Buckling-restrained brace with SMA self-resetting damper-friction energy consumption device

Abstract

The invention provides a buckling-restrained brace with an SMA self-resetting damper-friction energy dissipation device, and relates to the technical field of structural anti-seismic equipment, the buckling-restrained brace comprises a steel pipe outer sleeve, an SMA self-resetting damper, a friction energy dissipation mechanism and a friction hinge, the SMA self-resetting damper comprises a shape memory alloy energy dissipation rod, and the shape memory alloy energy dissipation rod is connected with the SMA self-resetting damper. A disc spring set composed of a plurality of disc springs is arranged on the shape memory alloy energy dissipation rod, the shape memory alloy energy dissipation rod is movably connected into the circular sleeve, the friction energy dissipation mechanism comprises a cross-shaped connecting plate, the bottom of the cross-shaped connecting plate is connected with a lower lug plate, and the cross-shaped connecting plate is connected with an L-shaped connecting plate through a high-strength bolt group. A friction energy dissipation mechanism and an SMA self-resetting damper are arranged in the steel pipe outer sleeve. The buckling-restrained brace is connected with a main body component through a friction hinge. The anti-seismic structure has the beneficial effects that the structure can be reset through the SMA self-resetting damper after an earthquake, earthquake energy is dissipated through the damper and the friction mechanism, multiple anti-seismic defense lines are formed, and damage to the main body structure is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of structural earthquake-resistant equipment, and in particular to an anti-buckling brace with an SMA self-resetting damper-friction energy dissipation device. Background Art

[0002] The traditional seismic design approach is to enhance the strength and stiffness of the structure through effective seismic measures or to avoid brittle failure or collapse of the structure through the ductility of the structure or components. However, the energy consumption of this structural system mainly depends on the main structure, which is prone to plastic damage and residual deformation and is difficult to repair.

[0003] How to solve the above technical problems is the subject faced by the present invention. Summary of the Invention

[0004] In order to address the deficiencies of the prior art, the present invention provides an anti-buckling support with an SMA self-resetting damper-friction energy dissipation device, which enables the structure to reset after an earthquake through an SMA self-resetting damper, and utilizes the damper and friction mechanism to dissipate seismic energy, forming multiple seismic defense lines and reducing damage to the main structure.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows: the present invention provides an anti-buckling support with an SMA self-resetting damper-friction energy dissipation device, comprising an external steel pipe outer sleeve, an internal SMA self-resetting damper, a friction energy dissipation mechanism and a friction hinge, wherein the friction hinge comprises an upper ear plate and a lower ear plate; The SMA self-resetting damper includes a shape memory alloy energy-absorbing rod, on which a disc spring group consisting of a plurality of disc springs is provided. The shape memory alloy energy-absorbing rod is movably connected in a circular sleeve, and the bottom of the SMA self-resetting damper is connected to the lower ear plate via a hinged support. The friction energy dissipation mechanism includes a cross-shaped connecting plate, the bottom of the cross-shaped connecting plate is connected to the lower ear plate, the cross-shaped connecting plate is connected to an L-shaped connecting plate through a group of high-strength bolts, and 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 arranged inside the outer sleeve of the steel pipe, and the anti-buckling support is connected to the main component through the friction hinge.

[0006] The cross-shaped connecting plate is provided with a first strip groove on the plate body near the top, and the first strip groove is opened on the four plate surfaces of the cross-shaped connecting plate; There are four L-shaped connecting plates, each of which is arranged between the vertical corners of two adjacent plates of the cross-shaped connecting plate. The L-shaped connecting plate includes two vertical longitudinal plates, which are respectively 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, and the horizontal plate is vertically connected to the longitudinal plates and fixedly connects the two longitudinal plates. A second strip groove is provided on both longitudinal plates of the L-shaped connecting plate. The second strip groove is arranged corresponding to the first strip groove, and a number of high-strength bolts pass through the second strip groove and the first strip groove, which are responsible for bearing axial tension / compression and consuming 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 opened 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 has the same structure as the lower ear plate, and both include a fixing plate and an ear plate body, wherein the ear plate body is provided with a hinge hole; The top end 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 end of the outer sleeve of the steel pipe; The outer sleeve of the steel pipe is a rectangular pipe, and the top opening matches the shape of the fixing plate of the upper ear plate. The outer steel pipe serves as a constraint unit, wrapping the core unit to provide lateral constraints to prevent the core from buckling when under pressure; The bottom end of the cross-shaped connecting plate is fixed and vertically connected to the fixing plate of 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 correspondingly provided on the cross-shaped connecting plate.

[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 slidably connected to the shape memory alloy energy dissipation rod; There are at least two disc spring groups, and a plurality of disc spring baffles coaxial with the disc springs are provided on the shape memory alloy energy-absorbing rod. The disc spring baffles are located at both ends of each disc spring group and the outer diameters thereof match the inner diameters of the circular sleeves.

[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 fixed plate of the lower ear plate by bolts.

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

[0012] The present invention suppresses the buckling instability of the support when under compression, so that it can dissipate seismic energy through plastic deformation when under tension and compression, thereby protecting the main structure from serious damage. The energy-absorbing support structure can be reset after the earthquake, and uses a replaceable energy-absorbing device to absorb seismic energy, reducing damage and residual deformation of the main structure. The shape memory metal SMA damper and the friction device jointly dissipate seismic energy, and the shape memory metal SMA damper plays a self-resetting role to reset the structure, ensuring that the main body of the structure is in an elastic state or slightly plastically deformed, reducing damage and residual deformation of the main structure. After the earthquake, only the locally damaged elements of the SMA damper and the friction device need to be replaced to restore the structure to its usable function, achieving replaceability after damage and meeting the seismic resistance requirements of structural recoverability.

[0013] The beneficial effects of the present 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 are used to dissipate earthquake energy, forming multiple seismic defense lines, reducing damage and residual deformation of the main structure. The friction energy dissipation mechanism plays the role of a "damage fuse" and can be replaced after damage. As an important technology in modern seismic engineering, the buckling-resisting brace realizes the seismic concept of "using softness to overcome hardness" through scientific material and structural design, providing reliable protection for building safety. This support can be installed in frame structures, frame-tube structures, truss structures and other fields. It is suitable for multi-story buildings, long-span bridges, industrial plants, historical building reinforcement in high-intensity earthquake zones, hospitals with high seismic performance requirements, data centers and other lifeline projects. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 It is an installation diagram of the present invention.

[0014] Figure 2 It is a schematic diagram of the three-dimensional explosion structure of the present invention.

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

[0016] Figure 4 It is a schematic diagram of the three-dimensional explosion structure 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 It is a schematic diagram of the three-dimensional structure of the SMA self-resetting damper of the present invention.

[0019] Figure 7 This is a schematic diagram of the three-dimensional explosion 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] Among them, the accompanying drawings are marked as: 1. Steel pipe outer sleeve; 2. SMA self-resetting damper; 201. Shape memory alloy energy dissipation rod; 202. Disc spring group; 203. Circular sleeve; 204. Articulated 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 groove; 305. Second groove; 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 DESCRIPTION

[0022] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0023] See also Figures 1 to 8 As shown, this embodiment is a buckling restraint brace with an SMA self-resetting damper-friction energy dissipation device, comprising an external steel pipe outer sleeve 1, an internal SMA self-resetting damper 2, a friction energy dissipation mechanism 3 and a friction hinge 4, wherein the friction hinge 4 comprises 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 assembly 202 consisting of a plurality of 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 a lower ear plate 402 via a hinged support 204. The friction energy dissipation mechanism 3 includes a cross-shaped connecting plate 301, the bottom of the cross-shaped connecting plate 301 is connected to the lower ear plate 402, the cross-shaped connecting plate 301 is connected to the L-shaped connecting plate 303 through a high-strength bolt group 302, and the top of the L-shaped connecting plate 303 is connected to the upper ear plate 401; A friction energy dissipation mechanism 3 and an SMA self-resetting damper 2 are arranged inside the outer sleeve 1 of the steel pipe. The anti-buckling support is connected to the main component through a friction hinge 4.

[0024] The cross-shaped connecting plate 301 is provided with a first strip groove 304 near the top of the plate body. The first strip groove 304 is opened on the four plate surfaces of the cross-shaped connecting plate 301. Four L-shaped connecting plates 303 are provided, each disposed between the vertical corners of two adjacent plates of the cross-shaped connecting plate 301. The L-shaped connecting plate 303 includes two vertical longitudinal plates, each of which is 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 vertically connected to the longitudinal plates and fixedly connects the two longitudinal plates. A second groove 305 is formed on both longitudinal plates of the L-shaped connecting plate 303 . The second groove 305 is corresponding to the first groove 304 , and a plurality of high-strength bolts penetrate between the second groove 305 and the first groove 304 .

[0025] A plurality of longitudinally arranged friction plates 306 are provided between the L-shaped connecting plate 303 and the cross-shaped connecting plate 301. The friction plates 306 are provided with a plurality of circular through holes 307. 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 comprising 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 outer sleeve 1 of the steel pipe; The outer sleeve 1 of the steel pipe is a rectangular tube, and the top opening 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 correspondingly provided on the cross-shaped connecting plate 301 .

[0028] The shape memory alloy energy dissipation rod 201 is in the shape of a round rod, and the circular sleeve 203 is a hollow round tube, which is coaxially slidably connected to the shape memory alloy energy dissipation rod 201; There are at least two disc spring groups 202 , and a plurality of disc spring baffles 205 coaxial with the disc springs are provided on the shape memory alloy energy dissipation rod 201 . The disc spring baffles 205 are located at both ends of each disc spring group 202 and their outer diameters match 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 hinged support 204, and the support end of the hinged support 204 is fixedly connected to the top surface of the fixed plate of the lower ear plate 402 by bolts.

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

[0031] The outer sleeve 1 of the steel pipe and the friction hinge 4 are made of Q355B steel, the circular sleeve 203, the disc spring baffle 205 and the hinged support 204 are made of Q235B steel, the bolts are high-strength bolts of grade 10.9, the cross-shaped connecting plate 301 and the 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 the device through a connecting ear plate 503.

[0032] Technical features not described in the present invention can be achieved through or by adopting existing technologies and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A buckling-resistance brace with an SMA self-resetting damper-friction energy dissipation device, characterized in that: It comprises an external steel pipe outer sleeve (1), an internal SMA self-resetting damper (2), a friction energy dissipation mechanism (3) and a friction hinge (4), wherein the friction hinge (4) comprises an upper ear plate (401) and a lower ear plate (402); The SMA self-resetting damper (2) comprises a shape memory alloy energy dissipation rod (201), a disc spring group (202) consisting of a plurality of disc springs is provided on the shape memory alloy energy dissipation rod (201), the shape memory alloy energy dissipation rod (201) is movably connected to a circular sleeve (203), and the bottom of the SMA self-resetting damper (2) is connected to the lower ear plate (402) via a hinged support (204); The friction energy dissipation mechanism (3) comprises a cross-shaped connecting plate (301), the bottom of the cross-shaped connecting plate (301) is connected to the lower ear plate (402), the cross-shaped connecting plate (301) is connected to an L-shaped connecting plate (303) via a high-strength bolt group (302), and the top of the L-shaped connecting plate (303) is connected to the upper ear plate (401); The friction energy dissipation mechanism (3) and the SMA self-resetting damper (2) are arranged inside the steel pipe outer sleeve (1), and the anti-buckling support is connected to the main component via the friction hinge (4).

2. The buckling-restrained brace with SMA self-resetting damper-friction energy dissipation device according to claim 1, characterized in that: The cross-shaped connecting plate (301) is provided with a first strip-shaped groove (304) on the plate body close to the top, and the first strip-shaped groove (304) is opened on the four plate surfaces of the cross-shaped connecting plate (301); Four L-shaped connecting plates (303) are provided, and are respectively provided between the vertical corners of two adjacent plates of the cross-shaped connecting plate (301). The L-shaped connecting plate (303) includes two vertical longitudinal plates, and the two longitudinal plates are respectively provided in parallel with 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 vertically connected to the longitudinal plates and fixedly connects the two longitudinal plates. The two longitudinal plates of the L-shaped connecting plate (303) are both provided with a second strip-shaped groove (305), the second strip-shaped groove (305) is arranged corresponding to the first strip-shaped groove (304), and a plurality of high-strength bolts pass through the second strip-shaped groove (305) and the first strip-shaped groove (304).

3. The buckling-restrained brace with SMA self-resetting damper-friction energy dissipation device according to claim 2, characterized in that: A plurality of longitudinally arranged friction plates (306) are provided between the L-shaped connecting plate (303) and the cross-shaped connecting plate (301), and a plurality of circular through holes (307) are provided on the friction plates (306). The circular through holes (307) correspond to the second strip-shaped grooves (305) and the first strip-shaped grooves (304) and are penetrated by the high-strength bolt group.

4. The buckling-restrained brace with SMA self-resetting damper-friction energy dissipation device according to claim 3, characterized in that: The upper ear plate (401) and the lower ear plate (402) have the same structure, both comprising a fixing plate and an ear plate body, wherein 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 outer sleeve (1) of the steel pipe; The outer sleeve (1) of the steel pipe is a rectangular tube, and the top opening matches the shape of the fixing plate of the upper ear plate (401).

5. The buckling-restrained brace with SMA self-resetting damper-friction energy dissipation device according to claim 4, characterized in that: 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); 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 correspondingly provided on the cross-shaped connecting plate (301).

6. The buckling-restrained brace with SMA self-resetting damper-friction energy dissipation device according to claim 5, characterized in that: The shape memory alloy energy dissipation rod (201) is in the shape of a round rod, and the circular sleeve (203) is a hollow circular tube, which is coaxially slidably connected to the shape memory alloy energy dissipation rod (201) inside. The disc spring group (202) is provided with at least two groups, and the shape memory alloy energy dissipation rod (201) is provided with a plurality of disc spring baffles (205) coaxial with the disc springs. The disc spring baffles (205) are located at both ends of each disc spring group (202) and have an outer diameter that matches the inner diameter of the circular sleeve (203).

7. The buckling-restrained brace with SMA self-resetting damper-friction energy dissipation device according to claim 6, characterized in that: The bottom end of the circular sleeve (203) is fixedly provided with an ear plate end of a hinged support (204), and the support end of the hinged support (204) is fixedly connected to the top surface of the fixed plate of the lower ear plate (402) by bolts.

8. The buckling-restrained brace with SMA self-resetting damper-friction energy dissipation device according to claim 7, characterized in that: The top end of the shape memory alloy energy dissipation rod (201) passes through the circular sleeve (203) and is axially clamped in the through hole of the horizontal plate of the L-shaped connecting plate (303).

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