluid has a lower cost and is suitable for conventional building seismic scenarios; synthetic ester damping fluid has a wide range of high and low temperature resistance and good flame retardancy, and can be adapted to extreme environmental scenarios such as open-air bridges.
[0031] Reference Figures 1-6 , Figure 8 As shown, in some specific embodiments, a pressure balancing hole 210 is provided on the sliding plate 200. By providing the pressure balancing hole 210 on the sliding plate 200, on the one hand, the pressure balancing hole 210 breaks the flow obstruction of the damping medium on both sides of the sliding plate 200, which can balance the pressure difference on both sides of the sliding plate 200, reduce the drag resistance of the damping medium on the sliding plate 200 on the side with higher pressure, and uniformly reduce the disturbance of the damping medium on the sliding plate 200; on the other hand, the damping medium will generate additional flow resistance when passing through the hole, which will be superimposed with the shear resistance between the sliding plate 200 and the shell, further improving the energy dissipation capacity per unit displacement; furthermore, the pressure balancing hole 210 forms a circulation channel for the damping fluid, which can promote the convection exchange of cold and hot damping media, accelerate heat dissipation, and avoid the local heat accumulation of the damping medium, which will cause its viscosity to decrease and affect the damping performance.
[0032] In some specific embodiments, pressure balancing holes 210 are symmetrically formed near the end face of the sliding plate 200. The distance between the outer edge of the pressure balancing hole 210 and the end face of the sliding plate 200 is less than the width of the third chamber 131. Since the distance between the outer edge of the pressure balancing hole 210 and the end face of the sliding plate 200 is less than the width of the third chamber 131, when the end face of the sliding plate 200 enters the third chamber 131 and continues to slide in the third chamber 131, the pressure balancing hole 210 gradually enters the third chamber 131. Under the action of the pressure difference, the damping medium in the third chamber 131 circulates rapidly on both sides of the sliding plate 200 through the pressure balancing hole 210, thus forming a dual energy dissipation of shear energy and flow energy in a timely manner.
[0033] In some specific embodiments, the end face of the sliding plate 200 has a guide tip 300, which is a triangular prism structure. The angle formed between one side of the guide tip 300 and the end face of the sliding plate 200 is α, and the angle formed between the other side of the guide tip 300 and the end face of the sliding plate 200 is β, and α < β. Since α < β, the guide tip 300 is positioned to one side of the centerline of the sliding plate 200. Thus, when the sliding plate 200 slides in the first chamber 111, the second chamber 121, and the third chamber 131 to shear the damping medium, the guide tip 300 acts as a diversion point, with more damping medium flowing to one side of the guide tip 300 than to the other side. Consequently, the pressure on one side of the sliding plate 200 is higher than that on the other side, creating a pressure difference. Under the influence of this pressure difference, the damping medium circulates rapidly on both sides of the sliding plate 200 through the pressure balance hole 210, further promoting the superposition of shear energy consumption and flow energy consumption.
[0034] The working principle of the two-order viscous damping wall in this application: The double-order viscous damping wall of this application achieves a double-order damping effect through the sliding of the sliding plate 200 between different chambers and the differentiated design of the chamber thickness and the structure of the sliding plate 200. The specific working process is as follows: First-order position (minor earthquake / common working conditions): When subjected to minor external loads such as small earthquakes, the building structure experiences slight relative motion, causing the sliding plate 200 to slide along the length of the shell 100. At this time, the end face of the sliding plate 200 is located only within the second chamber 121, and the sliding plate 200 is in a first-order position. Because the thickness of the second chamber 121 is greater than that of the third chamber 131, the distance between the sliding plate 200 and the chamber wall is larger, resulting in a larger shear width of the damping medium. According to the principle of viscous damping, the larger the shear width, the smaller the shear rate, and the smaller the shear resistance generated by the damping medium. Therefore, the damping coefficient is in a low-order state. During this process, although the guide tip 300 of the sliding plate 200 generates a certain diversion effect, the thickness of the second chamber 121 is large, and the pressure difference is not significant. Flexible energy dissipation is mainly achieved through the shear deformation of the damping medium, which can avoid rigid damage to the structure due to excessive damping force and ensure the normal use function of the structure.
[0035] Second-order location (major earthquake / rare geological conditions): When subjected to large external loads such as a major earthquake, the relative displacement of the building structure increases, causing the sliding plate 200 to continue sliding until its end face enters the third chamber 131, at which point the sliding plate 200 switches to the second-order position. Since the thickness of the third chamber 131 is less than that of the second chamber 121, the distance between the sliding plate 200 and the chamber wall decreases, reducing the shear width of the damping medium, increasing the shear rate, and significantly enhancing the shear resistance. Simultaneously, because the distance from the outer edge of the pressure balance hole 210 to the end face of the sliding plate 200 is less than the width of the third chamber 131, the pressure balance hole 210 gradually enters the third chamber 131. Under the pressure difference formed at the guide tip 300, the damping medium in the third chamber 131 and the second chamber 121 circulates rapidly on both sides of the sliding plate 200 through the pressure balance hole 210, resulting in dual energy dissipation through shear and flow. The combined effect of the two forces causes the damping coefficient to jump to a higher order, which can quickly dissipate a large amount of seismic energy, limit the maximum displacement of the structure, and prevent the structure from collapsing.
[0036] After the seismic load disappears, the sliding plate 200 slides in the opposite direction under the action of the structural restoring force, gradually retreating from the third-order chamber to the second chamber 121 and the first chamber 111, restoring to the initial intermediate state, ensuring that the two-order damping energy dissipation function can be repeatedly realized during the next earthquake.
[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0040] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0041] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A two-stage viscous damping wall, characterized in that, include: The housing comprises a first chamber, two second chambers, and two third chambers. The two second chambers are symmetrically distributed at opposite ends of the first chamber and communicate with the first chamber. One of the third chambers is located at the end of one of the second chambers away from the first chamber and communicates with the corresponding second chamber. The other third chamber is located at the end of the other second chamber away from the first chamber and communicates with the corresponding second chamber. A damping medium is filled in the first chamber, the second chamber, and the third chamber; A sliding plate is disposed within the housing. The sliding plate achieves flexible energy dissipation by sliding along the length of the housing in the first chamber, the second chamber, and the third chamber to shear the damping medium.
2. The two-stage viscous damping wall according to claim 1, characterized in that, The length of the sliding plate is greater than the length of the first chamber and less than the total length of the first chamber and the two second chambers. During the sliding process, when the end face of the sliding plate is inside the second chamber, the sliding plate is in a first-order position; when the end face of the sliding plate enters the third chamber, the sliding plate is in a second-order position.
3. The two-stage viscous damping wall according to claim 2, characterized in that, The thickness of the third chamber is less than the thickness of the second chamber.
4. The two-stage viscous damping wall according to claim 3, characterized in that, The thickness of the third chamber is equal to the thickness of the first chamber.
5. The two-stage viscous damping wall according to any one of claims 1-4, characterized in that, The sliding plate has pressure balancing holes.
6. The two-stage viscous damping wall according to claim 5, characterized in that, The end face of the sliding plate has a guide tip, which is a triangular prism structure. The angle between one side of the guide tip and the end face of the sliding plate is α, and the angle between the other side of the guide tip and the end face of the sliding plate is β, where α < β.
7. The two-stage viscous damping wall according to claim 5, characterized in that, The pressure balancing holes are symmetrically located near the end face of the sliding plate, and the distance between the outer edge of the pressure balancing holes and the end face of the sliding plate is less than the width of the third chamber.
8. The two-stage viscous damping wall according to claim 1, characterized in that, The housing includes: The first wall panel includes two oppositely arranged first wall panels, with the first cavity formed between the two first wall panels; The second wall panel consists of two sets, which are respectively disposed at both ends of the first wall panel. Each set includes two oppositely disposed second wall panels, and the second chamber is formed between the two second wall panels. The third wall panel consists of two sets, each set at the end of the second wall panel away from the first wall panel. Each set includes two oppositely arranged third wall panels, and the third chamber is formed between the two third wall panels. An end plate is vertically disposed at the end of the third wall panel away from the second wall panel.
9. The two-stage viscous damping wall according to claim 8, characterized in that, The second wall panel is located outside the first wall panel and the second wall panel, with one end sealed to the first wall panel and the other end sealed to the second wall panel.
10. The two-stage viscous damping wall according to claim 1, characterized in that, The damping medium is a methyl silicone oil modified damping liquid, a mineral oil-based damping liquid, or a synthetic ester damping liquid.