Buckling-restrained brace with SMA self-centering damper-friction energy dissipation device

Abstract

This invention provides a buckling-restrained brace with an SMA self-resetting damper and friction energy dissipation device, relating to the field of structural seismic equipment technology. It includes a steel tube outer sleeve, an SMA self-resetting damper, a friction energy dissipation mechanism, and a friction hinge. The SMA self-resetting damper includes a shape memory alloy energy dissipation rod, on which a group of disc springs is arranged. The shape memory alloy energy dissipation rod is movably connected within a circular sleeve. The friction energy dissipation mechanism includes a cross-shaped connecting plate, with a lower ear plate connected to the bottom of the cross-shaped connecting plate. The cross-shaped connecting plate is connected to an L-shaped connecting plate by a group of high-strength bolts. The friction energy dissipation mechanism and the SMA self-resetting damper are disposed inside the steel tube outer sleeve. This buckling-restrained brace is connected to the main structure via a friction hinge. The beneficial effects of this invention are: the SMA self-resetting damper allows the structure to reset after an earthquake, and the damper and friction mechanism dissipate seismic energy, forming multiple seismic defense lines and reducing damage to the main structure.

Description

Technical Field

[0001] This invention relates to the field of structural seismic equipment technology, and in particular to a buckling-resistant brace with an SMA self-resetting damper-friction energy dissipation device. Background Technology

[0002] Traditional seismic design approaches enhance the strength and stiffness of structures through effective seismic measures or prevent brittle failure or collapse by utilizing the ductility of structures or components. However, the energy consumption of such structural systems mainly depends on the main structure, and they are prone to plastic damage and residual deformation, making them difficult to repair.

[0003] How to solve the above-mentioned technical problems is the challenge facing this invention. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a buckling-resistant brace with an SMA self-resetting damper-friction energy dissipation device, which enables the structure to reset after an earthquake by using an SMA self-resetting damper and dissipates seismic energy using the damper and friction mechanism to form multiple seismic defenses and reduce damage to the main structure.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a buckling brace with an SMA self-resetting damper-friction energy dissipation device, including an outer steel tube outer sleeve, an inner SMA self-resetting damper, a friction energy dissipation mechanism and a friction hinge, wherein the friction hinge includes an upper ear plate and a lower ear plate. The SMA self-resetting damper includes a shape memory alloy energy dissipation rod, on which a disc spring group composed of several disc springs is provided. The shape memory alloy energy dissipation rod is movably connected inside a circular sleeve. The bottom of the SMA self-resetting damper is connected to the lower ear plate through a hinged support. The friction energy dissipation mechanism includes a cross-shaped connecting plate, the bottom of which is connected to the lower ear plate, and the cross-shaped connecting plate is connected to an L-shaped connecting plate by a group of high-strength bolts. The top of the L-shaped connecting plate is connected to the upper ear plate. The friction energy dissipation mechanism and the SMA self-resetting damper are installed inside the outer tube of the steel pipe, and the buckling-resistance brace is connected to the main component through the friction hinge.

[0006] The cross-shaped connecting plate has a first groove near the top, and the first groove is formed on the four surfaces of the cross-shaped connecting plate. Four L-shaped connecting plates are provided, which are respectively located between the vertical angles of two adjacent plates of the cross-shaped connecting plate. Each L-shaped connecting plate includes two vertical longitudinal plates, which are arranged parallel to the two adjacent plates of the cross-shaped connecting plate. A horizontal plate is provided at the bottom of the two longitudinal plates of each L-shaped connecting plate. The horizontal plate is perpendicularly connected to the longitudinal plates and fixedly connected to the two longitudinal plates. The L-shaped connecting plate has a second groove on each of its two longitudinal plates. The second groove corresponds to the first groove, and several high-strength bolts pass through the second groove and the first groove to bear axial tension / compression and dissipate energy through plastic deformation.

[0007] A plurality of longitudinally arranged friction plates are provided between the L-shaped connecting plate and the cross-shaped connecting plate. A plurality of circular through holes are provided on the friction plates. The circular through holes correspond to the second strip groove and the first strip groove and are penetrated by the high-strength bolt group.

[0008] The upper ear plate and the lower ear plate have the same structure, both including a fixing plate and an ear plate body, and the ear plate body is provided with a hinge hole; The top of the L-shaped connecting plate is fixedly connected to the fixing plate of the upper ear plate, and the fixing plate of the upper ear plate is fixedly connected to the top of the outer sleeve of the steel pipe. The outer steel tube is a rectangular tube with an opening at the top that matches the shape of the fixing plate of the upper ear plate. The outer steel tube acts as a constraint unit, wrapping the inner core unit and providing lateral constraint to prevent buckling of the inner core under pressure. The bottom end of the cross-shaped connecting plate is fixed to a fixing plate that is perpendicular to the lower ear plate; One SMA self-resetting damper is provided between adjacent plates near the lower end of the cross-shaped connecting plate, and four SMA self-resetting dampers are provided on the cross-shaped connecting plate accordingly.

[0009] The shape memory alloy energy dissipation rod is in the shape of a round rod, and the circular sleeve is a hollow round tube, which is coaxially and slidably connected to the shape memory alloy energy dissipation rod inside. The disc spring assembly is provided in at least two sets, and the shape memory alloy energy dissipation rod is provided with a plurality of disc spring baffles coaxial with the disc springs. The disc spring baffles are located at both ends of each disc spring assembly and their outer diameter matches the inner diameter of the circular sleeve.

[0010] The bottom end of the circular sleeve is fixedly provided with an ear plate end of a hinged support, and the support end of the hinged support is fixedly connected to the top surface of the fixing plate of the lower ear plate by bolts.

[0011] The top of the shape memory alloy energy-consuming rod passes through the circular sleeve and is axially engaged in the through hole of the horizontal plate of the L-shaped connecting plate.

[0012] This invention protects the main structure from severe damage by suppressing buckling instability of the support under compression, enabling it to dissipate seismic energy through plastic deformation under both tension and compression. This energy-dissipating support structure can reset after an earthquake and utilizes replaceable energy-dissipating devices to absorb seismic energy, reducing damage and residual deformation of the main structure. Shape memory metal SMA dampers and friction devices jointly dissipate seismic energy, and the SMA dampers also function as self-resetting devices, allowing the structure to reset and ensuring the main structure remains in an elastic state or undergoes slight plastic deformation, further reducing damage and residual deformation. After an earthquake, only the damaged SMA dampers and friction device components need to be replaced to restore the structure's usability, achieving replaceability after damage and meeting the seismic requirements for structural recoverability.

[0013] The beneficial effects of this invention are as follows: the SMA self-resetting damper enables the structure to reset after an earthquake, and the damper and friction energy dissipation mechanism dissipate earthquake energy, forming multiple seismic defense lines, reducing damage and residual deformation of the main structure. The friction energy dissipation mechanism acts as a "damage fuse", enabling replacement after damage. As an important technology in modern earthquake-resistant engineering, the buckling-resistance brace realizes the earthquake-resistant concept of "overcoming rigidity with flexibility" through scientific material and structural design, providing reliable protection for building safety. This support can be installed in frame structures, tube-frame structures, truss structures, and other fields. It is suitable for multi-story and high-rise buildings, long-span bridges, industrial plants, historical building reinforcement, and lifeline projects such as hospitals and data centers with high seismic performance requirements in high-intensity earthquake zones. Attached Figure Description Figure 1 This is a schematic diagram of the installation of the present invention.

[0014] Figure 2 This is a three-dimensional exploded structure diagram of the present invention.

[0015] Figure 3 This is a schematic diagram showing the connection between the friction hinge and the steel pipe outer sleeve of the present invention.

[0016] Figure 4 This is a three-dimensional exploded structural diagram of the friction energy dissipation mechanism of the present invention.

[0017] Figure 5 This is a schematic diagram of the installation of the SMA self-resetting damper of the present invention.

[0018] Figure 6 This is a three-dimensional structural diagram of the SMA self-resetting damper of the present invention.

[0019] Figure 7 This is a schematic diagram of the three-dimensional exploded structure of the SMA self-resetting damper of the present invention.

[0020] Figure 8This is an internal cross-sectional view of the SMA self-resetting damper of the present invention.

[0021] The attached figures are labeled as follows: 1. Steel pipe outer sleeve; 2. SMA self-resetting damper; 201. Shape memory alloy energy dissipation rod; 202. Disc spring assembly; 203. Circular sleeve; 204. Hinge support; 205. Disc spring baffle; 3. Friction energy dissipation mechanism; 301. Cross-shaped connecting plate; 302. High-strength bolt group; 303. L-shaped connecting plate; 304. First slot; 305. Second slot; 306. Friction plate; 307. Circular through hole; 4. Friction hinge; 401. Upper ear plate; 402. Lower ear plate; 5. Structural column; 501. Structural beam; 502. Connecting support; 503. Connecting ear plate. Detailed Implementation

[0022] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0023] See Figures 1 to 8 As shown, this embodiment is a buckling brace with an SMA self-resetting damper-friction energy dissipation device, including an outer steel tube sleeve 1, an inner SMA self-resetting damper 2, a friction energy dissipation mechanism 3 and a friction hinge 4, the friction hinge 4 including an upper ear plate 401 and a lower ear plate 402. The SMA self-resetting damper 2 includes a shape memory alloy energy dissipation rod 201, a disc spring group 202 composed of several disc springs is provided on the shape memory alloy energy dissipation rod 201, the shape memory alloy energy dissipation rod 201 is movably connected in a circular sleeve 203, and the bottom of the SMA self-resetting damper 2 is connected to a lower ear plate 402 through a hinged support 204. The friction energy dissipation mechanism 3 includes a cross-shaped connecting plate 301, a lower ear plate 402 connected to the bottom of the cross-shaped connecting plate 301, an L-shaped connecting plate 303 connected to the cross-shaped connecting plate 301 by a group of high-strength bolts 302, and an upper ear plate 401 connected to the top of the L-shaped connecting plate 303. The steel pipe outer sleeve 1 is equipped with a friction energy dissipation mechanism 3 and an SMA self-resetting damper 2. This buckling-resistance brace is connected to the main component through a friction hinge 4.

[0024] The cross-shaped connecting plate 301 has a first groove 304 near the top of the plate body, and the first groove 304 is opened on the four plate surfaces of the cross-shaped connecting plate 301; Four L-shaped connecting plates 303 are provided, which are respectively located between the vertical angles of two adjacent plates of the cross-shaped connecting plate 301. Each L-shaped connecting plate 303 includes two vertical longitudinal plates, which are respectively arranged parallel to the two adjacent plates of the cross-shaped connecting plate 301. A horizontal plate is provided at the bottom of the two longitudinal plates of each L-shaped connecting plate 303. The horizontal plate is perpendicularly connected to the longitudinal plates and fixedly connected to the two longitudinal plates. The L-shaped connecting plate 303 has a second groove 305 on both longitudinal plates. The second groove 305 is corresponding to the first groove 304, and several high-strength bolts pass through the second groove 305 and the first groove 304.

[0025] A number of longitudinally arranged friction plates 306 are provided between the L-shaped connecting plate 303 and the cross-shaped connecting plate 301. A number of circular through holes 307 are provided on the friction plates 306. The circular through holes 307 correspond to the second strip groove 305 and the first strip groove 304 and are penetrated by a group of high-strength bolts.

[0026] The upper ear plate 401 and the lower ear plate 402 have the same structure, both including a fixing plate and an ear plate body, and the ear plate body is provided with a hinge hole; The top of the L-shaped connecting plate 303 is fixedly connected to the fixing plate of the upper ear plate 401, and the fixing plate of the upper ear plate 401 is fixedly connected to the top of the steel pipe outer sleeve 1. The steel pipe outer sleeve 1 is a rectangular tube with an opening at the top that matches the shape of the fixing plate of the upper ear plate 401.

[0027] The bottom end of the cross-shaped connecting plate 301 is fixed and vertically connected to the fixing plate of the lower ear plate 402; An SMA self-resetting damper 2 is provided between adjacent plates near the lower end of the cross-shaped connecting plate 301, and four SMA self-resetting dampers 2 are provided on the cross-shaped connecting plate 301.

[0028] The shape memory alloy energy dissipation rod 201 is a round rod, and the circular sleeve 203 is a hollow round tube, which is coaxially and slidably connected to the shape memory alloy energy dissipation rod 201 inside. The disc spring assembly 202 is provided with at least two sets. The shape memory alloy energy dissipation rod 201 is provided with several disc spring baffles 205 coaxial with the disc spring. The disc spring baffles 205 are located at both ends of each disc spring assembly 202 and their outer diameter matches the inner diameter of the circular sleeve 203.

[0029] The bottom end of the circular sleeve 203 is fixedly provided with the ear plate end of the hinge support 204, and the support end of the hinge support 204 is fixedly connected to the top surface of the fixing plate of the lower ear plate 402 by bolts.

[0030] The top of the shape memory alloy energy dissipation rod 201 passes through the circular sleeve 203 and is axially snapped into the through hole of the horizontal plate of the L-shaped connecting plate 303.

[0031] The steel pipe outer sleeve 1 and friction hinge 4 are made of Q355B steel; the circular sleeve 203, disc spring baffle 205, and hinge support 204 are made of Q235B steel; the bolts are high-strength grade 10.9 bolts; and the cross-shaped connecting plate 301 and L-shaped connecting plate 303 are made of LYP160 low yield point steel. This device is installed on the main structure, such as... Figure 1As shown, the main structure includes a vertical structural column 5, a horizontal structural beam 501, and a connecting support 502 between the structural column 5 and the structural beam 501. The connecting support 502 is connected to the lower ear plate 402 of this device through a connecting ear plate 503.

[0032] The technical features of this invention not described can be implemented by or using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this invention, and this invention is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention should also be within the protection scope of this invention.

Claims

1. A buckling-resistance brace with an SMA self-resetting damper-friction energy dissipation device, characterized in that, It includes an outer steel pipe jacket (1), an inner SMA self-resetting damper (2), a friction energy dissipation mechanism (3) and a friction hinge (4), wherein the friction hinge (4) includes an upper ear plate (401) and a lower ear plate (402). The SMA self-resetting damper (2) includes a shape memory alloy energy dissipation rod (201), on which a disc spring group (202) composed of several disc springs is provided. The shape memory alloy energy dissipation rod (201) is movably connected to a circular sleeve (203). The bottom of the SMA self-resetting damper (2) is connected to the lower ear plate (402) through a hinged support (204). The friction energy dissipation mechanism (3) includes a cross-shaped connecting plate (301), the bottom of which is connected to the lower ear plate (402), the cross-shaped connecting plate (301) is connected to an L-shaped connecting plate (303) by a group of high-strength bolts (302), and the top of which is connected to the upper ear plate (401). The friction energy dissipation mechanism (3) and the SMA self-resetting damper (2) are installed inside the steel pipe outer sleeve (1). The buckling brace is connected to the main body component through the friction hinge (4). The cross-shaped connecting plate (301) has a first groove (304) near the top of the plate body, and the first groove (304) is opened on the four plate surfaces of the cross-shaped connecting plate (301). Four L-shaped connecting plates (303) are provided, respectively located between the vertical angles of two adjacent plates of the cross-shaped connecting plate (301). Each L-shaped connecting plate (303) includes two vertical longitudinal plates, which are arranged parallel to the two adjacent plates of the cross-shaped connecting plate (301). A horizontal plate is provided at the bottom of the two longitudinal plates of each L-shaped connecting plate (303), and the horizontal plate is perpendicularly connected to the longitudinal plates and fixedly connected to the two longitudinal plates. The L-shaped connecting plate (303) has a second groove (305) on both longitudinal plates. The second groove (305) is corresponding to the first groove (304), and a number of high-strength bolts pass through the second groove (305) and the first groove (304). A plurality of longitudinally arranged friction plates (306) are provided between the L-shaped connecting plate (303) and the cross-shaped connecting plate (301). A plurality of circular through holes (307) are provided on the friction plates (306). The circular through holes (307) correspond to the second groove (305) and the first groove (304) and are penetrated by the high-strength bolt group.

2. The buckling-resistant brace with SMA self-resetting damper-friction energy dissipation device according to claim 1, characterized in that, The upper ear plate (401) and the lower ear plate (402) have the same structure, both including a fixing plate and an ear plate body, and the ear plate body is provided with a hinge hole; The top end of the L-shaped connecting plate (303) is fixedly connected to the fixing plate of the upper ear plate (401), and the fixing plate of the upper ear plate (401) is fixedly connected to the top end of the steel pipe outer sleeve (1). The steel pipe outer sleeve (1) is a rectangular tube, and the top opening matches the shape of the fixing plate of the upper ear plate (401).

3. The buckling-resistant brace with SMA self-resetting damper-friction energy dissipation device according to claim 2, characterized in that, The bottom end of the cross-shaped connecting plate (301) is fixed to and vertically connected to the fixing plate of the lower ear plate (402); One SMA self-resetting damper (2) is provided between adjacent plates near the lower end of the cross-shaped connecting plate (301), and four SMA self-resetting dampers (2) are provided on the cross-shaped connecting plate (301).

4. The buckling-resistant brace with SMA self-resetting damper-friction energy dissipation device according to claim 3, characterized in that, The shape memory alloy energy dissipation rod (201) is a round rod, and the circular sleeve (203) is a hollow round tube, which is coaxially and slidably connected to the shape memory alloy energy dissipation rod (201) inside. The disc spring assembly (202) is provided with at least two sets, and the shape memory alloy energy dissipation rod (201) is provided with a plurality of disc spring baffles (205) coaxial with the disc spring. The disc spring baffles (205) are located at both ends of each disc spring assembly (202) and their outer diameter is matched with the inner diameter of the circular sleeve (203).

5. The buckling-resistant brace with SMA self-resetting damper-friction energy dissipation device according to claim 4, characterized in that, The bottom end of the circular sleeve (203) is fixedly provided with the ear plate end of the hinge support (204), and the support end of the hinge support (204) is fixedly connected to the top surface of the fixing plate of the lower ear plate (402) by bolts.

6. The buckling-resistant brace with SMA self-resetting damper-friction energy dissipation device according to claim 5, characterized in that, The top end of the shape memory alloy energy-consuming rod (201) passes through the circular sleeve (203) and is axially engaged in the through hole of the horizontal plate of the L-shaped connecting plate (303).

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