Reverse friction buckling-restrained energy dissipation support and control method

Abstract

The invention relates to a reverse friction buckling-restrained energy dissipation support and a control method, the reverse friction buckling-restrained energy dissipation support comprises a buckling-free energy dissipation unit, a forward constraint unit and a reverse constraint unit, and the forward constraint unit is arranged at one end of the buckling-free energy dissipation unit and is in sliding connection with the end of the buckling-free energy dissipation unit; the reverse constraint unit is arranged at the other end of the buckling-free energy dissipation unit and is fixedly connected with the end of the buckling-free energy dissipation unit; wherein the forward constraint unit and the reverse constraint unit are oppositely arranged, and when the support bears an axial load, the forward constraint unit and the reverse constraint unit respectively follow different end parts of the buckling-free energy dissipation unit to move in opposite directions, so that a reverse friction mechanism is realized. According to the reverse friction buckling-restrained energy dissipation support and the control method, the double-order yield of the buckling energy dissipation support is fused with the support limiting device, meanwhile, the friction force in the energy dissipation core of the buckling restrained support is self-balanced, the deformation uniformity of the support is improved, and therefore the fatigue performance is improved. The overall structure of the support is free of numerous external additional devices, low in manufacturing cost and convenient for engineering application.

Description

Technical Field

[0001] This invention belongs to the field of disaster prevention and vibration reduction technology in civil engineering, and specifically relates to a reverse friction buckling-resistant energy dissipation support and control method. Background Technology

[0002] Traditional buckling-restrained braces (BRBs) protect the outer restraint member and the inner energy dissipation core. Their main working mechanism is that the restraint member limits the instability of the energy dissipation core under compression, thus achieving consistent tensile and compressive hysteretic performance. However, BRBs suffer from low-cycle fatigue fracture under seismic loading. Studies have found that the fatigue fracture performance of BRBs is significantly lower than the low-cycle fatigue performance of their materials, primarily due to the inherent strain inhomogeneity of the inner energy dissipation core. Under core compression, the energy dissipation core develops high-order micro-buckling within the restraint member, exhibiting compressive friction behavior with the restraint member at the crests and troughs. This micro-buckling introduces bending strain into the cross-section, while contact friction accumulates along the axis, creating a difference in axial force. To improve the fatigue performance of BRBs, the essential approach is to reduce the strain inhomogeneity within the energy dissipation core. Key methods include reducing the gap between the restraint member and the energy dissipation core and adding unbonded materials to reduce friction, but these methods have limited effectiveness. Some researchers have explored using materials with higher fatigue performance, such as iron-based shape memory alloys, but these are limited by high cost and current technological immaturity.

[0003] In addition, buckling-restrained braces have two application pain points: First, due to their large yield displacement, buckling-restrained braces have low energy dissipation efficiency under small earthquakes. Second, buckling-restrained braces have low stiffness after yielding, which easily leads to inter-story deformation concentration, causing excessive brace deformation, resulting in brace fracture and damage to weak stories.

[0004] Therefore, how to provide a reverse friction anti-buckling energy dissipation support and control method is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a reverse friction buckling-resistance energy dissipation brace and its control method, which integrates the double-stage yielding of the buckling energy dissipation brace with the brace limiting device. Simultaneously, it enables the frictional force within the energy dissipation core of the buckling-resistance brace to self-balance, improving the deformation uniformity of the brace and thus enhancing its fatigue performance. The overall structure of the brace requires no numerous external additional devices, resulting in low cost and ease of engineering application.

[0006] To solve the above technical problems, the present invention includes the following technical solutions:

[0007] A reverse friction buckling-resistant energy dissipation brace, comprising:

[0008] A buckling-free energy dissipation unit;

[0009] A positive constraint unit is disposed at one end of the buckling-free energy dissipation unit and slidably connected to that end;

[0010] A reverse constraint unit is disposed at the other end of the buckling-free energy dissipation unit and fixedly connected to that end;

[0011] The positive constraint unit and the negative constraint unit are arranged opposite to each other. When the support is subjected to axial load, the positive constraint unit and the negative constraint unit move in opposite directions following the different ends of the buckling-free energy dissipation unit to realize the reverse friction mechanism.

[0012] Furthermore, the buckling-free energy dissipation unit includes a local weakening plate, a pair of first perforated plates and a pair of second perforated plates. Each end of the local weakening plate is fixedly connected to a first perforated plate and a second perforated plate, and the first perforated plate and the second perforated plate are arranged in a central rotational symmetry.

[0013] Furthermore, the positive constraint unit includes:

[0014] A first plate has several first elongated holes for accommodating connectors and providing displacement clearance when the support deforms. The end of the first plate has a first elongated slit. The length of the first elongated hole is greater than or equal to twice the maximum deformation designed for the support.

[0015] A first reinforcing member is fixed to the first flat plate and covers the main body area of ​​the first flat plate;

[0016] At least one first rib is fixedly connected to the first flat plate and the first reinforcing member respectively, and part of the first rib extends into the interior of the first reinforcing member. A plurality of first circular holes are also provided on the first rib.

[0017] Furthermore, the positive constraint unit also includes a pressure plate and a first sliding layer. The first sliding layer is stacked on the outside of the first flat plate, and the pressure plate is stacked on the outside of the first sliding layer. The pressure plate is then fixedly connected to the buckling-free energy dissipation unit by a constraint bolt passing through the pressure plate, the first sliding layer, and the first elongated hole in sequence.

[0018] Furthermore, the reverse constraint unit includes:

[0019] A second plate has several second circular holes, the positions of which are aligned with the first elongated circular holes. A second long slit is formed at the end of the second plate.

[0020] A second reinforcing member is fixed to the second plate and covers the main body area of ​​the second plate;

[0021] At least one second rib is fixedly connected to the second flat plate and the second reinforcing member respectively, and a portion of the second rib extends into the interior of the second reinforcing member. Several third circular holes are also provided on the second rib.

[0022] Furthermore, the reverse restraint unit also includes at least one first pad and at least one second sliding layer. The first pad and the second sliding layer are stacked and placed between the corner of the non-buckling energy dissipation unit and the reverse restraint unit. The second pad is provided in the middle of the non-buckling energy dissipation unit.

[0023] Furthermore, the pressure plate is a long strip plate with several sixth circular holes. The first sliding layer has the same planar dimensions as the pressure plate, and a seventh circular hole aligned with the sixth circular holes is formed on the first sliding layer.

[0024] Furthermore, one end of the first pad has a notch that matches the shape of the end of the non-buckling energy dissipation unit, and also has several eighth circular holes. The position of the eighth circular holes matches the size of the second circular holes. The plane size of the second sliding layer is the same as that of the first pad. The second pad is a rectangular plate with several ninth circular holes on its plane. The position of the ninth circular holes matches the size of the second circular holes.

[0025] Furthermore, the thickness of the second pad is 2mm to 4mm greater than the thickness of the non-buckling energy dissipation unit, and the sum of the thicknesses of the first pad and the second sliding layer is 0.5mm greater than the thickness of the second pad. The thickness of the second sliding layer is greater than or equal to 1mm and less than or equal to half the thickness of the non-buckling energy dissipation unit.

[0026] The present invention also provides a method for controlling reverse friction buckling-resistant energy dissipation supports, the method comprising the following steps:

[0027] Step S1: Provide the reverse friction buckling-resistant energy dissipation support;

[0028] Step S2: When the support is subjected to axial tensile load, the positive constraint unit moves in the same direction as the second end of the non-buckling energy dissipation unit, while its first end slides relative to it; the reverse constraint unit moves in the same direction as the first end of the non-buckling energy dissipation unit, while its second end slides relative to it; and the positive constraint unit and the reverse constraint unit slide relative to each other, generating friction only at the preset friction interface to achieve frictional energy dissipation.

[0029] When the support is subjected to axial compressive load, the positive restraint unit moves in the opposite direction to the second end of the non-buckling energy dissipation unit; the reverse restraint unit moves in the opposite direction to the first end of the non-buckling energy dissipation unit; when the non-buckling energy dissipation unit undergoes slight buckling and comes into contact with the positive restraint unit and the reverse restraint unit, the positive restraint unit applies a frictional force in a first direction to the upper surface of the non-buckling energy dissipation unit, while the reverse restraint unit applies a frictional force in a second direction opposite to the first direction to the lower surface of the non-buckling energy dissipation unit. The frictional forces in the first and second directions cancel each other out, thereby suppressing the buckling deformation of the non-buckling energy dissipation unit.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] (1) The reverse friction buckling-resistant energy dissipation support provided by the present invention has a buckling-free energy dissipation unit fixedly connected to the positive constraint unit and the reverse constraint unit at different ends. Thus, when the buckling-free energy dissipation unit is under tension or compression, the positive constraint unit and the reverse constraint unit will move in opposite directions, thereby making the frictional forces on the upper and lower surfaces of the buckling-free energy dissipation unit opposite, achieving frictional self-balancing, and improving the deformation uniformity of the buckling-free energy dissipation unit. The first perforated plate is connected to the sliding connector by a sliding bolt, so that the support relies on friction to dissipate energy in the early stage, while the sliding bolt can limit the maximum deformation of the support in the later stage. The first constraint plate has a first elongated hole so that the positive constraint unit can slide relative to the reverse constraint unit. The first and second sliding aid layers can avoid the generation of frictional force, ensuring that frictional force is generated only between the second pad and the first constraint plate. The frictional yield force of the support can be adjusted by controlling the length of the first pad and the second pad.

[0032] (2) This invention employs a reverse friction mechanism to eliminate internal frictional forces in buckling-restrained supports, which can effectively improve the deformation uniformity of the supports and enhance their resistance to low-cycle fatigue fracture. Simultaneously, the reverse friction mechanism naturally achieves both support restraint and double-yield effects, making it simpler than existing structural forms and eliminating the need for any external additional cables or rods for restraint, thus facilitating engineering applications. The restraint component not only serves as a restrained, buckling-free energy dissipation unit under minor and moderate earthquakes but also restricts support deformation under major earthquakes, enabling the support to dissipate energy through friction under minor earthquakes, through a combination of friction and metal yielding under moderate earthquakes, and degenerate into a normal support with enhanced lateral resistance under major earthquakes. Attached Figure Description

[0033] Figure 1 This is an isometric view of the reverse friction buckling-resistant energy dissipation support after assembly according to an embodiment of the present invention;

[0034] Figure 2 This is a side view of the reverse friction buckling-resistant energy dissipation support assembly according to an embodiment of the present invention;

[0035] Figure 3 This is a left view of the reverse friction buckling-resistant energy dissipation support after assembly according to an embodiment of the present invention;

[0036] Figure 4 This is a disassembled diagram of a reverse friction anti-buckling energy dissipation support component according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of a buckling-free energy dissipation unit according to an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of a positive constraint unit according to an embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of a reverse constraint unit according to an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of a pressure plate according to an embodiment of the present invention;

[0041] Figure 9 This is a schematic diagram of a first pad, a second pad, and a second slip-aiding layer according to an embodiment of the present invention.

[0042] 1-Buckling-free energy dissipation unit, 2-Forward constraint unit, 3-Reverse constraint unit, 4-Sliding connector, 5-Non-sliding connector, 6-Pressure plate, 7-Sliding bolt, 8-Fixing bolt, 9-Constraint bolt, 10-First sliding layer, 11-First pad, 12-Second pad, 13-Second sliding layer, 14-Local weakening plate, 15-Second perforated plate, 16-First perforated plate, 111-Eighth circular hole, 121-Ninth circular hole, 21-First flat plate, 22-First reinforcing member, 23-First rib, 211-First elongated hole, 212-First long slot, 231-First circular hole, 31-Second flat plate, 32-Second reinforcing member, 33-Second rib, 311-Second circular hole, 312-Second long slot, 331-Third circular hole, 41-Second elongated hole, 42-Fourth circular hole, 51-Fifth circular hole, 61-Sixth circular hole. Detailed Implementation

[0043] The following detailed description, in conjunction with specific embodiments, provides a further detailed explanation of the reverse friction buckling-resistant energy dissipation support and control method provided by the present invention. The advantages and features of the present invention will become clearer from the following description.

[0044] The following is combined with Figures 1 to 9 The structural composition of the reverse friction anti-buckling energy dissipation support of the present invention is described in detail.

[0045] Example 1

[0046] The present invention will be described below with reference to the accompanying drawings and specific embodiments. A reverse friction buckling-resistant energy dissipation support specifically includes: a non-buckling energy dissipation unit 1, a positive constraint unit 2, a reverse constraint unit 3, a sliding connector 4, a non-sliding connector 5, a pressure plate 6, a sliding bolt 7, a fixing bolt 8, a constraint bolt 9, a first sliding aid layer 10, a first pad 11, a second pad 12, and a second sliding aid layer 13.

[0047] In this embodiment, more preferably, the buckling-free energy dissipation unit includes a locally weakening plate 14, a first perforated plate 16, and a second perforated plate 15. The locally weakening plate 14 has a small net cross-section in the middle and a large net cross-section at both ends.

[0048] In this embodiment, more preferably, the local weakening plate 14 of the buckling-free energy dissipation unit 1 can be processed into a dog bone shape, and the width of the end should be 1.4 times the width of the middle small cross section.

[0049] In this embodiment, more preferably, the two opposing surfaces at the two ends of the local weakening plate 14 are fixedly connected to the first perforated plate 16 and the second perforated plate 15, respectively, and the second perforated plates at the two ends are arranged in a central rotational symmetry with the first perforated plate, that is, the second perforated plates 15 at the two ends and the first perforated plate 16 are located in different directions.

[0050] Specifically, refer to Figure 5 As shown, the upper left surface of the local weakening plate 14 is butt-welded to the first perforated plate 16, and the lower left surface is butt-welded to the second perforated plate 15. The upper right surface of the local weakening plate 14 is butt-welded to the second perforated plate 15, and the lower right surface is butt-welded to the first perforated plate 16.

[0051] In this embodiment, more preferably, the positive constraint unit 2 includes a first plate 21, a first reinforcing member 22, and a first rib 23. The first plate 21 has several first elongated holes 211, the length of which is twice the maximum deformation of the support design. A first elongated slit 212 is also provided at the end of the first plate 21. The first reinforcing member 22 covers the main body area of ​​the first plate 21 and is fixedly connected to it. A portion of the first rib 23 extends to the first reinforcing member 22 and is fixedly connected to both the first plate 21 and the first reinforcing member 22. The first rib 23 also has several first circular holes 231.

[0052] In this embodiment, more preferably, the first reinforcing member 22 is made by directly cutting channel steel, and a slot is opened at the end to facilitate the insertion of the first rib plate 23. The first reinforcing member 22 is welded to the first flat plate 21.

[0053] In this embodiment, more preferably, the reverse constraint unit 3 includes a second plate 31, a second reinforcing member 32, and a second rib 33. The second plate 31 has several second circular holes 311, the positions of which are centered and aligned with the first elongated circular holes 211. A second elongated slit 312 is also provided at the end of the second plate 31. The second reinforcing member 32 covers the main body area of ​​the second plate 31 and is fixedly connected to it. A portion of the second rib 33 extends to the second reinforcing member 32 and is fixedly connected to both the second plate 31 and the second reinforcing member 32. The second rib 33 also has several third circular holes 331.

[0054] In this embodiment, more preferably, the second reinforcing member 32 is made by directly cutting channel steel, and a slot is opened at the end to facilitate the insertion of the second rib plate 33. The second reinforcing member 32 is welded to the second plate 31. The sliding connector 4 has a second elongated hole 41 at one end and a fourth circular hole 42 at the other end. The non-sliding connector 5 has a fifth circular hole 51 at both ends.

[0055] In this embodiment, more preferably, both the sliding connector 4 and the non-sliding connector 5 are made of angle steel.

[0056] In this embodiment, more preferably, the pressure plate 6 is a long rectangular plate with several sixth circular holes 61. The first slip layer 10 has the same planar dimensions as the pressure plate 6 and a thickness of 1 mm. It is made of a commercially available low-friction material, and the first slip layer 10 also has seventh circular holes aligned with the sixth circular holes 61. One end of the first pad 11 has a notch matching the shape of the end of the non-buckling energy dissipation unit 1, and several eighth circular holes 111 are also provided. The positions of the eighth circular holes 111 match the dimensions of the second circular holes 311. The second slip layer 13 has the same planar features as the first pad 11 and is made of a commercially available low-friction material. The second pad 12 is a rectangular plate with several ninth circular holes 121 on its plane. The positions of the ninth circular holes 121 match the spatial positions of the second circular holes 311.

[0057] In this embodiment, more preferably, the first slip-supporting layer 10 is made of PTFE sheet with a thickness of 1 mm. The thickness of the second pad 12 is 2 mm to 4 mm greater than the thickness of the non-buckling energy dissipation unit 1, and the sum of the thicknesses of the first pad 11 and the second slip-supporting layer 13 is 0.5 mm greater than the thickness of the second pad 12. The thickness of the second slip-supporting layer 13 should not be less than 1 mm and should not be greater than half the thickness of the non-buckling energy dissipation unit 1. The second slip-supporting layer is made of PTFE sheet.

[0058] Specifically, the forward constraint unit 2 and the reverse constraint unit 3 are placed opposite each other, keeping the first reinforcing member 22 and the second reinforcing member 32 facing outwards. According to Figure 4The first reinforcing member 22 faces upwards, and the second reinforcing member 32 faces downwards. The buckling-free energy dissipation unit 1 is placed between the positive restraint unit 2 and the negative restraint unit 3, ensuring that the first perforated plate 16 and the second perforated plate 15 are inserted into the first long slot 212 and the second long slot 312. The positive restraint unit 2, the negative restraint unit 3, and the buckling-free energy dissipation unit 1 maintain symmetry along their central axis. Between the positive restraint unit 2 and the negative restraint unit 3, the first pad 11 and the second sliding layer 13 are stacked and symmetrically placed at the four corners of the buckling-free energy dissipation unit 1, while the second pad 12 is placed in the central area, maintaining a 2mm gap between the left and right sides of the buckling-free energy dissipation unit 1 and both the first pad 11 and the second pad 12.

[0059] In this embodiment, more preferably, the first slip-aiding layer 10 and the pressure plate 6 are stacked sequentially on the outer side of the first plate 21, and then the constraint bolts 9 are passed through the sixth circular hole 61, the seventh circular hole, the first elongated circular hole 211, the eighth circular hole 111 or the ninth circular hole 121, and the second circular hole 311, and tightened to fix them. In this way, the positions of the pressure plate 6, the first slip-aiding layer 10, the forward constraint unit 2, the reverse constraint unit 3, the first pad 11, the second pad 12, and the second slip-aiding layer 13 can be fixed.

[0060] In this embodiment, more preferably, the first perforated plate 16 is bolted to its nearest first rib 23 or second rib 33 via a sliding connector 4, and the first perforated plate 16 is slidably connected to the sliding connector 4 via two elongated holes 41 via sliding bolts 7, and the other end of the sliding connector 4 is fixedly connected to the first rib 23 or second rib 33 via fixing bolts 8.

[0061] In this embodiment, more preferably, the second perforated plate 15 is bolted to its nearest first rib 23 or second rib 33 via a non-slip connector 5.

[0062] like Figure 2 Taking the orientation shown as an example, the positive constraint unit 2 is fixedly connected to the buckling-free energy dissipation unit 1 at the right end, and is slidably connected to the buckling-free energy dissipation unit 1 at the left end via a sliding bolt 7. The negative constraint unit 3 is fixedly connected to the buckling-free energy dissipation unit 1 at the left end, and is slidably connected to the buckling-free energy dissipation unit 1 at the right end via a sliding bolt 7.

[0063] Please continue to refer to this. Figures 1 to 9 This embodiment also provides a control method for a reverse friction buckling-resistant energy dissipation brace, which includes the following steps:

[0064] Step S1: Provide reverse friction buckling-resistant energy dissipation support;

[0065] Step S2: When the support is subjected to axial tensile load, the positive constraint unit 2 moves in the same direction as the second end of the non-buckling energy dissipation unit 1, while its first end slides relative to it; the reverse constraint unit 3 moves in the same direction as the first end of the non-buckling energy dissipation unit 1, while its second end slides relative to it; and the positive constraint unit 2 and the reverse constraint unit 3 slide relative to each other, generating friction only at the preset friction interface to achieve frictional energy dissipation.

[0066] When the support is subjected to axial compressive load, the positive restraint unit 2 moves in the opposite direction to the second end of the non-buckling energy dissipation unit 1; the reverse restraint unit 3 moves in the opposite direction to the first end of the non-buckling energy dissipation unit 1; when the non-buckling energy dissipation unit 1 undergoes slight buckling and comes into contact with the positive restraint unit 2 and the reverse restraint unit 3, the positive restraint unit 2 applies a frictional force in the first direction to the upper surface of the non-buckling energy dissipation unit 1, while the reverse restraint unit 3 applies a frictional force in the second direction opposite to the first direction to the lower surface of the non-buckling energy dissipation unit 1. The frictional forces in the first and second directions cancel each other out, thereby suppressing the buckling deformation of the non-buckling energy dissipation unit 1.

[0067] Specifically, when the buckling-free energy dissipation unit 1 is under tension, the positive restraint unit 2 moves to the right along with the right end of the buckling-free energy dissipation unit 1, while its left end can slide. The negative restraint unit 3 moves to the left along with the left end of the buckling-free energy dissipation unit 1, while its right end can slide. Simultaneously, sliding also occurs between the positive restraint unit 2 and the negative restraint unit 3. Due to the presence of the first sliding layer 10 and the second sliding layer 13, friction will only occur on the surface of the second pad 12 between the positive restraint unit 2 and the negative restraint unit 3. The frictional yield force of the support can be adjusted by controlling the lengths of the first pad 11 and the second pad 12. When the deformation received by the buckling-free energy dissipation unit 1 continues to increase, the buckling-free energy dissipation unit 1 will enter the yielding stage, and the support as a whole will exhibit a combined frictional-metal yielding energy dissipation characteristic. If the deformation continues to increase, the first elongated hole 211 and the second elongated hole 41 will simultaneously reach their limit values, restricting the deformation of the support, and the external force will be borne by the positive restraint unit 2 and the negative restraint unit 3.

[0068] Conversely, when the buckling-free energy dissipation unit 1 is compressed, the positive constraint unit 2 moves to the left along with the right end of the buckling-free energy dissipation unit 1, and the negative constraint unit 3 moves to the right along with the left end of the buckling-free energy dissipation unit 1. When the deformation increases to the point that the buckling-free energy dissipation unit 1 undergoes slight buckling and comes into contact with the positive constraint unit 2 and the negative constraint unit 3, the positive constraint unit 2 will apply a leftward frictional force to the upper surface of the buckling-free energy dissipation unit 1, while the negative constraint unit 3 will apply a rightward frictional force to the lower surface of the buckling-free energy dissipation unit 1. The left and right frictional forces can basically cancel each other out, improving the deformation uniformity of the buckling-free energy dissipation unit 1.

[0069] The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. The above embodiments only illustrate several implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A reverse friction buckling-resistant energy dissipation support, characterized in that, include: A buckling-free energy dissipation unit; A positive constraint unit is disposed at one end of the buckling-free energy dissipation unit and slidably connected to that end; A reverse constraint unit is disposed at the other end of the buckling-free energy dissipation unit and fixedly connected to that end; The positive constraint unit and the negative constraint unit are arranged opposite to each other. When the support is subjected to axial load, the positive constraint unit and the negative constraint unit move in opposite directions following the different ends of the buckling-free energy dissipation unit to realize the reverse friction mechanism.

2. The reverse friction buckling-resistant energy dissipation support according to claim 1, characterized in that, The buckling-free energy dissipation unit includes a local weakening plate, a pair of first perforated plates and a pair of second perforated plates. Each end of the local weakening plate is fixedly connected to a first perforated plate and a second perforated plate, and the first perforated plate and the second perforated plate are arranged in a central rotational symmetry.

3. The reverse friction buckling-resistant energy dissipation support according to claim 2, characterized in that, The positive constraint unit includes: A first plate has several first elongated holes for accommodating connectors and providing displacement clearance when the support deforms. The end of the first plate has a first elongated slit. The length of the first elongated hole is greater than or equal to twice the maximum deformation designed for the support. A first reinforcing member is fixed to the first flat plate and covers the main body area of ​​the first flat plate; At least one first rib is fixedly connected to the first flat plate and the first reinforcing member respectively, and part of the first rib extends into the interior of the first reinforcing member. A plurality of first circular holes are also provided on the first rib.

4. The reverse friction buckling-resistant energy dissipation support according to claim 3, characterized in that, The positive constraint unit also includes a pressure plate and a first sliding layer. The first sliding layer is stacked on the outside of the first flat plate, and the pressure plate is stacked on the outside of the first sliding layer. The pressure plate is then fixedly connected to the buckling-free energy dissipation unit by passing through the pressure plate, the first sliding layer, and the first elongated hole in sequence with constraint bolts.

5. The reverse friction buckling-resistant energy dissipation support according to claim 4, characterized in that, The reverse constraint unit includes: A second plate has several second circular holes, the positions of which are aligned with the first elongated circular holes. A second long slit is formed at the end of the second plate. A second reinforcing member is fixed to the second plate and covers the main body area of ​​the second plate; At least one second rib is fixedly connected to the second flat plate and the second reinforcing member respectively, and a portion of the second rib extends into the interior of the second reinforcing member. Several third circular holes are also provided on the second rib.

6. The reverse friction buckling-resistant energy dissipation support according to claim 5, characterized in that, The reverse restraint unit further includes at least one first pad and at least one second sliding layer. The first pad and the second sliding layer are stacked and placed between the corner of the non-buckling energy dissipation unit and the reverse restraint unit. The second pad is provided in the middle of the non-buckling energy dissipation unit.

7. The reverse friction buckling-resistant energy dissipation support according to claim 6, characterized in that, The pressure plate is a long strip plate with several sixth circular holes. The first sliding layer has the same planar dimensions as the pressure plate, and a seventh circular hole aligned with the sixth circular holes is opened on the first sliding layer.

8. The reverse friction buckling-resistant energy dissipation support according to claim 7, characterized in that, The first pad has a notch at one end that matches the shape of the end of the non-buckling energy dissipation unit, and also has several eighth circular holes. The position of the eighth circular holes matches the size of the second circular holes. The plane size of the second sliding layer is the same as that of the first pad. The second pad is a rectangular plate with several ninth circular holes on its plane. The position of the ninth circular holes matches the size of the second circular holes.

9. The reverse friction buckling-resistant energy dissipation support according to claim 8, characterized in that, The thickness of the second pad is 2mm to 4mm greater than the thickness of the non-buckling energy dissipation unit. The sum of the thicknesses of the first pad and the second sliding layer is 0.5mm greater than the thickness of the second pad. The thickness of the second sliding layer is greater than or equal to 1mm and less than or equal to half the thickness of the non-buckling energy dissipation unit.

10. A method for controlling reverse friction buckling-resistant energy dissipation supports, characterized in that, include: Step S1: Provide the reverse friction buckling-resistant energy dissipation support as described in any one of claims 1 to 9; Step S2: When the support is subjected to axial tensile load, the positive constraint unit moves in the same direction as the second end of the non-buckling energy dissipation unit, while its first end slides relative to it; the reverse constraint unit moves in the same direction as the first end of the non-buckling energy dissipation unit, while its second end slides relative to it; and the positive constraint unit and the reverse constraint unit slide relative to each other, generating friction only at the preset friction interface to achieve frictional energy dissipation. When the support is subjected to axial compressive load, the positive restraint unit moves in the opposite direction to the second end of the non-buckling energy dissipation unit; the reverse restraint unit moves in the opposite direction to the first end of the non-buckling energy dissipation unit; when the non-buckling energy dissipation unit undergoes slight buckling and comes into contact with the positive restraint unit and the reverse restraint unit, the positive restraint unit applies a frictional force in a first direction to the upper surface of the non-buckling energy dissipation unit, while the reverse restraint unit applies a frictional force in a second direction opposite to the first direction to the lower surface of the non-buckling energy dissipation unit. The frictional forces in the first and second directions cancel each other out, thereby suppressing the buckling deformation of the non-buckling energy dissipation unit.

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