A self-centering viscoelastic damping brace

Abstract

The application discloses a self-resetting viscoelastic damping support, wherein the flange sections of the upper steel member and the lower steel member are bonded by viscoelastic material to form a damping section; the end of the flange section is opposite to the limiting protrusion of the adjacent reinforcing section and is spaced from each other to form a gap section; the center line of the pulling side of the damping section is symmetrically distributed with an alloy cable group in the vertical bonding side direction, the shape memory alloy cable is at a set angle with the center line, and the two ends of each shape memory alloy cable are respectively threaded through the wire guide hole of the upper steel member pulling side and the wire guide hole of the lower steel member pulling side and fixed on the limiting end head, and the limiting end head is held at the wire guide hole adjacent to the limiting end head. The application has simple structure, clear movement mechanism, can well coordinate deformation and movement, and can show good performance under one-way tension and compression or reciprocating load such as earthquake.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of structural shock absorption or the field of function-recoverable structure, and particularly relates to a self-centering viscoelastic damping support capable of both energy dissipation and self-centering. BACKGROUND

[0002] A function-recoverable community, function-recoverable city or resilient city requires a structural system to achieve high performance, i.e. to be restored to use without repair or with slight repair after an earthquake. A self-centering structural system is one of the function-recoverable structures, which can dissipate seismic energy through specific devices, can not lose the operation function of the building under a rare intensity earthquake, and can be quickly repaired with small damage or even self-center to the original zero residual displacement state after being affected by a larger earthquake.

[0003] A self-centering support system in a self-centering structural system has been extensively researched and developed, such as a self-centering buckling restrained brace, a self-centering friction energy dissipation support and other metal devices. These devices usually have a limited number of working cycles, and are complex in structure, difficult to control in movement mechanism, and are not sensitive to wind vibration, which is not conducive to use in high-rise buildings. For the metal yield energy dissipation mechanism, when the metal energy dissipation part yields and experiences plastic deformation, it is difficult to restore to the original state, and the accumulated deformation will remain in the support member, gradually weakening the function of the support until the support fails. For the friction energy dissipation mechanism, when the friction interface fails or degrades, it will lead to unstable energy dissipation, and even larger permanent deformation. Even if a self-centering system is installed, the friction component will still generate friction resistance when restoring to the original position and state, which will seriously hinder the self-centering, so that the structure will retain a certain residual displacement after the earthquake. SUMMARY

[0004] The present application aims to provide a self-centering viscoelastic damping support, which overcomes the shortcomings of the prior art, provides better self-centering ability and more stable and reliable energy dissipation capacity, so that the residual displacement of the structure is very small or even zero.

[0005] The present application is implemented as follows: a self-centering viscoelastic damping support, which comprises an upper steel member, a lower steel member, a viscoelastic material, a limiting end and an alloy cable group composed of a plurality of parallelly arranged shape memory alloy cables; the upper steel member and the lower steel member each comprise a flange section, a gap section, a reinforcing section and an external terminal arranged in sequence, and the flange section comprises a bonding side and a pulling side adjacent to the bonding side; the pulling side is uniformly provided with wire guide holes with a diameter larger than the diameter of the shape memory alloy cable; wherein,

[0006] The upper steel member flange section bonding side and the lower steel member flange section bonding side are bonded by viscoelastic material to form a damping section; the flange section end and the limiting protrusion of the adjacent reinforcing section are opposite and spaced apart from each other to form the gap section;

[0007] The center line of the damping section in the vertical bonding side direction is mirror-symmetrically distributed with one alloy cable group, the shape memory alloy cable and the center line form a set angle, and the two ends of each shape memory alloy cable pass through the wire guide hole of the upper steel member pulling side and the wire guide hole of the lower steel member pulling side and are fixed on the limiting end, and the limiting end is held at the wire guide hole adjacent thereto.

[0008] Preferably, the support further comprises an anchoring member, the anchoring member comprises a support stud and a fastening nut, the support stud is provided with the wire guide hole; a plurality of anchoring screw holes are uniformly distributed on the pulling side; wherein,

[0009] One end of the support stud is screwed into the anchoring screw hole and fixed on the pulling side with the fastening nut, the end of the shape memory alloy cable passes through the wire guide hole of the support stud and is fixed on the limiting end, and the limiting end is held at the wire guide hole of the support stud under the tension of the shape memory alloy cable.

[0010] Preferably, the limiting end comprises a limiting block, a limiting rod and a limiting nut; one side of the limiting block is provided with a wire guide groove, and the other side of the limiting block relative to the wire guide groove is provided with a through hole which is in communication with the wire guide groove; the limiting rod comprises a connecting section and a limiting part; wherein,

[0011] The end of the shape memory alloy cable passes through the wire guide hole of the support stud and the limiting part of the limiting rod in sequence, the limiting part is located in the wire guide groove, and the connecting section passes through the through hole and is connected and tightened with the limiting nut, and the limiting part clamps the shape memory alloy cable in the wire guide groove of the limiting block.

[0012] Preferably, the limiting rod is in the shape of U-shaped clamp; the connecting sections at both ends of the limiting rod pass through the through hole and are connected and tightened with the limiting nut in sequence; the limiting part of the limiting rod is provided with anti-slip marks.

[0013] Preferably, the length and width of the flange section and the hardness and thickness of the viscoelastic material need to be determined according to the force borne by the support and the stiffness relationship between the shape memory alloy cable and the viscoelastic material;

[0014] The length and cross-sectional area of the shape memory alloy cable are determined by the force borne by the support and the related mechanical relationship;

[0015] The length of the interval section is the defined displacement of the support, and the length is determined according to the maximum shear strain of the viscoelastic material, the length of the shape memory alloy, and the maximum recoverable strain.

[0016] Preferably, the viscoelastic material is natural rubber or high damping rubber; wherein the bonding section of the upper steel member and the bonding section of the lower steel member are connected with the viscoelastic material through a vulcanization process, respectively.

[0017] Preferably, the external connection end comprises an end plate welded at the end of the reinforcing section and a connecting plate welded at the side of the end plate away from the reinforcing section, and the connecting plate is provided with an external connection hole.

[0018] The present application overcomes the shortcomings of the prior art and provides a self-resetting viscoelastic damping support, which is composed of a viscoelastic material, a shape memory alloy cable, a steel member, a limiting end, and an anchoring member, wherein the shear deformation of the viscoelastic material and the tensile deformation of the shape memory alloy cable dissipate energy, and the super-elasticity of the shape memory alloy cable is used for resetting. The organic and reasonable combination of the two will produce good energy dissipation capacity and strong self-resetting capacity, which can reduce the residual displacement of the structure, and even make the structure not produce residual displacement.

[0019] Compared with the shortcomings and deficiencies of the prior art, the present application has the following beneficial effects:

[0020] The support of the present application combines the viscoelastic material and the shape memory alloy cable, so that the self-resetting viscoelastic damping support has a simple structure and clear movement mechanism, the superior characteristics of the two can be fully utilized, and the two can deform and move well. Whether under unidirectional tension and compression or under reciprocating load such as earthquake, the support can exhibit good performance, especially under the action of earthquake, the good energy dissipation capacity and strong self-resetting capacity make the residual displacement of the structure very small, and even no residual displacement is produced. At the same time, the support has simple combination, easy connection, and convenient installation. Even if damage occurs under rare intensity earthquake, the entire device or a part thereof can be easily replaced.

[0021] In addition, the support of the present application will exhibit the characteristics of the viscoelastic material under small vibration, and utilize its own viscoelastic characteristics to make the support dissipate energy while restoring to the original state. Especially under the action of wind vibration, the role of the viscoelastic material is more obvious, which can effectively reduce the wind vibration response, so that the support device can also be used in high-rise buildings.

[0022] When the shape memory alloy cable is in a linear elastic state, the support of this invention can provide additional stiffness, and energy dissipation is achieved by the relatively small displacement of the viscoelastic material. When the support undergoes a larger displacement, the shape memory alloy cable crystal is in the stage of austenite to martensite transformation, i.e., the hyperelastic stage or pseudoelastic stage. Both the shape memory alloy cable and the viscoelastic material contribute to energy dissipation, and the hyperelastic properties of the shape memory alloy cable provide a self-restoring force, allowing the component to return to its initial state. As the deformation increases, the weakened nonlinear properties of the shape memory alloy cable will reduce the base shear force of the structure.

[0023] Furthermore, the support provided by this invention can provide additional stiffness and damping, which, when used in conjunction with a frame structure, consumes a significant portion of the lateral forces. This appropriately and effectively reduces the peak response of the structure, protects structural and non-structural components, and improves the seismic performance and functional recoverability of the entire building. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the self-resetting viscoelastic damping support of the present invention;

[0025] Figure 2 yes Figure 1 A schematic diagram of the side structure of the support shown;

[0026] Figure 3 yes Figure 1 Top view of the support shown;

[0027] Figure 4 This is a front structural schematic diagram of one embodiment of the anchoring component of the present invention;

[0028] Figure 5 yes Figure 4 A schematic diagram of the side structure of the anchoring member shown;

[0029] Figure 6 yes Figure 4 A top view of the anchoring component shown.

[0030] Figure 7 yes Figure 4 The diagram shows a bottom view of the limiting block in the anchoring component. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0032] like Figure 1-7 As shown, where, Figure 1is a three-dimensional structural schematic diagram of an embodiment of a self-resetting viscoelastic damping support of the present application; Figure 2 is Figure 1 is a side structural schematic diagram of the support shown in Figure 3 is Figure 1 is a top view of the support shown in Figure 4 is a front structural schematic diagram of an embodiment of an anchoring member of the present application; Figure 5 is Figure 4 is a side structural schematic diagram of the anchoring member shown in Figure 6 is Figure 4 is a top structural schematic diagram of the anchoring member shown in Figure 7 is Figure 4 is a bottom structural schematic diagram of the limiting block in the anchoring member shown in

[0033] A self-resetting viscoelastic damping support, comprising an upper steel member 1, a lower steel member 2, a viscoelastic material 3, a limiting end 4, and a shape memory alloy cable group composed of a plurality of parallelly arranged shape memory alloy cables 5; the upper steel member 1 and the lower steel member 2 each comprise a flange section A, a gap section B, a reinforcing section C, and an external connection end D arranged in sequence, the flange section A comprises a bonding side and a pulling side adjacent to the bonding side; the pulling side is uniformly provided with wire holes with diameters greater than the diameters of the shape memory alloy cables 5; wherein the bonding side of the flange section A of the upper steel member 1 and the bonding side of the flange section A of the lower steel member 2 are bonded by the viscoelastic material 3 to form a damping section; the end portions of the flange section A and the limiting protrusions of the adjacent reinforcing section C are opposite to each other and are spaced apart by the gap section B; the pulling side of the damping section is mirror-symmetrically distributed with one of the shape memory alloy cable groups on the center line in the vertical bonding side direction, the shape memory alloy cable 5 and the center line form a set angle, and the two ends of each shape memory alloy cable 5 pass through the wire holes of the pulling sides of the upper steel member 1 and the lower steel member 2 and are fixed on the limiting end 4, and the limiting end 4 is held at the wire hole adjacent thereto.

[0034] In the embodiment of the present application, the upper steel member 1 and the lower steel member 2 should be completely symmetrical structures, which need to be cast with special molds, wherein the reinforcing section C is the root of the steel member, the bottom side of the flange section A of the upper steel member 1 is set as the bonding side, the top side of the lower steel member 2 is set as the bonding layer, and the two opposite sides adjacent to the bonding layer are both pulling sides, the flange section A of the upper steel member 1 and the lower steel member 2 should have a certain thickness, that is, the pulling side should have a certain thickness, so as to facilitate the anchoring of the shape memory alloy cable group on the pulling side of the upper steel member 1 and the lower steel member 2.

[0035] After the damping section is formed by bonding the upper steel component 1 and the lower steel component 2, the same alloy cable groups are set on the tension sides in both opposite directions. Taking the tension side of one side of the damping section as an example, a pair of alloy cable groups are set on this tension side in a mirror-symmetrical manner. Each alloy cable group is composed of several parallel and equidistant shape memory alloy cables 5 (e.g., Figure 1 The four shape memory alloy cables 5 shown are connected at one end to the tension side of the upper steel member 1 and at the other end to the tension side of the lower steel member 2. The connected shape memory alloy cables 5 are in a taut state, and each cable maintains the same tautness. In this embodiment of the invention, the shape memory alloy cables 5 can be woven from multiple shape memory alloy wires.

[0036] In fact, the purpose of setting a pair of alloy cable groups in a mirror-symmetrical manner on the tension side is to ensure that, in the left-right displacement trend of the self-resetting viscoelastic damping support, there is always one alloy cable group that plays a role in tightening and resetting. In this embodiment of the invention, when anchoring each shape memory alloy cable 5, the principle of oblique symmetrical anchoring on both sides and anchoring from the middle to both ends should be followed. Specifically, the so-called oblique symmetrical anchoring on both sides means that, with the center line of the tension side in the direction perpendicular to the bonding side as a reference, an alloy cable group is mirror-symmetrically distributed on both sides of the center line, and the shape memory alloy cable 5 in each alloy cable group forms a set angle with the center line. Due to the oblique arrangement of the shape memory alloy cable 5, in the left displacement trend of the self-resetting viscoelastic damping support, the alloy cable group on the right side of the center line can play a role in tightening and resetting, and conversely, in the right displacement trend of the self-resetting viscoelastic damping support, the alloy cable group on the left side of the center line can play a role in tightening and resetting.

[0037] In addition, the alloy cable groups on the tension sides of the two opposite directions of the damping section are arranged symmetrically to ensure that the tension and reset forces of the alloy cable groups on the left and right sides of the centerline on the self-resetting viscoelastic damping support are balanced. The specific structure is shown in the figure and will not be described in detail here.

[0038] In this embodiment of the invention, the area of ​​the wire hole is larger than the cross-sectional area of ​​the shape memory alloy cable 5. This ensures that during movement of the self-resetting viscoelastic damping support, the set of shape memory alloy cables 5 not under tension can undergo radial expansion and contraction along the wire hole, guaranteeing coordinated movement and deformation of all parts of the device. This prevents increased resistance to the entire device and avoids damage to the connection between the steel components and the viscoelastic material 3. In other words, regardless of whether the device is under tension or compression, only one set of shape memory alloy cables 5 is active, undergoing tensile deformation. The other set of shape memory alloy cables 5 is not under tension. The tensioned shape memory alloy cable 5 moves with the steel components, and the viscoelastic material 3 undergoes shear deformation during movement. Due to the vulcanization process, the upper and lower steel components are well bonded and will not be easily torn or peeled off unless subjected to exceptionally large forces. Figure 1To illustrate, if the left end is fixed and the right end is applied with pressure, the lower steel member 2 moves, at this time the shape memory alloy cable 5 of the left group is stretched, and the shape memory alloy cable 5 of the right group is compressed. The purpose of this arrangement is to allow the shape memory alloy cable 5 not subjected to tension to move freely and stretch and contract, so as not to increase the destructive force of the device, which is equivalent to allowing the upper and lower steel members to be separated from the viscoelastic material 3 and to destroy the connection with the viscoelastic material, therefore, the shape memory alloy cable not subjected to tension needs to be allowed to move freely.

[0039] In the embodiment of the present application, the viscoelastic material 3 is natural rubber or high-damping rubber; wherein the bonding side of the upper steel member 1 and the bonding side of the lower steel member 2 are connected with the viscoelastic material 3 through vulcanization process. In the vulcanization process, a certain distance is left between the end of the flange section A of the upper steel member 1 and the end of the reinforcing section C of the lower steel member 2, that is, the gap section B of the upper steel member 1 (for the same reason, the gap section B of the lower steel member 2 should be equal in length to the gap section B of the upper steel member 1) should be able to adapt to the movement and deformation of the upper and lower steel members 2 and the viscoelastic material 3, and the distance of the gap section B is equivalent to the limited displacement of the self-resetting viscoelastic damping support, which is calculated and set according to the maximum shear strain of the viscoelastic material 3, the length of the shape memory alloy and the maximum recoverable strain.

[0040] Specifically, if the length of the shape memory alloy is assumed to be l = 600 mm, and the maximum recoverable strain ε is measured by experiment to be 8%, that is, ε = 8%, then the maximum elongation of the shape memory alloy cable 5 within the recoverable strain range is:

[0041] Δl = l × ε = 600 × 8% = 48 mm (1)

[0042] The maximum shear strain γ of the viscoelastic material 3 is set to 250%, and the thickness t is set to 20 mm, then the shear displacement Δ γ of the viscoelastic material 3 can be calculated by the following formula:

[0043] Δ γ = t × γ = 20 × 250% = 50 mm (2)

[0044] From the safety of the device and the deformation coordination of the shape memory alloy cable 5 and the viscoelastic material 3, Δl and Δ γThe smaller value of the two is the setting displacement of the device. In this way, the peel strength of the viscoelastic material 3 and the vulcanization process of the device can be guaranteed, and the safe operation of the shape memory alloy can also be guaranteed, preventing the super-elasticity characteristics from being damaged to affect the working performance of the entire support. In addition, the length and width of the steel member bonding section and the hardness and thickness of the viscoelastic material 3 need to be determined according to the force borne by the support and the rigidity relationship between the shape memory alloy 5 and the viscoelastic material 3; in addition, the length and cross-sectional area of the shape memory alloy cable 5 are determined by the force borne by the support and the related mechanical relationship.

[0045] In the embodiment of the present application, more specifically, the outer end D of the upper steel member 1 and the lower steel member 2 comprises an end plate D-1 welded at the end of the reinforcing section C, the cross-sectional area of the end plate D-1 is larger than that of the reinforcing section C of the steel member; a connecting plate D-2 is welded on the side of the end plate D-1 away from the reinforcing section C, and the connecting plate D-2 is provided with an outer connecting hole D-3 for connecting the high-strength bolt with the main structure.

[0046] In the further embodiment of the present application, more specifically, the present application provides a specific form of the connection structure of the shape memory alloy cable 5 and the wire hole on the pulling side, and the support further comprises an anchoring member 6, the anchoring member 6 comprises a support stud 6-1 and a fastening nut 6-2, the support stud 6-1 is provided with the wire hole; a plurality of anchoring screw holes are uniformly distributed on the pulling side (the view is omitted in the figure); wherein one end of the support stud 6-1 is screwed into the anchoring screw hole and fixed on the pulling side by cooperating with the fastening nut 6-2, the end of the shape memory alloy cable 5 passes through the wire hole of the support stud 6-1 and is fixed on the limiting end head 4, and the limiting end head 4 is held at the wire hole of the support stud 6-1 under the tension of the shape memory alloy cable 5.

[0047] In the embodiment of the present application, in order to facilitate the anchoring of the shape memory alloy cable 5, more specifically, the limiting end head 4 comprises a limiting block 4-1, a limiting rod 4-2 and a limiting nut 4-3; one side of the limiting block is provided with a wire groove, and the other side of the limiting block relative to the wire groove is provided with a through hole, which leads to the wire groove; the limiting rod comprises a connecting section and a limiting part; wherein the end of the shape memory alloy cable 5 passes through the wire hole of the support stud 6-1 and the limiting part of the limiting rod in sequence, the limiting part is located in the wire groove, and the connecting section passes through the through hole and is connected and tightened by cooperating with the limiting nut, and the limiting part clamps the shape memory alloy cable 5 in the wire groove of the limiting block.

[0048] In the embodiment of the present application, in order to ensure the firmness of anchoring, more specifically, the limiting rod is in the shape of a U-shaped clamp; the connecting sections at both ends of the limiting rod respectively pass through the through holes and are connected and tightened with limiting nuts; the limiting part of the limiting rod is provided with anti-skid marks 4-4. In the actual application of the present application, the specific anchoring method of the anchoring member 6 is as follows: first, the fastening nut 6-2 is tightened to the end of the support stud 6-1 without a wire hole, then the end of the support stud 6-1 without the wire hole is fastened into the anchoring hole in the upper steel member 1, then the shape memory alloy cable 5 is passed through the wire hole of the support stud 6-1 and the U-shaped limiting part of the limiting rod, the connecting sections at both ends of the limiting rod respectively pass through the through holes of the limiting blocks and are connected and tightened with the corresponding limiting nuts, and the limiting part clamps the anchoring point of the shape memory alloy cable 5; wherein, according to the distance from the already anchored point to the shape memory alloy cable 5 anchoring point of the corresponding lower steel member 2, the length of the shape memory alloy cable 5 is determined, and the wire hole on the support stud at the corresponding position is to be in harmony, so as to ensure that the shape memory alloy cable 5 is anchored in a straight and inclined manner, and finally the other end of the shape memory alloy cable 5 is anchored at the corresponding position of the lower steel member 2 by the same method.

[0049] In the practical application of the present application, when the left end of the self-centering viscoelastic damping support is fixed and the right end is subjected to a pulling force, the lower steel member 2 is subjected to a pulling movement, driving the viscoelastic material 3 to be subjected to a shearing deformation, and the right half of the shape memory alloy cable 5 is stretched, and the two are cooperatively deformed to realize the energy dissipation of the entire device. During the pulling deformation of the device, the left half of the shape memory alloy cable 5 will be subjected to a radial expansion and contraction movement along the wire guide hole of the support stud 6-1 in the anchoring member 6, so that the shape memory alloy cable 5 not subjected to the pulling force can move freely without constraint, without increasing the resistance of the entire device and damaging the connection between the steel member and the viscoelastic material 3. After the pulling force is removed, the right half of the shape memory alloy cable 5 is subjected to a tensile deformation, and the crystal phase in the material will be transformed, and the super-elasticity will be exhibited and play a role, which will pull the lower steel member 2 to restore to the initial position, and also drive and help the viscoelastic material 3 along the contact surface of the lower steel member 2 to restore to the original shearing deformation. When the reverse loading is applied, i.e. the lower steel member 2 is subjected to a compression, the movement of the lower steel member 2 will drive the viscoelastic material 3 to be subjected to a shearing deformation, and the left half of the shape memory alloy cable 5 is stretched, and the two are cooperatively and adaptively deformed to realize the energy dissipation of the entire device. During the compression deformation of the device, the right half of the shape memory alloy cable 5 will be subjected to a radial expansion and contraction movement along the wire guide hole of the support stud 6-1 in the anchoring member 6, so that the shape memory alloy cable 5 not subjected to the pulling force can move freely without constraint, without increasing the resistance of the entire device and damaging the connection between the steel member and the viscoelastic material 3. After the compression is removed, the left half of the shape memory alloy cable 5 is subjected to a tensile deformation, and the crystal in the material will be transformed from austenite to martensite, and the super-elasticity will be exhibited and play a role, which will pull the lower steel member 2 to restore to the initial position, and also drive and help the viscoelastic material 3 along the contact surface of the lower steel member 2 to restore to the original shearing deformation. Thus, in the embodiment of the present application, the shearing deformation of the viscoelastic material 3 and the tensile deformation of the shape memory alloy cable 5 dissipate energy, the super-elasticity of the shape memory alloy cable 5 is used for resetting, and the reasonable combination of the two will produce good energy dissipation capacity and strong self-centering ability, which can reduce the residual displacement of the structure, and even make the structure not produce residual displacement.

[0050] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A self-resetting viscoelastic damping support, characterized in that, The support includes an upper steel component, a lower steel component, a viscoelastic material, a limiting end, and an alloy cable assembly composed of several parallel-arranged shape memory alloy cables. Both the upper and lower steel components include sequentially arranged flange sections, gap sections, reinforcing sections, and external ends. Each flange section includes an adhesive side and a tension side adjacent to the adhesive side. The tension side is evenly distributed with wire holes having a diameter larger than that of the shape memory alloy cable. The upper steel component flange section and the lower steel component flange section are bonded together by a viscoelastic material to form a damping section; the end of the flange section is directly opposite to the limiting protrusion of the adjacent reinforcing section and is spaced apart from each other to form the gap section. The traction side of the damping section has an alloy cable group that is mirror-symmetrically distributed on the center line in the direction perpendicular to the bonding side. The shape memory alloy cable forms a set angle with the center line. The two ends of each shape memory alloy cable pass through the wire hole of the upper steel member traction side support stud and the lower steel member traction side support stud, respectively, and are fixed to the limiting end. The limiting end is held at the adjacent wire hole. The length and width of the flange section, as well as the hardness and thickness of the viscoelastic material, need to be determined based on the force exerted on the support and the stiffness relationship between the shape memory alloy cable and the viscoelastic material. The length and cross-sectional area of ​​the shape memory alloy cable are determined by the force exerted on the support and the related mechanical relationships; The length of the void segment is the limited displacement of the support, and this length is calculated and determined based on the maximum shear strain and thickness of the viscoelastic material, as well as the length and maximum recoverable strain of the shape memory alloy. The gap section adapts to the movement and deformation of the upper and lower steel components and viscoelastic materials. The distance of the gap section is equivalent to the limited displacement of the self-resetting viscoelastic damping support. It is calculated and set based on the maximum shear strain and thickness of the viscoelastic material, as well as the length and maximum recoverable strain of the shape memory alloy. The length of the gap section must simultaneously satisfy: B = min(t × γ) max ,l×ε max ); Where t is the thickness of the viscoelastic material; γ max Its maximum shear strain; l is the length of the shape memory alloy; ε max To its maximum recoverable strain.

2. The self-resetting viscoelastic damping support as described in claim 1, characterized in that, The support also includes an anchoring component, which includes a support stud and a fastening nut. The support stud is provided with the wire hole. Several anchoring screw holes are evenly distributed on the tension side. One end of the support stud is screwed into the anchoring screw hole and fixed to the tension side with the fastening nut. The end of the shape memory alloy cable passes through the wire hole of the support stud and is fixed to the limiting end. The limiting end is held against the wire hole of the support stud under the tension of the shape memory alloy cable.

3. The self-resetting viscoelastic damping support as described in claim 2, characterized in that, The limiting end includes a limiting block, a limiting rod, and a limiting nut; the limiting block has a wire groove on one side and a through hole on the side of the limiting block opposite to the wire groove, the through hole being connected to the wire groove; the limiting rod includes a connecting section and a limiting part; wherein, the end of the shape memory alloy cable passes sequentially through the wire hole of the supporting stud and the limiting part of the limiting rod, the limiting part is located in the wire groove, and the connecting section passes through the through hole and is connected and tightened with the limiting nut, the limiting part clamping the shape memory alloy cable in the wire groove of the limiting block.

4. The self-resetting viscoelastic damping support as described in claim 3, characterized in that, The limiting rod is U-shaped; the connecting sections at both ends of the limiting rod pass through a through hole and are connected and tightened with a limiting nut; the limiting part of the limiting rod is provided with anti-slip grooves.

5. The self-resetting viscoelastic damping support as described in claim 1, characterized in that, The viscoelastic material is natural rubber or high-damping rubber; wherein the bonding sections of the upper steel component and the lower steel component are connected to the viscoelastic material through a vulcanization process.

6. The self-resetting viscoelastic damping support as described in claim 1, characterized in that, The external end includes an end plate welded to the end of the reinforcing section and a connecting plate welded to the side of the end plate away from the reinforcing section, and the connecting plate is provided with an external connection hole.

Images