阅读说明：本技术 一种配置自复位连杆的阻尼套筒及耗能减震方法 (Damping sleeve configured with self-resetting connecting rod and energy dissipation and shock absorption method ) 是由 柯珂 陈永辉 周绪红 陈凌阳 王宇航 于 2021-10-15 设计创作，主要内容包括：本发明提供了一种配置自复位连杆的阻尼套筒及耗能减震方法。所述阻尼套筒包括外筒、限位单元、以及自外而内依次连接并设置在外筒内的摩擦单元、自复位连杆单元和内筒；其中,限位单元包括M个第一限位板和N个第二限位板；摩擦单元包括M个与第一限位板一一对应的第一摩擦组件和N个与第二限位板一一对应的第二摩擦组件；自复位连杆单元包括M个与第一摩擦组件一一对应的第一屈曲约束棒和N个与第二摩擦组件一一对应的第二屈曲约束棒,第一、第二屈曲约束棒还与内筒铰接。所述方法包括采用上述的阻尼套筒来进行耗能减震工作。本发明的阻尼套筒采用多阶段耗能,克服了单一耗能的缺陷,耗能减震效果好；本发明阻尼套筒可在现场直接组装,使用便捷。(The invention provides a damping sleeve with a self-resetting connecting rod and an energy-consuming and shock-absorbing method. The damping sleeve comprises an outer cylinder, a limiting unit, a friction unit, a self-resetting connecting rod unit and an inner cylinder, wherein the friction unit, the self-resetting connecting rod unit and the inner cylinder are sequentially connected from outside to inside and are arranged in the outer cylinder; the limiting unit comprises M first limiting plates and N second limiting plates; the friction unit comprises M first friction components in one-to-one correspondence with the first limiting plates and N second friction components in one-to-one correspondence with the second limiting plates; the self-resetting connecting rod unit comprises M first buckling restraining rods and N second buckling restraining rods, wherein the M first buckling restraining rods correspond to the first friction assemblies one by one, the N second buckling restraining rods correspond to the second friction assemblies one by one, and the first buckling restraining rods and the second buckling restraining rods are hinged with the inner barrel. The method comprises the step of performing energy dissipation and shock absorption work by using the damping sleeve. The damping sleeve disclosed by the invention consumes energy in multiple stages, so that the defect of single energy consumption is overcome, and the energy consumption and shock absorption effects are good; the damping sleeve can be directly assembled on site, and is convenient and fast to use.)

1. A damping sleeve configured with a self-resetting connecting rod is characterized by comprising an outer cylinder, a limiting unit, a friction unit, the self-resetting connecting rod unit and an inner cylinder which are sequentially arranged in the outer cylinder from outside to inside, wherein,

the limiting unit comprises M first limiting plates and N second limiting plates, the first limiting plates and the second limiting plates are transversely arranged and fixedly connected with the inner surface of the outer barrel, the first limiting plates are positioned above the second limiting plates, and M and N are integers and are not less than 2;

the friction unit comprises M first friction components and N second friction components; the first friction assemblies and the first limiting plates can correspond to each other one by one, and each first friction assembly is located above the corresponding first limiting plate; the second friction assemblies and the second limiting plates can correspond one to one, and each second friction assembly is located below the corresponding second limiting plate; the first friction component and the second friction component comprise an outer friction piece and an inner friction piece which are tightly attached, and the outer friction piece is fixed on the inner wall of the outer barrel;

the self-resetting connecting rod unit comprises M first buckling restrained rods and N second buckling restrained rods; the first buckling constraint rods and the first friction assemblies can correspond to each other one by one, one end of each first buckling constraint rod is rotatably connected with the inner friction piece corresponding to the first friction assembly, and the other end of each first buckling constraint rod is hinged with the inner cylinder; the second buckling constraint rods and the second friction assemblies can correspond one to one, one end of each second buckling constraint rod is rotatably connected with the inner friction piece of the corresponding second friction assembly, and the other end of each second buckling constraint rod is hinged with the inner cylinder;

at least one type of first and second buckling restraint rods includes: the shape memory stick, a plurality of rubber sleeves and a plurality of metal sleeves are sleeved on the body of the shape memory stick; wherein, the innermost is a rubber sleeve, and the outermost is a metal sleeve.

2. The damping sleeve configured from a reset link of claim 1 wherein the outer and inner barrels are coaxial.

3. The damping sleeve configured from a reset link according to claim 1, wherein the first limit plates are all located on the same plane and the second limit plates are all located on the same plane.

4. The damping sleeve configured with a self-resetting connecting rod according to claim 1, wherein M is 3-8, and N is 3-8.

5. The damping sleeve configured from a reset link according to claim 1, wherein the end of the first retainer plate facing the inner cylinder has an upward projection configuration and the end of the second retainer plate facing the inner cylinder has a downward projection configuration.

6. The damping sleeve configured from a reset link according to claim 1 wherein the outer friction member and the inner friction member are both wedge friction members.

7. The damping sleeve configured with the self-resetting connecting rod as claimed in claim 1, wherein the number of the metal sleeves and the number of the rubber sleeves are equal to or greater than 2, and the metal sleeves and the rubber sleeves are sequentially sleeved on the shape memory rod in an alternating manner.

8. The damping sleeve configured from a reset link according to claim 1, wherein one end of the shape memory rod is a spherical end, and a side of the inner friction member facing the inner cylinder has a receiving groove for receiving the spherical end.

9. The damping sleeve configured with a self-resetting linkage according to claim 1, wherein the shape memory rod is made of a shape memory alloy.

10. A method of dissipating energy and damping vibrations, comprising performing the operation of dissipating energy and damping vibrations using the damping sleeve configured as a self-resetting connecting rod according to any one of claims 1 to 9.

Technical Field

The invention relates to the field of structural engineering, in particular to a damping sleeve with a self-resetting connecting rod and an energy dissipation and shock absorption method.

Background

In recent two and thirty years, people make great efforts to improve the anti-vibration capability of buildings, and a remarkable result of 'structural protection system' is obtained. Related researchers have jumped the concept of enhancing the anti-vibration capability of beams, columns and the like, and have proposed various protection systems to avoid or reduce the damage of earthquake and wind power by combining the dynamic performance of the structure. Energy dissipation systems, base isolation, energy absorption of dampers, active control of shock absorption systems and the like are applied to engineering practice. Some of them even become one of the indispensable protective measures for reducing vibration structurally. In particular, for three-dimensional vibrations where the failure mechanism is not well understood, which is an unpredictable earthquake, the protection systems for these structures are increasingly important.

The structures are protected by dampers with minimum controversy. The energy absorption and shock absorption by using the damper is not a new technology, and the damper is already applied to the industries of guns, automobiles, aerospace and the like to absorb vibration and dissipate energy. After the seventies of the twentieth century, related researchers began to gradually transfer these technologies to structures, which developed very rapidly.

Damping sleeve have damping fluid to damp, spring damping, damping of high damping material and friction damping etc. more mature damping principle at present, but the damping sleeve of single principle all has its own defect, such as the sealing performance of the hydraulic damping sleeve requires high, the damping fluid is apt to leak; the aging problem of high damping materials, like rubber materials, is easy to age; frictional losses of the friction damper, and the like.

SMA is a novel intelligent material and has the characteristics of superelasticity, high-damping shape memory effect performance and the like, but SMA is singly used as a damping material, so that the damping effect is limited and is limited by the factor of SMA.

Disclosure of Invention

In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, it is an object of the present invention to overcome the disadvantages of single principle damping sleeves.

To achieve the above object, an aspect of the present invention provides a damping sleeve configured with a self-resetting link.

The damping sleeve can comprise an outer cylinder, a limiting unit, a friction unit, a self-resetting connecting rod unit and an inner cylinder, wherein the friction unit, the self-resetting connecting rod unit and the inner cylinder are sequentially arranged in the outer cylinder from outside to inside; the limiting unit comprises M first limiting plates and N second limiting plates, the first limiting plates and the second limiting plates are transversely arranged and fixedly connected with the inner surface of the outer barrel, the first limiting plates are positioned above the second limiting plates, and M and N are integers and are not less than 2; the friction unit comprises M first friction components and N second friction components; the first friction assemblies and the first limiting plates can correspond to each other one by one, and each first friction assembly is located above the corresponding first limiting plate; the second friction assemblies and the second limiting plates can correspond one to one, and each second friction assembly is located below the corresponding second limiting plate; the first friction component and the second friction component comprise an outer friction piece and an inner friction piece which are tightly attached, and the outer friction piece is fixed on the inner wall of the outer barrel; the self-resetting connecting rod unit comprises M first buckling restrained rods and N second buckling restrained rods; the first buckling constraint rods and the first friction assemblies can correspond to each other one by one, one end of each first buckling constraint rod is rotatably connected with the inner friction piece corresponding to the first friction assembly, and the other end of each first buckling constraint rod is hinged with the inner cylinder; the second buckling constraint rods and the second friction assemblies can correspond one to one, one end of each second buckling constraint rod is rotatably connected with the inner friction piece of the corresponding second friction assembly, and the other end of each second buckling constraint rod is hinged with the inner cylinder; at least one class of the first and second buckling restraint rods comprises: the shape memory stick, a plurality of rubber sleeves and a plurality of metal sleeves are sleeved on the body of the shape memory stick; wherein, the innermost is a rubber sleeve, and the outermost is a metal sleeve.

Further, the outer and inner barrels may be coaxial.

Further, the first limiting plates can be located on the same plane, and the second limiting plates can be located on the same plane.

Further, the M is 3-8, for example, 4, 5, 6, etc.; the number N is 3 to 8, for example, 4, 5, 6, and the like.

Further, an end of the first stopper plate facing the inner cylinder may have an upward protrusion structure, and an end of the second stopper plate facing the inner cylinder may have a downward protrusion structure.

Further, along the direction from bottom to top, the distance between the outer friction piece of the first friction assembly and the inner wall of the outer barrel is gradually increased towards one surface of the inner friction piece; the distance between the inner friction piece and the inner wall of the outer cylinder is gradually increased towards one surface of the outer friction piece.

Further, along the direction from bottom to top, the distance between the outer friction piece of second friction pack towards the one side of interior friction piece and urceolus inner wall reduces gradually, and the radial dimension that interior friction piece increases gradually towards the distance between the one side of outer friction piece and the urceolus inner wall reduces gradually.

Further, both the outer friction member and the inner friction member may be wedge-shaped friction members.

Further, under the condition that the number of the rubber sleeves is larger than or equal to 2, the number of the metal sleeves and the number of the rubber sleeves are the same, and the metal sleeves and the rubber sleeves are sequentially and alternately sleeved.

Further, one end of the shape memory stick may be a spherical end, and a side of the inner friction member facing the inner cylinder has a receiving groove for receiving the spherical end.

Further, the shape memory rod may be made of shape memory alloy, that is, SMA rod.

The invention provides an energy-consuming and shock-absorbing method.

The method comprises the step of performing energy dissipation and shock absorption work by using the damping sleeve configured with the self-resetting connecting rod.

Compared with the prior art, the beneficial effects of the invention can include at least one item:

(1) the damping sleeve is simple and convenient in structure and low in manufacturing cost.

(2) Each part contained in the damping sleeve can be a prefabricated part, so that the damping sleeve is beneficial to mass production; the damping sleeve can be directly assembled on site, and is simple in assembly mode and convenient and fast to use.

(3) The damping sleeve disclosed by the invention adopts multi-stage energy consumption, overcomes the defect of single energy consumption, and has good energy consumption and shock absorption effects.

(4) The SMA rod is wrapped by the rubber and the steel pipe, so that the compression resistance of the SMA rod and the energy consumption capability of the structure are improved.

Drawings

The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

FIG. 1 shows a schematic longitudinal cross-sectional view of a damping sleeve of the present invention deployed from a reset link;

FIG. 2 shows a schematic top view of the damping sleeve of the present invention configured with a self-resetting linkage;

FIG. 3 shows a schematic view of the damping sleeve of the present invention configured with a self-resetting linkage;

FIG. 4 shows a schematic front view of the damping sleeve of the present invention configured with a self-resetting linkage;

FIG. 5 shows a schematic view of the outer barrel of the present invention;

FIG. 6 shows a schematic view of the inner barrel of the present invention;

figure 7 shows a schematic view of a second limiting plate of the invention;

FIG. 8 is a schematic view of the outer friction member, the inner friction member and the close fit therebetween of the present invention;

FIG. 9 shows a schematic view of a second buckling restraint bar of the present invention;

FIG. 10 shows a schematic of the connection of a second buckling restraint bar of the present invention to a second friction assembly;

fig. 11 shows a schematic view of the joining of parts of the invention.

Description of the main reference numerals:

1-outer cylinder;

2-a limiting unit, 21-a first limiting plate, 22-a second limiting plate and 22 a-a convex structure;

3-friction unit, 31-first friction component, 32-second friction component, A-inner friction component, B-outer friction component and C-containing groove;

4-self-resetting connecting rod unit, 41-first buckling restraining rod, 42-second buckling restraining rod, 421-SMA rod, 422-rubber sleeve, 423-metal sleeve;

5-inner cylinder, 51-first hinge joint element, 52-second hinge joint element.

Detailed Description

Hereinafter, the damping sleeve and the dissipative vibration damping method configured with the self-resetting connecting rod of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.

It should be noted that "first," "second," and the like are merely for convenience of description and for ease of distinction, and are not to be construed as indicating or implying relative importance. "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and "outer" are merely for convenience of description and to constitute relative orientations or positional relationships, and do not indicate or imply that the referenced components must have that particular orientation or position.

Exemplary embodiment 1

The present exemplary embodiment provides a damping sleeve configured with a self-resetting link.

As shown in fig. 1 and 2, the damping sleeve may include: the device comprises an outer cylinder 1, and a limiting unit 2, a friction unit 3, a self-resetting connecting rod unit 4 and an inner cylinder 5 which are sequentially arranged in the outer cylinder 1 from outside to inside.

As shown in fig. 2 and 3, the inner cylinder 5 may be located at the center of the outer cylinder 1. As shown in fig. 3, 5 and 6, both the outer cylinder 1 and the inner cylinder 5 may be cylinders, but the present invention is not limited thereto, and the shapes of both may be changed according to actual conditions, and may be square cylinders, for example.

The limiting unit 2 includes a plurality of first limiting plates 21 and a plurality of second limiting plates 22. Both the first stopper plate 21 and the second stopper plate 22 may be fixed laterally to the inner surface of the outer cylinder 1. The first stopper plate 21 may be located above the second stopper plate 22. The number of the first limiting plate 21 and the second limiting plate 22 may be the same or different, for example, both may be 3, or one may be 3 and the other may be 4, which may be determined according to actual situations.

The friction unit 3 includes a plurality of first friction members 31 and a plurality of second friction members 32. The number of the first friction assemblies 31 is the same as that of the first limiting plates 21, and the first friction assemblies 31 correspond to the first limiting plates 21 one by one, and each first friction assembly 31 is located above the corresponding first limiting plate 21. The number of the second friction assemblies 32 is the same as that of the second limit plates 22, and the second friction assemblies 32 are in one-to-one correspondence, and each second friction assembly 32 is located below the corresponding second limit plate 22. Both the first friction member 31 and the second friction member 32 may comprise an outer friction member B and an inner friction member a as shown in fig. 8, which are closely fitted, and the outer friction member B is fixed on the inner wall of the outer tube 1.

The self-resetting link unit 4 includes a plurality of first buckling restraining rods 41 and a plurality of second buckling restraining rods 42. The first buckling restraining rods 41 are the same in number as the first friction assemblies 31 and correspond to the first friction assemblies 31 one by one, one end of each first buckling restraining rod 41 is rotatably connected with the inner friction member a corresponding to the first friction assembly 31, and the other end of each first buckling restraining rod is hinged to the inner cylinder 5. The number of the second buckling restrained rods 42 is the same as that of the second friction assemblies 32, the second buckling restrained rods correspond to the second friction assemblies 32 one by one, one end of each second buckling restrained rod 42 is rotatably connected with the inner friction member a of the second friction assembly 32 correspondingly, and the other end of each second buckling restrained rod is hinged with the inner cylinder 5.

Again, the above "upper" and "lower" do not indicate or imply that the referenced components must have that particular orientation or position. For example, when the damping sleeve shown in fig. 1 is rotated 90 degrees to the left, the first stopper plate 21 is located to the left of the corresponding second stopper plate 22, and the first friction element 31 is located to the left of the corresponding second friction element 32.

In the present embodiment, as shown in fig. 4, the central axis of the outer cylinder 1 and the central axis of the inner cylinder 5 may be collinear. The height of the outer cylinder 1 is smaller than that of the inner cylinder 5, and as shown in fig. 4, both ends of the inner cylinder 5 can be exposed from the outer cylinder 1.

In this embodiment, both the outer cylinder and the inner cylinder may be metal pipes, such as steel pipes; of course, the present invention is not limited thereto, and the material of the outer cylinder and the inner cylinder may be other materials having sufficient strength.

In the present embodiment, as shown in fig. 1, all the first stopper plates 21 are located on the same plane. All the second limiting plates 22 can also be positioned on the same plane.

In this embodiment, as shown in fig. 7, one end (the end facing the inner cylinder) of the second stopper plate 22 has a downward projection 22a, and the projection 22a can restrict the second friction member from moving inward, that is, radially inward along the outer cylinder.

Similarly, the end of the first limit plate facing the inner cylinder is provided with an upward convex structure, and the convex structure can limit the inward movement of the first friction component, namely the inward movement along the radial direction of the outer cylinder.

In this embodiment, both the first limit plate and the second limit plate may be circular arc-shaped inner ring plates, and both the first limit plate and the second limit plate may be fixedly connected with the outer cylinder by welding, but the invention is not limited thereto, and may also be fixedly connected by other manners. Further, the first and second limiting plates may be identical, i.e., the shape and material are identical.

In the present embodiment, the outer friction member and the inner friction member are both wedge-shaped friction members, but the present invention is not limited thereto, and the shape of the friction members may be adjusted according to actual conditions. The outer friction element can be fixed to the inner wall of the outer cylinder, for example by welding.

In this embodiment, fig. 8 shows a schematic diagram of the outer friction member, the inner friction member and the close fit therebetween of the second friction assembly of the present invention. The drawing (a) is a schematic drawing showing the outer friction member B and the inner friction member A being attached to each other, (B) is a schematic drawing showing the outer friction member B in side view, (c) is a schematic drawing showing the inner friction member A, and (d) is a schematic drawing showing the inner friction member A in front view.

Be provided with an holding tank C on the internal friction spare A, holding tank C can hold the one end of bucking restraint stick to with the one end looks adaptation that holds the bucking restraint stick. Holding tank C still can play spacing effect to the one end of bucking restraint stick, and holding tank C can prevent that the one end of bucking restraint stick from following the roll-off promptly.

In this embodiment, the first and second buckling restraint rods may be identical, except for the arrangement of the two.

FIG. 9 shows a schematic view of a second buckling restraining bar of the present invention, wherein (a) is a schematic view of the second buckling restraining bar in its entirety, (b) is a schematic view of a second buckling restraining bar in its exploded view, and (c) is a schematic view of an SMA bar.

Second buckling restraint bar 42 may include: the SMA rod 421, and 2 rubber sleeves 422 and 2 metal sleeves 423 which are sequentially and alternately wrapped on the body 421b of the SMA rod 421. Further, the metal sheath 423 may be a steel pipe.

One end of SMA stick 421 may be a ball end 421 a. And the spherical end 421a has a radial dimension greater than that of the body portion 421 b.

The other end 421c of SMA bar 421 may be flat and may be provided with a bolt hole, such as a circle center bolt hole, for articulation with the inner cylinder.

In this embodiment, FIG. 10 shows a schematic view of the connection of a second buckling restraint bar to a second friction assembly. As shown in fig. 10, the spherical end 421a of the SMA stick 421 included in the second buckling restraining bar 42 is located in the receiving groove on the inner friction member a, and the spherical end 421a is still located in the receiving groove in the case of receiving a tensile force. Further, a certain amount of lubricating oil can be dripped in the accommodating groove.

As an option of the present invention, the radial dimension of the spherical end 421a of SMA stick 421 should be larger than the dimension of the receiving groove notch to avoid the buckling-restraining stick from slipping out of the receiving groove. In this case, during the process of preparing the inner friction member a, the spherical end 421a is placed in the receiving groove in advance, and then the spherical end 421a is fixedly connected with other structures of the SMA stick 421, for example, the spherical end 421a is connected with the body 421b of the SMA stick 421 by welding.

As another option of the present invention, the material of the spherical end 421a of the SMA stick 421 and/or the receiving groove may be rubber so that the spherical end 421a enters the receiving groove.

In this embodiment, the end of the SMA rod included in the buckling-restrained bar of the present invention, which faces away from the inner cylinder, may be tapered or truncated cone-shaped, and the radial dimension of the end gradually increases in the direction from the end to the other end; the end or the accommodating groove can be made of rubber, so that after the end is inserted into the accommodating groove, the part with the large radial size of the cone or the circular truncated cone can be clamped in the notch of the accommodating groove to prevent the end from sliding out of the accommodating groove.

In this embodiment, the end of the SMA stick facing away from the inner cylinder of the buckling-restrained bar of the present invention may be in a pawl structure, so that after the end is inserted into the receiving groove, the pawl structure of the SMA stick can be clamped in the notch of the receiving groove to prevent the end from sliding out of the receiving groove.

In this embodiment, the inner friction member of the present invention is not provided with a receiving groove, and one end of the SMA stick included in the buckling restraining bar of the present invention, which is away from the inner cylinder, may be hinged to the inner friction member.

In the present embodiment, fig. 6 shows a schematic view of an inner cylinder, in which (a) is a schematic view of an inner cylinder provided with a plurality of hinge joints, and (b) is a partially enlarged schematic view of (a) and an enlarged view is a first hinge joint. As shown in fig. 6, the inner cylinder 5 may be provided with a plurality of first hinge connectors 51 and a plurality of second hinge connectors 52. The first and second hinge connections may be identical in structure and shape, except for the location of their placement.

The first hinge connector 51 may be located above the second hinge connector 52. The first hinge connectors 51 are the same in number and correspond one-to-one to the first buckling restrained rods, and each first hinge connector 51 may be hinged to the other end (i.e., non-spherical end) of the corresponding first buckling restrained rod. Further, a plurality of the first hinge connectors 51 may be uniformly distributed on the same circumference of the inner cylinder 5, for example, in case that the number of the first hinge connectors 51 is 3, spaced 120 degrees therebetween, and located on the same plane.

The second hinge connectors 52 are equal in number and correspond to the second buckling restraining bars one by one, and each second hinge connector 52 may be hinged to the other end 421c (shown in fig. 10) of the corresponding second buckling restraining bar. Further, a plurality of second hinge connections 52 may also be evenly distributed on the same circumference of the inner cylinder 5.

In this embodiment, fig. 11 shows a schematic view of the connection of parts of the present invention. Wherein, as shown in fig. 11, the first friction component 31, the first buckling restraining bar 41 and the first hinge connector 51 (shown in fig. 6) on the inner cylinder 5 are connected in sequence. The second friction assembly 32, the second buckling restraining bar 42 and a second hinge connection 52 (shown in FIG. 6) on the inner barrel 5 are connected in sequence.

In the embodiment, the damping sleeve provided with the self-resetting connecting rod can be used for the building earthquake resistance and the mechanical damping.

In order to better understand the above exemplary embodiments of the present invention, the assembling method, the operation principle and the multi-stage energy consumption of the damping sleeve configured with the self-resetting connecting rod of the present invention are further explained below.

The method for assembling the damping sleeve configured with the self-resetting connecting rod can comprise the following steps:

firstly, an inner cylinder, an outer cylinder, a limiting plate, a buckling restraining rod and a friction assembly are produced in a factory in a standardized manner;

step two, respectively hinging one end of each buckling constraint rod on a corresponding hinge connecting piece reserved in the inner cylinder, placing the other end of each buckling constraint rod in a containing groove reserved in the corresponding inner friction piece, and dripping a certain amount of lubricating oil;

welding the limiting inner ring plate and the outer wedge-shaped friction piece at corresponding positions on the inner wall of the outer cylinder;

and step four, placing the assembled inner cylinder into the outer cylinder, and precisely attaching the matched inner friction piece and the matched outer friction piece.

The working principle of the damping sleeve configured with the self-resetting connecting rod is as follows:

the damping sleeve has 6 buckling restrained rods (i.e., 3 first buckling restrained rods, 3 second buckling restrained rods). When the inner cylinder is loaded, the load is transmitted to the inner friction piece from the inner cylinder along the buckling restraining rods symmetrically arranged with the inner cylinder, and the inner friction piece and the outer friction piece rub against each other to consume energy. When the load is great, rub to a certain degree, the limiting plate of welding at the urceolus inner wall restricts friction assembly and further removes. Meanwhile, the 6 symmetrically arranged buckling constraint rods consume energy in three compression modes and energy in three stretching modes. When the rubber sleeve and the metal sleeve wrapped outside the SMA rod are pulled by the SMA rod, the rubber sleeve can be tightly attached to the SMA rod, so that the weakening of the section is reduced; when the SMA rod is pressed, the compression resistance of the SMA can be improved under the wrapping of the rubber sleeve and the metal sleeve. And the SMA has good self-resetting performance and can be restored to the initial form after the load is unloaded.

The damping sleeve configured with the self-resetting connecting rod adopts multi-stage energy consumption. Wherein, the inner tube is upwards with the downstream, and its power consumption mode is all the same, takes inner tube upstream as an example:

in the small deformation stage: the first buckling constraint rod is pressed to push the first friction piece to rub and consume energy; the second buckling-restrained bar is pulled, but the second friction member is restrained by the second restraining plate. At this time, the first and second buckling restraining rods do not participate in energy consumption.

In the large deformation stage: the friction piece cannot move further due to the increase of friction force and the wedge-shaped structure, at the moment, the first buckling restraining rod is pressed to buckle and consume energy (the rubber sleeve and the metal sleeve play a role in preventing over-large buckling), and the second buckling restraining rod is pulled to yield and consume energy.

Multi-stage yielding is finally achieved.

Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.