Two-stage energy dissipation buckling restrained brace

Abstract

The utility model provides a two-stage energy-dissipation buckling restrained brace which comprises a yield energy-dissipation component, a buckling restrained brace body and a buckling restrained brace body. The two ends of the yield energy-dissipation component are lead screw sections, and the middle of the yield energy-dissipation component is a buckling energy-dissipation section. The restraining sleeve is arranged on the yield energy dissipation component in a sleeving mode; the two connecting blocks are arranged on the two lead screw sections of the yield energy dissipation component in a sleeving mode correspondingly; the two friction energy dissipation modules correspond to the connecting blocks one to one and are installed in the connecting blocks, the two lead screw sections of the yield energy dissipation component are each sleeved with one friction energy dissipation module, the friction energy dissipation modules can be in friction with the connecting blocks in the connecting blocks and rotate, and relative rotation and axial relative movement exist between the lead screw sections and the friction energy dissipation modules; and the locking assembly is arranged in the connecting block and used for locking the friction energy consumption module so that the friction energy consumption module cannot rotate. The shock absorption efficiency of the structure can be improved, the engineering economy is optimized, and the design targets of shock and vibration double control and efficient shock absorption are achieved.

Description

Technical Field

[0001] This utility model relates to the field of multi-level energy dissipation supports in building structures, and particularly to a two-level energy dissipation buckling restraint support. Background Technology

[0002] In recent years, buckling-restrained braces (BRBs), as a highly efficient energy dissipation and vibration reduction device, have been widely used in various engineering projects and the reinforcement and renovation of existing buildings due to their excellent energy dissipation capacity and stable hysteretic performance under major earthquakes. Traditional BRBs dissipate seismic energy through the yielding of the core unit while relying on external restraint members to prevent overall buckling of the brace, thereby significantly improving the seismic performance of the structure. However, existing BRB technology has obvious limitations: its design target is mainly for rare earthquake conditions, and it only enters the yielding and energy dissipation stage under major earthquakes; under common vibrations such as minor earthquakes or wind-induced vibrations, BRBs only contribute elastic stiffness and cannot effectively play their energy dissipation role, thus failing to achieve dual control of earthquake and vibration.

[0003] For structures simultaneously susceptible to wind-induced vibration and seismic loads (such as super high-rise buildings, large-span spatial structures, or towering masts), existing vibration damping blocks (BRBs) struggle to meet the vibration reduction requirements of both conditions. In practice, separate wind-induced vibration control devices are typically required, complicating structural design and significantly increasing construction costs and space requirements. Therefore, achieving dual wind-induced vibration and seismic control within a single device, overcoming the limitations of existing BRB energy dissipation mechanisms, is crucial for improving structural vibration reduction efficiency and optimizing project economics. Utility Model Content

[0004] The purpose of this invention is to provide a two-stage energy-dissipating buckling restraint support. By rationally optimizing the end shape of the buckling energy-dissipating segment, the end of the buckling energy-dissipating segment is rationally combined with the ball screw, thereby improving the structural vibration reduction efficiency, optimizing the engineering economy, and achieving the design goal of dual vibration control and efficient vibration reduction.

[0005] To achieve the above objectives, this utility model provides a two-stage energy-dissipating buckling restraint support, which includes:

[0006] A yielding energy dissipation component, wherein both ends of the yielding energy dissipation component are lead screw segments, and the middle part of the yielding energy dissipation component is a buckling energy dissipation segment;

[0007] A constraint sleeve is fitted onto the yielding energy dissipation member, and the lead screw section is exposed outside the constraint sleeve.

[0008] Two connecting blocks are provided, one of which is sleeved on each of the two lead screw segments of the yielding energy dissipation component;

[0009] Two friction energy dissipation modules are installed in the connecting blocks, each corresponding to one of the connecting blocks. One friction energy dissipation module is sleeved on each of the two lead screw segments of the yielding energy dissipation component. The friction energy dissipation module has a spiral groove that cooperates with the lead screw segment. The friction energy dissipation module can rub against and rotate with the connecting block in the connecting block. The lead screw segment and the friction energy dissipation module can have relative rotation and axial relative movement, thereby achieving first-level energy dissipation.

[0010] A locking component, disposed in the connecting block, is used to lock the friction energy dissipation module so that it cannot rotate.

[0011] Optionally, the connecting block has an inner cavity for accommodating the friction energy dissipation module. The friction energy dissipation module includes a rotating friction ring, a first spring, and at least one friction plate. The friction plate is arranged around the rotating friction ring and is connected to the rotating friction ring through the first spring. The friction plate is pressed against the cavity wall of the inner cavity by the first spring. A gap is left between the ends of the friction plate to allow the locking assembly to pass through.

[0012] Optionally, the friction energy dissipation module includes two thrust bearings installed in the inner cavity. The two thrust bearings are located at the two axial ends of the rotating friction ring, so as to install the rotating friction ring in the inner cavity.

[0013] Optionally, the outer periphery of the rotating friction ring is provided with a locking groove, and the spacing between the locking groove and the end of the friction plate corresponds one-to-one. When the locking component extends into the locking groove, the friction energy dissipation module is locked and cannot rotate.

[0014] Optionally, the inner cavity wall is provided with a groove for accommodating the locking assembly. The locking assembly includes a second spring and a dovetail. The dovetail can be pushed into the inner cavity by the second spring. In the initial state, the dovetail is squeezed by the friction plate, causing the second spring to be in a compressed state, and the dovetail is located in the inner cavity wall. When the locking slot rotates to the corresponding position of the dovetail, the dovetail extends into the locking slot under the push of the second spring, thereby locking the friction energy dissipation module so that it cannot rotate, realizing the conversion between primary energy dissipation and secondary energy dissipation.

[0015] Optionally, the connecting block is provided with a clearance hole communicating with the inner cavity, the clearance hole being used to allow the lead screw segment to move therein.

[0016] Optionally, a transition reinforcement section is provided between the lead screw section and the buckling energy dissipation section of the yielding energy dissipation member. The cross section of the transition reinforcement section is cross-shaped, and the transition reinforcement section is fixedly connected to the constraint sleeve.

[0017] Optionally, multiple first constraint ribs are provided inside the constraint sleeve at positions corresponding to the transition reinforcement section, and a cross-shaped gap is formed between the first constraint ribs to lock the transition reinforcement section.

[0018] Optionally, multiple second constraint ribs are provided inside the constraint sleeve at positions corresponding to the buckling energy dissipation segment. The second constraint ribs are spaced apart, and the buckling energy dissipation segment passes through the space between the second constraint ribs, thereby constraining the deformation of the buckling energy dissipation segment.

[0019] Optionally, the friction energy dissipation module includes a plurality of balls located in the helical groove, so that the friction energy dissipation module and the lead screw segment form a ball screw pair.

[0020] As configured above, this utility model connects the support end of the yielding energy dissipation component to the connecting block via a friction energy dissipation module. Under wind-induced vibration and minor earthquakes, the lead screw segment and the friction energy dissipation module can rotate relative to each other and move axially relative to each other, thereby achieving primary energy dissipation through the friction energy dissipation module. Furthermore, the inertial mass amplification effect of the friction energy dissipation module makes energy dissipation under wind-induced vibration and minor earthquakes more efficient. Since the rotating friction ring is provided with a locking groove and the connecting block is provided with a locking component, under the design displacement (i.e., design earthquake, specifically referring to moderate earthquakes in building seismic resistance) and major earthquake displacement, the locking groove rotates to the corresponding position of the convex tenon of the locking component. The convex tenon extends into the locking groove under the push of the second spring, thereby locking the friction energy dissipation module so that it cannot rotate, so as to achieve secondary energy dissipation through the buckling energy dissipation segment. In summary, this invention optimizes the end shape of the buckling energy dissipation segment, ensuring a proper connection between the end of the segment and the ball screw. This approach guarantees easy installation while improving structural vibration reduction efficiency and optimizing engineering economy, achieving the design goals of dual vibration control and high-efficiency vibration reduction. Furthermore, during maintenance, the tenon can be unlocked for easy disassembly; only the yield energy dissipation component and / or friction energy dissipation module need to be replaced, enabling rapid replacement and repair. Attached Figure Description

[0021] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

[0022] Figure 1 This is a schematic diagram of a two-stage energy-dissipating buckling restraint support according to an embodiment of the present invention;

[0023] Figure 2 This is an exploded view of a two-stage energy-dissipating buckling restraint support according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a yielding energy dissipation component of a two-stage energy dissipation buckling restraint brace according to an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the constraint sleeve of a two-stage energy-dissipating buckling restraint support according to an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of a friction energy dissipation module and a connecting block according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of a rotating friction ring of a two-stage energy-dissipating buckling restraint support according to an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the connecting block of a two-stage energy-dissipating buckling restraint support according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the yielding energy dissipation component being inserted into the restraint sleeve in the installation method of a two-stage energy dissipation buckling restraint brace according to an embodiment of the present invention.

[0030] Figure 9 This is a schematic diagram after step 2 in the installation method of a two-stage energy-dissipating buckling-restrained brace according to an embodiment of the present invention.

[0031] Figure 10 This is a schematic diagram of a fixed truss erected on a two-stage energy-dissipating buckling restraint support according to an embodiment of the present invention.

[0032] The reference numerals in the attached figures are as follows:

[0033] 1-Yield energy dissipation component; 101-Buckling energy dissipation section; 102-Transition reinforcement section; 103-Screw section; 104-Bolt positioning hole; 2-Constraint sleeve; 201-Sleeve body; 202-Second constraint rib; 203-First constraint rib; 204-Bolt fastening groove; 3-Friction energy dissipation module; 301-Rotating friction ring; 3011-Friction plate; 3012-Locking slot; 3013-First spring; 302-Thrust bearing; 4-Connecting block; 401-Inner cavity; 4011-Flange; 4012-Cavity wall; 4013-Second spring; 402-Cover plate; 4021-Through hole; 403-Ear plate; 404-Displacement hole; 405-Connecting block body; 5-Fixing truss; 6-Positioning bolt. Detailed Implementation

[0034] In this document, unless otherwise stated, the terms “upper,” “lower,” “left,” “right,” “inner,” “outer,” “front,” “back,” “top,” “bottom,” etc., are used to indicate orientation or positional relationship based on the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a characteristic orientation and operation, and therefore should not be construed as a limitation of the present invention.

[0035] The specific embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0036] Figure 1 This is a schematic diagram of a two-stage energy-dissipating buckling restraint support according to an embodiment of the present invention. Figure 2 This is an exploded view of a two-stage energy-dissipating buckling-restrained brace according to an embodiment of this utility model. Please refer to it. Figure 1 and Figure 2 This utility model provides a two-stage energy-dissipating buckling restraint support, including a yield energy-dissipating component 1, a restraint sleeve 2, two connecting blocks 4, two friction energy-dissipating modules 3, and a locking component.

[0037] Please refer to Figure 3 The yield energy dissipation member 1 has lead screw segments 103 at both ends and a buckling energy dissipation segment 101 in the middle. A restraint sleeve 2 is fitted onto the yield energy dissipation member 1, with the lead screw segments 103 exposed. It is understood that the restraint sleeve 2, through its restraining effect, can prevent local buckling of the buckling energy dissipation segment 101 under compression, ensuring that the buckling energy dissipation segment 101 can fully yield along the entire cross-section under compression, thereby dissipating (seismic) energy. The restraint sleeve 2 can be made of, for example, Q355 or higher grade steel. The restraint sleeve 2 may or may not be filled with filler material. Filling with filler material can serve to prevent corrosion and rust.

[0038] Preferably, the constraint sleeve 2 is a square tube, and a transition reinforcement section 102 is provided between the lead screw section 103 and the buckling energy dissipation section 101 of the yield energy dissipation member 1. The transition reinforcement section 102 has a cross-shaped cross section and is fixedly connected to the constraint sleeve 2. For example, the yield energy dissipation member 1 is generally elongated, and the buckling energy dissipation section 101 has a flat cross section, which is beneficial to enhance the plastic deformation capacity of the buckling energy dissipation section 101. Furthermore, the flat core material has a more uniform stress distribution on the cross section (especially along the width direction) when under tension and compression, which can fully utilize the plastic deformation capacity of the material and avoid reducing energy dissipation efficiency due to premature yielding in some areas. The buckling energy dissipation section 101 is the main component for buckling energy dissipation and can be implemented using different metal materials (such as mild steel, Q235 steel, etc.) depending on the design load-bearing capacity.

[0039] The transition reinforcement section 102 has a cross-shaped cross section; for example, it can be a cross-shaped plate to provide reinforcement. The transition reinforcement section 102 can be made of Q355 or higher grade steel. Figure 3As shown, preferably, the cross-shaped plate has multiple bolt positioning holes 104, which extend towards the center of the cross shape. Please refer to... Figure 4 Multiple first constraint ribs 203 are provided inside the constraint sleeve 2 at positions corresponding to the transition reinforcement section 102. The first constraint ribs 203 form a cross-shaped gap to hold the transition reinforcement section 102 in place, i.e., to hold the cross-shaped plate in place, thus preventing relative rotation between the constraint sleeve 2 and the yield energy dissipation member 1. Multiple second constraint ribs 202 are provided inside the constraint sleeve 2 at positions corresponding to the buckling energy dissipation section 101. The second constraint ribs 202 are spaced apart, and the buckling energy dissipation section 101 passes through the gaps between the second constraint ribs 202, thereby constraining the deformation of the buckling energy dissipation section 101.

[0040] Specifically, the constraint sleeve 2 includes a sleeve body 201, a first constraint rib 203, and a second constraint rib 202. Bolt fastening grooves 204 are provided at positions corresponding to the transition reinforcement section 102 on the sleeve body 201. That is, bolt fastening grooves 204 are provided at both ends of the sleeve body 201. The bolt fastening grooves 204 can be, for example, strip-shaped grooves. The bolt fastening grooves 204 are used to connect and fix the sleeve body 201 to the transition reinforcement section 102 via positioning bolts 6. The thread of the positioning bolt 6 passes through the bolt fastening groove 204 and is threadedly connected to the bolt positioning hole 104 on the cross-shaped plate. The number of bolt fastening grooves 204 is not limited. In this embodiment, bolt fastening grooves 204 are provided on two opposite sidewalls at the ends of the sleeve body 201.

[0041] A connecting block 4 is fitted onto each of the two lead screw segments 103 of the yield energy dissipation component 1. Two friction energy dissipation modules 3 correspond one-to-one with the connecting blocks 4 and are installed within them. Each friction energy dissipation module 3 has a helical groove that mates with the lead screw segment. The friction energy dissipation module 3 can rub against and rotate within the connecting block 4. There can be relative rotation and axial relative movement between the lead screw segment 103 and the friction energy dissipation module 3, thereby achieving primary energy dissipation. A locking component is provided in the connecting block 4 to lock the friction energy dissipation module 3 so that it cannot rotate (i.e., prevents the friction energy dissipation module 3 from rotating). Further details can be found in the reference section. Figure 5 and Figure 6The connecting block 4 is provided with an inner cavity 401 for accommodating the friction energy dissipation module 3. The friction energy dissipation module 3 includes a rotating friction ring 301, a first spring 3013, and at least one friction plate 3011. The rotating friction ring 301 is sleeved on the lead screw section. The rotating friction ring 301 is provided with a spiral groove that cooperates with the lead screw section. The friction plate 3011 is arranged around the rotating friction ring 301. The friction plate 3011 is connected to the rotating friction ring 301 through the first spring 3013. The friction plate 3011 is pressed against the cavity wall of the inner cavity 401 by the first spring 3013. A gap is left between the ends of the friction plate 3011 to allow the locking assembly to pass through. When there is only one friction piece 3011, the friction piece 3011 surrounds the rotating friction ring 301, and there is a gap between the two ends of the friction piece 3011 for the locking assembly to pass through; when there are two or more friction pieces 3011, there is a gap between the ends of two adjacent friction pieces 3011 for the locking assembly to pass through.

[0042] Understandably, please refer to Figure 7 The connecting block 4 is provided with a clearance hole 404 that communicates with the inner cavity 401. The clearance hole 404 is used to allow the lead screw section 103 to move within it and to allow the lead screw section 103 to make way.

[0043] For example, the outer periphery of the rotating friction ring 301 is provided with a locking groove 3012. The spacing between the locking groove 3012 and the end of the friction plate 3011 corresponds one-to-one, that is, the number of locking grooves 3012 can be equal to the number of friction plates 3011. When the locking component extends into the locking groove 3012, the friction energy dissipation module 3 is locked and cannot rotate. In this utility model, the lead screw section 103 and the rotating friction ring 301 can be either a ball screw pair or a sliding screw pair. This embodiment uses a ball screw pair. It can be understood that when a ball screw pair is used, the friction energy dissipation module 3 also includes multiple balls. The rotating friction ring 301 is equivalent to the ball screw nut in the ball screw pair. The balls roll in the helical grooves in the ball screw nut to transmit motion and load. The lead screw section 103 can be welded or rolled into one piece with the transition reinforcement section 102. The lead screw section 103 is made of high-strength metal materials commonly used in ball screws according to the design load capacity, such as low alloy steels such as 9Mn2V and CrWMn.

[0044] Please refer to Figure 7The inner cavity 401 has a groove on its cavity wall 4012 for accommodating the locking assembly. The locking assembly includes a second spring 4013 and a tenon 4011. The tenon 4011 can be pushed into the inner cavity 401 by the second spring 4013. In the initial state, the tenon 4011 is squeezed by the friction plate 3011, so that the second spring 4013 is in a compressed state and the tenon 4011 is located in the cavity wall 4012 of the inner cavity 401. When the locking slot 3012 rotates to the corresponding position of the tenon 4011, the tenon 4011 extends into the locking slot 3012 under the push of the second spring 4013. That is, the tenon 4011 passes through the gap between the ends of the friction plate 3011 and then extends into the locking slot 3012, thereby locking the friction energy dissipation module 3 so that it cannot rotate, thereby enabling the buckling restraint support of this utility model to enter the buckling restraint energy dissipation state and realize the conversion between the first-level energy dissipation and the second-level energy dissipation.

[0045] Understandably, the shape of the inner cavity 401 matches the shape of the friction energy dissipation module 3; specifically, the inner cavity 401 is cylindrical. The friction plate 3011 is arc-shaped, and the cavity wall of the inner cavity 401 is made of friction material. The friction plate 3011 and the cavity wall of the inner cavity 401 can be made of common friction plate materials such as semi-metallic friction materials, or the friction surface can be formed by metal surface sandblasting or shot peening. The friction coefficient meets the design requirements. The friction plate 3011 is connected to the rotating friction ring 301 through the first spring 3013. The first spring 3013 can provide preload, pressing the friction plate 3011 against the cavity wall of the inner cavity 401, thereby dissipating friction energy. Furthermore, as the rotating friction ring 301 rotates, the pressure between the friction plate 3011 and the cavity wall of the inner cavity 401 increases under the action of centrifugal force.

[0046] For example, the connecting block 4 includes a cover plate 402, a connecting block body 405, and an ear plate 403. It is understood that the inner cavity 401 and the clearance hole 404 are both located within the connecting block body 405, and the ear plate 403 is disposed on the connecting block body 405. For example, two ear plates 403 can be disposed on one connecting block body 405, parallel to each other and disposed on the outer surface of the connecting block body 405. The ear plates 403 are used for fixed connection with the designed points. The cover plate 402 has a through hole 4021 for the lead screw section 103 to pass through. Please refer to [reference needed]. Figure 7 .

[0047] Furthermore, the friction energy dissipation module 3 includes two thrust bearings 302 installed in the inner cavity 401. The two thrust bearings 302 are located at the axial ends of the rotating friction ring 301, respectively, to install the rotating friction ring 301 in the inner cavity 401. It can be understood that the lead screw segment 103 passes through the thrust bearings 302, the rotating friction ring 301, and the thrust bearings 302 in sequence. Specifically, the rotating friction ring 301 is bolted between the two thrust bearings 302. One thrust bearing 302 is fixedly connected to the cover plate 402 by bolts, and the other thrust bearing 302 is fixedly connected to the bottom of the inner cavity 401 by bolts. The through hole 4021 on the cover plate 402, the rotating friction ring 301, and the clearance hole 404 form a concentric mounting fit, allowing the lead screw segment 103 to smoothly insert.

[0048] Based on another aspect of this utility model, this utility model also provides an installation method for a two-stage energy-dissipating buckling-restrained brace, applicable to the above-mentioned two-stage energy-dissipating buckling-restrained brace, the installation method comprising:

[0049] The constraint sleeve 2 is fitted onto the yield energy dissipation component 1; a friction energy dissipation module 3 is fitted onto each of the two lead screw segments 103 of the yield energy dissipation component 1, with the ends of the lead screw segments 103 exposed outside the friction energy dissipation module 3; the friction energy dissipation module 3 is installed in the connecting block 4; a fixed truss 5 is erected on the connecting block 4 and the constraint sleeve 2 to prevent relative movement between the yield energy dissipation component 1 and the friction energy dissipation module 3 during transportation and installation; the connecting block 4 is installed at the site design location; the fixed truss 5 is removed; during maintenance, the yield energy dissipation component 1 and / or the friction energy dissipation module 3 are replaced.

[0050] The following is a specific embodiment to further illustrate the installation method of the two-stage energy-dissipating buckling-restrained brace.

[0051] Step 1: At the factory, first insert the yield energy dissipation component 1 into the restraint sleeve 2. Please refer to... Figure 8 The positioning bolts 6 pass through the bolt fastening groove 204 and connect to the bolt positioning holes 104 on the cross-shaped plate of the transition reinforcement section 102. The number and size of the positioning bolts 6 need to be determined by the specific parameters of the buckling restraint support.

[0052] Step 2: Assemble the friction energy dissipation module 3, and together with the cover plate 402, fit it onto the lead screw section 103 of the yield energy dissipation component 1, so that the end of the lead screw section 103 protrudes. The exposed end and the reserved length should meet the design displacement requirements of the buckling restraint support. Please refer to [reference needed]. Figure 9 .

[0053] Step 3: Install connecting block 4: Push the friction energy dissipation module 3 into the inner cavity 401 of connecting block 4, so that the first spring 3013 is in a compressed state, and the friction plate 3011 presses against the cavity wall of the inner cavity 401; place the convex tenon 4011 in the corresponding position of the friction plate 3011, so that the friction plate 3011 squeezes and retracts the convex tenon 4011. The distance between the convex tenon 4011 and the locking slot 3012 needs to be calculated and determined based on the relative displacement stroke of the two ends of the yield energy dissipation component 1 when buckling constraint energy dissipation occurs in the buckling constraint support and the screw coefficient selected by the screw section 103. Fix one of the thrust bearings 302 from the end of the connecting block 4 away from the cover plate 402 with bolts, and fix the cover plate 402 to the other thrust bearing 302 with bolts. At the same time, fix the cover plate 402 to the outer surface of the connecting block 4 with bolts. After completing this step, the buckling constraint support is as follows. Figure 1 As shown.

[0054] Step 4: Install a fixed truss 5 on the connecting block 4 and the constraint sleeve 2, such as... Figure 10 As shown, this is to prevent relative movement between the yield energy dissipation component 1 and the friction energy dissipation module 3 during transportation and installation.

[0055] Step 5: During on-site hoisting and installation, the buckling restraint brace is fixed at the design point by passing a pin through the ear plate 403 and the ear plate anchored at the design point. After installation, reliable fixing, and passing inspection, the fixed truss 5 is removed.

[0056] During maintenance, such as after an earthquake or during routine maintenance, the fixed truss 5 is erected again on the connecting block 4 and the restraint sleeve 2. Then, the ear plate 403 is removed from its design position. The purpose of erecting the fixed truss 5 is to prevent relative movement between the yield energy dissipation component 1 and the friction energy dissipation module 3 during disassembly. This removes the buckling restraint brace from its design position. Afterward, the fixed truss 5 is removed, and the yield energy dissipation component 1 and / or the friction energy dissipation module 3 are replaced by reversing steps 1 to 3. Preferably, the locking component is a mechanically retractable tenon structure, which allows the tenon 4011 to be retracted into the cavity wall 4012 via a switch during post-earthquake maintenance, facilitating the reset, removal, and replacement of the buckling restraint brace.

[0057] As configured above, in this invention, the supporting end of the yield energy dissipation component 1 is connected to the connecting block 4 via the friction energy dissipation module 3. Under wind-induced vibration and minor earthquakes, the lead screw section 103 can rotate relative to the friction energy dissipation module 3 and move axially relative to it, thereby achieving primary energy dissipation through the friction energy dissipation module 3. Furthermore, the energy dissipation under wind-induced vibration and minor earthquakes is made more efficient through the amplification effect of the inertial mass of the friction energy dissipation module 3. Since the rotating friction ring 301 is provided with a locking groove 3012 and the connecting block 4 is provided with a locking component, under the design displacement (i.e., design earthquake, specifically referring to moderate earthquakes in building seismic resistance) and major earthquake displacement, the locking groove 3012 rotates to the corresponding position of the protruding tenon 4011 of the locking component. The protruding tenon 4011 extends into the locking groove 3012 under the push of the second spring 4013, thereby locking the friction energy dissipation module 3 so that it cannot rotate, so as to achieve secondary energy dissipation through the buckling energy dissipation section 101. In summary, this utility model optimizes the end shape of the buckling energy dissipation section 101, ensuring a proper connection between the end of the buckling energy dissipation section 101 and the ball screw. This improves structural vibration reduction efficiency and optimizes engineering economy while ensuring easy installation, achieving the design goals of dual vibration control and efficient vibration reduction. Furthermore, during maintenance, the tenon 4011 can be unlocked for easy disassembly; only the yield energy dissipation component 1 and / or the friction energy dissipation module 3 need to be replaced, enabling rapid replacement and repair.

[0058] It should be noted that references to "an embodiment," "an embodiment," "a specific embodiment," "some embodiments," etc., in the specification only indicate that the described embodiment may include a specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Additionally, when a specific feature, structure, or characteristic is described in conjunction with an embodiment, whether explicitly described or not, implementing such a feature, structure, or characteristic in conjunction with other embodiments is within the knowledge of those skilled in the art.

[0059] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0060] It should also be noted that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the present invention without departing from the scope of the present invention, or equivalent embodiments can be modified based on the disclosed technical content. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the protection scope of the present invention.

[0061] It should also be understood that, unless otherwise specified or indicated, the terms “first,” “second,” “third,” etc., in the specification are used only to distinguish the various components, elements, and steps in the specification, and not to indicate the logical or sequential relationships between the various components, elements, and steps.

[0062] Furthermore, it should be recognized that the terminology described herein is used only to describe particular embodiments and not to limit the scope of the invention. It must be noted that the singular forms “a” and “an” used herein and in the appended claims include plural bases unless the context clearly indicates otherwise. For example, a reference to “a step” or “an apparatus” means a reference to one or more steps or apparatuses, and may include secondary steps and secondary apparatuses. All conjunctions used should be understood in the broadest sense. Also, the word “or” should be understood to have the definition of logical “or” rather than logical “exclusive OR”, unless the context clearly indicates otherwise. Furthermore, implementation of the methods and / or devices in embodiments of the invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. A two-stage energy-dissipating buckling-restrained brace, characterized in that, include: A yielding energy dissipation component, wherein both ends of the yielding energy dissipation component are lead screw segments, and the middle part of the yielding energy dissipation component is a buckling energy dissipation segment; A constraint sleeve is fitted onto the yielding energy dissipation member, and the lead screw section is exposed outside the constraint sleeve. Two connecting blocks are provided, one of which is sleeved on each of the two lead screw segments of the yielding energy dissipation component; Two friction energy dissipation modules are installed in the connecting blocks, each corresponding to one of the connecting blocks. One friction energy dissipation module is sleeved on each of the two lead screw segments of the yielding energy dissipation component. The friction energy dissipation module has a spiral groove that cooperates with the lead screw segment. The friction energy dissipation module can rub against and rotate with the connecting block in the connecting block. The lead screw segment and the friction energy dissipation module can have relative rotation and axial relative movement, thereby achieving first-level energy dissipation. A locking component, disposed in the connecting block, is used to lock the friction energy dissipation module so that it cannot rotate.

2. The two-stage energy-dissipating buckling restraint brace as described in claim 1, characterized in that, The connecting block has an inner cavity for accommodating the friction energy dissipation module. The friction energy dissipation module includes a rotating friction ring, a first spring, and at least one friction plate. The friction plate is arranged around the rotating friction ring and is connected to the rotating friction ring through the first spring. The friction plate is pressed against the cavity wall of the inner cavity by the first spring. A gap is left between the ends of the friction plate to allow the locking assembly to pass through.

3. The two-stage energy-dissipating buckling restraint brace as described in claim 2, characterized in that, The friction energy dissipation module includes two thrust bearings installed in the inner cavity. The two thrust bearings are located at the two axial ends of the rotating friction ring, so as to install the rotating friction ring in the inner cavity.

4. The two-stage energy-dissipating buckling restraint brace as described in claim 2, characterized in that, The outer circumference of the rotating friction ring is provided with a locking groove, and the spacing between the locking groove and the end of the friction plate corresponds one-to-one. When the locking component extends into the locking groove, the friction energy dissipation module is locked and cannot rotate.

5. The two-stage energy-dissipating buckling restraint brace as described in claim 4, characterized in that, The inner cavity wall is provided with a groove for accommodating the locking assembly. The locking assembly includes a second spring and a dovetail. The dovetail can be pushed into the inner cavity by the second spring. In the initial state, the dovetail is squeezed by the friction plate, so that the second spring is in a compressed state and the dovetail is located in the inner cavity wall. When the locking slot rotates to the corresponding position of the protruding falcon, the protruding falcon extends into the locking slot under the push of the second spring, thereby locking the friction energy dissipation module so that it cannot rotate, realizing the conversion between primary energy dissipation and secondary energy dissipation.

6. The two-stage energy-dissipating buckling restraint brace as described in claim 2, characterized in that, The connecting block is provided with a clearance hole that communicates with the inner cavity, and the clearance hole is used to allow the lead screw segment to move within it.

7. The two-stage energy-dissipating buckling restraint brace as described in claim 1, characterized in that, A transition reinforcement section is provided between the lead screw section and the buckling energy dissipation section of the yielding energy dissipation member. The cross section of the transition reinforcement section is cross-shaped, and the transition reinforcement section is fixedly connected to the constraint sleeve.

8. The two-stage energy-dissipating buckling restraint brace as described in claim 7, characterized in that, Multiple first constraint ribs are provided inside the constraint sleeve at positions corresponding to the transition reinforcement section, and cross-shaped gaps are formed between the first constraint ribs to lock the transition reinforcement section.

9. The two-stage energy-dissipating buckling restraint brace as described in claim 1, characterized in that, Multiple second constraint ribs are provided inside the constraint sleeve at positions corresponding to the buckling energy dissipation segment. There is a gap between the second constraint ribs, and the buckling energy dissipation segment passes through the gap between the second constraint ribs, thereby constraining the deformation of the buckling energy dissipation segment.

10. The two-stage energy-dissipating buckling restraint brace as described in claim 1, characterized in that, The friction energy dissipation module includes multiple balls located in the spiral groove, so that the friction energy dissipation module and the lead screw section form a ball screw pair.

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