Self-resetting anti-buckling support and assembly method

Abstract

The present invention discloses a self-resetting anti-buckling support, including a self-resetting device and an anti-buckling support device, the anti-buckling support and the self-resetting device are arranged in parallel; the anti-buckling support device includes an inner sleeve 5 connector, an energy-absorbing inner core 2, a pad 3, a filling plate 4, an inner sleeve 5, an outer sleeve 6 and an outer sleeve 6 connector; the self-resetting device includes a disc spring baffle, a disc spring reaction piece, a guide rod, an anchor plate, a reset rib 12 and a disc spring; the self-resetting device is placed in the inner sleeve 5 of the anti-buckling support, the guide rod passes through the disc spring and is anchored on the disc spring baffle and the disc spring reaction piece on both sides of the disc spring, and the reset rib 12 is anchored on the anchor plate on one side and on the disc spring baffle on the other side. The present invention provides a greater deformation capacity for the support while ensuring the reset capacity of the support by connecting the reset rib 12 and the disc spring in series, so as to achieve the design goal of the building structure not collapsing in a super-large earthquake.

Description

Technical Field

[0001] The invention relates to a self-resetting anti-buckling brace, in particular to a lateral force resisting member (also an energy-absorbing shock-absorbing metal damper) mainly used in the field of building structure engineering, and belongs to the technical field of civil engineering structure shock absorption. Background Art

[0002] Earthquakes are extremely destructive and uncertain, which may lead to damage or even collapse of building structures even if they are designed in accordance with code requirements. Even if some structures do not collapse after an earthquake, they may still produce residual deformation that affects normal use. Traditional self-resetting anti-buckling braces are mainly composed of self-resetting devices and anti-buckling braces. Anti-buckling braces are a new type of brace that has the dual functions of ordinary braces and metal dampers. They can provide lateral stiffness and strength to the main structure under small earthquakes, and use their own plastic deformation to consume seismic energy during large earthquakes, reducing or even avoiding structural damage. The support then returns to its initial state through the reset force provided by the self-resetting device.

[0003] However, the existing self-resetting devices have many drawbacks and are difficult to meet the requirements of practical engineering applications: insufficient deformation capacity, unable to meet the normal operation under large or super large earthquakes; complex assembly process, and the self-resetting device with steel strand as the reset material has the problem of difficulty in applying prestress; the self-resetting device with shape memory alloy wire as the reset material is expensive, and the mechanical properties are unstable, and fluctuate greatly with temperature changes. The deformation capacity of the existing self-resetting buckling-resisting support energy-absorbing inner core 2 is limited by the maximum tensile deformation of the reset rib 12, and it is difficult to give full play to the energy-absorbing capacity of the energy-absorbing inner core 2.

[0004] Therefore, how to provide a self-resetting anti-buckling support and an assembly method has become a problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] In view of this, the present invention provides a self-resetting anti-buckling support and an assembly method, wherein a guide rod in the self-resetting device passes through a disc spring and is anchored on the disc spring baffle and disc spring reaction member on both sides of the disc spring, and a reset rib 12 is anchored on one side of the anchor plate and on the other side of the disc spring baffle. The present invention provides a greater deformation capacity for the support while ensuring the reset capacity of the support by connecting the reset rib 12 and the disc spring in series, thereby achieving the design goal of the building structure not collapsing in a super-large earthquake.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A self-resetting anti-buckling support, comprising: a self-resetting device and an anti-buckling support device, wherein the self-resetting device is placed in the inner sleeve 5 of the anti-buckling support; the anti-buckling support device comprises an inner sleeve 5 connector, an energy-absorbing inner core 2, a pad 3, a filling plate 4, an inner sleeve 5, an outer sleeve 6 and an outer sleeve 6 connector; the self-resetting device comprises a disc spring baffle, a disc spring reaction piece, a guide rod, an anchor plate, a reset rib 12 and a disc spring; the guide rod passes through the disc spring and is anchored on the disc spring baffle and the disc spring reaction piece, and the reset rib 12 is anchored on one side of the anchor plate and on the other side of the disc spring baffle.

[0008] Furthermore, the inner sleeve 5 connecting piece includes a T-shaped plate and stiffening ribs, and the stiffening ribs are welded at both ends of the T-shaped plate; the outer sleeve 6 connecting piece includes a T-shaped plate, an angle steel and stiffening ribs, and the stiffening ribs are welded at both ends of the T-shaped plate, and the angle steel is fixedly connected to the T-shaped plate.

[0009] Furthermore, the anti-buckling support includes an energy-absorbing inner core 2, an inner sleeve 5 and an outer sleeve 6, wherein the energy-absorbing inner core 2 is placed between the inner sleeve 5 and the outer sleeve 6, and a gap is left between the energy-absorbing inner core 2 and the inner sleeve 5 and the outer sleeve 6.

[0010] Furthermore, the anti-buckling support device also includes a pad 3 and a filling plate 4, the pad 3 is placed between the energy-absorbing inner core 2 and the inner sleeve 5 and the outer sleeve 6, the pad 3 is welded to the energy-absorbing inner core 2, and the pad 3 is welded to the inner sleeve 5 and the outer sleeve 6; the filling plate 4 is placed on both sides of the energy-absorbing inner core 2 with a certain gap, and the filling plate 4 is welded to the inner sleeve 5.

[0011] Furthermore, the anchor plate, the disc spring baffle plate and the disc spring reaction piece are all provided with through holes through which the reset rib 12 is inserted; the disc spring reaction piece and the disc spring baffle plate are all provided with through holes for anchoring the guide rod.

[0012] A method for assembling a self-resetting anti-buckling brace comprises the following steps:

[0013] The first step is to weld the stiffener to the T-shaped plate to form an inner sleeve 5 connector and weld it to the inner sleeve 5; weld the backing plate 3 placed between the reinforcement section of the energy-absorbing inner core 2 and the inner sleeve 5 to the inner sleeve 5 and the energy-absorbing inner core 2, place the filler plate 4 on both sides of the energy-absorbing inner core 2 and weld it to the inner sleeve 5, and weld the backing plate 3 placed between the reinforcement section of the energy-absorbing inner core 2 and the outer sleeve 6 to the outer sleeve 6 and the energy-absorbing inner core 2 to form an anti-buckling support device;

[0014] In the second step, the square plate, the square tube and the baffle plate form a disc spring reaction piece, the guide rod passes through the combined disc spring and is anchored on the disc spring baffle plate and the disc spring reaction piece respectively, and the disc spring reaction piece is placed in the inner sleeve 5, and one end of the disc spring reaction piece is in contact with the inner and outer sleeves 6;

[0015] In the third step, one side of the reset rib 12 is anchored at the disc spring baffle, and the other side is anchored at the anchor plate. The T-shaped plate, angle steel and stiffening ribs form the outer tube 6 connecting piece, and the outer tube connecting piece is tightly connected to the outer tube 6.

[0016] The beneficial effects of the present invention are:

[0017] 1. Strong deformation ability: In the self-resetting device of the present invention, the combined disc spring is placed between the disc spring baffle and the disc spring reaction member through a guide rod. One end of the reset rib 12 is anchored at the anchor plate, and the other end is anchored at the disc spring baffle. The reset rib 12 and the combined disc spring are connected in series to ensure the reset ability of the support while providing a greater deformation ability for the support.

[0018] 2. High flexibility: The present invention can adjust the ratio between the reset rib 12 and the combined disc spring to meet different engineering requirements and has certain engineering significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the assembly process of the anti-buckling brace device of the present invention.

[0021] Figure 2 It is a schematic diagram of the assembly process of the present invention.

[0022] Figure 3 It is an exploded view of the present invention.

[0023] Figure 4 It is a schematic diagram of the overall assembly of the present invention.

[0024] Figure 5 1 is a force-displacement hysteresis curve of an embodiment of the present invention.

[0025] The numbers in the figure are

[0026] 1 is an inner sleeve connector, which is composed of a T-shaped plate 1-1 and stiffening ribs 1-2. The stiffening ribs ensure the stability of the connector.

[0027] 2 is a straight-line energy-absorbing inner core.

[0028] 3 is a pad, which is placed between the reinforcement section of the energy-absorbing inner core 2 and the inner sleeve 5, and is welded to the inner sleeve 5 and the energy-absorbing inner core 2. The pad 3 placed between the reinforcement section of the energy-absorbing inner core 2 and the outer sleeve 6 is welded to the outer sleeve 6 and the energy-absorbing inner core 2.

[0029] 4 is a filling plate, which is placed along the width direction of the energy dissipation core 2.

[0030] 5 is an inner sleeve, one end of which is welded to the backing plate 3, and the other end is welded to the inner sleeve 5 connecting piece.

[0031] 6 is an outer sleeve, one end of which is welded to the energy dissipation inner core 2, and the other end is welded to the outer sleeve 6 connector.

[0032] 7 is the disc spring baffle.

[0033] 8 is a disc spring reaction piece, which is composed of a square plate 8-1, a square tube 8-2 and a baffle 8-3. The baffle of the disc spring reaction piece is in contact with the inner and outer sleeves.

[0034] 9 is a combined disc spring.

[0035] 10 is a guide rod, which is anchored on the disc spring baffle and the disc spring reaction piece square plate through a combined disc spring.

[0036] 11 is an anchoring plate, which contacts one side of the inner and outer sleeves.

[0037] 12 is a reset rib, one side of the reset rib 12 is anchored on the anchor plate, and the other side is anchored on the disc spring baffle.

[0038] 13 is an outer sleeve connector, which is composed of a T-shaped plate 13-1, an angle steel 13-2 and a stiffening rib 13-3. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] refer to Figure 1-4 The specific implementation process of the self-resetting buckling-restrained brace can be carried out according to the following steps:

[0041] The first step is to assemble the anti-buckling support. The stiffener 1-2 is welded to the T-shaped plate 1-1 to form the inner sleeve 5 connector 1, and is welded to the inner sleeve 5; the pad 3 placed between the reinforcement section of the energy dissipation inner core 2 and the inner sleeve 5 is welded to the inner sleeve 5 and the energy dissipation inner core 2, the filler plate 4 is placed on both sides of the energy dissipation inner core 2 and is welded to the inner sleeve 5, and the pad 3 placed between the reinforcement section of the energy dissipation inner core 2 and the outer sleeve 6 is welded to the outer sleeve 6 and the energy dissipation inner core 2. The specific process is as follows: Figure 1 As shown;

[0042] The second step is to assemble the self-resetting device. The square plate 8-1, the square tube 8-2 and the baffle 8-3 form a disc spring reaction piece 8, and the guide rod 10 passes through the combined disc spring 9 and is anchored on the disc spring baffle 7 and the disc spring reaction piece 8 respectively, and the disc spring reaction piece is placed in the inner sleeve 5, and one end of the disc spring reaction piece is in contact with the inner and outer sleeves.

[0043] The third step is to install the reset rib 12 and the anchor plate 11. One side of the reset rib 12 is anchored at the disc spring baffle 7, and the other side is anchored at the anchor plate 11. The T-shaped plate 13-1, the angle steel 13-2 and the stiffening rib 13-3 form the outer tube 6 connector 13, and the outer tube connector is tightly connected to the outer tube 6. The specific process is as follows: Figure 2 shown.

[0044] Explosion diagram of self-centering buckling-resisting brace Figure 3 As shown in the figure, the overall assembly diagram of the damper is as follows Figure 4 shown.

[0045] The buckling-resistance bracing device of the present invention is composed of an energy-absorbing inner core 2, an inner sleeve 5, an outer sleeve 6, a pad 3 and a filling plate 4. The energy-absorbing inner core 2 is arranged symmetrically and placed between the inner and outer sleeves 6. A pad 3 is placed on one side of the energy-absorbing inner core 2 and welded to the inner sleeve 5, and a pad 3 is placed on the other side and welded to the outer sleeve 6 to ensure coordinated deformation of the energy-absorbing inner core 2 and the self-resetting system; a filling plate 4 is placed in the width direction of the energy-absorbing inner core 2, and the filling plate 4 is welded to the inner sleeve 5; the inner and outer sleeves and the filling plate 4 serve as constraint components of the energy-absorbing inner core 2 to prevent the energy-absorbing inner core 2 from buckling along the strong and weak axis direction when it is compressed; a gap is left between the inner core and the inner and outer sleeves and the filling plate 4 to ensure expansion and deformation of the inner core.

[0046] In the present invention, the self-resetting device and the anti-buckling support device are arranged in parallel, and the two are deformed in coordination under the action of load.

[0047] Based on the problem that the deformation capacity of the self-resetting support is limited by the deformation capacity of the reset material, the self-resetting anti-buckling support is designed by combining the advantages of different reset materials. The present invention can withstand greater deformation than the self-resetting anti-buckling that generally uses the reset rib 12 as the reset material through the reasonable design of the self-resetting device. The support reset device is composed of a reset rib 12 and a combined disc spring 9 in series. The combined disc spring 9 is placed between the disc spring baffle 7 and the disc spring reaction piece 8 through a guide rod 10. One side of the reset rib 12 is anchored at the anchor plate 11, and the other side is anchored on the disc spring baffle 7; the energy-absorbing inner core 2 is welded with the inner sleeve 5 and the outer sleeve 6 to achieve the purpose of coordinated deformation; the inner and outer sleeves are placed between the anchor plate 11 and the disc spring reaction piece 8. When the support is in the loading stage, the inner sleeve 5 and the outer sleeve 6 push the anchor plate 11 and the disc spring reaction piece 8 to move, so that the steel bars anchored on the anchor plate 11 are stretched, and at the same time, the combined disc spring 9 is compressed under the action of the disc spring reaction piece 8 and the disc spring baffle 7; when the support is in the unloading stage, the anchor plate 11 and the disc spring reaction piece 8 push the inner sleeve 5 and the outer sleeve 6 to move, and the reset force provided by the reset system is used to provide the support with reset capability.

[0048] In the self-resetting device of the present invention, the reset rib 12 and the disc spring 9 are connected in series to ensure the reset ability of the support while providing a greater deformation ability for the support, thereby achieving the design goal of the building structure not to collapse due to a super-large earthquake.

[0049] Embodiment (Self-Resetting Buckling-Restrained Brace)

[0050] Self-resetting anti-buckling support: The energy-absorbing inner core 2 is 6mm thick, and the reinforcement section is 300mm long; the energy-absorbing section is 1200mm long; the energy-absorbing inner core 2 is arranged symmetrically up and down. The pad 3 is 300mm long, and the pad 3 on one side is welded to the energy-absorbing inner core 2 and the inner tube, and the pad 3 on one side is welded to the energy-absorbing inner core 2 and the outer tube; a certain gap is left between the energy-absorbing inner core 2 and the inner and outer tubes to ensure the buckling of the energy-absorbing inner core 2 in the weak axis direction. The filling plate 4 is 1200mm long, placed on both sides of the energy-absorbing inner core 2 and welded to the inner sleeve 5. The inner sleeve 5 is 1950mm long and 10mm thick; the outer sleeve 6 is 1950mm long and 10mm thick. The disc spring baffle is 20mm thick, with a circular hole with the same diameter as the guide rod opened in the center of the plate. There are 4 holes on the plate, distributed around the middle of the disc spring baffle, for the reset rib 12 to pass through; the disc spring reaction piece is a combination piece, with a length of 760mm, and a circular hole with the same diameter as the guide rod opened at the center of the end; the guide rod is 725mm long, and its diameter is selected according to the disc spring specification. The guide rod passes through the combined disc spring and is anchored on the disc spring baffle and the disc spring reaction piece. The anchor plate is 30mm thick, with 4 holes on the plate, with the same hole diameter as the disc spring baffle, distributed around the middle of the anchor plate. In the embodiment, the energy-absorbing inner core 2 and the inner and outer sleeves 6 are made of Q235 steel with a yield strength of 290Mpa, and the anchor plate, disc spring baffle and disc spring reaction piece are made of Q460 steel. The reset material is prestressed steel strand and disc spring. The yield strength of the prestressed steel strand is 1403MPa. The length is 1950mm. There are 4 strands. One end is anchored on the anchor plate and the other end is anchored on the disc spring baffle. The disc spring adopts the A series disc spring in the specification.

[0051] The above example is numerically simulated by ABAQUS2020 software, and the obtained force and displacement curves are shown in Figure 5. The bearing capacity of the damper in general engineering is 50t~200t, and the bearing capacity of this damper is 120t, which can meet the needs of general engineering; the deformation of the pure reset rib 12-type self-resetting anti-buckling support is about 1% of the support length, and the deformation of the self-resetting anti-buckling support proposed in this paper can reach 2% of the support length, and the deformation capacity is doubled. It can be seen that the self-resetting anti-buckling support has better deformation capacity.

[0052] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0053] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A self-resetting anti-buckling support, characterized in that it comprises: A self-resetting device and an anti-buckling support device, wherein the self-resetting device is placed in the inner sleeve of the anti-buckling support device; the anti-buckling support device includes an inner sleeve connector, an energy-absorbing inner core, a pad, a filling plate, an inner sleeve, an outer sleeve and an outer sleeve connector; the inner sleeve connector is welded to the inner sleeve, and the outer tube connector is tightly connected to the outer sleeve; the self-resetting device includes a disc spring baffle, a disc spring reaction piece, a guide rod, an anchor plate, a reset rib and a disc spring; a square plate, a square tube and a baffle constitute a disc spring reaction piece, the guide rod passes through the disc spring and is anchored on the disc spring baffle and the disc spring reaction piece, and the disc spring reaction piece is placed in the inner sleeve, one end of which is in contact with the inner and outer sleeves; the inner and outer sleeves are placed between the anchor plate and the disc spring reaction piece; one side of the reset rib is anchored on the anchor plate, and the other side is anchored on the disc spring baffle; The anchor plate, the disc spring baffle plate and the disc spring reaction piece are all provided with through holes through which the reset ribs are inserted; the disc spring reaction piece and the disc spring baffle plate are all provided with through holes for anchoring the guide rods; The energy-absorbing inner core is placed between the inner sleeve and the outer sleeve, and a gap is left between the energy-absorbing inner core and the inner sleeve and the outer sleeve; the energy-absorbing inner core is symmetrically arranged and placed between the inner and outer sleeves, a backing plate is placed on one side of the energy-absorbing inner core and welded to the inner sleeve, and a backing plate is placed on the other side and welded to the outer sleeve; a filling plate is placed in the width direction of the energy-absorbing inner core, and the filling plate is welded to the inner sleeve; The inner sleeve connector includes a T-shaped plate and stiffening ribs, and the stiffening ribs are welded at both ends of the T-shaped plate; the outer sleeve connector includes a T-shaped plate, an angle steel and stiffening ribs, and the stiffening ribs are welded at both ends of the T-shaped plate, and the angle steel is fixedly connected to the T-shaped plate.

2. A method for assembling a self-resetting buckling-restrained brace as claimed in claim 1, characterized in that: The steps include: The first step is to weld the stiffener to the T-shaped plate to form an inner sleeve connector and weld it to the inner sleeve; weld the pad placed between the energy-absorbing inner core reinforcement section and the inner sleeve to the inner sleeve and the energy-absorbing inner core, place the filler plate on both sides of the energy-absorbing inner core and weld it to the inner sleeve, and weld the pad placed between the energy-absorbing inner core reinforcement section and the outer sleeve to the outer sleeve and the energy-absorbing inner core to form an anti-buckling support device; In the second step, the square plate, the square tube and the baffle plate form a disc spring reaction piece, the guide rod passes through the combined disc spring and is anchored on the disc spring baffle plate and the disc spring reaction piece respectively, and the disc spring reaction piece is placed in the inner sleeve, and one end of the disc spring reaction piece is in contact with the inner and outer sleeves; In the third step, one side of the reset rib is anchored at the disc spring baffle, and the other side is anchored at the anchor plate. The T-shaped plate, angle steel and stiffening ribs form an outer tube connector, and the outer tube connector is tightly connected to the outer tube.

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