A truss structure system with a multi-dimensional, multi-graded composite energy dissipation and vibration reduction device

Abstract

This invention discloses a truss structure system with a multi-dimensional, multi-graded composite energy dissipation and vibration reduction device, belonging to the field of structural earthquake resistance, wind resistance, and vibration control. It includes high-strength metal plates, bending steel plates, cross-shaped metal bosses, cross-shaped steel pads, shear steel plates, long straight slotted steel plates, short straight slotted steel plates, friction plates, hard washers, spring washers, high-strength bolts, nuts, upper beams, lower beams, trusses, and truss steel pads. The device is installed at the nodes of the truss structure system. Under normal small-amplitude excitation, the multi-dimensional, multi-graded composite energy dissipation and vibration reduction device does not function, and the truss structure nodes are the same as those of traditional truss structures. When the truss structure undergoes lateral displacement under earthquake or strong wind loads, the composite vibration reduction device at the nodes begins to function. When significant in-plane and out-of-plane bending moments and shear forces occur, they are absorbed and dissipated through the bending damper and shear damper components.

Description

Technical Field

[0001] This invention relates to a truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device. By fully dissipating energy through the composite energy dissipation and vibration reduction device arranged in the truss structure, the adverse effects of vibration on the truss structure under external excitations such as earthquakes, wind loads, and traffic loads can be reduced, effectively reducing the dynamic response of the structure. It belongs to the field of seismic and wind resistance and vibration reduction control of civil engineering structures. Background Technology

[0002] In truss structural systems, trusses typically refer to truss beams, a type of latticed beam structure. Truss structures are commonly used in engineering structures such as large-span factories, exhibition halls, stadiums, and bridges. With the widespread promotion of steel structures in China, and due to the prefabricated, cost-effective, and efficient characteristics of truss structural systems, they have received significant attention and application in the civil engineering industry. However, under external loads, the inter-joint chords are the main stress-bearing and energy-dissipating parts of the truss, making the diagonal web members prone to yielding, buckling, and even failure. Therefore, the ductility and energy dissipation performance of trusses under seismic loading are generally poor, requiring improvement.

[0003] The basic principle of vibration reduction design is to extend the natural period of a structure by increasing its damping ratio or reducing its natural frequency, thereby effectively isolating seismic forces and reducing its ability to transmit vibrations, thus protecting the main structure from damage. Currently, common vibration reduction devices include friction vibration dampers, viscous energy dissipation vibration dampers, metal energy dissipation vibration dampers, and tuned vibration dampers. Among these, friction energy dissipators are a type of energy-dissipating vibration reduction device related to displacement. Their working principle involves fixing the components and friction plates with bolt preload. When the horizontal force on the energy dissipator exceeds the sliding friction force, sliding occurs between the components, achieving frictional energy dissipation and thus mitigating seismic forces. Due to its good vibration reduction effect, simple construction, clear mechanical model, wide applicability, convenient maintenance, and low cost, it has become the most widely used passive energy-dissipating vibration reduction device. Besides frictional energy dissipation, adding bending and shear damping devices is also an effective way to dissipate energy.

[0004] Currently used vibration damping devices are subject to numerous limitations in terms of size, arrangement, assembly, and energy dissipation direction. This often prevents the placement of damping devices within the limited space at truss structure nodes, and also hinders the simultaneous addressing of in-plane and out-of-plane energy dissipation. Therefore, for truss structures, traditional dampers are typically used as supports or large components placed between truss members or nodes. This severely impacts the functionality and aesthetics of truss structures, limiting the widespread adoption and application of traditional vibration damping devices in truss systems. Therefore, developing a multi-dimensional, multi-graded composite energy dissipation and vibration damping device for truss structure nodes is of paramount importance. Summary of the Invention

[0005] To address this problem, this invention proposes a multi-dimensional, multi-graded composite energy dissipation and vibration reduction device based on the principles of friction energy dissipation and bending and shear resistance.

[0006] This composite energy dissipation and vibration reduction device mainly consists of three parts: a friction damper, a bending damper, and a shear damper. The friction damper dissipates energy through sliding friction of friction plates, while the bending and shear dampers dissipate energy through in-plane and out-of-plane bending and shear steel plates, respectively. Furthermore, the materials, sizes, and quantities of the friction plates, bending and shear steel plates are replaceable, thus achieving multi-dimensional and multi-stage energy dissipation and vibration reduction.

[0007] Under normal, small-amplitude excitation, the multi-dimensional, multi-graded composite energy dissipation and vibration reduction device does not function, and the truss structure nodes are the same as those of a traditional truss structure. When the truss structure undergoes lateral displacement under earthquake or strong wind loads, the composite vibration reduction device at the nodes begins to function. First, the friction damping device takes effect, causing relative sliding between the inner surface of the channel-shaped metal plate at the energy dissipation node and the friction plate. Due to the preload applied by the bolts, the friction plate dissipates vibration energy through sliding between the friction plates. Simultaneously, the coefficient of friction only affects the initial sliding force and the bearing capacity during the sliding phase; a higher coefficient of friction results in a higher bearing capacity, but has little impact on the ultimate bearing capacity and ductility of the structure. The coefficient of friction can be changed by altering the material of the friction plate, allowing for the assembly of friction plates of different materials according to engineering needs. When significant in-plane and out-of-plane bending moments and shear forces occur, these are borne by the bending damper and shear damper components. The load-bearing capacity of the bending damper and shear damper can also be changed by replacing the steel plate material, thereby adapting to the seismic requirements of the project.

[0008] The multi-dimensional, multi-level composite energy dissipation and vibration reduction device boasts advantages such as simple construction, low cost, small footprint, close integration with the structural body, diverse vibration reduction directions, and assemblability. Under seismic and wind loads, it can withstand lateral forces, as well as in-plane and out-of-plane bending moments and shear forces. Installed at truss nodes, it effectively dissipates energy while also leveraging the lateral resistance performance of traditional trusses. Compared to ordinary trusses, the multi-dimensional, multi-level composite energy dissipation and vibration reduction truss structure significantly improves the ductility and energy dissipation capacity of the structure in all force directions, preventing premature buckling of web members that would lead to a sharp decrease in lateral stiffness and bearing capacity, thus preventing the structure from exhibiting ductile stress. Furthermore, the device can preset the sliding friction force by adjusting the preload of the friction energy dissipator and replacing the friction plates with different materials, making it suitable for different seismic intensity requirements in various regions. Different steel plates can be installed to alter the device's in-plane and out-of-plane bending and shear resistance. This invention can promote the widespread application of truss structure systems in high-intensity seismic zones.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device is provided. The system consists of a high-strength metal plate 1, a bending steel plate 2, a cross-shaped metal boss 3, a cross-shaped steel pad 4, a shear steel plate 5, a long straight slotted steel plate 6, a short straight slotted steel plate 7, a friction plate 8, a hard washer 9, a spring washer 10, a high-strength bolt 11, a nut 12, an upper beam 13, a lower beam 14, a truss 15, and a truss steel pad 16.

[0011] The friction damper section of the multi-dimensional, multi-graded composite energy dissipation and vibration reduction device consists of a long straight grooved steel plate 6, a short straight grooved steel plate 7, a friction plate 8, a hard washer 9, a spring washer 10, a high-strength bolt 11, and a nut 12. These components are assembled in the order of spring washer 10, hard washer 9, long straight grooved steel plate 6, friction plate 8, and short straight grooved steel plate 7, using high-strength bolts 11 and nuts 12. The bending damper section is composed of a bending-resistant steel plate 2 welded to a high-strength metal plate 1. The shear damper section is assembled in the order of high-strength metal plate 1, cross-shaped metal boss 3, cross-shaped steel pad 4, and shear-resistant steel plate 5. The bending damper and shear damper sections are assembled together with the upper beam 13, lower beam 14, and truss 15 using the high-strength bolts of the friction damper, working together to form a multi-dimensional, multi-graded composite energy dissipation and vibration reduction device.

[0012] The high-strength metal plate 1 can be made of Q345 steel (elastic modulus approximately 210–220 GPa) to prevent the friction damper from being crushed by the high-strength bolts during displacement. The length of the high-strength metal plate 1 is an integer multiple (at least 3 times) of the length of the long straight slotted steel plate 6, and the width is the same as the beam width and an integer multiple (at least 3 times) of the width of the short straight slotted steel plate 7. This allows for better adjustment of the number of long straight slotted steel plates 6 and short straight slotted steel plates 7, based on the actual structural requirements.

[0013] In the friction damper section, the long straight grooved steel plate 6 and the short straight grooved steel plate 7 can be made of Q235 steel (elastic modulus approximately 200–210 GPa) or Q345 steel (elastic modulus approximately 210–220 GPa). The long straight grooved steel plate 6 is approximately 200 mm–300 mm long, and its width is equal to the diameter of the arcs at both ends, approximately 30 mm–50 mm. The short straight grooved steel plate 7 is 1 / 2 to 2 / 3 the length of the long straight grooved steel plate 6, and its width is equal to that of the long straight grooved steel plate 6. The friction plate 8 can be made of aluminum-magnesium alloy (friction coefficient with steel approximately 0.3–0.6), copper-zinc alloy (friction coefficient with steel approximately 0.3–0.6), or asbestos-free organic material (friction coefficient with steel approximately 0.2–0.5), etc. Under the same environmental and preload conditions, the frictional forces, from largest to smallest, are aluminum-magnesium alloy, copper-zinc alloy, and asbestos-free organic materials. Different types of friction plates can be combined according to the seismic requirements of the project. The thickness of the friction plate 8 can be 3mm to 6mm, and its diameter should be equal to the arc diameter on both sides of the long straight groove steel plate 6 and the short straight groove steel plate 7. This can make full use of the friction area and achieve better energy dissipation. After the friction damper is assembled, it is connected to the upper beam 13 and the high-strength metal plate 1 by applying a certain preload with high-strength bolts (model M10×60, elastic modulus of about 200GPa). This allows the long straight groove steel plate 6 and the short straight groove steel plate 7 to generate friction when they drive the friction plate to move, thus reducing vibration and dissipating energy.

[0014] The connection length between the bending steel plate 2 and the high-strength metal plate 1 is 1 / 4 to 1 / 3 of the length of the high-strength metal plate 1, and the height is the vertical distance between the top and bottom surfaces of the high-strength metal plate 1. The contact length between the shear steel plate 5 and the cross-shaped steel pad is 150mm to 200mm, and the height is 1 / 3 to 1 / 2 of the vertical distance between the top and bottom surfaces of the high-strength metal plate 1. Both the bending steel plate 2 and the shear steel plate 5 are installed in both in-plane and out-of-plane directions. The thickness, material, and quantity of the bending steel plate 2 and the shear steel plate 5 in each direction can be adjusted according to the actual structural requirements. The outer steel can be Q345 steel or Q235 steel, and the inner steel can be low yield point steel (yield strength not higher than 160MPa, elastic modulus approximately 205 to 215GPa). Each layer is 10mm to 30mm thick to ensure effective energy dissipation both in-plane and out-of-plane during strong winds or earthquakes.

[0015] The high-strength metal plate 1 is parallel to the top and bottom, with a vertical distance equal to the height of the bending steel plate 2, ranging from 250mm to 400mm. The cross-shaped metal boss 3 and the cross-shaped steel pad 4 are made of Q235 steel. The long side of the cross-shaped steel pad 4 is 2.2 to 2.5 times the length of the shear steel plate 5 and has the same width as the high-strength metal plate 1. The short side is 1.2 to 1.5 times the length of the shear steel plate 5. The width in both directions is an integer multiple, at least 4 times, of the thickness of the bending steel plate 2, and the thickness is 10mm to 30mm. The height of the cross-shaped metal boss 3 is 1 / 4 to 1 / 3 of the height of the bending steel plate 2, and its dimensions are equal to those of the cross-shaped steel pad 4. The sum of the heights of the upper and lower cross-shaped metal bosses 3 and cross-shaped steel pads 4 with the shear steel plate 5 should be equal to the height of the bending steel plate 2.

[0016] Truss 15 is connected to high-strength metal plate 1 by bolts of type M10×40 through truss steel pad 16. The cross-sectional area of ​​the two trusses 15 should be smaller than the area of ​​truss steel pad 16 to prevent exceeding the size of the steel pad, thereby achieving a better connection effect.

[0017] The multi-dimensional, multi-graded composite energy dissipation and vibration reduction device is assembled in the factory in the following order: First, the shear damper section is assembled. Two cross-shaped metal bosses 3 are welded to the upper and lower high-strength metal plates 1, respectively, and installed at the center of the high-strength metal plates 1. The in-plane and out-of-plane shear steel plates 5 are welded to the upper and lower cross-shaped steel pads 4, and then the cross-shaped steel pads 4 are welded to the cross-shaped metal bosses 3 of the same size to form a whole. Next, the bending damper section is assembled. The bending steel plates 2, which bear in-plane and out-of-plane bending moments, are symmetrically arranged on both sides of the high-strength metal plate 1 and welded together to complete the assembly of the bending damper section. The shear damper section and the bending damper section form a whole. The friction damper can be assembled simultaneously with the two parts mentioned above, using high-strength bolts 11 and nuts 12 in the order of spring washer 10, hard washer 9, long straight groove steel plate 6, friction plate 8, and short straight groove steel plate 7 to form a single friction damper, and then the quantity can be increased according to project requirements.

[0018] The entire system should be installed according to the following construction sequence: Prefabricate multi-dimensional, multi-graded composite energy dissipation and vibration reduction devices in the factory. Upon arrival at the site, connect one end to the beam via high-strength bolts 11 in the friction damping device, and the other end to the truss 15 via bolts on the truss steel pad 16. Install these devices at the nodes of the truss structure system, achieving modular assembly. After a minor earthquake, if only the sliding friction energy dissipation of the friction damper is damaged, simply remove the high-strength bolts 11 between the friction damper and the beam and install a new friction damper. After a major earthquake, if the entire energy dissipation and vibration reduction node is damaged due to insufficient energy dissipation, remove the high-strength bolts 11 between the friction damper and the beam, as well as the bolt connections between the truss steel pad 16 and the truss 15, and install a newly prefabricated composite energy dissipation and vibration reduction device. This method is convenient, quick, and can be installed at intervals as needed.

[0019] The present invention has the following advantages due to the adoption of the above technical solutions:

[0020] 1. The truss structure system of the present invention has a multi-dimensional, multi-level composite energy dissipation and vibration reduction device. The vibration reduction device is arranged at the nodes between the truss and the beam. It can be disassembled and installed in the project, realizing the assembly process, which is quick and convenient, saving workload and working time.

[0021] 2. The truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device in this invention can achieve graded vibration reduction. When lateral displacement occurs under seismic action, energy dissipation and vibration reduction can be achieved first through the friction damping device. When significant in-plane and out-of-plane bending moments and shear forces occur, they are borne by the bending damper and shear damper, and work together with the friction damper to exert vibration reduction effect.

[0022] 3. The truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device in this invention can withstand not only lateral forces, but also significant in-plane and out-of-plane bending moments and shear forces, thereby achieving multi-dimensional energy dissipation and vibration reduction.

[0023] 4. The truss structure system with a multi-dimensional, multi-graded composite energy dissipation and vibration reduction device in this invention can control the friction coefficient by controlling the number of straight groove steel plates in the friction damper section, the material of the friction plates, and the material and quantity of the bending steel plate and the shear steel plate, so as to meet the seismic requirements of different projects and make this invention applicable to areas with different seismic fortification intensities. Attached Figure Description

[0024] Figure 1 It is a three-dimensional rendering of the nodes of a multi-dimensional, multi-level composite energy dissipation and vibration reduction device.

[0025] Figure 2 A schematic diagram of the connection of a single friction damping device.

[0026] Figure 3 Schematic diagram of the overall friction damping device.

[0027] Figure 4 Front view of the overall friction damping device.

[0028] Figure 5 Top view of the overall friction damping device.

[0029] Figure 6 Schematic diagram of the bending resistance device.

[0030] Figure 7 Front view of the bending resistance device.

[0031] Figure 8 Side view of the bending resistance device.

[0032] Figure 9 Schematic diagram of shear-resistant device.

[0033] Figure 10 Front view of the shear-resistant device.

[0034] Figure 11 Side view of the shear-resistant device.

[0035] Figure 12 This is a connection diagram of the nodes and beams of a multi-dimensional, multi-graded composite energy dissipation and vibration reduction device. Figure 13 Diagram showing the connection between the truss and the truss steel pad.

[0036] Figure 14 A three-dimensional rendering of a truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device in this invention.

[0037] Figure 15 A front view of a truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device in this invention.

[0038] Figure 16 A top view of a truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device in this invention.

[0039] Figure 17 A side view of a truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device in this invention.

[0040] In the diagram: 1—High-strength metal plate, 2—Bending steel plate, 3—Cross-shaped metal boss, 4—Cross-shaped steel pad, 5—Shear-resistant steel plate, 6—Long straight groove steel plate, 7—Short straight groove steel plate, 8—Friction pad, 9—Hard washer, 10—Spring washer, 11—High-strength bolt, 12—Nut, 13—Upper beam, 14—Lower beam, 15—Truss, 16—Truss steel pad Detailed Implementation

[0041] Example 1:

[0042] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0043] like Figure 1 and Figure 14 The image shows an embodiment of a truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device according to the present invention. It mainly includes a high-strength metal plate 1, a bending steel plate 2, a cross-shaped metal boss 3, a cross-shaped steel pad 4, a shear steel plate 5, a long straight groove steel plate 6, a short straight groove steel plate 7, a friction plate 8, a hard washer 9, a spring washer 10, a high-strength bolt 11, a nut 12, an upper beam 13, a lower beam 14, a truss 15, and a truss steel pad 16.

[0044] The specific implementation steps are as follows:

[0045] 1. Conduct vibration reduction design for a section of truss structure system. The overall structural system consists of beams, composite energy dissipation and vibration reduction devices, and trusses, with bolts used for connection at the joints.

[0046] 2. The high-strength metal plate in the composite energy dissipation and vibration reduction device has a size of 780mm×480mm, and its width is consistent with the beam width, which facilitates better connection.

[0047] 3. In the friction damper section, the dimensions of the long straight groove steel plate are 260mm×30mm×5mm, and the dimensions of the short straight groove steel plate are 160mm×30mm×5mm. The diameter of the arc on both sides is 30mm. The diameters of the spring washer, hard washer, and friction plate are 16mm, 24mm, and 30mm respectively, and the thickness of each is 3mm. 。 The friction pads can be made of aluminum-magnesium alloy, copper-zinc alloy, or asbestos-free organic materials. After the friction damper is assembled, it is connected to the upper beam and high-strength metal plate by applying a certain preload with high-strength bolts. This allows the straight-groove steel plate to drive the friction pads, generating friction to reduce vibration and dissipate energy.

[0048] 4. The bending-resistant steel plate is composed of three layers of steel plates, each 10mm thick. The outer steel plate is made of Q345 steel, and the middle plate is made of LY160 steel. Using different steel materials reduces its bending stiffness, allowing it to fully utilize its energy dissipation capacity. The dimensions of the connection between each layer of bending-resistant steel plate and the high-strength metal plate are 100mm × 10mm, with a height of 320mm. The connection is made by welding and is placed on both sides of the composite energy dissipation and vibration reduction device. The number of steel plates can be increased or decreased according to project needs to meet regional seismic requirements.

[0049] 5. The shear-resistant steel plate is composed of three layers of steel plates, each 10mm thick. The outer layer is made of Q345 steel, and the middle layer is made of LY160 steel. Using different steel materials reduces its shear stiffness, allowing it to fully utilize its energy dissipation capacity. The shear-resistant steel plate and the cross-shaped steel pad are integrated. The long side of the cross-shaped steel pad is 480mm, the short side is 220mm, the width is 50mm, and the thickness is 20mm. The connection between each layer of shear-resistant steel plate and the cross-shaped steel pad measures 170mm × 10mm and has a height of 120mm. Shear resistance is achieved by adding a 100mm high metal boss to the cross-shaped plate and welding it to the high-strength metal plate.

[0050] 6. After the entire composite energy dissipation and vibration reduction device is arranged, it is connected to the truss with high-strength bolts. The composite energy dissipation and vibration reduction device can be arranged at intervals at nodes to optimize the structure.

[0051] 7. After a minor earthquake, if only the sliding friction energy dissipation of the friction damper is damaged, it is only necessary to remove the high-strength bolts between the friction damper and the beam and install a new friction damper. After a major earthquake, if the entire energy dissipation and vibration reduction node is damaged due to insufficient energy dissipation, it is necessary to remove the high-strength bolts between the friction damper and the beam, as well as the bolt connections between the truss steel pad and the truss, and install a new prefabricated composite energy dissipation and vibration reduction device.

[0052] The above is a typical embodiment of the present invention, but the implementation of the present invention is not limited thereto.

Claims

1. A truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device, characterized in that: It consists of three parts: the friction damper, the shear damper, and the bending damper. The friction damper consists of a long straight grooved steel plate (6), a short straight grooved steel plate (7), a friction plate (8), a hard washer (9), a spring washer (10), a high-strength bolt (11), and a nut (12); it is assembled in the order of spring washer (10), hard washer (9), long straight grooved steel plate (6), friction plate (8), and short straight grooved steel plate (7) using high-strength bolts (11) and nuts (12); The shear damper consists of a high-strength metal plate (1), a cross-shaped metal boss (3), a cross-shaped steel pad (4), and a shear-resistant steel plate (5). The cross-shaped metal boss (3) and the cross-shaped steel pad (4) have the same length and width but different thicknesses. The shear-resistant steel plates (5) are arranged in the plane and out of the plane respectively. The required number of shear-resistant steel plates (5) in the plane and out of the plane according to different projects are attached together and placed in the corresponding positions in the middle of the upper and lower cross-shaped steel pads (4) in the plane and out of the plane respectively. The contact points are fully welded together. The upper and lower cross-shaped metal bosses (3) are welded to the middle of the upper and lower high-strength metal plates (1) respectively. Then the part formed by the shear-resistant steel plate (5) and the upper and lower cross-shaped steel pads (4) is attached to the upper and lower cross-shaped metal bosses (3) and fully welded. The bending damper consists of a bending steel plate (2) and a high-strength metal plate (1). The bending steel plates (5) are arranged in the plane and out of the plane respectively. The number of bending steel plates (5) required in the plane and out of the plane according to different projects are attached together and symmetrically arranged on both sides of the high-strength metal plate (1) that is parallel to the top and bottom. The contact points are fully welded together. Both the bending damper and the shear damper are welded together on the same pair of parallel high-strength metal plates (1) to form a whole. They are then assembled together with the upper beam (13), lower beam (14) and truss (15) by high-strength bolts of the friction damper. The truss (15) is bolted to the high-strength metal plate (1) through the truss steel pad (16). The cross-sectional area of ​​the two trusses (15) is smaller than that of the truss steel pad (16).

2. The truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device according to claim 1, characterized in that: The high-strength metal plate (1) is made of high-strength steel; its length is an integer multiple of the long straight groove steel plate (6), and its width is the same as the beam width and an integer multiple of the short straight groove steel plate (7), thereby increasing or decreasing the number of long straight groove steel plates (6) and short straight groove steel plates (7).

3. The truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device according to claim 1, characterized in that: In the friction damper section, the long straight groove steel plate (6) is 200~300mm long and its width is equal to the diameter of the arc at both ends; the short straight groove steel plate (7) is 1 / 2~2 / 3 the length of the long straight groove steel plate (6) and its width is equal to that of the long straight groove steel plate (6); the friction plate (8) is made of aluminum-magnesium alloy, copper-zinc alloy, and asbestos-free organic matter. The diameter of the friction plate (8) is the same as the diameter of the arc on both sides of the long straight groove steel plate (6) and the short straight groove steel plate (7), and the friction area is used to dissipate energy; after the friction damper section is assembled, a certain pre-tightening force is applied by high-strength bolts to connect it to the upper beam (13) and the high-strength metal plate (1), so that when the long straight groove steel plate (6) and the short straight groove steel plate (7) drive the friction plate to move, friction force is generated to reduce vibration and dissipate energy.

4. The truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device according to claim 1, characterized in that: The bending steel plate (2) and the shear steel plate (5) are both set in the in-plane and out-of-plane directions. The thickness, material and quantity of the bending steel plate (2) and the shear steel plate (5) in each direction can be adjusted according to the actual structural requirements to ensure that effective energy dissipation can occur in the in-plane and out-of-plane directions during wind or earthquakes.

5. A truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device according to claim 1, characterized in that: The high-strength metal plate (1) is parallel to the top and bottom, and the vertical distance is the height of the bending steel plate (2); the long side of the cross-shaped steel pad (4) is 2.2 to 2.5 times the length of the shear steel plate (5) and is the same as the width of the high-strength metal plate (1), and the short side is 1.2 to 1.5 times the length of the shear steel plate (5). The width in both directions is an integer multiple of the thickness of the bending steel plate (2); the height of the cross-shaped metal boss (3) is 1 / 4 to 1 / 3 of the height of the bending steel plate (2), and the size is equal to that of the cross-shaped steel pad (4); the sum of the heights of the upper and lower cross-shaped metal bosses (3), the cross-shaped steel pad (4), and the shear steel plate (5) should be equal to the height of the bending steel plate (2).

6. The truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device according to claim 1, characterized in that: The multi-dimensional, multi-level composite energy dissipation and vibration reduction device is assembled in the factory in the following order: First, the shear damper part is assembled, and two cross-shaped metal bosses (3) are welded to the upper and lower high-strength metal plates (1) respectively, and installed at the center of the high-strength metal plate (1); the shear steel plates (5) in the plane and out of the plane are welded together with the upper and lower cross-shaped steel pads (4), and then the cross-shaped steel pads (4) are welded to the cross-shaped metal bosses (3) of the same size to form a whole; then the bending damper part is assembled, and the shear damper part is assembled, which bears the in-plane The bending steel plate (2) with out-of-plane bending moment is symmetrically arranged on both sides of the high-strength metal plate (1) and welded together to complete the assembly of the bending damper part; the shear damper part and the bending damper part form a whole; the friction damper part is carried out at the same time as the above two parts, and is assembled in the order of spring washer (10), hard washer (9), long straight groove steel plate (6), friction plate (8), and short straight groove steel plate (7) through high-strength bolts (11) and nuts (12) to form a single friction damper, and then the quantity is added according to the engineering requirements.

7. A truss structure system with a multi-dimensional, multi-level composite energy dissipation and vibration reduction device according to claim 1, characterized in that: The installation is carried out in the following construction sequence: a multi-dimensional multi-grade composite energy dissipation and vibration reduction device is prefabricated in the factory. After arriving at the site, one end is connected to the beam through the high-strength bolt (11) in the friction damping device, and the other end is bolted to the truss (15) through the truss steel pad (16). The device is then installed to the node of the truss structure system to achieve assembly. After experiencing a minor earthquake, if only the sliding friction energy dissipation of the friction damper is damaged, the high-strength bolts (11) between the friction damper and the beam need to be removed and a new friction damper needs to be installed. After experiencing a major earthquake, if the entire energy dissipation and vibration reduction node is damaged due to insufficient energy dissipation, the high-strength bolts (11) between the friction damper and the beam, as well as the bolt connections between the truss steel pad (16) and the truss (15) need to be removed and a new prefabricated composite energy dissipation and vibration reduction device needs to be installed at intervals according to actual needs.

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