CN111962704A - Multi-order self-resetting buckling-restrained brace and energy dissipation method and application thereof - Google Patents
Multi-order self-resetting buckling-restrained brace and energy dissipation method and application thereof Download PDFInfo
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- CN111962704A CN111962704A CN202010830893.8A CN202010830893A CN111962704A CN 111962704 A CN111962704 A CN 111962704A CN 202010830893 A CN202010830893 A CN 202010830893A CN 111962704 A CN111962704 A CN 111962704A
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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
Abstract
The invention relates to a multi-stage self-resetting buckling-restrained brace, which comprises a middle positioning plate and two-stage buckling-restrained units positioned on two sides, wherein the bearing capacity of the two-stage buckling-restrained unit on one side is larger than that of the two-stage buckling-restrained unit on the other side; the second-stage buckling-restrained unit comprises a connecting node, a support core component, an outer sleeve steel pipe, a sliding bearing plate, a fixed bearing plate, a stable steel bar, a steel frame support, a belleville spring and a friction plate. The energy dissipation method comprises the steps that energy is dissipated through the friction plates and the stabilizing steel bars, and energy is dissipated through the belleville springs; self-resetting capability is provided by a belleville spring; the secondary buckling-restrained units with small bearing capacity are used as energy dissipation components in the first stage, and the secondary buckling-restrained units with large bearing capacity are used as energy dissipation components in the second stage. Also relates to application of the multi-stage self-resetting buckling restrained brace. The invention has simple structure, increases the bearing capacity of the main body structure, has self-resetting capability and a secondary damping function, is suitable for small earthquake and large earthquake, and belongs to the technical field of energy dissipation and damping structures of buildings.
Description
Technical Field
The invention relates to a building energy dissipation and shock absorption structure, in particular to a multi-order self-resetting buckling restrained brace, an energy dissipation method of the multi-order self-resetting buckling restrained brace and application of the multi-order self-resetting buckling restrained brace.
Background
With the development and modernization requirements of industrialized towns in China and the frequent recent earthquake activities, the key task of reducing the damage of buildings to lives and properties of people under the action of earthquake becomes the structural design of modern engineering.
At present, the building structure earthquake resistance generally adopts the structure damping increase and the isolation layer is arranged to dissipate the energy of the earthquake to the structure, the traditional buckling restrained brace component mainly comprises an inner core material, an outer constraint component, an unbonded expandable material and an unbonded sliding interface, and the traditional buckling restrained brace component has the functions of a common steel support and a metal energy dissipation damper. The buckling-restrained brace buckles when a strong earthquake happens, has excellent energy consumption capability and ductility, and obviously reduces the earthquake damage of the main body structure. The traditional buckling restrained brace has obvious yield deformation, and the buckling restrained brace component can provide good lateral resistance for the structure.
In fact, because the yield bearing capacity of the traditional buckling restrained brace is large, when the earthquake force is too small, the brace component cannot enter a buckling state in time, and the energy consumption capacity of the component cannot be exerted. When the earthquake force is large, the supporting member enters a buckling state, peripheral nodes connected with the member are seriously damaged, the residual deformation is large, the difficulty of repairing the main body structure after disaster is large, the cost is high, and the restoration of the reconstruction work and the production order after the disaster is not facilitated.
Therefore, the multi-stage buckling restrained brace device which can consume the seismic energy born by the engineering structure under the action of small earthquake and large earthquake and can provide corresponding self-resetting capability through the device is developed, the residual deformation of the main structure caused by the damage of the brace member can be reduced, the difficulty and the cost of post-disaster repair are reduced, and the post-disaster reconstruction and the recovery of the life order are facilitated.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to: the multistage self-resetting buckling-restrained brace can effectively dissipate seismic energy, has self-resetting capability and has a two-stage energy dissipation function, and the energy dissipation method and the application thereof are provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a multi-order self-resetting buckling-restrained brace comprises a middle positioning plate and two-stage buckling-restrained units positioned on the left side and the right side of the middle positioning plate, wherein the bearing capacity of the two-stage buckling-restrained unit on one side is larger than that of the two-stage buckling-restrained unit on the other side; the secondary buckling-restrained unit comprises a connecting node, a support core component, an outer sleeve steel pipe, a sliding bearing plate, a fixed bearing plate, a stable steel bar, a steel frame support, a belleville spring and a friction plate; the outer sleeve steel pipe is fixed with the middle positioning plate; the support core component, the sliding bearing plate and the stable steel bar are sequentially connected from outside to inside and integrally slide in the outer sleeve steel pipe; the middle part of the support core component penetrates through the outer sleeve steel pipe, and the outer end of the support core component is fixedly connected with the connecting node; the fixed bearing plate, the steel frame support and the middle positioning plate are sequentially connected from outside to inside, the fixed bearing plate and the steel frame support are positioned in the outer sleeve steel pipe, and the inner end of the stable steel bar penetrates through the fixed bearing plate; a friction plate which is contacted with the stable steel bar is arranged between the fixed bearing plate and the middle positioning plate; the compressed belleville spring is sleeved outside the stable steel bar and is positioned between the fixed bearing plate and the sliding bearing plate.
Preferably, the length of the left secondary buckling-restrained unit is greater than that of the right secondary buckling-restrained unit; the two secondary buckling-restrained units are arranged in a straight line.
Preferably, the lengths of the left side stabilizing steel bar, the steel frame support and the friction plate are all larger than the lengths of the right side stabilizing steel bar, the steel frame support and the friction plate.
Preferably, the number and/or shape and/or size of the belleville springs on one side is different from the other side.
Preferably, the support core member is a rod-shaped structure with a square or round cross section; the outer sleeved steel pipe is a square pipe; the cross sections of the fixed bearing plate, the sliding bearing plate and the middle positioning plate are square; the cross section of the stabilizing steel bar is circular.
Preferably, the number of the steel frame supports is four, and the steel frame supports are arranged around the stable steel bars in the up-down direction, the front-back direction and the back-forth direction; the quantity of friction disc is four, encircles the setting of stabilizing the rod iron in upper and lower, front and back direction, and hugs closely and stabilizes the rod iron, and the cross section of friction disc is the rectangle.
Preferably, the secondary buckling-restrained unit further comprises a limiting plate for limiting the outward sliding of the sliding bearing plate, and the limiting plate is fixed on the inner side wall of the outer sleeve steel pipe; the distance between the left limiting plate and the fixed bearing plate is the same or different from the distance between the left limiting plate and the fixed bearing plate.
Preferably, the secondary buckling-restrained unit further comprises two limiting blocks, one limiting block is fixed on the inner side of the sliding bearing plate, and the other limiting block is fixed on the outer side of the fixed bearing plate; the stopper is circular, and belleville spring's tip cup joints on the stopper, and the stopper is opened has the round hole to supply to stabilize the rod iron and pass.
An energy dissipation method of a multistage self-resetting buckling-restrained brace is characterized in that the multistage self-resetting buckling-restrained brace is adopted, energy is dissipated through the friction between a friction plate and a stable steel bar, and the energy is dissipated through the compression deformation of a belleville spring so as to improve the bearing capacity of a component; self-resetting capability is provided by a belleville spring; the two-stage buckling-restrained units on the two sides have different bearing capacities, the two-stage buckling-restrained unit with small bearing capacity is used as the energy dissipation component in the first stage, and the two-stage buckling-restrained unit with large bearing capacity is used as the energy dissipation component in the second stage.
An application of a multi-order self-resetting buckling restrained brace is to use the multi-order self-resetting buckling restrained brace in a frame structure, a steel structure, a high-rise structure or an industrial building.
The principle of the invention is as follows:
the energy of the earthquake is dissipated through the friction plates and the belleville springs, and the building structure is effectively protected. On the basis, energy consumption in two stages is realized through the difference of the bearing capacity of the two secondary buckling-restrained units on the two sides, and the requirements of small earthquake and large earthquake can be met simultaneously. The length of the secondary buckling-restrained units is different, the number and/or the shape and/or the size of the belleville springs are different, the bearing capacity can be influenced by the different lengths of the friction plates, and finally the different bearing capacities of the two sides can be met by designing elements influencing the bearing capacity.
The invention has the following advantages:
under the condition that the design of an original main body structure is ensured, the bearing capacity of the main body structure can be increased by the multi-stage self-resetting buckling-restrained brace, meanwhile, the corresponding self-resetting capacity is provided for the component by utilizing the number and the types of the butterfly springs on the left side and the right side, the length of the second-stage buckling-restrained unit on the left side is different from that on the right side, the bearing capacity of the second-stage buckling-restrained unit on the left side is not equal to that on the right side, and the bearing capacity of the second-stage buckling-restrained unit on the right side is smaller than that on the left side, so that when the component is subjected to earthquake action, the second-stage buckling-restrained; and then, with the enhancement of earthquake acting force, the secondary buckling-restrained unit on the left side enters a buckling energy dissipation state as a second-stage energy dissipation state. And simultaneously, the quantity, the size and the type of the belleville springs are designed according to the designed bearing capacity of the buckling-restrained units on the left side and the right side so as to meet the requirement of the corresponding self-resetting capacity of the component. When the member is subjected to earthquake action, the belleville springs in the member are in a compressed or stretched state to dissipate the energy input by the earthquake, play a role of supporting, protect the whole structure from being damaged, reduce the residual deformation after the earthquake, reduce the repair cost of the buildings after the earthquake, save the manpower, material resources and financial resources of the country and reduce the time for recovery after the earthquake. The multistage self-resetting buckling restrained brace has the advantages of simple structure, convenience in construction and high practical value.
The gap between the outer jacket steel tube and the support core member is not filled with any material. When the belleville spring deforms, the stable steel bar is in contact with the friction plate, and the bearing capacity of the member is improved through partial energy borne by the friction dissipation member. The belleville springs are used as main energy dissipation components, and energy borne by the support components is dissipated through deformation of the belleville springs. The multistage self-resetting buckling-restrained brace can consume seismic energy born by an engineering structure under the action of small earthquake and large earthquake, can provide corresponding self-resetting capability through a self resetting device, can reduce residual deformation of a main body structure caused by damage of a supporting member, thereby reducing difficulty and cost of post-disaster repair and being beneficial to recovery after a disaster and recovery of life order.
The rigid connection is adopted, so that the connection part can be ensured to be in a stable state.
The invention can be widely applied to frame structures, steel structures and high-rise structures, and can also be used in industrialized buildings; the problem that the traditional buckling-restrained energy dissipation support cannot return to the original point through the traditional buckling-restrained energy dissipation support under the action of an earthquake is solved.
Drawings
Fig. 1 is a structural schematic diagram of a multi-stage self-resetting buckling restrained brace.
Fig. 2 is a cross-sectional view a-a of fig. 1.
Fig. 3 is a cross-sectional view B-B of fig. 1.
Fig. 4 is a cross-sectional view of C-C in fig. 1.
Fig. 5 is a cross-sectional view D-D in fig. 1.
FIG. 6 is a working state diagram of the multi-stage self-resetting buckling-restrained brace under a small earthquake.
FIG. 7 is a working state diagram of the multi-stage self-resetting buckling-restrained brace during a major earthquake.
FIG. 8 is a diagram of the multi-step self-resetting buckling restrained brace in the working state of resetting after an earthquake.
The self-resetting device comprises a butterfly spring 1, a sliding bearing plate 2, a support core member 3, a friction plate 4, a middle positioning plate 5, a steel frame support 6, a limiting block 7, a limiting plate 8, a connecting joint 9, an outer sleeve steel pipe 10, a self-resetting device 11, a stable steel bar 12 and a fixed bearing plate 13.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
Example one
The utility model provides a multistage is from restoring to throne buckling restrained brace, includes middle part locating plate and the second grade buckling restrained unit that is located the middle part locating plate left and right sides for alleviate the beam column junction and take place to destroy under the seismic action, alleviate the damage and the residual deformation of the major structure that arouse.
The second-stage buckling-restrained unit comprises a connecting node, a support core component, an outer sleeve steel pipe, a sliding bearing plate, a fixed bearing plate, a stable steel bar, a steel frame support, a belleville spring and a friction plate. The outer sleeve steel pipe is fixed with the middle positioning plate; the support core component, the sliding bearing plate and the stable steel bar are sequentially connected from outside to inside and integrally slide in the outer sleeve steel pipe; the middle part of the support core component penetrates through the outer sleeve steel pipe, and the outer end of the support core component is fixedly connected with the connecting node; the fixed bearing plate, the steel frame support and the middle positioning plate are sequentially connected from outside to inside, the fixed bearing plate and the steel frame support are positioned in the outer sleeve steel pipe, and the inner end of the stable steel bar penetrates through the fixed bearing plate; a friction plate which is contacted with the stable steel bar is arranged between the fixed bearing plate and the middle positioning plate; the compressed belleville spring is sleeved outside the stable steel bar and is positioned between the fixed bearing plate and the sliding bearing plate.
In order to ensure the stability of the axial deformation of the belleville spring, a stable steel bar is adopted in the middle of the belleville spring for communicating, and a sufficiently wide sliding area is reserved at the rear part; the limiting blocks are arranged at the two ends of the stabilizing steel bar, so that the stabilizing steel bar is prevented from sliding laterally, the axial deformation of the belleville spring is prevented from being influenced, and the energy consumption capability of a component is reduced; meanwhile, a corresponding limiting plate is arranged according to the requirement of the bearing capacity of the component, so that the situation that the reset capacity of the belleville spring is too large and exceeds the original design size is avoided; and then the middle positioning plate and the outer sleeve steel pipe are connected by welding, so that the connection between the middle positioning plate and the outer sleeve steel pipe is reliable. Meanwhile, the position of the limiting plate can be adjusted according to the design requirement.
In this embodiment, the length of the left secondary buckling-restrained unit is different from that of the right secondary buckling-restrained unit, so that the bearing capacity of the left secondary buckling-restrained unit is not equal to that of the right secondary buckling-restrained unit, and the bearing capacity of the right secondary buckling-restrained unit is smaller than that of the left secondary buckling-restrained unit, so that when the earthquake acts, the right secondary buckling-restrained unit enters a buckling energy-consuming state first, and at the moment, the right secondary buckling-restrained unit is in a first-stage energy-dissipating state; and then, with the enhancement of earthquake acting force, the secondary buckling-restrained unit on the left side enters a buckling energy dissipation state as a second-stage energy dissipation state.
The specification size of the belleville springs on the left side and the right side directly influences the bearing capacity of the self-resetting buckling-restrained energy-dissipating support, the specifications (sectional area and sectional shape) of the belleville springs on the left side and the right side can be designed according to the actual requirements of projects, the self-resetting force on the left side and the right side can be matched with the secondary buckling-restrained units, the elasticity of the self-resetting buckling-restrained energy-dissipating support can be kept under the action of an earthquake, and the self-resetting buckling-restrained energy-dissipating support can be deformed and does not lose efficacy under the action of.
The middle positioning plate is also a key part of stress, the middle positioning plate needs to be reliably connected with the outer sleeve steel pipe when stressed, and the middle positioning plate and the outer sleeve steel pipe are guaranteed not to be broken under the action of a large shock; therefore, in actual use, the size of the positioning steel plate can be designed according to the requirement on the performance of the whole self-resetting buckling-restrained energy-dissipation brace, and the mechanical properties of the left and right self-resetting devices and the whole brace member are further ensured.
A certain gap is reserved between the stabilizing steel bar and the middle positioning plate, so that when the connecting joint is subjected to axial load, the load is completely transmitted to the internal self-resetting device through the core supporting member, the butterfly spring in the self-resetting device consumes seismic energy through continuous compression and stretching, and the damage and the participation deformation of the main body structure are reduced.
The two secondary buckling-restrained units have the same structure but different bearing capacity, and are arranged in a straight line.
The supporting core component is a rod-shaped structure with a square cross section; the outer sleeved steel pipe is a square pipe; the cross sections of the fixed bearing plate, the sliding bearing plate and the middle positioning plate are square, and the cross section of the stable steel bar is circular. The number of the steel frame supports is four, and the steel frame supports are arranged around the stabilizing steel bars in the up-down direction, the front-back direction and the back direction; the quantity of friction disc is four, encircles the setting of stabilizing the rod iron in upper and lower, front and back direction, and hugs closely and stabilizes the rod iron, and the cross section of friction disc is the rectangle. The stabilizing steel bar is in contact with the rear friction plate under the action of axial compression deformation, and a part of energy is dissipated through friction between the stabilizing steel bar and the friction plate, so that the bearing capacity of the component is improved.
The second-stage buckling-restrained unit further comprises a limiting plate for limiting the sliding bearing plate to slide outwards, and the limiting plate is fixed on the inner side wall of the outer sleeve steel pipe.
The second-stage buckling-restrained unit also comprises two limiting blocks, one limiting block is fixed on the inner side of the sliding bearing plate, and the other limiting block is fixed on the outer side of the fixed bearing plate; the stopper is circular, and belleville spring's tip cup joints on the stopper, and the stopper is opened has the circular port and supplies to stabilize the rod iron and pass.
Rigid connection, such as welding, is adopted between the support core component and the sliding bearing plate, between the fixed bearing plate and the steel frame support, and between the steel frame support and the middle positioning plate, so that the support core component is prevented from being torn under the action of axial tension.
The main body structure is provided with a gusset plate, and the connecting node is connected with the gusset plate through a high-strength bolt. The concrete connection mode is as follows: and (3) welding a joint plate at a relevant part (such as a beam column joint), wherein the joint plate is provided with bolt holes corresponding to the connecting joints, and the joint plate and the connecting joints are directly connected by adopting high-strength bolts.
An energy dissipation method of a multistage self-resetting buckling-restrained brace is characterized in that the multistage self-resetting buckling-restrained brace is adopted, energy is dissipated through the action of a friction plate and a stable steel bar, and energy is dissipated through a belleville spring so as to improve bearing capacity; self-resetting capability is provided by a belleville spring; the two-stage buckling-restrained units on the two sides have different bearing capacities, the two-stage buckling-restrained unit with small bearing capacity is used as the energy dissipation component in the first stage, and the two-stage buckling-restrained unit with large bearing capacity is used as the energy dissipation component in the second stage. The bearing capacity of the two secondary buckling restrained units is different by utilizing the number and the types of the belleville springs to provide corresponding self-resetting capacity.
The invention has the beneficial effects that: in order to prevent the integral buckling of the energy dissipation brace when the energy dissipation brace is pressed, a steel pipe is sleeved outside the slotted steel plate, so that the integral rigidity inside and outside the plane of the brace is increased, and the integral stability of the energy dissipation brace is improved. And because the lengths of the secondary buckling-restrained units on the left side and the right side are different, the bearing capacity of the secondary buckling-restrained unit on the left side is not equal to that on the right side, and the bearing capacity of the secondary buckling-restrained unit on the left side is larger than that of the secondary buckling-restrained unit on the right side. When the earthquake acts, the right secondary buckling-restrained unit enters a buckling energy dissipation state firstly, and the state is a first-stage energy dissipation state; then, along with the enhancement of earthquake acting force, the secondary buckling-restrained unit on the left side enters a buckling energy dissipation state as a second-stage energy dissipation state. And the corresponding self-resetting devices on the left side and the right side bear the tension and compression load, and the butterfly spring and the friction plate dissipate the seismic energy to ensure that the inner core support does not buckle under the action of the earthquake. When the bearing capacity of the energy dissipation support is determined by the strength of the belleville spring, the belleville spring can contract and deform under the action of tension and compression load, and the energy dissipation effect of the belleville spring is fully exerted. When the component is under the action of a small axial force, as a long telescopic position is reserved at the rear part of the energy-consuming support core component, the core support component on the right side of the energy-consuming support core component is firstly drawn close to the middle under the action of pressure, at the moment, the belleville spring on the right side is in a compressed state, but the core support component does not bend, and the belleville spring on the left side does not work. When the axial force continuously increases, the design bearing capacity of the right secondary buckling-restrained component is exceeded, the left core supporting component is closed to the middle under the action of pressure, the left belleville spring is compressed, and the fact that the core supporting component does not yield is guaranteed. Correspondingly, the core components at the two ends of the energy consumption support extend outwards under the action of tensile force, and the springs stretch outwards along the central limiting component. And corresponding limiting blocks are arranged to ensure that the belleville springs do not exceed the bearing range. Therefore, under the action of repeated tension and compression loads, the belleville springs are repeatedly in a telescopic deformation state, and the central limiting component is in contact with the rear friction plate along with the telescopic deformation of the belleville springs to consume energy, so that the aims of consuming seismic energy and protecting the main body structure are fulfilled. And after the earthquake force disappears, the self-resetting buckling restrained brace can enable the component to be restored to the initial state through restoring force provided by the corresponding belleville springs on the left side and the right side, and residual deformation of the whole structure is reduced. The invention solves the problems that the traditional buckling-restrained energy dissipation support cannot play a role under the action of a small earthquake and the buckling of the support cannot be reset after the earthquake so as to cause larger residual deformation of the integral structure, and effectively reduces the structural damage and the residual deformation of the integral structure under the action of the earthquake. The self-resetting buckling-restrained energy dissipation brace can be produced in a factory prefabrication mode, is installed through bolts on site, is high in construction speed, and is energy-saving and environment-friendly. The invention is suitable for frame structure, steel structure and high-rise structure buildings, in particular to industrialized damping buildings.
In this embodiment, the length of the left secondary buckling-restrained unit is greater than that of the right secondary buckling-restrained unit, and specifically, the lengths of the left stabilizing steel bar, the steel frame support and the friction plate are all greater than that of the right side; meanwhile, the number of the left and right belleville springs is one, the length of the left belleville spring is larger than that of the right belleville spring, and the two belleville springs are identical in shape. The bearing capacity of the left secondary buckling-restrained unit is larger than that of the right secondary buckling-restrained unit through the arrangement.
Example two
In this embodiment, the length of the left secondary buckling-restrained unit is greater than that of the right secondary buckling-restrained unit, wherein the lengths of the connecting node, the support core member, the steel frame support and the friction plate are equal, the lengths of the left outer sleeved steel pipe, the stabilizing steel bar and the belleville springs are greater than that of the right side, and the number of the left belleville spring and the right belleville spring is one and the shape of the left belleville spring and the right belleville. The bearing capacity of the left secondary buckling-restrained unit is larger than that of the right secondary buckling-restrained unit through the arrangement.
The embodiment is not described in the first embodiment.
EXAMPLE III
In this embodiment, the length of the left secondary buckling-restrained unit is equal to the length of the right secondary buckling-restrained unit, the number of the belleville springs on the left and right sides is one, and the shape of the left belleville spring is different from that of the right side, so that the bearing capacity of the left secondary buckling-restrained unit is larger than that of the right side.
The embodiment is not described in the first embodiment.
Example four
In this embodiment, the length of the left secondary buckling-restrained unit is greater than that of the right secondary buckling-restrained unit, and specifically, the lengths of the left stabilizing steel bar, the steel frame support and the friction plate are all greater than that of the right side; meanwhile, the number of the left-side belleville springs is two, the number of the right-side belleville springs is one, and the lengths of the belleville springs are equal. The bearing capacity of the left secondary buckling-restrained unit is larger than that of the right secondary buckling-restrained unit through the arrangement.
The embodiment is not described in the first embodiment.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The utility model provides a multistage self-reset buckling restrained brace which characterized in that: the anti-buckling device comprises a middle positioning plate and two-stage anti-buckling units positioned on the left side and the right side of the middle positioning plate, wherein the bearing capacity of the two-stage anti-buckling unit on one side is larger than that on the other side; the secondary buckling-restrained unit comprises a connecting node, a support core component, an outer sleeve steel pipe, a sliding bearing plate, a fixed bearing plate, a stable steel bar, a steel frame support, a belleville spring and a friction plate; the outer sleeve steel pipe is fixed with the middle positioning plate; the support core component, the sliding bearing plate and the stable steel bar are sequentially connected from outside to inside and integrally slide in the outer sleeve steel pipe; the middle part of the support core component penetrates through the outer sleeve steel pipe, and the outer end of the support core component is fixedly connected with the connecting node; the fixed bearing plate, the steel frame support and the middle positioning plate are sequentially connected from outside to inside, the fixed bearing plate and the steel frame support are positioned in the outer sleeve steel pipe, and the inner end of the stable steel bar penetrates through the fixed bearing plate; a friction plate which is contacted with the stable steel bar is arranged between the fixed bearing plate and the middle positioning plate; the compressed belleville spring is sleeved outside the stable steel bar and is positioned between the fixed bearing plate and the sliding bearing plate.
2. The multi-step self-resetting buckling restrained brace according to claim 1, wherein: the length of the left secondary buckling-restrained unit is greater than that of the right secondary buckling-restrained unit; the two secondary buckling-restrained units are arranged in a straight line.
3. The multi-step self-resetting buckling restrained brace according to claim 2, wherein: the lengths of the left side stabilizing steel bar, the steel frame support and the friction plate are all larger than the length of the right side stabilizing steel bar, the steel frame support and the friction plate.
4. The multi-step self-resetting buckling restrained brace according to claim 1, wherein: the number and/or shape and/or size of the belleville springs on one side is different from the other side.
5. The multi-step self-resetting buckling restrained brace according to any one of claims 1 to 4, wherein: the support core component adopts a rod-shaped structure with a square or round cross section; the outer sleeved steel pipe is a square pipe; the cross sections of the fixed bearing plate, the sliding bearing plate and the middle positioning plate are square; the cross section of the stabilizing steel bar is circular.
6. The multi-step self-resetting buckling restrained brace according to any one of claims 1 to 4, wherein: the number of the steel frame supports is four, and the steel frame supports are arranged around the stabilizing steel bars in the up-down direction, the front-back direction and the back direction; the quantity of friction disc is four, encircles the setting of stabilizing the rod iron in upper and lower, front and back direction, and hugs closely and stabilizes the rod iron, and the cross section of friction disc is the rectangle.
7. The multi-step self-resetting buckling restrained brace according to any one of claims 1 to 4, wherein: the second-stage buckling-restrained unit also comprises a limiting plate for limiting the outward sliding of the sliding bearing plate, and the limiting plate is fixed on the inner side wall of the outer sleeve steel pipe; the distance between the left limiting plate and the fixed bearing plate is the same or different from the distance between the left limiting plate and the fixed bearing plate.
8. The multi-step self-resetting buckling restrained brace according to any one of claims 1 to 4, wherein: the second-stage buckling-restrained unit also comprises two limiting blocks, one limiting block is fixed on the inner side of the sliding bearing plate, and the other limiting block is fixed on the outer side of the fixed bearing plate; the stopper is circular, and belleville spring's tip cup joints on the stopper, and the stopper is opened has the round hole to supply to stabilize the rod iron and pass.
9. An energy dissipation method of a multi-stage self-resetting buckling restrained brace, which adopts a multi-stage self-resetting buckling restrained brace as claimed in any one of claims 1 to 8, and is characterized in that: energy is dissipated through the friction between the friction plate and the stable steel bar, and energy is dissipated through the compression deformation of the belleville spring, so that the bearing capacity of the component is improved; self-resetting capability is provided by a belleville spring; the two-stage buckling-restrained units on the two sides have different bearing capacities, the two-stage buckling-restrained unit with small bearing capacity is used as the energy dissipation component in the first stage, and the two-stage buckling-restrained unit with large bearing capacity is used as the energy dissipation component in the second stage.
10. The application of the multi-order self-resetting buckling restrained brace is characterized in that: use of the multi-step self-resetting buckling restrained brace of any one of claims 1 to 8 in a frame structure, a steel structure, a high-rise structure or an industrial building.
Priority Applications (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944360A (en) * | 2021-11-15 | 2022-01-18 | 重庆大学 | Multi-stage self-resetting support member and assembling method thereof |
| CN114922303A (en) * | 2022-03-31 | 2022-08-19 | 中国建筑第八工程局有限公司 | Self-resetting buckling-restrained multi-section shearing energy-consumption supporting structure |
| CN116290450A (en) * | 2023-04-12 | 2023-06-23 | 燕山大学 | Multi-stage anti-seismic self-resetting support |
-
2020
- 2020-08-18 CN CN202010830893.8A patent/CN111962704A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944360A (en) * | 2021-11-15 | 2022-01-18 | 重庆大学 | Multi-stage self-resetting support member and assembling method thereof |
| CN113944360B (en) * | 2021-11-15 | 2022-11-29 | 重庆大学 | Multi-stage self-resetting support component and assembling method thereof |
| CN114922303A (en) * | 2022-03-31 | 2022-08-19 | 中国建筑第八工程局有限公司 | Self-resetting buckling-restrained multi-section shearing energy-consumption supporting structure |
| CN116290450A (en) * | 2023-04-12 | 2023-06-23 | 燕山大学 | Multi-stage anti-seismic self-resetting support |
| CN116290450B (en) * | 2023-04-12 | 2023-09-22 | 燕山大学 | Multi-stage anti-seismic self-resetting support |
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