Composite viscous damper integrated with buckling restrained energy dissipation system

Abstract

The invention relates to a composite viscous damper integrated with a buckling restrained energy dissipation system. The composite viscous damper comprises a core rod capable of deforming and buckling; the first connecting plate and the second connecting plate are fixedly arranged at the two ends of the core rod respectively and are configured to be connected with an external building structure; the restraining sleeve is fixedly connected with the first connecting plate and wraps the core rod, and a gap exists between the core rod and the restraining sleeve; the damping unit comprises a damper shell and a piston, the damper shell is provided with a damping chamber formed by a sealed cavity, the piston is arranged in the damping chamber, the restraining sleeve penetrates through the damping chamber, the piston is fixed to the restraining sleeve, the damping chamber is filled with Newtonian liquid, and the damper shell is further fixedly connected with the core rod. Compared with the prior art, the advantages of viscous energy dissipation and buckling restrained energy dissipation can be exerted at the same time, the energy dissipation capacity of the damper is improved, the production cost is reduced, and the energy dissipation requirements at different deformation speeds can be met.

Description

Technical Field

[0001] This invention belongs to the field of structural seismic resistance and vibration control technology, and relates to a composite viscous damper with an integrated buckling restraint energy dissipation system. Background Technology

[0002] Seismic resistance and vibration reduction of building structures mainly rely on additional dampers. Based on their working mechanism, dampers mainly include displacement-dependent, velocity-dependent, and acceleration-dependent types. Common dampers have single functions and limited application scenarios.

[0003] Viscous dampers are velocity-dependent dampers, exhibiting weak energy dissipation and load-bearing capacity under low-velocity deformation, and are commonly used for structural vibration control. Dampers based on buckling restraint mechanisms are displacement-dependent dampers, with deformation and load-bearing capacity showing little correlation with deformation rate, and are often used to improve the seismic performance of structures. Both types of dampers have limited performance characteristics, severely restricting their application scenarios and requiring further improvement.

[0004] For example, Chinese patent application CN114991335A provides a method that combines a metal damper and a viscous damper in parallel within the same damper, employs a high section modulus viscous damper sleeve and core structure, incorporates cross stiffening ribs and a piston rod, and sets up an isolation layer to reduce substructures and connecting components, thereby achieving overall buckling resistance. However, the load-bearing force transmission and energy dissipation mechanism of this existing composite damper scheme is unclear, and its construction is complex. Summary of the Invention

[0005] The purpose of this invention is to provide a composite viscous damper that integrates a buckling constraint energy dissipation system. It has a simple structure and a high energy dissipation level. By constructing a buckling constraint energy dissipation system and a viscous energy dissipation system, it can meet the structural energy dissipation requirements under different deformation velocities.

[0006] The objective of this invention can be achieved through the following technical solutions: A composite viscous damper integrating a buckling-restrained energy dissipation system, comprising: Deformable and buckling mandrel; The first connecting plate and the second connecting plate are respectively fixedly disposed at both ends of the core rod and are configured to connect to the external building structure; A constraint sleeve is fixedly connected to the first connecting plate and covers the mandrel, with a gap between the mandrel and the constraint sleeve. A damping unit includes a damper housing with a damping chamber formed by a sealed cavity, and a piston placed in the damping chamber through which the constraint sleeve passes. The piston is fixed to the constraint sleeve, and the damping chamber is filled with Newtonian fluid. The damper housing is also fixedly connected to the mandrel.

[0007] Furthermore, the mandrel is also thinned in the middle section of the region placed within the constraint sleeve to form a weakened section with a smaller size than the rest of the region.

[0008] More preferably, the diameter of the weakened section is 1 / 2 to 4 / 5 of the diameter of the rest of the mandrel, which can provide a relatively good buckling restraint energy dissipation space.

[0009] Furthermore, the gap between the mandrel and the constraint sleeve is 1 / 10 to 1 / 4 of the mandrel diameter.

[0010] Furthermore, the mandrel is made of metal, such as shape memory alloys or low yield point steel, which have good buckling restraint energy dissipation performance.

[0011] Furthermore, a gap is left between the piston and the inner wall of the damping chamber.

[0012] Furthermore, the damper housing includes a first end plate, a second end plate, and a third end plate arranged in parallel and spaced apart. The first end plate and the second end plate are connected to form the damping chamber by a first side plate. The second end plate and the third end plate are connected as a whole by a second side plate. The middle portions of the first end plate and the second end plate are respectively provided with through holes for the constraint sleeve to pass through.

[0013] Furthermore, a first sealing ring and a second sealing ring are respectively provided at the through holes on the first end plate and the second end plate.

[0014] Furthermore, the third end plate is fixedly connected to the mandrel.

[0015] Furthermore, the first end plate and the second end plate are also provided with connection holes configured to connect with the external building structure.

[0016] Compared with the prior art, the present invention has the following advantages: (1) The composite viscous damper with integrated buckling constraint energy dissipation system provided by the present invention integrates the buckling constraint energy dissipation system into the viscous damper to form a composite damper, which is beneficial to give full play to the advantages of different energy dissipation modes, improve the energy dissipation capacity of the damper, and expand the application scenarios of single dampers. In addition, in terms of construction, the buckling constraint energy dissipation system is composited inside the viscous damper, which can effectively reduce the size of the damper.

[0017] (2) The composite viscous damper with integrated buckling constraint energy dissipation system provided by the present invention has a constraint sleeve that can serve as a buckling constraint element in the buckling constraint energy dissipation system and also as a piston rod element in the viscous energy dissipation system; the mandrel serves as the core force transmission component of the damper and is also the core energy dissipation component of the buckling constraint energy dissipation system. Therefore, the composite viscous damper with integrated buckling constraint energy dissipation system provided by the present invention has multiple components with multiple functions, low material utilization, and is conducive to reducing production costs.

[0018] (3) The composite viscous damper with integrated buckling constraint energy dissipation system provided by the present invention can provide energy dissipation capacity by buckling constraint energy dissipation system under low-speed deformation, effectively making up for the shortcomings of conventional viscous dampers that cannot dissipate energy under low-speed deformation; under high-speed deformation, buckling constraint energy dissipation system and viscous energy dissipation system dissipate energy at the same time, enhancing the energy dissipation level of the damper. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the composite viscous damper structure of the integrated buckling restraint energy dissipation system of the present invention; Figure 2 This is a schematic diagram of the stress and deformation of the composite viscous damper in the integrated buckling restraint energy dissipation system of the present invention; Explanation of markings in the diagram: 1. First connecting plate; 2. Constraint sleeve; 3. Mandrel; 4. First sealing ring; 5. Piston; 6. Damper housing; 61. First end plate; 62. First side plate; 63. Second end plate; 64. Second side plate; 65. Third end plate; 7. Second connecting plate; 8. Second sealing ring; 9. Newtonian fluid; 10. Damping chamber. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Unless otherwise specified, the functional components or structures in the following embodiments or examples are conventional components or structures used in the art to achieve the corresponding functions.

[0024] To meet the structural energy dissipation requirements under different deformation rates, this invention provides a composite viscous damper integrating a buckling restraint energy dissipation system. Please refer to [link to relevant documentation]. Figure 1 and Figure 2 As shown, including: Deformable buckling mandrel 3; The first connecting plate 1 and the second connecting plate 7 are respectively fixedly disposed at both ends of the core rod 3 and are configured to connect to the external building structure; A constraint sleeve 2 is fixedly connected to the first connecting plate 1 and covers the mandrel 3, with a gap between the mandrel 3 and the constraint sleeve 2. The damping unit includes a damper housing 6 of a damping chamber 10 formed by a sealed cavity, and a piston 5 placed inside the damping chamber 10 through which the constraint sleeve 2 passes. The piston 5 is fixed to the constraint sleeve 2. The damping chamber 10 is filled with Newtonian fluid 9. The damper housing 6 is also fixedly connected to the mandrel 3.

[0025] In some specific embodiments, the mandrel 3 is further thinned in the middle portion of the region placed within the constraint sleeve 2 to form a weakened section with a smaller size than the rest of the region.

[0026] In a more specific embodiment, the diameter of the weakened section is 1 / 2 to 4 / 5 of the diameter of the remaining area of ​​the core rod 3.

[0027] In some specific embodiments, the gap between the mandrel 3 and the constraint sleeve 2 is 1 / 10 to 1 / 4 of the diameter of the mandrel.

[0028] In some specific embodiments, the mandrel 3 is made of metal, such as shape memory alloys or low yield point steel, which have good buckling restraint energy dissipation performance.

[0029] In some specific embodiments, a gap is left between the piston 5 and the inner wall of the damping chamber 10.

[0030] In some specific embodiments, the damper housing 6 includes a first end plate 61, a second end plate 63, and a third end plate 65 arranged in parallel intervals. The first end plate 61 and the second end plate 63 are connected to form the damping chamber 10 by a first side plate 62. The second end plate 63 and the third end plate 65 are connected as a whole by a second side plate 64. The middle portions of the first end plate 61 and the second end plate 63 are respectively provided with through holes for the constraint sleeve 2 to pass through.

[0031] In a more specific embodiment, a first sealing ring 4 and a second sealing ring 8 are respectively provided at the through holes on the first end plate 61 and the second end plate 63.

[0032] In a more specific embodiment, the third end plate 65 is fixedly connected to the core rod 3.

[0033] In some specific embodiments, the first end plate 61 and the second end plate 63 are further provided with connection holes configured to connect with an external building structure.

[0034] Each of the above implementation methods can be implemented individually, or in any combination of two or more.

[0035] The above implementation methods will be described in more detail below with reference to specific embodiments.

[0036] Example 1: To meet the structural energy dissipation requirements under different deformation rates, this embodiment provides a composite viscous damper integrating a buckling restraint energy dissipation system. Please refer to [link to relevant documentation]. Figure 1 and Figure 2 As shown, including: Deformable buckling mandrel 3; The first connecting plate 1 and the second connecting plate 7 are respectively fixedly disposed at both ends of the core rod 3 and are configured to connect to the external building structure; A constraint sleeve 2 is fixedly connected to the first connecting plate 1 and covers the mandrel 3, with a gap between the mandrel 3 and the constraint sleeve 2. The damping unit includes a damper housing 6 of a damping chamber 10 formed by a sealed cavity, and a piston 5 placed inside the damping chamber 10 through which the constraint sleeve 2 passes. The piston 5 is fixed to the constraint sleeve 2. The damping chamber 10 is filled with Newtonian fluid 9. The damper housing 6 is also fixedly connected to the mandrel 3.

[0037] The core rod 3 undergoes cross-sectional thinning in the middle portion of the region placed within the constraint sleeve 2 to form a weakened section with a smaller size than the rest of the region. The diameter of the weakened section is approximately 2 / 3 of the diameter of the rest of the core rod 3. The outer diameter of the core rod 3 is slightly smaller than the inner diameter of the constraint sleeve 2, and the gap between the core rod 3 and the constraint sleeve 2 is approximately 1 / 6. In this embodiment, the core rod 3 is made of shape memory alloy. A gap is also maintained between the piston 5 and the inner wall of the damping chamber 10.

[0038] The damper housing 6 includes a first end plate 61, a second end plate 63, and a third end plate 65 arranged in parallel at intervals. The first end plate 61 and the second end plate 63 are connected by a first side plate 62 to form the damping chamber 10. The second end plate 63 and the third end plate 65 are connected as a whole by a second side plate 64. The middle portions of the first end plate 61 and the second end plate 63 are respectively provided with through holes for the constraint sleeve 2 to pass through. The through holes on the first end plate 61 and the second end plate 63 are respectively provided with a first sealing ring 4 and a second sealing ring 8 to prevent Newtonian fluid 9 from leaking out when relative sliding occurs between the constraint sleeve 2 and the damping chamber 10. The third end plate 65 is fixedly connected to the mandrel 3.

[0039] The first end plate 61 and the second end plate 63 are also provided with connection holes configured to connect with the external building structure.

[0040] The working principle of the damper provided in this embodiment can be found in [reference needed]. Figure 2 As shown: Under tensile deformation, the mandrel 3 is stretched, which drives the damper shell 6 to move. As the Newtonian liquid 9 moves together with the damping chamber 10, a viscous energy dissipation effect is generated between it and the piston 5.

[0041] Under compression deformation, the mandrel 3 buckles under pressure, and the constraint sleeve 2 provides buckling constraint space. At the same time, the damper shell 6 moves. Similarly, as the Newtonian fluid 9 moves together with the damping chamber 10, a viscous energy dissipation effect is generated between it and the piston 5.

[0042] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A composite viscous damper integrated with a buckling-restrained energy dissipation system, characterized by, The application relates to a core rod for a building structure, which comprises the following parts: a deformable and bendable core rod; a first connecting plate and a second connecting plate, which are respectively fixedly arranged at two ends of the core rod and are configured to be connected with external building structures; a constraint sleeve, which is fixedly connected with the first connecting plate and covers the core rod, and a gap exists between the core rod and the constraint sleeve; a damping unit, which comprises a damper shell formed by a sealed cavity and a piston arranged in the damping chamber, the damping chamber is passed through by the constraint sleeve, the piston is fixed on the constraint sleeve, the damping chamber is filled with Newtonian liquid, and the damper shell is further fixedly connected with the core rod.

2. The integrated buckling-restrained energy dissipation system composite viscous damper according to claim 1, wherein, The middle part of the core rod in the area arranged in the constraint sleeve is further thinned in section to form a weakened section with a smaller size than the remaining area.

3. The integrated buckling-restrained energy dissipation system composite viscous damper of claim 2, wherein, The diameter of the weakened section is 1 / 2-4 / 5 of the diameter of the remaining area of the core rod.

4. The integrated buckling-restrained energy dissipation system composite viscous damper of claim 1, wherein, The gap between the core rod and the constraint sleeve is 1 / 10-1 / 4 of the diameter of the core rod.

5. The integrated buckling-restrained energy dissipation system composite viscous damper of claim 1, wherein, The material of the core rod is metal.

6. The integrated buckling-restrained energy dissipation system composite viscous damper of claim 1, wherein A gap further exists between the piston and the inner wall of the damping chamber.

7. The integrated buckling-restrained energy dissipation system composite viscous damper of claim 1, wherein The damper shell comprises first, second and third end plates arranged in parallel and spaced apart, the first and second end plates are surrounded by a first side plate to form the damping chamber, the second and third end plates are connected into a whole through a second side plate, and the middle parts of the first and second end plates are respectively provided with through holes for the constraint sleeve to pass through.

8. The integrated buckling-restrained energy dissipation system composite viscous damper of claim 7, wherein, First and second sealing rings are respectively arranged at the through holes of the first and second end plates.

9. The integrated buckling-restrained energy dissipation system composite viscous damper of claim 7, wherein, The third end plate is fixedly connected with the core rod.

10. The integrated buckling-restrained energy dissipation system composite viscous damper of claim 7, wherein, Connecting holes configured to be connected with external building structures are further arranged on the first and second end plates.

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