CN108049687B - Self-resetting buckling restrained brace self-resetting method - Google Patents
Self-resetting buckling restrained brace self-resetting method Download PDFInfo
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- CN108049687B CN108049687B CN201711358183.4A CN201711358183A CN108049687B CN 108049687 B CN108049687 B CN 108049687B CN 201711358183 A CN201711358183 A CN 201711358183A CN 108049687 B CN108049687 B CN 108049687B
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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
A self-resetting buckling restrained brace self-resetting method belongs to the field of building shock absorption, is used for solving the problem that the existing brace does not have self-resetting capability, and has the technical key points that: the energy-consuming inner core is subjected to load transmitted from a building, the energy-consuming inner core deforms, the deformation of the energy-consuming inner core causes gears on two sides of the energy-consuming inner core to be meshed with racks on the steel plate in a load range, and the deformation enables the gears to drive the racks to move towards the opposite direction of the deformation of the energy-consuming inner core, so that the shape and the position of the energy-consuming inner core connected with the gears are restored towards the natural state; when the load range is exceeded, the vortex springs fixed on the upper side and the lower side of the gear are deformed due to the deformation of the energy consumption inner core and generate torque in a plane, the vortex springs are limited on the parallel inner walls, and restoring force generated by the vortex springs enables the gear to drive the rack to move towards the opposite direction of the deformation of the energy consumption inner core, so that the energy consumption inner core connected with the gear restores to the shape and the position in a natural state.
Description
The application is divisional application with application number 201710348602X, application date 2017-05-17 and invention name self-resetting buckling restrained brace.
Technical Field
The invention belongs to the field of building shock absorption, and relates to a buckling restrained brace.
Background
The traditional civil engineering structural support mainly has: the support forms such as eccentric support, energy-consuming angle support, energy-consuming frame support and the like, most of the supports consume earthquake energy mainly through deformation, and the purpose of reducing the effect brought by the earthquake is achieved. Due to the elastic-plastic properties of the structural members, the energy-consuming supports inevitably suffer some damage and deformation, which is not conducive to energy dissipation and has an effect on the stability of the building.
The energy dissipation and shock absorption technology mainly comprises the following steps: by adding the passive energy dissipation device in the original structure, the earthquake energy consumed by structural components originally is consumed, and the deformation and damage of the structure caused by the vibration effect are greatly reduced. The energy consumption devices developed at present mainly include: viscous energy dissipaters, viscoelastic energy dissipaters, metal energy dissipaters and friction energy dissipaters, wherein the first two types are called speed-related energy dissipaters, the second two types are called hysteresis energy dissipaters, and the metal energy dissipaters are divided into lead dampers and mild steel dampers.
The hysteresis type energy dissipater consumes energy by utilizing deformation and hysteresis, and the velocity-dependent energy dissipater obtains damping force by utilizing a velocity-dependent viscosity resistance effect and changing from a small amplitude to a large amplitude.
A Bucking Restrained Brace (BRB) is a form of energy dissipation that is considered to have a forward bracing that overcomes the shortcomings of traditional bracing Buckling. The energy-saving seismic energy-saving system has a full hysteresis curve under seismic load, so that the energy-saving seismic energy-saving system has excellent energy consumption capability and good seismic performance in application, and is greatly popularized in developed countries. The buckling-restrained brace component consists of two parts, namely a core component and a peripheral constraint component, under the action of an earthquake, the core component firstly yields to protect the main body frame, and the earthquake energy can be dissipated. Has excellent performance of both support and energy consumption, and can be used as one of the best damping and energy dissipating devices. The front person attaches the friction damper to the end of the buckling restrained brace, but after the friction damper is subjected to a severe earthquake, the brace of the friction damper is not easy to detach due to buckling. The traditional self-resetting support realizes the self-resetting function by adding the resetting rib, but prestress needs to be applied in an initial state, and the energy consumption capability of the support is seriously influenced by the accurate application of the prestress and the loss of the prestress; the replacement frequency and maintenance cost of the inner core are high.
Disclosure of Invention
In order to solve the problems that the existing support mainly depends on the deformation energy consumption of an inner core, the inner core possibly loses effect prematurely in the earthquake, the replacement and maintenance cost is high, the self-resetting capability is not available, and the support is insensitive to small vibration, the invention provides the following technical scheme: a self-resetting buckling-restrained brace comprises an energy-consuming inner core, a steel plate with a rack and a restraining outer sleeve, wherein the steel plate is connected with the end part of the energy-consuming inner core in the axial direction; the constraint outer sleeve is covered on the peripheries of the energy consumption inner core and the steel plates, the constraint outer sleeve is provided with a group of opposite and parallel inner walls, the energy consumption inner core is parallel to the energy consumption outer sleeve, the two steel plates with racks are symmetrically fixed on two side surfaces of the steel plates respectively, a gear meshed with the racks is installed between the steel plates with the racks and the inner walls of the opposite and parallel constraint outer sleeves, two vortex springs are directly fixed on the upper side and the lower side of the gear and are limited on the parallel inner walls, and the gear and the vortex springs are fixed between the steel plates with the racks and the inner walls of the opposite and parallel constraint outer sleeves by support frames extending out of the parallel inner walls.
Furthermore, the support frame comprises two cross frames fixed on the parallel inner walls, the two cross frames are respectively positioned above the two vortex springs, and a vertical shaft penetrates through the cross frames, the vortex springs and the gears.
Furthermore, the energy dissipation inner core is a long rectangular body and is inserted in the central position between two parallel inner walls in the constraint outer sleeve in the shape of a long-tube rectangle.
Furthermore, the vortex spring is limited on the parallel inner wall by a limiting clamping groove.
Furthermore, from restoring to throne buckling restrained brace still includes baffle, connecting plate, baffle one end is connected the steel sheet, its other end is connected the connecting plate.
Furthermore, the steel plate and the steel plate with the rack are provided with bolt holes, and the steel plate with the rack are tightly connected through bolts.
Further, the scroll spring is made of a memory alloy.
Has the advantages that: the invention installs a gear at the end of the support, installs racks meshed with the gear on two sides of the inner core, and directly fixes (contactingly fixes) two vortex springs limited on the parallel inner walls on the upper and lower sides of the gear, and the gear and the vortex springs are fixed between the steel plate with the racks and the inner wall of the opposite and parallel constraint outer sleeve by the support frame extending from the parallel inner walls. The axial load bearing of the energy-consuming inner core is dispersed on the spring vortex plane to bear, so that on one hand, the energy-consuming burden of the energy-consuming inner core is greatly reduced, the inner core instability is reduced, the replacement frequency of the inner core is reduced, and the maintenance cost is reduced; on the other hand, the spring becomes an energy consumption main body, the torsion force of the vortex spring is fully utilized, the load bearing capacity is stronger, and the spring is not easy to destabilize; in another aspect, the torsion force can be used for correcting the deformation of the inner core while the vortex spring consumes energy, so that the service time of the energy-consuming inner core is further prolonged, and the self-resetting capability of the support is realized. More importantly, in order to obtain larger torsional force, the vortex spring is used, however, the vortex spring can cause the reduction of the sensitivity to vibration, in order to make up for the defect, the meshing of the symmetrical gears and the racks on two sides is used for consuming energy during primary vibration, when the vibration strength reaches the working strength of the vortex spring, the vortex spring provides large torsional force to resist deformation and enhance the instability prevention capability, and by means of the measure, the strong torsional force of the vortex spring can still be utilized on the premise of not sacrificing the vibration sensitivity.
Drawings
Fig. 1 is a schematic structural appearance.
Fig. 2 is a schematic view of the composition of the energy-dissipating core.
Fig. 3 is a sectional position view.
FIG. 4 is an exploded view of the constraining outer sleeve.
FIG. 5 is a cross-sectional view taken along line 1-1 of FIG. 3.
FIG. 6 is a cross-sectional view 2-2 of FIG. 3.
FIG. 7 is a view of the gear and scroll spring assembly.
Wherein: 1. the energy-consuming device comprises an energy-consuming inner core, 2 parts of steel plates, 3 parts of steel plates with racks, 4 parts of baffles, 5 parts of connecting plates, 6 parts of constraint outer sleeves, 7 parts of parallel inner walls, 8 parts of racks, 9 parts of gears, 10 parts of vortex springs, 11 parts of cross frames, 12 parts of vertical shafts and 13 parts of limiting clamping grooves.
Detailed Description
Example (b): a self-resetting buckling-restrained brace comprises an energy-consuming inner core 1, a steel plate 2 connected with the end part of the energy-consuming inner core, a steel plate 3 with a rack, a baffle 4, a connecting plate 5 and a restraining outer sleeve 6; the constraint outer sleeve 6 is covered on the peripheries of the energy consumption inner core 1 and the steel plate 2, the constraint outer sleeve 6 is provided with a group of parallel inner walls 7 which are opposite and parallel, the energy consumption inner core 1 is parallel to the energy consumption outer core, and the energy consumption inner core 1 is a long rectangular body which is inserted in a basically central position inside the constraint outer sleeve 6 in a long rectangular cylinder shape. Two steel plates 3 with racks are respectively and symmetrically fixed on two side surfaces (the side surfaces are parallel surfaces parallel to the parallel inner walls) of the steel plates 2, a gear 9 meshed with the rack 8 is arranged between each steel plate 3 with racks and the inner wall of the constraint outer sleeve 6 which is opposite and parallel to the steel plate with racks, and two vortex springs 10 limited on the parallel inner wall 7 are directly fixed on the upper and lower sides of the gear 9, the gear 9 and the scroll spring 10 are fixed between the steel plate 3 with rack and the inner wall of the restraining outer sleeve 6 opposite and parallel to it by a support frame extending from the parallel inner wall, said support frame comprising two cross frames 11 fixed to the parallel inner wall, the vortex spring assembly is respectively positioned above two vortex springs 10 and a vertical shaft 12 penetrating through a cross frame 11, the vortex springs 10 and a gear 9, and the vortex springs 10 are limited on the parallel inner walls 7 by limiting clamping grooves 13. Therefore, the energy-consuming inner core is used as the central line in the scheme, the gears, the vortex springs and the racks on the two sides are symmetrically installed respectively, and the centers of the gears, the vortex springs and the racks are symmetrically arranged, so that the reaction force of the two vortex planes is more consistent, the deformation correction is realized, and the energy-consuming effect of the vortex planes is better. In this embodiment, the space near the entire energy-consuming core has the possibility of installing the gear spring, however, in practice, it is found that, the closer to the starting position of the load transmission, the corresponding to the ending position of the starting position, that is, the space near the two terminals of the energy-consuming core, the more the torsion plane is formed by using the vortex spring, the stronger the correction requirement on the energy-consuming core is needed, and the two positions are held, the correction can be started at the source, the deformation transmission is not caused as much as possible, so that the deformation interval can be further reduced, the deformation inhibiting capability is stronger, and therefore, the scheme is formed by selecting the mode of placing the connecting steel plates at the two ends of the core and installing the racks on the connecting steel plates.
Furthermore, in general, the energy dissipating inner core will have a portion outside the constraining outer sleeve that is more weakened and subject to failure due to direct exposure and free support than the energy dissipating inner core inside the constraining outer sleeve. The steel plate, the gear, the rack and the vortex spring are combined in a limiting mode, the steel plate is exposed out of the part of the constraint outer sleeve, the energy-consuming inner core is replaced by the steel plate, the steel plate with the rack is fixed with the steel plate in a bolt fixing connection mode, and therefore the rack is fixed, and although the part is not covered by the energy-consuming inner core, the strength of the exposed part is enhanced to a certain degree; the vortex spring makes the linear displacement of power consumption inner core change into the angle displacement to, it is in near the tip (being close to naked steel sheet part), thereby make spacing vortex spring, the gear of meshing and rack and support frame can form the frame in this naked steel sheet, have certain supporting role, and receive vortex spring's torsional force, on the basis of supporting, greatly reduce this naked part motion (rocking and swing) under the load effect, thereby can shorten the range of connection region, this scheme has realized the purpose that prevents the unstability.
In this embodiment, the self-resetting buckling restrained brace further comprises a baffle and a connecting plate, wherein one end of the baffle is connected to the steel plate, and the other end of the baffle is connected to the connecting plate. The steel plate and the steel plate with the rack are provided with bolt holes, and the steel plate with the rack are tightly connected through bolts. The vortex spring is made of memory alloy. The vortex spring is composed of a vortex spring body and force arms connected to two end parts of the vortex spring. The superelastic properties of shape memory alloys have many advantages over other common metallic materials: firstly, the superelasticity fatigue property of the shape memory alloy is good, and other materials are inevitably damaged in circulation, so that the service life is influenced; secondly, the shape memory alloy has a large recoverable strain value, which is difficult to realize by common metal materials; finally, because the austenite modulus of elasticity is greater than the martensite modulus of elasticity, the shape memory alloy modulus of elasticity increases with increasing temperature (as opposed to common metals), which allows it to maintain a high modulus of elasticity at higher temperatures. Thus, the spring portion of the device can be made of a shape memory alloy.
Under the action of an earthquake, the energy-consuming inner core is subjected to load transmitted from a building, the energy-consuming inner core is deformed, the deformation of the energy-consuming inner core causes gears on two sides of the energy-consuming inner core to be meshed with racks on the steel plate in a load range, and the deformation enables the gears to drive the racks to move towards the opposite direction of the deformation of the energy-consuming inner core, so that the shape and the position of the energy-consuming inner core connected with the gears are restored towards the natural state; when the load range is exceeded (the restoring force of the gear cannot restore the energy consumption inner core), the vortex springs fixed on the upper side and the lower side of the gear are deformed due to the deformation of the energy consumption inner core and generate torque in a plane, the vortex springs are limited on the parallel inner wall, the restoring force generated by the vortex springs enables the gear to drive the rack to move towards the opposite direction of the deformation of the energy consumption inner core, and therefore the shape and the position of the energy consumption inner core connected with the gear are restored towards the natural state.
Therefore, the main purpose of the present disclosure is to provide a self-resetting device for alleviating the impact of vibration on the structure, and to solve the problem of damage to the inner core, in view of the design of the conventional buckling-restrained brace. In case of earthquake, the supporting capability is improved. The anti-buckling support is made into a vortex spring, the vortex spring is added to the gear, the anti-buckling support energy dissipation inner core, the gear, the vortex spring and the limiting clamping groove in the outer sleeve work together, linear displacement generated integrally is converted into angular displacement, and the anti-buckling support energy dissipation inner core has a certain self-resetting function and slows down damage of the inner core. The problem that the inner core stroke cannot be met due to the fact that the spring corner is too small is solved through the gear.
After the vortex spring is deformed, the material is subjected to bending moment to generate bending elastic deformation, so that the spring is twisted on the plane of the spring. The deformation angle is proportional to the torque, has high torque, and is applied to a mechanism working for a long time with a multi-angle torque, and has the characteristic of being not easy to fatigue. The utility model discloses simple easy operation can be connected through the mode of equipment, and it is convenient and convenient to dismantle and repair and daily maintenance after the shake.
In this embodiment, the spring is connected through the riveting mode with the gear, guarantees that the spring can rotate with the gear together.
The implementation method comprises the following steps: under the action of an earthquake, the inner core can be subjected to load transmitted from a building, the inner core can deform, the inner core can drive the vortex spring to deform, torque is generated in a plane, and high torque is achieved. Because the existence of spacing draw-in groove on the outer sleeve, the torsion that produces can drive the inner core motion, makes it return to original position, therefore the device has from the reset function.
When the structure receives earthquake action, the end can realize self-resetting through the restoring force of the vortex spring no matter when the end is pressed or pulled, the pressed deformation of the inner core is reduced, the energy consumption capability is improved, the integral stability can be ensured after the inner core is yielded, and the normal support is not influenced.
The above description is only for the purpose of creating a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (1)
1. A self-resetting buckling restrained brace self-resetting method is characterized in that an energy-consuming inner core is subjected to load transmitted from a building, the energy-consuming inner core generates deformation, a steel plate is connected with an end part in the axial direction of the energy-consuming inner core, a restraining outer sleeve is covered on the peripheries of the energy-consuming inner core and the steel plate, the restraining outer sleeve is provided with a group of parallel inner walls which are opposite and parallel to each other, the energy-consuming inner core is parallel to the energy-consuming inner core, gears on two sides of the energy-consuming inner core are meshed with racks on the steel plate due to deformation of the energy-consuming inner core in a load range, and the gears drive the racks to move in the opposite direction of deformation of the energy-consuming inner core; when the load range is exceeded, the vortex springs fixed on the upper side and the lower side of the gear are deformed due to the deformation of the energy consumption inner core and generate torque in a plane, the vortex springs are limited on the parallel inner walls, and restoring force generated by the vortex springs enables the gear to drive the rack to move towards the opposite direction of the deformation of the energy consumption inner core, so that the energy consumption inner core connected with the gear restores to the shape and the position in a natural state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711358183.4A CN108049687B (en) | 2017-05-17 | 2017-05-17 | Self-resetting buckling restrained brace self-resetting method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711358183.4A CN108049687B (en) | 2017-05-17 | 2017-05-17 | Self-resetting buckling restrained brace self-resetting method |
| CN201710348602.XA CN107023207B (en) | 2017-05-17 | 2017-05-17 | Self reset curvature-prevention support |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710348602.XA Division CN107023207B (en) | 2017-05-17 | 2017-05-17 | Self reset curvature-prevention support |
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| CN108049687A CN108049687A (en) | 2018-05-18 |
| CN108049687B true CN108049687B (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710348602.XA Active CN107023207B (en) | 2017-05-17 | 2017-05-17 | Self reset curvature-prevention support |
| CN201711358183.4A Active CN108049687B (en) | 2017-05-17 | 2017-05-17 | Self-resetting buckling restrained brace self-resetting method |
| CN201711358197.6A Active CN108035596B (en) | 2017-05-17 | 2017-05-17 | The automatic runback device of self reset curvature-prevention support |
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| CN201710348602.XA Active CN107023207B (en) | 2017-05-17 | 2017-05-17 | Self reset curvature-prevention support |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711358197.6A Active CN108035596B (en) | 2017-05-17 | 2017-05-17 | The automatic runback device of self reset curvature-prevention support |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107299953B (en) * | 2017-08-21 | 2018-12-04 | 泉州市嘉鑫信息服务有限公司 | A kind of adjustable rotation viscous damper of damping force and its application |
| CN109024962A (en) * | 2018-08-10 | 2018-12-18 | 江苏德丰建设集团有限公司 | A kind of assembled architecture and assembled architecture building roof system energy-dissipating and shock-absorbing method |
| CN109457830A (en) * | 2018-11-21 | 2019-03-12 | 大连大学 | The comprehensive shock isolating pedestal of annular shape memory alloy spring |
| CN112873225A (en) * | 2021-01-13 | 2021-06-01 | 东莞市钜力数控科技有限公司 | Safety protection device for intelligent artificial intelligence food delivery robot |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08226252A (en) * | 1995-02-22 | 1996-09-03 | Mitsubishi Heavy Ind Ltd | Vibration control device with movable rigid mechanism for high-rise building |
| JP3711611B2 (en) * | 1996-03-05 | 2005-11-02 | 株式会社大林組 | Attenuator |
| JP2003506597A (en) * | 1999-08-03 | 2003-02-18 | ホー． ムアラ，イマズ | Structural member and motion damping device in brace device |
| JP4349110B2 (en) * | 2003-12-08 | 2009-10-21 | 株式会社大林組 | Damper device |
| JP2010133533A (en) * | 2008-12-08 | 2010-06-17 | Daiwa House Industry Co Ltd | Lock mechanism, and earthquake-resistant and vibration control structure and earthquake-resistant and base isolation structure using the lock mechanism |
| CN102587528B (en) * | 2011-01-14 | 2014-06-04 | 财团法人实验研究院 | Double-core prestressed tension self-restoring energy dissipation supporting device |
| CN102080421A (en) * | 2011-01-30 | 2011-06-01 | 东南大学 | Damping generation method through torsion type lead extrusion and damper thereof |
| CN103291797B (en) * | 2013-03-15 | 2016-01-20 | 尹学军 | A kind of frcition damper |
| CN103981968A (en) * | 2014-04-11 | 2014-08-13 | 北京工业大学 | Tubular single-plate assembly type steel-structure self-resetting buckling restrained brace |
| CN103981966A (en) * | 2014-04-11 | 2014-08-13 | 北京工业大学 | Tubular crossed plate assembly type steel-structure self-resetting pre-stressed buckling restrained brace |
| CN104912228A (en) * | 2015-06-25 | 2015-09-16 | 张勇 | Gear type re-centering damper based on SMA materials |
| CN106401257B (en) * | 2016-11-30 | 2019-01-18 | 广东技术师范学院 | A kind of buffer-type anti-quaking controller |
| CN206693721U (en) * | 2017-05-17 | 2017-12-01 | 大连大学 | A kind of self reset curvature-prevention support |
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2017
- 2017-05-17 CN CN201710348602.XA patent/CN107023207B/en active Active
- 2017-05-17 CN CN201711358183.4A patent/CN108049687B/en active Active
- 2017-05-17 CN CN201711358197.6A patent/CN108035596B/en active Active
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| Publication number | Publication date |
|---|---|
| CN107023207A (en) | 2017-08-08 |
| CN107023207B (en) | 2019-03-01 |
| CN108049687A (en) | 2018-05-18 |
| CN108035596B (en) | 2019-12-03 |
| CN108035596A (en) | 2018-05-15 |
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