Novel self-resetting buckling restrained brace device
By using the sliding connection between the inner and outer sleeves and the design of SMA stranded wire, the buckling restraint brace was made self-resetting, solving the problem of irreversible deformation under large loads and enhancing the device's recovery ability and seismic performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-03-17
AI Technical Summary
Existing buckling restraint braces have insufficient self-resetting ability under large loads, and the plastic deformation is irreversible, which affects their recovery ability.
The inner sleeve and outer sleeve are slidably connected and connected by a movable rod and SMA stranded wire. The inner sleeve moves in the outer sleeve, and the tensile properties of the SMA stranded wire are used to reset the inner sleeve, thereby driving the yielding core segment to reset.
It improves the self-resetting capability of buckling-restrained braces under seismic loading, ensuring that the braces can return to their original state after being subjected to stress, thus enhancing the seismic performance of the structure.
Smart Images
Figure CN224002148U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of buckling restraint support technology, specifically a novel self-resetting buckling restraint support device. Background Technology
[0002] Buckling-restrained braces (BRBs), a type of seismic-resistant device, are widely used in seismic design of buildings. The core principle of BRBs is to dissipate energy by restraining buckling behavior. During an earthquake, a structure is subjected to the impact of seismic waves, resulting in deformation and stress. BRBs, through special restraint devices, limit the buckling behavior of the support members, preventing buckling instability under stress and instead absorbing seismic energy in a stable energy-dissipating manner. Their structure typically consists of a cross-shaped core material fitted with a sleeve, with mortar or concrete filling the space between the core material and the sleeve. The yielding section of the core material is coated with an unbonded layer to isolate it from the bonding of the mortar or concrete.
[0003] The core component of a buckling-restrained brace is the yield section, which is typically made of low-yield-point steel. When the brace is subjected to axial force, the yield section yields at a specific force value, meaning the material enters the plastic deformation stage, and energy is dissipated as heat.
[0004] Once the supported yield section yields, the material enters the plastic deformation stage. During plastic deformation, the internal microstructure of the material changes, and this change requires external energy input.
[0005] Although buckling-restrained braces have a certain self-resetting ability, they can partially return to their original state when the load is small.
[0006] However, plastic deformation under large loads is irreversible. Therefore, how to improve the self-resetting ability of buckling-restrained braces is the problem to be solved in this application. Summary of the Invention
[0007] To address this technical deficiency in the prior art and improve the self-resetting capability of buckling restraint braces, this utility model provides a novel self-resetting buckling restraint brace device, comprising a core material and a sleeve. The sleeve includes an outer sleeve and an inner sleeve, each with two spaced-apart strip-shaped limiting holes. Movable rods are movably installed in the strip-shaped limiting holes, and the two movable rods are connected by SMA stranded wire. The core material is connected to the sleeve through a connector.
[0008] Preferably, the core material is a plurality of strip-shaped plate-shaped steel materials, the core material including a connecting section, a transition section and a yielding core section; the width of the yielding core section is smaller than that of the connecting section, and the transition section is a sloping section extending from the connecting section to the yielding core section.
[0009] Preferably, the yielding core segment is wrapped with a steel pipe.
[0010] Preferably, the connector includes two vertical plates and a first horizontal plate and a second horizontal plate connecting the vertical plates.
[0011] Preferably, both the first and second horizontal plates have strip-shaped notches, which are engaged with the transition section.
[0012] Preferably, corresponding bolt holes are provided on the sleeve and the vertical plate.
[0013] In summary, the beneficial effects of this utility model include providing a novel self-resetting buckling restraint support device, in which the inner sleeve is movably connected within the outer sleeve, and the inner sleeve is reset relative to the outer sleeve via a movable rod and SMA stranded wire, thereby driving the reset of the yielding core segment. Attached Figure Description
[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0015] Figure 1 This is a schematic diagram of the structure in an embodiment of the present utility model;
[0016] Figure 2 This is a schematic diagram of the sleeve structure in an embodiment of the present utility model;
[0017] Figure 3 This is an exploded view of the sleeve structure in an embodiment of the present utility model;
[0018] Figure 4 This is a schematic diagram of the core material in an embodiment of the present utility model;
[0019] Figure 5 This is a schematic diagram of the core material structure in an embodiment of the present utility model;
[0020] Figure 6 This is a schematic diagram of the core material structure in an embodiment of the present utility model;
[0021] Figure 7 This is a schematic diagram of the state in an embodiment of the present utility model;
[0022] In the diagram, 1 is the core material, 2 is the sleeve, 3 is the movable rod, 4 is the SMA stranded wire, and 5 is the connector.
[0023] Connecting section 11, transition section 12, yield core section 13, steel pipe 14;
[0024] Outer sleeve 21, inner sleeve 22, strip-shaped limiting hole 23;
[0025] Vertical plate 51, first horizontal plate 52, second horizontal plate 53, strip notch 54;
[0026] Bolt hole 501. Detailed Implementation
[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] Example 1: Refer to Figure 1-7 As shown, the present invention provides a novel self-resetting buckling restraint support device, comprising a core material 1 and a sleeve 2. The sleeve 2 includes an outer sleeve 21 and an inner sleeve 22, with the inner sleeve 22 slidably connected in the outer sleeve 21.
[0031] Both the outer sleeve 21 and the inner sleeve 22 are provided with two spaced-apart strip-shaped limiting holes 23. A movable rod 3 is movably installed in the strip-shaped limiting holes 23. The movable rod 3 passes through the strip-shaped limiting holes 23 on the outer sleeve 21 and the inner sleeve 22. The two ends of the movable rod 3 are riveted into rivet caps. The strip-shaped limiting holes 23 slide in the strip-shaped limiting holes 23. The interaction between the strip-shaped limiting holes 23 and the movable rod 3 limits the sliding connection of the inner sleeve 22 in the outer sleeve 21.
[0032] The two movable rods 3 are connected by SMA stranded wires 4. When subjected to earthquake action, tension or compression causes misalignment between the inner sleeve 22 and the outer sleeve 22, thereby driving the movable rods and putting the SMA stranded wires in a stretched state. After the earthquake, the movable rods 3 can be reset by the action of the SMA stranded wires 4, so that the outer sleeve 21 and the inner sleeve 22 return to their original state, thus restoring the buckling restraint support device to its original unstressed state.
[0033] The core material 1 is connected to the sleeve 2 via a connector 5, and the movable rod 3 is located between the spaced core materials 1.
[0034] Example 2: Refer to Figure 4-6 As shown, the core material 1 provided by this utility model is a plurality of strip-shaped plate-shaped steel materials. The core material 1 includes a connecting section 11, a transition section 12 and a yielding core section 13. The width of the yielding core section 13 is smaller than that of the connecting section 11, and the transition section 12 is a sloping section extending from the connecting section 11 to the yielding core section 13.
[0035] The yielding core section 13 is wrapped with a steel pipe 14. The yielding core section 13 and the steel pipe 14 are not completely fitted together, but a gap is left to prevent load transfer between the steel pipe and the yielding core section.
[0036] The connector 5 includes two vertical plates 51 and a first horizontal plate 52 and a second horizontal plate 53 connecting the vertical plates 51.
[0037] Both the first horizontal plate 52 and the second horizontal plate 53 have strip-shaped notches 54, which are engaged with the transition section 12.
[0038] Corresponding bolt holes 501 are made on the sleeve 2 and the vertical plate 51.
[0039] The strip notch 54 is snapped onto the transition section 12 of the inclined side. When the connector 5 is inserted into the sleeve 2 and fixed by bolts through the corresponding bolt holes 501, it serves to limit the core material 1 and prevent the core material 1 from sliding out of the sleeve 2.
[0040] It should be noted that the widths of the vertical plate 51 of the connector 5 and the first horizontal plate 52 and the second horizontal plate 53 connecting the vertical plate 51 are adapted to the diameter of the sleeve 2, that is, the width of the connecting outer sleeve 21 is greater than the width of the inner sleeve 22. In other words, the connectors 5 located at both ends of the core material 1 have different dimensions.
[0041] When the support is subjected to pressure transmitted from the frame nodes, the pressure is transmitted to the inner sleeve 22 through the connecting section 11 of the energy-dissipating component. This causes the inner sleeve 22 to move to the left inside the outer sleeve 21. Simultaneously, the left strip-shaped limiting hole 23 on the inner sleeve 22 pulls the left movable rod 3 to the left, while the outer sleeve 21 remains stationary. During this process, the SMA stranded wire 4 is gradually stretched. When the support is subjected to tension transmitted from the frame nodes, the inner sleeve 22 moves to the right outside the outer sleeve 21 due to the tension. This causes the right strip-shaped limiting hole 23 on the inner sleeve 22 to move the right movable rod 3 to the right. At this time, the position of the outer sleeve remains unchanged, and the SMA stranded wire 4 is under tension due to the movement of the inner sleeve 22. Figure 7 As can be seen from the three working states shown, regardless of whether it is subjected to tension or compression, the SMA stranded wire 4 is in a tensile state. This characteristic allows the SMA stranded wire 4 to maximize its deformation recovery performance when the support is in any state.
[0042] In summary, the beneficial effects of this utility model include providing a novel self-resetting buckling restraint support device, in which the inner sleeve is movably connected within the outer sleeve, and the inner sleeve is reset relative to the outer sleeve via a movable rod and SMA stranded wire, thereby driving the reset of the yielding core segment.
[0043] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.
[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A new self-centering buckling restrained brace device comprising a core material (1), a sleeve (2), characterized in that, The sleeve (2) comprises an outer sleeve (21) and an inner sleeve (22), both of which are provided with two spaced apart strip-shaped limiting holes (23), and a movable rod (3) is movably installed in the strip-shaped limiting hole (23), and the two movable rods (3) are connected through an SMA wire (4), and the core material (1) is connected with the sleeve (2) through a connecting piece (5).
2. A new self-centering buckling-restrained brace device according to claim 1, characterized by, The core material (1) is a plurality of strip-shaped plate-shaped steel materials, and the core material (1) comprises a connecting section (11), a transition section (12) and a yield core section (13); the width of the yield core section (13) is smaller than that of the connecting section (11), and the transition section (12) is a bevel section from the connecting section (11) to the yield core section (13).
3. A new self-centering buckling-restrained brace device according to claim 2, characterized by, The yield core section (13) is wrapped with a steel pipe (14).
4. A new self-centering buckling-restrained brace device according to claim 2, characterized by, The connecting piece (5) comprises two vertical plates (51) and first and second horizontal plates (52 and 53) connecting the vertical plates (51).
5. A new self-centering buckling-restrained brace device according to claim 4, characterized by, The first and second horizontal plates (52 and 53) are both provided with a strip-shaped notch (54), and the strip-shaped notch (54) is clamped on the transition section (12).
6. A new self-centering buckling-restrained brace device according to claim 5, characterized by, Corresponding bolt holes (501) are formed in the sleeve (2) and the vertical plate (51).