Double-step self-resetting supporting device

Abstract

The utility model provides a double-step self-resetting supporting device which comprises a first supporting part and a second supporting part, the first supporting part is located in the second supporting part and comprises a web and a flange, and a first anchoring plate and a second anchoring plate are fixed to the two ends of the flange respectively. The first anchoring plate and the second anchoring plate are located at the two ends of the flange respectively, the first anchoring plate and the second anchoring plate are each fixedly connected with two friction plates, the friction plates are located on the two sides of the web plate, and a reset element is fixed between the first anchoring plate and the second anchoring plate. When the earthquake intensity of the structure is low, the support slides in a friction mode so as to dissipate energy, and the earthquake response of the structure is reduced; when the earthquake intensity of the structure is large, the reset element is subjected to tensile deformation to generate additional reset force, so that the residual deformation of the support after unloading is controlled within an acceptable range, and the excessive residual deformation of the building after the earthquake is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of shock-absorbing engineering structures, in particular to a double-stage self-resetting support device. Background Art

[0002] Under the action of an earthquake, building structural components enter a nonlinear phase, dissipating a portion of the earthquake's input energy through elastic-plastic hysteresis, thereby controlling the structure's maximum seismic response and preventing collapse under strong earthquakes. Despite this, the structure may still retain significant residual deformation after the earthquake, meaning it cannot return to its original position. This can lead to the loss of the building's usability and increase the economic cost of post-earthquake repairs, significantly impacting post-disaster reconstruction efforts and the restoration of social order.

[0003] Self-righting devices have attracted considerable attention due to their unique self-righting properties. Their use in buildings can effectively reduce residual deformation after earthquakes. However, achieving this self-righting property comes at the expense of energy dissipation, which amplifies the acceleration response of the structure and further increases damage to non-structural components. Current research has yet to provide a practical solution to the trade-off between energy dissipation and self-righting capabilities of self-righting devices. Utility Model Content

[0004] The purpose of the utility model is to provide a two-stage self-resetting support device, which can realize the staged regulation of energy consumption capacity and self-resetting capacity, and has the advantages of strong recoverability, simple processing, convenient installation, and easy replacement.

[0005] According to one purpose of the utility model, the utility model provides a two-stage self-resetting support device, including a first support component and a second support component, the first support component is located inside the second support component, the first support component includes a web and a flange, the two ends of the flange are respectively fixed with a first anchor plate and a second anchor plate, the first anchor plate and the second anchor plate are respectively located at the two ends of the flange, the first anchor plate and the second anchor plate are fixedly connected with two friction plates, the friction plates are located on both sides of the web, and a reset element is fixed between the first anchor plate and the second anchor plate.

[0006] Furthermore, gaps of the same size are provided between the first anchoring plate, the second anchoring plate and the end portion of the flange.

[0007] Furthermore, the total length of the flange is less than the distance between the first anchor plate and the second anchor plate.

[0008] Furthermore, the first anchoring plate is provided with a middle rectangular through hole, and the middle rectangular through hole matches the outer diameter of the web.

[0009] Furthermore, the first anchoring plate and the second anchoring plate are sequentially provided with centrally symmetrical anchoring through holes, and the resetting element passes through the anchoring through holes on the first anchoring plate and the second anchoring plate sequentially.

[0010] Furthermore, two ends of the resetting element are fixedly connected to the first anchoring plate and the second anchoring plate through anchors.

[0011] Furthermore, the web is provided with a slot-shaped through hole, the friction plate is provided with a friction through hole and a friction material layer, and the friction plate is pressed onto the web by a high-strength bolt group.

[0012] Furthermore, one side of the second supporting component is a connecting end, and the other side of the second supporting component is a square steel tube with a flush cross-section, and a limiting plate is provided inside the square steel tube; the first anchor plate contacts the end face of the square steel tube, and the second anchor plate contacts the side face of the limiting plate.

[0013] Furthermore, the reset element applies a pre-tightening force through the anchor.

[0014] Furthermore, the pre-tightening force of the reset element is greater than the friction force between the friction plate and the web.

[0015] This innovative technical solution achieves a unique dual-stage operating mechanism, combining a frictional energy dissipation mechanism with a self-resetting mechanism. When the structure experiences a low-intensity earthquake, the support deformation is minimal and the structure is in the first operating stage. Frictional slippage occurs in the support, dissipating energy and reducing the structure's seismic response. When the structure experiences a high-intensity earthquake, the support deformation increases significantly and enters the second operating stage. The reset element experiences tensile deformation, generating additional reset force, keeping the residual deformation of the support within an acceptable range after unloading. This prevents excessive residual deformation from remaining after an earthquake and improves the building's post-earthquake recovery capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a support member according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic structural diagram of the first supporting component of an embodiment of the utility model;

[0019] Figure 3 This is a schematic structural diagram of the second supporting component in an embodiment of the present utility model;

[0020] Figure 4 This is a schematic structural diagram of the first anchor plate and the friction plate of an embodiment of the present utility model;

[0021] Figure 5 This is a schematic structural diagram of the second anchor plate and the friction plate of an embodiment of the present utility model;

[0022] Figure 6 This is a cross-sectional view of various positions of the double-stage self-resetting support according to an embodiment of the present utility model;

[0023] Figure 7 This is the expected force-displacement hysteresis curve of the double-stage self-resetting support according to the embodiment of the present invention.

[0024] In the figure: 1-first supporting component, 11-flange, 12-web, 13-groove through hole, 2-second supporting component, 21-limiting plate, 22-connecting end, 3-first anchoring plate, 31-first anchoring through hole, 32-middle rectangular through hole, 4-second anchoring plate, 41-second anchoring through hole, 5-friction plate, 51-friction through hole, 52-friction material layer, 6-resetting element, 7-anchor, 8-high-strength bolt group. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0028] Example 1

[0029] like Figure 1-Figure 7 As shown,

[0030] A double-stage self-resetting support device includes a first support component 1 and a second support component 2, wherein the first support component 1 is located inside the second support component 2. The first support component 1 includes a web 12 and a flange 11, and the web 12 is provided with a slot-shaped through hole 13.

[0031] The first anchoring plate 3 is provided with a middle rectangular through hole 32 , the aperture of which is larger than the outer diameter of the web 12 and smaller than the bottom edge of the flange 11 .

[0032] The rectangular through-holes in the middle of the first anchor plate 3 and the second anchor plate 4 can be sleeved onto the outside of the web 12, and the first anchor plate 3 and the second anchor plate 4 can abut against the end of the flange 11. An initial gap of a certain size is provided between the first anchor plate 3 and the end of the flange 11 of the first support member 1, and a gap of the same size is also provided between the second anchor plate 4 and the end of the flange 11 of the first support member 1.

[0033] The two ends of the reset element 6 are fixed to the anchor plate by anchors 7. The first anchor plate 3 and the second anchor plate 4 are both connected to the two friction plates 5. The friction plates 5 are provided with friction through holes 51 and friction material layers 52, and are pressed against the web 12 of the first support component 1 by a high-strength bolt group 8.

[0034] The flanges 11 on both sides of the first support component 1 have a flush cross-section, and the total length of the flange 11 is less than the net moment between the first anchor plate 3 and the second anchor plate 4. A gap of a certain length is provided between the two ends of the flange 11 of the first support component 1 and the first anchor plate 3 and the second anchor plate 4, and the gap widths of the two are equal.

[0035] The first anchor plate 3 is connected to the two friction plates 5, with the web 12 of the first support member 1 located between the two friction plates 5. The second anchor plate 4 is also connected to the two friction plates 5, with the web 12 of the first support member 1 also located between the two friction plates 5. A certain distance is left between the two friction plates 5 on each side of the web 12 of the first support member 1, and they do not contact each other.

[0036] The friction plate 5 is provided with a friction material layer 52 on a surface close to the first support component 1 , and the friction material layer 52 can be made of materials with stable friction properties such as low carbon steel, wear-resistant steel, bearing steel, non-metallic synthetic materials, and inorganic aramid materials.

[0037] The web 12 of the first support component 1 is provided with a slotted through hole 13, and each friction plate 5 is provided with one or more friction through holes 51; with the plane on which the web 12 of the first support component 1 is located as a projection, the friction through holes 51 are located inside the slotted through holes 13, and the distance from each friction through hole 51 to the end of the slotted through hole 13 is greater than the distance from the end of the flange 11 of the first support component 1 to the first anchor plate 3 or the second anchor plate 4; the web 12 of the first support component 1 is compressed with the two friction plates 5 on both sides thereof by a high-strength bolt group 8, thereby increasing the friction between the friction plates 5 and the web 12.

[0038] One side of the second support component 2 is a connecting end 22, and the other side of the second support component 2 is a combined square steel tube with a flush cross-section, inside which a limiting plate 21 is provided; the first anchor plate 3 contacts the end face of the square steel tube of the second support component 2, and the second anchor plate 4 contacts the side face of the limiting plate 21.

[0039] The first anchoring plate 3 and the second anchoring plate 4 are sequentially provided with a plurality of first anchoring through holes 31 and second anchoring through holes 41 which are centrally symmetrical. The positions of the first anchoring through holes 31 and the second anchoring through holes 41 correspond one to one. The reset element 6 passes through the first anchoring through holes 31 and the second anchoring through holes 41 in sequence and is connected to the first anchoring plate 3 and the second anchoring plate 4 through the anchor 7.

[0040] The reset element 6 can be a shape memory alloy cable, steel strand, spring, or composite disc spring, among other elastic or pseudo-elastic elements. The reset element 6 and the through-hole anchor 7 exert a certain amount of preload force, and the total preload force of all reset elements 6 should be greater than the total friction between the friction plate 5 and the web 12 of the first support member 1.

[0041] When the axial tensile or compressive deformation u of the support is less than u1 (u1 is the distance from the end face of the flange 11 of the first support component 1 to the first anchor plate 3 or the second anchor plate 4), friction slip occurs between the web 12 of the first support component 1 and the friction plate 5, and the friction force will partially but not completely offset the preload force of the reset element 6. At this time, the first anchor plate 3 and the second anchor plate 4 will be pressed against the tubular end face of the second support component 2 and the side face of the limit plate 21, respectively.

[0042] When the axial compressive deformation u of the support is greater than u1, the right end face of the first support component 1 will contact the left end face of the second anchor plate 4, and at the same time, the left end face will separate from the side of the limiting plate 21, and drive the reset element 6 to undergo tensile deformation; when the axial tensile deformation u of the support is greater than u1, the left end face of the flange 11 of the first support component 1 will contact the right end face of the first anchor plate 3, and at the same time, the right end face of the first anchor plate 3 will separate from the left end face of the second support component 2, and drive the reset element 6 to undergo tensile deformation.

[0043] In a two-stage self-resetting support device according to an embodiment of the present invention, when the axial deformation of the support is small, friction slip is used to generate energy dissipation in the first working stage. When the axial deformation of the support is large, the switching of the working stages is achieved through contact or limiting of the various components in the embodiment, and the first working stage enters the second working stage, thereby enhancing the self-resetting ability of the support and controlling the maximum residual deformation of the support during unloading within the expected range.

[0044] This utility model can realize a unique two-stage working mechanism, combining a friction energy dissipation mechanism and a self-reset mechanism. When the structure causes a low earthquake intensity, the support deformation is small and it is in the first working stage. The support undergoes friction slip to dissipate energy and reduce the seismic response of the structure. When the structure causes a high earthquake intensity, the support deformation is large and enters the second working stage. The reset element is subjected to tensile deformation to generate additional reset force, so that the residual deformation of the support after unloading is controlled within an acceptable range, thereby avoiding excessive residual deformation of the building after the earthquake and improving the building's post-earthquake recovery ability.

[0045] Thanks to the above-mentioned two-stage working mechanism, the reset element will only undergo further tensile deformation in the second working stage after the initial preload is applied. Therefore, the timing of the reset element's destruction under large deformation is delayed. Compared with traditional self-resetting devices, this support has better deformation capacity, which is beneficial to improving the overall ductility of the structure and enhancing the structure's anti-collapse ability.

[0046] The present invention provides a two-stage self-resetting support device that exhibits different hysteresis characteristics under different seismic protection level earthquakes. By implementing a two-stage, graded regulation of energy dissipation capacity and self-resetting capacity, the device meets the different seismic performance requirements of structures under earthquakes of varying intensities. When the axial deformation of the two-stage self-resetting support is small, the support is in a first operating stage, absorbing seismic energy through frictional slip between the first support component and the friction plate. At this time, the reset element does not deform. When the axial deformation of the support exceeds a preset threshold, the support enters a second operating stage, and the reset element undergoes tensile deformation, providing additional reset force for the support, thereby controlling the residual deformation of the support under large deformation.

[0047] Furthermore, performance indicators such as friction in the first operating stage, starting displacement in the second operating stage, and load-bearing capacity can be controlled by adjusting the bolt preload and the shape and size of the support components, thereby meeting the performance requirements of different structural types. Compared with previous self-resetting devices, this utility model introduces a unique dual-stage energy dissipation and reset mechanism, which enables staged regulation of energy dissipation and self-resetting capabilities. It also offers advantages such as strong recoverability, simple processing, convenient installation, and ease of replacement.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A two-stage self-resetting support device, characterized in that: The invention comprises a first supporting component and a second supporting component, wherein the first supporting component is located inside the second supporting component, the first supporting component comprises a web and a flange, the two ends of the flange are respectively fixed with a first anchor plate and a second anchor plate, the first anchor plate and the second anchor plate are respectively located at the two ends of the flange, the first anchor plate and the second anchor plate are both fixedly connected with two friction plates, the friction plates are located on both sides of the web, and a reset element is fixed between the first anchor plate and the second anchor plate.

2. The double-stage self-resetting support device according to claim 1, characterized in that: Gaps of the same size are provided between the first anchor plate, the second anchor plate and the end portion of the flange.

3. The double-stage self-resetting support device according to claim 1, characterized in that: The total length of the flange is less than the distance between the first anchor plate and the second anchor plate.

4. The double-stage self-resetting support device according to claim 1, characterized in that: The first anchoring plate is provided with a middle rectangular through hole, and the middle rectangular through hole matches the outer diameter of the web.

5. The double-stage self-resetting support device according to claim 1, characterized in that: The first anchoring plate and the second anchoring plate are sequentially provided with centrally symmetrical anchoring through holes, and the resetting element passes through the anchoring through holes on the first anchoring plate and the second anchoring plate sequentially.

6. The double-stage self-resetting support device according to claim 5, characterized in that: Both ends of the reset element are fixedly connected to the first anchoring plate and the second anchoring plate through anchors.

7. The double-stage self-resetting support device according to claim 1, characterized in that: The web is provided with a slotted through hole, the friction plate is provided with a friction through hole and a friction material layer, and the friction plate is pressed against the web by a high-strength bolt group.

8. The double-stage self-resetting support device according to claim 1, characterized in that: One side of the second supporting component is a connecting end, and the other side of the second supporting component is a square steel tube with a flat cross-section, and a limiting plate is provided inside the square steel tube; the first anchoring plate contacts the end face of the square steel tube, and the second anchoring plate contacts the side face of the limiting plate.

9. The double-stage self-resetting support device according to claim 6, characterized in that: The reset element applies a pre-tightening force through the anchor.

10. The double-stage self-resetting support device according to claim 9, characterized in that: The pre-tightening force of the reset element is greater than the friction force between the friction plate and the web.

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