CN109868897A - Assembly type RC frame structure with buckling-restrained braces laid based on interlayer rigidity - Google Patents
Assembly type RC frame structure with buckling-restrained braces laid based on interlayer rigidity Download PDFInfo
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Abstract
The invention relates to the field of structural engineering, in particular to an assembled RC frame structure system needing to be provided with buckling-restrained braces based on interlayer rigidity. The anti-buckling shock absorber comprises a main body structure of an assembled RC frame, a variable-section anti-buckling support structure and an SMA shock isolator; the variable-section buckling-restrained brace structure is a BRB structure, and the section size of a BRB kernel unit is determined according to the set target interlayer rigidity; the SMA shock isolator comprises SMA intelligent concrete in a beam and a column and an SMA rod assembly type self-resetting damper adopted by a column base. According to the method for optimizing the interlayer rigidity, the uniformity of the interlayer rigidity of each layer is realized by changing the size of the section of the inner core of the buckling-restrained brace; in addition, SMA materials are adopted in the easily damaged area of the structure, so that the structure can reset and repair itself when suffering earthquake action, and the structure is prevented from being damaged in the form of ' strong beam weak column ' and ' weak layer ', particularly the bottom layer becomes the weak layer '.
Description
Technical field
The present invention relates to structural engineering fields, and in particular to a kind of dress for needing to lay anti-buckling support based on storey stiffness
With formula RC frame structure system.
Background technique
Early in early 20th century, fabricated building just cause can people extensive concern, later in the states such as Britain and France
First meeting blank under the trial of family.Again because the advantages such as the construction speed of assembled architecture is fast and the cost of production is low are rapid
It comes in world-wide deployment.In time the past few decades, China's building trade flourishes, and is greatly promoted national economy
Growth.Currently, with the energy conservation and environmental awareness that the development and people of China's science and technology are gradually increased, assembled architecture by
Pay attention to great.Assembled architecture has standardized designs, the factorial production, prefabricated construction and integration maintenance etc. special
Point.Under " toughness town and country " and " building industrialization " background, important carrier of the reinforced concrete frame structure as city function,
It is the preferred structural system for undertaking the multilayer public building of important social function, structure type is also suitble to " prefabrication and assembly construction " skill
Art.With the continuous development of science and technology, intelligent material systems and structures made of intellectual material merges were used civil engineering
Cheng Zhong not only has powerful attraction, also has distinct revolutionary character.Wherein, SMA is with its own with perceptibility, judgement
Property and self-adaptation, high damping, fatigue resistance and be easy to the materials such as concrete, steel merge characteristic start in building work
Journey field gets more and more people's extensive concerning.It can be used for the control to structural vibration, structural crack and damage effectively supervised
Control.
It will consider that the anti-seismic performance of structure, structure also need to consider wind resistance when designing in the building for area's construction of providing fortification against earthquakes
Performance.Bracing members frame structure is from heavy and light, and under geological process, geological process power suffered by structure is relatively small, therefore wide
General the more of area that are applied to provide fortification against earthquakes, in high-level structure.But traditional bracing members often occur under middle shake or big shake effect
Overall collapse or local buckling cause the ductility of structure and energy dissipation capacity to significantly reduce, influence the seismic seeurity of structure, be anti-
Only unstability or buckling, the section for generally requiring to increase support is to meet design requirement, to reduce its economy.Therefore, state
Component --- the anti-buckling support of without flexing when outer some researchers develop a kind of compression.At present its Japan, the U.S.,
TaiWan, China is widely used, China's Mainland research still in its infancy.
Nowadays, with the development of science and technology with the continuous promotion of execution conditions, in original a large amount of assembled RC frame base
On plinth, build mostly all using assembled RC frame --- BRB structure adds anti-buckling support on the body construction both at home and abroad
Structure absorbs geological process bring energy, forms seismic energy dissipation structure by anti-buckling support as main energy consumption position.
This structural system becomes the trend of construction multi- story and high- rise building.Tier building mostly domestic at present all uses anti-buckling support
Structure, the overall stiffness that can improve structure realizes the purpose of energy-dissipating and shock-absorbing, cannot be according to but when specifically laying anti-buckling support
The requirement independently set up defences is set according to actual conditions target storey stiffness.
Summary of the invention
The technical problem to be solved by the present invention is to tier buildings mostly domestic at present all to use buckling-resistant support structure, energy
The overall stiffness for improving structure realizes the purpose of energy-dissipating and shock-absorbing, cannot be according to independently setting but when specifically laying anti-buckling support
Anti- requirement is set according to actual conditions target storey stiffness.
To solve the above problems, method of the present invention according to optimization storey stiffness, is cut by changing anti-buckling support kernel
The size in face is consistent to realize each layer storey stiffness.In addition, SMA material is used in structure frangible regions, so that structure is meeting with
By when geological process can self reset, self-regeneration, realize avoid structure occur " the weak column of brutal " and " weak floor, especially
Bottom become weak floor " failure mode generation.
To achieve the above object, the present invention is realized especially by following technical scheme, and one kind needing cloth based on storey stiffness
It sets up defences the assembled RC frame structure of buckling support, the anti-buckling support of main structure, variable cross-section including assembled RC frame
Structure, SMA isolator；Wherein, the buckling-resistant support structure of variable cross-section is BRB structure, the sectional dimension of BRB kernel unit according to
Depending on setting target storey stiffness；SMA isolator includes the SMA stick of the SMA intelligent concrete and suspension column use in Liang Yuzhu
Assembled re-centring damper.
Accentric support or V-shape support can be used in supporting way, in structural system, anti-buckling support is added, as damage
Wound member absorbs most seismic energies.Anti-buckling support not only increases the lateral rigidity of structure, and with excellent stagnant
Return characteristic and good low cycle fatigue property, it is suppressed that the phenomenon of buckling of common support can more absorb and dissipation earthquake is defeated
The shock resistance ability for entering to improve frame to the energy of structure, there is stronger and more stable energy dissipation capacity in macroseism.Support structure
Part can protect other components from destroying, and greatly after shake, can be convenient the support of replacement damage.
When by geological process, more lower easier accumulation shears the number of plies traditional RC frame structure, leads to shearing not
It is uniformly distributed, the displacement that non-uniform relative storey displacement, especially bottom often occurs is maximum, weak floor easy to form.So
Most building often collapses because bottom destroys.It, can be according to the actual situation using the method for determining storey stiffness demand
It needs to set target storey stiffness, the increased rigidity of each layer is undertaken with changing the sectional dimension of BRB kernel unit, makes interlayer
Consistent displacement occurs, realizes whole energy consumption.
Further, a kind of calculation method of BRB kernel unit sectional dimension is obtained, it is assumed that cut suffered by every layer of conventional frame
Power is F1、F2、F3, every layer of relative storey displacement is d1、d2、d3.It is assumed that bottom rigidity is k- Δ k, remaining each stiffness layer is k, and earthquake is total
Shearing is V, then:
d3=F3/k3=3V/6k
d2=(F2+F3)/k2=5V/6k
d1=(F1+F2+F3)/k1=V/k1=V/k- Δ k
BRB is laid by the method for determining storey stiffness, can independently set target storey stiffness according to actual needs,
Enabling every layer of generation same displacement is d, then the increased rigidity k* of each layer is undertaken by the BRB kernel unit of each layer variable cross-section, so that
Consistent displacement occurs for frame structure, and avoiding leads to integrally-built collapse because bottom destroys.
Then k*1=V/d-k+ Δ k
k*2=5V/6d-k
k*3=3V/6d-k.
The different increased rigidity of interlayer are different, so the sectional dimension of BRB used in each layer is also different, in BRB
The variable cross-section form of nuclear unit consumes the different increase rigidity of each layer.Pushover analysis is carried out to frame structure first, is obtained
Relative storey displacement and interlaminar shear of the maximum story drift when reaching 1/50, be divided by and obtain storey stiffness；Property is based on meeting
Under the theory of energy antidetonation, the demand of owner and the risk setting target relative storey displacement value of earthquake are considered；Recycle pushover
It analyzes the interlaminar shear obtained and obtains target storey stiffness divided by the target relative storey displacement value, subtract existing storey stiffness and obtain
Increased rigidity is needed, the sectional dimension of BRB kernel unit that need to be added further is obtained.
Further, the section of BRB includes inner core component, cushion block, angle steel and high-strength bolt；Inner core component is stauros
Structure, periphery are angle steel, and the extending part of inner core component connects cushion block, and cushion block passes through high-strength bolt and Bolted angle connection.
Further, it is connected by the way of hinged or embedding between buckling-resistant support structure and main structure.
Further, buckling-resistant support structure is connect by the way of embedding with main structure, and node connecting structure includes
Pre-buried gusset plate, anti-collision rubber pad, peg, embedded part, SMA intelligent concrete, bracket；The end of buckling-resistant support structure connects
Gusset plate is connect, gusset plate extension is embedded in inside the beam of concrete, and peg is arranged with transmission force in embedded part；Gusset plate and coagulation
Anti-collision rubber pad is set between the column of soil, even if to guarantee that gusset plate will not be with when biggish lateral deformation occurs for structure
Column is in contact；Bracket is laid under beam-ends, may make when beam destroys, remains to provide support for gusset plate, is unlikely to anti-
Buckling support misplaces because of the damage of beam to be caused to fail；SMA intelligent concrete is poured in beam-ends and styletable, both can control crack
Development, carry out self-regeneration to crack has been carried out, and a buffering can be formed between pre-buried gusset plate and body frame trestle,
When gusset plate is displaced sideways, the Self-resetting property of SMA material can be played, reduces the collision to frame column.
Further, SMA stick assembled re-centring damper is used in suspension column, such as patent CN108316507 " SMA stick dress
With formula re-centring damper " disclosed in structure.
Further, SMA stick assembled re-centring damper is mounted at suspension column, and in surrounding supporting anti-collision rubber,
To mitigate destruction of the geological process to exterior.
Further, SMA intelligent concrete or ECC material are used in the expection plastic hinge region of beam and column, at beam column end
Node area uses SMA intelligent concrete, and the development of the preferable control critical eigenvalue of energy effectively inhibits further expanding for damage.
SMA is transformed concrete component, and performance is greatly improved compared with conventional concrete component: axial direction can be improved
Anti-pressure ability reduces plastic deformation, prevents the generation and development of microcrack.By the control to SMA, reparation can also have been realized
The crack of generation.Therefore it is poured in the expected plastic hinge region of beam column using SMA intelligent concrete, other positions pour common coagulation
Soil.SMA intelligent concrete has the function of that the antidetonation survivability of structure can be improved from perception, selfreparing, increase structural damping etc.
Can, realize structure, control integration.Therefore, being prevented and reduced natural disasters in construction projects using SMA intelligent concrete is one has very much
The research direction of value.
When carrying out concreting, formwork is carried out in the position of expected plastic hinge region and beam column end, then pours SMA intelligence
Energy concrete, other positions pour normal concrete.
ECC material also can be used instead of SMA intelligent concrete in the expected plastic hinge region of beam column, stitched using ECC material steady more
The characteristics of state cracks preferably solves conventional concrete due to many disadvantages caused by fragility, weak draftability, realizes toughness
Reinforce.
The present invention can set target storey stiffness according to different requirements, in the case where determining storey stiffness demand, lead to
It crosses and acts on every layer of structure increased different-stiffness on BRB, realize that the increased rigidity of each layer needs in the form of the BRB of variable cross-section
It asks.When anti-buckling support is connect with beam, using embedding connection, Anti-collision materials and SMS material is disposed to ensure that anti-buckling branch
Support does not collide with column, adds bracket and makes anti-buckling support more stable.Guarantee that consistent displacement occurs for interlayer, realizes whole
Energy consumption, improves the intensity of structure.Target of setting up defences can be independently set, the Seismic Philosophy based on condition is met.
SMA damper is used in suspension column, reduces geological process in the transmitting of interlayer, while playing the good elasticity of SMA certainly
Reset property enables isolator and structure Self-resetting and progress self-regeneration when by geological process, manually adds after reducing shake
Solid project amount.
SMA intelligent concrete is used in the expected plastic hinge region of beam column and the fragile bad block in beam column end, it is intelligently mixed to give full play to SMA
Axial compression resistance ability can be improved in solidifying soil, reduces plastic deformation, prevents the generation and development of microcrack.By the control to SMA,
It can also realize the crack repaired and generated.
The beneficial effects of the present invention are:
(1) the target storey stiffness of multilayered structure can be set according to actual needs, and adds the anti-buckling support of variable cross-section
It realizes the requirement for increasing rigidity, so that whole consistent displacement occurs for structure, realizes whole energy consumption；Improve the entirety of structure
Rigidity, avoids the failure mode of " the weak column of brutal " and " weak floor, especially bottom become weak floor ", and realization can independently be set
It sets up defences target, meets the Seismic Design Thought based on condition.
(2) SMA damper being used in suspension column, reduction may be from the geological process power of bottom to the transmitting of superstructure, and
The function of SMA material Self-resetting can be played, so that SMA damper can be carried out Self-resetting when being subjected to displacement.
(3) it at expected plastic hinge region and beam column end destructible position, is poured, can effectively be inhibited using SMA intelligent concrete
The development in crack and the self-regeneration for realizing crack.
(4) the assembled RC frame structure assemblage for needing to lay anti-buckling support based on storey stiffness that the present invention uses
The thought for having used damping, shock insulation is closed, so that structure has higher globality and stability.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.It is clear that the accompanying drawings in the following description is of the invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is general structure frame figure；
Fig. 2 is anti-buckling support laying form figure；
Fig. 3 is RC frame by shear diagram；
Fig. 4 is the relative storey displacement figure of RC frame；
Fig. 5 is the consistent displacement diagram of RC frame interlayer；
Fig. 6 is anti-buckling support kernel side cross-sectional view (by being followed successively by one layer of side view, two layers of side view, three from left to right
Layer side view)；
Fig. 7 is anti-buckling support kernel cross sectional elevation (by being followed successively by one layer of front view, two layers of front view, three from left to right
Layer front view)；
Fig. 8 is BRB section form figure；
Fig. 9 is support node connection figure；
Figure 10 is SMA stick assembled re-centring damper structure chart；
Figure 11 is damper installation diagram；
Figure 12 is expected plastic hinge region figure；
Figure 13 is the sectional dimension design flow diagram of BRB kernel unit；
In figure, main structure 1, pre-buried gusset plate 11, anti-collision rubber pad 12, peg 13, embedded part 14, SMA are intelligently mixed
Solidifying soil 15, bracket 16, beam 17, column 18, expected plastic hinge region 19, node area 20, buckling-resistant support structure 2, inner core component 21, pad
Block 22, angle steel 23 and high-strength bolt 24, SMA stick assembled re-centring damper 3, anti-collision rubber 4.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment 1:
A kind of assembled RC frame structure needing to lay anti-buckling support based on storey stiffness, as shown in Figure 1, including dress
Buckling-resistant support structure 2, the SMA isolator of main structure 1, variable cross-section with formula RC frame；Wherein, the anti-buckling branch of variable cross-section
Support structure is BRB structure, and the sectional dimension of BRB kernel unit is depending on setting target storey stiffness；SMA isolator is included in
The SMA stick assembled re-centring damper 3 that SMA intelligent concrete 15 and suspension column in Liang Yuzhu use.
Antidetonation, damping, shock insulation theory are melted into a whole by the system, and the anti-buckling support for adding variable cross-section improves structure
Rigidity and overall stability avoid bottom generation concentration and destroy, overcome traditional structure so that uniform destruction occurs for interlayer
Incident " the weak column of brutal " destroys and " weak floor " failure mode.The function of Self-resetting is realized using SMA novel intelligent material
Can, so that structure can be carried out self-regeneration when by geological process, it is suppressed that the further development of destroyed area.
Accentric support or V-shape support can be used in supporting way, as shown in Fig. 2, it is anti-to add V-shape in structural system
Buckling support absorbs most seismic energies as damage member.It is anti-buckling to support the lateral rigidity for not only increasing structure,
And there is excellent hysteretic characteristic and good low cycle fatigue property, it is suppressed that the phenomenon of buckling of common support, it can be more
It absorbs and dissipation Seismic input is to the energy of structure, improve the shock resistance ability of frame, have in macroseism stronger and more stable
Energy dissipation capacity.Supporting member can protect other components from destroying, and greatly after shake, can be convenient the support of replacement damage.
When by geological process, more lower easier accumulation shears the number of plies traditional RC frame structure, leads to shearing not
It is uniformly distributed, the displacement that non-uniform relative storey displacement, especially bottom often occurs is maximum, weak floor easy to form.So
Most building often collapses because bottom destroys.It, can be according to the actual situation using the method for determining storey stiffness demand
It needs to set target storey stiffness, the increased rigidity of each layer is undertaken with changing the sectional dimension of BRB kernel unit, makes interlayer
Consistent displacement occurs, realizes whole energy consumption.
A kind of calculation method of BRB kernel unit sectional dimension, as shown in Figure 3,4, it is assumed that cut suffered by every layer of conventional frame
Power is F1、F2、F3, every layer of relative storey displacement is d1、d2、d3.It is assumed that bottom rigidity is k- Δ k, remaining each stiffness layer is k, and earthquake is total
Shearing is V, then:
d3=F3/k3=3V/6k
d2=(F2+F3)/k2=5V/6k
d1=(F1+F2+F3)/k1=V/k1=V/k- Δ k
As shown in figure 5, laying by the method for determining storey stiffness to BRB, mesh can be independently set according to actual needs
Storey stiffness is marked, enabling every layer of generation same displacement is d, then the increased rigidity k* of each layer is by vouching in the BRB of each layer variable cross-section
Member undertakes, so that consistent displacement occurs for frame structure, avoiding leads to integrally-built collapse because bottom destroys.
Then k*1=V/d-k+ Δ k
k*2=5V/6d-k
k*3=3V/6d-k.
The different increased rigidity of interlayer are different, so the sectional dimension of BRB used in each layer is also different, in BRB
The variable cross-section form of nuclear unit consumes the different increase rigidity of each layer, and specific calculation process is as shown in figure 13, first to frame
Frame structure carries out pushover analysis, obtains relative storey displacement when maximum story drift reaches 1/50 and interlaminar shear, is divided by
Obtain storey stiffness；In the case where meeting the theory based on performance antidetonation, the demand of owner and the risk setting target of earthquake are considered
Relative storey displacement value；The interlaminar shear for recycling pushover analysis to obtain is rigid divided by target relative storey displacement value acquisition target interlayer
Degree subtracts existing storey stiffness and obtains needing increased rigidity, further obtains the section ruler of BRB kernel unit that need to be added
It is very little.Show that the variable cross-section form of every layer of BRB kernel unit is as shown in Figure 6, Figure 7 according to target storey stiffness.
As shown in figure 8, the section of BRB includes inner core component 21, cushion block 22, angle steel 23 and high-strength bolt 24；Inner core component
21 be cross structure, and periphery is angle steel 23, and the extending part of inner core component connects cushion block 22, cushion block 22 by high-strength bolt 24 with
Angle steel 23 connects.
The present invention combines the anti-buckling support of restricted type using four angle steel, and the peripheral constraint component of the anti-buckling support of assembled is logical
Often gusset plate is assembled by bolt or other connecting components by multiple components to form.Inner core component can be transported to peripheral member
Scene carries out assembly again, avoids site welding and detection, easy for installation and economical.Its great advantage be batch production processing it is quick and
Precision is high, overall performance more lightness, is easy to replace after shaking.
As shown in figure 9, buckling-resistant support structure 2 is connect by the way of embedding with main structure, node connecting structure packet
Include pre-buried gusset plate 11, anti-collision rubber pad 12, peg 13, embedded part 14, SMA intelligent concrete 15, bracket 16；Anti-buckling branch
The end connecting node plate 11 of support structure 2, gusset plate extension are embedded in inside the beam 17 of concrete, and peg is arranged in embedded part 14
With transmission force；Anti-collision rubber pad 12 is set between gusset plate and the column 18 of concrete, even if to guarantee when structure generation is biggish
When lateral deformation, gusset plate will not be in contact with column；Bracket 16 is laid under 17 end of beam, may make when beam destroys,
It remains to provide support for gusset plate, is unlikely to anti-buckling support and misplaces because of the damage of beam and cause to fail；It is poured in beam-ends and styletable
SMA intelligent concrete 15 is built, both can control the development in crack, carries out self-regeneration to crack has been carried out, and can be in pre-buried section
A buffering is formed between contact plate and body frame trestle, when gusset plate is displaced sideways, can play the Self-resetting of SMA material
Property reduces the collision to frame column.
As shown in Figure 10, SMA stick assembled re-centring damper is used in suspension column, such as patent CN108316507 " SMA stick
Assembled re-centring damper " disclosed in structure.
SMA stick assembled re-centring damper both can solve conventional damper, and structure is complicated, the stability of material and resistance to
There is the problem of larger residual deformation to overcome conventional SMA damper silk material diameter again after long property difference and shake smaller, it has not been convenient to it installs,
The yield force of generation is smaller, easy fracture and the shortcomings that take normal update.The damper has structure simple, and shock resistance is strong, prolongs
Property performance is good, the superperformances such as stability height.
As shown in figure 11, SMA stick assembled re-centring damper 3 is mounted at suspension column, and in surrounding supporting anti-collision rubber
Plate 4, to mitigate destruction of the geological process to exterior.
As shown in figure 12, SMA intelligent concrete is used in the expection plastic hinge region 19 of beam and column, in the node area at beam column end
20 use SMA intelligent concrete, and the development of the preferable control critical eigenvalue of energy effectively inhibits further expanding for damage.
SMA is transformed concrete component, and performance is greatly improved compared with conventional concrete component: axial direction can be improved
Anti-pressure ability reduces plastic deformation, prevents the generation and development of microcrack.By the control to SMA, reparation can also have been realized
The crack of generation.Therefore it is poured in the expected plastic hinge region of beam column using SMA intelligent concrete, other positions pour common coagulation
Soil.SMA intelligent concrete has the function of that the antidetonation survivability of structure can be improved from perception, selfreparing, increase structural damping etc.
Can, realize structure, control integration.Therefore, being prevented and reduced natural disasters in construction projects using SMA intelligent concrete is one has very much
The research direction of value.
When carrying out concreting, formwork is carried out in the position of expected plastic hinge region and beam column end, then pours SMA intelligence
Energy concrete, other positions pour normal concrete.
Embodiment 2:
ECC material also can be used instead of SMA intelligent concrete in the expected plastic hinge region of beam column, stitched using ECC material steady more
The characteristics of state cracks preferably solves conventional concrete due to many disadvantages caused by fragility, weak draftability, realizes toughness
Reinforce.
Remaining is same as Example 1.
Embodiment 3:
It is connected by the way of hinged between buckling-resistant support structure and main structure.
Remaining is same as Example 1.
The present invention is that can set mesh according to actual needs by anti-buckling support is laid by way of determining storey stiffness needs
Storey stiffness is marked, makes RC frame that the consistent displacement of interlayer occur, is unlikely to occur in geological process flowering structure system because bottom is broken
Bad excessive and generation total Collapse.It is poured in the expected frangible regions such as plastic hinge region and beam column end using SMA intelligent concrete
It builds, other regions are poured using normal concrete, can play SMA material Self-resetting, the performance of self-regeneration inhibits destruction area
The further development in domain crack, and it is able to achieve the self-regeneration in crack.SMA damper is used in suspension column, is reduced from bottom
Transmitting of the geological process power to upper layer.It is that the one kind proposed based on the thought of multilayer interlayer stiffness optimization and energy-dissipating and shock-absorbing is based on layer
Between rigidity need to lay the assembled RC frame structure system of anti-buckling support.
Claims (10)
1. needing to lay the assembled RC frame structure of anti-buckling support based on storey stiffness, it is characterised in that: including assembled
The main structure of RC frame, the buckling-resistant support structure of variable cross-section, SMA isolator；Wherein, the buckling-resistant support structure of variable cross-section
For BRB structure, the sectional dimension of BRB kernel unit is depending on setting target storey stiffness；SMA isolator is included in Liang Yuzhu
In SMA intelligent concrete and suspension column use SMA stick assembled re-centring damper.
2. a kind of assembled RC frame knot for needing to lay anti-buckling support based on storey stiffness according to claim 1
Structure, it is characterised in that: the calculation method of BRB kernel unit sectional dimension is as follows:
It is assumed that shearing suffered by every layer of conventional frame is F1、F2、F3, every layer of relative storey displacement is d1、d2、d3.It is assumed that bottom rigidity is k-
Δ k, remaining each stiffness layer are k, and it is V that earthquake, which always shears, then:
d3=F3/k3=3V/6k
d2=(F2+F3)/k2=5V/6k
d1=(F1+F2+F3)/k1=V/k1=V/k- Δ k
BRB is laid by the method for determining storey stiffness, target storey stiffness is independently set according to actual needs, enables every layer
It is d that same displacement, which occurs, then the increased rigidity k* of each layer is undertaken by the BRB kernel unit of each layer variable cross-section, so that frame knot
Consistent displacement occurs for structure, avoid because bottom destroys cause it is integrally-built collapse, then:
k*1=V/d-k+ Δ k
k*2=5V/6d-k
k*3=3V/6d-k.
3. a kind of assembled RC frame knot for needing to lay anti-buckling support based on storey stiffness according to claim 1
Structure, it is characterised in that: BRB kernel unit sectional dimension calculates as follows: carrying out pushover analysis to frame structure first, obtains
Relative storey displacement and interlaminar shear when maximum story drift reaches 1/50, are divided by and obtain storey stiffness；Meeting based on performance
Under the theory of antidetonation, the demand of owner and the risk setting target relative storey displacement value of earthquake are considered；Recycle pushover points
It analyses the interlaminar shear obtained and obtains target storey stiffness divided by the target relative storey displacement value, subtracting existing storey stiffness is needed
Increased rigidity further obtains the sectional dimension of BRB kernel unit that need to be added.
4. a kind of assembled RC frame knot for needing to lay anti-buckling support based on storey stiffness according to claim 1
Structure, it is characterised in that: the section of BRB includes inner core component, cushion block, angle steel and high-strength bolt；Inner core component is cross structure, outside
It encloses for angle steel, the extending part of inner core component connects cushion block, and cushion block passes through high-strength bolt and Bolted angle connection.
5. a kind of assembled RC frame knot for needing to lay anti-buckling support based on storey stiffness according to claim 1
Structure, it is characterised in that: connected by the way of hinged or embedding between buckling-resistant support structure and main structure.
6. a kind of assembled RC frame for needing to lay anti-buckling support based on storey stiffness according to claim 1 or 5
Structure, it is characterised in that: connected by the way of embedding between buckling-resistant support structure and main structure, node connecting structure packet
Include pre-buried gusset plate, anti-collision rubber pad, peg, embedded part, SMA intelligent concrete, bracket；The end of buckling-resistant support structure
Connecting node plate, gusset plate extension are embedded in inside the beam of concrete, and peg is arranged in embedded part；The column of gusset plate and concrete
Between be arranged anti-collision rubber pad；Bracket is laid under beam-ends；SMA intelligent concrete is poured in beam-ends and styletable.
7. a kind of assembled RC frame knot for needing to lay anti-buckling support based on storey stiffness according to claim 1
Structure, it is characterised in that: the supporting way of buckling-resistant support structure is supported using accentric support or V-shape.
8. a kind of assembled RC frame knot for needing to lay anti-buckling support based on storey stiffness according to claim 1
Structure, it is characterised in that: use SMA stick assembled re-centring damper in suspension column.
9. a kind of assembled RC frame knot for needing to lay anti-buckling support based on storey stiffness according to claim 7
Structure, it is characterised in that: SMA stick assembled re-centring damper is mounted at suspension column, and in surrounding supporting anti-collision rubber.
10. a kind of assembled RC frame knot for needing to lay anti-buckling support based on storey stiffness according to claim 1
Structure, it is characterised in that: use SMA intelligent concrete or ECC material in the expection plastic hinge region of beam and column, the node at beam column end
Area uses SMA intelligent concrete.
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| CN201910192800.0A CN109868897A (en) | 2019-03-14 | 2019-03-14 | Assembly type RC frame structure with buckling-restrained braces laid based on interlayer rigidity |
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| CN115405004A (en) * | 2022-05-07 | 2022-11-29 | 浙江省交通运输科学研究院 | Shear-stretch hybrid type segmented buckling-preventing energy-consuming support and manufacturing process |
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