CN208501947U - A kind of more bushing type FRP reset muscle self reset curvature-prevention support components - Google Patents
A kind of more bushing type FRP reset muscle self reset curvature-prevention support components Download PDFInfo
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- CN208501947U CN208501947U CN201820874319.0U CN201820874319U CN208501947U CN 208501947 U CN208501947 U CN 208501947U CN 201820874319 U CN201820874319 U CN 201820874319U CN 208501947 U CN208501947 U CN 208501947U
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- reset
- end plate
- curvature
- inner sleeve
- prevention support
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Abstract
A kind of more bushing type FRP reset muscle self reset curvature-prevention support components, it is related to a kind of curvature-prevention support component, to solve the problems, such as that current self reset curvature-prevention support component cost is high, processing and manufacturing precision is high and structure is complicated.The utility model includes curvature-prevention support component and Self-resetting system；Curvature-prevention support component includes kernel unit and inner sleeve；Inner sleeve is sleeved in kernel unit, and concrete layer is filled between inner sleeve and kernel unit；Self-resetting system includes outer tube, middle sleeve, first end plate and the second end plate；Outer tube, middle sleeve and inner sleeve ecto-entad are successively set in together, first end plate is separately positioned on the both ends of outer tube with the second end plate and is connected by resetting muscle, kernel unit is stretched out from first end plate and the second end plate, and the side of neighbouring second end plate is affixed with kernel unit respectively on the side of first end plate and middle sleeve on outer tube.The utility model is suitable for building field.
Description
Technical field
The utility model relates to a kind of curvature-prevention support components, and in particular to a kind of more bushing type FRP reset muscle Self-resettings
Curvature-prevention support component.
Background technique
Anti-buckling support (Buckling-Restrained Brace, BRB) component be a kind of extraordinary dissipative member and
Lateral resisting structure component, but it is by the elastoplasticity of steel come dissipation energy, this inevitably leads to this class formation and exists
Biggish lateral deformation and residual deformation can be generated when meeting with big shake.With the development and progress of society, people are to building function
Demand it is also more and more diversified, to deformation of the structure under geological process, higher requirements are also raised.Some are more important
Structural elements do not allow that inelastic deformation etc. occurs, this just needs the maximum distortion and residual deformation of strict control structure, therefore
To the deformation characteristic of the supporting member in structural system, higher requirements are also raised.If installation Self-resetting dress on BRB component
It sets, forms self reset curvature-prevention support component, the residual deformation of self reset curvature-prevention support component is substantially reduced compared with BRB.
The research of Self-resetting support still has some problems.Self-resetting friction energy-dissipating type is supported, consume energy mechanism
Using friction energy-dissipating, the energy dissipation capacity of support will affect after rubbing surface aging；Another restrict such support the problem of be
The problem of selecting of muscle material is resetted, the ideal muscle material that resets should have preferable deformability, preferable durability, anchoring
Convenient and relatively reasonable cost, and the material in engineering is difficult to meet these conditions simultaneously.
The advantages of self reset curvature-prevention support combines Self-resetting system and anti-buckling support, there is good energy dissipation capacity,
The anti-buckling biggish residual deformation of support can be substantially eliminated simultaneously, and there is good energy consumption reset effect.It is bent in addition, Self-resetting is anti-
The construction of song support is reasonable, and mechanics principle is clear, has good research and future in engineering applications, can satisfy to structure big
The requirement for the owner that residual deformation under geological process has higher requirements has caused the research of numerous scholars since its appearance
Interest.
2012, Miller et al. used the self reset curvature-prevention support structure measure of double steel pipe constraint type, using shape
Shape memory alloys muscle has preferably reset capability, shape memory as a kind of self reset curvature-prevention support of materials synthesis is resetted
Alloy has extraordinary elastic deformability, but the performance of marmem is affected by temperature obviously, and cost is higher.
Liu Lu et al. proposes a kind of novel all steel self reset curvature-prevention support, becomes to control the remaining of anti-buckling support
Shape, they reset muscle using relatively conventional prestress wire.Such support has preferable reset capability.All steel
Self reset curvature-prevention support structure form is complex, and processing and fabricating required precision is higher.
Zeng Peng et al. has studied the novel all steel Self-resetting buckling of one kind about still using prestress wire as muscle is resetted
Bundle branch support.For the restriction for overcoming prestress wire extreme elastic to deform, they use setting for two beam presstressed reinforcing steels of series connection
Meter construction, twice of the single beam presstressed reinforcing steel of the axial deformation for supporting Self-resetting, and numerical simulation has been carried out, but support
Structural form is still complicated.
Utility model content
Current self reset curvature-prevention support component cost is high, processing and manufacturing precision is high and knot in order to solve for the utility model
The problem of structure complexity, and a kind of more bushing type FRP reset muscle self reset curvature-prevention support components are provided.
The utility model adopts the technical scheme that solve above-mentioned technical problem:
It includes curvature-prevention support component and Self-resetting system；
Curvature-prevention support component includes kernel unit and inner sleeve；
Inner sleeve is sleeved in kernel unit, and concrete layer is filled between inner sleeve and kernel unit；
Self-resetting system includes outer tube, middle sleeve, first end plate and the second end plate；
Outer tube, middle sleeve and inner sleeve ecto-entad are successively set in together, and first end plate and the second end plate are set respectively
It sets the both ends in outer tube and is connected by resetting muscle, kernel unit is stretched out from first end plate and the second end plate, adjacent on outer tube
The side of neighbouring second end plate is affixed with kernel unit respectively on the side of nearly first end plate and middle sleeve.
The utility model has the advantages that compared with prior art
One, it since the constraint element on the utility model curvature-prevention support component uses concrete layer and inner sleeve, prevents
It resets muscle and generates bending, stress suffered by concrete layer and inner sleeve is smaller, can provide preferable constraint, anti-buckling branch for support
Support component can be used as the energy dissipating portion of the utility model support.
Two, the difference of the stress of the utility model reset muscle and kernel unit is bigger, and the reset capability in support is stronger,
Therefore in bearing capacity range energy, the utility model can preferably be resetted in biggish stress, such as encounter earthquake, have compared with favourable opposition
There is good recovery capability in the case where hitting power.
Three, the characteristics of the utility model has structure simple, is easily worked implementation.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model；
Fig. 2 is the left view of Fig. 1；
Fig. 3 is the right view of Fig. 1；
Fig. 4 is the A-A cross-sectional view of Fig. 1；
Fig. 5 is the schematic diagram of kernel unit 1；
Fig. 6 is the schematic diagram of middle sleeve 3；
Fig. 7 is the left view of Fig. 6；
Fig. 8 is the schematic diagram of inner sleeve 4；
Fig. 9 is the left view of Fig. 8；
Figure 10 is the Stress Map of kernel unit 1；
Figure 11 is the Stress Map of concrete layer 8；
Figure 12 is the Stress Map of inner sleeve 4；
Figure 13 is the Stress Map of middle sleeve 3；
Figure 14 is the Stress Map of outer tube；
Figure 15 is the Stress Map for resetting muscle 7；
Figure 16 is the Stress Map of first end plate 5；
Figure 17 is the Stress Map of the second end plate 6；
Figure 18 is the hysteresis loop of Self-resetting system and by force-responsive comparison diagram；
(arrow direction is stress side to the geometrical relationship figure of structure in figure when Figure 19 is the utility model stress deformation
To).
Specific embodiment
Specific embodiment 1: illustrate present embodiment in conjunction with FIG. 1 to FIG. 4, present embodiment it include anti-buckling branch
Support component and Self-resetting system；
Curvature-prevention support component includes kernel unit 1 and inner sleeve 4；
Inner sleeve 4 is sleeved in kernel unit 1, and concrete layer 8 is filled between inner sleeve 4 and kernel unit 1；
Self-resetting system includes outer tube 2, middle sleeve 3, first end plate 5 and the second end plate 6；
Outer tube 2, middle sleeve 3 and 4 ecto-entad of inner sleeve are successively set in together, first end plate 5 and the second end plate 6
It is separately positioned on the both ends of outer tube 2 and is connected by resetting muscle 7, kernel unit 1 is stretched from first end plate 5 and the second end plate 6
Out, on outer tube 2 on the side of neighbouring first end plate 5 and middle sleeve 3 side of neighbouring second end plate 6 respectively with kernel unit 1
It is affixed.
The material for resetting muscle 7 can select basalt fibre FRP, basalt fibre, glass fibre FRP or aramid fiber
Any one of FRP.
Specific embodiment 2: illustrate present embodiment in conjunction with Fig. 1 and Fig. 5, kernel unit 1 described in present embodiment
Amplify body II1-3 including strip connector 1-1, end amplification body I1-2 and end；
End amplification body I1-2 and end amplification body II1-3 is respectively and fixedly connected to the both ends of strip connector 1-1；
End amplification body I1-2 and end amplification body II1-3 are respectively protruding into inner sleeve 4, and are corresponded from first end
Plate 5 and the second end plate 6 stretch out, extend into the end amplification body I1-2 and end amplification body II1-3 of 4 part of inner sleeve respectively with it is interior
It is filled with concrete layer 8 between casing 4, concrete layer 8 is filled between strip connector 1-1 and inner sleeve 4；
Body I1-2 is amplified in end and the side of first end plate 5 neighbouring on outer tube 2 is affixed, end amplification body II1-3 with it is interior
The side of neighbouring second end plate 6 is affixed on casing 4.
Other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 3: illustrating present embodiment in conjunction with Fig. 4 and Fig. 5, reset muscle 7 described in present embodiment is
Line-styled band steel.Other compositions and connection relationship are identical with embodiment two.
Specific embodiment 4: illustrating present embodiment in conjunction with Fig. 2 and Fig. 3, body is amplified in end described in present embodiment
I1-2 and end amplification body II1-3 are welded by the plurality of plates that section is " ten " font.
Other compositions and connection relationship are the same as the specific implementation mode 3.
Specific embodiment 5: illustrate present embodiment in conjunction with Fig. 6 and Fig. 7, the end of middle sleeve 3 described in present embodiment
Portion is machined with multiple notch 3-1, and affixed end amplification body I1-2 is inserted into notch 3-1 with outer tube 2.
Other compositions and connection relationship are identical as specific embodiment four.
Specific embodiment 6: illustrate present embodiment in conjunction with Fig. 8 and Fig. 9, the two of inner sleeve 4 described in present embodiment
End is respectively machined with multiple notch I4-1, end amplification body I1-2 and end amplification body II1-3 and is inserted respectively into notch I4-1,
And the deep equality of insertion.
Other compositions and connection relationship are identical as specific embodiment five.
Specific embodiment 7: illustrate present embodiment in conjunction with Fig. 4, outer tube 2, middle sleeve 3 described in present embodiment
It is square steel tube with inner sleeve 4.
Other compositions and connection relationship are identical as specific embodiment six.
Specific embodiment 8: illustrating present embodiment in conjunction with Fig. 5, body I1-2 is amplified in end described in present embodiment
Length L1 and the end amplification body II1-3 length L2 it is equal.
Since more wave bucklings occur for the kernel unit 1 of anti-buckling support, energy consumption effect is preferable, constraint element concrete layer 8
It is not that very greatly, preferable sidewise restraint can be provided to support by stress with inner sleeve 4.It can be used as self reset curvature-prevention support
Energy dissipating portion.
Due to the presence of inital bending, support is easier that buckling occurs, this increases the energy consumption effect of support to a certain extent
Fruit.It can be seen that the stress curve for resetting muscle 7 is in always on 1 stress curve of kernel unit from Figure 10~Figure 17, and reset
There are certain differences for the maximum tension stress and maximum crushing stress of muscle 7, and the reset capability of support can be by kernel unit 1 and reset muscle
The difference of 7 stress determines that the two difference is bigger, then the reset capability supported is stronger.Therefore, the reset energy to guarantee support
Power, the payload values resetted in muscle 7 during supporting stress deformation will be consistently greater than the load that kernel unit 1 is born.Nothing
By support elongation or shorten, middle sleeve 3 and outer tube 2 are all solely subjected to pressure, and the stress size phase at support maximum displacement
Deng.
As can be seen from Figure 18, when external load is zero, traditional curvature-prevention support component there are biggish residual deformation,
The residual deformation of the utility model is smaller, it is shown that the good reset capability of the utility model, can control structure make in big shake
Seismic response and residual deformation under.The utility model hysteresis loop is more tall and thin, and the second rigidity increase clearly, supports
Bigger load can be carried.Theoretically, when same displacement occurs for the utility model and traditional anti-buckling support, the two it is stagnant
Returning the area that curve is surrounded should be consistent, but due to the reset muscle 7 of Self-resetting system, middle sleeve 3, outer tube 2, first
End plate 5 and the second end plate 6, which also have a small amount of energy consumption, to be occurred, therefore the hysteretic loop of the utility model wants slightly larger.
Other compositions and connection relationship are identical as specific embodiment seven.
Working principle of the utility model is:
If material idealizes completely, when the utility model generates tension and compression deformation in the structure, the stiffness variation of support
Can be identical, hysteresis loop can also have symmetry.If one end=end of support is fixed, the other end applies xial feed, makes
Relative displacement occurs for middle sleeve 3 and outer tube 2, and support tension when institute bearing load is positive, and support compression when institute bearing load is
It is negative, then it supports mainly and experienced the following different stress stage:
(1) initial stage: supporting suffered external force at this time is zero, and each component is subjected only to by the initial tensioning force of reset muscle 7
And the precompression generated, support kernel unit 1 are pressurized, outer tube 2, middle sleeve 3 and kernel unit 1 reset muscle 7 by connection
Two end plates form an entirety, and deform coordination, and three is in self-balancing state.Due to the presence of structural initial pre stress, reset
Muscle 7 is in tension state, other threes are in pressured state.Origin on the corresponding support hesteresis curve of state at this time.
(2) tension load F is applied to support, support first has to overcome the prestressing force resetted in muscle 7 during exercise, prop up at this time
Support is stress in parallel, and the rigidity of support is outer tube 2, middle sleeve 3, resets the sum of muscle 7 and the rigidity of kernel unit 1, works as F=
FyscWhen, wherein FyscFor the nominal yield power of self reset curvature-prevention support, the middle sleeve 3 and the second end plate 6 of this support, housing
Pipe 2 and first end plate 5 are acted on without power.Continue to external force, the middle sleeve 3 of support and the separation of the second end plate 6,2 He of outer tube
The separation of second end plate 6, and first end 5 and the second end plate 6 is pushed to move in the opposite direction, kernel unit 1 extends but still locates
In elastic stage, resets muscle 7 and bear pulling force effect, wherein FyscFor the nominal yield power of the utility model.
Wherein F0For initial precompression, K1For the rigidity of first end plate 5, K2For the rigidity of the second end plate 6, KcFor interior vouching
The rigidity of member, KpIt is the rigidity for resetting muscle 7；
The sum of rigidity of usual outer tube 2 and middle sleeve 3 and kernel unit 1, therefore can be with much larger than the rigidity for resetting muscle 7
Think Fysc≈F0。
(3) with the increase of relative displacement between middle sleeve 3 and outer tube 2, the opposite position of first end plate 5 and the second end plate 6
Shifting is also gradually increased, and the first tension surrender of kernel unit 1 resets muscle 7 and then persistently extends, the rigidity supported at this time is to reset muscle 7
Rigidity.When the deformation of support and power respectively reach maximum value, support stops load, when unloading, restores in resetting muscle 7
Under the action of power, middle sleeve 3 and outer tube 2 are still relatively moved to opposite direction, and the relative displacement between the two is gradually reduced.It is theoretical
On, the unloading rigidity of support is identical with load rigidity, is all reset the sum of muscle 7 and the rigidity of kernel unit 1.
(5) reduce with external load, the distance of two end plates also gradually becomes smaller, until at two end plates and middle sleeve 3, outer tube 2
In the state that flushes, the global stiffness supported at this time is middle sleeve 3, outer tube 2, resets the rigidity after muscle 7 and the surrender of kernel unit 1
With.
The mechanics property analysis of the utility model:
The important component that muscle 7 is the utility model is resetted, directly determines the reset effect of support.It is ideal to reset
The material of muscle 7 should have enough intensity, rigidity and good deformability, while anchoring, cost can be facilitated reasonable again,
It is able to satisfy above-mentioned requirements just using FRP material as muscle 7 is resetted.The deformation of usually selected material will control the bullet in material
Property deformation range in, if prestress application is excessive, will lead to reset muscle deformation it is larger, inhibit kernel unit 1 deformation, and
Also there is higher requirement to the rigidity of Self-resetting system；If prestress application is insufficient, it will lead to and support residual deformation excessive, it is multiple
Capability is insufficient.
The utility model resets the deformation epsilon of muscle 7 under outer load actiontBy the initial strain ε after application prestressing force0With it is multiple
Strain stress composition of the position muscle 7 in support tension and compression process.That is:
εt=ε0+ε
If being F to the structural initial pre stress that muscle 7 applies is resetted0, the length for resetting muscle 7 is LS, area of section As, springform
Amount is Es, then have:
If assuming, support resets η times that segment length is frame catercorner length, can must be resetted by the geometrical relationship of Figure 19
Muscle is as follows in the strain stress of component tension and compression process and the relationship of frame story drift θ:
ε=θ cos α sin α/η
Wherein, it is the angle of support with horizontal direction that η, which generally takes 0.7~0.8, α,.Steel construction bullet is provided in earthquake resistant code
Plasticity interlayer deformation angle limit value is 1/50, i.e. θ=2%.When α≤30 °, corresponding reset muscle 7 answers allergic effect to meet:
ε≤1.09%~1.24%.
Claims (8)
1. a kind of more bushing type FRP reset muscle self reset curvature-prevention support component, it is characterised in that:
It includes curvature-prevention support component and Self-resetting system；
Curvature-prevention support component includes kernel unit (1) and inner sleeve (4)；
Inner sleeve (4) is sleeved on kernel unit (1), is filled with concrete layer (8) between inner sleeve (4) and kernel unit (1)；
Self-resetting system includes outer tube (2), middle sleeve (3), first end plate (5) and the second end plate (6)；
Outer tube (2), middle sleeve (3) and inner sleeve (4) ecto-entad are successively set in together, first end plate (5) and second end
Plate (6) is separately positioned on the both ends of outer tube (2) and by resetting muscle (7) connection, kernel unit (1) from first end plate (5) and
Second end plate (6) stretches out, on outer tube (2) on the side of first end plate (5) and middle sleeve (3) neighbouring second end plate (6)
Side it is affixed with kernel unit (1) respectively.
2. a kind of more bushing type FRP according to claim 1 reset muscle self reset curvature-prevention support component, feature exists
In: the kernel unit (1) includes strip connector (1-1), end amplification body I (1-2) and end amplification body II (1-3)；
End amplification body I (1-2) and end amplification body II (1-3) are respectively and fixedly connected to the both ends of strip connector (1-1)；
End amplification body I (1-2) and end amplification body II (1-3) are respectively protruding into inner sleeve (4), and are corresponded from first
End plate (5) and the second end plate (6) stretch out, and extend into end amplification body I (1-2) and end amplification body II of inner sleeve (4) part
(1-3) is filled with concrete layer (8) between inner sleeve (4) respectively, fills out between strip connector (1-1) and inner sleeve (4)
Filled with concrete layer (8)；
Body I (1-2) is amplified in end and the side of first end plate (5) neighbouring on outer tube (2) is affixed, and body II (1-3) is amplified in end
It is affixed with the side of the second end plate (6) neighbouring on inner sleeve (4).
3. a kind of more bushing type FRP according to claim 2 reset muscle self reset curvature-prevention support component, feature exists
In: the reset muscle (7) is line-styled band steel.
4. a kind of more bushing type FRP according to claim 3 reset muscle self reset curvature-prevention support component, feature exists
In: end amplification body I (1-2) and end amplification body II (1-3) are by the plurality of plates welding that section is " ten " font
It forms.
5. a kind of more bushing type FRP according to claim 4 reset muscle self reset curvature-prevention support component, feature exists
In: the end of the middle sleeve (3) is machined with multiple notches (3-1), and affixed end amplification body I (1-2) is inserted with outer tube (2)
Enter in notch (3-1).
6. a kind of more bushing type FRP according to claim 5 reset muscle self reset curvature-prevention support component, feature exists
In: the both ends of the inner sleeve (4) are respectively machined with multiple notch I (4-1), and body I (1-2) is amplified in end and body II is amplified in end
(1-3) is inserted respectively into notch I (4-1), and the deep equality being inserted into.
7. a kind of more bushing type FRP according to claim 6 reset muscle self reset curvature-prevention support component, feature exists
In: the outer tube (2), middle sleeve (3) and inner sleeve (4) they are square steel tube.
8. a kind of more bushing type FRP according to claim 6 reset muscle self reset curvature-prevention support component, feature exists
In: the length L1 of end amplification body I (1-2) and the length L2 of end amplification body II (1-3) are equal.
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| CN201820874319.0U CN208501947U (en) | 2018-06-06 | 2018-06-06 | A kind of more bushing type FRP reset muscle self reset curvature-prevention support components |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113846765A (en) * | 2021-09-09 | 2021-12-28 | 长安大学 | Self-resetting energy dissipation supporting device |
| CN114991559A (en) * | 2022-06-29 | 2022-09-02 | 东北林业大学 | Displacement amplification type self-resetting buckling-restrained brace and assembling method |
-
2018
- 2018-06-06 CN CN201820874319.0U patent/CN208501947U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113846765A (en) * | 2021-09-09 | 2021-12-28 | 长安大学 | Self-resetting energy dissipation supporting device |
| CN113846765B (en) * | 2021-09-09 | 2023-01-17 | 长安大学 | Self-resetting energy dissipation supporting device |
| CN114991559A (en) * | 2022-06-29 | 2022-09-02 | 东北林业大学 | Displacement amplification type self-resetting buckling-restrained brace and assembling method |
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