Metal damper with variable out-of-plane stiffness and seismic monitoring function

Abstract

The present application relates to a kind of out-of-plane stiffness variable type metal damper with seismic monitoring function.The present application includes energy dissipation metal plate, friction plate, first box type long support, second box type long support, box type short support, sensor, high-strength bolt, nut, gasket, pre-embedded connecting steel plate, connecting bending-resistant steel plate, threaded bolt hole, anchorage, shear bolt, bending-resistant bolt, pre-embedded I-shaped steel.The damper in the present application is installed in structural member, does not bear the initial gravity load of structure, can provide out-of-plane stiffness for energy dissipation metal plate;when suffering vibration load, the damage condition of damper is detected using sensor;damper is connected by full bolt, convenient to replace;damper support and pre-embedded component are controlled by bending-shear separation, improve the overall performance of damper.

Description

Technical Field

[0001] This invention relates to the field of building energy dissipation and vibration reduction technology, specifically to an out-of-plane variable stiffness metal damper with seismic monitoring function. Background Technology

[0002] In recent years, my country has experienced several severe earthquakes, resulting in enormous casualties and property losses. As the seismic intensity of earthquakes increases in more and more regions, traditional structures are struggling to meet the demands. Therefore, energy dissipation and vibration reduction technology has developed rapidly. By adding energy dissipators to structures, energy is concentrated and dissipated during earthquakes, protecting the main structure from damage or causing only minor damage. After an earthquake, replacing damaged components allows for rapid restoration of structural function, ensuring the safety of people's lives and property.

[0003] Metal dampers are widely used in energy dissipation and vibration reduction design due to their excellent energy dissipation capabilities and insensitivity to ambient temperature. However, most metal dampers utilize in-plane plastic deformation to dissipate energy, resulting in high stiffness and load-bearing capacity. However, they also suffer from drawbacks such as difficult connection and a lack of out-of-plane stiffness in the energy-dissipating metal plate. Furthermore, traditional metal energy dissipators are often welded, leading to excessive stress concentration at the welds, making them prone to cracking and severely reducing damper performance. The welded fixing also makes disassembly and repair difficult after damage. Additionally, the post-earthquake damage to these dampers is not readily apparent. To ensure the normal and safe use of the structure, it may be necessary to replace them all without proper assessment, incurring significant manpower and material costs and increasing post-earthquake structural recovery costs. This is highly detrimental to rapid post-earthquake recovery, casting doubt on their practical application prospects. Summary of the Invention

[0004] This invention aims to overcome the above-mentioned shortcomings of traditional metal dampers and proposes an out-of-plane variable stiffness metal damper with seismic monitoring function, adopting the following technical solution:

[0005] This invention provides an out-of-plane variable stiffness metal damper with seismic monitoring function, comprising: an energy-dissipating metal plate 1, a first box-shaped long support 3, a second box-shaped long support 4, and a box-shaped short support 5. The first box-shaped long support 3 and the second box-shaped long support 4 each cooperate with a box-shaped short support 5 to form a clamping layer. The two clamping layers are respectively clamped on both sides of the energy-dissipating metal plate 1. A friction plate 2 is provided between the clamping layer and the energy-dissipating metal plate 1. The clamping layer, the energy-dissipating metal plate 1, and the friction plate 2 are provided with coaxial through holes, and high-strength bolts 8 are used for fixation.

[0006] The embedded connector includes a fixedly connected bending steel plate 12 and a pre-embedded connecting steel plate 11, wherein the pre-embedded connecting steel plate 11 is fixedly connected to or forms a pre-embedded I-beam 17 on the side away from the energy-consuming metal plate 1.

[0007] The first box-shaped long support 3, the second box-shaped long support 4, and the box-shaped short support 5 are provided with threaded bolt holes 13 on their frames. The threaded bolt holes 13 are coaxial with the pre-set through holes on the pre-embedded connectors and are fixed by high-strength bolts 8.

[0008] Sensors 7 are provided on the first box-shaped long support 3 and / or the second box-shaped long support 4.

[0009] Furthermore, the first box-shaped long support 3 and the second box-shaped long support 4 are installed on opposite sides of different planes, which provides out-of-plane stiffness for the damper; or the first box-shaped long support 3 and the second box-shaped long support 4 are installed on the same side of different planes, which does not provide out-of-plane stiffness for the damper.

[0010] Furthermore, the first box-shaped long support 3 is fitted with a high-strength bolt 8 from the inside out at a position close to the energy-consuming metal plate 1 without contacting it. The nut of the high-strength bolt 8 is placed between the first box-shaped long support 3 and the second box-shaped long support 4 to prevent the connection between the supports from being too tight and causing damage to the metal energy-consuming plate 1.

[0011] Furthermore, sensors 7 are installed on both the first box-shaped long support 3 and the second box-shaped long support 4. The sensors 7 are used to collect, process, and transmit damper deformation data, monitor the damper deformation, convert the data from electrical signals to digital signals, and store them in the data collection, storage, and evaluation device. The damper deformation is evaluated by using the damper deformation limit preset in the module, and finally the damper deformation data is transmitted to the server through the wireless transmission module.

[0012] Furthermore, shear studs 15 and bending studs 16 are uniformly arranged on the surface of the pre-embedded I-beam 17.

[0013] Furthermore, the shear force on the damper is borne by the pre-embedded connecting steel plate 11 and the shear stud 15, and the bending moment on the damper is borne by the connecting bending steel plate 12, the anchor 14 and the bending stud 16.

[0014] The shear capacity of the damper should not exceed the shear capacity of the connecting member, and the bending moment caused by the shear deformation of the damper should be less than the bending capacity of the connecting member. This ensures that during an earthquake, all components of the damper, except for the energy dissipation plate, are in elastic deformation, and no relative deformation occurs between the embedded section and the wall. Simultaneously, sensor 7 collects, processes, and transmits damper deformation data, which is then transmitted to a data collection, storage, and evaluation device. Based on pre-set damper deformation limits, the degree of damage is determined, and the collection, storage, and evaluation device sends excessive deformation data of the damper to the server, alerting engineers to repair or replace the damper. This structural damper is easy to install and replace, can be flexibly arranged in the structure, has low cost, and can be quickly replaced after an earthquake, exhibiting good economic efficiency and practicality.

[0015] This invention is applicable to locations in building structures prone to large shear deformation during earthquakes, such as core tube connecting beams or the upper and lower beams of frame structures. For frame structures with large inter-story distances, appropriately high concrete connecting supports should be installed. Multiple dampers can be connected in parallel, and to enhance frame stiffness, the dampers can be arranged symmetrically at the center.

[0016] This invention utilizes sensors to collect, process, and transmit damper deformation data in real time during earthquakes. A collection, storage, and evaluation device sends excessive deformation data of the damper to a server, alerting engineers and ensuring structural safety. This invention provides out-of-plane stiffness to the energy-dissipating plate, effectively ensuring the damper's ability to dissipate energy through in-plane plastic deformation and improving its performance. This invention employs a fully bolted assembly connection method, simplifying replacement. Furthermore, all components of the damper, except for the energy-dissipating plate, are in elastic deformation, saving costs and enabling rapid recovery after earthquakes. All materials involved in this invention are metals, exhibiting excellent durability after treatment. This invention has a simple structure, a clear mechanical mechanism, and stable mechanical properties. The out-of-plane stiffness of this invention can be flexibly designed according to requirements, broadening its application range. Attached Figure Description

[0017] Figure 1 : Structural schematic diagram of Embodiment 1 of the present invention

[0018] Figure 2 Cross-sectional view of the structure of Embodiment 1 of the present invention

[0019] Figure 3 Schematic diagram of the first box-shaped long support in Embodiment 1 of the present invention

[0020] Figure 4 Schematic diagram of the second box-shaped long support in Embodiment 1 of the present invention

[0021] Figure 5 Schematic diagram of the box-shaped short support in Embodiment 1 of the present invention

[0022] Figure 6 Schematic diagram of the pre-embedded connector in Embodiment 1 of the present invention

[0023] Figure 7 Schematic diagram of the friction plate in Embodiment 1 of the present invention

[0024] Figure 8 Schematic diagram of the energy-consuming metal plate in Embodiment 1 of the present invention

[0025] Figure 9 Schematic diagram of the structure of embodiment 2 of the present invention

[0026] Figure 10 : Structural schematic diagram of Embodiment 3 of the present invention

[0027] Figure 11 : Structural schematic diagram of Embodiment 4 of the present invention

[0028] Figure 12 : Structural schematic diagram of Embodiment 5 of the present invention

[0029] 1-Energy-consuming metal plate, 2-Friction plate, 3-First box-shaped long support, 4-Second box-shaped long support, 5-Box-shaped short support, 6-Smooth surface, 7-Sensor, 8-High-strength bolt, 9-Nut, 10-Washer, 11-Embedded connecting steel plate, 12-Connecting anti-bending steel plate, 13-Threaded bolt hole, 14-Anchor, 15-Anti-shear stud, 16-Anti-bending stud, 17-Embedded I-beam. Detailed Implementation

[0030] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention.

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] Combination Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 8The damper in this embodiment includes an energy-dissipating metal plate 1, a friction plate 2, a first box-shaped long support 3, a second box-shaped long support 4, a box-shaped short support 5, a smooth surface 6, a sensor 7, a high-strength bolt 8, a nut 9, a washer 10, a pre-embedded connecting steel plate 11, a connecting bending-resistant steel plate 12, a threaded bolt hole 13, an anchor 14, a shear stud 15, a bending stud 16, and a pre-embedded I-beam 17. During assembly, sensor 7 is placed on the first box-shaped long support 3 and the second box-shaped long support 4. Depending on the requirements, it is determined whether the damper needs out-of-plane stiffness. If out-of-plane stiffness is required, the first box-shaped long support 3 and the second box-shaped long support 4 are installed on opposite sides of the plane. The first box-shaped long support 3 and the second box-shaped long support 4 are each fitted with a box-shaped short support 5 to form a clamping layer. The two clamping layers are respectively clamped on both sides of the energy-dissipating metal plate 1. A friction plate 2 is placed between the clamping layer and the energy-dissipating metal plate 1. Coaxial through holes are provided on the clamping layer, the energy-dissipating metal plate 1, and the friction plate 2. High-strength bolts 8 are used for fixing through the coaxial through holes. If out-of-plane stiffness is not required, the first box-shaped long support 3 and the second box-shaped long support 4 are installed on the same side of the opposite plane, and the clamping layer, the energy-dissipating metal plate 1, and the friction plate 2 are fixed using high-strength bolts 8. The contact surfaces of the first box-shaped long support 3, the second box-shaped long support 4, and the box-shaped short support 5 with the friction plate 2 are all treated with anti-slip material. The pre-embedded connectors are fixedly connected to the first box-shaped long support 3, the second box-shaped long support 4, and the box-shaped short support 5 by high-strength bolts 8. Then, shear studs 15 and bending studs 16 are installed on the pre-embedded I-beams 17 of the pre-embedded connectors. The pre-embedded I-beams 17 and the anchors 14 are then poured into the concrete together. After assembly, flexible filler material can be injected between the damper and the floor slab and the connecting beam to protect the damper from corrosion.

[0034] Example 2

[0035] Figure 9 This is a structural schematic diagram of this embodiment. In the shear wall structure, the damper is placed at the connecting beam of the shear wall. During an earthquake, the relative displacement of the two ends of the connecting beam drives the damper to work and dissipate energy. The pre-embedded connecting steel plates 11, anchors 14, shear studs 15, bending studs 16 and pre-embedded I-beams 17 at both ends of the damper are embedded in the shear wall and tightly bonded to the concrete. At the same time, a certain distance is left between the upper surface of the damper and the lower surface of the floor slab to prevent the damper from damaging the floor slab during an earthquake. In this structure, the first box-shaped long support 3 and the second box-shaped long support 4 of the damper can be installed on opposite sides of opposite planes or on the same side of opposite planes, depending on whether out-of-plane stiffness needs to be provided for the damper.

[0036] Example 3

[0037] Figure 10This is a structural schematic diagram of this embodiment. In the connecting beams of the shear wall structure, dampers are arranged layer by layer. The dampers are placed at the connecting beams between the shear walls, with a certain distance between the upper surface of the damper and the lower surface of the floor slab to prevent the damper from damaging the floor slab during an earthquake. Simultaneously, the first box-shaped long support 3 and the second box-shaped long support 4 in the damper are arranged on opposite sides and fixed with high-strength bolts 8, providing out-of-plane stiffness for the damper. The dampers in adjacent layers are symmetrically arranged, providing out-of-plane stiffness in different normal directions for adjacent layers, thereby providing out-of-plane stiffness for the shear walls of the overall structure.

[0038] Example 4

[0039] Figure 11 This is a structural schematic diagram of this embodiment. Multiple dampers are placed between the floors of the frame structure. The upper end of each damper is connected to the upper frame beam, and the lower end is connected to a concrete connecting support. The concrete connecting support is cast integrally with the lower frame beam. It is necessary to ensure that the concrete connecting support has sufficient load-bearing capacity and initial stiffness to prevent it from failing before the damper loses its performance. The first box-shaped long support 3 and the second box-shaped long support 4 in the damper can be installed on opposite sides of opposite planes or on the same side of opposite planes, depending on whether out-of-plane stiffness is required for the damper.

[0040] Example 5

[0041] Figure 12 This is a structural schematic diagram of this embodiment. The damper is placed between the floors of the frame structure. During an earthquake, the inter-story displacement drives the damper to work and dissipate energy. The upper end of the damper is connected to the upper-story frame beam, and the lower end is connected to a concrete connecting pier. The concrete connecting pier is cast integrally with the lower-story frame beam. It is necessary to ensure that the concrete connecting pier has sufficient bearing capacity and initial stiffness to prevent it from ceasing operation before the damper loses its performance. The first box-shaped long support 3 and the second box-shaped long support 4 of the damper are both arranged on opposite sides and fixed by high-strength bolts 8, providing out-of-plane stiffness for the damper. Simultaneously, the dampers in the same floor are symmetrically arranged to provide lateral stiffness to the frame structure.

Claims

1. An out-of-plane variable stiffness metal damper with seismic monitoring function, characterized in that, include: An energy-consuming metal plate (1), a first box-shaped long support (3), a second box-shaped long support (4), and a box-shaped short support (5). The first box-shaped long support (3) and the second box-shaped long support (4) each cooperate with a box-shaped short support (5) to form a clamping layer. The two clamping layers are respectively clamped on the two sides of the energy-consuming metal plate (1). A friction plate (2) is provided between the clamping layer and the energy-consuming metal plate (1). The clamping layer, the energy-consuming metal plate (1), and the friction plate (2) are provided with coaxial through holes, and high-strength bolts (8) are used for fixing. The embedded connector includes a fixedly connected bending steel plate (12) and a pre-embedded connecting steel plate (11), wherein the pre-embedded connecting steel plate (11) is fixedly connected to or forms a pre-embedded I-beam (17) on the side away from the energy-consuming metal plate (1). The first box-shaped long support (3), the second box-shaped long support (4), and the box-shaped short support (5) are provided with threaded bolt holes (13) on their frames. The threaded bolt holes (13) are coaxial with the pre-set through holes on the pre-embedded connectors and are fixed by high-strength bolts (8). Sensors (7) are provided on the first box-shaped long support (3) and / or the second box-shaped long support (4); The first box-shaped long support (3) is fitted with a high-strength bolt (8) from the inside out at a position close to the energy-consuming metal plate (1) without contacting it. The nut of the high-strength bolt (8) is placed between the first box-shaped long support (3) and the second box-shaped long support (4) to prevent the connection between the supports from being too tight and causing damage to the metal energy-consuming plate (1). The first box-shaped long support (3) and the second box-shaped long support (4) are installed on opposite sides of opposite planes, which provides out-of-plane stiffness for the damper; or the first box-shaped long support (3) and the second box-shaped long support (4) are installed on the same side of opposite planes, which does not provide out-of-plane stiffness for the damper. The shear force on the damper is borne by the pre-embedded connecting steel plate (11) and shear stud (15), and the bending moment on the damper is borne by the connecting bending steel plate (12), anchor (14) and bending stud (16).

2. The out-of-plane variable stiffness metal damper with seismic monitoring function according to claim 1, characterized in that, Sensors (7) are installed on both the first box-shaped long support (3) and the second box-shaped long support (4). The sensors (7) are used to collect, process and transmit damper deformation data, monitor the damper deformation, convert the data from electrical signals to digital signals and store them in the data collection, storage and evaluation device. The damper deformation is evaluated by the damper deformation limit set in the module. Finally, the damper deformation data is transmitted to the server through the wireless transmission module.

3. The out-of-plane variable stiffness metal damper with seismic monitoring function according to claim 1, characterized in that, The surface of the pre-embedded I-beam (17) is uniformly provided with shear studs (15) and bending studs (16).

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