CN109372144A - Combined type buckling restrained brace with more surrender sections and more waves core cells - Google Patents
Combined type buckling restrained brace with more surrender sections and more waves core cells Download PDFInfo
- Publication number
- CN109372144A CN109372144A CN201811467227.1A CN201811467227A CN109372144A CN 109372144 A CN109372144 A CN 109372144A CN 201811467227 A CN201811467227 A CN 201811467227A CN 109372144 A CN109372144 A CN 109372144A
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- China
- Prior art keywords
- core cell
- core
- bent plate
- surrender
- buckling restrained
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Classifications
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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 discloses the combined type buckling restrained braces with more surrender sections and more waves core cells, belong to building structure technology and earthquake-resistant structure field of shock absorption.The structural system includes straight panel core cell, small echo bent plate core cell, big wave bent plate core cell, ribbed stiffener, limiting card, cross tube, cement emulsified asphalt mortar, square end plate, articulated joint, gusset plate and anchor slab etc..The supporting core unit includes a straight panel core cell, two small echo bent plate core cells and two big wave bent plate core cell.Cross tube is as constraint element, filling concrete emulsified asphalt slurry between constraint element and core cell.Support is connected by articulated joint with the gusset plate in main structure.The present invention realizes the surrender of buckling restrained brace multistage, ensure that it has preferable energy consumption performance under large, medium and small shake, and core cell has good fatigue behaviour, is not easy to break, taking novel filling material can provide more stable constraint function for core cell.
Description
Technical field
The present invention relates to the combined type buckling restrained braces with more surrender sections and more waves core cells, belong to novel build
Building structure technology and earthquake-resistant structure field of shock absorption.
Background technique
Often there is the insufficient defect of anti-side rigidity in conventional frame structure, therefore, frame structure is often aided with skewed horizontal load
Its lateral resistant ability is improved, so as to form brace-frame structure system.Compared to frame structure, brace-frame structure system tool
There is higher limit lateral capacity, but precondition is without flexing unstability when being supported on compression, thus buckling restrained brace is answered
It transports and gives birth to.Constraint element is arranged in core cell periphery in buckling restrained brace, core cell buckling development when limitation support is pressurized,
Guarantee that it gives full play to material property, sufficient rigidity is provided to main structure, meanwhile, plasticity, which is generated, after core cell surrender becomes
Shape, dissipation earthquake bring energy, so, buckling restrained brace usually has the dual work of support and metal damper simultaneously
With gaining great popularity in practical projects.
Currently, the buckling restrained brace that Practical Project uses in the middle generally can play energy consumption under big shake and act on, but by
Higher in core cell yield force, core cell is difficult to enter the plastic stage under medium and small shake, and buckling restrained brace can not play gold
Belonging to the energy consumption effect of damper, main structure resists geological process often through beam column deformation damage, meanwhile, currently generally use
Buckling restrained brace the anti-side rigidity of main structure is greatly improved, cause main structure by bigger geological process,
This is undoubtedly buckling restrained brace bring side effect.In view of this, the yield force and axial rigidity of buckling restrained brace need
Adjustment and optimization.
In order to improve the deficiency of traditional buckling restrained brace, the present invention is proposed using Low Yield Point Steel as core cell
Material, meanwhile, using the different more waves core plates of bending degree as combined type core cell.Low Yield Point Steel and general structural steel
Difference, distinguishing feature is that yield strength is low, currently, the yield strength of Low Yield Point Steel mainly includes three kinds: 100MPa, 160MPa
And 225MPa, and there is stronger plastic deformation ability, while having that strength variance is small, ductility is good, low cycle fatigue property is excellent
More the advantages that.Low Yield Point Steel is mainly used for making metal energy dissipation damper, by its low-yield, superior ductility and good
Fatigue behaviour, guarantee that metal energy dissipation damper stablizes reciprocal plastic deformation under geological process, absorb a large amount of seismic energies, have
Effect reduces main structure deformation damage, protects its safety.Core cell uses more waves bent plates, and bent plate is used for buckling-restrained branch
Support, compared with common straight panel, yield force is lower, and axial rigidity is smaller, and low cycle fatigue property is more stable, meanwhile, more waves bent plates
The bending degree of support can determine the size of yield force, and multistage may be implemented using the bent plate support of differently curved degree and bend
Clothes guarantee that buckling restrained brace has good energy consumption to show under large, medium and small shake.
It is generally filled with mortar between traditional buckling restrained brace constraint element and core cell, since mortar is with relatively strong crisp
Property, it is easy to be crushed when supporting compression by core cell.Cement emulsified asphalt mortar (CA mortar) system is dripped by cement, emulsification
The groups such as blueness, sand, water and appropriate additive are grouped as, and by hydrolysis product of cement and pitch collectively as gelling matrix by sand bone
A kind of viscoplasticity composite organic-inorganic material that is cementing and being formed is expected, with superior support, buffering, adjustment and the work coordinated
With.Packing material using cement emulsified asphalt mortar as buckling restrained brace, it is possible to prevente effectively from packing material is crushed,
To stablize the effect of contraction played to core cell.
The combined type buckling restrained brace with more surrender sections and more waves core cells proposed by the present invention, core cell
Using the different more waves bent plates of bending degree, bent plate is made of Low Yield Point Steel, filling out between constraint element and core cell
Material is filled using cement emulsified asphalt mortar, it is ensured that buckling restrained brace can be so stable that mention to main structure under large, medium and small shake
For anti-side rigidity and the earthquake bring energy that dissipates.
Summary of the invention
The object of the present invention is to provide the combined type buckling restrained brace with more surrender sections and more waves core cells, branch
Support multistage under geological process is surrendered, and first section yield force is lower, guarantees that it has stable energy consumption performance under large, medium and small shake, and
And core cell low cycle fatigue property is good, the packing material support performance between constraint element and core cell is stablized.This hair
Bright core cell includes straight panel core cell, small echo bent plate core cell and big wave bent plate core cell.Two kinds of bent plate core lists
Member is only being bent in longitudinally asymmetric graphic memory, and bending degree is different.Core cell material can be Low Yield Point Steel.Inhomogeneity
The core cell of type has different yield forces because of bending degree difference, multistage surrender can be achieved under geological process, significantly
Improve and be difficult to the deficiency to consume energy in traditional buckling restrained brace under small shake, and it is abundant to consume energy.In addition, packing material of the present invention uses
Cement emulsified asphalt mortar, the material have it is superior go along with sb. to guard him and cushion performance, provide more stable constraint to core cell and make
With.
To achieve the goals above, this invention takes following technical solutions:
Combined type buckling restrained brace with more surrender sections and more waves core cells, which includes core
Heart unit, ribbed stiffener 4, limiting card 5, cross tube 6, cement emulsified asphalt mortar 7, square end plate 8, articulated joint 9, gusset plate
10 and anchor slab 11.Core cell is divided into straight panel core cell 1 and bent plate core cell, and bent plate core cell includes small echo bent plate core
Heart unit 2, big wave bent plate core cell 3；One straight panel core cell, 1, two small echo bent plate core cell 2 and two big wave are curved
Plate core cell 3 and square end plate 8 are integral prefabricated, and straight panel core cell 1 is connected with 8 plane geometry center of square end plate, two small echos
Bent plate core cell 2 is located at the two sides up and down of straight panel core cell 1, and two big wave bent plate core cell 3 is located at directly
The left and right sides of plate core cell 1.Ribbed stiffener 4 is located at core cell both ends, and limiting card 5 is located on straight panel core cell 1, is used for
Occur to be displaced to axial between limitation core cell and constraint element.Cross tube 6 is constraint element, cement-emulsified asphalt
Packing material of the mortar 7 between core cell and constraint element.Support is connect by articulated joint 9 with gusset plate 10, node
Plate 10 is connected by anchor slab 11 with main structure.
The effect of bent plate core cell is to reduce the yield strength of buckling restrained brace, the traditional buckling restrained brace of improvement
It is difficult to the defect to consume energy under medium and small shake, makes it easier to enter plastic stage, dissipation seismic energy, while reducing the axial direction of support
Tension and compression rigidity mitigates the side effect for causing main structure to increase by seismic force because support stiffness is excessive.Bent plate core cell
Material is Low Yield Point Steel, and half wave number is no less than one, and the ratio between chord length and arc length of half-wave are greater than 0.1 and less than 1, half-wave midpoint
Height is not more than 50mm.Silica gel plate is coated between core cell and cement emulsified asphalt mortar 7 as non-cohesive material, thickness takes
1-5mm。
Buckling restrained brace includes the different bent plate core cell of multiple groups bending degree, and every group of bent plate core is about square end plate
Geometric center is symmetrical in 8 planes, prevents bent plate core cell from causing square end plate 8 to be turned round about the surrender of geometric center asymmetry
Turn.
The material of core cell is not more than 230MPa, tensile strength 200MPa- according to Low Yield Point Steel, yield strength
400MPa, elongation are greater than 40%；The material of core cell is not more than 400MPa, tension according to common iron, yield strength
Intensity is not more than 530MPa, and elongation is not less than 16%.
Constraint element setting partition, the number of partition is matched with core cell number, between constraint element and core cell
Cement emulsified asphalt mortar 7 is cement-emulsified in partition corresponding with straight panel core cell 1 there are for the movable groove of ribbed stiffener
There are holes corresponding with limiting card 5 for asphalt mortar, bituminous mortar 7.
By bolted splice, anchor slab 11 is anchored in main structure, is realized with this for the articulated joint 9 of support and gusset plate 10
Connection between support and main structure.
The yield strength of packing material cement emulsified asphalt mortar 7 between constraint element and core cell is not less than
3MPa, and it is not higher than 10MPa.
The utility model has the advantages that the invention has the following advantages that
(1) buckling restrained brace of the present invention is different from traditional buckling restrained brace, is made of Low Yield Point Steel
Differently curved degree core cell, more waves core cells can be effectively reduced support yield force, make to be supported on medium and small shake
Lower performance energy consumption effect, meanwhile, more waves core cells have lower axial push-pull rigidity, avoid improving side to main structure
Excessive geological process is brought to rigidity.
(2) bending degree of more waves core cells can determine the yield force of buckling restrained brace, to make support
Yield force is controllable, and can achieve the effect that multistage is surrendered by using the core cell of differently curved degree.
(3) more waves core cells compare traditional straight panel core cell, the plastic strain amplitude under low cycling loads effect
It is smaller, that is, there is more stable low cycle fatigue property, buckling restrained brace is less susceptible to that the fatigues such as fracture occur under geological process
It destroys.
(4) packing material between traditional buckling restrained brace constraint element and core cell uses ordinary mortar, commonly
Mortar has stronger brittleness, and novel buckling restrained brace packing material uses cement emulsified asphalt mortar, with superior
Support, buffering, adjustment and the effect coordinated, allow constraint element is more stable must constrain core cell.
Detailed description of the invention
Fig. 1 is decomposition diagram of the invention.
Fig. 2 is stereoscopic schematic diagram of the invention.
Fig. 3 is side view of the invention.
Fig. 4 is sectional view of the invention.
Fig. 5 is 1 side view of straight panel core cell in the present invention.
Fig. 6 is 2 side view of small echo bent plate core cell in the present invention.
Fig. 7 is big 3 side view of wave bent plate core cell in the present invention.
Fig. 8 is using composite shock-absorbing system multistage surrender schematic diagram of the invention.
In figure: 1- straight panel core cell, 2- small echo bent plate core cell, the big wave bent plate core cell of 3-, 4- put more energy into
Rib, 5- limiting card, 6- cross tube, 7- cement emulsified asphalt mortar, 8- square end plate, 9- articulated joint, 10- node
Plate, 11- anchor slab.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Combined type buckling restrained brace with more surrender sections and more waves core cells, core cell is using five bendings
The different core plate of degree, including a straight panel core cell 1, two small echo bent plate core cells 2, two big wave bent plate core list
Member 3, core cell both ends are connect with square end plate 8, and straight panel core cell 1 is located at the plane geometry center of square end plate 8, two small echos
Bent plate core cell 2 is located at the two sides up and down of straight panel core cell 1, and two big wave bent plate core cell 3 is located at straight panel core list
The left and right sides of member 1.Core cell housing cross tube 6, cross tube 6 is with there are five partition, partition and core cells
It corresponds, cement emulsified asphalt mortar 7 is equipped between constraint element and core cell, there are confessions for cement emulsified asphalt mortar 7
The movable groove of ribbed stiffener 4, core cell outer layer covers silica gel plate, thickness take 2mm.Support passes through articulated joint 9 and main body knot
Gusset plate 10 on structure is connected, and the anchoring of anchor slab 11 on gusset plate 10 is on the body construction.
Straight panel core cell 1, small echo bent plate core cell 2 and big wave bent plate core cell 3 are using the low surrender of LY100 model
Point steel.Three kinds of core unit shafts are 3000mm to length, and sectional dimension is 80mm × 10mm, small echo bent plate core cell 2
Half-wave intermediate height 8mm, chord length 140mm, yield strength 50MPa, big 3 half-wave intermediate height 12mm of wave bent plate core cell, string
Long 140mm, yield strength 35MPa, 1 yield strength 100MPa of straight panel core cell, to realize three sections of surrenders.Cross tube
6, square end plate 8, articulated joint 9 and gusset plate 10 use Q420 model steel.
The manufacture craft of novel buckling restrained brace are as follows: by the integral prefabricated molding of core cell, weld ribbed stiffener 4, package
Silica gel plate, is inserted into cross tube 6, and filling concrete emulsified asphalt slurry 7 welds core cell and square end plate 8.
By finite element elasto-plastic time history analysis, traditional buckling restrained brace is -5.3% in small shake bottom offset aseismic ratio,
6.2% under middle shake, big shake lower 18.6%, the novel small shake bottom offset aseismic ratio 8.21% of buckling restrained brace, 15.8% under middle shake,
Big shake lower 22.5%.Traditional buckling restrained brace will increase main structure rigidity due to being difficult to consume energy under small shake, bring
Bigger geological process, aseismic ratio is in negative value sometimes, and novel buckling restrained brace then has preferable performance under medium and small shake.
The above are an exemplary embodiments of the invention, but implementation of the invention is without being limited thereto.
Claims (7)
1. the combined type buckling restrained brace with more surrender sections and more waves core cells, it is characterised in that: this is buckling-restrained
Support includes core cell, ribbed stiffener (4), limiting card (5), cross tube (6), cement emulsified asphalt mortar (7), square end plate
(8), articulated joint (9), gusset plate (10) and anchor slab (11)；Core cell is divided into straight panel core cell (1) and bent plate core list
Member, bent plate core cell include small echo bent plate core cell (2), big wave bent plate core cell (3)；One straight panel core cell
(1), two small echo bent plate core cells (2) and two big wave bent plate core cell (3) and square end plate (8) are integral prefabricated, straight panel
Core cell (1) is connected with square end plate (8) plane geometry center, and two small echo bent plate core cells (2) are located at straight panel core
The two sides up and down of heart unit (1), two big wave bent plate core cell (3) are located at the left and right sides of straight panel core cell (1)；
Ribbed stiffener (4) is located at core cell both ends, and limiting card (5) is located on straight panel core cell (1), for limiting core cell peace treaty
Occur to be displaced to axial between Shu Danyuan；Cross tube (6) is constraint element, and cement emulsified asphalt mortar (7) is core
Packing material between unit and constraint element；Support is connect by articulated joint (9) with gusset plate (10), and gusset plate (10) is logical
Anchor slab (11) is crossed to be connected with main structure.
2. the combined type buckling restrained brace with more surrender sections and more waves core cells according to claim 1,
Be characterized in that: the material of bent plate core cell is Low Yield Point Steel, and half wave number is no less than one, the ratio between chord length and arc length of half-wave
Greater than 0.1 and less than 1, half-wave intermediate height is not more than 50mm；Silicon is coated between core cell and cement emulsified asphalt mortar (7)
Offset plate takes 1-5mm as non-cohesive material, thickness.
3. the combined type buckling restrained brace with more surrender sections and more waves core cells according to claim 1,
Be characterized in that: buckling restrained brace includes the different bent plate core cell of multiple groups bending degree, and every group of bent plate core is about square end
Geometric center is symmetrical in plate (8) plane, prevents bent plate core cell from causing square end plate (8) to send out about the surrender of geometric center asymmetry
Raw torsion.
4. the combined type buckling restrained brace with more surrender sections and more waves core cells according to claim 1,
Be characterized in that: the material of core cell is not more than 230MPa, tensile strength 200MPa- according to Low Yield Point Steel, yield strength
400MPa, elongation are greater than 40%；The material of core cell is not more than 400MPa, tension according to common iron, yield strength
Intensity is not more than 530MPa, and elongation is not less than 16%.
5. the combined type buckling restrained brace with more surrender sections and more waves core cells according to claim 1,
Be characterized in that: constraint element setting partition, the number of partition is matched with core cell number, between constraint element and core cell
There are the cement for the movable groove of ribbed stiffener, in partition corresponding with straight panel core cell (1) for cement emulsified asphalt mortar (7)
There are holes corresponding with limiting card (5) for emulsified asphalt slurry (7).
6. the combined type buckling restrained brace with more surrender sections and more waves core cells according to claim 1,
Be characterized in that: by bolted splice, anchor slab (11) is anchored in main structure for the articulated joint (9) of support and gusset plate (10),
The connection between support and main structure is realized with this.
7. the combined type buckling restrained brace with more surrender sections and more waves core cells according to claim 1,
Be characterized in that: the yield strength of the packing material cement emulsified asphalt mortar (7) between constraint element and core cell is not less than
3MPa, and it is not higher than 10MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467227.1A CN109372144B (en) | 2018-12-03 | 2018-12-03 | Combined buckling restrained brace with multiple yield sections and multiple wave type core units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467227.1A CN109372144B (en) | 2018-12-03 | 2018-12-03 | Combined buckling restrained brace with multiple yield sections and multiple wave type core units |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109372144A true CN109372144A (en) | 2019-02-22 |
| CN109372144B CN109372144B (en) | 2020-08-28 |
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ID=65375328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811467227.1A Active CN109372144B (en) | 2018-12-03 | 2018-12-03 | Combined buckling restrained brace with multiple yield sections and multiple wave type core units |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700404A (en) * | 2019-09-24 | 2020-01-17 | 武汉科技大学 | Column-beam connecting assembly, column-beam connecting assembly and construction and installation method thereof |
| CN113529997A (en) * | 2021-07-21 | 2021-10-22 | 扬州大学 | Multistage energy consumption connecting piece |
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| US20050166487A1 (en) * | 2004-02-02 | 2005-08-04 | Chong-Shien Tsai | Shock-absorbing tie brace |
| CN2743614Y (en) * | 2004-08-20 | 2005-11-30 | 东南大学 | Composite friction damper having variable rigidity characteristics |
| CN102505772A (en) * | 2011-12-23 | 2012-06-20 | 卢锐 | Buckling restrained energy-consumption supporting device of building frame structure |
| CN205171722U (en) * | 2015-10-28 | 2016-04-20 | 同济大学 | One -way bucking of socket type restraint strutting arrangement |
| CN206971868U (en) * | 2017-07-04 | 2018-02-06 | 江苏力汇振控科技有限公司 | A kind of half waveform buckling restrained brace structure |
| CN108678507A (en) * | 2018-07-02 | 2018-10-19 | 沈阳建筑大学 | The Wasted-energy steel plate support construction of built-in circle mild-steel energy-consumption inner cylinder |
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2018
- 2018-12-03 CN CN201811467227.1A patent/CN109372144B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050166487A1 (en) * | 2004-02-02 | 2005-08-04 | Chong-Shien Tsai | Shock-absorbing tie brace |
| CN2743614Y (en) * | 2004-08-20 | 2005-11-30 | 东南大学 | Composite friction damper having variable rigidity characteristics |
| CN102505772A (en) * | 2011-12-23 | 2012-06-20 | 卢锐 | Buckling restrained energy-consumption supporting device of building frame structure |
| CN205171722U (en) * | 2015-10-28 | 2016-04-20 | 同济大学 | One -way bucking of socket type restraint strutting arrangement |
| CN206971868U (en) * | 2017-07-04 | 2018-02-06 | 江苏力汇振控科技有限公司 | A kind of half waveform buckling restrained brace structure |
| CN108678507A (en) * | 2018-07-02 | 2018-10-19 | 沈阳建筑大学 | The Wasted-energy steel plate support construction of built-in circle mild-steel energy-consumption inner cylinder |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700404A (en) * | 2019-09-24 | 2020-01-17 | 武汉科技大学 | Column-beam connecting assembly, column-beam connecting assembly and construction and installation method thereof |
| CN110700404B (en) * | 2019-09-24 | 2021-02-26 | 武汉科技大学 | Column-beam connecting assembly, column-beam connecting assembly and construction and installation method thereof |
| CN113529997A (en) * | 2021-07-21 | 2021-10-22 | 扬州大学 | Multistage energy consumption connecting piece |
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| Publication number | Publication date |
|---|---|
| CN109372144B (en) | 2020-08-28 |
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