A support member based on fe-sma and damper containing the same

Abstract

The application discloses a support component based on Fe-SMA and a damper containing the component, and belongs to the technical field of dampers, which comprises a damper, end plates arranged at two ends of the damper, and a node assembly connected with the end plates, wherein the node assembly is connected with an anchoring assembly used for being pre-buried in a concrete structure, and a core energy dissipation element of the damper is made of an iron-based shape memory alloy material; the node assembly comprises a first connecting part connected with the end plate, a second connecting part connected with the anchoring assembly, and a connecting mechanism connecting the first connecting part and the second connecting part; and the application achieves the technical effects that: through floating hinged nodes and spherical aligning nodes, through the sliding fit of an elliptical hole, a bushing and a pin shaft, or the rotating fit of a ball socket and a ball head (namely, an outer bushing and an inner ring), the nodes can transfer great damping force; the reliability and durability of the nodes are improved, and the problem that the nodes are prone to being damaged under a complex stress state is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dampers, in particular to a support component based on Fe-SMA and a damper containing the same. BACKGROUND

[0002] In modern building structures and bridge engineering, seismic and damping design is the core link to ensure the safety and function of the structure. Traditional seismic support components mostly use ordinary steel or hydraulic dampers to absorb seismic energy through plastic deformation or viscous energy dissipation. However, such components often have obvious limitations: ordinary steel supports produce permanent deformation after yielding, resulting in significant residual displacement of the structure, making post-earthquake repair difficult and costly. Hydraulic dampers have the risk of fluid leakage, are sensitive to environmental temperature, and require regular maintenance, with long-term reliability being a challenge. In addition, existing support nodes mostly use rigid connections, which require very high installation precision and are difficult to adapt to additional bending moments caused by construction errors or long-term structural deformation, easily leading to premature node damage or mismatch between actual damper stress state and design, affecting its energy dissipation efficiency. Especially under complex multi-dimensional seismic excitation, stress concentration in the node area is prominent, which easily causes fatigue damage, restricting the improvement of the overall structural durability and seismic toughness.

[0003] Therefore, the existing needs are not met, and for this purpose, we propose a support component based on Fe-SMA and a damper containing the same. SUMMARY

[0004] To this end, the present application provides a support component based on Fe-SMA to solve the above problems in the prior art.

[0005] To achieve the above purpose, the present application provides the following technical solutions:

[0006] According to the first aspect of the present application, a support component based on Fe-SMA includes a damper, end plates arranged at both ends of the damper, and a node assembly connected to the end plates, the node assembly being connected to an anchoring assembly for pre-buried in a concrete structure, the core energy dissipation element of the damper being made of iron-based shape memory alloy material; the node assembly includes a first connecting part connected to the end plate, a second connecting part connected to the anchoring assembly, and a connecting mechanism connecting the first connecting part and the second connecting part, the connecting mechanism being configured to allow the damper to have a small amount of adaptive displacement ability in at least one direction relative to the anchoring assembly; the anchoring assembly includes a buried frame and a plurality of buried rods, the buried rods being arranged on the buried frame and being able to be driven to extend outward relative to the buried frame by a driving mechanism.

[0007] Further, the connecting mechanism comprises an oblong hole arranged on the first connecting part, a bushing fixedly arranged in the oblong hole, and a pin shaft penetrating through the second connecting part and the bushing; the bushing is fixedly arranged in the oblong hole in an interference fit, the pin shaft is slidingly arranged in the inner hole of the bushing, the second connecting part is provided with a fastener for limiting the axial movement of the pin shaft, and the fastener is an end cap screwed on the threads at the two ends of the pin shaft, and the end cap abuts against the outer surface of the second connecting part.

[0008] Further, the second connecting part is a U-shaped ear plate, and the first connecting part is a connecting plate.

[0009] Further, the oblong hole is an elliptical hole, the long axis of which is larger than the outer diameter of the bushing, and the short axis of which is smaller than the outer diameter of the bushing.

[0010] Further, the outer peripheral surface of the bushing is a regular polygonal surface, and the diameter of the circumscribed circle of the regular polygonal surface is larger than the short axis of the oblong hole.

[0011] Further, the bushing comprises an outer bushing fixedly arranged in the oblong hole and an inner ring arranged in the outer bushing, the inner surface of the outer bushing is a spherical inner cavity, the outer surface of the inner ring is a spherical outer convex surface matched with the spherical inner cavity, and a sliding hole is arranged on the inner ring.

[0012] Further, the driving mechanism comprises a bidirectional screw rod rotatably arranged on the embedded frame, two moving blocks threadedly connected to the bidirectional screw rod, and a plurality of connecting rod mechanisms connected between the moving blocks and the embedded rods; the rotation of the bidirectional screw rod can drive the two moving blocks to move towards or away from each other, and then drive all the embedded rods to move radially synchronously through the connecting rod mechanisms.

[0013] Further, the embedded frame comprises a main frame, a horizontal plate connected to the upper and lower sides of the main frame, and a side frame connected to the left and right sides of the main frame, and the horizontal plate and the side frame are both provided with guide holes for the embedded rods to pass through.

[0014] Further, the connecting rod mechanism comprises hinge rods one and two respectively connected to the upper and lower sides of the moving block, and hinge rods three and four respectively connected to the left and right sides of the moving block, the other ends of the hinge rods one and two are respectively connected to moving plates for pushing the upper and lower embedded rods, and the other ends of the hinge rods three and four are respectively connected to moving frames for pushing the left and right embedded rods.

[0015] The present application has the following advantages:

[0016] 1. The Fe-SMA-based support member, which provides an Fe-SMA-based support member that significantly improves the comprehensive performance of the seismic support system through the organic combination of material innovation and structural design. First, the core energy dissipation element uses Fe-SMA, which utilizes its unique super-elastic effect and high damping characteristics to dissipate energy through large phase change deformation under seismic action, and can restore to its original state through thermal excitation or spontaneous recovery after the earthquake, greatly reducing structural residual displacement, achieving self-resetting and recoverability of the support function, and effectively overcoming the defect of cumulative plastic deformation of traditional supports after the earthquake, making it possible to quickly restore the structure to its original function.

[0017] 2. The Fe-SMA-based support member, through the floating hinge node and spherical centering node, through the sliding fit of the elliptical hole, bushing and pin shaft, or the rotating fit of the ball socket and ball head (i.e. outer bushing, inner ring), the node can adaptively absorb the installation error during construction and the small displacement caused by temperature changes and foundation settlement during use, completely eliminating the additional bending moment generated by non-axial force, ensuring that the damper is always in the optimal axial stress state, greatly improving the reliability and durability of the node, and solving the problem of node damage under complex stress state.

[0018] 3. The Fe-SMA-based support member, the embedded part uses a three-dimensional anchoring system that can be mechanically expanded, which drives multiple groups of embedded rods to extend synchronously through a rotating bidirectional screw, achieving precise positioning and pre-tightening before pouring, effectively preventing the deviation during concrete pouring, and the expanded embedded rod and concrete form a strong three-dimensional mechanical interlocking, evenly spreading the concentrated force to the deep part of the concrete, greatly improving the pullout and shear bearing capacity, avoiding the local crushing or splitting damage of concrete caused by traditional straight rod embedded parts, and ensuring the long-term stability and integrity of the anchoring system. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The present application provides a front view of a Fe-SMA-based support member;

[0020] Figure 2 The front view of Example 2;

[0021] Figure 3 The exploded view of Figure 2 ;

[0022] Figure 4 The exploded view of the bushing;

[0023] Figure 5 The cross-sectional view of the bushing;

[0024] Figure 6 The front view of the hexagonal bushing;

[0025] Figure 7 Figure 1 is a perspective view of the damper; Figure 3

[0026] Figure 8 Figure 2 is a front view of the embedded bracket;

[0027] Figure 9 Figure 3 is a side view of the damper; Figure 8

[0028] Figure 10 Figure 4 is a front view of the bracket;

[0029] Figure 11 Figure 5 is a front view of the articulated rod.

[0030] In the figure: 1, damper; 101, end plate; 2, connecting plate; 3, ear plate; U-shaped ear plate;

[0031] 301, fixed plate; 4, embedded part; 401, embedded bracket; 402, embedded rod; 403, cross plate; 404, U-shaped side frame; 405, bracket; 406, guide hole; 407, moving bracket one; 408, moving bracket two; 409, moving plate one; 410, moving plate two; 411, bidirectional threaded rod; 412, fixed frame; 413, moving block; 414, articulated rod one; 415, articulated rod two; 416, articulated rod three; 417, articulated rod four; 5, bolt hole; 6, pin shaft; 7, bushing; 701, outer bushing; 702, ball inner cavity; 703, inner ring; 704, ball outer convex surface; 705, annular sealing plate; 8, sliding hole; 9, oval hole; 10, end cap one; 11, end cap two. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described in detail with specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0033] Example 1:

[0034] Referring to Figure 1 - Figure 11 A support member based on Fe-SMA, comprising a damper 1; the damper is a energy dissipation damper made of Fe-SMA material, and the core energy dissipation element (such as the core plate) is made of Fe-SMA material;

[0035] ​​The end plate 101 is fixedly connected at both ends of the damper 1, and the outer side of the end plate 101 is provided with an ear plate 3, the side close to the end plate 101 of the ear plate 3 is fixedly connected with a connecting plate 2, the connecting plate 2 and the end plate 101 are both provided with bolt holes 5, the other side of the ear plate 3 is fixedly installed with a fixed plate 301, the fixed plate 301 is fixedly connected with a buried part 4 away from the ear plate 3, and the buried part 4 comprises a buried frame 401, and the top end, the bottom end and the two sides of the buried frame 401 are all provided with buried rods 402;

[0036] In use: the buried part 4 is pre-buried in the concrete structure, the buried rods 402 are fully anchored with the concrete, then the damper 1 is firmly connected with the ear plate 3 by passing high-strength bolts through the bolt holes 5 on the end plate 101 and the connecting plate 2, and a complete force transmission path is formed;

[0037] Working principle: the damper 1 is connected with the connecting plate 2 on the ear plate 3 through the end plate 101 by bolts, and a detachable rigid joint is formed; when the structure is deformed, the load is transmitted to the buried part 4 through the ear plate 3, the buried rods 402 diffuse it into the concrete, and the energy transmission and dissipation are realized; the high ductility and super-elasticity of the Fe-SMA material provide the core recovery and energy dissipation capacity.

[0038] Embodiment two:

[0039] The same as embodiment one, except that the connecting mode of the connecting plate 2 is different, the connecting plate 2 is fixedly connected with the end plate 101, but is fixedly connected perpendicularly with the end plate 101; further, referring to Figure 2 - Figure 11 A support member based on Fe-SMA, an oval hole 9 is formed on the connecting plate 2, and a cylindrical bushing 7 with an outer diameter slightly larger than the short axis of the oval hole 9 is pressed into the hole by a press; a sliding hole 8 is formed in the middle of the bushing 7; the ear plate 3 is a U-shaped structure, a connecting hole 12 is formed on the ear plate 3, and a pin shaft 6 is slidingly connected in the connecting hole 12; the outer wall of the pin shaft 6 is slidingly connected with the inner wall of the sliding hole 8, the two ends of the pin shaft 6 are provided with external threads, and the pin shaft 6 is threadedly connected with end cap one 10 and end cap two 11 after penetrating through the connecting holes 12 on the two sides of the U-shaped ear plate 3; the distance between the inner walls of the two sides of the U-shaped ear plate 3 is greater than the thickness of the connecting plate 2, and a gap is left between the two to ensure the floating function; the gap allows the connecting plate 2 at the end of the damper 1 to move slightly in the plane perpendicular to the axis during installation and under stress;

[0040] Pin shaft 6 as the main force element, through the end cap one 10, end cap two 11 limit its ear plate 3, therefore, pin shaft 6 and ear plate 3 in the axial direction is locked;The core function of oval hole 9 includes: one, the short axis size is slightly smaller than the outer diameter of bushing 7, through the interference fit to lock the bushing firmly in the connecting plate 2;Second, the long axis size is greater than the outer diameter of bushing 7, to provide a small amount of movement space perpendicular to the axis direction for the damper unit;Bushing 7 outer wall and oval hole 9 interference fit fixed, the inner wall and pin shaft 6 sliding fit, together form "damper 1-bushing 7" and "ear plate 3-pin shaft 6" two interface, realize rigid connection to flexible hinge upgrade;

[0041] Specifically:

[0042] Pin shaft 6 plays a core force element, all damping force is ultimately transmitted through it;

[0043] The main function of oval hole 9 is to accommodate and fix the bushing 7, the short axis size of the oval hole determines the pre-pressing amount of the bushing 7;The core function of the hole is not directly matched with the pin shaft, but provides a structural basis for realizing "floating hinge";

[0044] Provide interference fit basis: its short axis size is slightly smaller than the outer diameter of bushing 7, so that the bushing 7 can be forced into and firmly locked in the connecting plate 2, become the part of the damper end;

[0045] Provide floating freedom: its long axis size is greater than the outer diameter of bushing 7, to provide a small amount of, powerless movement space for the entire damper unit (through the bushing 7) in the direction perpendicular to its axis;

[0046] The core role of bushing 7: its outer wall is fixed by interference fit with oval hole 9, and its inner wall (slide hole 8) forms sliding fit with pin shaft 6;This design creates "damper 1-bushing 7" and "ear plate 3-pin shaft 6" two interfaces, upgrades the traditional rigid connection to flexible hinge;

[0047] Linkage effect: when the earthquake causes the structure to deform, the moving ear plate 3 will push the bushing 7 through the pin shaft 6, at this time, the only way of movement is: the bushing 7 with the connecting plate 2 of the damper 1 slides along the outer wall of the fixed pin shaft 6;

[0048] In use: the pin shaft 6 is sequentially inserted through the one side ear plate connecting hole 12, the slide hole 8 of the bushing 7, the other side ear plate connecting hole 12, and then the end cap one 10 and the end cap two 11 are tightened at both ends of the pin shaft 6, forming a hinged connection;During installation, the connecting plate 2 is allowed to drive the damper 1 to fine-tune the position along the long axis direction of the oval hole, realizing self-adaptive centering;

[0049] Working principle: This design forms a floating hinge joint; pin 6 acts as the main force transmission element, transmitting damping force from damper 1 to ear plate 3; the cooperation of oval hole 9 and bushing 7 allows a small amount of floating displacement of connecting plate 2 (and damper 1) in the direction perpendicular to pin 6.

[0050] Example three:

[0051] Basically the same as example two, except that the bushing 7 is hexagonal, and the multiple edges of the hexagonal outer wall and the oval hole 9 form a mechanical interlock after being pressed together, providing a torsional resistance far exceeding that of a cylindrical bushing 7, completely eliminating the risk of micro-rotation of the bushing 7 in the hole under long-term reciprocating load; the six corners of the hexagon become natural stress guide points, which can more evenly spread the concentrated force from the pin 6 to the base material of the connecting plate 2, significantly optimizing the stress distribution at the hole edge and further improving the fatigue resistance; linkage effect: the stability of the hexagonal bushing 7 benefits the entire joint; it ensures that the orientation of the "slide hole 8" remains unchanged throughout the service life, thereby ensuring that the sliding track of the pin 6 is always consistent, making the stress pattern of the damper 1 more stable and predictable.

[0052] Example four:

[0053] Basically the same as example two; further more: referring to Figure 4 - Figure 6 a support member based on Fe-SMA, the bushing 7 comprises an outer bushing 701, the inner side of the outer bushing 701 is provided with a spherical inner cavity 702; the inner side of the outer bushing 701 is provided with an inner ring 703, the outer side of the inner ring 703 is provided with a spherical outer convex surface 704, and the inner ring 703 is provided with a slide hole 8;

[0054] In use: the above device integrates two kinds of kinematic pairs;

[0055] Spherical pair: composed of the spherical inner cavity 702 of the outer bushing 701 and the spherical outer convex surface 704 of the inner ring 703; this structure allows the inner ring 703 to swing in any direction by a certain angle (such as ±10°);

[0056] Sliding pair: composed of the slide hole 8 of the inner ring 703 and the pin 6, allowing axial sliding;

[0057] Linkage effect: this design separates the "aligning" and "sliding" functions and assigns them to different structures; when there are multi-directional overturning moments or torsion, the spherical pair acts, the inner ring 703 adapts and deflects, causing the connecting head (connecting plate 2) of the damper 1 to deflect, thereby completely eliminating the bending moment caused by non-axial force; at the same time, the sliding pair still works; the action of the pin 6 remains unchanged, and it is still the final force transmission hub;

[0058] The outer bushing 701 is pressed into the oval hole 9 of the connecting plate 2, and the outer convex surface 704 of the inner ring 703 is pressed into the inner concave cavity 702, to assemble a complete spherical bearing bushing; the connection mode with the pin shaft 6 is the same as that of embodiment two; when the connection angle changes due to an earthquake, the inner ring 703 can be self-adaptively deflected in the outer bushing 701;

[0059] Working principle: this embodiment integrates the function of a spherical joint bearing; when the seismic load has an inclination angle, the spherical pair can automatically align, so that the connecting head of the damper 1 is self-adaptively deflected, and always maintains the best axial stress state, completely solves the adverse effects of multi-directional bending moment and torque, and significantly improves the reliability and durability of the joint under complex stress.

[0060] Embodiment five:

[0061] Basically the same as embodiment one; further, referring to Figure 7 Figure 11 A support member based on Fe-SMA, the embedded frame 401 includes a support 405, the top end and the bottom end of the support 405 are fixedly connected with a horizontal plate 403, and the two sides of the support 405 are fixedly connected with a U-shaped side frame 404; the support 405 is fixedly connected with the fixed plate 301.

[0062] Working principle: the embedded frame 401 forms a solid internal space truss structure; the horizontal plate 403 and the U-shaped side frame 404 greatly increase the contact area and mechanical engagement surface with the concrete, upgrade the traditional “point anchoring” to “body anchoring”, effectively disperse the huge damping force more evenly into the large volume of concrete, greatly enhance the uplift resistance and shear capacity, and avoid local crushing or splitting damage of the concrete.

[0063] Embodiment six:

[0064] Basically the same as embodiment five; further, referring to Figure 7 Figure 11 A support member based on Fe-SMA, guide holes 406 are formed in the horizontal plate 403 and the U-shaped side frame 404, and the inner walls of the guide holes 406 are in sliding connection with the outer wall of the embedded rod 402.

[0065] The inner walls of the embedded frame 401 are respectively provided with a moving frame one 407 and a moving frame two 408, and the inner wall top end and the inner wall bottom end of the embedded frame 401 are respectively provided with a moving plate one 409 and a moving plate two 410, the outer sides of the two groups of moving plates and the two groups of moving frames are fixedly connected with the embedded rod 402, and the outer sides of the moving frame one 407 and the moving frame two 408 and the outer sides of the moving plate one 409 and the moving plate two 410 are fixedly connected with the embedded rod 402.

[0066] ​​The middle part of the support 405 is fixedly connected with a fixed frame 412; the middle part of the fixed frame 412 is rotationally connected with a bidirectional threaded screw rod 411, and the two sides of the bidirectional threaded screw rod 411 are respectively threadedly connected with moving blocks 413;

[0067] The top part of the two moving blocks 413 is rotationally connected with a hinged rod one 414, the bottom part is rotationally connected with a hinged rod two 415, one side is rotationally connected with a hinged rod three 416, and the other side is rotationally connected with a hinged rod four 417; the top end of the hinged rod one 414 is rotationally connected with the bottom part of the moving plate one 409, the bottom end of the hinged rod two 415 is rotationally connected with the top end of the moving plate two 410, the outer side of the hinged rod three 416 is rotationally connected with the moving frame two 408, and the outer side of the hinged rod four 417 is rotationally connected with the moving frame one 407; the end part of the bidirectional threaded screw rod 411 is fixedly connected with an inner hex end cap;

[0068] In use: after the embedded part 4 is placed in the pre-embedded steel reinforcement cage and preliminarily positioned, a hexagonal wrench is inserted into the inner hex end cap and rotates the bidirectional threaded screw rod 411 to drive the two moving blocks 413 to move towards each other along the bidirectional threaded screw rod 411; the moving blocks 413 push the moving plate one 409 and the moving plate two 410 through the hinged rod one 414 and the hinged rod two 415 at the top and bottom respectively, and push the moving frame one 407 and the moving frame two 408 through the hinged rod three 416 and the hinged rod four 417 at the sides respectively, so as to move outward, thereby driving all the embedded rods 402 to move outward along the guide holes 406, so that the end part is tightly pushed against the formwork or the excavated pit wall, to realize precise positioning and pre-tightening; then concrete pouring is carried out; this can precisely position and pre-tighten the embedded part before pouring concrete, effectively preventing displacement during pouring; after pouring is completed, the embedded rod 402 forms a strong mechanical interlocking with the concrete, and the anchoring effect far exceeds that of ordinary straight rods; the linkage mechanism ensures that all the embedded rods are expanded synchronously and uniformly, provides extremely stable initial fixation, and finally forms a high-performance anchoring system integrated with the concrete.

Claims

1. A Fe-SMA based support member, characterized by, The damper includes end plates arranged at both ends of the damper and a node assembly connected with the end plates, the node assembly is connected with an anchoring assembly for being embedded in a concrete structure, a core energy dissipation element of the damper is made of a ferrous-based shape memory alloy material; the node assembly includes a first connecting part connected with the end plate, a second connecting part connected with the anchoring assembly, and a connecting mechanism connecting the first connecting part and the second connecting part, the connecting mechanism is configured to allow the damper to have a small amount of self-adaptive displacement ability in at least one direction relative to the anchoring assembly; the anchoring assembly includes a buried frame and a plurality of buried rods, the buried rods are movably arranged on the buried frame and can be driven to extend outward relative to the buried frame by a driving mechanism; The connecting mechanism includes an oblong hole arranged on the first connecting part, a bushing fixedly installed in the oblong hole, and a pin shaft penetrating the second connecting part and the bushing; the bushing is fixedly fitted with the oblong hole in an interference fit, the pin shaft is slidingly fitted with the inner hole of the bushing, the second connecting part is provided with a fastener for limiting the axial movement of the pin shaft, the fastener is an end cap screwed on the threads at both ends of the pin shaft, and the end cap abuts against the outer surface of the second connecting part; The oblong hole is an elliptical hole, the long axis size of the oblong hole is greater than the outer diameter of the bushing, and the short axis size of the oblong hole is less than the outer diameter of the bushing; The bushing includes an outer bushing fixedly arranged in the oblong hole and an inner ring swingably arranged in the outer bushing, the inner surface of the outer bushing is a spherical inner cavity, the outer surface of the inner ring is a spherical outer convex surface matched with the spherical inner cavity, and the inner ring is provided with the sliding hole.

2. A Fe-SMA based support member according to claim 1, characterized in that, The second connecting part is a U-shaped ear plate, and the first connecting part is a connecting plate.

3. A Fe-SMA based support member according to claim 1, characterized in that, The outer peripheral surface of the bushing is a regular polygonal prism surface, and the diameter of the circumscribed circle of the outer peripheral surface is greater than the short axis size of the oblong hole.

4. The Fe-SMA based support member according to claim 1, wherein The driving mechanism includes a bidirectional screw rod rotatably arranged on the buried frame, two moving blocks threadedly connected with the bidirectional screw rod, and a plurality of linkage mechanisms connected between the moving blocks and the buried rods; rotation of the bidirectional screw rod can drive the two moving blocks to move towards or away from each other, and then drive all the buried rods to move radially synchronously through the linkage mechanisms.

5. A Fe-SMA based support member according to claim 4, characterized in that The buried frame includes a main frame, horizontal plates connected to the upper and lower sides of the main frame, and side frames connected to the left and right sides of the main frame, and the horizontal plates and the side frames are both provided with guide holes for the buried rods to pass through.

6. A Fe-SMA based support member according to claim 5, characterized in that The linkage mechanisms include hinge rods one and two respectively hinged to the upper and lower sides of the moving blocks, and hinge rods three and four respectively hinged to the left and right sides of the moving blocks, the other ends of the hinge rods one and two are respectively hinged to moving plates for pushing the upper and lower buried rods, and the other ends of the hinge rods three and four are respectively hinged to moving racks for pushing the left and right buried rods.

7. A damper comprising a Fe-SMA support member, characterized in that A support member based on Fe-SMA according to any one of claims 1-6.

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