CN114000602A - Initial rigidity adjustable assembled composite damping self-resetting support - Google Patents
Initial rigidity adjustable assembled composite damping self-resetting support Download PDFInfo
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- CN114000602A CN114000602A CN202111239116.7A CN202111239116A CN114000602A CN 114000602 A CN114000602 A CN 114000602A CN 202111239116 A CN202111239116 A CN 202111239116A CN 114000602 A CN114000602 A CN 114000602A
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- energy consumption
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- disc spring
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- 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
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- 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
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- 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
- E04H9/0215—Bearing, supporting or connecting constructions specially adapted for such buildings involving active or passive dynamic mass damping systems
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- 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
- E04H9/022—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising laminated structures of alternating elastomeric and rigid layers
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- 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
- E04H9/0237—Structural braces with damping devices
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- Emergency Management (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Dampers (AREA)
Abstract
The invention relates to an assembled composite damping self-resetting support with adjustable initial rigidity, which comprises: the device comprises an outer pipe system, an energy consumption device, a reset device and a rigidity control device; the energy consumption device is connected with the reset device and then is arranged on the left side inside the outer pipe system, and the rigidity control device is arranged on the left side inside the outer pipe system; the disc spring with stable performance is adopted to realize resetting, friction and viscoelastic materials are adopted to consume energy, the problem that the existing displacement sensitive type self-resetting support is poor in structural acceleration response control is solved, and the initial rigidity of the support can not be influenced by the limit bearing capacity through a special structure. Meanwhile, the invention is composed of all sub-assembly bodies, can process and assemble all sub-assembly bodies at the same time, and then convey to the construction site for integral assembly, and has the advantages of high efficiency and convenience in actual production. After the earthquake, the failed parts can be replaced according to the actual damage condition, so that the repair cost is saved, the repair time is shortened, and the function recovery is realized.
Description
Technical Field
The invention relates to the technical field of shock absorption and energy consumption of building structures, in particular to an assembly type composite damping self-resetting support with adjustable initial rigidity, which comprises a disc spring, displacement and speed sensitive type damping and an adjustable initial rigidity self-resetting steel support.
Background
As an important index for evaluating the earthquake resistance toughness of the building structure, the size of the residual deformation directly influences the post-earthquake safety performance evaluation and repair cost of the structure. Although the common supports and buckling restrained braces commonly used at present can effectively reduce structural vibration and improve anti-seismic performance, the structure is easy to generate non-negligible residual deformation after earthquake due to the characteristic of plastic energy consumption. To solve this problem, domestic and foreign scholars have developed various types of self-restoring supports to reduce the residual deformation of the structure. Generally, a self-resetting support mainly comprises a resetting device, an energy consumption device and a force transmission element.
The existing resetting device for self-resetting support usually adopts prestressed tendons[1,2]Shape memory alloy[3 , 4]And a disc spring[5]To effect a reset. The belleville springs in different combination forms can present different characteristic curves, and have high bearing capacity while ensuring larger deformation capacity, so that the belleville springs are widely applied. The most used energy consumption device of the existing self-resetting support is friction[5]Metal yield[4]And the damping device can be generally called displacement sensitive type damping and can provide stable damping force through deformation in a support activation state. No matter what material is adopted to realize resetting or energy consumption, the self-resetting support can effectively control the residual displacement angle of the structure, and the post-earthquake repairing work is facilitated.
Self-reset support realizing reset by disc spring and energy consumption by friction[5]Is the most similar implementation scheme of the invention. This scheme comprises inner tube and outer tube, and wherein friction device has been arranged to the inner tube interlude, and the inner tube both ends distribute has two pre-compaction dish spring groups. The outer tube is equipped with the dog respectively at inner tube interlude and both ends for when the mutual dislocation takes place for the inner and outer pipe, the mutual displacement of friction device accessible carries out the power consumption, thereby two dish spring groups can be further compressed and provide the restoring force.
Similarly, the energy consumption and the reset are realized by mutual dislocation of the inner pipe and the outer pipe. However, the prior art has the following disadvantages:
although providing a stable damping force, the self-resetting brace using displacement sensitive damping provides a greater response to structural floor acceleration than a buckling restrained brace having the same level of bearing capacity, which is detrimental to the resistance of non-structural members in the structure to seismic loads. Research shows that speed-sensitive damping such as viscous damping and viscoelastic damping can effectively reduce the acceleration response of the structure, but generally speaking, the speed-sensitive damping needs to achieve the same level of damping force as displacement-sensitive damping, and the required cost is higher.
In addition, the initial stiffness of existing self-resetting braces increases with increasing ultimate bearing capacity requirements. The high bearing capacity of the self-resetting support is pursued, so that the initial rigidity is often overlarge, the input of the seismic energy of the structure is increased, and the energy consumption burden of the structure is increased.
After the existing self-resetting support is machined, the performances of pre-pressure, energy consumption capacity, bearing capacity, initial rigidity, activated rigidity and the like of a component are not easy to change or only a part of the performances is changed, and a treatment measure when the performance requirement of a building structure is changed due to secondary design is not systematically considered.
In order to achieve the functions of energy consumption and resetting of the existing self-resetting support, parts which are special in shape and contain welding processes are frequently used, so that the components have initial defects and complex welding stress. These initial defects and weld stresses can cause the component to fail when subjected to dynamic loading without reaching the ultimate load capacity.
The existing self-resetting support usually adopts prestressed tendons and shape memory alloy to realize resetting. The shape memory alloy has stable resetting capability and certain energy consumption capability, but is expensive, so that the cost of the self-resetting support is greatly increased. Although the prestressed tendon has lower cost, the deformation allowance of the prestressed tendon after being prestressed is smaller, and the deformation capability of the corresponding self-resetting support is poorer. After the prestressed tendons are disconnected due to failure, the resetting capability of the self-resetting support is suddenly reduced and cannot be recovered.
The existing self-resetting support is mostly inserted and welded in the assembling process, processes such as pre-pressing are applied, all parts can be installed one by one according to the sequence, time consumption is long, and machining and assembling efficiency is low. If the self-resetting support is assembled in a factory, a huge component can be transported to a construction site only after the assembly is completed, so that the transportation convenience is reduced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide an assembled composite damping self-resetting support with adjustable initial rigidity. The self-resetting support realizes resetting by adopting the disc spring with stable performance, consumes energy by adopting friction and a viscoelastic material, not only solves the problem that the existing displacement sensitive self-resetting support has poor response control on the acceleration of the structure, but also can ensure that the initial rigidity of the support is not influenced by the limit bearing capacity through a special structure. Meanwhile, the invention is composed of all sub-assembly bodies, can process and assemble all sub-assembly bodies at the same time, and then convey to the construction site for integral assembly, and has the advantages of high efficiency and convenience in actual production. After the earthquake, the failed parts can be replaced according to the actual damage condition, so that the repair cost is saved, the repair time is shortened, and the function recovery is realized. The components are connected by adopting mechanical connection and bolts in the installation process, so that the adverse effect caused by a welding process is greatly reduced. When the structure is designed for the second time, the design parameters of the self-resetting support need to be changed, parameters such as disc spring configuration, disc spring prepressing, bolt pretightening force, viscoelastic material shearing area and the like only need to be changed according to requirements under the condition that the stress of each force transmission element is reliable, and the less the changed parameters are, the less the sub-assembly bodies need to be changed, the more economic.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
an assembled composite damping self-resetting support with adjustable initial rigidity comprises: the device comprises an outer pipe system 1, an energy consumption device 2, a reset device 3 and a rigidity control device 4;
the energy consumption device 2 is connected with the reset device 3 and then is arranged on the left side inside the outer pipe system 1, and the rigidity control device 4 is arranged on the right side inside the outer pipe system 1;
the outer tube system 1 comprises: the device comprises an outer pipe middle section 1-1, two middle connecting pieces 1-2, two end sections 1-4, two end connecting pieces 1-5, four anti-rotation stop blocks 1-6 and a stiffness control stop pipe 1-7 which are coaxially arranged;
the two middle connecting pieces 1-2 connect the two end sections 1-4 to the two sides of the middle section 1-1 of the outer tube; the two end connecting pieces 1-5 are screwed into the two end sections 1-4 in a threaded connection mode and fixed through the anti-rotation stop blocks 1-6; the steel control baffle pipes 1-7 are arranged in the end sections 1-4 and outside the middle connecting piece 1-2;
the energy consumption device 2 comprises an energy consumption guide pipe 2-1, two force transmission plates 2-2, two energy consumption limiting plates 2-3, two friction dampers 2-4 and two viscoelastic dampers 2-5;
a groove is arranged in the middle of the bottoms of the friction damper 2-4 and the viscoelastic damper 2-5, the two friction dampers 2-4 are opposite, the two viscoelastic dampers 2-5 are opposite and fixed on a bulge in the middle of the energy consumption guide pipe 2-1 along the periphery, two ends of the two friction dampers 2-4 and two ends of the two viscoelastic dampers 2-5 are respectively connected with two force transmission plates 2-2 which are coaxial with the energy consumption guide pipe 2-1 through bolts, and the outer sides of the two force transmission plates 2-2 are respectively connected with the energy consumption limiting plates 2-3 through threads;
the energy consumption limiting plates 2-3 are used for limiting the whole energy consumption device 2 to the middle section 1-1 of the outer pipe;
the resetting device 3 comprises: a reset guide pipe 3-1, a first middle limiting part 3-2, two first disc spring baffles 3-3, a reset disc spring group 3-4 and a first end connecting part 3-5 which are coaxially arranged;
the inner surface of the right end of the reset conduit 3-1 is provided with threads for connecting with the energy consumption conduit 2-1, and the outer surface of the left end of the reset conduit 3-1 is provided with threads for connecting with the first end connecting piece 3-5;
one end of the first end connecting piece 3-5 is connected with the reset conduit 3-1, and the other end is connected with the building structure in a bolt connection mode.
The first middle limiting part 3-2 is fixed on the reset guide pipe 3-1 through a groove and fixed through a bolt, the reset disc spring group 3-4 is sleeved on the reset guide pipe 3-1, the two first disc spring baffles 3-3 are arranged at two ends of the reset disc spring group 3-4, and pre-pressure is applied to limit the two first disc spring baffles 3-3 between the first end connecting part 3-5 and the first middle limiting part 3-2.
The resetting device 3 is mounted on the left-hand end sections 1-4 of the outer pipe system 1 and is connected to the energy consuming device 2, providing a considerable restoring force.
The rigidity control device 4 comprises: a steel control guide pipe 4-1, a second middle position limiting part 4-2, two second disc spring baffle plates 4-3, a steel control disc spring group 4-4 and a second end connecting piece 4-5 which are coaxially arranged.
The second middle limiting part 4-2 is fixed on the steel control guide pipe 4-1 through a groove and is fixed through a bolt, the steel control disc spring group 4-4 is sleeved on the steel control guide pipe 4-1, the two second disc spring baffles 4-3 are arranged at two ends of the steel control disc spring group 4-4, and pre-pressure is applied to limit the two second disc spring baffles 4-3 between the second end connecting part 4-5 and the second middle limiting part 4-2;
the steel control device 4 is different from the reset device 3 in that: the pre-pressure can be selected to be applied slightly or not, and generally, the rigidity of the rigidity control device 4 is far larger than that of the reset device 3, so the usage amount of the disc spring is small.
The rigidity control device 4 is arranged at the end section 1-4 of the outer pipe at the right side through rigidity control baffle pipes 1-7 of the outer pipe system 1. One end of the steel control device 4 is only in contact with the outer pipe system 1 and the second end connector 4-5 at the other end is connected to the building structure by means of a bolt connection.
On the basis of the scheme, a plurality of stop blocks are arranged on the inner edges of two ends of the middle section 1-1 of the outer pipe, a plurality of stop blocks are arranged on the inner edges of one ends, connected with the middle section 1-1 of the outer pipe, of the two end sections 1-4, a plurality of stop blocks are arranged on the outer edges of two ends of the middle connecting piece 1-2, and the middle connecting piece 1-2 connects the two end sections to two sides of the middle section of the outer pipe through the embedding between the stop blocks.
On the basis of the scheme, the middle connecting piece 1-2 is provided with anti-rotation bolt holes 1-3, anti-rotation grooves are formed in the middle section 1-1 and the end section 1-4 of the outer pipe, which are opposite to the anti-rotation bolt holes 1-3, bolts are screwed into the anti-rotation bolt holes 1-3 and are simultaneously embedded into the anti-rotation grooves of the middle section 1-1 and the end section 1-4 of the outer pipe, the anti-rotation bolt holes 1-3 are matched with the anti-rotation grooves, and the outer pipe middle section 1-1 and the two end sections 1-4 are prevented from rotating mutually in the using process through the bolts.
On the basis of the scheme, a plurality of grooves are formed in the outer side edges of the end sections 1-4, the upper edges and the lower edges of the outer side edges of the two end connectors 1-5 are respectively provided with one groove, one part of the anti-rotation stop block 1-6 is embedded into the groove formed in the end connector 1-5, the other part of the anti-rotation stop block is embedded into the groove formed in the outer side edge of the end section 1-4, and the anti-rotation stop block 1-6 is provided with a bolt hole for fixing the anti-rotation stop block 1-6 through a bolt so as to prevent the self-resetting support from loosening threads in the using process.
On the basis of the scheme, the length of the stiffness control catheter 4-1 is shorter than that of the reset catheter 3-1
On the basis of the above scheme, the friction damper 2-4 comprises: the friction plate comprises a plurality of high-strength bolts 2-4a, an upper friction clamping plate 2-4b, a plurality of friction plates 2-4c, a friction core plate 2-4d and a lower friction clamping plate 2-4 e;
the upper friction clamping plate 2-4b is a rectangular plate, a plurality of bolt holes 2-4f are formed in the long edge of the rectangular plate, the lower friction clamping plate 2-4e is a rectangular plate, a wide groove is formed in the long edge direction of the rectangular plate, a plurality of bolt holes 2-4f are formed in the same position of the upper friction clamping plate 2-4b, and grooves are formed in the upper surface and the lower surface of the friction core plate 2-4d respectively and used for enabling the friction plates 2-4c to be embedded into the grooves in an adhesion mode; the upper friction clamping plates 2-4b and the lower friction clamping plates 2-4e clamp the friction core plates 2-4d through the high-strength bolts 2-4a, and friction force is generated through relative movement of the friction core plates 2-4d, the upper friction clamping plates 2-4b and the lower friction clamping plates 2-4 e.
On the basis of the scheme, the length and the width of the lower friction clamping plate 2-4e are the same as those of the upper friction clamping plate 2-4b, the middle part of the bottom of the lower friction clamping plate 2-4e is provided with a groove for embedding a bulge of the energy consumption guide pipe 2-1, and two ends of the friction core plate 2-4d are connected with the force transmission plate 2-2;
on the basis of the scheme, the friction plates 2-4c are made of materials including: asbestos-free organics, brass, rubber-based, paper-based, resin-based, carbon fiber, and semi-metals.
On the basis of the scheme, the viscoelastic damping is 2-5: comprises an upper viscoelastic splint 2-5a, two blocks of viscoelastic material 2-5c and a lower viscoelastic splint 2-5 d;
the upper viscoelastic clamping plate 2-5a is a rectangular plate with a groove at the bottom, the upper part of the lower viscoelastic clamping plate 2-5d is provided with a groove along the long edge direction, the two rectangular viscoelastic material blocks 2-5c are arranged in the grooves of the lower viscoelastic clamping plate 2-5d and are adhered to the upper viscoelastic clamping plate 2-5a and the lower viscoelastic clamping plate 2-5d through a vulcanization process, and when the upper viscoelastic clamping plate 2-5a and the lower viscoelastic clamping plate 2-5d move relatively, the viscoelastic material blocks 2-5c can provide elastic restoring force and viscous damping force.
On the basis of the scheme, the middle of the bottom of the lower viscoelastic clamping plate 2-5d is provided with a groove for embedding the energy consumption guide pipe 2-1, and two ends of the upper viscoelastic clamping plate 2-5a are provided with round holes for connecting with the force transmission plate 2-2.
As a preferred embodiment of the present invention, the outer pipe system 1 is not limited to a round pipe, but may be in the form of a square pipe, a composite plate, or the like.
As a preferred option of the scheme, the composite damper provided by the invention is formed by combining displacement sensitive damper and speed sensitive damper, wherein the displacement sensitive damper is a friction damper 2-4 in the application, and the friction damper 2-4 can be replaced by displacement sensitive damper in other forms such as a metal yielding damper; the speed sensitive type damping is the viscoelastic damper 2-5 in the application, and the viscoelastic damper 2-5 can be replaced by other speed sensitive type damping such as a liquid viscous damper.
Compared with the prior art, the invention has the beneficial effects that:
1. the assembly type composite damping self-resetting support with adjustable initial rigidity mainly adopts mechanical connection and bolt connection, is assisted by a small amount of welding processes, greatly reduces the initial stress defect of the support body caused by welding, and improves the stability of a component under the action of dynamic load.
2. The invention adopts a plurality of sub-assemblies to be respectively processed and assembled and finally combined into the supporting assembly. The method is beneficial to batch processing and convenient to transport, and can greatly improve the production efficiency. In the post-earthquake repairing process, the repairing cost can be reduced by replacing only parts with serious damage, the repairing time is shortened, and the building structure function can be restored.
3. The invention adopts the pre-pressed disc spring to realize the reset, and configures a member with the stroke and the rigidity meeting the design requirement after activation through the involution and the superposition of the disc spring. The combined disc spring enters a pressure and stage with the rigidity rising sharply after reaching the travel limit, and can still reset after being unloaded, and can also be used again. Different from the characteristic that the prestressed tendons are disconnected and fail after reaching the limit state, the adoption of the pre-pressed disc spring is more stable and safer.
4. The invention adopts a friction and viscoelastic damping composite energy consumption form, and the friction and viscoelastic damping both participate in energy consumption together to avoid the defect of single energy consumption. Frictional damping can provide stable energy consumption capability after the component is activated, but the control effect on the acceleration response of the component is poor; viscoelastic damping can effectively reduce the acceleration response of the structure, but provides less damping force. By adjusting the energy consumption size and proportion of the friction damping and the viscoelastic damping, the self-resetting support not only can provide stable and sufficient energy consumption, but also can reduce the acceleration response of the structure.
5. According to the invention, through the rigidity control device, the independence of the initial rigidity and the bearing capacity of the self-resetting support is realized. Since the self-resetting support usually has high bearing capacity, the initial rigidity is larger, and the ultimate bearing capacity of the component is reduced by reducing the section of the force transmission part to reduce the initial rigidity, so that the design and the use of the component are facilitated by making the two parts irrelevant.
6. The invention realizes that the initial rigidity, the rigidity after activation, the activation force and the limit stroke bearing capacity of the component are easy to adjust. When the performance requirement of the support is changed due to the secondary design of the building structure containing the invention and the current support performance needs to be changed, the pre-pressure, the energy consumption capability, the bearing capability, the initial rigidity and the rigidity after activation can be adjusted within a certain limit by only ensuring the reliability among all the force transmission units. Particularly, the initial stiffness of the self-resetting support directly influences the self-vibration period of the structure in an elastic state, and the change of the initial stiffness has important significance for controlling the structure in various vibration modes, such as earthquake load, wind load, environmental vibration and the like.
The technical problems that the invention can solve are mainly as follows:
1. the welding connection usage is reduced to a large extent in the machining process, the influence of initial defects and welding stress is reduced, and the performance of the component under dynamic load is more stable.
2. The member is assembled from three sub-assemblies. The sub-assembly bodies can be simultaneously processed and transported to a construction site for integral assembly, and the production efficiency is greatly improved.
3. The pre-pressing disc spring is adopted for resetting, so that the component still has resetting capability when the compression amount reaches the limit.
4. The displacement and the speed sensitive damping are combined for use, so that the member has sufficient energy consumption capability, and the acceleration response of the structure can be effectively reduced.
5. The initial rigidity value of the component is not related to the ultimate bearing capacity by using the rigidity control device.
6. The initial rigidity, the rigidity after activation, the magnitude of the activation force and the limit stroke bearing force of the component can be adjusted by changing parameters such as disc spring configuration, disc spring prepressing, bolt pretightening force, viscoelastic material shearing area and the like under the condition of ensuring reliable force transmission.
Drawings
FIG. 1 is a schematic diagram of an outer pipe system of an assembled composite damping self-resetting support with adjustable initial rigidity.
Fig. 2 is a schematic diagram of an energy consumption device of an assembled composite damping self-resetting support with adjustable initial rigidity.
FIG. 3 is a schematic view of a friction damper with adjustable initial stiffness for an assembled composite damping self-resetting support.
FIG. 4 is a schematic diagram of an assembled composite damping self-resetting supported friction damper assembly with adjustable initial stiffness.
FIG. 5 is a schematic view of a viscoelastic damper with adjustable initial stiffness for a fabricated composite damping self-resetting support.
FIG. 6 is a schematic diagram of an assembled composite damping self-resetting support viscoelastic damper assembly with adjustable initial stiffness.
Fig. 7 is a schematic view of a resetting device of an assembled composite damping self-resetting support with adjustable initial rigidity.
FIG. 8 is a schematic diagram of a rigidity control device of an assembled composite damping self-resetting support with adjustable initial rigidity.
FIG. 9 is an overall schematic view of an assembled composite damping self-resetting support with adjustable initial stiffness.
Description of reference numerals:
1 — an outer tube system; 1-middle section of outer tube; 1-2-middle connection; 1-3-anti-rotation bolt holes; 1-4-end section; 1-5-end connectors; 1-6-anti-rotation stop; 1-7-control rigid blocking pipe; 2-energy consuming devices; 2-1-energy consumption conduit; 2-force transmission plate; 2-3-energy consumption limiting plate; 2-4-a friction damper; 2-4 a-high strength bolt; 2-4 b-upper friction splint; 2-4 c-friction plate; 2-4 d-friction core plate; 2-4 e-lower friction splint; 2-4 f-bolt hole; 2-5-viscoelastic damper; 2-5 a-upper viscoelastic splint; 2-5 b-standard round holes; 2-5 c-a block of viscoelastic material; 2-5 d-lower viscoelastic splint; 3-a resetting device; 3-1-a reduction catheter; 3-2-a first middle stop; 3-a first disc spring baffle; 3-4-reset disc spring group; 3-5-a first end connector; 4-a rigidity control device; 4-1-a stiffness-controlling catheter; 4-2 — a second middle stop; 4-3-a second disc spring baffle; 4-control the disc spring group of the steel; 4-5-second end connection.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings 1 to 9.
The invention mainly comprises an outer pipe system 1, an energy consumption device 2, a reset device 3 and a rigidity control device 4.
The energy consumption device 2, the reset device 3 and the rigidity control device 4 can be processed and assembled at the same time and then integrated with the outer pipe system 1 into a supporting whole. The following will describe in detail the embodiments of the present invention in terms of the order of processing and assembly.
As shown in fig. 2 to 6, the energy consumption device 2 needs to assemble two friction dampers 2-4 and two viscoelastic dampers 2-5 before assembly. In the assembling process of the friction damper 2-4, the friction plates 2-4c need to be firstly adhered to the friction core plate 2-4d, then the friction core plate 2-4d is placed between the upper friction clamping plate 2-4b and the lower friction clamping plate 2-4e, in the process, the relative positions of the three plates need to be aligned, and then the high-strength bolts 2-4a penetrate through the round holes of the upper friction clamping plate 2-4b and are fixed in the bolt holes of the lower friction clamping plate 2-4e, so that the friction core plate 2-4d is clamped.
When the viscoelastic damper 2-5 is assembled, the upper viscoelastic clamping plate 2-5a, the viscoelastic material block 2-5c and the lower viscoelastic clamping plate 2-5d are aligned according to the relative positions shown in fig. 6 and are adhered by a standard vulcanization process.
The assembly of the energy consuming device 2 may be performed after the assembly of the two friction dampers 2-4 and the two viscoelastic dampers 2-5. Two force transfer plates 2-2 with cross sections of inner circles and outer circles penetrate through two ends of an energy consumption guide pipe 2-1, grooves in the middle of the bottom surfaces of lower friction clamping plates 2-4e of two friction dampers 2-4 and grooves in the middle of the bottom surfaces of lower viscoelastic clamping plates 2-5d of two viscoelastic dampers 2-5 are embedded into stop blocks around the middle of the energy consumption guide pipe 2-1, and meanwhile, two ends of a friction core plate 2-4d of the friction damper 2-4 and two ends of an upper viscoelastic clamping plate 2-5a of the viscoelastic damper 2-5 are fixed to four outer edges of the two force transfer plates 2-2 in a bolt connection mode respectively. At this point, the energy consuming device 2 is substantially assembled.
As shown in fig. 7, the resetting device 3 needs to apply a pre-stress to the disc spring assembly during the assembly process. The first middle limiting piece 3-2 is firstly embedded into a groove in the pipe wall of the reset guide pipe 3-1 and fixed through bolts, the reset guide pipe 3-1 is vertically placed, and the position of the first middle limiting piece 3-2 close to the bottom end is ensured. Two first disc spring baffles 3-3 are respectively arranged at two ends of the reset disc spring group 3-4 and penetrate into the tube, so that one first disc spring baffle 3-3 is completely contacted with the first middle limiting part 3-2. And vertically and downwards applying pre-pressure to the other first disc spring baffle 3-3, and when the pre-pressure value meets the design requirement, screwing the first end part connecting piece 3-5 into the top end of the reset guide pipe 3-1 through a thread structure and enabling the first end part connecting piece to just contact the adjacent first disc spring baffle 3-3, thus finishing the assembly process of the reset device.
As shown in fig. 8, the steel control device 4 is assembled in a similar manner to the reset device 3, except that no pre-compression or only a small amount of pre-compression is required. The steel control guide pipe 4-1, the second middle limiting part 4-2, the second disc spring baffle 4-3 and the steel control disc spring group 4-4 can be installed according to the relative position of the figure 8, and when the second end connecting part 4-5 is screwed in, the steel control guide pipe is not easy to loosen.
After the assembly of the energy consumption device 2, the reset device 3 and the steel control device 4 is completed, the energy consumption device and the steel control device can be integrated with the outer pipe system 1 to complete the assembly of the support assembly. According to the assembly sequence of the middle part and the two sides, firstly, one energy consumption limiting plate 2-3 of the energy consumption device 2 is screwed into one force transmission plate 2-2 in a threaded structure mode, then the existing part of the energy consumption device 2 penetrates into the middle section 1-1 of the outer pipe system 1, and meanwhile, the other energy consumption limiting plate 2-3 is connected to the other force transmission plate 2-2 in a threaded structure mode, so that the energy consumption device is limited to the middle section 1-1 of the outer pipe system 1.
Two middle connecting pieces 1-2 of the outer pipe system 1 are respectively connected to two ends of the middle section 1-1 of the outer pipe in a rotating embedded mode, then two end sections 1-4 are connected to the middle connecting pieces 1-2 in a rotating embedded mode, the two end sections are adjusted to be completely embedded, and bolts are screwed into anti-rotation bolt holes 1-3. Screwing one end of the resetting device 3 without the first end connecting piece 3-5 into the end part of the energy consumption guide pipe 2-1 of the energy consumption device 2 in a threaded connection mode, simultaneously enabling a first disc spring baffle 3-3 of the resetting system 3 close to the middle connecting piece 1-2 to just abut against the middle connecting piece 1-2, screwing the end part into the end connecting piece 1-5 of the outer pipe system 1, simultaneously embedding the anti-rotation stop block 1-6 into grooves of the end connecting piece 1-5 and the end section 1-4, and fixing the anti-rotation stop block 1-6 through a bolt.
And placing the steel control blocking pipe 1-7 of the outer pipe system 1 into the other end section 1-4 and enabling the steel control blocking pipe to abut against the middle connecting piece 1-2, placing the steel control device 4 and enabling the steel control blocking pipe 1-7 to abut against the adjacent second disc spring baffle 4-3, and installing the end connecting piece 1-5 and the anti-rotation baffle 1-6 by adopting the same method as that for installing the resetting device 3.
To this end, the support is already assembled, and fig. 9 is a schematic diagram of the assembled support, and in order to clearly see the internal structure, the outer tube system 1 is shown by cutting a part away, and the schematic diagram of the outer tube system in fig. 1 is the same.
The working principle of the fabricated composite damping self-resetting support with adjustable initial rigidity is illustrated by fig. 9:
in the use stage, the first end connector 3-5 and the second end connector 4-5 of the support are connected to the building structure, and are pulled when moving away from each other and pressed when moving towards each other, for convenience of description, the end of the steel control device 4 is fixed by default, and the end of the reset device 3 moves.
When the support is pulled, both the reset conduit 3-1 of the reset device 3 and the energy consuming conduit 2-1 of the energy consuming device 2 move to the left. The first middle limiting part 3-2 of the resetting device 3 extrudes the corresponding first disc spring baffle 3-3 leftwards, so that the first disc spring baffle 3-3 close to the supporting end part of the resetting device 3 extrudes the end part connecting piece 1-5 of the corresponding outer pipe system 1 leftwards, and the load of the resetting device is transmitted to the outer pipe system 1. Meanwhile, the energy consumption guide pipe 2-1 of the energy consumption device 2 drives the upper friction clamping plate 2-4b of the friction damper 2-4, the lower friction clamping plate 2-4e and the lower viscoelastic clamping plate 2-5d of the viscoelastic damper 2-5 to move leftwards through the middle bulge, and the friction core plate 2-4d and the upper viscoelastic clamping plate 2-5a are limited at the middle section 1-1 of the outer pipe so that the friction core plate and the upper viscoelastic clamping plate can move mutually to generate damping force and are respectively transmitted to the end parts of the outer pipe system 1 and the resetting device 3.
Meanwhile, both the resetting force and the damping force are transmitted to the steel control device 4 by the outer pipe system 1, the outer pipe system 1 integrally moves leftwards, so that the end part connecting piece 1-5 of the outer pipe system 1 at the steel control device 4 extrudes the second disc spring baffle plate 4-3 at the corresponding position to move leftwards, the acting force is transmitted to the second middle limiting piece 4-2 through the disc spring, then transmitted to the steel control conduit 4-1 and finally transmitted to the second end part connecting piece 4-5.
When the support is pressed, both the reset conduit 3-1 of the reset device 3 and the energy consuming conduit 2-1 of the energy consuming device 2 move to the right. Wherein, the first end connecting piece 3-5 of the resetting device 3 rightwards extrudes the first disc spring baffle 3-3 close to the supporting end, so that the first disc spring baffle 3-3 far away from the supporting end extrudes the middle connecting piece 1-2 corresponding to the outer pipe system 1 rightwards, and the load of the resetting device is transmitted to the outer pipe system 1. Meanwhile, the energy consumption guide pipe 2-1 of the energy consumption device 2 drives the upper friction clamping plate 2-4b of the friction damper 2-4, the lower friction clamping plate 2-4e and the lower viscoelastic clamping plate 2-5d of the viscoelastic damper 2-5 to move rightwards through the middle bulge, and the friction core plate 2-4d and the upper viscoelastic clamping plate 2-5a are limited at the middle section 1-1 of the outer pipe, so that the friction core plate and the upper viscoelastic clamping plate can move mutually to generate damping force which is transmitted to the end parts of the outer pipe system 1 and the resetting device 3 respectively.
Meanwhile, both the resetting force and the damping force are transmitted to the rigid control device 4 by the outer pipe system 1, the outer pipe system 1 moves rightwards integrally, so that the rigid control baffle pipes 1-7 of the outer pipe system 1 extrude the second disc spring baffles 4-3 at the positions corresponding to the rigid control device 4 to move rightwards, and the acting force is transmitted to the second end connecting pieces 4-5 through the disc springs.
Whether the device is in tension or in compression, when the acting force of the reset device 3 is lower than the pre-pressure, the reset disc spring group 3-4 is in an inactivated state, the total support rigidity is not influenced by the reset disc spring group 3-4, but at the moment, the total support rigidity is influenced by the rigid disc spring group 4-4 due to the fact that the support and the rigid control system 4 are connected in series. The total stiffness of the support at this stage is the first stiffness.
When the action force of the reset device 3 is higher than the pre-pressure and the friction damping is in an activated state, the reset disc spring group 3-4 of the reset system 3 is activated and the rigidity is far lower than the first rigidity, the total rigidity of the support is mainly influenced by the reset disc spring group 3-4, and the rigidity at this stage is the second rigidity.
Reference documents:
[1]Christopoulos,C.,R.Tremblay,H.J.Kim,and M.Lacerte.2008."Self-centering energy dissipative bracing system for the seismic resistance of structures:development and validation."J.Struct.Eng.134(1):96-107.
https://doi.org/10.1061/(ASCE)0733-9445(2008)134:1(96).
[2]Jeffrey,E.,C.Christopoulos,and T.Robert.2014b."Design,testing,and detailed component modeling of a high-capacity self-centering energy-dissipative brace."J.Struct.Eng.141(8):04014193.
https://doi.org/10.1061/(ASCE)ST.1943-541X.0001166.
[3]Zhu,S.,and Y.Zhang.2007."Seismic behaviour of self-centring braced frame buildings with reusable hysteretic damping brace."Earthq.Eng.Struct.D.36(10):1329-1346.
https://doi.org/10.1002/eqe.683.
[4]Miller,D.J.,L.A.Fahnestock,and M.R.Eatherton.2012."Development and experimental validation of a nickel-titanium shape memory alloy self-centering buckling-restrained brace."Eng.Struct.40:288-298.https://doi.org/10.1016/j.engstruct.2012.02.037.
[5]Xu,L.H.,X.W.Fan,and Z.X.Li.2018."Hysteretic analysis model for pre-pressed spring self-centering energy dissipation braces."J.Struct.Eng.144(7):04018073.
https://doi.org/10.1061/(ASCE)ST.1943-541X.0002060.
interpretation of terms:
composite damping: the damping mode of jointly consuming energy by adopting displacement sensitive damping and speed sensitive damping is adopted.
Resetting capability: the ability of the self-resetting support to return to an initial state after deformation.
Energy consumption capacity: the ability of the self-resetting support to dissipate energy through the damper during deformation.
Initial stiffness: when the self-resetting support is deformed very little, the resetting device is not activated, and the damping device does not consume energy, the whole rigidity of the component is improved.
Stiffness after activation: after the resetting device and the damping device of the self-resetting support are activated, the integral rigidity of the component is far lower than the initial rigidity after the component is activated.
Activation force: in the loading process, when the initial rigidity is suddenly changed into the rigidity after activation, the component bears the load.
Limit stroke bearing capacity: and when the self-resetting support stroke reaches the limit, the component bears load.
Ultimate bearing capacity: the self-resetting support bears the load when damaged.
The key points and points to be protected of the invention are as follows:
1. by adopting mechanical connection and being assisted by a bolt connection method, the adverse effect brought by welding connection is reduced.
2. Resetting means, power consumption device, accuse just device respectively are sub-assembly body, but simultaneous processing installation, finally with outer tube system overall assembly, improve production efficiency, the transportation of being convenient for is convenient for restore after shaking.
3. And the prepressing disc spring is adopted to realize stable reset.
4. The combined use of displacement-sensitive and velocity-sensitive damping materials effectively reduces the acceleration response of the structure while providing stable energy consumption.
5. The initial rigidity of the component is irrelevant to the ultimate bearing capacity by adopting the rigidity control device.
6. The initial stiffness, the stiffness after activation, the activation force and the limit stroke bearing capacity can be adjusted easily by changing parameters such as disc spring configuration, disc spring prepressing, bolt pretightening force, viscoelastic material shearing area and the like.
Those not described in detail in this specification are within the skill of the art.
Claims (10)
1. An initial rigidity adjustable assembled composite damping self-resetting support is characterized by comprising: the device comprises an outer pipe system (1), an energy consumption device (2), a reset device (3) and a rigidity control device (4);
the energy consumption device (2) is connected with the reset device (3) and then is arranged on the left side of the interior of the outer pipe system (1), and the rigidity control device (4) is arranged on the right side of the interior of the outer pipe system (1);
the outer tube system (1) comprises: the device comprises an outer pipe middle section (1-1), two middle connecting pieces (1-2), two end sections (1-4), two end connecting pieces (1-5), four anti-rotation stop blocks (1-6) and a stiffness control stop pipe (1-7) which are coaxially arranged;
the two middle connecting pieces (1-2) connect the two end sections (1-4) to the two sides of the middle section (1-1) of the outer tube; the two end connecting pieces (1-5) are screwed into the two end sections (1-4) respectively in a threaded connection mode and are fixed through anti-rotation stop blocks (1-6); the steel-control baffle pipes (1-7) are arranged in the end sections (1-4) and outside the middle connecting pieces (1-2);
the energy consumption device (2) comprises an energy consumption guide pipe (2-1), two force transmission plates (2-2), two energy consumption limiting plates (2-3), two friction dampers (2-4) and two viscoelastic dampers (2-5);
a groove is formed in the middle of the bottoms of the friction dampers (2-4) and the viscoelastic dampers (2-5), the two friction dampers (2-4) are opposite, the two viscoelastic dampers (2-5) are opposite and fixed on a bulge in the middle of the energy consumption guide pipe (2-1) along the periphery, two ends of the two friction dampers (2-4) and two ends of the two viscoelastic dampers (2-5) are respectively connected with two force transmission plates (2-2) coaxial with the energy consumption guide pipe (2-1) through bolts, and the outer sides of the two force transmission plates (2-2) are respectively connected with the energy consumption limiting plates (2-3) through threads;
the energy consumption limiting plate (2-3) is used for limiting the whole energy consumption device (2) to the middle section (1-1) of the outer pipe;
the resetting device (3) comprises: the device comprises a reset guide pipe (3-1), a first middle limiting part (3-2), two first disc spring baffles (3-3), a reset disc spring group (3-4) and a first end connecting piece (3-5) which are coaxially arranged;
the inner surface of the right end of the reset conduit (3-1) is provided with threads for connecting with the energy consumption conduit (2-1), and the outer surface of the left end of the reset conduit (3-1) is provided with threads for connecting with the first end connecting piece (3-5);
one end of the first end connecting piece (3-5) is connected with the reset guide pipe (3-1), and the other end is connected with the building structure in a bolt connection mode;
the first middle limiting piece (3-2) is fixed on the reset guide pipe (3-1) through a groove and fixed through a bolt, the reset disc spring group (3-4) is sleeved on the reset guide pipe (3-1), the two first disc spring baffles (3-3) are arranged at two ends of the reset disc spring group (3-4), and pre-pressure is applied to limit the two first disc spring baffles (3-3) between the first end connecting piece (3-5) and the first middle limiting piece (3-2);
the resetting device (3) is arranged on the end section (1-4) on the left side of the outer pipe system (1) and is connected with the energy consumption device (2) to provide restoring force;
the rigidity control device (4) comprises: the rigidity control guide pipe (4-1), the second middle limiting piece (4-2), the two second disc spring baffles (4-3), the rigidity control disc spring group (4-4) and the second end connecting piece (4-5) are coaxially arranged;
the second middle limiting piece (4-2) is fixed on the steel control guide pipe (4-1) through a groove and is fixed through a bolt, the steel control disc spring group (4-4) is sleeved on the steel control guide pipe (4-1), the two second disc spring baffles (4-3) are arranged at two ends of the steel control disc spring group (4-4), and pre-pressure is applied to limit the two second disc spring baffles (4-3) between the second end connecting piece (4-5) and the second middle limiting piece (4-2);
the rigidity control device (4) is arranged at the end section (1-4) of the outer pipe at the right side through a rigidity control baffle pipe (1-7) of the outer pipe system (1); one end of the steel control device (4) is only contacted with the outer pipe system (1), and a second end connecting piece (4-5) at the other end is connected with the building structure through bolt connection.
2. The fabricated composite damping self-resetting support with adjustable initial rigidity according to claim 1, wherein a plurality of stoppers are arranged on the inner edges of two ends of the middle section (1-1) of the outer tube, a plurality of stoppers are arranged on the inner edges of one ends of the two end sections (1-4) connected with the middle section (1-1) of the outer tube, a plurality of stoppers are arranged on the outer edges of two ends of the middle connecting piece (1-2), and the middle connecting piece (1-2) connects the two end sections to two sides of the middle section of the outer tube through the tabling between the stoppers.
3. The fabricated composite damping self-resetting support with adjustable initial rigidity according to claim 2, wherein the middle connecting piece (1-2) is provided with an anti-rotation bolt hole (1-3), the middle section (1-1) and the end section (1-4) of the outer tube opposite to the anti-rotation bolt hole (1-3) are provided with anti-rotation grooves, a bolt is screwed into the anti-rotation bolt hole (1-3) and is simultaneously embedded into the anti-rotation grooves of the middle section (1-1) and the end section (1-4) of the outer tube, the anti-rotation bolt hole (1-3) is matched with the anti-rotation grooves, and the middle section (1-1) and the two end sections (1-4) of the outer tube are prevented from rotating with each other during use through the bolt.
4. The fabricated composite damping self-resetting support with adjustable initial rigidity as claimed in claim 3, wherein the outer edge of the end section (1-4) is provided with a plurality of grooves, the upper and lower edges of the outer edge of the two end connectors (1-5) are respectively provided with a groove, one part of the anti-rotation stopper (1-6) is embedded into the groove formed by the end connector (1-5), the other part of the anti-rotation stopper is embedded into the groove formed by the outer edge of the end section (1-4), and the anti-rotation stopper (1-6) is provided with bolt holes for fixing the anti-rotation stopper (1-6) through bolts so as to prevent the self-resetting support from loosening threads during use.
5. The fabricated composite damping self-resetting support with adjustable initial rigidity according to claim 1, characterized in that the length of the stiffness control guide pipe (4-1) is shorter than that of the resetting guide pipe (3-1).
6. The fabricated composite damping self-resetting support with adjustable initial stiffness of claim 1, characterized in that the friction damper (2-4) comprises: the friction plate comprises a plurality of high-strength bolts (2-4a), an upper friction clamping plate (2-4b), a plurality of friction plates (2-4c), a friction core plate (2-4d) and a lower friction clamping plate (2-4 e);
the upper friction clamping plate (2-4b) is a rectangular plate, a plurality of bolt holes (2-4f) are formed in the long edge of the rectangular plate, the lower friction clamping plate (2-4e) is a rectangular plate with a wide groove in the long edge direction, a plurality of bolt holes (2-4f) are formed in the same position of the upper friction clamping plate (2-4b), and grooves are formed in the upper surface and the lower surface of the friction core plate (2-4d) respectively and used for enabling the friction plates (2-4c) to be embedded in the grooves in an adhesion mode; the upper friction clamping plates (2-4b) and the lower friction clamping plates (2-4e) clamp the friction core plate (2-4d) through the high-strength bolts (2-4a), and friction force is generated through relative movement of the friction core plate (2-4d), the upper friction clamping plates (2-4b) and the lower friction clamping plates (2-4 e).
7. The fabricated composite damping self-resetting support with adjustable initial rigidity according to claim 6, wherein the length and width of the lower friction splint (2-4e) are the same as those of the upper friction splint (2-4b), the middle part of the bottom of the lower friction splint (2-4e) is provided with a groove for embedding the protrusion of the energy dissipation conduit (2-1), and two ends of the friction core plate (2-4d) are connected with the force transmission plate (2-2).
8. The fabricated composite damping self-resetting support with adjustable initial stiffness of claim 7, wherein the friction plates (2-4c) are made of materials comprising: asbestos-free organics, brass, rubber-based, paper-based, resin-based, carbon fiber, and semi-metals.
9. The fabricated composite damping self-resetting support with adjustable initial stiffness of claim 1, wherein the viscoelastic damping (2-5): comprises an upper viscoelastic splint (2-5a), two blocks of viscoelastic material (2-5c) and a lower viscoelastic splint (2-5 d);
the upper viscoelastic clamping plate (2-5a) is a rectangular plate with a groove at the bottom, the upper part of the lower viscoelastic clamping plate (2-5d) is provided with a groove along the long side direction, the two rectangular viscoelastic material blocks (2-5c) are arranged in the grooves of the lower viscoelastic clamping plate (2-5d) and are adhered to the upper viscoelastic clamping plate (2-5a) and the lower viscoelastic clamping plate (2-5d) through a vulcanization process, and when the upper viscoelastic clamping plate (2-5a) and the lower viscoelastic clamping plate (2-5d) move relatively, the viscoelastic material blocks (2-5c) are used for providing elastic restoring force and viscous damping force.
10. The fabricated composite damping self-resetting support with adjustable initial rigidity according to claim 9, wherein the bottom of the lower viscoelastic clamping plate (2-5d) is provided with a groove in the middle for embedding the energy consumption conduit (2-1), and the two ends of the upper viscoelastic clamping plate (2-5a) are provided with round holes for connecting with the force transmission plate (2-2).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030099413A1 (en) * | 2001-11-26 | 2003-05-29 | Lee George C. | Seismic isolation bearing |
| CN102409774A (en) * | 2011-09-02 | 2012-04-11 | 北京交通大学 | Viscoelastic damper used for buckling restrained braced building |
| CN111502056A (en) * | 2020-03-23 | 2020-08-07 | 北京交通大学 | Deformation self-recoverable assembled buckling restrained brace |
| CN112962808A (en) * | 2021-02-22 | 2021-06-15 | 中南大学 | Novel assembled mixes energy dissipation shock attenuation from restoring to throne and supports |
-
2021
- 2021-10-25 CN CN202111239116.7A patent/CN114000602B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030099413A1 (en) * | 2001-11-26 | 2003-05-29 | Lee George C. | Seismic isolation bearing |
| CN102409774A (en) * | 2011-09-02 | 2012-04-11 | 北京交通大学 | Viscoelastic damper used for buckling restrained braced building |
| CN111502056A (en) * | 2020-03-23 | 2020-08-07 | 北京交通大学 | Deformation self-recoverable assembled buckling restrained brace |
| CN112962808A (en) * | 2021-02-22 | 2021-06-15 | 中南大学 | Novel assembled mixes energy dissipation shock attenuation from restoring to throne and supports |
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