Design method of one-way force transmission low prestress demand self-resetting shear device

Abstract

The application provides a one-way force transmission low prestress demand self-resetting shear device design method, which comprises the following steps: designing a one-way force transmission energy dissipation system in the one-way force transmission low prestress demand self-resetting shear device according to the shear demand of the device installation position; determining the arrangement form, quantity and cross-sectional area of the energy dissipation system in the one-way force transmission energy dissipation system; designing a self-resetting prestress system in the device prestress demand self-resetting shear device; and designing a support and transmission mechanism for connecting the one-way force transmission energy dissipation system and the self-resetting prestress system. The method solves the problems of high-level prestress application and limited deformation capacity of the self-resetting energy dissipation device, and only a small amount of prestress needs to be applied to realize complete self-resetting of the device; the energy dissipation element of the device is arranged on the periphery, and the overall device does not need to be disassembled after an earthquake to be replaced, so that the device can be quickly repaired.

Description

Technical Field

[0001] This invention is used for prefabricated buildings, 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-dissipating devices, this invention proposes a design method for a unidirectional force-transmitting self-resetting shear-resistant device with low prestress requirements. This design method is simple, and the designed shear-resistant device can achieve relative slippage during the device's reset process through a unidirectional force-transmitting system, eliminating the frictional resistance of the energy-dissipating system against reset and achieving the goal of complete reset with only a small amount of prestress.

[0006] This new device can provide both energy dissipation and self-resetting capabilities when shear deformation occurs; and it can achieve complete reset with only a small amount of prestress; it features strong deformation capacity, low cost, and reliable performance.

[0007] To achieve the above objectives, the present invention provides the following design scheme:

[0008] Step 1: Based on the shear resistance requirements at the installation location, design the unidirectional force transmission energy dissipation system in the unidirectional force transmission low prestress self-resetting shear resistance device;

[0009] Step 2: Determine the layout, quantity, and cross-sectional area of ​​the energy-consuming systems in the unidirectional force transmission energy-consuming system;

[0010] Step 3: Design of the prestressing requirements of the device; self-centering prestressing system in the self-centering shear device.

[0011] Step 4: Design the support and transmission mechanism for connecting the unidirectional force transmission and energy dissipation system and the self-resetting prestressed system.

[0012] The unidirectional force transmission energy dissipation system described in step one is a combination of a unidirectional force transmission system and an energy dissipation system connected in series. When the unidirectional force transmission energy dissipation system is under tension, it transmits the tension force, allowing the energy dissipation system to dissipate the energy of the input device. When the unidirectional force transmission energy dissipation system is under compression, relative slippage occurs inside the unidirectional force transmission system, but no force is transmitted, and the energy dissipation system is not under force at this time.

[0013] The energy dissipation system in the unidirectional force transmission energy dissipation system described in step two generally employs the yield deformation of energy-dissipating metal rods to dissipate energy. As the shear strength requirement at the device installation location increases, the number of energy-dissipating metal rods can be increased to meet the device's energy dissipation needs. The energy-dissipating metal rods in the device generally consist of two parts: a connecting section and a core energy-dissipating section. The connecting section is used to fix the energy-dissipating metal rods and must ensure that it remains in an elastic state during normal operation, meaning that the core energy-dissipating section of the energy-dissipating metal rod does not yield when it reaches maximum tensile stress. ;in The effective cross-sectional area of ​​the connecting section of a single energy-consuming metal rod. The cross-sectional area of ​​the core energy-consuming section of a single energy-consuming metal rod. , The yield strength and tensile strength of the selected metallic materials are respectively given. The cross-sectional area of ​​the core energy-dissipating section of a single energy-dissipating metal rod in the device can be estimated as follows: ;in The design yield strength of the self-resetting shear device with low prestress requirements for unidirectional force transmission is given. This represents the number of energy-consuming metal rods.

[0014] The self-resetting prestressed system described in step three typically consists of a prestressed screw and a disc spring assembly connected in series. When shear deformation occurs, the disc spring assembly in the self-resetting prestressed system undergoes elastic deformation, and the energy stored in its elastic deformation completes the device's reset. Simultaneously, it must be ensured that the disc spring assembly does not flatten before reaching maximum deformation; ;in This refers to the number of disc springs in the disc spring assembly; The effective deformation of a single disc spring in a disc spring assembly after applying prestress to a self-resetting prestressed system: , and These represent the ultimate deformation of a single disc spring and the initial deformation of a single disc spring after prestressing is applied to the self-resetting prestressing system, respectively. The ultimate deformation is designed for a unidirectional force transmission, low prestress requirement, self-resetting shear-resistant device. The prestressed screw is only used to apply a small amount of prestress when assembling the unidirectional force transmission, low prestress requirement, self-resetting shear-resistant device, and it must be ensured that the prestressed screw remains in an elastic state during the operation of the shear-resistant device.

[0015] The support and transmission mechanism described in step four are used to transmit the energy input to the device when external shear deformation occurs, and simultaneously connect the unidirectional force transmission energy dissipation system and the self-resetting prestressing system. When designing the support and transmission mechanism of the device, it is necessary to ensure that they remain in an elastic state and do not undergo significant deformation when subjected to maximum seismic resistance requirements, so as to ensure that the device can always operate normally.

[0016] The beneficial effects of this invention are:

[0017] (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;

[0018] (2) It solved the problem of limited deformation capacity of self-resetting energy dissipation devices;

[0019] (3) Only a small amount of prestress is required to achieve complete self-resetting of the device;

[0020] (4) The energy-consuming components of the device are easy to replace after an earthquake, enabling the device to be repaired quickly. Attached Figure Description

[0021] Figure 1 This is a flowchart of the design method of the present invention;

[0022] Figure 2 This is a conceptual diagram of a unidirectional force transmission, low prestress requirement, self-resetting shear-resistant device according to the present invention.

[0023] Figure 3 This is a structural diagram of a self-resetting shear-resistant device with unidirectional force transmission and low prestress requirements according to an embodiment of the present invention.

[0024] Figure 4 This is a cross-sectional view of the unidirectional force transmission low prestress self-resetting shear-resistant device according to an embodiment of the present invention;

[0025] Figure 5 The diagram shows the structural components of the bracket and transmission mechanism in the embodiment.

[0026] Figure 6 This is a cross-sectional view of the connecting components of the bracket and transmission mechanism in the embodiment;

[0027] Figure 7 This is a structural diagram of the upper connecting component in an embodiment;

[0028] Figure 8 This is a cross-sectional view of the upper connecting component in the embodiment;

[0029] Figure 9 This is a structural diagram of the left and right connecting components in the embodiment;

[0030] Figure 10 This is a structural diagram of the lower connecting component in an embodiment;

[0031] Figure 11 This is a schematic diagram of the disc spring assembly connected to the disc spring baffle in an embodiment.

[0032] Figure 12 This is a schematic diagram of an energy-consuming metal rod used in an embodiment.

[0033] Figure 13 This is a schematic diagram showing the structure and state comparison of a self-locking clamp in a unidirectional force transmission system as an example.

[0034] Figure 14 This is a schematic diagram of the self-resetting shear-resistant device with low prestress requirement for unidirectional force transmission according to an embodiment of the present invention;

[0035] Figure 15 This is a schematic diagram illustrating the application scenario of the device in the embodiment;

[0036] Figure 16 The device deformation and energy dissipation mechanism are illustrated in the embodiment.

[0037] Explanation of the labels in the diagram:

[0038] 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;

[0039] 2 is the left end connecting component, 2-1 is the first cylinder, and 2-2 is the first wing;

[0040] 3 is the right end connecting component, 3-1 is the second cylinder, and 3-2 is the second wing;

[0041] 4 is the lower connecting component, 4-1 is the cylindrical rod, and 4-2 is the bottom connecting plate;

[0042] 5 is the prestressed screw, 6 is the disc spring baffle, and 7 is the disc spring assembly.

[0043] 8 represents the energy-consuming metal rod, 8-1 represents the core energy-consuming section, and 8-2 represents the connecting section;

[0044] 9 represents the intermediate connecting component;

[0045] 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;

[0046] 11 is a high-strength steel bar. Detailed Implementation

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] like Figure 1 As shown, this invention proposes a design method for a unidirectional force transmission, low prestress requirement, self-resetting shear-resistant device. The main design steps include: designing an energy-dissipating system for unidirectional force transmission in the low prestress requirement self-resetting shear-resistant device based on the shear strength requirements at the device installation location; designing a self-resetting prestressing system based on the strength requirements of the self-resetting shear-resistant device based on the prestress requirements; and designing a support and transmission mechanism for connecting the energy-dissipating system for unidirectional force transmission and the self-resetting prestressing system based on the limits required at the device installation location.

[0052] When the device undergoes shear deformation, the unidirectional force-transmitting energy-dissipating system undergoes tensile yielding deformation, while the self-resetting prestressing system undergoes elastic deformation. The device then completes its reset through the restoring force generated by the deformation of the self-resetting prestressing system during loading. This invention features a simple design process, requires no precision machining of components, is inexpensive, and offers stable and reliable performance. It solves the problems of requiring high levels of prestress and limited deformation capacity in self-resetting energy-dissipating devices, requiring only a small amount of prestress to achieve complete self-resetting. Furthermore, the energy-dissipating elements are located on the periphery, allowing for replacement without disassembling the entire device after an earthquake, enabling rapid repair.

[0053] This invention proposes a design method for a unidirectional force transmission, low prestress requirement, self-resetting shear-resistant device. It is typically used to design components in buildings that require enhanced shear resistance, such as connections between shear walls and wall segments, connections between shear walls and columns, connections between different spans of frames, and mid-span inflection points of coupling beams. This aims to reduce shear failure of building structures under seismic loading and improve the seismic performance of the structure.

[0054] This invention provides a design method for a unidirectional force transmission, low prestress requirement, self-resetting shear-resistant device, as exemplified rather than limited. The final product concept diagram is shown below. Figure 2 As shown below, the product structure will be further explained in detail through examples.

[0055] The unidirectional clamp force transmission low prestress self-resetting shear-resistant device of the present invention is constructed as follows: Figure 3 and Figure 4 As shown, it includes: a unidirectional force transmission and energy dissipation system, a self-resetting prestressing system, and a bracket and transmission mechanism for installing the unidirectional force transmission and 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 unidirectional force transmission and 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).

[0056] like Figure 5 , Figure 6 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;

[0057] 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;

[0058] 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.

[0059] Specifically, in the bracket and transmission mechanism:

[0060] like Figure 7 , Figure 8 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.

[0061] like Figure 10 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.

[0062] 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.

[0063] like Figure 9 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:

[0064] 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.

[0065] 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;

[0066] The first cylinder 2-1 and the second cylinder 3-1 are at the same height;

[0067] 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.

[0068] Conversely, the same applies if the positions of the connecting parts at the left and right ends are interchanged.

[0069] 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.

[0070] 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.

[0071] Furthermore, the width W of the first wing 2-2 2,2 The width of the slot in the lower cavity 1-3 of the upper connecting component 1 must be smaller than W1, and the width of the second wing 3-2 must be smaller than W1, the width of the slot in the first cylinder 2-1 of the left connecting component 2. 2,1 The groove 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 move relative to each other within the lower cavity 1-3.

[0072] 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: .

[0073] The unidirectional force transmission and energy dissipation system includes a unidirectional force transmission system and an energy dissipation system:

[0074] The unidirectional force transmission 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 3 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 system.

[0075] 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.

[0076] Specifically, such as Figure 13As 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...

[0077] 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.

[0078] 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;

[0079] 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.

[0080] 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.

[0081] In the embodiments, the self-locking fixture's structure and working principle are as follows: Figure 13 The device of this invention, during the energy-consuming phase, such as... Figure 13 (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-consuming metal bar 8 to dissipate energy; while in the reset phase, as Figure 13 (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 metal bar 8, which is in a tensile state during the energy-consuming stage, being compressed.

[0082] The energy-consuming system consists of two or more energy-consuming metal rods 8, with their upper and lower ends fixed to the top connecting plate 1-1 of the upper connecting component 1 and the middle connecting component 9, respectively.

[0083] When in use, the energy-consuming metal rod 8 is a consumable and can be replaced.

[0084] Specifically, such as Figure 12 As shown, the energy-consuming metal rod 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.

[0085] As an example, the energy-consuming system consists of two energy-consuming metal rods, wherein the energy-consuming metal rods mainly consume energy through their central core energy-consuming section 8-1, the cross-sectional area of ​​which is estimated to be:

[0086] ;

[0087] in The design yield strength of the self-resetting shear device with low prestress requirements for unidirectional force transmission is given. The number of energy-consuming metal rods (in this embodiment) ), To select the yield strength of the metallic material.

[0088] When the device is working normally, the connecting section of the energy-consuming metal rod is always in an elastic state, and its effective cross-sectional area satisfies:

[0089] Among them, The effective cross-sectional area of ​​the connecting section of a single energy-consuming metal rod. The cross-sectional area of ​​the energy-dissipating yield section of a single energy-dissipating metal rod. , The yield strength and tensile strength of the selected metal materials are respectively chosen. Further, as an embodiment, the connecting section 8-2 of the energy-dissipating metal rod 8 is threaded, and the upper and lower ends of the energy-dissipating metal rod 8 can be fixed to the top connecting plate 1-1 of the upper connecting component and the middle connecting component 9 respectively using nuts.

[0090] The self-resetting prestressing system is installed on the bracket and transmission mechanism: such as Figure 3 , Figure 11 As shown, the self-resetting 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, which satisfies the requirement that the disc spring assembly will not be flattened before reaching its maximum deformation. ;

[0091] in This refers to the number of disc springs in the disc spring assembly; The effective deformation of a single disc spring in a disc spring assembly after applying prestress to a self-resetting prestressed system: , and These represent the ultimate deformation of a single disc spring and the initial deformation of a single disc spring after prestressing is applied to the self-resetting prestressing system, respectively. The limit deformation amount designed for the inventive device.

[0092] The disc spring assembly 7 and the disc spring baffle 6 are disposed 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 provided with through holes 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;

[0093] 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.

[0094] To further demonstrate the application scenarios of the unidirectional force transmission, low prestress requirement, self-resetting shear-resistant device of the present invention, as shown in the following examples... Figure 15 The figure shown is shown in the image.

[0095] To further demonstrate the design principle of the unidirectional force transmission, low prestress requirement, self-resetting shear-resistant device of the present invention, application examples are provided:

[0096] The device designed in this invention has many applications, such as in the design of shear wall-to-wall connections, shear wall-to-column connections, connections between different spans of frames, and mid-span inflection points of coupling beams—components in buildings requiring enhanced shear resistance. 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 limitation; application scenarios include… Figure 15 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 16 (The three stages shown)

[0097] 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 5 , Figure 6 As 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-consuming metal rod 8 remains stationary on the device.

[0098] 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:

[0099] This causes the disc spring assembly 7 in the prestressed system to be continuously compressed and store energy within the upper cavity 1-3;

[0100] 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;

[0101] At the same time, the energy-consuming metal 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.

[0102] 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.

[0103] 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:

[0104] 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;

[0105] 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.

[0106] 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.

[0107] In application, the unidirectional 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).

[0108] Specifically:

[0109] 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.

[0110] 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.

[0111] 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 13 As shown.

[0112] 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.

[0113] 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.

[0114] 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 design method for a unidirectional force transmission, low prestress requirement, self-resetting shear-resistant device, characterized in that, include: Step 1: Based on the shear resistance requirements at the installation location, design the unidirectional force transmission energy dissipation system in the unidirectional force transmission low prestress self-resetting shear resistance device; Step 2: Determine the layout, quantity, and cross-sectional area of ​​the energy-consuming systems in the unidirectional force transmission energy-consuming system; Step 3: Design the self-resetting prestressing system in the self-resetting shear resistance device to meet the prestressing requirements of the device; Step 4: Design the bracket and transmission mechanism for connecting the unidirectional force transmission energy dissipation system and the self-resetting prestressed system.

2. The method as described in claim 1, characterized in that, The unidirectional force transmission energy dissipation system described in step one is a combination of a unidirectional force transmission system and an energy dissipation system connected in series. When the unidirectional force transmission energy dissipation system is under tension, it transmits the tension force, allowing the energy dissipation system to dissipate the energy of the input device. When the unidirectional force transmission energy dissipation system is under compression, relative slippage occurs inside the unidirectional force transmission system, but no force is transmitted, and the energy dissipation system is not under force at this time.

3. The method as described in claim 1, characterized in that, The energy dissipation system in the unidirectional force transmission energy dissipation system described in step two employs the yield deformation of energy-dissipating metal rods to dissipate energy. As the shear strength requirement at the device installation location increases, the number of energy-dissipating metal rods is increased to meet the device's energy dissipation needs. The energy-dissipating metal rods in the device consist of two parts: a connecting section and a core energy-dissipating section. The connecting section is used to fix the energy-dissipating metal rods and must ensure that it remains in an elastic state during normal operation, meaning that the core energy-dissipating section of the energy-dissipating metal rod does not yield when it reaches maximum tensile stress. ;in The effective cross-sectional area of ​​the connecting section of a single energy-consuming metal rod. The cross-sectional area of ​​the core energy-consuming section of a single energy-consuming metal rod. , The yield strength and tensile strength of the selected metallic materials are respectively used; the estimated cross-sectional area of ​​the core energy-consuming section of a single energy-consuming metal rod in the device is as follows: ;in The design yield strength of the self-resetting shear device with low prestress requirements for unidirectional force transmission is given. This represents the number of energy-consuming metal rods.

4. The method as described in claim 1, characterized in that, The self-resetting prestressed system described in step three is composed of a prestressed screw and a disc spring assembly connected in series. When shear deformation occurs, the disc spring assembly in the self-resetting prestressed system undergoes elastic deformation and completes the device reset through the energy stored in its elastic deformation. At the same time, it is necessary to ensure that the disc spring assembly will not be flattened before reaching the maximum deformation. ;in This refers to the number of disc springs in the disc spring assembly; The effective deformation of a single disc spring in a disc spring assembly after applying prestress to a self-resetting prestressed system: , and These represent the ultimate deformation of a single disc spring and the initial deformation of a single disc spring after prestressing is applied to the self-resetting prestressing system, respectively. The ultimate deformation is designed for a unidirectional force transmission, low prestress requirement, self-resetting shear-resistant device; the prestressed screw is only used to apply a small amount of prestress when assembling the unidirectional force transmission, low prestress requirement, self-resetting shear-resistant device, to control the prestressed screw to always be in an elastic state when the unidirectional force transmission, low prestress requirement, self-resetting shear-resistant device is working.

5. The method as described in claim 1, characterized in that, The support and transmission mechanism described in step four are used to transmit the energy input to the device when external shear deformation occurs, and at the same time connect the energy dissipation system for unidirectional force transmission and the self-resetting prestressing system. When designing the support and transmission mechanism of the device, it is controlled to remain in an elastic state and not produce large deformation when subjected to the maximum seismic resistance requirements, so as to ensure that the device can always work normally.

6. The method as described in claim 1, characterized in that, The designed unidirectional clamp force transmission low prestress requirement self-resetting shear-resistant device includes: a unidirectional force transmission energy dissipation system, a self-resetting prestressing system, and a bracket and transmission mechanism for installing the unidirectional force transmission energy dissipation system and the self-resetting prestressing system; the three form an integrated unit, connected to external energy input through the bracket and transmission mechanism; in terms of functional relationship, when the device undergoes shear deformation, the unidirectional force transmission 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 the shear deformation process.

7. The method as described in claim 6, characterized in that, 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.

8. The method as described in claim 7, characterized in that, The unidirectional force transmission and energy dissipation system includes a unidirectional force transmission system and an energy dissipation system, wherein: The unidirectional force transmission system includes a self-locking clamp (10) and a high-strength steel bar (11); the self-locking clamp (10) is fixed on the intermediate connecting component (9), and the high-strength steel bar (11) is disposed between the intermediate connecting component (9) and the lower connecting component (4); The energy-consuming system consists of two or more energy-consuming metal rods (8), with their upper and lower ends fixed to the top connecting plate (1-1) of the upper connecting component (1) and the middle connecting component (9), respectively.

9. The method as described in claim 7, characterized in that, The self-resetting prestressing system is installed on the bracket and transmission mechanism. The self-resetting 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. 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 provided with through holes. 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).

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