Damper for adjusting initial stiffness of tension cable and installation method

Abstract

This invention relates to the field of building vibration reduction structures, and more particularly to a damper and installation method for adjusting the initial stiffness of a tension cable. The damper includes a first mounting base, a second mounting base, tension cables, and an energy dissipation component. The first and second mounting bases are spaced apart. The energy dissipation component includes a first arc-shaped energy dissipation element, a second arc-shaped energy dissipation element, and a core energy dissipation element. The first and second arc-shaped energy dissipation elements are connected between the first and second mounting bases, and are arranged back-to-back to form an overlapping internal mounting cavity. The core energy dissipation element is installed in the internal mounting cavity. Multiple tension cables are provided and divided into two groups, respectively connected to the first and second arc-shaped energy dissipation elements. In this invention, the energy is dissipated by serrated rubber friction within the core energy dissipation device, by a viscous damping device connected by upper and lower viscous plates, and by the deformation of the arc-shaped soft steel. Furthermore, the initial stiffness of the damper is adjusted by regulating the length of the tension cable.

Description

Technical Field

[0001] This invention relates to the field of building vibration reduction structures, specifically to a damper and installation method for adjusting the initial stiffness of a tensioned steel cable. Background Technology

[0002] Traditional buildings primarily absorb seismic energy through structural deformation. The initial stiffness of a tension cable refers to its ability to resist deformation under external forces, reflecting its structural characteristics and mechanical properties in its initial state. The initial stiffness of a tension cable depends on several factors, including its material, cross-sectional shape, dimensions, prestress level, and support conditions.

[0003] Adjusting the initial stiffness of a tension cable typically involves adjusting the prestress and support conditions of the tension cable. CN106337592B discloses an adjustable early stiffness rubber air spring damper. The guide sleeve also includes a counter-pressure device comprising two sets of pre-stressed tension cables (each with at least three cables) and two floating pressure plates. The two sets of pre-stressed tension cables are distributed in a straight line within the annular space. One end of one set of pre-stressed tension cables is fixed to a floating pressure plate adjacent to the second end cap, and the other end passes through a floating pressure plate adjacent to the driving component and is anchored to the driving component by a self-locking tensioning anchor. Similarly, one end of the other set of pre-stressed tension cables is fixed to a floating pressure plate adjacent to the driving component, and the other end passes through a floating pressure plate adjacent to the second end cap and is anchored to the second end cap by a self-locking tensioning anchor. The tensioned two sets of pre-stressed tension cables ensure that the rubber air spring is always clamped between the two floating pressure plates. It uses rubber air springs to generate elastic compression deformation to dissipate energy, and is not affected by the direction of the load. However, its shock absorption and energy dissipation components are singular and the arrangement is simple. The load-bearing capacity is limited and the adjustment range is large, which affects the adjustment accuracy. Summary of the Invention

[0004] To address the problem that energy-dissipating components in existing vibration damping structures are singular and non-replaceable, this invention provides a damper with adjustable initial stiffness via tensioned steel cables and its installation method.

[0005] This invention is achieved through the following technical solution: A damper for adjusting the initial stiffness of a tension cable includes a first mounting base, a second mounting base, a tension cable, and an energy dissipation component. The first mounting base and the second mounting base are spaced apart. The energy dissipation component includes a first arc-shaped energy dissipation element, a second arc-shaped energy dissipation element, and a core energy dissipation element. The first arc-shaped energy dissipation element and the second arc-shaped energy dissipation element are connected between the first mounting base and the second mounting base. The first arc-shaped energy dissipation element and the second arc-shaped energy dissipation element are arranged back to back and form an overlapping internal mounting cavity. The core energy dissipation element is installed in the internal mounting cavity. Multiple tension cables are provided and divided into two groups, which are respectively connected to the first arc-shaped energy dissipation component and the second arc-shaped energy dissipation component.

[0006] Preferably, the first mounting base and the second mounting base have the same structure and dimensions. The first mounting base includes an upper mounting base, a lower mounting base, and a viscous damping element. The upper mounting base includes an upper end plate and multiple upper viscous plates, which are fixed to the upper end plate at intervals and in parallel. The lower mounting base includes a lower end plate and multiple lower viscous plates, which are fixed to the lower end plate at intervals and in parallel. The lower viscous plates and the upper viscous plates are alternately arranged in parallel. The end of the upper viscous plate away from the upper end plate is connected to the lower end plate through the viscous damping element, and the viscous damping element corresponds one-to-one with the upper viscous plate. The upper end plate is used to connect the first arc-shaped energy dissipation element, and the lower end plate is used to connect the second arc-shaped energy dissipation element.

[0007] Preferably, the first mounting base and the second mounting base are arranged opposite each other at intervals. An upper connecting plate is fixedly provided on one side of the two upper end plates, and the upper connecting plate is used to connect the first arc-shaped energy-consuming component. A lower connecting plate is fixedly provided on one side of the two lower end plates, and the lower connecting plate is used to connect the second arc-shaped energy-consuming component. The upper connecting plate and the lower connecting plate on the same mounting base are arranged opposite each other.

[0008] Preferably, both the first arc-shaped energy-consuming component and the second arc-shaped energy-consuming component include multiple parallel arc-shaped soft steel components. The arc-shaped soft steel components of the first arc-shaped energy-consuming component and the arc-shaped soft steel components of the second arc-shaped energy-consuming component are alternately arranged. The arc-shaped soft steel components of the first arc-shaped energy-consuming component are connected to the upper connecting plate, and the arc-shaped soft steel components of the second arc-shaped energy-consuming component are connected to the lower connecting plate.

[0009] Preferably, the curved mild steel part is made of mild steel with a yield strength of 80MPa~220MPa.

[0010] Preferably, the core energy-consuming component includes an energy-consuming shell and at least two friction energy-consuming components. The energy-consuming shell is hollow and open at both ends, and the axis of the energy-consuming shell is parallel to the arrangement axis of the arc-shaped soft steel component. The friction energy-consuming components are elongated, and their length axis is parallel to the length axis of the energy-consuming shell.

[0011] Preferably, the friction energy dissipation component includes a first rubber strip and a second rubber strip. The top of the first rubber strip is connected to the top of the energy dissipation housing, and the bottom of the second rubber strip is connected to the bottom of the energy dissipation housing. The first rubber strip and the second rubber strip are attached to each other, and the attached side is serrated.

[0012] Preferably, the energy-consuming shell is further provided with an energy-consuming elastic column inside, the axis of the energy-consuming elastic column is perpendicular to the axis of the energy-consuming shell, and the friction energy-consuming components are evenly divided into two groups and symmetrically arranged on both sides of the energy-consuming elastic column.

[0013] Preferably, the curved soft steel component has mounting holes at both ends, the tensioned steel cable passes through the mounting holes at both ends, and is fixed by anchor connectors and compression anchors.

[0014] Preferably, a connecting rod is provided at the end of the arc-shaped soft steel component, which passes through the upper connecting plate and is connected to the fixing nut, and a rubber pad is provided between the arc-shaped soft steel component and the upper connecting plate.

[0015] A method for installing a damper with adjustable initial stiffness for tensioned steel cables includes the following steps: S1, with the first and second mounting seats arranged at intervals; S2, the first arc-shaped energy-consuming component and the second arc-shaped energy-consuming component are installed between the first mounting base and the second mounting base to form a mounting cavity; S3 places the core energy-consuming components in the mounting cavity; S4. Install the tension cable and use the tension cable to adjust the deformation of the first and second arc-shaped energy dissipation components to change the initial stiffness of the damper.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a damper for adjusting the initial stiffness of a tensioned steel cable, which is equipped with an energy dissipation component consisting of a first arc-shaped energy dissipation component, a second arc-shaped energy dissipation component, and a core energy dissipation component to dissipate energy in multiple layers. The first arc-shaped energy dissipation component and the second arc-shaped energy dissipation component are arranged alternately inside the damper and are tensioned by the tensioned steel cable to adjust their initial stiffness, thereby making the damper more adaptable.

[0017] Furthermore, the upper and lower viscous plates and their connected damping devices are arranged alternately on both sides of the damper, which can better utilize space and achieve multi-level energy dissipation effects.

[0018] Furthermore, the core energy-consuming device dissipates energy through friction between the first and second rubber strips. To prevent excessive deformation of the core energy-consuming device, an energy-dissipating elastic column is placed inside to limit its movement.

[0019] Furthermore, the rubber pad between the curved soft steel component and the upper connecting plate can effectively buffer the load transmitted from the upper part. Excessive instantaneous force on the damper can cause the damper to fail. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a damper for adjusting the initial stiffness of a tensioned steel cable according to the present invention. Figure 2 This is a front view of a damper for adjusting the initial stiffness of a tensioned steel cable according to the present invention; Figure 3 This is a top view of a damper for adjusting the initial stiffness of a tensioned steel cable according to the present invention; Figure 4 This is a top view from another perspective of the damper for adjusting the initial stiffness of a tensioned steel cable according to the present invention. Figure 5 This is a schematic diagram of the core energy-dissipating component in a damper for adjusting the initial stiffness of a tensioned steel cable according to the present invention.

[0021] In the diagram, 1-1 is the upper end plate; 1-2 is the lower end plate; 1-3 is the upper connecting plate; 1-4 is the lower connecting plate; 1-5 is the rubber pad; 2-1 is the upper adhesive plate; 2-2 is the lower adhesive plate; 2-3 is the viscous damping component; 3-1 is the tension steel cable; 3-2 is the anchor connector; 3-3 is the extrusion anchor; 4-1 is the arc-shaped soft steel; 4-2 is the energy-dissipating shell; 4-3 is the energy-dissipating elastic column; 4-4 is the first rubber strip; and 4-5 is the second rubber strip. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to specific embodiments. These descriptions are for explanation purposes only and are not intended to limit the scope of the invention.

[0023] This invention discloses a damper for adjusting the initial stiffness of a tensioned steel cable, with reference to... Figure 1 , 2 A damper for adjusting the initial stiffness of a tension cable includes a first mounting base, a second mounting base, a tension cable 3-1, and an energy dissipation component, wherein the first mounting base and the second mounting base are arranged opposite each other at an interval. The first mounting base and the second mounting base have the same structure and dimensions. The first mounting base includes an upper mounting base, a lower mounting base, and viscous damping elements 2-3. The upper mounting base includes an upper end plate 1-1 and multiple upper viscous plates 2-1, which are fixed parallel to each other at intervals on the upper end plate 1-1. The lower mounting base includes a lower end plate 1-2 and multiple lower viscous plates 2-2, which are fixed parallel to each other at intervals on the lower end plate 1-2. The lower viscous plates 2-2 and the upper viscous plates 2-1 are alternately arranged in parallel. The end of the upper viscous plate 2-1 away from the upper end plate 1-1 is connected to the lower end plate 1-2 through the viscous damping elements 2-3. The viscous damping elements 2-3 correspond one-to-one with the upper viscous plates 2-1. The upper end plate 1-1 is used to connect the first arc-shaped energy dissipation element, and the lower end plate 1-2 is used to connect the second arc-shaped energy dissipation element. In this embodiment, six upper viscous plates 2-1 and five lower viscous plates 2-2 are respectively arranged in the spaces formed by the six upper viscous plates 2-1. A gap of 2-5 mm is left between adjacent upper and lower viscous plates 2-1 to prevent them from colliding during upward movement. During deformation, the viscous fluid inside the viscous damper hinders deformation, thereby achieving the function of energy dissipation.

[0024] Reference Figure 3 , 4An upper connecting plate 1-3 is fixedly installed on one side of the two upper end plates 1-1 facing each other. The upper connecting plate 1-3 is used to connect the first arc-shaped energy-consuming component. A lower connecting plate 1-4 is fixedly installed on one side of the two lower end plates 1-2 facing each other. The lower connecting plate 1-4 is used to connect the second arc-shaped energy-consuming component. The upper connecting plate 1-3 and the lower connecting plate 1-4 on the same mounting base are arranged opposite each other.

[0025] The energy-consuming component includes a first arc-shaped energy-consuming element, a second arc-shaped energy-consuming element, and a core energy-consuming element. The first and second arc-shaped energy-consuming elements are connected between the first and second mounting bases. In this embodiment, the length of the upper adhesive plate 2-1 only occupies a portion of the upper end plate 1-1, which makes a portion of the upper end plate 1-1 suspended. A mounting platform is provided on the suspended portion, and a long groove is formed along its length on the mounting platform. Then, an upper connecting plate 1-3 is welded to the elongated opening of the long groove. One side of the upper connecting plate 1-3 is parallel to the inner side of the mounting platform, and the other side extends out of the mounting platform, with the extended portion used to connect the first arc-shaped energy-consuming element. Similarly, the connection between the lower mounting base and the lower connecting plate 1-4, and the connection between the lower connecting plate 1-4 and the second arc-shaped energy-consuming element can be realized.

[0026] The first and second arc-shaped energy-consuming components are arranged back-to-back and form an overlapping internal mounting cavity, in which the core energy-consuming component is installed. (Refer to...) Figure 3 , 4 Both the first and second arc-shaped energy-dissipating components include multiple parallel arc-shaped mild steel pieces 4-1. The arc-shaped mild steel pieces 4-1 of the first and second arc-shaped energy-dissipating components are alternately arranged with gaps (e.g., 2-5 mm) between them to prevent interference between the energy-dissipating components during deformation. The arc-shaped mild steel pieces 4-1 of the first arc-shaped energy-dissipating component are connected to the upper connecting plate 1-3, and the arc-shaped mild steel pieces 4-1 of the second arc-shaped energy-dissipating component are connected to the lower connecting plate 1-4. In this embodiment, the arc-shaped mild steel pieces 4-1 are made of mild steel with a yield strength of 80 MPa to 220 MPa. The end of the arc-shaped mild steel 4-1 is provided with a connecting rod that passes through the upper connecting plate 1-3 and is connected to the fixing nut. A rubber pad 1-5 is provided between the arc-shaped mild steel 4-1 and the upper connecting plate 1-3. The rubber pad 1-5 can effectively buffer the load transmitted from the upper part. Excessive instantaneous force on the damper can cause the damper to break.

[0027] Reference Figure 5The core energy-consuming component includes an energy-consuming outer shell 4-2 and an energy-consuming elastic column 4-3. The axis of the energy-consuming elastic column 4-3 is perpendicular to the axis of the energy-consuming outer shell 4-2. The friction energy-consuming components are evenly divided into two groups and symmetrically arranged on both sides of the energy-consuming elastic column 4-3. In this embodiment, the energy-consuming elastic column 4-3 is made of rubber material and is cylindrical. It has mounting bosses at both ends. The inner wall of the energy-consuming outer shell 4-2 has mounting grooves that mate with the mounting bosses. During installation, the mounting bosses are squeezed to achieve assembly with the mounting grooves. The energy-consuming elastic column 4-3 is mainly used to prevent excessive deformation of the core energy-consuming device and plays a protective and limiting role.

[0028] The energy-dissipating outer shell 4-2 also contains at least two friction energy-dissipating components. The energy-dissipating outer shell 4-2 is hollow and open at both ends. The axis of the energy-dissipating outer shell 4-2 is parallel to the arrangement axis of the arc-shaped mild steel 4-1. The friction energy-dissipating components are elongated, and their length axis is parallel to the length axis of the energy-dissipating outer shell 4-2. In this embodiment, the energy-dissipating outer shell 4-2 is supported by energy-dissipating mild steel with a yield strength of 205~240MPa. Two friction energy-dissipating components are provided, and the number is selected according to the actual building load conditions.

[0029] The friction energy dissipation component includes a first rubber strip 4-4 and a second rubber strip 4-5. The top of the first rubber strip 4-4 is connected to the top of the energy dissipation shell 4-2, and the bottom of the second rubber strip 4-5 is connected to the bottom of the energy dissipation shell 4-2. The first rubber strip 4-4 and the second rubber strip 4-5 are in contact with each other, and the contact side is serrated.

[0030] Multiple tension cables 3-1 are provided and divided into two groups, which are respectively connected to the arc-shaped soft steel 4-1 of the first arc-shaped energy dissipation component and the arc-shaped soft steel 4-1 of the second arc-shaped energy dissipation component. Mounting holes are provided at both ends of the arc-shaped soft steel 4-1, and the two ends of the tension cables 3-1 pass through these mounting holes and are fixed using anchor connectors 3-2 and compression anchors 3-3. The initial stiffness of the tension cables 3-1 can be adjusted by tensioning them, allowing the damper to have better adaptability.

[0031] This invention also discloses an installation method for a damper that adjusts the initial stiffness of a tensioned steel cable, comprising the following steps: S1, firstly, the first mounting base and the second mounting base are arranged respectively, specifically: the upper end plate 1-1 and the lower end plate 1-2 are respectively connected to the external structure to transmit the axial tensile and compressive forces transmitted by the external structure; one end of the upper viscous plate 2-1 is welded to the upper end plate 1-1 and connected to the viscous damper device, and one end of the lower viscous plate 2-2 is welded to the lower end plate 1-2 and connected to the viscous damper device; one end of the viscous damper device is connected to the viscous plate and the other end is connected to the upper and lower end plates 1-2; S2, the first arc-shaped energy-consuming component and the second arc-shaped energy-consuming component are installed between the first mounting base and the second mounting base; specifically, one end of the upper and lower connecting plate 1-4 is connected to the upper and lower end plate 1-2, and the other end is connected to the arc-shaped soft steel 4-1, and a rubber pad 1-5 is placed at the connecting end; S3, the core energy-consuming component is placed in the mounting cavity formed by the first arc-shaped energy-consuming component and the second arc-shaped energy-consuming component; S4, Anchor connectors 3-2 are installed at the ends of the arc-shaped mild steel 4-1, and compression anchors 3-3 are placed inside the anchor connectors 3-2. The tensioned steel cable 3-1 passes through the compression anchors 3-3 on both sides of each arc-shaped mild steel 4-1. Each compression anchor 3-3 is used to lock the tensioned steel cable 3-1. The deformation of the arc-shaped mild steel 4-1 is controlled by adjusting the length of the steel cable, thereby changing the initial stiffness of the damper. A core energy dissipation device is placed between the arc-shaped mild steel 4-1. Under the deformation of the arc-shaped mild steel 4-1, the core energy dissipation device will deform under pressure, thereby causing the internal serrated rubber to dissipate energy through friction. The internal cylindrical rubber can effectively prevent the core energy dissipation shell 4-2 from deforming too much.

[0032] In practical operation, corresponding bolt holes need to be made on the upper end plate 1-1 and lower end plate 1-2 of the damper due to different structural features. The upper and lower adhesive plates 2-2 and the damping devices connected to them are arranged alternately on both sides of the damper. The core energy dissipation device inside the damper dissipates energy through friction between the rubbers. To prevent excessive deformation of the core energy dissipation device, a cylindrical rubber is placed inside it to limit its movement. A square rubber pad 1-5 is placed directly between the connecting plate and the arc-shaped soft steel 4-1, which can effectively buffer the load transmitted from the upper part, preventing the damper from being damaged by excessive instantaneous force.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the technical solution of the present invention in any way. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can be modified and replaced in several simple ways, and these modifications and replacements are all within the scope of protection covered by the claims.

Claims

1. A damper for tuning the initial stiffness of a tensioned cable, characterized by, It includes a first mounting base, a second mounting base, a tension steel cable (3-1), and an energy dissipation component. The first mounting base and the second mounting base are spaced apart. The energy dissipation component includes a first arc-shaped energy dissipation component, a second arc-shaped energy dissipation component, and a core energy dissipation component. The first arc-shaped energy dissipation component and the second arc-shaped energy dissipation component are connected between the first mounting base and the second mounting base. The first arc-shaped energy dissipation component and the second arc-shaped energy dissipation component are arranged back to back and form an overlapping internal mounting cavity. The core energy dissipation component is installed in the internal mounting cavity. Multiple tension cables (3-1) are provided and divided into two groups, which are respectively connected to the first arc-shaped energy dissipation component and the second arc-shaped energy dissipation component; The first mounting base and the second mounting base have the same structure and dimensions. The first mounting base includes an upper mounting base, a lower mounting base, and viscous damping components (2-3). The upper mounting base includes an upper end plate (1-1) and multiple upper viscous plates (2-1), which are fixed parallel to each other at intervals. The lower mounting base includes a lower end plate (1-2) and multiple lower viscous plates (2-2), which are fixed parallel to each other at intervals. On the lower end plate (1-2), the lower adhesive plate (2-2) and the upper adhesive plate (2-1) are alternately arranged in parallel. The end of the upper adhesive plate (2-1) away from the upper end plate (1-1) is connected to the lower end plate (1-2) through the adhesive damping element (2-3). The adhesive damping element (2-3) corresponds one-to-one with the upper adhesive plate (2-1). The upper end plate (1-1) is used to connect the first arc-shaped energy dissipation element, and the lower end plate (1-2) is used to connect the second arc-shaped energy dissipation element. The first mounting base and the second mounting base are arranged opposite each other at intervals. An upper connecting plate (1-3) is fixedly installed on one side of the two upper end plates (1-1) facing each other. The upper connecting plate (1-3) is used to connect the first arc-shaped energy-consuming component. A lower connecting plate (1-4) is fixedly installed on one side of the two lower end plates (1-2) facing each other. The lower connecting plate (1-4) is used to connect the second arc-shaped energy-consuming component. The upper connecting plate (1-3) and the lower connecting plate (1-4) on the same mounting base are arranged opposite each other. Both the first and second arc-shaped energy-consuming components include multiple parallel arc-shaped soft steel (4-1) components. The arc-shaped soft steel (4-1) components of the first and second arc-shaped energy-consuming components are alternately arranged. The arc-shaped soft steel (4-1) components of the first and second arc-shaped energy-consuming components are connected to the upper connecting plate (1-3), and the arc-shaped soft steel (4-1) components of the second arc-shaped energy-consuming component are connected to the lower connecting plate (1-4). The core energy-consuming component includes an energy-consuming shell (4-2) and at least two friction energy-consuming components. The energy-consuming shell (4-2) is hollow and open at both ends. The axis of the energy-consuming shell (4-2) is parallel to the arrangement axis of the arc-shaped mild steel (4-1) component. The friction energy-consuming components are elongated and their length axis is parallel to the length axis of the energy-consuming shell (4-2). The friction energy dissipation component includes a first rubber strip (4-4) and a second rubber strip (4-5). The top of the first rubber strip (4-4) is connected to the top of the energy dissipation shell (4-2), and the bottom of the second rubber strip (4-5) is connected to the bottom of the energy dissipation shell (4-2). The first rubber strip (4-4) and the second rubber strip (4-5) are in contact with each other, and the contact side is serrated. The energy-consuming outer shell (4-2) is also equipped with an energy-consuming elastic column (4-3). The axis of the energy-consuming elastic column (4-3) is perpendicular to the axis of the energy-consuming outer shell (4-2). The friction energy-consuming components are evenly divided into two groups and symmetrically arranged on both sides of the energy-consuming elastic column (4-3).

2. The damper for adjusting initial stiffness of a tension cable according to claim 1, wherein The curved mild steel (4-1) piece is made of mild steel with a yield strength of 80MPa~220MPa; The curved mild steel (4-1) has mounting holes at both ends. The tensioned steel cable (3-1) passes through the mounting holes at both ends and is fixed by the anchor connector (3-2) and the compression anchor (3-3).

3. The damper for tuning initial stiffness of a tension cable according to claim 1, wherein A connecting rod is provided at the end of the arc-shaped mild steel (4-1) piece, which passes through the upper connecting plate (1-3) and is connected to the fixing nut. A rubber pad (1-5) is provided between the arc-shaped mild steel (4-1) piece and the upper connecting plate (1-3).

4. A method of installing a damper for adjusting the initial stiffness of a tension cable according to any one of claims 1 to 3, characterized in that, Includes the following steps: S1, with the first and second mounting seats arranged at intervals; S2, the first arc-shaped energy-consuming component and the second arc-shaped energy-consuming component are installed between the first mounting base and the second mounting base to form a mounting cavity; S3 places the core energy-consuming components in the mounting cavity; S4. Install the tension cable (3-1) and use the tension cable (3-1) to adjust the deformation of the first and second arc-shaped energy dissipation components to change the initial stiffness of the damper.

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