A fully bolted self-resetting buckling restraint brace

Abstract

A self-resetting buckling-restrained brace with all-bolted connection comprises an outer restraint tube consisting of a lateral restraint plate, a first restraint group, and a second restraint group. This outer restraint tube serves as both the lateral restraint component of the energy-dissipating inner core and the axial force transmission component of the reset device. This invention combines energy dissipation and reset capabilities, effectively reducing the residual displacement response of the structure after an earthquake and improving its post-earthquake recoverability. The two symmetrically arranged energy-dissipating core plates effectively reduce the constraint stiffness requirements of the energy-dissipating core plates on the restraint components, thereby reducing the risk of local instability of the lateral restraint components under support compression. Furthermore, the all-bolted connection allows for convenient replacement of damaged energy-dissipating core plates after an earthquake, facilitating the rapid restoration of the structure to normal functionality after an earthquake.

Description

Technical Field

[0001] This invention relates to the field of energy dissipation and vibration reduction technology in civil engineering, and in particular to a self-resetting buckling restraint brace with all bolted connections. Background Technology

[0002] Self-resetting buckling restraint brace technology is currently in a stage of rapid development. This technology has good hysteresis performance and energy dissipation capacity. The device integrates energy dissipation and reset capabilities at the component level, which can effectively reduce the residual displacement response of the structure after a strong earthquake and shows broad application prospects in the field of earthquake prevention and disaster reduction.

[0003] Currently, energy dissipation systems based on preloaded disc springs in self-resetting buckling-restrained braces typically employ a flat energy-dissipating core. When this core is under compression, it demands high constraint stiffness from the lateral restraint components. Increasing the thickness of the plate has very limited effect on improving the restraint effect of the lateral restraint components. For high-load-bearing capacity self-resetting buckling-restrained braces, when the energy-dissipating core experiences multi-wave buckling under compression, the resulting lateral pressure can pose a risk of localized buckling of the lateral restraint components, thus affecting the function of the reset system. Summary of the Invention

[0004] To address the technical problem of existing support and constraint structures having high constraint stiffness requirements for lateral constraint components when the energy-dissipating inner core is under pressure, and to reduce the risk of local buckling of the constraint components, the purpose of this invention is to provide a self-resetting buckling constraint support with all bolted connections.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A fully bolted self-resetting buckling restraint brace, characterized in that it includes an outer restraint member and a reset device disposed within the outer restraint member, the reset device including a guide tube, at least one disc spring device sleeved outside the guide tube, several blocks respectively provided on opposite sides of the inner wall of the outer restraint member, the disc spring device being located between any two of the blocks, and the two ends of the disc spring device respectively abutting against the two blocks.

[0007] Energy-dissipating core plates are respectively provided on opposite sides of the external constraint member, and a gap is provided between the energy-dissipating core plates and the external constraint member;

[0008] It also includes a first connector and a second connector. One side of the first connector is connected to one end of the two energy-consuming core plates, and one side of the second connector is connected to the other end of the two energy-consuming core plates. One end of the conduit is fixedly connected to the first connector, and the other end of the conduit is axially movable to adapt to the guide hole of the second connector.

[0009] Furthermore, the energy-consuming core board includes a first energy-consuming component, which includes a first yielding section and a first connecting section disposed at both ends of the first yielding section. The cross-sectional area of ​​the first yielding section is smaller than the cross-sectional area of ​​the first connecting section, and a first transition section with a gradually increasing cross-sectional area from the first yielding section to the first connecting section is provided between the first yielding section and the first connecting section.

[0010] Furthermore, the energy-consuming core board also includes a second energy-consuming component perpendicularly disposed to the first energy-consuming component. The second energy-consuming component includes a second yielding section and a second connecting section disposed at both ends of the second yielding section. The cross-sectional area of ​​the second yielding section is smaller than the cross-sectional area of ​​the second connecting section, and a second transition section with a gradually increasing cross-sectional area from the second yielding section to the second connecting section is provided between the second yielding section and the second connecting section.

[0011] Furthermore, the external constraint includes a first constraint group and a second constraint group. The first constraint group includes two oppositely arranged first constraint members, and the second constraint group includes two oppositely arranged second constraint members. The first constraint members and the second constraint members are connected to each other.

[0012] Furthermore, a lateral constraint plate is provided between the first constraint member and the second constraint member, and the two lateral constraint plates are provided with a gap from the first yielding section, and the thickness of the lateral constraint plate is not less than the thickness of the first energy dissipation member.

[0013] Furthermore, the first constraint member and the second constraint member are respectively provided with a first reinforcing plate and a second reinforcing plate along their length direction.

[0014] Furthermore, the two ends of the conduit are respectively fitted with the disc spring device, the two disc spring devices are respectively located between the two stops, and the two ends of the two disc spring devices respectively abut against the corresponding two stops.

[0015] Furthermore, the disc spring device includes a disc spring body, and the disc spring body has pressing parts at both ends that are threaded with the guide tube. The two pressing parts press the disc spring body so that the disc spring body has a pre-pressurization force, and the pressing parts abut against the stop block.

[0016] Furthermore, one side of the first connector and the second connector is provided with two connecting parts, each connecting part including four connecting angle steels. Each connecting angle steel includes a first connecting plate and a second connecting plate that are connected to each other. The first connecting plate and the second connecting plate are provided with connecting holes that are staggered to each other. The first energy-consuming component is locked to the first connecting plate, and the second energy-consuming component is locked to the second connecting plate.

[0017] Furthermore, the connecting portion includes two opposite and spaced-apart connecting angle steels, and the gap between the second connecting plates is used to accommodate the second energy-consuming component.

[0018] Furthermore, the first connector and the second connector are respectively provided with connecting tubes. The inner hole of the connecting tube in the first connector is a threaded hole, and the inner hole of the connecting tube in the second connector is a smooth hole. The left end of the conduit is connected to the connecting tube in the first connector by a thread, and the right end of the conduit is inserted into the connecting tube in the second connector.

[0019] The beneficial effects of this invention are:

[0020] 1. This invention proposes a fully bolted self-resetting buckling-restrained brace, comprising an outer restraint member and a reset device disposed within the outer restraint member. The reset device includes a guide tube, with at least one disc spring device sleeved outside the guide tube. Several stops are respectively provided on opposite sides of the inner wall of the outer restraint member. The disc spring device is located between any two stops, and its two ends abut against the two stops respectively. The outer restraint member serves as both a lateral restraint component for the energy-dissipating core plate and an axial force transmission component for the reset device. This invention combines energy dissipation and reset capabilities, effectively reducing the post-earthquake residual displacement response of the structure and improving its post-earthquake recoverability.

[0021] 2. This invention proposes a fully bolted self-resetting buckling restraint brace. Energy-dissipating core plates are respectively provided on opposite sides of the outer restraint member, and each energy-dissipating core plate includes a first energy-dissipating element and a second energy-dissipating element perpendicular to the first energy-dissipating element. When these core plates are subjected to pressure, the first and second energy-dissipating elements can mutually restrain each other. This mutual restraint helps reduce the stiffness requirements of the core plates on the restraint tube, thereby optimizing and saving the amount of steel used in the outer restraint member.

[0022] 3. This invention proposes a fully bolted self-resetting buckling-restrained brace. The external restraints include a first restraint group and a second restraint group. The first restraint group includes two opposing first restraint members, and the second restraint group includes two opposing second restraint members. The first and second restraint members are connected to each other by bolts. Lateral restraint plates are provided in both the first and second restraint members, and these lateral restraint plates are also connected to the first and second restraint members by bolts. When an earthquake or other external force damages the energy-dissipating core panel, the damaged component can be easily replaced by disassembling the connecting bolts without affecting the reset function of the entire support device. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an overall schematic diagram of the present invention;

[0025] Figure 2 This is an exploded view of the present invention;

[0026] Figure 3 This is the front view of the present invention;

[0027] Figure 4 This is a schematic diagram of the assembly of the external constraint component of the present invention;

[0028] Figure 5 for Figure 3 Sectional view along axis AA;

[0029] Figure 6 This is a schematic diagram of the reset device of the present invention;

[0030] Figure 7 This is a schematic diagram of the second connector of the present invention;

[0031] Figure 8 This is a schematic diagram of the energy-consuming core board of the present invention.

[0032] In the diagram, 10 is the external constraint; 101 is the lateral constraint plate; 102 is the first constraint; 103 is the second constraint; 20 is the energy-dissipating core plate; 301 is the conduit; 302 is the disc spring device; 303 is the stop block; 304 is the baffle plate; 40 is the fixing nut; 501 is the first connector; 502 is the second connector; 503 is the connecting angle steel; 5031 is the first connecting plate; 5032 is the second connecting plate; 504 is the ear plate; 505 is the steel plate; 506 is the connecting pipe; 60 is the pad; 70 is the reinforcing plate; 80 is the first energy-dissipating component; and 90 is the second energy-dissipating component. Detailed Implementation

[0033] The following combination Figure 1-8 The present invention will be described in detail below.

[0034] A fully bolted self-resetting buckling restraint brace includes an outer restraint member 10 and a reset device disposed within the outer restraint member 10. The reset device includes a conduit 301, with at least one disc spring device 302 sleeved on the outside of the conduit 301. Several stops 303 are respectively provided on opposite sides of the inner wall of the outer restraint member 10, with the disc spring device 302 located between any two stops 303, and its two ends abutting against the two stops 303 respectively. Energy-dissipating core plates 20 are respectively provided on opposite sides of the outer restraint member 10, with a gap between the energy-dissipating core plates 20 and the outer restraint member 10. The outer restraint member 10 serves both as a lateral restraint component for the energy-dissipating core plates 20 and as an axial force transmission component for the reset device. The fully bolted self-resetting buckling restraint brace also includes a first connector 501 and a second connector 502. One side of the first connector 501 is connected to one end of the two energy-dissipating core plates 20, and one side of the second connector 502 is connected to the other end of the two energy-dissipating core plates 20. One end of the conduit 301 is fixedly connected to the first connector 501, and the other end of the conduit 301 is axially movable to adapt to the guide hole of the second connector 502.

[0035] In this embodiment, the energy-consuming core board 20 includes a first energy-consuming component 80, which includes a first yielding section and a first connecting section disposed at both ends of the first yielding section. The cross-sectional area of ​​the first yielding section is smaller than that of the first connecting section, and a first transition section with a gradually increasing cross-sectional area from the first yielding section to the first connecting section is provided between the first yielding section and the first connecting section.

[0036] In this embodiment, the energy-dissipating core plate 20 further includes a second energy-dissipating component 90 perpendicularly disposed to the first energy-dissipating component 80. The second energy-dissipating component 90 includes a second yielding section and second connecting sections disposed at both ends of the second yielding section. The cross-sectional area of ​​the second yielding section is smaller than that of the second connecting section, and a second transition section with a gradually increasing cross-sectional area from the second yielding section to the second connecting section is provided between the second yielding section and the second connecting section. When the energy-dissipating core plate 20 is subjected to pressure, its first energy-dissipating component 80 and second energy-dissipating component 90 can restrain each other. This mutual restraint helps to reduce the stiffness requirements of the restraining components on the energy-dissipating core plate 20, thereby optimizing and saving the amount of steel used in the external restraining component 10.

[0037] Specifically, the energy-dissipating core plate 20 preferably has a T-shaped cross-section energy-dissipating core. The T-shaped cross-section energy-dissipating core can be made of steel with a low yield point (such as Q235, LYP100, LYP225), and the first transition section and the second transition section, as well as the first yield section and the second yield section, need to be processed by wire cutting. Polytetrafluoroethylene tape can be pasted on the surface of the first yield section and the second yield section. The second energy-dissipating component 90 has evenly distributed bolt holes along one side, and the first energy-dissipating component 80 has a reinforcing plate 70 welded along its length, and also has elongated holes in the middle and at both ends. This increases the structural stiffness and local stability of the energy-dissipating core plate 20, and also enhances the load-bearing capacity of the energy-dissipating core plate 20.

[0038] In this embodiment, as Figure 3 As shown, the external constraint 10 includes a first constraint group and a second constraint group. The first constraint group includes two oppositely arranged first constraint members 102, and the second constraint group includes two oppositely arranged second constraint members 103. The first constraint members 102 and the second constraint members 103 are connected to each other.

[0039] Specifically, the first constraint member 102 and the second constraint member 103 are respectively provided with a first reinforcing plate 70 and a second reinforcing plate 70 along their length direction.

[0040] Specifically, the first constraint member 102 is preferably an I-shaped member, wherein the second constraint member 103 has a bolt hole at its right end, and a reinforcing plate 70 is welded onto the second constraint member 103. The I-shaped member increases the structural stiffness and local stability of the first constraint member 102, and also enhances the load-bearing capacity of the first constraint member 102.

[0041] In this embodiment, a lateral constraint plate 101 is provided between the first constraint member 102 and the second constraint member 103. The two lateral constraint plates 101 have gaps with the first yielding section, and the thickness of the lateral constraint plate 101 is not less than the thickness of the first energy-dissipating member 80. Preferably, the thickness of the lateral constraint plate 101 is 2 mm greater than the thickness of the second energy-dissipating member 90 provided on the energy-dissipating core plate 20.

[0042] In this embodiment, disc spring devices 302 are respectively sleeved at both ends of the conduit 301. The two disc spring devices 302 are respectively located between two stops 303, and the two ends of the two disc spring devices 302 abut against the corresponding two stops 303. The disc spring device 302 includes a disc spring body, and the two ends of the disc spring body are provided with clamping parts that are threadedly engaged with the conduit 301. The two clamping parts clamp the disc spring body so that the disc spring body has a pre-clamping force. The pre-clamping force value is determined according to the design requirements, and the clamping parts abut against the stops 303. In this embodiment, two connecting parts are provided on one side of the first connector 501 and the second connector 502. The connecting parts include four connecting angle steels 503. The connecting angle steels 503 include a first connecting plate 5031 and a second connecting plate 5032 that are connected to each other. The first connecting plate 5031 and the second connecting plate 5032 are provided with mutually staggered connecting holes, and the first energy dissipating component 80 is locked to the first connecting plate 5031, and the second energy dissipating component 90 is locked to the second connecting plate 5032. Connecting angle steel 503 can provide important support, connection and fixation for self-resetting buckling restraint brace joints with all-bolted connections.

[0043] In this embodiment, the connecting part includes two opposite and spaced connecting angle steels 503, and the gap between the second connecting plates 5032 is used to accommodate the second energy-consuming component 90.

[0044] In this embodiment, the first connector 501 and the second connector 502 are respectively provided with connecting tubes 506. The inner hole of the connecting tube 506 in the first connector 501 is a threaded hole, and the inner hole of the connecting tube 506 in the second connector 502 is a smooth hole.

[0045] Specifically, the first connector 501 and the second connector 502 consist of an ear plate 504, a steel plate 505, a connecting angle steel 503, and a connecting tube 506. One end of the ear plate 504 is connected to the steel plate 505. The connecting tube 506 is located at the center of the other side of the steel plate 505. The connecting angle steel 503 is located on the same side of the steel plate 505 where the connecting tube 506 is located, and the connecting angle steel 503 is symmetrically distributed at the upper and lower ends of the steel plate 505 with respect to the connecting tube 506. The connecting tube 506 forming the first connector 501 has internal threads, which can be threaded to the left end of the conduit 301. The connecting tube 506 forming the second connector 502 has a smooth interior, which can be inserted into the conduit 301. The outer diameter of the conduit 301 is smaller than the inner diameter of the connecting tube 506 forming the second connector 502. Preferably, the outer diameter of the conduit 301 is 1 mm smaller than the connecting tube 506 forming the second connector 502, so as to ensure that the right end of the conduit 301 can be inserted into the connecting tube 506 forming the second connector 502. The length of the overlapping portion of the conduit 301 and the connecting pipe 506 forming the second connector 502 should be greater than the maximum target displacement. The remaining length of the connecting pipe 506 forming the second connector 502 should also be greater than the maximum target displacement. The left end of the energy-dissipating core plate 20 is connected to the connecting angle steel 503 by bolts, and the left end of the conduit 301 is connected to the connecting pipe 506.

[0046] In this embodiment, a pad 60 is provided above the side of the energy-consuming core board 20 that is connected to the first connector 501. The pad 60 is connected to the energy-consuming core board 20 and the connecting angle steel 503 by bolts.

[0047] In this embodiment, a fixing nut 40 is provided between the disc spring device 302, the baffle 304 and the stop block 303.

[0048] The self-resetting buckling-restrained brace with a fully bolted connection proposed in this invention is assembled as follows:

[0049] Step 1: First, screw the two fixing nuts 40 to the middle of the conduit 301, and place a baffle 304 at each of the two fixing nuts 40. Then, pass the two sets of disc spring devices 302 through the conduit 301. Next, place a baffle 304 on the outside of each set of disc spring devices 302, and then screw in the fixing nuts 40 to fix the disc spring devices 302.

[0050] Step 2: Arrange two jacks symmetrically between the two sets of disc spring devices 302, and then pre-compress the two sets of disc spring devices 302. After the compression deformation of the two sets of disc spring devices 302 reaches the target value, tighten the two fixing nuts 40 in the middle of the guide tube 301. At this point, the pre-compression of the disc spring devices 302 is completed.

[0051] Step 3: Screw the left end of the conduit 301 into the connecting tube 506 that forms the first connector 501.

[0052] Step 4: Connect the stop block 303 to the first constraint member 102 with high-strength bolts, but do not tighten the bolts at this time. Then, respectively, insert the baffles 304 at both ends of each disc spring device 302 between the two stop blocks 303, so that the baffles 304 and the stop blocks 303 are in a tight fit, and then apply prestress to the high-strength bolts in the stop blocks 303.

[0053] Step 5: Adhere an unbonded material to the surface of the yield section of the energy-dissipating core plate 20. Then, symmetrically arrange two energy-dissipating core plates 20 on the outside of the two first constraint members 102, ensuring that the second energy-dissipating element 90 of the energy-dissipating core plate 20 is in contact with the second energy-dissipating element 90 of the first constraint member 102. Next, install the lateral constraint plates 101 on both sides of the energy-dissipating core plate 20, ensuring that the lateral constraint plates 101 are in contact with the second energy-dissipating element 90 of the first constraint member 102 and that their holes are aligned. Finally, install the two second constraint members 103, and tighten the high-strength bolts to form a single unit consisting of the four lateral constraint plates 101, the two first constraint members 102, and the two second constraint members 103.

[0054] Step 6: Connect the energy-consuming core plate 20 and the pad plate 60 to the connecting angle steel 503 using high-strength bolts.

[0055] Step 7: Insert the right end of the conduit 301 into the connecting pipe 506 that forms the second connector 502, and then connect the energy-dissipating core plate 20 and the second constraint member 103 to the connecting angle steel 503 with high-strength bolts. At this point, the support assembly is complete.

[0056] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A self-resetting buckling-restrained brace with an all-bolted connection, characterized in that, The device includes an external constraint and a reset device disposed within the external constraint. The reset device includes a conduit with disc spring devices sleeved at both ends. Several blocks are provided on opposite sides of the inner wall of the external constraint. Two disc spring devices are located between two blocks, and the ends of the two disc spring devices abut against the two blocks. The external constraint includes a first constraint group and a second constraint group. The first constraint group includes two oppositely arranged first constraint members, and the second constraint group includes two oppositely arranged second constraint members. The first constraint members and the second constraint members are connected to each other. Energy-dissipating core plates are respectively provided on opposite sides of the external constraint member. There is a gap between the energy-dissipating core plate and the external constraint member. The energy-dissipating core plate includes a first energy-dissipating component. The first energy-dissipating component includes a first yielding section and a first connecting section provided at both ends of the first yielding section. The cross-sectional area of ​​the first yielding section is smaller than the cross-sectional area of ​​the first connecting section. A first transition section with a gradually increasing cross-sectional area from the first yielding section to the first connecting section is provided between the first yielding section and the first connecting section. The energy-dissipating core plate further includes a second energy-dissipating component perpendicularly disposed to the first energy-dissipating component. The second energy-dissipating component includes a second yielding section and second connecting sections disposed at both ends of the second yielding section. The cross-sectional area of ​​the second yielding section is smaller than the cross-sectional area of ​​the second connecting sections. A second transition section with a gradually increasing cross-sectional area from the second yielding section to the second connecting sections is provided between the second yielding section and the second connecting sections. A lateral constraint plate is provided between the first constraint component and the second constraint component. The two lateral constraint plates have gaps with the first yielding section, and the thickness of the lateral constraint plates is not less than the thickness of the first energy-dissipating component. It includes a first connector and a second connector. One side of the first connector is connected to one end of the two energy-consuming core plates, and one side of the second connector is connected to the other end of the two energy-consuming core plates. One end of the conduit is fixedly connected to the first connector, and the other end of the conduit is axially movable to adapt to the guide hole of the second connector. The first connector and the second connector are provided with two connecting parts on one side. Each connecting part includes four connecting angle steels. Each connecting angle steel includes a first connecting plate and a second connecting plate that are connected to each other. The first connecting plate and the second connecting plate are provided with connecting holes that are staggered to each other. The first energy-consuming component is locked to the first connecting plate, and the second energy-consuming component is locked to the second connecting plate. The first connector and the second connector are respectively provided with connecting tubes. The inner hole of the connecting tube in the first connector is a threaded hole, and the inner hole of the connecting tube in the second connector is a smooth hole. The left end of the conduit is connected to the connecting tube in the first connector by a thread, and the right end of the conduit is inserted into the connecting tube in the second connector.

2. The self-resetting buckling-restrained brace with all-bolted connection as described in claim 1, characterized in that, The first constraint member and the second constraint member are respectively provided with a first reinforcing plate and a second reinforcing plate along their length direction.

3. The self-resetting buckling-restrained brace with all-bolted connection as described in claim 1, characterized in that, The disc spring device includes a disc spring body, and the disc spring body has pressing parts at both ends that are threaded to the guide tube. The two pressing parts press the disc spring body so that the disc spring body has a pre-pressurization force, and the pressing parts abut against the stop block.

4. The self-resetting buckling-restrained brace with all-bolted connection as described in claim 1, characterized in that, The connecting part includes two opposite and spaced-apart connecting angle steels, and the gap between the second connecting plates is used to accommodate the second energy-consuming component.

Images