Viscous damping and friction combined energy dissipation self-centering brace

Abstract

This application discloses a self-resetting support combining viscous damping and friction, comprising: an outer cylinder, an inner rod, a viscous damping assembly, and a friction self-resetting assembly. The inner rod includes a friction self-resetting assembly mounting section, which has multiple spaced-apart meshing protrusions along the axial direction. The friction self-resetting assembly includes a friction plate assembly, an elastic pre-tightening assembly, and a connecting assembly. The friction plate assembly has a meshing surface on its side facing the inner rod that mates with the meshing protrusions and meshing grooves. The friction plate assembly is connected to the friction self-resetting assembly mounting section of the inner rod via the elastic pre-tightening assembly and the connecting assembly. A pre-tightening force is applied to the friction plate assembly by the elastic pre-tightening assembly, causing the meshing surface of the friction plate assembly to mesh with the friction self-resetting assembly mounting section. The friction plate assembly can also move in a direction perpendicular to the axial direction under external force. This reset support features reliable meshing between the friction plate and the inner rod, and convenient installation and maintenance.

Description

Technical Field

[0001] This application relates to the field of energy dissipation and vibration reduction technology in building structures, and in particular to a self-resetting support that combines viscous damping and frictional energy dissipation. Background Technology

[0002] Self-resetting braces are core components in building structures for energy dissipation, vibration reduction, and residual displacement control. Existing self-resetting braces often employ single energy-dissipating forms or complex composite structures, resulting in low energy dissipation efficiency, unstable self-resetting performance, and complex structural design. While single viscous damping braces offer high energy dissipation efficiency and adaptability to different ground motion velocities, they lack self-resetting capability and are prone to residual displacement after an earthquake. Single friction self-resetting braces, although possessing self-resetting performance, have low energy dissipation efficiency, and friction components are prone to uneven wear and misalignment. In particular, the connection reliability between the friction components and the inner rod is insufficient, leading to relative slippage failure. Traditional composite self-resetting braces often employ multi-component splicing structures, resulting in complex force transmission paths and requiring high-level prestress to achieve self-resetting. This is prone to prestress relaxation losses, leading to a decline in self-resetting performance. Furthermore, on-site assembly is difficult, and replacing vulnerable components after an earthquake is challenging.

[0003] In addition, the friction components of existing combined self-resetting supports are mostly embedded and fixed, which has poor coordination with the inner rod and is prone to detachment or jamming, affecting the working performance of the support; the installation space of the core components of some supports is limited, which makes maintenance inconvenient and further increases the cost of use.

[0004] Therefore, there is an urgent need in this field to develop a self-resetting support that combines viscous damping and friction for energy dissipation. This self-resetting support has the advantages of reliable engagement between the friction plate and the inner rod, convenient installation and maintenance, and the combined energy dissipation of viscous damping and friction, as well as low prestress self-resetting. Summary of the Invention

[0005] The purpose of this application is to provide a self-resetting support that combines viscous damping and friction for energy dissipation. This self-resetting support has the advantages of reliable engagement between the friction plate and the inner rod, convenient installation and maintenance, and the combined energy dissipation of viscous damping and friction, as well as low prestress self-resetting.

[0006] This application provides a self-resetting support that combines viscous damping and frictional energy dissipation, comprising: outer cylinder; An inner rod is coaxially inserted inside the outer cylinder and can move relative to the outer cylinder along the axial direction of the outer cylinder. A viscous damping assembly and a friction self-resetting assembly are arranged at intervals between the outer cylinder and the inner rod along the axial direction; The inner rod includes a friction self-resetting component mounting section, which is provided with a plurality of spaced meshing protrusions along the axial direction, and a meshing recess is formed between adjacent meshing protrusions. The friction self-resetting assembly includes a friction plate assembly, an elastic preload assembly, and a connecting assembly. The friction plate assembly has a meshing surface on the side facing the inner rod that mates with the meshing protrusion and the meshing groove. The friction plate assembly is connected to the friction self-resetting assembly mounting section of the inner rod through the elastic preload assembly and the connecting assembly. The elastic preload assembly applies a preload force to the friction plate assembly, causing the meshing surface of the friction plate assembly to mesh with the friction self-resetting assembly mounting section. The friction plate assembly can also move in a direction perpendicular to the axial direction under the action of an external force. When an earthquake causes the inner rod to move relative to the outer cylinder along the axial direction, the engaging protrusion presses against the friction plate assembly, causing the friction plate assembly to move in a direction perpendicular to the axial direction and away from the inner rod, and increasing the preload of the elastic preload assembly and storing elastic potential energy. After the seismic action disappears, the elastic preload assembly releases the elastic potential energy and pushes the friction plate assembly toward the inner rod, so that the meshing surface re-engages with the installation section of the friction self-resetting assembly, thereby restoring the inner rod to its initial position along the axial direction, thus achieving support self-resetting; The viscous damping component is configured to dissipate energy during the movement of the inner rod relative to the outer cylinder.

[0007] In another preferred embodiment, an elongated slot is formed on each engagement protrusion along the axial direction of the inner rod, the elongated slot passing through the corresponding engagement protrusion, and in the initial position, the connecting assembly passes through the middle of the corresponding elongated slot and is connected to the friction plate assembly.

[0008] In another preferred embodiment, the elongated slot is a waist-shaped hole.

[0009] In another preferred embodiment, the friction plate assembly has a through hole, and the connecting assembly is inserted into the through hole and the elongated slot, such that the friction self-resetting assembly mounting section of the inner rod is connected to the friction plate assembly. Preferably, the connecting assembly is a rod.

[0010] In another preferred embodiment, the friction plate assembly is configured to move only in a direction perpendicular to the axial direction.

[0011] In another preferred embodiment, the elongated slot extends in the same direction as the inner rod moves relative to the outer cylinder, and the connecting assembly can slide relative to the elongated slot to allow the inner rod to move axially relative to the connecting assembly and the outer cylinder within a preset travel range.

[0012] In another preferred embodiment, the axial length of the elongated slot defines the maximum displacement of the inner rod relative to the connecting assembly and the outer cylinder, and the starting and ending ends of the elongated slot are both located within the axial range of the corresponding engagement protrusion.

[0013] In another preferred embodiment, the starting and ending ends of the elongated slot are both located axially on the corresponding meshing protrusion. In another preferred embodiment, the elongated slot does not extend into the engagement recess formed between two adjacent engagement protrusions, that is, the elongated slot does not form an engagement recess between the adjacent engagement protrusions.

[0014] In another preferred embodiment, the starting and ending ends of the elongated slot are both located on the corresponding meshing protrusions and do not extend into the meshing recesses formed between adjacent meshing protrusions, thereby limiting the maximum axial displacement of the inner rod.

[0015] In another preferred embodiment, the inner rod further includes an inner rod viscous damping assembly mounting section, on which one or more viscous damping fluid energy dissipation plates are mounted.

[0016] In another preferred embodiment, the inner rod further includes an end connecting section connected to a first connecting lug plate configured to be hinged to the main building structure.

[0017] In another preferred embodiment, the inner rod is a one-piece high-strength steel rod-shaped component.

[0018] In another preferred embodiment, the outer cylinder is a hollow cylinder, and the outer cylinder includes, along its axial direction, an outer cylinder viscous damping component mounting section and a friction self-resetting component mounting opening. The outer surface of the inner rod viscous damping component mounting section, the inner wall of the outer cylinder viscous damping component mounting section, and the end of the friction self-resetting component mounting opening surround to form a damping cavity, which is filled with a viscous damping medium. The friction self-resetting component is installed in the friction self-resetting component mounting opening.

[0019] In another preferred embodiment, the mounting opening of the friction self-resetting assembly is a rectangular opening that extends vertically through the outer cylinder.

[0020] In another preferred embodiment, the outer cylinder further includes an end connecting lug plate, which is welded to one end of the outer cylinder and has the same structure as the first connecting lug plate, for hinged connection with the main building structure.

[0021] In another preferred embodiment, the upper and lower surfaces of the friction self-resetting assembly mounting section are respectively provided with a first plurality of spaced-apart meshing protrusions and a second plurality of spaced-apart meshing protrusions.

[0022] In another preferred embodiment, the rod thickness of the friction self-resetting assembly mounting section is greater than that of the inner rod viscous damping assembly mounting section.

[0023] In another preferred embodiment, the friction plate assembly includes a first friction plate and a second friction plate with the same structure and size. The first friction plate and the second friction plate are respectively provided with a first engagement surface and a second engagement surface that cooperate with the engagement protrusion and the engagement groove on the side facing the friction self-resetting assembly mounting section of the inner rod.

[0024] In another preferred embodiment, the first friction plate and the second friction plate are embedded in the mounting opening of the friction self-resetting assembly, that is, the width of the mounting opening is substantially the same as the width of the first friction plate and the second friction plate, so that the first friction plate and the second friction plate are embedded therein.

[0025] In another preferred embodiment, the friction self-resetting assembly further includes a prestress adjustment component, and the elastic pre-tightening assembly includes a low-prestress disc spring group composed of multiple disc springs connected in series and parallel. One end of the low-prestress disc spring group abuts against the friction plate assembly, and the other end abuts against the prestress adjustment component. The compression amount of the low-prestress disc spring group can be adjusted by rotating the prestress adjustment component.

[0026] It should be understood that, within the scope of this invention, the above-described technical features of this invention and the technical features specifically described below (such as in the embodiments) can be combined with each other to form new or preferred technical solutions. Due to space limitations, they will not be described in detail here. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. It should be understood that the accompanying drawings described below are merely some implementation examples of the present invention, and those skilled in the art can obtain other implementation examples based on these drawings without creative effort.

[0028] Figure 1 This is an overall structural diagram of the viscous damping and friction combined energy dissipation self-resetting support of the present invention, wherein diagram a is the front view, diagram b is the side view, diagram c is the top view, and diagram d is the isometric view; Figure 2 This is an exploded structural diagram of the viscous damping and frictional combined energy dissipation self-resetting support of the present invention. Figure 3aThis is a front view of the inner rod of the present invention; Figure 3b This is a side view of the inner rod of the present invention; Figure 3a This is an isometric view of the inner rod of the present invention; Figure 4a This is a front view of the outer cylinder of the present invention; Figure 4b This is a top view of the outer cylinder of the present invention; Figure 4c For along Figure 4b A cross-sectional view made by the BB section line; Figure 4d Isometric view of the outer cylinder of this invention; Figure 5 This is a schematic diagram of the assembly structure of the friction self-resetting component of the present invention; Figure 6 This is a diagram showing the working state changes of the viscous damping and friction combined energy dissipation self-resetting support of the present invention; Figure 7 A schematic diagram of a self-resetting support with combined viscous damping and frictional energy dissipation installed in a frame is shown.

[0029] In each of the attached figures, the markings are as follows: 1-Inner rod; 1-1-End connection section; 1-2-Viscous damping component mounting section; 1-3-Friction self-resetting component mounting section; 1-3-1-Periodic protrusion; 1-3-2-Slot; 2-Outer cylinder; 2-1-Viscous damping component mounting section; 2-2-Friction self-resetting component mounting opening; 2-3-End connecting lug; 3-Viscous damping component; 3-1-Damping cavity; 3-2-Viscous damping medium; 4-Friction self-resetting assembly; 4-1-Friction plate assembly; 4-2-Prestressed disc spring assembly; 4-3-Connecting rod; 4-4-Prestressed adjustment component. Detailed Implementation

[0030] Through extensive and in-depth research, the inventors have developed for the first time a self-resetting support combining viscous damping and friction. This support integrates a viscous damping component and a friction self-resetting component within the space between the inner rod and the outer cylinder. The upper and lower identical friction plates of the friction self-resetting component are embedded in a pre-reserved opening in the outer cylinder and reliably connected to the inner rod via a meshing structure. This achieves a combined energy dissipation mode of viscous damping as the primary energy dissipation and friction plates as the auxiliary energy dissipation. Stable self-resetting is achieved by relying on a prestressed disc spring assembly. This solves the problems of low energy dissipation efficiency, unstable self-resetting performance, poor coordination between the friction plates and the inner rod, complex structure, and difficulties in assembly and maintenance inherent in traditional supports.

[0031] The viscous damping and friction combined energy dissipation self-resetting support of this application is applicable to the seismic design and energy dissipation and vibration reduction design of new buildings, as well as the seismic reinforcement and performance improvement of existing buildings. It can be adapted to the nodal energy dissipation and vibration reduction of various building structures such as frame structures, shear wall structures, and frame-shear wall structures.

[0032] the term As used herein, the terms “viscous damping and frictional combined energy-dissipating self-resetting support”, “energy-dissipating self-resetting support”, and “support” are used interchangeably.

[0033] In this invention, all directional indicators (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0034] It should be noted that in this patent application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. In this patent application, if it refers to performing an action according to an element, it means performing the action at least according to that element, including two cases: performing the action only according to that element, and performing the action according to that element and other elements. Expressions such as "multiple," "repeatedly," and "various" include two, two times, two kinds, and more than two, more than two times, and more than two kinds.

[0035] In the following description, many technical details are presented to help the reader better understand this application. However, those skilled in the art will understand that the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0036] This application has at least one of the following advantages: (1) Dual-mode coordinated energy dissipation with significant vibration reduction effect: By comprehensively applying the core advantages of viscous damping and friction energy dissipation, the viscous damping component can efficiently dissipate most of the seismic energy under different speed loads and adapt to the characteristics of wide frequency ground motion; the friction plate component achieves auxiliary energy dissipation through uniform sliding friction and further absorbs residual energy. The synergistic effect of the two greatly improves the overall energy dissipation efficiency. Compared with a single energy dissipation form, it can more effectively weaken the impact of external loads on the building structure.

[0037] (2) Precise Reset with Low Prestress, Superior Control of Residual Displacement: Drawing on the concept of prestressed self-reset technology, the preload combined with the buffering effect of viscous damping and the limiting effect of friction engagement achieves stable and precise reset of the support. Viscous damping can alleviate the impact load during the reset process, and the meshing structure of the friction plate ensures the reset accuracy. Under the combined action of the two, the residual displacement of the structure after the earthquake is significantly reduced, effectively avoiding damage to the building function due to residual deformation and reducing the impact of external forces on the long-term use of the building.

[0038] A self-resetting support combining viscous damping and frictional energy dissipation See Figures 1-6 This application provides a viscous damping and friction-based energy-dissipating self-resetting support, including an inner rod 1, an outer cylinder 2, a viscous damping assembly 3, and a friction self-resetting assembly 4, wherein: The outer cylinder 2 is a hollow steel cylindrical structure with openings at both ends. The inner rod 1 is coaxially inserted inside the outer cylinder 2 and can slide relative to the outer cylinder 2 along the axial direction of the outer cylinder 2. The viscous damping component 3 and the friction self-resetting component 4 are both set in the annular gap between the inner rod 1 and the outer cylinder 2 and are arranged sequentially along the support axis.

[0039] The inner rod includes a friction self-resetting assembly mounting section 1-3. The friction self-resetting assembly mounting section 1-3 is provided with a plurality of spaced meshing protrusions 1-3-1 along the axial direction, and a meshing recess is formed between adjacent meshing protrusions 1-3-1. The friction self-resetting assembly includes a friction plate assembly 4-1, an elastic pre-tightening assembly, and a connecting assembly. The friction plate assembly 4-1 has a meshing surface on the side facing the inner rod that mates with the meshing protrusion 1-3-1 and the meshing groove. The friction plate assembly 4-1 is connected to the friction self-resetting assembly mounting section 1-3 of the inner rod through the elastic pre-tightening assembly and the connecting assembly. The elastic pre-tightening assembly applies a pre-tightening force to the friction plate assembly 4-1 so that the meshing surface of the friction plate assembly 4-1 meshes with the friction self-resetting assembly mounting section 1-3. The friction plate assembly 4-1 can also move in a direction perpendicular to the axial direction under the action of external force. When the earthquake causes the inner rod to move relative to the outer cylinder in the axial direction, the meshing protrusion 1-3-1 presses against the friction plate assembly 4-1, causing the friction plate assembly 4-1 to move in a direction perpendicular to the axial direction and away from the inner rod 1, and increasing the preload of the elastic preload assembly and storing elastic potential energy. After the seismic action disappears, the elastic preload component releases elastic potential energy and pushes the friction plate component 4-1 toward the inner rod, so that the meshing surface re-engages with the friction self-resetting component mounting section 1-3, thereby restoring the inner rod 1 to its initial position along the axial direction, thus achieving support self-resetting; The viscous damping component is configured to dissipate energy during the movement of the inner rod relative to the outer cylinder.

[0040] Preferably, the support is anchored to the main building structure through the end flange of the outer cylinder 2 and the end connector of the inner rod 1. Under seismic load, the lateral deformation of the building structure causes the inner rod 1 and the outer cylinder 2 to have axial relative displacement. The viscous damping component 3 is the main energy dissipation component to dissipate seismic energy, and the friction self-resetting component 4 realizes auxiliary friction energy dissipation and low prestress self-resetting. The restoring force of the friction self-resetting component 4 drives the inner rod 1 and the outer cylinder 2 to reset, reducing the post-earthquake residual displacement of the support and structure.

[0041] Preferably, the inner rod 1 is a one-piece high-strength steel rod-shaped component. The inner rod 1 is a one-piece high-strength steel round rod, with an end connecting section 1-1, an inner rod viscous damping component mounting section 1-2, and a friction self-resetting component mounting section 1-3 arranged sequentially along the axial direction. The end connecting section 1-1 has a connecting lug and an external shaft hole for hinged connection with the main building structure. The inner rod viscous damping component mounting section 1-2 has a viscous damping liquid energy-consuming plate, which works with the viscous damping component 3 to dissipate energy. The rod body of the friction self-resetting component mounting section 1-3 is thickened and has periodic protrusions 1-3-1 and grooves 1-3-2, which mesh with the friction self-resetting component 4 for joint operation. The rod body dimensions of the inner rod 1 are adapted to the internal dimensions of the outer cylinder 2, ensuring that the inner rod 1 slides along the axial direction of the outer cylinder 2 without deviation.

[0042] Preferably, the outer cylinder 2 is a hollow square cylinder made of high-strength steel, and the inner wall of the cylinder is provided with a viscous damping component mounting section 2-1 along the axial direction, and a friction self-resetting component mounting opening 2-2 is connected to the end connecting lug plate 2-3. The lug plate 2-3 has a pin hole for hinge connection with the main building structure.

[0043] Preferably, the viscous damping component 3 includes a damping cavity 3-1 and a viscous damping medium 3-2. The damping cavity 3-1 is formed by the outer wall of the inner rod viscous damping component mounting section 1-2 of the inner rod 1 and the inner wall of the viscous damping component mounting opening 2-1 of the outer cylinder 2, and is filled with a high-viscosity silicon-based viscous damping medium 3-2.

[0044] Preferably, the friction self-resetting assembly 4 includes a friction plate assembly 4-1, a prestressed disc spring assembly 4-2, a connecting rod 4-3, and a prestress adjustment component 4-4. The friction plate assembly 4-1 consists of two friction plates, upper and lower, with identical structures, materials, dimensions, and surface treatment processes. The upper and lower friction plates are located at the reserved installation opening 2-2 of the outer cylinder and engage with the inner rod. Under the pre-tightening force of the prestressed disc spring assembly 4-2, they are tightly fitted with the friction self-resetting assembly installation section 1-3 of the inner rod to form a friction engagement surface. The low prestressed disc spring assembly 4-2 is composed of multiple disc springs connected in series and parallel, and is located on the outside of the friction plate assembly 4-1. One end abuts against the friction plate assembly 4-1, and the other end abuts against the prestress adjustment component 4-4. The prestress adjustment component 4-4 is a ring-shaped adjusting nut that is threadedly engaged with the connecting rod 4-3. By rotating the prestress adjustment component 4-4, the compression of the low prestressed disc spring assembly 4-2 can be adjusted to achieve precise application of the prestressing force.

[0045] Preferably, each meshing protrusion 1-3-1 has an elongated slot 1-3-2 along the axial direction of the inner rod 1, the elongated slot 1-3-2 passing through the corresponding meshing protrusion 1-3-1, and the connecting assembly passing through the corresponding elongated slot 1-3-2 and connecting to the friction plate assembly 4-1. Preferably, the connecting assembly is a connecting rod 4-3.

[0046] Preferably, the elongated slot 1-3-2 is a waist-shaped hole.

[0047] Preferably, the extension direction of the elongated slot 1-3-2 is consistent with the movement direction of the inner rod 1 relative to the outer cylinder 2, and the connecting assembly can slide relative to the elongated slot 1-3-2 to allow the inner rod 1 to move axially relative to the connecting assembly and the outer cylinder within a preset stroke range.

[0048] Preferably, the axial length of the elongated slot 1-3-2 limits the maximum displacement of the inner rod 1 relative to the connecting assembly and the outer cylinder, and the starting and ending ends of the elongated slot 1-3-2 are both located within the axial range of the corresponding meshing protrusion 1-3-1.

[0049] Preferably, the elongated groove 1-3-2 does not extend into the meshing recess formed between two adjacent meshing protrusions 1-3-1, that is, the elongated groove 1-3-2 does not form a meshing recess between adjacent meshing protrusions 1-3-1.

[0050] Preferably, the starting and ending ends of the elongated slot 1-3-2 are both located on the corresponding meshing protrusion 1-3-1 and do not extend to the meshing recess formed between adjacent meshing protrusions 1-3-1, so as to limit the maximum axial displacement of the inner rod 1.

[0051] When the seismic load causes the inner rod 1 to move axially relative to the outer cylinder 2, the connecting assembly 4-3 slides axially relative to the inner rod 1 within the elongated slot 1-3-2 until one end of the connecting assembly 4-3 abuts against the elongated slot 1-3-2. At this point, the elongated slot 1-3-2 forms an axial limit on the inner rod 1, thereby limiting the maximum axial displacement of the inner rod 1 relative to the connecting assembly 4-3. Since the starting and ending ends of the elongated slot 1-3-2 are both located on the corresponding meshing protrusions 1-3-1, when the inner rod 1 reaches its maximum working displacement, the connecting assembly 4-3 remains within the axial range of the corresponding meshing protrusions 1-3-1, and the inner rod 1 will not continue to move to the meshing recess formed between adjacent meshing protrusions.

[0052] After the seismic action subsides, the elastic preload assembly 4-2 releases its stored elastic potential energy, pushing the friction plate assembly 4-1 back onto the inner rod 1. The meshing surface of the friction plate assembly 4-1 re-engages with the corresponding meshing protrusion 1-3-1, and through this engagement, the inner rod 1 returns to its initial position. Because the elongated slot 1-3-2 limits the maximum axial displacement of the inner rod 1, the inner rod 1 moves within a preset working stroke throughout the entire loading and resetting process, thus preventing the inner rod 1 from moving to the corresponding position of the adjacent meshing recess, improving the stability and reliability of the self-resetting process.

[0053] In one embodiment, the elongated slot 1-3-2 is arranged along the axial direction of the inner rod 1, and the connecting rod 4-3 is located at the middle of the elongated slot 1-3-2 in the initial support state. The length of the elongated slot 1-3-2 is determined according to the axial deformation requirements of the support under a preset interlayer displacement angle.

[0054] Example See Figures 1-6 This application provides a self-resetting support that combines viscous damping and frictional energy dissipation, such as... Figure 1 and 2 As shown, the viscous damping and friction-based energy-dissipating self-resetting support includes an inner rod 1, an outer cylinder 2, a viscous damping component 3, and a friction self-resetting component 4. The inner rod 1 and the outer cylinder 2 are coaxially nested, and the viscous damping component 3 and the friction self-resetting component 4 are sequentially arranged in the gap between them along the axial direction. The support is hinged and fixed to the main building structure through end lugs.

[0055] As shown in Figure 3, the inner rod 1 is an integral high-strength steel solid square rod, and the rod body is divided into three sections along the axial direction: end connection section 1-1, inner rod viscous damping component installation section 1-2, and friction self-resetting component installation section 1-3.

[0056] End connection section 1-1: A connecting lug is welded on it, and a pin hole is opened on the lug for hinge connection with the main building structure. The lug is fully welded to the rod and the weld is ground and anti-corrosion treated after welding to prevent stress concentration. The arrangement direction of the lug is parallel to the side of the inner rod section to ensure that the hinge receives a balanced force.

[0057] Inner rod viscous damping component installation section 1-2: Multiple evenly distributed viscous damping liquid energy-consuming plates are fixed thereon. The energy-consuming plates are arranged at a preset angle with the axis of the inner rod and are fixed to the inner rod by welding. This is used to enhance the shear effect of the viscous damping medium and improve energy consumption efficiency. The planar structure of the square rod makes the energy-consuming plates more stable under force and avoids the circumferential rotation problem of the circular rod.

[0058] Friction self-resetting component installation section 1-3: The rod body is thickened, and periodic protrusions 1-3-1 and grooves 1-3-2 are set on two opposite sides to form a structure that is compatible with the friction plate 4-1.

[0059] As shown in Figure 4, the outer cylinder 2 is a hollow square cylinder made of high-strength steel. The inner wall of the cylinder is machined axially with a viscous damping component installation section 2-1, a friction self-resetting component installation opening 2-2, and an end connecting ear plate 2-3.

[0060] Viscous damping component installation section 2-1: This is a rectangular space adapted to the viscous damping component 3, used to install and fix the viscous damping component 3; the opening position corresponds to the inner rod energy dissipation plate to ensure the shearing effect of the damping medium.

[0061] Friction self-resetting component mounting opening 2-2: is a rectangular opening that runs vertically through the outer cylinder 2, used to install and limit the upper and lower friction plates, while allowing the friction plates to move slightly along the normal direction of the plate surface.

[0062] End connecting lugs 2-3: Welded to both ends of the outer cylinder 2, with the same structure and position as the end connecting lugs of the inner rod. They are provided with pin holes for hinged connection with the main building structure. The lugs are fully welded to the outer cylinder and the welded joints are treated with anti-corrosion measures. The corners of the outer cylinder are rounded to avoid stress concentration.

[0063] As shown in Figure 4, the viscous damping component 3 is the main energy-consuming component for support, and is located in the front gap between the inner rod 1 and the outer cylinder 2. It includes a damping cavity 3-1 and a viscous damping medium 3-2.

[0064] Damping cavity 3-1: It is a rectangular closed cavity formed by the energy dissipation plate of the inner rod viscous damping component installation section 1-2, the inner wall of the outer cylinder 2 viscous damping component installation section 2-1, and the sealing end plates at both ends; the square cavity makes the damping medium more evenly distributed and the shearing action of the energy dissipation plate more complete.

[0065] Viscous damping medium 3-2: High-viscosity silicon-based damping fluid is used. This medium has no significant attenuation in energy dissipation performance over a wide temperature range, and has good temperature stability and anti-aging properties, making it suitable for use in different regions. The medium filling amount is a preset ratio of the damping cavity volume, with a small amount of expansion space reserved.

[0066] like Figure 5 As shown, the friction self-resetting assembly 4 is a supporting energy-consuming and self-resetting core component, which is set between the inner rod 1 and the outer cylinder 2. It includes a friction plate assembly 4-1, a prestressed disc spring assembly 4-2, a connecting rod 4-3 and a prestressed adjusting component 4-4, which are arranged along the axial direction of the connecting rod 4-3.

[0067] Friction plate assembly 4-1: Composed of an upper friction plate and a lower friction plate, both with identical structures, being rectangular steel plates. The inner walls are machined with meshing teeth that match the periodic protrusions of the inner rod. Both mating surfaces undergo the same standard frosted wear-resistant treatment to ensure uniform friction coefficients and balanced force distribution. The upper and lower friction plates are respectively embedded in the friction self-resetting assembly mounting opening 2-2 of the outer cylinder 2. The normal phase of the plate surface is movable through the limiting on both sides of the opening, while it remains fixed in other directions. The inner meshing structure engages with the inner rod meshing structure.

[0068] Prestressed disc spring assembly 4-2: Composed of multiple high-performance spring steel disc springs connected in series and parallel, it has good elastic recovery performance; the disc spring assembly is set outside the friction plate mounting opening 2-2 of the outer cylinder 2, with one end abutting against the outer side wall of the lower friction plate and the other end abutting against the prestressed adjustment component 4-4.

[0069] Connecting rod 4-3: It is a high-strength steel screw that passes through the prestress adjustment component 4-4, the friction plate assembly 4-1, and the slot 1-3-2 of the inner rod 1, allowing the inner rod 1 to move axially in the support assembly; the connecting rod 4-3 is threaded to cooperate with the prestress adjustment component 4-4, and the length of both ends of the slot 1-3-2 limits the axial displacement of the inner rod 1 relative to the connecting assembly 4-3.

[0070] Prestressing adjustment component 4-4: It is a ring-shaped steel adjusting nut that is threaded to the connecting rod 4-3. By rotating the adjusting nut, it can move along the axial direction of the connecting rod 4-3, thereby adjusting the compression of the prestressed disc spring assembly 4-2 and achieving precise application of low prestress.

[0071] like Figure 6 As shown, the working process of the viscous damping and friction combined energy dissipation self-resetting support of the present invention is divided into an initial state, a loading state, and a reset state, and the characteristics of each state are as follows: Initial state: The support is unloaded, the inner rod 1 and the outer cylinder 2 have no relative displacement and are in a coaxial alignment state; the damping cavity 3-1 of the viscous damping assembly 3 is filled with viscous damping medium 3-2, and the sealing performance is good; the prestressed disc spring group 4-2 of the friction self-resetting assembly 4 is in a compressed state, providing initial prestress, so that the upper and lower friction plates of the friction plate assembly 4-1 are tightly fitted with the wear-resistant pads, the meshing structure of the inner rod 1 is fully engaged with the meshing structure of the friction plate, and the support maintains its initial stiffness.

[0072] Loading State: Under seismic loading, the building structure undergoes lateral deformation, causing axial relative sliding between the inner rod 1 and the outer cylinder 2. The inner rod 1's viscous damping component installation section 1-2 dissipates energy through shear damping fluid, while the friction self-resetting component installation section 1-3 dissipates energy through friction and relative displacement at the friction plate 4-1 via the protrusion 1-3-1. Simultaneously, the protrusion 1-3-1 pushes the friction plate 4-1 outward along the normal direction of the friction plate surface, thereby increasing the prestress and elastic potential energy in the prestressed disc spring assembly 4-2.

[0073] Reset state: When the seismic action disappears, the prestressed disc spring group 4-2 releases the stored elastic potential energy, which is pressed inward by the friction plate 4-1, which is pushed up by the protrusion 1-3-1 of the friction self-resetting component installation section 1-3. Through the engagement of the friction plate 4-1 and the friction self-resetting component installation section 1-3 with the protrusion 1-3-1, the inner rod 1 is pulled back to the initial position, thereby achieving low residual displacement or even no residual displacement of the support.

[0074] The elongated slot 1-3-2 is arranged along the axial direction of the inner rod 1, and the connecting rod 4-3 is located in the middle of the elongated slot 1-3-2 in the initial state of the support. The length of the elongated slot 1-3-2 is determined according to the axial deformation requirements of the support under the preset interlayer displacement angle.

[0075] See Figure 7 , Figure 7 A schematic diagram of a self-resetting brace combining viscous damping and frictional energy dissipation is shown, installed in a frame with a story height of H. The frame structure has a story height of H, and the self-resetting brace forms an installation angle α with the horizontal direction. When the frame structure reaches the design inter-story drift angle θ under seismic loading, the frame generates a corresponding inter-story horizontal displacement, causing axial deformation of the self-resetting brace. The length of the elongated slot 1-3-2 is determined based on the axial deformation of the self-resetting brace at the design inter-story drift angle θ, ensuring that the connecting member 4-3 has a sliding stroke within the elongated slot 1-3-2 that meets the design deformation requirements.

[0076] In this embodiment, the self-resetting support is installed in the frame structure with a floor height of H at an angle α to the horizontal direction. The axial deformation of the self-resetting support when the frame structure reaches the preset inter-story drift angle θ is used as the unidirectional design sliding stroke of the connecting rod 4-3. The length L of the elongated slot 1-3-2 must meet the following requirements: .

[0077] All documents mentioned in this application are considered to be incorporated in their entirety into the disclosure of this application so that they can serve as a basis for modifications if necessary. Furthermore, it should be understood that after reading the foregoing disclosure of this application, those skilled in the art can make various alterations or modifications to this application, and these equivalent forms also fall within the scope of protection claimed in this application.

Claims

1. A self-resetting support combining viscous damping and frictional energy dissipation, characterized in that, include: outer cylinder; An inner rod is coaxially inserted inside the outer cylinder and can move relative to the outer cylinder along the axial direction of the outer cylinder. A viscous damping assembly and a friction self-resetting assembly are arranged at intervals between the outer cylinder and the inner rod along the axial direction; The inner rod includes a friction self-resetting component mounting section, which is provided with a plurality of spaced meshing protrusions along the axial direction, and a meshing recess is formed between adjacent meshing protrusions. The friction self-resetting assembly includes a friction plate assembly, an elastic preload assembly, and a connecting assembly. The friction plate assembly has a meshing surface on the side facing the inner rod that mates with the meshing protrusion and the meshing groove. The friction plate assembly is connected to the friction self-resetting assembly mounting section of the inner rod through the elastic preload assembly and the connecting assembly. The elastic preload assembly applies a preload force to the friction plate assembly, causing the meshing surface of the friction plate assembly to mesh with the friction self-resetting assembly mounting section. The friction plate assembly can also move in a direction perpendicular to the axial direction under the action of an external force. When an earthquake causes the inner rod to move relative to the outer cylinder along the axial direction, the engaging protrusion presses against the friction plate assembly, causing the friction plate assembly to move in a direction perpendicular to the axial direction and away from the inner rod, and increasing the preload of the elastic preload assembly and storing elastic potential energy. After the seismic action disappears, the elastic preload assembly releases the elastic potential energy and pushes the friction plate assembly toward the inner rod, so that the meshing surface re-engages with the installation section of the friction self-resetting assembly, thereby restoring the inner rod to its initial position along the axial direction, thus achieving support self-resetting; The viscous damping component is configured to dissipate energy during the movement of the inner rod relative to the outer cylinder.

2. The combined energy-dissipating self-resetting support as described in claim 1, characterized in that, A long slot is formed on each engagement protrusion along the axial direction of the inner rod. The long slot passes through the corresponding engagement protrusion. In the initial position, the connecting assembly passes through the middle of the corresponding long slot and is connected to the friction plate assembly.

3. The combined energy-dissipating self-resetting support as described in claim 2, characterized in that, The elongated slot extends in the same direction as the inner rod relative to the outer cylinder. The connecting assembly can slide relative to the elongated slot to allow the inner rod to move axially relative to the connecting assembly and the outer cylinder within a preset stroke range.

4. The combined energy-dissipating self-resetting support as described in claim 3, characterized in that, The axial length of the elongated slot defines the maximum displacement of the inner rod relative to the connecting assembly and the outer cylinder, and the starting and ending ends of the elongated slot are both located within the axial range of the corresponding meshing protrusion.

5. The combined energy-dissipating self-resetting support as described in claim 1, characterized in that, The inner rod also includes an inner rod viscous damping component mounting section, on which one or more viscous damping liquid energy dissipation plates are mounted.

6. The combined energy-dissipating self-resetting support as described in claim 5, characterized in that, The outer cylinder is a hollow cylinder. Along its axial direction, the outer cylinder includes, in sequence, an outer cylinder viscous damping component mounting section and a friction self-resetting component mounting opening. The outer surface of the inner rod viscous damping component mounting section, the inner wall of the outer cylinder viscous damping component mounting section, and the end of the friction self-resetting component mounting opening surround to form a damping cavity. The damping cavity is filled with a viscous damping medium, and the friction self-resetting component is installed in the friction self-resetting component mounting opening.

7. The combined energy-dissipating self-resetting support as described in claim 1, characterized in that, The upper and lower surfaces of the friction self-resetting assembly mounting section are respectively provided with a first plurality of spaced-apart meshing protrusions and a second plurality of spaced-apart meshing protrusions.

8. The combined energy-dissipating self-resetting support as described in claim 7, characterized in that, The thickness of the rod in the friction self-resetting assembly mounting section is greater than that in the inner rod viscous damping assembly mounting section.

9. The combined energy-dissipating self-resetting support as described in claim 7, characterized in that, The friction plate assembly includes a first friction plate and a second friction plate with the same structure and size. The first friction plate and the second friction plate are respectively provided with a first engagement surface and a second engagement surface that cooperate with the engagement protrusion and the engagement groove on the side facing the friction self-resetting assembly mounting section of the inner rod.

10. The combined energy-dissipating self-resetting support as described in claim 1, characterized in that, The friction self-resetting assembly also includes a prestress adjustment component. The elastic pre-tightening assembly includes a low-prestress disc spring group composed of multiple disc springs connected in series and parallel. One end of the low-prestress disc spring group abuts against the friction plate assembly, and the other end abuts against the prestress adjustment component. The compression amount of the low-prestress disc spring group can be adjusted by rotating the prestress adjustment component.

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