A self-resetting shear-resistant device with low prestress requirement for unidirectional clamp force transmission

Abstract

This invention proposes a unidirectional clamping force-transmitting self-resetting shear-resistant device with low prestress requirements. It includes a replaceable energy-dissipating system, a self-resetting prestressing system, and a support and transmission mechanism for external connection and energy input, forming an integrated unit. Energy is introduced externally through the support and transmission mechanism. When shear deformation occurs, the energy-dissipating system undergoes tensile yielding deformation, while the self-resetting prestressing system undergoes compressive deformation. Resetting is achieved through the restoring force generated by the compressive deformation of the self-resetting prestressing system during loading. This invention requires no component precision machining, is inexpensive, and offers stable and reliable performance. It solves the problems of requiring high-level prestress and limited deformation capacity in self-resetting energy-dissipating devices, requiring only a small amount of prestress to achieve complete self-resetting. The energy-dissipating components are located on the periphery, allowing for replacement without disassembling the entire device after an earthquake, enabling rapid repair.

Description

Technical Field

[0001] This invention is used for seismic design of new buildings and seismic reinforcement of existing buildings. Background Technology

[0002] Energy-dissipating shear-resistant devices have many applications, such as installation between shear walls and columns, between different spans of frames, and at the mid-span inflection points of coupling beams. Based on the ductility requirements of seismic design, this type of device yields before the main structure, concentrating deformation and energy dissipation simultaneously within the device, thus protecting the main structure.

[0003] Based on different energy dissipation principles, many energy-dissipating shear-resistant devices exist, such as viscoelastic, mild steel, friction, lead-rubber, mild steel-viscoelastic composite, and lead-rubber types. These traditional energy-dissipating shear-resistant devices have strong energy dissipation capabilities, but large residual displacements after earthquakes result in slow recovery of the structure's functionality. Self-resetting energy-dissipating shear-resistant devices, while possessing highly efficient energy dissipation capabilities, can automatically restore the structure to its normal state, solving the problem of large residual displacements after earthquakes inherent in traditional energy-dissipating shear-resistant devices.

[0004] There is relatively little research on self-resetting energy-dissipating shear devices; and known self-resetting energy-dissipating shear devices all require the application of high prestress to overcome the frictional resistance of their own energy-dissipating system to achieve self-resetting. However, the requirement to apply high levels 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, this invention proposes a unidirectional clamp-driven, low-prestress-requirement self-resetting shear-resistant device. This device utilizes a high-strength steel bar and a self-locking clamp to achieve relative sliding during the device's reset process, eliminating the frictional resistance of the energy dissipation system and enabling complete reset with minimal prestress. This novel device provides both energy dissipation and self-resetting capabilities during shear deformation; it requires only a small amount of prestress to achieve complete reset; and it features strong deformation capacity, low cost, reliable performance, and easy replacement of energy dissipation components after an earthquake.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A unidirectional clamp force transmission low prestress requirement self-resetting shear-resistant device 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 unit, which is connected to external energy input through the bracket and transmission mechanism; when the device undergoes shear deformation (loading), the energy dissipation system undergoes tensile yield deformation, while the prestressing screw in the self-resetting prestressing system undergoes tensile elastic deformation and the disc spring assembly undergoes compressive elastic deformation, and the device completes the reset through the restoring force generated by the deformation of the self-resetting prestressing system during shear deformation (loading).

[0008] The bracket and transmission mechanism include an upper connecting component 1, a middle connecting component 9, and a lower connecting component 4, which together form a bracket for installing the self-resetting prestressing system and the energy dissipation system; wherein, the two end faces 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.

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

[0010] The movable shaft of the movable nested structure is disposed in the cavity of the upper connecting component 1, with two wings extending 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 shearing misalignment, the movable nested structure slides axially upwards towards each other, thereby pushing the upper connecting component 1 and the lower connecting component 4 to separate relative to each other.

[0011] Specifically, the upper connecting component 1 is a hollow cylinder. The hollow cylinder is divided into upper and lower open cavity bodies by the middle plate 1-4. The top connecting plate 1-1 is fixed at the top opening of the upper cavity body 1-2, and the bottom opening of the lower cavity body 1-3 is open and the side wall is symmetrically slotted along the central axis of the cavity.

[0012] 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;

[0013] The intermediate connecting component 9 has an opening in the center for the lower cavity 1-3 of the upper connecting component 1 to pass through;

[0014] The active nested structure includes a left-end connecting component 2 and a right-end connecting component 3, with the right-end connecting component 3 inserted into the left-end connecting component 2 as an example.

[0015] The left end connecting component 2 includes a first cylinder 2-1 with a slotted 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 slot.

[0016] The right-end connecting component 3 includes a second cylinder 3-1 and a second wing 3-2, with the second wing 3-2 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 shaft in a movable nesting structure. The second wing 3-2 extends from the slot in the side wall of the first cylinder 2-1, thus forming a pair of wings in a movable nesting structure with the first wing 2-2 on the other side of the movable shaft.

[0019] Conversely, the same applies if the positions of the connecting parts at the left and right ends are interchanged.

[0020] In the axial direction, i.e. the length direction, the movable nested structure is placed in the lower cavity 1-3 of the upper connecting component 1. The first wing 2-2 and the second wing 3-2 extend from the slots on both sides of the lower cavity 1-3 to connect to the outside. The top of the movable shaft of the movable nested structure is in rigid contact with the middle plate 1-4 of the upper connecting component 1, and the bottom of the movable shaft is placed on the top of the cylindrical rod 4-1 of the lower connecting component 4 and is in rigid contact. The upper and lower movable shaft and the cylindrical rod 4-1 are inserted together and confined in the lower cavity 1-3. Under the input of external energy, the movable nested structure slides axially upward to push the upper connecting component 1 and the lower connecting component 4 to move relative to each other.

[0021] Furthermore, the width W2,2 of the first wing 2-2 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 be smaller than both the slot width W2,1 of the first cylinder 2-1 of the left connecting component 2 and the slot width W1 of the lower cavity 1-3 of the upper connecting component 1, to ensure that the left connecting component 2 and the right connecting component 3 can move relative to each other within 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 greater than the height H1 of the lower cavity 1-3 of the upper connecting component. In order for the cylindrical rod 4-1 to always be within the lower cavity 1-3 of the upper connecting component 1 during operation, twice the height H2 of the movable shaft needs to be less than the height H1 of the lower cavity 1-3, satisfying the following relationship: .

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

[0024] The upper and lower ends of the energy-consuming 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.

[0025] Specifically, the energy-consuming steel bar 8 is divided into three sections: the middle part is the core energy-consuming section 8-1, and the upper and lower parts are the connecting sections 8-2. The core energy-consuming section 8-1 will yield and consume energy when under tension, while the connecting section 8-2 has a larger diameter to ensure that it will not yield during loading.

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

[0027] The prestressing system includes a prestressing screw 5, a disc spring baffle 6, and a disc spring assembly 7. The disc spring baffle 6 is located at the top of the disc spring assembly 7. The disc spring assembly 7 is composed of multiple disc springs connected in parallel. The disc spring assembly 7 and the disc spring baffle 6 are located 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 all have through holes pre-drilled in the center. The upper end of the prestressing screw 5 is fixed to the disc spring baffle 6, passes through the disc spring assembly 7 and the through holes of each connecting component in sequence, and is then 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 disposed 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 unidirectional force transmission element.

[0029] Specifically, the self-locking clamp 10 in the self-resetting system includes an anchor ring 10-1, clamping pieces 10-2, O-rings 10-3, a return spring 10-4, and a pressure cap assembly 10-5. The clamping pieces 10-2 are multiple pieces, built into the anchor ring 10-1, surrounding the high-strength steel rod 11. Their ends have pre-drilled grooves and are fitted with O-rings 10-3, allowing them to work stably within the gap between the anchor ring 10-1 and the high-strength steel rod 11. The return spring 10-4... 4 is located on the upper part of the clamping piece 10-2, and the high-strength steel rod 11 passes through the return spring 10-4; the cover assembly 10-5 is located on the upper part of the anchor ring 10-1 to hold the return spring 10-4 and stabilize it axially during operation; when under tension, the self-locking clamp 10 bears the force by the interlocking of the multiple clamping pieces 10-2 and the high-strength steel rod 11; when under pressure, the clamping pieces 10-2 and the high-strength steel rod 11 are released, and relative sliding occurs between them without bearing the force.

[0030] Furthermore, in the bracket and 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 prestressing system, the prestressing screw 5 is fixed to the disc spring baffle 6 and the bottom connecting plate 4-2 of the lower connecting component 4 by bolts; the self-locking clamp 10 can be fixed to the intermediate connecting component 9 by welding; the high-strength steel rod 11 can be fixed to the bottom connecting plate 4-2 of the lower connecting component 4 by nuts.

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

[0033] The working mechanism of the unidirectional clamp force transmission low prestress requirement self-resetting shear-resistant device is as follows:

[0034] 1) In the initial static state, the top of the movable shaft of the movable nested structure formed by 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-consuming 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 part 2 and the right connecting part 3 of the device are subjected to the external force and move relative to each other, pushing the upper connecting part 1 and the lower connecting part 4 to undergo axial relative displacement. At this time:

[0036] This causes the disc spring assembly 7 in the prestressed system to be continuously compressed and store energy within the upper cavity 1-3;

[0037] Meanwhile, the high-strength steel bar 11 in the self-resetting system engages with the self-locking clamp 10 to perform the self-locking function;

[0038] At the same time, the energy-consuming steel rod 8 outside the upper cavity 1-3 enters the energy-consuming mechanism, and the energy-consuming material is stretched and deformed, and then yields under tension to consume energy.

[0039] 3) Entering a critical state: When external energy (i.e., external force) stops being input, or when the energy stored in disc spring assembly 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 assembly 7 connected in series will undergo a reset action due to compression;

[0041] During the reset process of the prestressed system, the high-strength steel bar 11 and the self-locking clamp 10 in the self-reset system unlock each other and slide relative to each other, with the high-strength steel bar 11 extending out of the self-locking clamp 10.

[0042] The beneficial effects of this invention are:

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

[0044] (2) It solves the problems of high-level prestress and limited deformation capacity required for self-resetting energy dissipation devices;

[0045] (3) Only a small amount of prestress is required to achieve complete self-resetting 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, so that the device can be repaired quickly. Attached Figure Description

[0047] Figure 1 This is a structural diagram of the self-resetting shear-resistant device for unidirectional clamp force transmission with low prestress requirements according to the present invention;

[0048] Figure 2 This is a cross-sectional view of the self-resetting shear-resistant device for unidirectional clamp force transmission with low prestress requirements of the present invention.

[0049] Figure 3 This is a structural diagram of the connecting components of the support and transmission mechanism;

[0050] Figure 4 This is a cross-sectional view of the connecting components of the support and transmission mechanism;

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

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

[0053] Figure 7 This is a structural diagram of the left and right connecting parts;

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

[0055] Figure 9 A schematic diagram showing the connection of the disc spring assembly to the disc spring baffle;

[0056] Figure 10 Schematic diagram of energy-consuming steel bars;

[0057] Figure 11 This is a schematic diagram showing the structure and state of the self-locking clamp in the example.

[0058] Figure 12 This is a schematic diagram of the self-resetting shear-resistant device for unidirectional clamp force transmission with low prestress requirements according to the present invention.

[0059] Figure 13 This is a schematic diagram illustrating the application scenario of the device in the embodiment;

[0060] Figure 14 This describes the deformation and energy dissipation mechanism of the device in the embodiment.

[0061] Explanation of the labels in the diagram:

[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 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, and 7 is the disc spring assembly.

[0067] 8 represents the energy-consuming steel bar, 8-1 represents the core energy-consuming section, and 8-2 represents the connecting section;

[0068] 9 represents the intermediate connecting component;

[0069] 10 is a self-locking clamp, 10-1 is an anchor ring, 10-2 is a clamping piece, 10-3 is an O-ring, 10-4 is a clamp return spring, and 10-5 is a pressure cap assembly;

[0070] 11 is a high-strength steel bar. Detailed Implementation

[0071] The technical solutions provided in this application will be further described below with reference to specific embodiments and accompanying drawings. The advantages and features of this application will become clearer from the following description.

[0072] It should be noted that the embodiments of this application are preferred for implementation and are not intended to limit the application in any way. The technical features or combinations of technical features described in the embodiments of this application should not be considered isolated; they can be combined with each other to achieve better technical effects. The scope of the preferred embodiments of this application may also include other implementations, and this should be understood by those skilled in the art to which the embodiments of this application pertain.

[0073] Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, 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 as limiting. Therefore, other examples of exemplary embodiments may have different values.

[0074] The accompanying drawings in this application are all in a very simplified form and use non-precise proportions, intended only to facilitate and clarify the illustration of the embodiments of this application, and are not intended to limit the implementation of this application. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes achieved by this application, should fall within the scope of the technical content disclosed in this application. Furthermore, the same reference numerals appearing in the various drawings of this application represent the same features or components, and can be applied to different embodiments.

[0075] This invention proposes a unidirectional clamp force transmission, low prestress requirement, self-resetting shear-resistant device, the structure of which is as follows: Figure 1 and Figure 2 As shown, it 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 unit, which is connected to external energy input through the bracket and transmission mechanism; in terms of functional relationship, when the device undergoes shear deformation (loading), the energy dissipation system undergoes tensile yield deformation, while the prestressing screw in the self-resetting prestressing system undergoes tensile elastic deformation and the disc spring assembly undergoes compressive elastic deformation, and the reset is completed by the restoring force generated by the deformation of the self-resetting prestressing system during shear deformation (loading).

[0076] like Figure 3 , Figure 4 As shown, the bracket and transmission mechanism include an upper connecting component 1, a middle connecting component 9, and a lower connecting component 4, which together form a bracket for installing the self-resetting prestressing system and the energy dissipation system; wherein, the two end faces 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;

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

[0078] The movable shaft of the movable nested structure is disposed in the cavity of the upper connecting component 1, with two wings extending 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 shearing misalignment, the movable nested structure slides axially upwards towards each other, thereby pushing the upper connecting component 1 and the lower connecting component 4 to separate relative to each other.

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

[0080] like Figure 5 , Figure 6 As shown, the upper connecting component 1 is a hollow cylinder. The hollow cylinder is divided into two open cavity bodies by the middle plate 1-4. The top connecting plate 1-1 is fixed at the top opening of the upper cavity body 1-2, and the bottom opening of the lower cavity body 1-3 is open and the side wall is symmetrically slotted along the central axis of the cavity.

[0081] like Figure 8 As shown, the lower 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 intermediate connecting component 9.

[0083] like Figure 7 As shown, the movable nested structure formed by the left-end connecting component 2 and the right-end connecting component 3 is described with the example of the right-end connecting component 3 being inserted into the left-end connecting component 2:

[0084] The left end connecting component 2 includes a first cylinder 2-1 with a slotted 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 slot.

[0085] The right-end connecting component 3 includes a second cylinder 3-1 and a second wing 3-2, with the second wing 3-2 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 shaft in a movable nesting structure. The second wing 3-2 extends from the slot in the side wall of the first cylinder 2-1, thus forming a pair of wings in a movable nesting structure with the first wing 2-2 on the other side of the movable shaft.

[0088] Conversely, the same applies if the positions of the connecting parts at the left and right ends are interchanged.

[0089] Furthermore, in the axial direction, i.e. the length direction, the movable nested structure is placed in the lower cavity 1-3 of the upper connecting component, 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 of the movable nested structure is in rigid contact with the intermediate plate 1-4, and the bottom of the movable shaft is placed on the top of the cylindrical rod 4-1 and in rigid contact; the upper and lower stacked movable shaft and cylindrical rod 4-1 are inserted together and confined in the lower cavity 1-3.

[0090] Under external energy input, the active nested structure slides axially upwards to push the upper connecting part 1 and the lower connecting part 4 to undergo relative displacement.

[0091] Furthermore, the width W2,2 of the first wing 2-2 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 be smaller than both the slot width W2,1 of the first cylinder 2-1 of the left connecting component 2 and the slot width W1 of the lower cavity 1-3 of the upper connecting component 1, to ensure that the left connecting component 2 and the right connecting component 3 can move relative to each other within 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 greater than the height H1 of the lower cavity 1-3 of the upper connecting component. In order for the cylindrical rod 4-1 to always be within the lower cavity 1-3 of the upper connecting component 1 during operation, twice the height H2 of the movable shaft needs to be less than the height H1 of the lower cavity 1-3, satisfying the following relationship: .

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

[0094] The upper and lower ends of the energy-consuming 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.

[0095] When in use, the energy-consuming steel bar 8 is a consumable and can be replaced.

[0096] Specifically, such as Figure 10 As shown, the energy-consuming steel bar 8 is divided into three sections: the middle part is the core energy-consuming section 8-1, and the upper and lower parts are the connecting sections 8-2. The core energy-consuming section 8-1 will yield and consume energy when under 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-consuming steel rod 8 is threaded, and the upper and lower ends of the energy-consuming steel rod 8 can be fixed to the top connecting plate 1-1 of the upper 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 transmission mechanism:

[0099] Among them, such as Figure 1 , Figure 9 As shown, the prestressed system includes a prestressed screw 5, a disc spring baffle 6, and a disc spring assembly 7. The disc spring baffle 6 is located at the top of the disc spring assembly 7. The disc spring assembly 7 is composed of multiple disc springs connected in parallel. The disc spring assembly 7 and the disc spring baffle 6 are located 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 all have through holes pre-drilled in the center. The upper end of the prestressed screw 5 is fixed to the disc spring baffle 6, passes through the disc spring assembly 7 and the through holes of each connecting component in sequence, and is then fixed to the bottom connecting plate 4-2.

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

[0101] 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 disposed between the intermediate connecting component 9 and the lower connecting component 4, as shown below. Figure 1 As shown; specifically, the upper end of the high-strength steel bar 11 is connected to the self-locking clamp 10, and the lower end of the high-strength steel bar 11 is fixed to the bottom connecting plate 4-2 of the lower end connecting component 4, together forming a unidirectional force transmission element.

[0102] Furthermore, as an embodiment, the self-locking clamp 10 can be fixed to the intermediate 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 by a nut.

[0103] Specifically, such as Figure 11 As shown in the embodiment, the self-locking clamp 10 in the self-resetting system includes an anchor ring 10-1, a clamping piece 10-2, an O-ring 10-3, a reset spring 10-4, and a pressure cap assembly 10-5, wherein...

[0104] The clip 10-2 consists of multiple pieces, which are built into the anchor ring 10-1 and surround the high-strength steel bar 11. The end of the clip is reserved with a groove and equipped with an O-ring rubber ring 10-3, so that it can work stably in the gap cavity between the anchor ring 10-1 and the high-strength steel bar 11.

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

[0106] The cover assembly 10-5 is disposed on the upper part of the anchor ring 10-1 to hold the return spring 10-4 and stabilize the axis during operation.

[0107] The above design allows the self-locking clamp 10 to bear force when under tension by engaging with the high-strength steel bar 11 through multiple clamping plates 10-2; while under compression, the clamping plates 10-2 loosen from the high-strength steel bar 11 and slide relative to the high-strength steel bar 11 without bearing force.

[0108] In the embodiments, the self-locking fixture's structure and working principle are as follows: Figure 11 The device of this invention, during the energy-consuming phase, such as... Figure 11 (a) shows the anchorage (load-bearing) state of the high-strength steel bar: the clamping piece 10-2 will engage the high-strength steel bar 11 and bear the load, thereby stretching the energy-dissipating steel bar 8 to dissipate energy; while in the reset phase, as Figure 11 (b) shows the sliding (non-load-bearing) state of the high-strength steel bar: the clamp 10-2 no longer engages with the high-strength steel bar, the clamp return spring 10-4 is compressed, the high-strength steel bar 11 and the clamp 10-2 are not under load, and the self-locking clamp 10 and the intermediate connecting part 9 slide towards the lower connecting part 4 to avoid the energy-consuming steel bar 8, which is in a tensile state during the energy-consuming stage, being compressed.

[0109] In the embodiments, to further demonstrate the structural design of the unidirectional clamp force transmission low prestress self-resetting anti-shear device of the present invention, the following is provided: Figure 13 The diagram shown is a structural representation.

[0110] To further demonstrate the design principle of the unidirectional clamp force transmission low prestress requirement self-resetting shear-resistant device of the present invention, application examples are provided:

[0111] The device of this invention has many applications, such as installation between shear walls and columns, between different spans of a frame, and at the mid-span inflection point of a connecting beam. Based on the ductility requirements of seismic design, the device yields before the main structure, concentrating deformation and energy dissipation simultaneously within the device, thus protecting the main structure. These are examples, not limitations; application scenarios include... Figure 13 The device of the present invention is installed between a shear wall and a column, specifically through a connecting beam between the shear wall and the column, which connects to the left connecting component 2 and the right connecting component 3 of the device on both sides. Thus, the working mechanism of the device of the present invention is as follows (…). Figure 13 (The three stages shown)

[0112] 1) In the initial static state, the arrangement of the upper connecting component 1, the lower connecting component 4, the left connecting component 2, and the right connecting component 3 is as follows: Figure 3 , Figure 4As shown, the top of the movable shaft of the movable nested structure, consisting of the left connecting part 2 and the right connecting part 3, is tightly attached to the middle plate 1-4 of the upper connecting part 1; the disc spring assembly 7 is in a slightly compressed state in the initial state due to the prestress requirement. The energy-dissipating steel rod 8 remains stationary on the device.

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

[0114] This causes the disc spring assembly 7 in the prestressed system to be continuously compressed and store energy within the upper cavity 1-3;

[0115] Meanwhile, the high-strength steel bar 11 in the self-resetting system engages with the self-locking clamp 10 (clamped state) to perform the self-locking function;

[0116] At the same time, the energy-consuming steel rod 8 outside the upper cavity 1-3 enters the energy-consuming mechanism, and the energy-consuming material is stretched and deformed, and then yields under tension to consume energy.

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

[0118] 3) Entering a critical state: When external energy (i.e., external force) stops being input, or when the energy stored in disc spring assembly 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 assembly 7 connected in series will undergo a reset action due to compression;

[0120] During the reset process of the prestressed system, the high-strength steel bar 11 and the self-locking clamp 10 in the self-resetting system play an unlocking function and can slide relative to each other. The high-strength steel bar 11 extends out of the self-locking clamp 10. Since frictional resistance is avoided during the sliding reset, a small amount of prestress is sufficient to achieve the reset target.

[0121] When fully reset, the left connecting component 2, the right connecting component 3, and the disc spring assembly 7 return to their initial state in terms of product appearance. The distance between the upper connecting component 1 and the lower connecting component 4 returns to its initial state, while the distance between the middle connecting component 9 and the lower connecting component 4 decreases.

[0122] In application, the unidirectional clamp force transmission low prestress requirement self-resetting anti-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 exists) to maintain and ensure stiffness; and can adapt to the transition from state one to state two, that is, the high-strength steel bar 11 moves together with the lower connecting part 4 (displaces away from the upper connecting part 1).

[0123] Specifically:

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

[0125] State 2 (Loading State): The return spring 10-4 is in a compressed state, applying the same pressure to the clamping plate 10-2; the high-strength steel bar 11 has a tendency to move downwards, and the friction between it and the clamping plate makes the clamping plate squeeze the wedge-shaped inner wall of the anchor ring 10-1 more severely than in State 1, causing the clamping plate to continuously bite the high-strength steel bar 11.

[0126] State 3 (Reset State): The reset spring 10-4 remains in a compressed state (the degree of compression is slightly increased); the high-strength steel bar 11 tends to move upwards. At this time, the friction between the bar and the clamping plate reduces or eliminates the clamping pressure on the wedge-shaped inner wall of the anchor ring 10-1 compared to State 1, causing the clamping plate to no longer engage with the high-strength steel bar 11. Figure 11 As shown.

[0127] The function of the return spring 10-4 is to prevent the clamping plate from moving upward along with the high-strength steel bar when it moves upward.

[0128] The device of this invention uses only components widely used in the engineering field, requires no precision machining of components, is inexpensive, has reliable performance, and strong deformation capacity, and can be widely used in seismic design of new buildings and seismic resistance of existing buildings.

[0129] The above description is merely a description of preferred embodiments of this application and is not intended to limit the scope of this application in any way. Any changes or modifications made by those skilled in the art based on the above-disclosed technical content should be considered as equivalent and valid embodiments and fall within the scope of protection of the technical solution of this application.

Claims

1. A unidirectional clamp force transmission device with low prestress requirement and self-resetting shear resistance, characterized in that, include: 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 unit, which is connected to external energy input through the bracket and transmission mechanism; When the device undergoes shear deformation, the energy dissipation system undergoes tensile yield deformation, while the prestressed screw in the self-resetting prestressing system undergoes tensile elastic deformation and the disc spring assembly undergoes compressive elastic deformation. The device then completes the reset process through the restoring force generated by the deformation of the self-resetting prestressing system during shear deformation. The bracket and transmission mechanism include an upper connecting component (1), a middle connecting component (9), and a lower connecting component (4), which together form a bracket for installing the self-resetting prestressing system and the energy dissipation system; wherein, the two end faces 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 an active nested structure; the active nested structure is located between the upper connecting component (1) and the middle connecting component (9), and extends through the wing to input external shear displacement and introduce energy; The movable shaft of the movable nested structure is set 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 shearing misalignment, the movable nested structure slides upward in the axial direction, thereby pushing the upper connecting component (1) and the lower connecting component (4) to separate relative to each other.

2. The unidirectional clamp force transmission low prestress self-resetting shear-resistant device as described in claim 1, characterized in that, The upper connecting component (1) is a hollow cylinder. The hollow cylinder is divided into upper and lower open cavity bodies by the middle plate (1-4). The upper cavity body (1-2) has a top connecting plate (1-1) fixed at the top opening. The lower cavity body (1-3) has an opening at the bottom and the side walls are symmetrically slotted along the central axis of the cavity. The lower 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). The intermediate connecting component (9) has an opening in the center for the lower cavity (1-3) of the upper connecting component (1) to pass through; The active nested structure includes a left-end connecting component (2) and a right-end connecting component (3), taking 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) includes a first cylinder (2-1) with a slotted 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 slot. The right-end connecting component (3) includes a second cylinder (3-1) and a second wing (3-2), with the second wing (3-2) fixed to the outer wall of the second cylinder (3-1); The first cylinder (2-1) and the second cylinder (3-1) are at the same height; The second cylinder (3-1) is placed inside the first cylinder (2-1) to form a movable shaft of a movable nesting structure. The second wing (3-2) extends from the slot in the side wall of the first cylinder (2-1), thus forming a pair of wings of a movable nesting structure with the first wing (2-2) on the other side of the movable shaft. Conversely, the same applies if the positions of the connecting parts at the left and right ends are interchanged.

3. The unidirectional clamp force transmission low prestress self-resetting shear-resistant device as described in claim 2, characterized in that, In the axial direction, i.e. the length direction, the movable nested structure is placed in the lower cavity (1-3) of the upper connecting component (1). The first wing (2-2) and the second wing (3-2) extend from the slots on both sides of the lower cavity (1-3) to connect to the outside. The top of the movable shaft of the movable nested structure is in rigid contact with the middle plate (1-4) of the upper connecting component (1), and the bottom of the movable shaft is placed on the top of the cylindrical rod (4-1) of the lower connecting component (4) and in rigid contact. The movable shaft and the cylindrical rod (4-1) stacked on top of each other are inserted together and confined in the lower cavity (1-3). Under the input of external energy, the movable nested structure slides axially upward to push the upper connecting component (1) and the lower connecting component (4) to undergo relative displacement.

4. The unidirectional clamp force transmission low prestress self-resetting shear-resistant device as described in claim 2, characterized in that, The width W2,2 of the first wing (2-2) must be less than the slot width W1 of the lower cavity (1-3) of the upper connecting member (1), and the width W3 of the second wing (3-2) must be less than both the slot width W2,1 of the first cylinder (2-1) of the left connecting member (2) and the slot width W1 of the lower cavity (1-3) of the upper connecting member (1), so as to ensure that the left connecting member (2) and the right connecting member (3) can move relative to each other in the lower cavity (1-3).

5. The unidirectional clamp force transmission low prestress self-resetting shear-resistant device as described in claim 2, characterized in that, The sum of the height H4 of the cylindrical rod (4-1) and the height H2 of the movable shaft must be slightly greater than the height H1 of the lower cavity (1-3) of the upper connecting component, and twice the height H2 of the movable shaft must be less than the height H1 of the lower cavity (1-3), satisfying the following relationship: .

6. The unidirectional clamp force transmission low prestress self-resetting shear-resistant device as described in claim 2, characterized in that, The energy-consuming system includes two or more energy-consuming steel bars (8); The upper and lower ends of the energy-consuming 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).

7. The unidirectional clamp force transmission low prestress self-resetting shear-resistant device as described in claim 6, characterized in that, The self-resetting prestressing system includes a prestressing system and a self-resetting system: The prestressing system includes a prestressing screw (5), a disc spring baffle (6), and a disc spring assembly (7). The disc spring baffle (6) is located at the top of the disc spring assembly (7). The disc spring assembly (7) is composed of multiple disc springs connected in parallel. The disc spring assembly (7) and the disc spring baffle (6) are both located 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) all have through holes in their centers. The upper end of the prestressing screw (5) is fixed to the disc spring baffle (6), passes through the disc spring assembly (7) and the through holes of each connecting component in sequence, and is then fixed to the bottom connecting plate (4-2). 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 disposed 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 on the bottom connecting plate (4-2) of the lower connecting component (4), together forming a unidirectional force transmission element.

8. The unidirectional clamp force transmission low prestress self-resetting shear-resistant device as described in claim 7, characterized in that, The self-locking clamp (10) in the self-resetting system includes an anchor ring (10-1), a clamping piece (10-2), an O-ring (10-3), a return spring (10-4), and a pressure cap assembly (10-5), wherein, The clip (10-2) consists of multiple pieces, which are built into the anchor ring (10-1) and surround the outside of the high-strength steel bar (11). The end of the clip has a pre-reserved groove and is equipped with an O-ring (10-3) so that it can work stably in the gap cavity between the anchor ring (10-1) and the high-strength steel bar (11). The return spring (10-4) is located on the upper part of the clamping plate (10-2), and the high-strength steel rod (11) passes through the return spring (10-4). The cover assembly (10-5) is located on the upper part of the anchor ring (10-1) and is used to hold the return spring (10-4) in place, thereby stabilizing the axis during operation. When under tension, the self-locking clamp (10) bears the force by interlocking with the high-strength steel bar (11) through multiple enclosing clamping plates (10-2); while under compression, the clamping plates (10-2) loosen from the high-strength steel bar (11) and slide relative to the high-strength steel bar (11) without bearing the force.

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