CN212453166U - Self-resetting buckling-restrained brace - Google Patents

Self-resetting buckling-restrained brace Download PDF

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Publication number
CN212453166U
CN212453166U CN202021721548.2U CN202021721548U CN212453166U CN 212453166 U CN212453166 U CN 212453166U CN 202021721548 U CN202021721548 U CN 202021721548U CN 212453166 U CN212453166 U CN 212453166U
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China
Prior art keywords
bearing plate
plate
buckling
self
central positioning
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CN202021721548.2U
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Chinese (zh)
Inventor
谭平
赵啸峰
陈林
李晓磊
龙耀球
周福霖
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Guangzhou University
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Guangzhou University
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Abstract

Relates to a self-resetting buckling-restrained brace, which comprises a central positioning plate and two secondary buckling-restrained units positioned on the left side and the right 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 support core component, the sliding bearing plate and the stable steel bar are sequentially connected and 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 central positioning plate are sequentially connected, 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 central positioning plate; the compressed belleville spring is sleeved outside the stabilizing steel bar. The utility model discloses simple structure increases major structure's bearing capacity, has from the reset capability, belongs to building energy dissipation shock-absorbing structure technical field.

Description

Self-resetting buckling-restrained brace
Technical Field
The utility model relates to a building energy dissipation shock-absorbing structure, concretely relates to from bucking support of preventing that restores to throne.
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, the beam column joint area in the whole structure is kept in an elastic state, 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 traditional buckling restrained brace suffers from a small earthquake, the brace component cannot enter a buckling state in time, and the energy consumption capacity of the component cannot be exerted. And the stiffness of the member degrades more rapidly after buckling occurs.
Therefore, the anti-buckling supporting device which can not only consume earthquake energy under the action of an earthquake, but also can meet the self-resetting capability provided by the anti-buckling supporting device is developed, and the anti-buckling supporting device has important practical significance for reducing or avoiding the damage and residual deformation of a main structure caused by the damage of a beam-column joint prior to the support member, thereby improving the safety of the structure, enhancing the disaster resistance of the structure and reducing the repair cost of a damaged building after disaster.
SUMMERY OF THE UTILITY MODEL
To the technical problem who exists among the prior art, the utility model aims at: the self-resetting buckling restrained brace not only can effectively dissipate seismic energy, but also has self-resetting capability.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a self-resetting buckling-restrained brace comprises a central positioning plate and two-stage buckling-restrained units positioned on the left side and the right side of the central positioning plate; 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 central 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 central 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 central 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 two secondary buckling prevention units have the same structure and are arranged symmetrically left and right relative to the central positioning plate; the two secondary buckling-restrained units are arranged in a straight line.
Preferably, the support core member 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 central 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 sliding bearing plate to slide outwards, and the limiting plate is fixed on the inner side wall of the outer sleeve steel pipe.
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 circular port and supplies to stabilize the rod iron and pass.
Preferably, rigid connection 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 central positioning plate.
Preferably, 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.
An energy dissipation method of a 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 that the bearing capacity is improved; self-resetting capability is provided by the belleville spring.
Preferably, the number and the types of the belleville springs are used for providing corresponding self-resetting capability, and the bearing force of the two secondary buckling prevention units is equal.
The utility model has the advantages of as follows:
under the design that the original main structure is guaranteed, the self-resetting buckling-restrained brace can increase the bearing capacity of the main structure, meanwhile, the number and types of the disc springs on the left side and the right side are utilized to provide corresponding self-resetting capacity for the component, the length of the core component of the support on the left side is the same as that on the right side, and the bearing capacity of the secondary buckling-restrained unit on the left side is equal to that on the right side. The self-resetting buckling restrained brace has the advantages of simple structure, convenient 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 butterfly spring is used as a main energy consumption component, and the energy received by the support component is dissipated through the deformation of the butterfly spring. The self-resetting buckling-restrained brace can consume earthquake energy under the action of small earthquake or medium earthquake, and simultaneously can reduce the damage and the corresponding residual deformation of the main body structure under the action of large earthquake.
The rigid connection is adopted, so that the connection part can be ensured to be in a stable state.
The utility model 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 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 an operating state diagram of the self-resetting buckling restrained brace during earthquake.
Fig. 7 is a diagram of an operating state of the self-resetting buckling restrained brace which is reset after 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 center 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.
A self-resetting buckling-restrained brace comprises a central positioning plate and two-stage buckling-restrained units positioned on the left side and the right side of the central positioning plate. The earthquake-proof beam column is used for relieving the damage of the beam column connection under the action of an earthquake and relieving the damage and residual deformation of the main body structure.
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 central 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 central 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 central 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 central positioning plate and the outer sleeve steel pipe are connected by welding, so that the connection between the central 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.
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 (section area and section shape) of the belleville springs on the left side and the right side can be designed according to the actual requirements of projects, but the belleville springs on the left side and the right side are guaranteed to be capable of keeping elasticity under the action of an earthquake, and are not out of efficacy due to the fact that energy is dissipated through tensile compression deformation under the action of a large earthquake.
The central positioning plate is also a key part of stress, the central positioning plate needs to be reliably connected with the outer sleeve steel pipe when stressed, and the central positioning plate and the outer sleeve steel pipe are ensured 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 central positioning plate, so that when the connecting node is subjected to axial load, the load is completely transmitted to the internal self-resetting device through the core supporting member, and the belleville springs in the self-resetting device consume seismic energy through continuous compression and stretching, so that the damage and the participation deformation of the main body structure are reduced.
The two secondary buckling-restrained units have the same structure and are arranged in a bilateral symmetry mode relative to the central positioning plate; the two secondary buckling-restrained units 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 central 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 central 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 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 that the bearing capacity is improved; self-resetting capability is provided by the belleville spring. The corresponding self-resetting capability is provided by the number and the types of the belleville springs, and the bearing capacity of the two secondary buckling restrained units is equal.
The utility model has the advantages 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, the integral stability of the energy dissipation brace is improved, the self-resetting buckling-restrained brace bears the tension and compression load action through an internal self-resetting device, the earthquake energy is dissipated through a belleville spring and a friction plate, and the inner core brace is guaranteed not to buckle under the earthquake action. 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 member is pressed, as a longer telescopic position is reserved at the rear part of the energy-consumption support core member, the core support members at the two ends of the energy-consumption support core member are close to the middle under the action of pressure, and at the moment, the belleville spring is in a compressed state, but the core support member is not bent. The core components at the two ends of the energy dissipation 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 the restoring force provided by the belleville spring. The utility model provides a traditional buckling-restrained energy dissipation brace problem that can't restore to the throne under after the earthquake, effectively alleviate the structural damage and the residual deformation of overall structure production under the earthquake effect. 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 utility model is suitable for an among frame construction, steel construction, high-rise structure building, especially the shock attenuation building of industrialization.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are 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 equivalent replacement modes, and all are included in the scope of the present invention.

Claims (8)

1. A self-resetting buckling restrained brace is characterized in that: the buckling preventing device comprises a central positioning plate and two-stage buckling preventing units positioned on the left side and the right side of the central positioning plate; 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 central 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 central 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 central 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. A self-resetting buckling restrained brace according to claim 1, wherein: the two secondary buckling-restrained units have the same structure and are arranged in a bilateral symmetry mode relative to the central positioning plate; the two secondary buckling-restrained units are arranged in a straight line.
3. A self-resetting buckling restrained brace according to claim 1, wherein: 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 central positioning plate are square; the cross section of the stabilizing steel bar is circular.
4. A self-resetting buckling restrained brace according to claim 1, 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.
5. A self-resetting buckling restrained brace according to claim 1, wherein: 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.
6. A self-resetting buckling restrained brace according to claim 1, 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.
7. A self-resetting buckling restrained brace according to claim 1, wherein: rigid connection 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 central positioning plate.
8. A self-resetting buckling restrained brace according to claim 1, wherein: 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.
CN202021721548.2U 2020-08-18 2020-08-18 Self-resetting buckling-restrained brace Withdrawn - After Issue CN212453166U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111962703A (en) * 2020-08-18 2020-11-20 广州大学 Self-resetting buckling-restrained brace and energy dissipation method thereof
CN111962703B (en) * 2020-08-18 2024-07-05 广州大学 Self-resetting buckling-restrained brace and energy dissipation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111962703A (en) * 2020-08-18 2020-11-20 广州大学 Self-resetting buckling-restrained brace and energy dissipation method thereof
WO2022037530A1 (en) * 2020-08-18 2022-02-24 广州大学 Self-resetting buckling-restrained brace and energy consumption method therefor
CN111962703B (en) * 2020-08-18 2024-07-05 广州大学 Self-resetting buckling-restrained brace and energy dissipation method thereof

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