CN113250339A - Self-resetting zero-rigidity shape memory alloy shock isolator - Google Patents
Self-resetting zero-rigidity shape memory alloy shock isolator Download PDFInfo
- Publication number
- CN113250339A CN113250339A CN202110597423.6A CN202110597423A CN113250339A CN 113250339 A CN113250339 A CN 113250339A CN 202110597423 A CN202110597423 A CN 202110597423A CN 113250339 A CN113250339 A CN 113250339A
- Authority
- CN
- China
- Prior art keywords
- shape memory
- memory alloy
- undersetting
- shock insulation
- sliding block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/36—Bearings or like supports allowing movement
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a self-resetting zero-rigidity shape memory alloy shock isolator, which comprises: horizontal shock insulation ring, upper and lower support, upper and lower slider, the undersetting is located inside the upper bracket, and horizontal shock insulation ring is located the bottom upper flat surface of the inside of undersetting to be located between the lateral wall of undersetting and the lateral wall of upper bracket, the lower slider is located the bottom upper flat surface of the inside of undersetting, both sliding connection, the upper portion sliding connection of lower slider has the top shoe, the higher authority sliding connection of top shoe has the upper support, horizontal shock insulation ring be shape memory alloy rubber horizontal shock insulation ring, the bottom upper flat surface of the inside of undersetting is zero camber, the bottom upper flat surface of the inside of lower slider and undersetting closely laminates. The invention can effectively isolate transverse earthquake motion, reduce the collision between the isolated structure and the isolation trench retaining wall or the adjacent structure, and has the advantages of small rigidity, low cost and capability of eliminating residual displacement.
Description
Technical Field
The invention relates to the field of seismic resistance, seismic reduction and seismic isolation, in particular to a self-resetting zero-rigidity shape memory alloy seismic isolator.
Background
The basic seismic isolation technology can remarkably reduce the seismic energy transmitted into the superstructure and reduce the damage of the earthquake to the superstructure, thereby being popularized and applied in a large amount for a long time in the world. On the one hand, the efficiency of base isolation mainly depends on the basic period of the isolation system. According to the theory of reaction spectrum, the longer the period of the seismic isolation system is, the smaller the acceleration response of the superstructure is, but the horizontal displacement of the seismic isolation layer is also greatly increased, which may cause the base of the seismic isolation structure to collide with the retaining wall of the peripheral seismic isolation trench or other structures. Relevant personnel carry out earthquake response actual measurement on a 2-layer foundation shock insulation structure, namely an FCC building in Northridge earthquake in America, find that an earthquake response curve of the structure has sudden change in a certain time period, and carry out system identification on the structure to find that collision is generated between a structure base plate and a peripheral retaining wall in the earthquake. On the other hand, most of the existing laminated rubber supports, sliding friction pendulum supports and the like are equivalent linear stiffness systems, the seismic isolation period is single, and for pulse seismic motion containing long period components, the seismic isolation layer still has the risk of approaching or resonating. The quasi-zero stiffness shock isolation device has the characteristics of low initial stiffness and high later-stage stiffness, and no obvious peak frequency exists in a frequency response function, so that potential hidden dangers of the shock isolation device can be effectively solved.
The substation facilities include elements such as ceramic bushings that are susceptible to brittle failure. The sleeve has a slender structure and low natural vibration frequency, and can easily resonate under the action of an earthquake, and the transformer body has an amplification effect on ground movement and can generate large bending moment and shearing force at the root of the sleeve; the porcelain itself is brittle material, and the deformability is poor, and after using traditional friction pendulum isolation bearing, the transformer horizontal displacement is very big, makes the porcelain bushing destroy more easily. In an earthquake, the phenomenon that the root of the insulating sleeve is broken, the upper porcelain sleeve and the flange are mutually dislocated and the rubber gasket is extruded out frequently occurs, so that the sleeve leaks oil and fires are caused.
In combination with the above two points, it can be seen that although the conventional friction pendulum type seismic isolation bearing can provide a high vertical bearing capacity and a strong horizontal deformation capacity, the following problems still exist.
1) The restoration cannot be well realized after a strong earthquake;
2) large horizontal displacement occurs under severe earthquake, which causes collision between the superstructure and the earth-retaining wall of the seismic isolation trench or an adjacent structure, or causes brittle failure of components such as porcelain bushings in substation facilities.
The publication number is CN108086511A, the invention and creation name is: the utility model provides a become three-dimensional isolation bearing of rigidity, the metal rubber that shock insulation adopted, but its rigidity sclerosis is too fast, and although its elasticity performance is comparatively ideal, still can produce plastic deformation under rare little load effect, influences subsequent use, also need change when serious.
Disclosure of Invention
Aiming at the limitation that the existing shock insulation support can not effectively limit the displacement of a large-shock lower slider and the residual displacement of the support after shock insulation, the invention provides a novel self-resetting zero-rigidity shape memory alloy shock isolator by utilizing the strain hardening characteristic and the temperature rise self-resetting characteristic of shape memory alloy rubber, and provides shock insulation measures or means with better performance for an upper structure.
The technical scheme adopted by the invention is as follows: a self-resetting zero stiffness shape memory alloy seismic isolator comprising: horizontal shock insulation ring, on, the undersetting, on, the lower slider, the bottom of undersetting is outer along fixing on basic cushion cap, the upper bracket with by shock insulation structure fixed connection, the undersetting is located inside the upper bracket, horizontal shock insulation ring is located the bottom upper flat surface of the inside of undersetting, and be located between the lateral wall of undersetting and the lateral wall of upper bracket, the lower slider is located the bottom upper flat surface of the inside of undersetting, both sliding connection, the upper portion sliding connection of lower slider has the top shoe, the higher authority sliding connection of top shoe has the top bearing, horizontal shock insulation ring be shape memory alloy rubber horizontal shock insulation ring, the bottom upper flat surface of the inside of undersetting is zero camber, the bottom upper flat surface of the inside of lower slider and undersetting closely laminates.
Furthermore, an annular anti-pulling baffle is fixedly arranged on the outer edge plane of the upper part of the lower support.
Furthermore, the upper part and the side wall of the upper support are respectively provided with a circle of convex edges, and the inner ring of the annular anti-pulling baffle plate is positioned between the two convex edges.
Furthermore, the side wall of the lower support is fixedly connected with a plurality of stiffening ribs.
Furthermore, the lower support and the lower sliding block are tightly attached to the support plate, so that the shock insulation period formed by the lower support and the lower sliding block approaches infinity; the shape memory alloy rubber horizontal shock insulation ring provides quasi-zero shock insulation rigidity and restoring force in the horizontal direction.
Furthermore, the contact surface between the lower support and the lower sliding block, the contact surface between the lower sliding block and the upper sliding block, and the contact surface between the upper sliding block and the upper support are coated with polytetrafluoroethylene coatings.
Furthermore, the friction coefficient between the lower support, the lower sliding block, the upper sliding block and the upper support is 0.03-0.05.
Furthermore, the shape memory alloy rubber horizontal shock insulation ring eliminates residual deformation of the shock isolator caused by an excessive load effect through a temperature rise measure.
The invention realizes the movement of the lower sliding block, the upper sliding block and the upper support in the horizontal direction through the lower support with zero curvature. The lower sliding block ensures that the upper sliding block and the upper support can generate displacement relative to the lower support. The relative sliding of the upper support, the upper sliding block and the lower sliding block can ensure that the upper structure and the upper support plate are kept horizontal relative to the base bearing platform to a certain extent. Under the action of horizontal earthquake motion, the upper support, the upper sliding block and the lower sliding block generate horizontal displacement to cause the shape memory alloy rubber horizontal earthquake isolation ring to deform, so that earthquake energy is consumed, and the isolation of the transverse earthquake motion is realized.
The shape memory alloy rubber material adopted in the invention can eliminate the residual deformation caused by the action of overlarge load by a simple temperature rise measure. In the temperature rising process, the spiral spring in the shape memory alloy rubber can be restored to the state when the shape memory alloy rubber is molded and pressed, and the thrust action on the lower sliding block is generated, so that the residual deformation of the shock isolator can be restored. When the shape memory alloy rubber material adopted in the invention is deformed by external force, the helical springs in the shape memory alloy rubber material can be contacted with each other and extruded to mutually slide, and part of energy can be consumed by the generated coulomb friction while elastic potential energy is generated.
The invention has the advantages and beneficial effects that: the invention can effectively isolate transverse earthquake motion, reduce the collision between the isolated structure and the isolation trench retaining wall or the adjacent structure, and has the advantages of small rigidity, low cost and capability of eliminating residual displacement. The shape memory alloy rubber material adopted in the invention has the strain hardening characteristic, namely, the rigidity is low when the deformation is small, and the rigidity is improved in a nonlinear way along with the increase of the deformation. Under the action of small earthquake, the metal rubber deforms less, the rigidity of the metal rubber is lower, the limiting effect on the displacement of the upper support plate connected with the upper structure is smaller, and the shock insulation effect under small earthquake and medium earthquake can be better realized; under the action of a large earthquake, the horizontal rigidity of the support is in a nonlinear increasing trend, the support can be prevented from further generating larger horizontal deformation, the displacement of the upper portion of the shock-isolated structure can be effectively reduced while the shock isolation function is realized, and therefore collision between the upper portion structure and a shock isolation groove retaining wall or an adjacent structure is prevented, and brittle failure caused by overlarge deformation of low-ductility connecting components such as porcelain sleeves in transformer substation facilities is prevented.
Drawings
FIG. 1 is a cross-sectional view of a self-resetting zero stiffness shape memory alloy seismic isolator in accordance with the present invention;
FIG. 2 is a schematic view of a semi-annular anti-plucking baffle;
FIG. 3 is a top view of the decoupler;
FIG. 4 is an assembly view of the decoupler;
the vibration isolation device comprises a lower support 1, a lower support 2, an upper support 3, an upper sliding block 4, a lower sliding block 5, a shape memory alloy rubber horizontal vibration isolation ring 6, an anti-pulling baffle 7, an anchor rod 8 and a stiffening rib.
Detailed Description
The invention will be further elucidated by way of example with reference to the drawing.
Example 1
As shown in fig. 1-4, a self-resetting zero stiffness shape memory alloy seismic isolator comprising: horizontal shock insulation ring, on, the undersetting, on, the lower slider, the bottom of undersetting is outer along fixing on basic cushion cap through many stock, the upper bracket with pass through bolt fixed connection by shock insulation structure, the undersetting is located inside the upper bracket, horizontal shock insulation ring is located on the plane on the bottom of the inside of undersetting, and be located between the lateral wall of undersetting and the lateral wall of upper bracket, the lower slider is located on the plane on the bottom of the inside of undersetting, both sliding connection, the upper portion sliding connection of lower slider has the top shoe, the higher authority sliding connection of top shoe has the upper bracket, horizontal shock insulation ring be shape memory alloy rubber horizontal shock insulation ring, the bottom upper plane of the inside of undersetting is zero camber, the bottom upper plane of the inside of lower slider and undersetting closely laminates. And an annular anti-pulling baffle is fixedly arranged on the outer edge plane of the upper part of the lower support through bolts. The upper part and the side wall of the upper support are respectively provided with a circle of convex edges, and the inner ring of the annular anti-pulling baffle is positioned between the two convex edges. The side wall of the lower support is fixedly connected with a plurality of stiffening ribs. The lower support, the lower sliding block and the support plate are tightly attached, so that the shock insulation period formed by the lower support and the lower sliding block approaches infinity; the shape memory alloy rubber horizontal shock insulation ring provides quasi-zero shock insulation rigidity and restoring force in the horizontal direction. The contact surface between lower carriage and the gliding block, the contact surface between lower slider and the top shoe, the contact surface between top shoe and the upper bracket all coat and have the polytetrafluoroethylene coating, guarantee to produce relative slip smoothly. And the friction coefficient among the lower support, the lower sliding block, the upper sliding block and the upper support is 0.03-0.05. The shape memory alloy rubber horizontal shock insulation ring eliminates residual deformation of the shock isolator caused by an overlarge load effect through a temperature rise measure. The shape memory alloy rubber horizontal shock insulation ring 5 is formed by integral punch forming. The lower support plate of this example passes through 10 stock anchors that diameter is 22mm on the concrete cushion cap, or diameter and the number of stock can be selected after calculating according to specific earthquake effort demand. The annular anti-pulling baffle is fixed on the lower support plate through 6 10.9-level high-strength bolts with the diameter of 22mm, or the diameter, the grade and the number of the high-strength bolts can be selected after calculation according to specific anti-pulling force requirements. In the embodiment, 10 stiffening ribs are arranged on the lower support plate and used for increasing the horizontal earthquake shearing force which can be borne by the self-resetting zero-rigidity shape memory alloy shock isolator, or the size and the number of the stiffening ribs are calculated according to the actual stress state of the self-resetting zero-rigidity shape memory alloy shock isolator. Under the action of small and medium earthquakes, the horizontal rigidity of the support is lower, so that the earthquake action can be effectively isolated; under the action of large shock, the horizontal rigidity of the support is in a nonlinear increasing trend, the shock insulation function is realized, and meanwhile, the deformation of the upper structure can be effectively reduced, so that the problem of collision of the upper structure due to overlarge displacement is solved or prevented. Under the action of horizontal earthquake motion, the upper support, the upper sliding block and the lower sliding block generate horizontal displacement to cause the shape memory alloy rubber shock insulation ring to deform, so that earthquake energy is consumed, and the horizontal earthquake motion is isolated. Meanwhile, the shape memory alloy rubber has the strain hardening characteristic, namely, the rigidity is low when the deformation is small, the rigidity is improved in a nonlinear way along with the increase of the deformation, and the quasi-zero rigidity characteristic is presented. The shape memory alloy has a shape memory effect, and after the shock isolator generates plastic deformation under the action of a strong earthquake, the shock isolator can induce the shape memory alloy rubber to generate martensite phase transformation through a simple heating measure so as to recover to a punch forming state, further push the lower sliding block to an initial position, and achieve the purpose of automatically eliminating residual deformation of the shock isolator.
Claims (8)
1. A self-resetting zero stiffness shape memory alloy seismic isolator comprising: horizontal shock insulation ring, on, the undersetting, on, the lower slider, the bottom of undersetting is outer along fixing on basic cushion cap, the upper bracket with by shock insulation structure fixed connection, the undersetting is located inside the upper bracket, horizontal shock insulation ring is located the bottom upper flat surface of the inside of undersetting, and be located between the lateral wall of undersetting and the lateral wall of upper bracket, the lower slider is located the bottom upper flat surface of the inside of undersetting, both sliding connection, the upper portion sliding connection of lower slider has the top shoe, the higher authority sliding connection of top shoe has the top shoe, it is characterized in that: the horizontal shock insulation ring is a shape memory alloy rubber horizontal shock insulation ring, the upper plane of the bottom of the inner part of the lower support is zero in curvature, and the lower sliding block is tightly attached to the upper plane of the bottom of the inner part of the lower support.
2. The self-resetting zero-stiffness shape memory alloy seismic isolator of claim 1, wherein: and an annular anti-pulling baffle is fixedly arranged on the outer edge plane of the upper part of the lower support.
3. The self-resetting zero-stiffness shape memory alloy seismic isolator of claim 2, wherein: the upper part and the side wall of the upper support are respectively provided with a circle of convex edges, and the inner ring of the annular anti-pulling baffle is positioned between the two convex edges.
4. A self-resetting zero stiffness shape memory alloy seismic isolator as claimed in any one of claims 1 to 3, wherein: the side wall of the lower support is fixedly connected with a plurality of stiffening ribs.
5. The self-resetting zero-stiffness shape memory alloy seismic isolator of claim 4, wherein: the lower support, the lower sliding block and the support plate are tightly attached, so that the shock insulation period formed by the lower support and the lower sliding block approaches infinity; the shape memory alloy rubber horizontal shock insulation ring provides quasi-zero shock insulation rigidity and restoring force in the horizontal direction.
6. The self-resetting zero-stiffness shape memory alloy seismic isolator of claim 5, wherein: the contact surface between the lower support and the lower sliding block, the contact surface between the lower sliding block and the upper sliding block, and the contact surface between the upper sliding block and the upper support are all coated with polytetrafluoroethylene coatings.
7. The self-resetting zero-stiffness shape memory alloy seismic isolator of claim 6, wherein: and the friction coefficient among the lower support, the lower sliding block, the upper sliding block and the upper support is 0.03-0.05.
8. The self-resetting zero-stiffness shape memory alloy seismic isolator of claim 7, wherein: the shape memory alloy rubber horizontal shock insulation ring eliminates residual deformation of the shock isolator caused by an overlarge load effect through a temperature rise measure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110597423.6A CN113250339A (en) | 2021-05-31 | 2021-05-31 | Self-resetting zero-rigidity shape memory alloy shock isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110597423.6A CN113250339A (en) | 2021-05-31 | 2021-05-31 | Self-resetting zero-rigidity shape memory alloy shock isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113250339A true CN113250339A (en) | 2021-08-13 |
Family
ID=77185352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110597423.6A Pending CN113250339A (en) | 2021-05-31 | 2021-05-31 | Self-resetting zero-rigidity shape memory alloy shock isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113250339A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203782881U (en) * | 2014-04-18 | 2014-08-20 | 北京建筑大学 | Shock insulation support |
| CN108086511A (en) * | 2017-12-20 | 2018-05-29 | 哈尔滨工业大学 | A kind of variation rigidity three-dimensional shock isolation support |
| WO2019024552A1 (en) * | 2017-08-04 | 2019-02-07 | 东南大学 | Self-resetting, friction pendulum three-dimensional seismic damping and isolation bearing |
| CN208762863U (en) * | 2018-04-28 | 2019-04-19 | 中国建筑股份有限公司 | A kind of panel metal rubber support |
| CN113322782A (en) * | 2021-05-31 | 2021-08-31 | 哈尔滨工业大学 | Welding-free shape memory alloy double-tube shearing energy dissipation device filled with rubber |
-
2021
- 2021-05-31 CN CN202110597423.6A patent/CN113250339A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203782881U (en) * | 2014-04-18 | 2014-08-20 | 北京建筑大学 | Shock insulation support |
| WO2019024552A1 (en) * | 2017-08-04 | 2019-02-07 | 东南大学 | Self-resetting, friction pendulum three-dimensional seismic damping and isolation bearing |
| CN108086511A (en) * | 2017-12-20 | 2018-05-29 | 哈尔滨工业大学 | A kind of variation rigidity three-dimensional shock isolation support |
| CN208762863U (en) * | 2018-04-28 | 2019-04-19 | 中国建筑股份有限公司 | A kind of panel metal rubber support |
| CN113322782A (en) * | 2021-05-31 | 2021-08-31 | 哈尔滨工业大学 | Welding-free shape memory alloy double-tube shearing energy dissipation device filled with rubber |
Non-Patent Citations (2)
| Title |
|---|
| 李素超等: "形状记忆合金橡胶对高架桥梁碰撞减震效果的试验研究", 《防灾减灾工程学报》 * |
| 李素超等: "形状记忆合金橡胶层状力学模型研究", 《建筑结构学报》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102635176B (en) | Shearing and bending combined type staged yield mild steel damper | |
| CN108086511B (en) | A kind of variation rigidity three-dimensional shock isolation support | |
| CN112411762B (en) | Rubber shock absorption and isolation system for high-rise building | |
| CN110792030B (en) | Bridge damper based on metal rubber and working method thereof | |
| CN113958014A (en) | Self-adaptive variable-rigidity three-dimensional shock isolation/vibration device | |
| CN104452975B (en) | A kind of vertical earthquake isolating bearing and preparation method thereof | |
| CN113250339A (en) | Self-resetting zero-rigidity shape memory alloy shock isolator | |
| CN108999308B (en) | Sliding shock absorber of grading shock absorber | |
| CN109235245B (en) | Self-resetting lead core rubber shock insulation support | |
| CN105545057B (en) | Frictional slip pendulum shock isolating pedestal with anti-lift-off function | |
| CN201416607Y (en) | Honeycomb shape memory alloy multi-dimensional vibration absorber | |
| CN217580661U (en) | Three-dimensional shock insulation support | |
| CN215564857U (en) | Three-dimensional friction pendulum isolation bearing | |
| CN205077621U (en) | Compound slide support of electromagnetic damping | |
| CN114790785B (en) | Large-bearing-capacity high-energy-consumption three-dimensional shock insulation support suitable for building structure | |
| CN107327194B (en) | Supporting type negative-stiffness friction damper | |
| CN214007877U (en) | Magneto-rheological buffer with series-parallel structure | |
| CN104196144A (en) | Separating sliding anti-tension device for isolation bearing | |
| CN201649113U (en) | Spring for changing structural anti-seismic damping ratio | |
| KR100767344B1 (en) | Structure of rubber bearing arrangement for isolating seismic tremor in bridge and rubber bearing therefor | |
| CN111101650A (en) | High-strength bolt connection arc-shaped end plate sliding friction energy dissipation column base joint | |
| JP2018096500A (en) | Support device and support system | |
| CN213329435U (en) | Rigid sliding plate support and shock insulation support system constructed by same | |
| CN220058325U (en) | Multi-sliding pair anti-pulling elastic sliding plate support assembly and building | |
| CN113404166B (en) | Three-dimensional shock insulation support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210813 |