An assembled composite damping self-resetting support capable of realizing output protection

Abstract

The application provides an assembled composite damping self-resetting support capable of realizing output protection, which is composed of multiple independent modules through external pipe connectors, and comprises a speed-sensitive damping module, a displacement-sensitive damping module, a reset module and an output protection module. The modules are connected through bolts, which greatly reduces the initial defects and the adverse effects of welding stress. The assembly can be independently processed and transported to the construction site for integrated assembly, which greatly improves the production construction efficiency and is convenient for post-earthquake repair. The damping energy dissipation module of the component is composed of the displacement-sensitive damping module and the speed-sensitive damping module. The displacement-sensitive damping module is composed of a metal yield energy dissipation module or a friction energy dissipation module, and the speed-sensitive damping module is composed of a viscoelastic damping module or a viscous damping module, which ensures that the component can effectively reduce the acceleration response of the structure while providing stable energy dissipation.

Description

Technical Field

[0001] This invention relates to the field of seismic technology in buildings, specifically to a prefabricated composite damping self-resetting support that can achieve output protection. Background Technology

[0002] Earthquakes are among the most destructive natural disasters in the world, often causing structural damage and even collapse. Residual deformation is a crucial indicator for evaluating a structure's seismic performance and toughness. Significant residual deformation after an earthquake drastically increases the cost of repair and reinforcement, sometimes exceeding the cost of demolition and reconstruction. While widely used conventional steel braces and buckling-restrained braces can improve the lateral stiffness of building structures and reduce vibration response, they still exhibit significant residual deformation after an earthquake. Therefore, self-centering braces have emerged to effectively reduce residual deformation and improve seismic performance. Currently, researchers both domestically and internationally have developed various types of self-centering braces.

[0003] Self-centering braces generally consist of a main support structure, a reset device, an energy dissipation device, and auxiliary components. The main support structure, primarily composed of ordinary steel, provides initial stiffness. The reset device provides restoring force to reduce or even eliminate residual deformation. The energy dissipation device provides energy dissipation capacity to reduce seismic response and protect the structure. Auxiliary components ensure the various parts of the support work together as a unified whole. The function of a self-centering brace mainly relies on the reset device and the energy dissipation device. Currently, existing self-centering braces commonly use prestressed tendons, steel strands, shape memory alloys, and disc springs to provide the reset force. Prestressed tendons are economical and simple in principle, while disc springs offer versatile combinations and high load-bearing capacity; both are widely used. Regarding energy dissipation devices, frictional energy dissipation and metal yield energy dissipation are favored by many scholars due to their simple principles and stable energy dissipation; both belong to displacement-sensitive damping. Furthermore, due to their good control over structural acceleration, more and more scholars have adopted velocity-sensitive damping as energy dissipation devices in recent years, including viscous damping and viscoelastic damping. Regardless of the type of reset device and energy dissipation device used, self-resetting supports can reduce residual structural deformation and improve seismic resistance.

[0004] The closest existing technology to this invention is a damping energy-dissipating support that utilizes the rheological properties of magnetorheological fluid to dissipate energy and a disc spring to provide the restoring force. The restoring device of this scheme mainly consists of a guide shaft, a combined disc spring, a disc spring end plate, and an inner tube, respectively positioned at both ends. When the inner tube and the guide shaft move relative to each other, the combined disc spring is compressed by the disc spring end plate to provide the restoring force. The energy dissipation system of this scheme mainly consists of a cylindrical cylinder, magnetorheological fluid, a permanent magnet, a piston, a sealing plate, and an inner tube. When the inner tube and the guide shaft move relative to each other, the pressure difference at both ends of the piston must overcome the shear yield stress of the magnetorheological fluid solidified by the magnetic field, causing the magnetorheological fluid on one side of the cylinder to flow to the other side through the damping channel, thereby generating a damping force on the piston and dissipating the seismic input energy. This energy dissipation system possesses both displacement-sensitive and velocity-sensitive damping characteristics, and is also a type of composite damping self-restoring support. However, its high cost, difficulty in adjusting hysteresis performance, low degree of assembly, and inability to control output force make it difficult to achieve large-scale application.

[0005] Although there are various types of self-resetting supports available today, they still generally have the following problems:

[0006] 1. Most existing self-resetting supports are manufactured by welding, which results in a lot of residual welding stress and initial defects. They have poor stability under dynamic loads, increasing the risk of damage and failure to work.

[0007] 2. Most existing self-resetting supports are manufactured as a whole, and the components need to be assembled during the manufacturing process. This results in high transportation and installation costs for large supports, reducing production and construction efficiency.

[0008] 3. Most existing self-resetting supports do not take into account the secondary modification or reinforcement of the building structure, making it difficult to adjust the relevant design parameters according to new needs or only able to change a small part, thus reducing the applicability of the supports.

[0009] 4. Most existing self-setting braces employ either displacement-sensitive or velocity-sensitive damping. While braces using only displacement-sensitive damping possess stable energy dissipation capabilities, they exhibit poorer control over the story acceleration response compared to buckling-restrained braces under the same load-bearing capacity, increasing the probability of damage to non-structural components. Existing research indicates that velocity-sensitive damping offers better control over the story acceleration response, but the damping force it provides is typically lower than that of displacement-sensitive damping.

[0010] 5. Most existing self-resetting supports do not take into account the coordination between the support and the structure during the design. In order to obtain better energy dissipation or reset capacity, their bearing capacity is often designed to be relatively large. However, the structural node domain connected to the support is difficult to withstand large control forces under mega-earthquakes, resulting in local damage and failure.

[0011] To overcome the shortcomings of existing technologies, the present invention aims to provide a prefabricated composite damping self-resetting brace capable of providing output protection. This brace fully utilizes the energy dissipation capacity of displacement-sensitive damping and the superior structural acceleration control capability of velocity-sensitive damping, dissipating more seismic energy and meeting the energy dissipation requirements under earthquakes of varying intensities. Furthermore, the brace is assembled from multiple functional modules connected by bolts, avoiding initial defects and residual stresses caused by welding, thus improving stability and service life. The modules can be manufactured simultaneously and transported to the site for installation, improving production and construction efficiency. During normal use, the prefabricated design also simplifies maintenance, repair, and replacement. Each module is independent; by adjusting the design parameters of relevant modules, the brace's activated stiffness, activation force, ultimate bearing capacity, reset capacity, and energy dissipation capacity can be easily adjusted after assembly, facilitating secondary modifications or reinforcement of the building structure. In addition, a support protection module is set in the support, which provides a preset maximum output force by applying a pre-tightening force to the friction plate. Once the axial force exceeds the preset limit, it will slip, ensuring that the control force applied to the main structure will not cause local damage to the beam-column joint area. Summary of the Invention

[0012] To address the shortcomings of existing technologies, this invention provides a prefabricated composite damping self-resetting support capable of output protection. It is assembled from multiple independent modules connected by an outer tube connector, including a velocity-sensitive damping module, a displacement-sensitive damping module, a reset module, and an output protection module. The velocity-sensitive damping module can be either a viscous damping module or a viscoelastic damping module, and the displacement-sensitive damping energy dissipation module can be either a friction energy dissipation module or a metal yield energy dissipation module.

[0013] The outer tube connector includes an outer tube, a connecting flange, and a cavity. Flanges are provided at both ends, and reserved bolt holes for connecting other module outer tubes or cylinders are evenly arranged along the circumference of the flanges.

[0014] The viscous damping module includes a cylinder, a piston rod, a piston, a cavity, a damping medium, and a connecting flange. The piston divides the sealed cavity formed by the cylinder and the piston rod into two parts. The cavity is filled with high-viscosity silicone oil as a damping medium. The diameter of the piston is slightly smaller than that of the cylinder to form a gap for the damping medium to flow. Both ends of the piston rod and the cylinder are provided with connecting flanges. The flanges have reserved bolt holes for connecting adjacent modules or external pipe connectors evenly arranged along the circumference.

[0015] The viscoelastic damping module includes an outer tube, an inner tube, viscoelastic material, and connecting flanges. Grooves with dimensions matching the length and width of the viscoelastic material are formed on the surfaces of both the inner and outer tubes to fix its position. The viscoelastic material is bonded to the inner and outer tubes through a vulcanization process. When the inner and outer tubes move relative to each other, the viscoelastic material provides elastic restoring force and damping force. Connecting flanges with bolt holes are provided at both ends of the inner and outer tubes for connection to other modules.

[0016] The friction energy dissipation module includes an outer tube, an inner tube, a connecting flange, a friction core, friction plates, high-strength bolts, and gaskets. The friction core, connected to the inner tube, has shallow rectangular grooves on both its inner and outer surfaces. The groove on the outer surface is used to hold the friction plate, whose length and width dimensions match the groove, but its thickness is slightly greater than the groove depth. The protruding surface of the friction plate contacts the outer tube. The groove on the inner surface is used to hold the gasket to prevent damage to the friction core. Two rows of through grooves are formed along the movement direction of the inner and outer tubes on the friction plates, friction core, and gaskets. Several bolt holes, evenly distributed along the grooves, are formed at corresponding positions on the outer tube. The outer tube and gaskets are clamped together by high-strength bolts, and friction is generated through the mutual movement of the friction plates and the outer tube. Connecting flanges with pre-drilled bolt holes are provided at one end of the inner tube and both ends of the outer tube.

[0017] The metal yielding energy dissipation module includes an outer tube, an inner tube, a triangular steel plate, high-strength bolts, and connecting flanges. The triangular steel plate has several uniformly spaced circular holes along both its long and short sides. The inner and outer tubes have raised grooves with several circular holes on both sides at the same positions as the triangular steel plate, allowing the triangular steel plate to be connected to the inner and outer tubes as a whole using bolts. When the inner and outer tubes move relative to each other, the yielding of the entire cross-section of the triangular steel plate generates damping force, thus dissipating energy. Connecting flanges are provided on the inner and outer tubes for connection with other modules.

[0018] The reset module includes an outer tube, an inner tube, an inner tube disc spring end plate stop block, an outer tube disc spring end plate stop block, a disc spring assembly, and a disc spring end plate. Both ends of the inner and outer tubes are equipped with connecting flanges for connection to the speed-sensitive damping module and the displacement-sensitive damping module. The disc spring end plates are located at both ends of the disc spring assembly, adjacent to the inner tube stop block and the outer tube stop block. Applying preload to the disc spring end plates tightly presses the disc spring assembly, providing considerable restoring force for support.

[0019] The output protection module and the friction energy dissipation module have the same structure and working principle, but differ in assembly method. During assembly, only the outer tube of the output protection module needs to be connected to the adjacent module; the inner tube does not need to be connected.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The prefabricated composite damping self-resetting support of the present invention, which can realize output protection, mainly uses bolt connection and supplements it with a small amount of welding process, which greatly reduces the impact of initial defects and welding stress caused by welding.

[0022] 2. This invention employs multiple sub-assemblies that are processed and assembled separately, and then connected by bolts to form a unified support structure. This not only improves production and construction efficiency, but also allows for the timely replacement of severely damaged modules during post-earthquake repair, thereby reducing repair costs and shortening repair time.

[0023] 3. The self-resetting function of this invention is achieved using pre-compressed disc springs. By using different combinations of disc springs, the stroke can be freely configured and the activation stiffness can be controlled to a large extent according to design requirements. Traditional self-resetting support and reset materials, such as prestressed tendons, have limited deformation capacity and insufficient prestress loss. Although shape memory alloys have good elasticity and hysteresis properties, their performance is significantly affected by temperature and their cost is high. The disc springs used in this invention have a better reset effect.

[0024] 4. This invention employs a composite damping energy dissipation module composed of displacement-sensitive and velocity-sensitive damping modules, avoiding problems such as a single energy source, insufficient energy dissipation capacity, high cost of composite energy dissipation materials, and difficulty in processing and manufacturing. Using viscoelastic or viscous damping modules enhances the velocity-related energy dissipation capacity of the support, effectively reducing the acceleration response of the structure; however, the provided damping force is relatively small. By adjusting the metal yield module or friction energy dissipation module, a greater damping force can be provided to the component, achieving a simultaneous improvement in the overall load-bearing capacity and energy dissipation capacity of the support.

[0025] 5. This invention adjusts the initial stiffness, activated stiffness, activation force, damping force, and ultimate bearing capacity of a component by adjusting parameters such as the stiffness of the disc spring, preload, preload of high-strength bolts, number of triangular steel plates, shear area of ​​viscoelastic material, and damping coefficient of damping medium.

[0026] 6. The output protection module used in this invention protects the support and even the main structure. A preload is applied to the friction plate to provide a preset output force. Once the axial force on the support exceeds the preset limit, slippage occurs, ensuring that the control force applied to the main structure does not cause localized damage to the beam-column joint area. Attached Figure Description

[0027] The present invention includes the following figures:

[0028] Figure 1 This is a schematic diagram of an assembled composite damping self-resetting support that can achieve output protection.

[0029] Figure 2 A schematic diagram of the outer tube connector of a prefabricated composite damping self-resetting support that can achieve output protection;

[0030] Figure 3 A cross-sectional schematic diagram of a viscous damping module of a prefabricated composite damping self-resetting support that can achieve output protection;

[0031] Figure 4 A schematic diagram of the components of a viscoelastic damping module for a prefabricated composite damping self-resetting support that can achieve output protection.

[0032] Figure 5 This is a schematic diagram of the components of a prefabricated composite damping self-resetting support for achieving output protection, including a friction energy dissipation module and an output protection module.

[0033] Figure 6 A schematic diagram of a metal yield energy dissipation module for a prefabricated composite damping self-resetting support that can achieve output protection.

[0034] Figure 7 This is a cross-sectional schematic diagram of the reset module of a prefabricated composite damping self-resetting support that can achieve output protection.

[0035] Figure 8 This is a schematic cross-sectional view of a prefabricated composite damping self-resetting support that can achieve output protection.

[0036] Figure reference numerals: 1-1—Outer tube; 1-2—Cavity; 2-1—Connecting flange; 2-2—Cylinder body; 2-3—Piston; 2-4—Damping medium; 2-5—Piston rod; 2-6—Cavity; 3-1—Outer tube; 3-2—Inner tube; 3-3—Viscoelastic material; 3-4—Connecting flange; 4-1—Outer tube; 4-2—Connecting flange; 4-3—Inner tube; 4-4—Friction pad; 4-5—Friction core; 4- 6—Gasket; 4-7—High-strength bolt; 5-1—Outer tube; 5-2—Inner tube; 5-3—Outer tube groove; 5-4—Inner tube groove; 5-5—Triangular steel plate; 5-6—High-strength bolt; 5-7—Connecting flange; 6-1—Outer tube; 6-2—Inner tube; 6-3—Inner tube disc spring end plate stop; 6-4—Outer tube disc spring end plate stop; 6-5—Disc spring end plate; 6-6—Disc spring assembly; 6-7—Connecting flange. Detailed Implementation

[0037] To make the objectives, advantages, and features of the present invention more apparent, the following description is provided in conjunction with the appendix. Figure 1-8 The present invention will be further described in detail below with reference to specific embodiments.

[0038] This invention is mainly assembled from multiple functionally different and independent modules via external tube connectors, such as... Figure 1As shown, the system mainly includes a velocity-sensitive damping module and a displacement-sensitive damping module for energy dissipation, a reset module for resetting, and a force protection module for controlling the output force of the support. The velocity-sensitive damping module can be selected as a viscous damping module or a viscoelastic damping module, depending on the requirements; the displacement-sensitive damping module can be selected as a friction energy dissipation module or a metal yield energy dissipation module, depending on the requirements. Several modules and external tube connectors can be processed and manufactured simultaneously, and then assembled into a support assembly using bolts. The specific embodiments of the invention are described in detail below.

[0039] like Figure 2 As shown, the outer tube connector is a hollow cylindrical structure. Both ends of the outer tube 1-1 can be connected to other modules via bolts, and the outer tube cavity 1-2 provides space for connecting the inner tubes of each module. The entire outer tube connector is made of steel.

[0040] like Figure 3 As shown, the cylinder 2-2 and piston rod 2-5 in the viscous damping module are both hollow cylindrical structures. A disc-shaped piston 2-3 is located in the middle of the piston rod 2-5. The piston 2-3 divides the enclosed space formed by the cylinder 2-2 and piston rod 2-5 into two cavities 2-6. The diameter of the piston 2-3 is slightly smaller than the inner diameter of the cylinder 2-2, forming a small gap. A highly viscous damping medium 2-4 is filled in the cavity 2-6, which flows back and forth in the gap to generate damping force. Connecting flanges 2-1 with pre-drilled bolt holes are provided at both ends of the piston rod 2-5 for easy connection to other modules. The connecting flanges 2-1, cylinder 2-2, piston 2-3, and piston rod 2-5 are all made of steel, and the damping medium 2-4 is made of highly viscous silicone oil.

[0041] like Figure 4 As shown, both the outer tube 3-1 and the inner tube 3-2 in the viscoelastic damper are hollow rectangular steel tubes. Grooves, matching the length of the viscoelastic material, are formed on the surfaces of both the outer tube 3-1 and the inner tube 3-2. During assembly, the viscoelastic material 3-3 is first bonded to the groove in the inner tube 3-2 using a vulcanization process. The same method is then used to bond it to the groove in the outer tube 3-1. The viscoelastic material 3-3 is made of isoprene rubber, while the remaining components are made of steel.

[0042] like Figure 5As shown, the outer tube 4-1 of the friction energy dissipation module is a hollow rectangular steel tube structure, and its two ends can be connected to the outer tube connector via bolts. The inner tube 4-3 is a cylindrical structure, which directly connects to two friction cores 4-5. Both the inner and outer surfaces of the friction cores 4-5 have rectangular shallow grooves of the same size. The friction plates 4-4 and the gaskets 4-6 have the same length and width as the shallow grooves. Two rows of through grooves are formed on the friction plates 4-4, friction cores 4-5, and gaskets 4-6 along the movement direction of the inner and outer tubes. Several bolt holes are evenly distributed along the grooves at corresponding positions on the outer tube 4-1. The friction plates 4-4 are made of asbestos-free organic friction material, and the remaining components are made of steel. During assembly, first place the friction plate 4-4 and the gasket 4-6 into the corresponding grooves of the friction core 4-5, and then place them in the outer tube 4-1. During this process, pay attention to aligning the relative positions of the bolt holes and the through grooves. Then, use high-strength bolts 4-7 to pass through the bolt holes and through grooves to fix and clamp the friction core 4-5 and the friction plate 4-4. At this point, the friction energy dissipation module is assembled.

[0043] like Figure 6 As shown, the outer tube 5-1 of the metal yield energy dissipation module is a hollow rectangular square steel tube structure, and the inner tube 5-2 is a solid rectangular square steel tube structure. The triangular steel plate 5-5 has several uniformly spaced circular holes along its long and short sides. The outer tube surface and the inner tube surface have several circular holes on both sides at the same positions as the triangular steel plate, forming outer tube grooves 5-3 and inner tube grooves 5-4. Both ends of the outer tube 5-1 and the inner tube 5-2 are equipped with perforated connecting flanges 5-7. The triangular steel plate 5-5 is made of mild steel with a yield strength of 235 MPa, while the other components are made of steel with a yield strength of 355 MPa. During assembly, the triangular steel plate 5-5 is first placed between the two inner tube grooves 5-4, ensuring the perforation positions are aligned with the groove perforation positions. High-strength bolts 5-6 are then used to secure the triangular steel plate through the bolt holes and through the grooves. The same method is used to connect the triangular steel plate and the outer tube.

[0044] like Figure 7 As shown, the outer tube 6-1 and inner tube 6-2 in the reset module are both hollow round steel tube structures. A disc spring assembly 6-6 is sleeved on the inner tube 6-2. Disc spring end plates 6-5 are respectively set at both ends of the disc spring assembly 6-6. An outer tube disc spring end plate stop 6-4 is fixedly set on the outer end plate of the outer tube 6-1, and an inner tube disc spring end plate stop 6-3 is fixedly set on the inner tube 6-2, which is the outer end plate of the disc spring end plate 6-5. Connecting flanges 6-7 are provided at both ends of the outer tube 6-1 and the inner tube 6-2 to connect with the speed-sensitive damping module and the displacement-sensitive damping module.

[0045] After the outer pipe connectors and all modules have been processed and assembled, the overall support structure can be assembled. Figure 8The assembly process of this invention will be described using a support as an example. This support uses a viscous damping module and a friction energy dissipation module for energy dissipation. First, the piston rod or inner tube connecting flange (2-1 or 3-4) of the viscous damping module or viscoelastic damping module is aligned and connected to the inner tube connecting flange 6-7 of the reset module using bolts. Then, the cylinder 2-2 of the viscous damping module or the outer tube 3-1 of the viscoelastic damping module is connected to the outer tube 6-1 of the reset module using an outer tube connector to ensure the continuity of force transmission in the outer tube. Afterwards, the inner tube connecting flange 6-7 at the free end of the reset module is aligned and connected to the inner tube connecting flange (4-2 or 5-7) of the friction energy dissipation module or metal yield energy dissipation module using bolts. Then, the free end of the outer tube 6-1 of the reset module is connected to the outer tube (4-1 or 5-1) of the friction energy dissipation module or metal yield energy dissipation module using an outer tube connector. Finally, connect one outer tube connector to the free end of the outer tube (4-1 or 5-1) of the friction energy dissipation module or the metal yield energy dissipation module, and then connect the outer tube 4-1 of another friction energy dissipation module to the free end of the outer tube 1-1 of the outer tube connector. It is worth noting that this friction energy dissipation module is used as an output protection module, and its inner tube does not need to be connected to the inner tube of other modules.

[0046] by Figure 8 The working principle of this invention can be illustrated by the following example:

[0047] For ease of explanation, the right end of the outer tube 4-1 of the output protection module in the default support is fixed, while the left end of the piston rod 2-5 of the viscous damping module or the left end of the inner tube 3-2 of the viscoelastic damping module moves.

[0048] When the support is under tension, the left end of the piston rod 2-5 of the viscous damping module or the left end of the inner tube 3-2 of the viscoelastic damping module moves to the left. At this time, the inner tube disc spring end plate stop 6-3 at the right end of the inner tube of the reset module presses the right disc spring end plate 6-5, causing it to further press the disc spring assembly 6-6. Due to the blocking effect of the stop 6-4 on the outer tube 6-1 at the left end of the reset module, the disc spring assembly 6-6 is compressed and deformed, increasing the restoring force provided, and transmitting this force to the outer tube 6-1. At this time, as the piston 2-3 in the viscous damping module moves with the piston rod 2-5, it further compresses the damping medium 2-4 in the cavity 2-6, causing it to flow in the gap and generate damping force. This damping force will also act on the cylinder 2-2. If a viscoelastic damping module is used, the relative movement of the outer tube 3-1 and inner tube 3-2 of the viscoelastic damping module causes the viscoelastic material 3-3 to deform and provide damping force. Meanwhile, in the friction energy dissipation module, the friction core 4-5 moves to the left under the drive of the inner tube 4-3. Due to the clamping effect of the high-strength bolt 4-7, the friction plate 4-4 and the outer tube 4-1 will generate a certain damping force during contact movement, and this damping force will also be transmitted to the outer tube 4-1. If a metal yield energy dissipation module is used, then under the relative movement of the outer tube 5-1 and the inner tube 5-2, the upper and lower sides of the triangular steel plate 5-5 will deform differently, and the entire cross-section of the triangular steel plate 5-5 will yield, generating a damping force. It is worth noting that due to the presence of the outer tube connector, the force in each module cylinder or outer tube will be transmitted to the outer tube 4-1 supporting the right end output protection module. This module provides a preset maximum output force by applying a preload to the friction plate 4-4. Once the force in the outer tube 4-1 exceeds the preset limit, it will slip, ensuring that the control force applied to the main structure will not cause local damage to the beam-column joint area.

[0049] When the support is compressed, the left end of the piston rod 2-5 of the viscous damping module or the left end of the inner tube 3-2 of the viscoelastic damping module moves to the right. At this time, the inner tube disc spring end plate stop 6-3 at the left end of the inner tube of the reset module presses the left disc spring end plate 6-5, causing it to further press the disc spring assembly 6-6. Due to the blocking effect of the stop 6-4 on the outer tube 6-1 at the right end of the reset module, the disc spring assembly 6-6 is compressed and deformed, increasing the restoring force provided, and transmitting this force to the outer tube 6-1. At this time, as the piston 2-3 in the viscous damping module moves with the piston rod 2-5, it further compresses the damping medium 2-4 in the cavity 2-6, causing it to flow in the gap and generate damping force. This damping force also acts on the cylinder 2-2. If a viscoelastic damping module is used, the relative movement of the outer tube 3-1 and inner tube 3-2 of the viscoelastic damping module causes the viscoelastic material 3-3 to deform and provide damping force. Meanwhile, in the friction energy dissipation module, the friction core 4-5 moves to the left under the drive of the inner tube 4-3. Due to the clamping effect of the high-strength bolt 4-7, the friction plate 4-4 and the outer tube 4-1 will generate a certain damping force during contact movement, and this damping force will also be transmitted to the outer tube 4-1. If a metal yield energy dissipation module is used, then under the relative movement of the outer tube 5-1 and the inner tube 5-2, the upper and lower sides of the triangular steel plate 5-5 will deform differently, and the entire cross-section of the triangular steel plate 5-5 will yield, generating a damping force. It is worth noting that due to the presence of the outer tube connector, the force in each module cylinder or outer tube will be transmitted to the outer tube 4-1 supporting the right end output protection module. This module provides a preset maximum output force by applying a preload to the friction plate 4-4. Once the force in the outer tube 4-1 exceeds the preset limit, it will slip, ensuring that the control force applied to the main structure will not cause local damage to the beam-column joint area.

[0050] Regardless of whether it is under compression or tension, when the axial force of the support is lower than the activation force, the disc spring assembly 6-6 is in an inactive state. The total stiffness of the support is mainly affected by the series stiffness of the inner and outer tubes of each module. The stiffness at this stage is the initial stiffness. When the axial force of the support is higher than the activation force, the disc spring assembly 6-6 is in an active state. The inner and outer tubes of the energy dissipation module move relative to each other. The total stiffness of the support is affected by the design parameters of the disc spring assembly 6-6, the viscoelastic material 3-3, and the triangular steel plate 5-5. The stiffness at this stage is the stiffness after activation.

[0051] Specifically, the activation force can be set based on the disc spring preload in the reset module and the initial damping force provided by the damping energy dissipation module. During the loading process of the self-resetting support, when the reset module and the damping energy dissipation module are activated, and the initial stiffness becomes the activated stiffness, the axial force of the support is the activation force. When the axial force of the self-resetting support is lower than the activation force, the support is in an inactive state, and the stiffness of the support at this time is the initial stiffness, which is the series stiffness of the inner and outer tubes of each module. When the axial force of the self-resetting support is higher than the activation force, the support is in an active state, and the stiffness of the support at this time is the activated stiffness, which is the series-parallel composite stiffness provided by the inner and outer tubes, the reset module, and the damping energy dissipation module.

[0052] In the damping energy dissipation module, the viscous damping module and the frictional energy dissipation module do not provide stiffness, while the viscoelastic damping module and the metal yield energy dissipation module can provide a certain stiffness for the support. The stiffness calculation formula is as follows:

[0053]

[0054]

[0055]

[0056] In the formula: K1 is the initial stiffness of the support; K2 is the stiffness of the support after activation; K re For the stiffness of the disc spring in the reset module; K ve G is the stiffness of the viscoelastic damping module; n is the number of shear planes of the viscoelastic material; G' is the stored shear modulus of the viscoelastic material; A is the area of ​​the shear planes of the viscoelastic material; h is the thickness of each layer of viscoelastic material; K m denoted as σt, where σt is the stiffness of the metal yield energy dissipation module; N is the number of triangular steel plates; E is the elastic modulus of the steel; B is the width of the triangular steel plate; t is the thickness of the triangular steel plate; and H is the height of the triangular steel plate.

[0057] As a preferred embodiment of this solution, the friction pads in this invention are selected from, but are not limited to, asbestos-free organic materials or brass, and can be made from suitable friction materials among rubber-based, paper-based, resin-based, carbon fiber, and semi-metallic materials.

[0058] As a preferred option of this solution, the metal yield damping module is not limited to using triangular mild steel plates, but can use other metal yield damping module construction forms such as X-shaped steel plates, E-shaped steel plates, and S-shaped steel plates.

[0059] As a preferred option of this solution, the size, quantity, placement and angle of each damper, connection method with the reset module, and connection method with the external pipe system can be changed according to the design requirements of the damping force.

[0060] As a preferred option in this solution, the disc spring can be made of, but is not limited to, 60Si2MnA and 50CrVA materials.

[0061] As a preferred option in this scheme, the damping energy dissipation module can be, but is not limited to, displacement-sensitive damping modules such as metal yield damping modules and friction damping modules, and velocity-sensitive damping modules such as viscoelastic damping modules and viscous damping modules.

[0062] As a preferred embodiment of this solution, the dimensions of the grooves in the inner and outer tubes of the viscoelastic damping module are slightly larger than the dimensions of the viscoelastic material, ensuring that the viscoelastic material will not touch the grooves when sliding, thus ensuring the normal energy dissipation of the viscoelastic material.

[0063] As a preferred option for this scheme, viscoelastic damping materials can be selected, but are not limited to, high-attenuation rubber-based materials and rubber asphalt-based materials.

[0064] The above embodiments are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art can make various changes and modifications without departing from the essence and scope of this invention. Therefore, all equivalent technical solutions also fall within the scope of this invention, and the patent protection scope of this invention should be defined by the claims. Content not described in detail in this specification is prior art known to those skilled in the art.

Claims

1. A prefabricated composite damping self-resetting support capable of output protection, characterized in that... In the present application, The system is assembled from multiple independent modules connected by an outer tube connector. The modules are arranged sequentially as a first damping energy dissipation module, a reset module, a second damping energy dissipation module, and a power output protection module. The first and second damping energy dissipation modules are composed of a composite structure. Each of the first, reset, and second damping energy dissipation modules includes an outer tube and an inner tube. During self-resetting support operation, the outer and inner tubes of the first, reset, and second damping energy dissipation modules undergo relative movement. The output protection module includes an outer tube and an inner tube. When the axial force of the support exceeds a preset limit, the outer tube and the inner tube of the output protection module move relative to each other. The first damping energy dissipation module is a displacement-sensitive damping module; the second damping energy dissipation module is a velocity-sensitive damping module; wherein, the velocity-sensitive damping module is one of a viscous damping module and a viscoelastic damping module, and the displacement-sensitive damping module is one of a friction energy dissipation module and a metal yield energy dissipation module; The friction energy dissipation module includes an outer tube, an inner tube, a connecting flange, a friction core, friction plates, high-strength bolts, and gaskets. The friction core, connected to the inner tube, has a shallow rectangular groove on both its inner and outer surfaces. The groove on the outer surface is used to place the friction plate, whose length and width dimensions are the same as the groove, but its thickness is slightly greater than the groove depth. The protruding surface of the friction plate is in contact with the outer tube. The groove on the inner surface of the friction core is used to place the gasket. Two rows of through grooves are formed on the friction plates, friction core, and gaskets along the movement direction of the inner and outer tubes. Several bolt holes are evenly distributed along the grooves at corresponding positions on the outer tube. The outer tube and gaskets are clamped together by high-strength bolts to secure the friction core and friction plates. Connecting flanges with pre-drilled bolt holes are provided at one end of the inner tube and both ends of the outer tube. The output protection module and the friction energy dissipation module have the same structure; during assembly, the outer tube of the output protection module is connected to the adjacent module, but the inner tube is not connected.

2. The assembled composite damping self-resetting support capable of output protection as described in claim 1, characterized in that, The outer tube connector includes an outer tube, a connecting flange, and a cavity; each end of the outer tube connector is provided with a flange, and the flanges are evenly arranged with reserved bolt holes for connecting the outer tubes of other modules or cylinders along the circumference; the cavity provides space for connecting the inner tubes of each module.

3. The assembled composite dampened self-centering bracing with force protection of claim 1, wherein, The viscous damping module includes a cylinder, a piston rod, a piston, a cavity, a damping medium, and a connecting flange. The piston divides the sealed cavity formed by the cylinder and the piston rod into two parts. The cavity is filled with high-viscosity silicone oil as a damping medium. The diameter of the piston is slightly smaller than that of the cylinder to create a gap for the damping medium to flow. Both ends of the piston rod and the cylinder are provided with connecting flanges. The flanges have reserved bolt holes for connecting adjacent modules or external pipe connectors evenly arranged along the circumference.

4. The assembled composite dampened self-centering bracing with force protection of claim 1, wherein, The viscoelastic damping module includes an outer tube, an inner tube, viscoelastic material, and connecting flanges. Grooves with the same length and width as the viscoelastic material are opened on the surfaces of both the inner and outer tubes to fix the position of the viscoelastic material. The viscoelastic material is bonded to the inner and outer tubes through a vulcanization process. When the inner and outer tubes move relative to each other, the viscoelastic material can provide elastic restoring force and damping force. Connecting flanges with bolt holes are provided at both ends of the inner and outer tubes to connect with other modules.

5. The precast composite dampened self-centering support with force protection of claim 1, wherein, The metal yielding energy dissipation module includes an outer tube, an inner tube, a triangular steel plate, high-strength bolts, and connecting flanges. The triangular steel plate has several uniformly spaced circular holes along its long and short sides. The inner and outer tubes have several circular hole grooves on both sides at the same positions as the triangular steel plate, which can connect the triangular steel plate to the inner and outer tubes as a whole by bolts. When the inner and outer tubes move relative to each other, damping force is generated by the yielding of the entire cross section of the triangular steel plate. Connecting flanges are provided on the inner and outer tubes to connect with other modules.

6. The precast composite dampened self-centering support with force protection of claim 1, wherein, The reset module includes an outer tube, an inner tube, an inner tube disc spring end plate block, an outer tube disc spring end plate block, a disc spring assembly, and a disc spring end plate; wherein, the inner and outer tubes are provided with connecting flanges at both ends to connect with the speed-sensitive damping module and the displacement-sensitive damping module; the disc spring end plates are located at both ends of the disc spring assembly, adjacent to the inner tube block and the outer tube block.

7. A prefabricated composite damping self-resetting support capable of output protection as described in claim 1, characterized in that, The activation force is set according to the disc spring preload in the reset module and the initial damping force provided by the damping energy dissipation module. During the loading process of the self-resetting support, when the reset module and the damping energy dissipation module are activated and the initial stiffness becomes the activated stiffness, the axial force of the support is the activation force of the support. When the axial force of the self-resetting support is lower than the activation force, the support is in an inactive state, and the stiffness of the support at this time is the initial stiffness, which is the series stiffness of the inner and outer tubes of each module. When the axial force of the self-resetting support is higher than the activation force, the support is in an active state, and the stiffness of the support at this time is the activated stiffness, which is the series and parallel composite stiffness provided by the inner tube, outer tube, reset module and damping energy dissipation module.

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