A hierarchical multi-state dual-control energy dissipation node reinforcing device based on rubber, SMA and MRE

Abstract

This invention provides a graded, multi-state, dual-control energy-dissipating node reinforcement device based on rubber, SMA, and MRE, belonging to the field of building structure repair and reinforcement technology. It includes a reinforcement component installed at the beam-column junction, comprising a column-end fixing plate and a beam-end fixing plate. The column-end fixing plate is fixed to the vertical end of the beam-column, and the beam-end fixing plate is fixed to the horizontal end of the beam-column. An SMA rod is installed between the column-end fixing plate and the beam-end fixing plate, with a primary energy-dissipating component on the SMA rod and a secondary energy-dissipating component on the beam-end fixing plate. One end of the SMA rod is connected to the column-end fixing plate, and the other end is connected to the secondary energy-dissipating component. This invention achieves multi-state controlled energy dissipation through the synergistic operation of the superelasticity of SMA, rubber friction, and the variable stiffness characteristics of MRE. As the device enters the active control stage, it retains the passive energy dissipation method while adding new active energy-dissipating components.

Description

Technical Field

[0001] This utility model belongs to the field of building structure repair and reinforcement technology, specifically involving a graded multi-state dual-control energy-consuming node reinforcement device based on rubber, SMA and MRE. Background Technology

[0002] The beam-column joints in reinforced concrete frame structures are critical points for transmitting bending moments and shear forces, and their seismic performance directly affects the overall structural stability. Traditional reinforcement methods (such as external steel cladding or carbon fiber fabric) can improve joint stiffness, but they suffer from the following problems: Insufficient energy dissipation capacity: Rigid reinforcement easily leads to brittle failure of the joint, making it difficult to dissipate energy through plastic deformation; Limited adaptability: It is impossible to set up multi-stage energy dissipation mechanisms according to the load size, resulting in insufficient energy dissipation capacity when the load is too large, and excessive energy dissipation capacity when the load is too small.

[0003] In existing technologies, magnetorheological materials and shape memory alloys (SMAs) have been used for structural energy dissipation, but they are mostly limited to a single energy dissipation mode and it is difficult to meet the performance requirements of different deformation stages.

[0004] To address these issues, this invention proposes a graded, multi-state, dual-control energy-consuming node reinforcement device based on rubber, SMA, and MRE. Utility Model Content

[0005] To achieve the above objectives, this utility model provides a graded multi-state dual-control energy-consuming node reinforcement device based on rubber, SMA and MRE, including a reinforcement component set at the beam-column junction. The reinforcement component includes a column end fixing plate and a beam end fixing plate. The column end fixing plate is fixed to the vertical end of the beam-column, and the beam end fixing plate is fixed to the horizontal end of the beam-column.

[0006] An SMA rod is provided between the column end fixing plate and the beam end fixing plate. A primary energy-dissipating component is provided on the SMA rod, and a secondary energy-dissipating component is provided on the beam end fixing plate. One end of the SMA rod is connected to the column end fixing plate, and the other end of the SMA rod is connected to the secondary energy-dissipating component.

[0007] Furthermore, the primary energy-consuming component includes a rubber pad metal sleeve, which is sleeved on the SMA rod and fixed to the beam end fixing plate.

[0008] The portion of the SMA rod located inside the metal sleeve of the rubber pad layer is fixedly connected to a connecting rod. The metal sleeve of the rubber pad layer is provided with a plurality of rubber friction pads, which are distributed on both sides of the connecting rod. The rubber friction pads are sleeved on the SMA rod.

[0009] Furthermore, the SMA rod is composed of a first metal rod that is inclined from left to right and a second metal rod that is horizontally arranged;

[0010] The left end of the first metal rod is fixedly connected to the column end fixing plate, the right end of the first metal rod is fixedly connected to the left end of the second metal rod, and the right end of the second metal rod is connected to the secondary energy consumption component.

[0011] The right end of the first metal rod and the left end of the second metal rod are both located inside the metal sleeve of the rubber pad layer. The connecting rod is inserted through the first metal rod and is arranged perpendicular to the first metal rod. Several rubber friction pad layers are all sleeved on the first metal rod.

[0012] Furthermore, a rubber anti-slip plate is provided inside the metal sleeve of the rubber pad layer. The rubber anti-slip plate is located at the bottom of the plurality of rubber friction pad layers and is sleeved on the right end of the first metal rod.

[0013] Furthermore, the length of the first metal rod is 500 mm, and the length of the second metal rod is 150 mm;

[0014] The metal sleeve of the rubber pad is a hollow cylindrical sleeve, and the rubber friction pad is annular.

[0015] Furthermore, the secondary energy-consuming component includes an MRE container, which is located on the right side of the metal sleeve of the rubber pad layer and the two are fixedly connected. An MRE energy-consuming module is provided inside the MRE container, and a microcontroller is fixedly connected to the right side of the MRE container. The microcontroller is fixed to the beam end fixing plate.

[0016] It also includes a displacement sensor fixedly installed at the beam-column junction, and both the displacement sensor and the MRE energy consumption module are electrically connected to the single-chip microcomputer.

[0017] The right end of the second metal rod passes horizontally through the metal sleeve of the rubber pad layer and is inserted into the MRE container, and the right end of the second metal rod is connected to the MRE energy consumption module.

[0018] Furthermore, the MRE energy-consuming module is filled with MRE material, and the MRE energy-consuming module is equipped with an electromagnetic coil. The electromagnetic coil is equipped with a current controller, and both the electromagnetic coil and the current controller are electrically connected to the microcontroller.

[0019] Furthermore, a sliding support bearing is horizontally provided inside the metal sleeve of the rubber pad layer at the bottom of the second metal rod.

[0020] The advantages of this invention are: The reinforcement device improves the bending bearing capacity and stiffness of beam-column joints while dissipating seismic or wind-induced vibration energy through damping. Furthermore, the tiered energy dissipation design avoids excessive energy consumption during minor earthquakes and insufficient energy dissipation during major earthquakes. Simultaneously, the second-stage energy dissipation is actively controlled. By setting appropriate thresholds, without human intervention, it senses the relative displacement at the beam-column junction or the piezoelectric effect of the magnetorheological elastomer to increase the magnetic field strength of the MRE module, continuously improving the device's vibration reduction capability in high-intensity seismic zones.

[0021] The magnetorheological elastomer (MRE) of this invention has significant advantages in building vibration reduction. Its stiffness and damping can be adjusted in real time by an external magnetic field, and it can dynamically optimize the structural dynamic response during an earthquake. Compared with traditional vibration reduction devices, MRE does not require complex mechanical structures, has no wear on moving parts, and has high reliability and low maintenance costs. At the same time, it has wide bandwidth adaptability, taking into account both low-frequency large sway and high-frequency aftershock control. In addition, MRE has strong weather resistance and can work stably for a long time in extreme temperature or corrosive environments, providing buildings with an efficient and adaptive active vibration reduction solution.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a perspective view of the reinforcement device of this utility model.

[0024] Figure 2 This is the front view of the reinforcement device of this utility model.

[0025] Figure 3 This is a front view of the rubber pad metal sleeve of this utility model.

[0026] Figure 4 This is a top view of the rubber pad metal sleeve of this utility model.

[0027] Figure 5 This is a schematic diagram of the structure of the SMA rod of this utility model.

[0028] Figure 6 This is a schematic diagram of the column end fixing plate structure of this utility model.

[0029] Figure 7 This is a schematic diagram of the beam end fixing plate structure of this utility model.

[0030] Figure 8 This is a schematic diagram of the MRE module structure of this utility model.

[0031] Figure 9 This is a partial cross-sectional view of the metal sleeve of the rubber pad layer of this utility model.

[0032] Figure 10This is a cross-sectional view of the rubber pad layer metal sleeve structure of this utility model.

[0033] Explanation of reference numerals in the attached drawings: 1. Reinforcing component; 11. Column end fixing plate; 12. Beam end fixing plate; 13. SMA rod; 131. First metal rod; 132. Second metal rod; 2. Primary energy dissipation component; 21. Rubber pad metal sleeve; 22. Connecting rod; 23. Rubber friction pad; 24. Rubber anti-slip plate; 3. Secondary energy dissipation component; 31. MRE container; 32. MRE energy dissipation module; 321. Electromagnetic coil; 322. Current controller; 33. Microcontroller; 34. Displacement sensor; 35. Support bearing. Detailed Implementation

[0034] To further illustrate the technical means and effects of this utility model in achieving its intended purpose, the specific implementation methods, structural features and effects of this utility model are described in detail below with reference to the accompanying drawings and embodiments.

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0036] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "aligned", "overlapping", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0037] 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 one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0038] Example 1

[0039] This embodiment provides, for example Figures 1-10The device shown is a graded multi-state dual-control energy dissipation node reinforcement device based on rubber, SMA and MRE, including a reinforcement component 1 set at the beam-column junction. The reinforcement component 1 includes a column end fixing plate 11 and a beam end fixing plate 12. The column end fixing plate 11 is fixed to the vertical end of the beam and column, and the beam end fixing plate 12 is fixed to the horizontal end of the beam and column.

[0040] An SMA rod 13 is provided between the column end fixing plate 11 and the beam end fixing plate 12. A primary energy dissipation component 2 is provided on the SMA rod 13, and a secondary energy dissipation component 3 is provided on the beam end fixing plate 12. One end of the SMA rod 13 is connected to the column end fixing plate 11, and the other end of the SMA rod 13 is connected to the secondary energy dissipation component 3.

[0041] The first-level energy-consuming component 2 includes a rubber pad metal sleeve 21, which is sleeved on the SMA rod 13 and fixed to the beam end fixing plate 12.

[0042] The SMA rod 13 is fixedly connected to a connecting rod 22 within the rubber pad metal sleeve 21. The connecting rod 22 is a rectangular SMA rod. The rubber pad metal sleeve 21 contains several rubber friction pads 23, which are distributed on both sides of the connecting rod 22. The rubber friction pads 23 are fitted onto the SMA rod 13. A perforated plate that can only pass through the SMA rod 13 should be welded to one side of the beam end of the rubber pad metal sleeve 21 to limit the slippage of the rubber friction pads 23. The SMA rod 13 is connected to the fixed plate on the beam column through this rubber pad metal sleeve 21. The SMA rod 13 is a shape memory SMA rod 13, which consists of a first metal rod 131 that is inclined from left to right and a second metal rod 132 that is horizontally arranged. The length of the first metal rod 131 is 500mm and the length of the second metal rod 132 is 150mm.

[0043] The left end of the first metal rod 131 is fixedly connected to the column end fixing plate 11 by bolts, the right end of the first metal rod 131 is fixedly connected to the left end of the second metal rod 132, and the right end of the second metal rod 132 is connected to the secondary energy consumption component 3.

[0044] The right end of the first metal rod 131 and the left end of the second metal rod 132 are both located inside the rubber pad metal sleeve 21. A connecting rod 22 is inserted through the first metal rod 131, perpendicular to it. The connecting rod 22 is a 50mm × 50mm × 10mm cuboid. The rubber pad metal sleeve 21 is a hollow cylindrical sleeve. The rubber friction pad 23 is annular and is fitted and fixed inside the rubber pad metal sleeve 21. The cuboid should be located at 2 / 3 of the length of the SMA rod 132 to ensure the SMA... When the rod 13 is under pressure or tension, the passive energy dissipation system can be activated by compressing the corresponding rubber friction pad on one side. Several rubber friction pads 23 are all sleeved on the first metal rod 131. The contact surface between the connecting rod 22 on the first metal rod 131 and the rubber friction pad 23 is coated with lubricant to reduce frictional resistance. The lubricant can be molybdenum disulfide. The rubber pad metal sleeve 21 is provided with a rubber anti-slip plate 24. The rubber anti-slip plate 24 is located at the bottom of several rubber friction pads 23 and is sleeved at the right end of the first metal rod 131.

[0045] Furthermore, the secondary energy-consuming component 3 includes an MRE container 31, which is located on the right side of the rubber pad metal sleeve 21 and the two are fixedly connected. An MRE energy-consuming module 32 is installed inside the MRE container 31. The right end of the second metal rod 132 passes horizontally through the rubber pad metal sleeve 21 and is inserted into the MRE container 31, with the right end of the second metal rod 132 connected to the MRE energy-consuming module 32. The MRE container 31 is a magnetorheological elastomer container, a small quadrilateral iron container, welded... On the beam end fixing plate 12, and connected to the rubber pad metal sleeve 21, the end of the shape memory SMA rod 13 is bent, that is, the second metal rod 132 can pass horizontally through this container. The MRE energy consumption module 32 is a magnetorheological elastomer MRE energy consumption module 32. A single-chip microcomputer 33 is fixedly connected to the right side of the MRE container 31. The single-chip microcomputer 33 is fixed on the beam end fixing plate 12. After the device is installed, the corresponding threshold is set to ensure the dual-control start of the device.

[0046] It also includes a displacement sensor 34 fixedly installed at the beam-column junction. The displacement sensor 34 is set at the beam-column junction and connected to the MRE energy consumption module 32. When the deformation threshold is reached, the electromagnetic field of the MRE energy consumption module 32 is turned on. Both the displacement sensor 34 and the MRE energy consumption module 32 are electrically connected to the microcontroller 33.

[0047] Furthermore, the MRE energy-consuming module 32 is filled with MRE material, and the MRE energy-consuming module 32 is equipped with an electromagnetic coil 321. The electromagnetic coil 321 is equipped with a current controller 322. Both the electromagnetic coil 321 and the current controller 322 are electrically connected to the microcontroller 33.

[0048] The MRE energy dissipation module 32 is placed inside the MRE container 31. The MRE energy dissipation module 32 has an electromagnetic coil 321 inside and is filled with MRE material. It has a current controller 322 inside. The current controller 322 integrates a charge amplifier and a DQA system to detect deformation and adjust the stiffness by changing the strength of the current to guide the magnetic field. It also sets a corresponding start-up threshold and activates when the deformation threshold is reached.

[0049] Furthermore, a sliding support bearing 35 is horizontally provided inside the rubber pad metal sleeve 21 at the bottom of the second metal rod 132, and the sliding direction of the support bearing 35 is the same as the length direction of the second metal rod 132.

[0050] A graded, multi-state, dual-control energy-dissipating node reinforcement method based on rubber, SMA, and MRE includes the following steps:

[0051] S1: First, prepare an SMA rod 13 with a length of about 650mm. The SMA rod 13 is composed of a first metal rod 131 and a second metal rod 132. The first metal rod 131 is inclined and has a length of 500mm. The second metal rod 132 is horizontal and has a length of 150mm.

[0052] S2: Install column end fixing plate 11 and beam end fixing plate 12 on the beam and column, tighten the bolts on column end fixing plate 11 and beam end fixing plate 12 to the design preload, then fix the left end of the first metal rod 131 in SMA rod 13 to column end fixing plate 11, then insert the rubber pad metal sleeve 21 and embed the rubber friction pad 23, so that the entire SMA rod 13 passes through the rubber pad metal sleeve 21 and points to beam end fixing plate 12;

[0053] S3: Then weld and fix the rubber pad metal sleeve 21 to the beam end fixing plate 12, and place the annular rubber friction pad 23. The rubber friction pad 23 is distributed on both sides of the connecting rod 22, with one side set on the upper left side of the connecting rod 22 and the other side set on the lower right side of the connecting rod 22.

[0054] S4: Next, weld the MRE container 31 to the beam end fixing plate 12, and then install the MRE energy dissipation module 32. Weld the MRE container 31 onto the beam end fixing plate 12, and place the MRE energy dissipation module 32 and the microcontroller 33. Connect the power line of the electromagnetic coil 321 and the displacement sensor 34 to the microcontroller 33. Connect the MRE energy dissipation module 32 and the current controller 322 to the microcontroller 33. Build the circuit and debug the trigger threshold. Then, set the displacement sensor 34 at the beam-column junction to detect the piezoelectric effect or the relative displacement of the beam-column node. A support bearing 35 with a sliding contact surface is configured at the bottom of the second metal rod 132 to ensure that the SMA rod 13 acts on the MRE energy dissipation module 32 when strain occurs.

[0055] In use, firstly, an SMA rod 13 with a length of about 650 mm is prepared. The SMA rod 13 is composed of a first metal rod 131 and a second metal rod 132. The first metal rod 131 is inclined and has a length of 500 mm. The second metal rod 132 is horizontal and has a length of 150 mm.

[0056] Next, install column end fixing plate 11 and beam end fixing plate 12 on the beam and column, tighten the bolts on column end fixing plate 11 and beam end fixing plate 12 to the design preload, then fix the left end of the first metal rod 131 in SMA rod 13 to column end fixing plate 11, then insert the rubber pad metal sleeve 21 and embed the rubber friction pad 23, so that the entire SMA rod 13 passes through the rubber pad metal sleeve 21 and points to beam end fixing plate 12. The connecting rod 22 is a cuboid with dimensions of 50mm×50mm×10mm.

[0057] Then, the rubber pad metal sleeve 21 is welded and fixed to the beam end fixing plate 12, and a circular rubber friction pad 23 is placed there. The rubber friction pad 23 is distributed on both sides of the connecting rod 22, with one side on the upper left side of the connecting rod 22 and the other side on the lower right side of the connecting rod 22. The rubber pad metal sleeve 21 is a cylindrical sleeve with an inner diameter of 70mm, an outer diameter of 90mm, and a length of 200mm. The rubber friction pad 23 is a ring with an inner diameter of Φ50mm, an outer diameter of Φ70mm, and a thickness of 10mm. The rubber friction pad 23 is symmetrically arranged on both sides and contacts the connecting rod 22 on the SMA rod 13 to provide frictional energy dissipation.

[0058] Finally, the MRE container 31 is welded to the beam end fixing plate 12. The MRE container 31 is a small quadrilateral iron container with dimensions of 300mm × 150mm × 100mm and an adjustable magnetic field strength range of 0-1T. It is welded to the beam end fixing plate 12 and connected to the rubber pad metal sleeve 21. The horizontal section of the SMA rod 13, i.e., the second metal rod 132, passes horizontally through the container opening and overlaps with the MRE energy dissipation module 32. Then, the MRE energy dissipation module 32 is installed. The MRE energy dissipation module 32 contains an electromagnetic coil 321 and MRE material. The electromagnetic coil 321 has a wire diameter of Φ1mm and 500 turns. The MRE material is a carbonyl iron powder / silicone rubber composite. The material has a stiffness increased by 300% under a magnetic field. Next, an MRE container 31 is welded onto the beam end fixing plate 12, and an MRE energy dissipation module 32 and a microcontroller 33 are placed there. The power line of the electromagnetic coil 321 and the displacement sensor 34 are connected to the microcontroller 33. The MRE energy dissipation module 32 and the current controller 322 are also connected to the microcontroller 33. The circuit is built and the trigger threshold is adjusted. Then, a displacement sensor 34 is set at the beam-column junction to detect the piezoelectric effect or the relative displacement of the beam-column node. A support bearing 35 with a sliding contact surface is configured at the bottom of the second metal rod 132 to ensure that the SMA rod 13 acts on the MRE energy dissipation module 32 when strain occurs.

[0059] In addition, the displacement sensor 34, the microcontroller 33, and the current controller 322 form an adaptive triggering mechanism. The displacement sensor 34 is an LVDT displacement sensor with an accuracy of ±0.01mm. It is installed at the beam-column junction to monitor the deformation in real time. The current controller 322 is used to set the microcontroller 33 and connect it to the charge amplifier and the DQA system to detect deformation. It receives the sensor signal or outputs a PWM signal after sensing the deformation detected by the DQA system to control the on / off state of the electromagnetic coil 321 and the magnetic field strength.

[0060] The output signal of displacement sensor 34 is conditioned by an amplifier and then input to microcontroller 33 to set two-level trigger thresholds, as follows:

[0061] Level 1: 1.5% inter-story drift angle → switching on / off magnetic field of 0.3T;

[0062] Level 2: 2% inter-layer displacement angle → switching on / off 0.8T magnetic field;

[0063] Two-stage triggering conditions: During a high-intensity earthquake, displacement sensor 34 detects the angular displacement of the beam-column joints. When the deformation reaches 1.5% of the inter-story drift angle, the first-stage magnetic field (0.3T) is activated; when it reaches 2%, the second-stage magnetic field (0.8T) is activated. Alternatively, the piezoelectric effect of the magnetorheological elastomer is sensed, with a threshold of V. th =1.3kΔ, Δ = 0.025θ, k is the MRE piezoelectric sensitivity.

[0064] Two-stage energy consumption mechanism:

[0065] First stage of energy consumption (small deformation stage)

[0066] SMA hyperelastic deformation: When the node experiences ≤1% inter-story drift angle, the SMA rod 13 deforms under compression / tension, dissipating energy through reverse restoring force;

[0067] Rubber friction energy consumption: sliding friction between the SMA rod cuboid and the rubber friction pad layer 23 at the contact surface.

[0068] Second stage of energy consumption (large deformation stage)

[0069] MRE stiffness adjustment: When the displacement reaches 1.5%, the microcontroller 33 triggers the electromagnetic coil 321 to be energized, generating a 0.3T magnetic field to increase the MRE stiffness to 1.5 times the original value;

[0070] Synergistic energy dissipation: When the deformation continues to 2%, the magnetic field is enhanced to 0.8T, the MRE stiffness is increased to 3 times, and together with the SMA rod 13 and the rubber friction pad 23, it bears the load and dissipates energy.

[0071] High-intensity active control of energy consumption: As deformation continues to increase, charge amplifiers and DQA systems intervene to improve energy consumption efficiency through active control.

[0072] Material selection:

[0073] SMA rod: Ni-Ti alloy (phase transformation temperature 30℃, elastic modulus 80GPa);

[0074] Rubber friction pad 23: Silicone rubber (hardness 60HA, temperature resistance -50℃~200℃);

[0075] MRE material: Carbonyl iron powder / silicone rubber composite material (density 1.8 g / cm³) 3 (Shear modulus ≥ 500 kPa under magnetic field).

[0076] Process requirements:

[0077] Rubber friction pad 23 pretreatment: vulcanization treatment (temperature 150℃, pressure 10MPa, time 30min) to improve wear resistance;

[0078] Electromagnetic coil 321 insulation: The wire is wrapped with polyimide (PI) film and can withstand voltage ≥1000V.

[0079] In summary, this invention provides a graded, multi-state, dual-control energy-dissipating node reinforcement device based on rubber, SMA, and MRE. Through the synergistic operation of the hyperelasticity of SMA, the friction of rubber, and the variable stiffness characteristics of MRE, multi-state controlled energy dissipation is achieved. Furthermore, as the device enters the active control phase, while retaining the passive energy dissipation method, new active energy-dissipating components are added. This not only solves the problems of insufficient energy dissipation capacity, rigid reinforcement leading to brittle node failure, and difficulty in dissipating energy through plastic deformation, but also addresses the limited adaptability and inability to set multi-level energy dissipation mechanisms according to load size, resulting in insufficient energy dissipation capacity when the load is too large and excessive energy dissipation capacity when the load is too small. Simultaneously, it addresses the issue that while magnetorheological materials and shape memory alloys have been used for structural energy dissipation in the prior art, they are mostly limited to a single energy dissipation mode, making it difficult to meet the performance requirements of different deformation stages.

[0080] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A graded, multi-state, dual-control energy-dissipating node reinforcement device based on rubber, SMA, and MRE, characterized in that: The reinforcement component (1) is installed at the intersection of beam and column. The reinforcement component (1) includes a column end fixing plate (11) and a beam end fixing plate (12). The column end fixing plate (11) is fixed to the vertical end of the beam and column, and the beam end fixing plate (12) is fixed to the horizontal end of the beam and column. An SMA rod (13) is provided between the column end fixing plate (11) and the beam end fixing plate (12). A primary energy-consuming component (2) is provided on the SMA rod (13), and a secondary energy-consuming component (3) is provided on the beam end fixing plate (12). One end of the SMA rod (13) is connected to the column end fixing plate (11), and the other end of the SMA rod (13) is connected to the secondary energy-consuming component (3).

2. The graded multi-state dual-control energy-dissipating node reinforcement device based on rubber, SMA, and MRE as described in claim 1, characterized in that: The primary energy-consuming component (2) includes a rubber pad metal sleeve (21), which is sleeved on the SMA rod (13) and fixed on the beam end fixing plate (12). The SMA rod (13) located inside the rubber pad metal sleeve (21) is fixedly connected to a connecting rod (22). The rubber pad metal sleeve (21) is provided with a plurality of rubber friction pads (23). The plurality of rubber friction pads (23) are distributed on both sides of the connecting rod (22). The rubber friction pads (23) are sleeved on the SMA rod (13).

3. The graded multi-state dual-control energy-dissipating node reinforcement device based on rubber, SMA, and MRE as described in claim 2, characterized in that: The SMA rod (13) is composed of a first metal rod (131) that is inclined from left to right and a second metal rod (132) that is horizontally arranged; The left end of the first metal rod (131) is fixedly connected to the column end fixing plate (11), the right end of the first metal rod (131) is fixedly connected to the left end of the second metal rod (132), and the right end of the second metal rod (132) is connected to the secondary energy consumption component (3). The right end of the first metal rod (131) and the left end of the second metal rod (132) are both located inside the rubber pad metal sleeve (21). The connecting rod (22) is inserted through the first metal rod (131). The connecting rod (22) and the first metal rod (131) are arranged perpendicular to each other. Several rubber friction pads (23) are all sleeved on the first metal rod (131).

4. The graded multi-state dual-control energy-dissipating node reinforcement device based on rubber, SMA, and MRE as described in claim 3, characterized in that: The rubber pad metal sleeve (21) is provided with a rubber anti-slip plate (24), which is located at the bottom of the plurality of rubber friction pads (23) and is sleeved on the right end of the first metal rod (131).

5. The graded multi-state dual-control energy-dissipating node reinforcement device based on rubber, SMA, and MRE as described in claim 3, characterized in that: The first metal rod (131) has a length of 500 mm, and the second metal rod (132) has a length of 150 mm; The rubber pad metal sleeve (21) is a hollow cylindrical sleeve, and the rubber friction pad (23) is annular.

6. The graded multi-state dual-control energy-dissipating node reinforcement device based on rubber, SMA, and MRE as described in claim 3, characterized in that: The secondary energy-consuming component (3) includes an MRE container (31), which is located on the right side of the rubber pad metal sleeve (21) and the two are fixedly connected. An MRE energy-consuming module (32) is provided inside the MRE container (31). A microcontroller (33) is fixedly connected to the right side of the MRE container (31), and the microcontroller (33) is fixed on the beam end fixing plate (12). It also includes a displacement sensor (34) fixedly installed at the beam-column junction, and both the displacement sensor (34) and the MRE energy consumption module (32) are electrically connected to the microcontroller (33); The right end of the second metal rod (132) passes horizontally through the metal sleeve (21) of the rubber pad layer and is inserted into the MRE container (31), and the right end of the second metal rod (132) is connected to the MRE energy consumption module (32).

7. The graded multi-state dual-control energy-dissipating node reinforcement device based on rubber, SMA, and MRE as described in claim 6, characterized in that: The MRE energy-consuming module (32) is filled with MRE material, and the MRE energy-consuming module (32) is provided with an electromagnetic coil (321). The electromagnetic coil (321) is provided with a current controller (322). The electromagnetic coil (321) and the current controller (322) are both electrically connected to the microcontroller (33).

8. The graded multi-state dual-control energy-dissipating node reinforcement device based on rubber, SMA, and MRE as described in claim 6, characterized in that: The rubber pad metal sleeve (21) is provided with a horizontal sliding support bearing (35) located at the bottom of the second metal rod (132).

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