Self-centering shear-resistant device with low prestress requirements for unidirectional-fixture force transmission

Abstract

Provided in the present invention is a self-centering shear-resistant device with low prestress requirements for unidirectional-fixture force transmission, the self-centering shear-resistant device comprising a replaceable energy-dissipation system, a self-centering prestress system, and a support and transmission mechanism configured for connection to the outside and energy input, wherein the energy-dissipation system, the self-centering prestress system and the support and transmission mechanism form an integrated unit, and the support and transmission mechanism is connected to the outside to introduce energy. When the device is subjected to shear deformation, the energy-dissipation system is subjected to tensile yielding deformation, and at the same time, the self-centering prestress system is subjected to compressive deformation; and resetting is completed by means of restoring force generated by compressive deformation of the self-centering prestress system during loading. The present invention does not require finish machining of members with a low manufacturing cost and stable and reliable performance. The problems of high-level prestress requirements and limited deformation capacity in self-centering energy-dissipating devices are solved, and fully self-centering of the device can be achieved only by applying a small amount of prestress. The energy-dissipation element of the device is arranged on the periphery and can be replaced after an earthquake without disassembling the whole device and the device can be replaced, thereby facilitating rapid repair of the device.

Description

A self-resetting shearing device with low prestressing requirement and one-way clamp force transmission Technical Field

[0001] The present invention is used for the seismic design of new buildings and the seismic reinforcement of existing buildings. Background Art

[0002] Energy-dissipating shear devices are currently used in a wide range of scenarios, such as between shear walls and columns, between different spans of frames, and at the inflection point of coupling beams. These devices, based on the ductility requirements of seismic design, yield before the main structure, concentrating deformation and energy dissipation within the device to protect the main structure.

[0003] Numerous energy-dissipating shear devices exist, based on different energy dissipation principles, including viscoelastic, mild steel, friction, lead-rubber, mild steel-viscoelastic composite, and lead-rubber. While these traditional energy-dissipating shear devices offer strong energy dissipation capabilities, they also result in large residual displacements after an earthquake, slowing the structure's functional recovery. Self-resetting energy-dissipating shear devices offer efficient energy dissipation while automatically restoring the structure to its normal state, resolving the significant residual displacements associated with traditional energy-dissipating shear devices.

[0004] There is relatively little research on existing self-resetting energy-absorbing shear-resistant devices. All known self-resetting energy-absorbing shear-resistant devices require a high level of prestress to overcome the frictional resistance of their own energy-absorbing systems to achieve self-resetting of the device. However, the need to apply a high level of prestress increases the difficulty of construction, and there are problems such as prestress loss under long-term action. Summary of the Invention

[0005] To address the shortcomings and deficiencies of existing self-resetting energy dissipation devices, the present invention proposes a self-resetting shear-resistant device with a one-way clamp force transmission and low prestress requirement. This device, through the relative sliding of a high-strength steel rod and a self-locking clamp during the reset process, eliminates the frictional resistance of the energy dissipation system against reset, achieving the goal of fully resetting the device with a small amount of prestress. This new device provides both energy dissipation and self-resetting capabilities during shear deformation; only a small amount of prestress is required to fully reset the device. It also boasts strong deformation capacity, low cost, reliable performance, and easy replacement of energy dissipation components after an earthquake.

[0006] In order to achieve the above objectives, the present invention provides the following technical solutions:

[0007] A self-resetting shear-resistant device with low prestress requirement and one-way clamp force transmission includes a replaceable energy dissipation system, a self-resetting prestressing system, and a bracket and transmission mechanism for installing the energy dissipation system and the self-resetting prestressing system; the three form an integrated body, which is connected to the outside for energy introduction through the bracket and transmission mechanism; when the device undergoes shear deformation (loading), the energy dissipation system therein is subjected to tensile yield deformation, while the prestressed screw in the self-resetting prestressing system is subjected to tensile elastic deformation and the disc spring group is subjected to compressive elastic deformation, and the device completes the reset through the restoring force generated by the deformation of the self-resetting prestressing system during the shear deformation (loading) process.

[0008] The bracket and transmission mechanism include an upper connecting member 1, an intermediate connecting member 9, and a lower connecting member 4, which constitute a bracket for installing the self-resetting prestressed system and the energy dissipation system; wherein, the two end surfaces of the upper connecting member 1 and the lower connecting member 4 determine the initial length L of the shear energy dissipation device before separation in the longitudinal direction:

[0009] It also includes a left-end connecting part 2 and a right-end connecting part 3, which together form a movable nesting structure; the movable nesting structure is located between the upper-end connecting part 1 and the middle connecting part 9, and extends through the wings to input external shear dislocation and introduce energy;

[0010] The movable axis of the movable nesting structure is arranged in the cavity of the upper connecting part 1, and the two wings extend from the side wall of the cavity. The upper and lower ends of the movable axis are rigidly in contact with the upper connecting part 1 and the lower connecting part 4 respectively. After the input shear dislocation, the movable nesting structure slides axially against each other and pushes the upper connecting part 1 and the lower connecting part 4 to separate relatively.

[0011] Specifically, the upper end connecting component 1 has a main body that is a hollow cylinder, which is divided into two upper and lower open cavities by an intermediate plate 1-4. A top connecting plate 1-1 is fixed to the top opening of the upper cavity 1-2, and the lower cavity 1-3 has an open bottom and side walls that are symmetrically grooved along the central axis of the cavity.

[0012] The lower end connecting member 4 includes a cylindrical rod 4-1 and a bottom connecting plate 4-2 fixed to the bottom of the cylindrical rod 4-1;

[0013] The intermediate connecting member 9 is provided with a central opening for the lower cavity 1-3 of the upper connecting member 1 through;

[0014] The movable nested structure includes a left-end connecting component 2 and a right-end connecting component 3, and the insertion of the right-end connecting component 3 into the left-end connecting component 2 is taken as an example;

[0015] The left end connecting component 2 includes a first cylinder 2-1 with a grooved side wall and a first wing 2-2, the first wing 2-2 is fixed to the outer wall of the first cylinder 2-1, and the side wall of the first cylinder 2-1 is provided with a groove;

[0016] The right end connecting component 3 includes a second cylinder 3-1 and a second wing 3-2, and the second wing 3-2 is fixed to the outer wall of the second cylinder 3-1;

[0017] The first cylinder 2-1 and the second cylinder 3-1 are at the same height;

[0018] The second cylinder 3-1 is placed inside the first cylinder 2-1 to form a movable axis of a movable nested structure. The second wing 3-2 extends from the groove on the side wall of the first cylinder 2-1, thereby forming a pair of wings of a movable nested structure with the first wing 2-2 on the other side of the movable axis.

[0019] Conversely, the positions of the left and right end connecting parts are interchanged, and vice versa.

[0020] In the axial direction, that is, the length direction, the movable nested structure is placed in the lower cavity 1-3 of the upper connecting part 1, and the first wing 2-2 and the second wing 3-2 extend from the slots on both sides of the lower cavity 1-3 for connecting to the outside; the top of the movable shaft body of the movable nested structure is in rigid contact with the middle plate 1-4 of the upper connecting part 1, and the bottom of the movable shaft body is placed on the top of the cylindrical rod 4-1 of the lower connecting part 4 and in rigid contact; the upper and lower overlapping movable shaft bodies and cylindrical rod 4-1 are inserted together and confined in the lower cavity 1-3; under external energy input, the movable nested structure slides axially against each other to promote relative displacement between the upper connecting part 1 and the lower connecting part 4.

[0021] Furthermore, the width W of the first wing 2-2 is 2,2 The width W3 of the second wing 3-2 must be smaller than the slot width W1 of the lower cavity 1-3 of the upper connecting part 1, and the width W3 of the second wing 3-2 must also be smaller than the slot width W1 of the first cylinder 2-1 of the left connecting part 2. 2,1 The slot width W1 of the lower cavity 1-3 of the upper connecting component 1 is to ensure that the left connecting component 2 and the right connecting component 3 can shift relative to each other in the lower cavity 1-3.

[0022] Furthermore, the sum of the height H4 of the cylindrical rod 4-1 and the height H2 of the movable shaft needs to be slightly larger than the height H1 of the lower cavity 1-3 of the upper connecting part. In order to ensure that the cylindrical rod 4-1 is always in the lower cavity 1-3 of the upper connecting part 1 when the invention is working, twice the height H2 of the movable shaft needs to be smaller than the height H1 of the lower cavity 1-3, satisfying the following relationship:.

[0023] The energy dissipation system includes two or more energy dissipation steel bars 8;

[0024] The upper and lower ends of the energy-absorbing steel rod 8 are fixed to the top connecting plate 1 - 1 of the upper connecting component 1 and the middle connecting component 9 respectively.

[0025] Specifically, the energy-absorbing steel rod 8 is divided into three sections, the middle section is the core energy-absorbing section 8-1, and the upper and lower sections are the connecting sections 8-2. The core energy-absorbing section 8-1 will yield and dissipate energy when subjected to tension, while the connecting section 8-2 has a larger diameter to ensure that it will not yield during loading.

[0026] The self-resetting prestressed system includes a prestressed system and a self-resetting system:

[0027] Among them, the prestressed system includes a prestressed screw 5, a disc spring baffle 6 and a disc spring group 7, and the disc spring baffle 6 is arranged at the top of the disc spring group 7; the disc spring group 7 is composed of multiple disc springs in parallel, and the disc spring group 7 and the disc spring baffle 6 are arranged in the upper cavity 1-2 of the upper connecting component 1; the top connecting plate 1-1 of the upper connecting component 1, the second cylinder 3-1 of the right connecting component 3, the cylindrical rod 4-1 of the lower connecting component 4 and the bottom connecting plate 4-2 of the lower connecting component 4 are all reserved with through holes in the center, and the upper end of the prestressed screw 5 is fixed to the disc spring baffle 6, passes through the spring group 7 and the through holes of each connecting component in turn, and then is fixed to the bottom connecting plate 4-2;

[0028] The self-resetting system includes a self-locking clamp 10 and a high-strength steel rod 11; the self-locking clamp 10 is fixed to the intermediate connecting component 9, and the high-strength steel rod 11 is arranged between the intermediate connecting component 9 and the lower connecting component 4; specifically, the upper end of the high-strength steel rod 11 is connected to the self-locking clamp 10, and the lower end of the high-strength steel rod 11 is fixed to the bottom connecting plate 4-2 of the lower connecting component 4, together forming a one-way force transmission element;

[0029] Specifically, the self-locking clamp 10 in the self-resetting system includes an anchor ring 10-1, a clip 10-2, an O-type rubber ring 10-3, a reset spring 10-4 and a pressure cover assembly 10-5, wherein the clip 10-2 is a multi-piece, built into the anchor ring 10-1, enclosed outside the high-strength steel rod 11, and a groove is reserved at its end and an O-type rubber ring 10-3 is provided, so that it can work stably in the gap cavity between the anchor ring 10-1 and the high-strength steel rod 11; the reset spring 10- 4 is arranged on the upper part of the clip 10-2, and the high-strength steel rod 11 passes through the return spring 10-4; the cover assembly 10-5 is arranged on the upper part of the anchor ring 10-1 to support the return spring 10-4 and stabilize the axial direction during operation; when subjected to tension, the self-locking clamp 10 bears the force by engaging the multiple enclosed clips 10-2 and the high-strength steel rod 11; and when subjected to compression, the clips 10-2 and the high-strength steel rod 11 are loosened, and relative sliding occurs between the clips 10-2 and the high-strength steel rod 11 without bearing the force.

[0030] Furthermore, in the bracket and the transmission mechanism, the positions of the left-end connecting component 2 and the right-end connecting component 3 can be interchanged.

[0031] Furthermore, in the self-resetting prestressed system, the prestressed screw 5 is fixed to the disc spring baffle 6 and the bottom connecting plate 4-2 of the lower connecting part 4 by bolts; the self-locking clamp 10 can be fixed to the middle connecting part 9 by welding; the high-strength steel rod 11 can be fixed to the bottom connecting plate 4-2 of the lower connecting part 4 by nuts.

[0032] Furthermore, in the energy dissipation system, the connecting section 8-2 of the energy dissipation steel rod 8 is engraved with threads, and the upper and lower ends of the energy dissipation steel rod 8 can be fixed to the top connecting plate 1-1 of the upper end connecting component and the middle connecting component 9 respectively by nuts.

[0033] One-way clamp force transmission low prestressing demand self-resetting shear device, the working mechanism is as follows:

[0034] 1) In the initial static state, the top of the movable shaft of the movable nested structure composed of the left connecting part 2 and the right connecting part 3 is in close contact with the middle plate 1-4 of the upper connecting part 1; the energy-absorbing steel rod 8 is stationary on the device;

[0035] 2) Due to an earthquake disaster, an external force is input from a certain direction. When shear deformation is required, the left connecting component 2 and the right connecting component 3 of the device are subjected to the external force and shift relative to each other, pushing the upper connecting component 1 and the lower connecting component 4 to undergo axial relative displacement. At this time:

[0036] The disc spring group 7 in the prestressed system is continuously compressed and stores energy in the upper cavity 1-3;

[0037] At the same time, the high-strength steel rod 11 in the self-resetting system engages with the self-locking clamp 10 to exert a self-locking function;

[0038] At the same time, the energy-dissipating steel rod 8 outside the upper cavity 1-3 enters the energy-dissipating mechanism, and the energy-dissipating material is stretched and deformed, and the energy is dissipated by yielding under tension;

[0039] 3) Entering the critical state, when the external energy, i.e., the external force, stops inputting, or when the energy stored in the disc spring group 7 is greater than the external force, the displacement of the left connecting part 2 and the right connecting part 3 of the device begins to decrease. At this time:

[0040] The prestressed system consisting of the prestressed screw 5 and the disc spring group 7 in series will undergo a reset action due to compression;

[0041] As the prestressed system resets, the high-strength steel rod 11 and the self-locking clamp 10 in the self-resetting system perform an unlocking function and slide relative to each other, and the high-strength steel rod 11 extends out of the self-locking clamp 10 .

[0042] The beneficial effects of the present invention are:

[0043] (1) Widely used engineering components realize the low prestress characteristics of the self-resetting device, which does not require component finishing, is low in cost, and has stable and reliable performance;

[0044] (2) It solves the problem that the self-resetting energy dissipation device needs to apply high level prestress and has limited deformation capacity;

[0045] (3) Only a small amount of prestress is required to achieve complete self-reset of the device;

[0046] (4) The energy-consuming components of the device are arranged on the periphery and can be replaced without disassembling the entire device after an earthquake, allowing the device to be repaired quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] FIG1 is a structural diagram of a one-way clamp force transmission low prestress demand self-resetting shearing device according to the present invention;

[0048] FIG2 is a cross-sectional view of a one-way clamp force transmission low prestress requirement self-resetting shearing device according to the present invention;

[0049] Figure 3 is a structural diagram of the bracket and the connecting parts of the transmission mechanism;

[0050] FIG4 is a cross-sectional view of the bracket and the connecting parts of the transmission mechanism;

[0051] Figure 5 is a structural diagram of the upper end connecting component;

[0052] Figure 6 is a cross-sectional view of the upper end connecting member;

[0053] FIG7 is a structural diagram of the left end connecting member and the right end connecting member;

[0054] Figure 8 is a structural diagram of the lower end connecting component;

[0055] Figure 9 is a schematic diagram of the disc spring assembly connected to the disc spring baffle;

[0056] Figure 10 is a schematic diagram of an energy-dissipating steel rod;

[0057] FIG11 is a schematic diagram showing the structure and state comparison of a self-locking clamp according to an embodiment;

[0058] FIG12 is a schematic diagram of the deconstruction of a one-way clamp force transmission low prestress demand self-resetting shear device of the present invention;

[0059] FIG13 is a schematic diagram of an application scenario of the device of the embodiment;

[0060] FIG14 is a diagram showing the deformation and energy consumption mechanism of the embodiment device;

[0061] Description of the numbers in the figure:

[0062] 1 is the upper connecting component, 1-1 is the top connecting plate, 1-2 is the upper cavity, 1-3 is the lower cavity, and 1-4 is the middle plate;

[0063] 2 is the left end connecting component, 2-1 is the first cylinder, and 2-2 is the first wing;

[0064] 3 is the right end connecting component, 3-1 is the second cylinder, and 3-2 is the second wing;

[0065] 4 is the lower end connecting component, 4-1 is the cylindrical rod, and 4-2 is the bottom connecting plate;

[0066] 5 is the prestressed screw, 6 is the disc spring baffle, 7 is the disc spring assembly,

[0067] 8 is the energy-absorbing steel rod, 8-1 is the core energy-absorbing section, and 8-2 is the connecting section;

[0068] 9 is an intermediate connecting component;

[0069] 10 is a self-locking clamp, 10-1 is an anchor ring, 10-2 is a clip, 10-3 is an O-shaped rubber ring, 10-4 is a clamp return spring, and 10-5 is a gland assembly;

[0070] 11 is a high-strength steel bar. DETAILED DESCRIPTION

[0071] The technical solution provided by this application will be further described below in conjunction with specific embodiments and accompanying drawings. The advantages and features of this application will become more apparent with reference to the following description.

[0072] It should be noted that the embodiments of the present application have better feasibility and are not intended to limit the present application in any form. The technical features or combinations of technical features described in the embodiments of the present application should not be considered in isolation, and they can be combined with each other to achieve better technical effects. The scope of the preferred embodiments of the present application may also include other implementations, and this should be understood by those skilled in the art in the technical field to which the embodiments of the present application belong.

[0073] Technologies, methods, and apparatus known to persons of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0074] The drawings of this application are all in a very simplified form and are not in precise proportions. They are only used to conveniently and clearly assist in explaining the purpose of the embodiments of this application, and are not intended to limit the conditions under which this application can be implemented. Any structural modification, change in proportional relationship, or adjustment of size should fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application. The same reference numerals appearing in the drawings of this application represent the same features or components and can be applied to different embodiments.

[0075] The present invention proposes a one-way clamp force transmission low prestress requirement self-resetting shear anti-device, the structure of which is shown in Figures 1 and 2, comprising: a replaceable energy dissipation system, a self-resetting prestressed system, and a bracket and transmission mechanism for installing the energy dissipation system and the self-resetting prestressed system; the three form an integrated body, which is connected to the outside for energy introduction through the bracket and the transmission mechanism; in terms of functional relationship, when the device undergoes shear deformation (loading), the energy dissipation system therein is subjected to tensile yield deformation, and at the same time, the prestressed screw in the self-resetting prestressed system is subjected to tensile elastic deformation, and the disc spring group is subjected to compressive elastic deformation, and the device completes the reset through the restoring force generated by the deformation of the self-resetting prestressed system during the shear deformation (loading) process.

[0076] As shown in Figures 3 and 4, the bracket and transmission mechanism include an upper connecting member 1, an intermediate connecting member 9, and a lower connecting member 4, which constitute a bracket for installing the self-resetting prestressed system and the energy dissipation system; wherein, the two end surfaces of the upper connecting member 1 and the lower connecting member 4 determine the initial length L of the shear energy dissipation device before separation in the longitudinal direction;

[0077] It also includes a left-end connecting part 2 and a right-end connecting part 3, which together form a movable nesting structure; the movable nesting structure is located between the upper-end connecting part 1 and the middle connecting part 9, and extends through the wings to input external shear dislocation and introduce energy;

[0078] The movable axis of the movable nesting structure is arranged in the cavity of the upper connecting part 1, and the two wings extend from the side wall of the cavity. The upper and lower ends of the movable axis are rigidly in contact with the upper connecting part 1 and the lower connecting part 4 respectively. After the input shear dislocation, the movable nesting structure slides axially against each other and pushes the upper connecting part 1 and the lower connecting part 4 to separate relatively.

[0079] Specifically, in the bracket and transmission mechanism:

[0080] As shown in Figures 5 and 6, the upper end connecting component 1 has a main body that is a hollow cylinder, which is divided into two upper and lower open cavities by an intermediate plate 1-4, wherein a top connecting plate 1-1 is fixed at the top opening of the upper cavity 1-2, and the lower cavity 1-3 has an open bottom and the side walls are symmetrically grooved along the central axis of the cavity.

[0081] As shown in FIG8 , the lower end connecting component 4 includes a cylindrical rod 4 - 1 and a bottom connecting plate 4 - 2 fixed to the bottom of the cylindrical rod 4 - 1 .

[0082] Furthermore, as an embodiment, in order to allow the lower cavity 1 - 3 of the upper connecting component 1 to pass through, an opening is provided in the center of the middle connecting component 9 .

[0083] As shown in FIG7 , the movable nested structure formed by the left-end connecting component 2 and the right-end connecting component 3 is described by taking the insertion of the right-end connecting component 3 into the left-end connecting component 2 as an example:

[0084] The left end connecting component 2 includes a first cylinder 2-1 with a grooved side wall and a first wing 2-2, the first wing 2-2 is fixed to the outer wall of the first cylinder 2-1, and the side wall of the first cylinder 2-1 is provided with a groove;

[0085] The right end connecting component 3 includes a second cylinder 3-1 and a second wing 3-2, and the second wing 3-2 is fixed to the outer wall of the second cylinder 3-1;

[0086] The first cylinder 2-1 and the second cylinder 3-1 are at the same height;

[0087] The second cylinder 3-1 is placed inside the first cylinder 2-1 to form a movable axis of a movable nested structure. The second wing 3-2 extends from the groove on the side wall of the first cylinder 2-1, thereby forming a pair of wings of a movable nested structure with the first wing 2-2 on the other side of the movable axis.

[0088] Conversely, the positions of the left and right end connecting parts are interchanged, and vice versa.

[0089] Furthermore, in the axial direction, that is, the length direction, the movable nested structure is placed in the lower cavity 1-3 of the upper end connecting part, and the first wing 2-2 and the second wing 3-2 extend from the slots on both sides of the lower cavity 1-3 for connecting to the outside; the top of the movable shaft body of the movable nested structure is rigidly in contact with the middle plate 1-4, and the bottom of the movable shaft body is placed on the top of the cylindrical rod 4-1 and is rigidly in contact; the upper and lower overlapping movable shaft bodies and cylindrical rod 4-1 are both inserted together and confined in the lower cavity 1-3.

[0090] Under external energy input, the movable nested structures slide axially relative to each other to promote relative displacement between the upper connecting component 1 and the lower connecting component 4.

[0091] Furthermore, the width W of the first wing 2-2 is 2,2 The width W3 of the second wing 3-2 must be smaller than the slot width W1 of the lower cavity 1-3 of the upper connecting part 1, and the width W3 of the second wing 3-2 must also be smaller than the slot width W1 of the first cylinder 2-1 of the left connecting part 2. 2,1 The slot width W1 of the lower cavity 1-3 of the upper connecting component 1 is to ensure that the left connecting component 2 and the right connecting component 3 can shift relative to each other in the lower cavity 1-3.

[0092] Furthermore, the sum of the height H4 of the cylindrical rod 4-1 and the height H2 of the movable shaft needs to be slightly larger than the height H1 of the lower cavity 1-3 of the upper connecting part. In order to ensure that the cylindrical rod 4-1 is always in the lower cavity 1-3 of the upper connecting part 1 when the invention is working, twice the height H2 of the movable shaft needs to be smaller than the height H1 of the lower cavity 1-3, satisfying the following relationship:.

[0093] The energy dissipation system includes two or more energy dissipation steel bars 8;

[0094] The upper and lower ends of the energy-absorbing steel rod 8 are fixed to the top connecting plate 1 - 1 of the upper connecting component 1 and the middle connecting component 9 respectively.

[0095] During use, the energy-consuming steel rod 8 is a consumable item and can be replaced.

[0096] Specifically, as shown in Figure 10, the energy-absorbing steel rod 8 is divided into three sections, the middle section is the core energy-absorbing section 8-1, and the upper and lower sections are the connecting sections 8-2. The core energy-absorbing section 8-1 will yield and dissipate energy when subjected to tension, while the connecting section 8-2 has a larger diameter to ensure that it will not yield during loading.

[0097] Furthermore, as an embodiment, the connecting section 8-2 of the energy-absorbing steel rod 8 is engraved with threads, and the upper and lower ends of the energy-absorbing steel rod 8 can be fixed to the top connecting plate 1-1 of the upper end connecting component and the middle connecting component 9 respectively by nuts.

[0098] The self-resetting prestressing system includes a prestressing system and a self-resetting system, which are installed on the bracket and the transmission mechanism:

[0099] As shown in Figures 1 and 9, the prestressed system includes a prestressed screw 5, a disc spring baffle 6 and a disc spring group 7. The disc spring baffle 6 is arranged at the top of the disc spring group 7; the disc spring group 7 is composed of multiple disc springs in parallel, and the disc spring group 7 and the disc spring baffle 6 are arranged in the upper cavity 1-2 of the upper connecting component; the top connecting plate 1-1 of the upper connecting component 1, the second cylinder 3-1 of the right connecting component 3, the cylindrical rod 4-1 of the lower connecting component 4 and the bottom connecting plate 4-2 of the lower connecting component 4 are all reserved with through holes in the center, and the upper end of the prestressed screw 5 is fixed to the disc spring baffle 6, passes through the spring group 7 and the through holes of each connecting component in turn, and then is fixed to the bottom connecting plate 4-2;

[0100] Furthermore, as an embodiment, the prestressed screw rod 5 can be fixed to the top disc spring baffle 6 and the bottom connecting plate 4-2 of the lower end connecting component 4 by bolts respectively.

[0101] Among them, the self-resetting system includes a self-locking clamp 10 and a high-strength steel rod 11; the self-locking clamp 10 is fixed on the intermediate connecting component 9, and the high-strength steel rod 11 is arranged between the intermediate connecting component 9 and the lower end connecting component 4, as shown in Figure 1; specifically, the upper end of the high-strength steel rod 11 is connected to the self-locking clamp 10, and the lower end of the high-strength steel rod 11 is fixed to the bottom connecting plate 4-2 of the lower end connecting component 4, together forming a one-way force transmission element.

[0102] Furthermore, as an embodiment, the self-locking clamp 10 can be fixed on the middle connecting component 9; the high-strength steel rod 11 can be fixed to the bottom connecting plate 4-2 of the lower connecting component 4 through a nut.

[0103] Specifically, as shown in FIG11 , in the embodiment, the self-locking clamp 10 in the self-resetting system includes an anchor ring 10 - 1 , a clip 10 - 2 , an O-type rubber ring 10 - 3 , a reset spring 10 - 4 and a gland assembly 10 - 5 , wherein:

[0104] The clips 10-2 are multiple pieces, built into the anchor ring 10-1 and enclosed outside the high-strength steel rod 11. A groove is reserved at the end and an O-shaped rubber ring 10-3 is provided, so that it can work stably in the gap between the anchor ring 10-1 and the high-strength steel rod 11.

[0105] The return spring 10-4 is arranged on the upper part of the clip 10-2, and the high-strength steel rod 11 passes through the return spring 10-4;

[0106] The cover assembly 10-5 is arranged on the upper part of the anchor ring 10-1 to support the return spring 10-4 and ensure axial stability during operation;

[0107] The above design enables the self-locking clamp 10 to bear the force when under tension by engaging the multiple enclosed clips 10-2 with the high-strength steel rod 11; and when under pressure, the clips 10-2 and the high-strength steel rod 11 are loosened, sliding relative to the high-strength steel rod 11 without bearing the force.

[0108] In the embodiment, the structure and working principle of the self-locking clamp are shown in Figure 11. During the energy dissipation phase, as shown in Figure 11(a) in the high-strength steel bar anchoring (load-bearing) state, the clamp 10-2 engages the high-strength steel bar 11 and bears the force, thereby stretching the energy-dissipating steel bar 8 to dissipate energy. During the reset phase, as shown in Figure 11(b) in the high-strength steel bar sliding (non-load-bearing) state, the clamp 10-2 no longer engages the high-strength steel bar, the clamp reset spring 10-4 is compressed, the high-strength steel bar 11 and the clamp 10-2 no longer bear the force, and the self-locking clamp 10 and the intermediate connecting member 9 slide toward the lower connecting member 4, preventing the energy-dissipating steel bar 8, which is in a stretched state during the energy dissipation phase, from being compressed.

[0109] In the embodiment, in order to further demonstrate the structural design of the one-way clamp force transmission low prestressed self-resetting shearing device of the present invention, a deconstruction schematic diagram as shown in Figure 13 is provided.

[0110] In order to further demonstrate the design principle of the one-way clamp force transmission low prestress requirement self-resetting shear device of the present invention, an application example is provided:

[0111] The device of the present invention can be applied in many scenarios, such as being installed between shear walls and columns, between different spans of the frame, and at the inflection point in the span of the connecting beam. According to the ductility requirements of the seismic design, the device yields before the main structure, and concentrates the deformation and energy consumption in the device of the present invention at the same time, thereby protecting the main structure. For example, but not limitation, the application scenario is to install the device of the present invention between the shear wall and the column as shown in Figure 13. Specifically, the connecting beam between the shear wall and the column is connected and installed on both sides with the left end connecting component 2 and the right connecting component 3 of the device of the present invention. In this way, the working mechanism of the device of the present invention is as follows (three stages shown in Figure 13):

[0112] 1) In the initial static state, the upper connecting member 1, lower connecting member 4, left connecting member 2, and right connecting member 3 are arranged as shown in Figures 3 and 4. The top of the movable axis of the movable nested structure formed by the left connecting member 2 and the right connecting member 3 is closely attached to the middle plate 1-4 of the upper connecting member 1. The disc spring assembly 7 is initially slightly compressed due to prestressing requirements. The energy-dissipating steel rod 8 remains stationary on the device.

[0113] 2) When shear deformation is required, that is, due to an earthquake disaster, an external force is input from a certain direction. The left connecting component 2 and the right connecting component 3 of the device are input with the external force and shift relative to each other, pushing the upper connecting component 1 and the lower connecting component 4 to undergo axial relative displacement. At this time:

[0114] The disc spring group 7 in the prestressed system is continuously compressed and stores energy in the upper cavity 1-3;

[0115] At the same time, the high-strength steel rod 11 in the self-resetting system engages with the self-locking clamp 10 (clamped state) to exert a self-locking function;

[0116] At the same time, the energy-dissipating steel rod 8 outside the upper cavity 1-3 enters the energy-dissipating mechanism, and the energy-dissipating material is stretched and deformed, and the energy is dissipated by yielding under tension;

[0117] During this period, the distance between the middle connecting member 9 and the lower connecting member 4 remains unchanged. At this time, the distance between the upper connecting member 1 and the middle connecting member 9 increases, which determines that the total length of the device L increases synchronously.

[0118] 3) Entering the critical state, when the external energy, i.e., the external force, stops inputting, or when the energy stored in the disc spring group 7 is greater than the external force, the displacement of the left connecting part 2 and the right connecting part 3 of the device begins to decrease. At this time:

[0119] The prestressed system consisting of the prestressed screw 5 and the disc spring group 7 in series will undergo a reset action due to compression;

[0120] As the prestressed system resets, the high-strength steel rod 11 and the self-locking clamp 10 in the self-resetting system perform the unlocking function and can slide relative to each other. The high-strength steel rod 11 extends out of the self-locking clamp 10. Since friction resistance is avoided during the sliding reset, a small amount of prestress can achieve the reset goal.

[0121] When fully reset, in terms of product appearance, the left connecting part 2, the right connecting part 3 and the disc spring group 7 return to their initial state, the distance between the upper connecting part 1 and the lower connecting part 4 returns to its initial state, and at the same time, the distance between the middle connecting part 9 and the lower connecting part 4 is reduced.

[0122] When in use, the one-way clamp force transmission low prestress requirement self-resetting shear device has three states: state one (initial state), state two (loaded state), and state three (reset state). Correspondingly, the reset spring 10-4 of the self-locking clamp 10 is in different degrees of compression: maintaining engagement (force transmission) to maintain and ensure stiffness; and being able to adapt to the transition from state one to state two, that is, the high-strength steel rod 11 moves with the lower end connecting component 4 (displaced away from the upper end connecting component 1).

[0123] Specifically:

[0124] State 1 (initial state): The return spring 10 - 4 is in a compressed state, exerting pressure on the clip 10 - 2 ; at this time, the clip squeezes the wedge-shaped inner wall of the anchor ring 10 - 1 and bites the high-strength steel rod 11 .

[0125] State 2 (loaded state): The return spring 10-4 is in a compressed state, exerting the same degree of pressure on the clip 10-2; the high-strength steel rod 11 tends to move downward, and the friction between the clip and the clip causes the clip to squeeze the wedge-shaped inner wall of the anchor ring 10-1 more severely than in state 1, causing the clip to continuously bite the high-strength steel rod 11.

[0126] State three (reset state): the reset spring 10-4 is still in a compressed state (the degree of compression is slightly increased); the high-strength steel rod 11 tends to move upward. At this time, the friction between the clip and the clip causes the clip to squeeze the wedge-shaped inner wall of the anchor ring 10-1 less or not at all compared to state one, causing the clip to no longer bite the high-strength steel rod 11, as shown in Figure 11.

[0127] The function of the return spring 10-4 is to prevent the high-strength steel rod from moving upward and driving the clip to move upward together.

[0128] The device of the present invention is composed of only components widely used in the engineering field, does not require fine processing of components, has low cost, reliable performance, and strong deformation ability, and can be widely used in the seismic design of new buildings and the seismic resistance of existing buildings.

[0129] The above description is only a description of the preferred embodiments of the present application and does not limit the scope of the present application. Any changes or modifications made by any person skilled in the art based on the above disclosed technical content should be regarded as equivalent valid embodiments and fall within the scope of protection of the technical solution of the present application.

Claims

1. A self-resetting shearing device with low prestressing requirement and one-way clamp force transmission, characterized in that: include: A replaceable energy dissipation system, a self-resetting prestressing system, and a bracket and a transmission mechanism for installing the energy dissipation system and the self-resetting prestressing system; the three form an integrated body, and are connected to the outside to introduce energy through the bracket and the transmission mechanism; When the device undergoes shear deformation, the energy dissipation system therein yields under tension, while the prestressed screw in the self-resetting prestressed system elastically deforms under tension and the disc spring group elastically deforms under compression, and the reset is completed through the restoring force generated by the deformation of the self-resetting prestressed system during the shear deformation process.

2. The one-way clamp force transmission low prestress requirement self-resetting shearing device according to claim 1, characterized in that: The support and transmission mechanism comprise an upper connecting component (1), an intermediate connecting component (9), and a lower connecting component (4), which together constitute a support for installing the self-resetting prestressing system and the energy dissipation system; wherein the two end surfaces of the upper connecting component (1) and the lower connecting component (4) determine the initial length L of the shear energy dissipation device before separation in the length direction; It also includes a left end connecting component (2) and a right end connecting component (3), which together form a movable nesting structure; the movable nesting structure is located between the upper end connecting component (1) and the middle connecting component (9), and extends through the wing portion, and is used to input external shear dislocation and introduce energy; The movable shaft of the movable nesting structure is arranged in the cavity of the upper connecting component (1), and the two wings extend from the side wall of the cavity. The upper and lower ends of the movable shaft are in rigid contact with the upper connecting component (1) and the lower connecting component (4) respectively. After input shear dislocation, the movable nesting structure slides against each other in the axial direction, thereby pushing the upper connecting component (1) and the lower connecting component (4) to be relatively separated.

3. The one-way clamp force transmission low prestress requirement self-resetting shearing device according to claim 2, characterized in that: The upper end connecting component (1) has a main body which is a hollow cylinder, and the hollow cylinder is divided into two upper and lower open cavities by an intermediate plate (1-4), wherein a top connecting plate (1-1) is fixed at the top opening of the upper cavity (1-2), and the lower cavity (1-3) has an open bottom and side walls symmetrically grooved along the central axis of the cavity; The lower end connecting component (4) comprises a cylindrical rod (4-1) and a bottom connecting plate (4-2) fixed to the bottom of the cylindrical rod (4-1); The middle connecting member (9) has an opening in the center for the lower cavity (1-3) of the upper connecting member (1) to pass through; The movable nested structure comprises a left-end connecting component (2) and a right-end connecting component (3), and takes the insertion of the right-end connecting component (3) into the left-end connecting component (2) as an example; The left end connecting component (2) comprises a first cylinder (2-1) with a grooved side wall and a first wing (2-2), wherein the first wing (2-2) is fixed to the outer wall of the first cylinder (2-1), and the side wall of the first cylinder (2-1) is provided with a groove; The right end connecting component (3) comprises a second cylinder (3-1) and a second wing (3-2), and the second wing (3-2) is fixed to the outer wall of the second cylinder (3-1); The first cylinder (2-1) and the second cylinder (3-1) have the same height; The second cylinder (3-1) is placed inside the first cylinder (2-1) to form a movable shaft body of a movable nested structure, and the second wing portion (3-2) extends from a groove on the side wall of the first cylinder (2-1), thereby forming a pair of wing portions of the movable nested structure with the first wing portion (2-2) on the other side of the movable shaft body; Conversely, the positions of the left and right end connecting parts are interchanged, and vice versa.

4. The one-way clamp force transmission low prestress requirement self-resetting shearing device according to claim 3, characterized in that: In the axial direction, i.e., the length direction, the movable nesting structure is placed in the lower cavity (1-3) of the upper connecting component (1), and the first wing (2-2) and the second wing (3-2) respectively extend from the slots on both sides of the lower cavity (1-3) for connection to the outside; the top of the movable shaft body of the movable nesting structure is in rigid contact with the middle plate (1-4) of the upper connecting component (1), and the bottom of the movable shaft body is placed on the top of the cylindrical rod (4-1) of the lower connecting component (4) and in rigid contact; the movable shaft body and the cylindrical rod (4-1) overlapped up and down are inserted together and limited in the lower cavity (1-3); under the input of external energy, the movable nesting structure slides against each other in the axial direction to promote the relative displacement of the upper connecting component (1) and the lower connecting component (4).

5. The one-way clamp force transmission low prestress requirement self-resetting shearing device according to claim 3, characterized in that: Width W of the first wing (2-2) 2,2 The width W3 of the second wing (3-2) must be smaller than the slot width W1 of the lower cavity (1-3) of the upper connecting component (1), and the width W3 of the second wing (3-2) must also be smaller than the slot width W1 of the first cylinder (2-1) of the left connecting component (2). 2,1 The slot width W1 of the lower cavity (1-3) of the upper connecting component (1) is such as to ensure that the left connecting component (2) and the right connecting component (3) can shift relative to each other in the lower cavity (1-3).

6. The one-way clamp force transmission low prestress requirement self-resetting shearing device according to claim 3, characterized in that: The sum of the height H4 of the cylindrical rod (4-1) and the height H2 of the movable shaft body needs to be slightly greater than the height H1 of the lower cavity (1-3) of the upper end connecting component, and twice the height H2 of the movable shaft body needs to be less than the height H1 of the lower cavity (1-3), satisfying the following relationship:.

7. The one-way clamp force transmission low prestress requirement self-resetting shearing device according to claim 3, characterized in that: The energy dissipation system comprises two or more energy dissipation steel bars (8); The upper and lower ends of the energy-absorbing steel rod (8) are respectively fixed to the top connecting plate (1-1) of the upper connecting component (1) and the middle connecting component (9).

8. The one-way clamp force transmission low prestress requirement self-resetting shearing device according to claim 7, characterized in that: The self-resetting prestressing system comprises a prestressing system and a self-resetting system: The prestressed system comprises a prestressed screw (5), a disc spring baffle (6) and a disc spring group (7), wherein the disc spring baffle (6) is arranged at the top of the disc spring group (7); the disc spring group (7) is composed of a plurality of disc springs connected in parallel, and the disc spring group (7) and the disc spring baffle (6) are arranged together in an upper cavity (1-2) of an upper connecting component (1); a through hole is reserved in the center of the top connecting plate (1-1) of the upper connecting component (1), the second cylinder (3-1) of the right connecting component (3), the cylindrical rod (4-1) of the lower connecting component (4) and the bottom connecting plate (4-2) of the lower connecting component (4); the upper end of the prestressed screw (5) is fixed to the disc spring baffle (6), passes through the spring group (7) and the through holes of each connecting component in turn, and is then fixed to the bottom connecting plate (4-2); The self-resetting system comprises a self-locking clamp (10) and a high-strength steel rod (11); the self-locking clamp (10) is fixed on the middle connecting component (9), and the high-strength steel rod (11) is arranged between the middle connecting component (9) and the lower connecting component (4); specifically, the upper end of the high-strength steel rod (11) is connected to the self-locking clamp (10), and the lower end of the high-strength steel rod (11) is fixed on the bottom connecting plate (4-2) of the lower connecting component (4), together forming a one-way force transmission element.

9. The one-way clamp force transmission low prestress requirement self-resetting shearing device according to claim 8, characterized in that: The self-locking clamp (10) in the self-resetting system comprises an anchor ring (10-1), a clamping piece (10-2), an O-type rubber ring (10-3), a reset spring (10-4) and a gland assembly (10-5), wherein: The clamping pieces (10-2) are multiple pieces, which are built into the anchor ring (10-1) and enclosed outside the high-strength steel rod (11). A groove is reserved at the end thereof and an O-type rubber ring (10-3) is provided, so that the clamping pieces (10-2) can work stably in the gap cavity between the anchor ring (10-1) and the high-strength steel rod (11). The return spring (10-4) is arranged on the upper part of the clamp (10-2), and the high-strength steel rod (11) passes through the return spring (10-4); The cover assembly (10-5) is arranged on the upper part of the anchor ring (10-1) and is used to support the return spring (10-4) to ensure axial stability during operation; When under tension, the self-locking clamp (10) bears force by engaging the multiple enclosed clamping pieces (10-2) with the high-strength steel rod (11); and when under pressure, the clamping pieces (10-2) and the high-strength steel rod (11) are loosened, causing relative sliding with the high-strength steel rod (11) without bearing force.

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