CN206458146U - Pole power consumption bar - Google Patents
Pole power consumption bar Download PDFInfo
- Publication number
- CN206458146U CN206458146U CN201720097797.0U CN201720097797U CN206458146U CN 206458146 U CN206458146 U CN 206458146U CN 201720097797 U CN201720097797 U CN 201720097797U CN 206458146 U CN206458146 U CN 206458146U
- Authority
- CN
- China
- Prior art keywords
- section
- energy dissipating
- middle limiting
- realizing middle
- power consumption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Abstract
The utility model discloses a kind of pole power consumption bar, including core component, outer constraint component and pilot pin；The core component is connected and composed by two energy dissipating sections, realizing middle limiting section and two ends linkage section along longitudinally coaxial line, realizing middle limiting section is located at the centre of two energy dissipating sections, and two two ends linkage sections are located at energy dissipating section and realizing middle limiting section forms overall outside and is connected with structure.Realizing middle limiting section and two ends linkage section are all pole, centre diametrically perforate one of realizing middle limiting section, it is two parallel opposite side that energy dissipating section is cut and makes the section for causing energy dissipating section along its length by pole, other two short side is former camber line, the new area of section formed causes core component energy dissipating section under the effect of axial push-pull power to enter surrender, and realizing middle limiting section and two ends linkage section remain elasticity.
Description
Technical field
The utility model belongs to field of civil engineering, is related to a kind of power consumption bar for being used to reduce engineering structure seismic response.
Background technology
City and its building when meeting with violent earthquake not only can recurring structure destruction, can also produce the secondary calamity such as fire
Evil, and thus trigger a series of chain disaster reactions.Accordingly researcher propose energy-dissipating and shock-absorbing concept, it is intended to by structure
Middle installation energy-dissipating device, by its absorption and dissipation energy, effectively reduces seismic structural response, so as to avoid main structure body portion
The heavy damage of position.Mild steel damper is a kind of energy-dissipating and shock-absorbing component of superior performance, in the developed country such as Japan and the U.S.
Quick popularization and application are obtained, and China is still in the starting stage with application for the research of mild steel damper, still suffers from many
Problem needs further solve.Bar consume energy as a kind of new mild steel damper, requires to keep elasticity under small shake effect, with
Structure cooperates there is provided enough overall lateral rigidities, and under fortification intensity or rarely occurred earthquake effect, the core for the bar that consumes energy
Center portion part enters surrender, and deformation of the outer constraint component to core is effectively constrained, and suppresses power consumption bar partly or wholly
Unstability, realizes the tension and compression surrender power consumption of power consumption bar.Therefore, power consumption bar both can as structure common support, and have concurrently simultaneously
The effect of energy-dissipating device, finally causes agent structure is unlikely under geological process to occur destruction or the only destruction of lesser degree,
It is a kind of preferable energy-consuming shock absorber.
The outer constraint component of traditional buckling restrained brace is generally formed by steel with Combined concrete, and cost is relatively low, but
It is the problem of still suffering from certain：(1) quality of concrete is poured into a mould, such as compactness is influenceed larger by technique, concrete setting meeting
Production Time is extended, production efficiency is reduced；(2) because the local leakiness of concrete may cause part by core component pressure
It is broken, so that cause core component local buckling, reduction power consumption bar performance；(3) in order to ensure that core stressed member can freely be drawn
Pressure, often wraps up non-cohesive material in core stressed member so that concrete is disengaged with core stressed member surface, while to core
Stressed member is provided certain space by compression swelling, but during pouring with vibrated concrete, it is difficult to ensure that soap-free emulsion polymeization
Material wraps up core stressed member according to design requirement, so as to influence the performance of buckling restrained brace.
Further, using the bamboo shape buckling restrained brace of all steel about area of beam, such as patent application document (application number：
201610121121.0), its core component is multiple circular energy dissipatings sections and round and elastic section along the alternate setting structure of longitudinally coaxial line
Setting into, round and elastic section causes core component effectively to surrender the reduction of energy dissipating segment length.Under axial displacement effect, core
The plastic strain increase of center portion part energy dissipating section, so as to reduce the low cycle fatigue property of bamboo shape buckling restrained brace.In addition, patent
Application documents (application number：201610645166.8) propose one kind longitudinal direction weaken the buckling-restrained energy-dissipating device of circular rod type, its will
Ask constraint sleeve to be enclosed on the power consumption fragment position of the power consumption core, actually when energy-dissipating device tension extends, part can be caused
The section that consumes energy is stretched out outside confinement sleeve, and local buckling can occur for the power consumption section stretched out during reverse compression outside confinement sleeve.Enter one
The measure that limits outer sleeve consume energy core between is provided in step, this patent application document, and applicant exists
Found in experiment, infinite place section can cause outer constraint component to be slided along core component in power consumption section, cause power consumption Duan He
Load effect local deformation is excessive, and hysteresis loop appearance is obvious asymmetric, has had a strong impact on the Hysteresis Behavior of energy-dissipating device.
Utility model content
Concrete compaction and nothing in buckling restrained brace of the utility model to solve steel and Combined concrete constraint component
Binding material sets the difficult and influence to performance, the core component of bamboo shape buckling restrained brace because the setting of round and elastic section is led
Causing core component effectively to surrender, energy dissipating segment length is reduced and the longitudinal direction weakening circular rod type power consumption bar of infinite place section has power consumption
A kind of the problems such as section compression shifts to an earlier date flexing, it is proposed that the pole power consumption bar of novel belt limited location section.
The technical solution adopted in the utility model is：A kind of pole consumes energy bar, including core component, outer constraint component and fixed
Position bolt；
The core component is connected and composed by two energy dissipating sections, realizing middle limiting section and two ends linkage section along longitudinally coaxial line,
Realizing middle limiting section is located at the centre of two energy dissipating sections, and two two ends linkage sections form entirety positioned at energy dissipating section and realizing middle limiting section
Outside is connected with structure.Realizing middle limiting section and two ends linkage section are all pole, the centre diametrically perforate of realizing middle limiting section
One, it is two parallel opposite side that energy dissipating section is cut and makes the section for causing energy dissipating section along its length by pole, and two short sides are original in addition
Camber line, the new area of section of formation causes core component energy dissipating section under the effect of axial push-pull power enters to surrender, and realizing middle limiting
Section and two ends linkage section remain elasticity；
The outer constraint component is round tube, and core component is located inside outer constraint component, and the length of outer constraint component expires
The length that one end of sufficient two ends linkage section is stretched into inside outer constraint component be more than two ends linkage section diameter or more than energy dissipating section most
1.5 times of large deformation demand, and the diameter of realizing middle limiting section and two ends linkage section is slightly less than the internal diameter of outer constraint component so that two
There is microgap, radial deformation value of the microgap slightly larger than realizing middle limiting section under the effect of maximum axial pressure between person.Wherein,
When make it that power consumption bar tension extends by limiting the length of outer constraint component, power consumption section is always positioned inside outer constraint component, instead
Will not occur local buckling to power consumption section during compression.
The centre of the outer constraint component diametrically perforate two, the diameter in hole two is slightly larger than opening in realizing middle limiting section
Kong Yi, and pilot pin is passed through from hole two and Kong Yizhong.
The energy dissipating section of core component is cut along its length by pole to be made, and the section of energy dissipating section is two parallel opposite side
With two circular arc short sides, microgap is only existed between circular arc short side and outer constraint component.Such local cutting process causes core
The major part of part is all energy dissipating section, effectively increases the stock utilization of core component energy dissipating, the surface for reducing energy dissipating section should
Become.
Further, energy dissipating section local weakening method so that energy dissipating section be pressurized when flexural deformation be perpendicular to weaken face,
Largely avoid the torsional deflection of energy dissipating section, in addition, energy dissipating section circular arc short side, realizing middle limiting section and two ends linkage section with
Between outer constraint duct member, microgap is only existed, the deformation of core component also obtains operative constraint.Thus core component is lateral
Deformation and overall torsional deflection are all well controlled, and further reduce the surface strain of core component, improve
The low cycle fatigue property of power consumption bar.
Preferably, when the core component is steel making, the cross-sectional area of realizing middle limiting section and end linkage section
At least energy dissipating section more than 1.6 times.
When core component is that steel make, the core component of pole power consumption bar can be with superpower phenomenon, i.e., after surrender
Bearing capacity is further improved, and the main cause of this phenomenon is classified as：(1) strain hardening of steel, according to the application utility model
A variety of steel (Q235, Q345, Q390) CYCLIC LOADING experiment that people is carried out to early stage, with reference to existing document achievement, determines steel
Strain hardening coefficient be about 1.42；(2) compression bearing is adjusted, between the core component and outer constraint component of pole power consumption bar
In the presence of inevitable friction and poisson effect, according to the application utility model people's many experimental results, compression bearing is adjusted
Whole maximum can be taken as 1.13.It can thus be concluded that, pole power consumption bar over-strength factor w can be taken as 1.6 (i.e. 1.42 × 1.13 values).
Therefore, the utility model provides that the cross-sectional area of the core component realizing middle limiting section and end linkage section is at least energy dissipating section
1.6 times, it is ensured that the surrender bearing capacity of realizing middle limiting section and end linkage section is more than pole and consumed energy bar maximum load capacity, middle
Spacing section can remain elasticity with end linkage section under load action.
Preferably, the length of the realizing middle limiting section is at least above its radius.
Centre all diametrically perforates of realizing middle limiting section and outer constraint component so that pilot pin can be from outer constraint
Passed through in the hole of part and the hole of realizing middle limiting section.The radius size of perforate is typically taken as 1.5mm, can cause larger in tapping
Stress concentration, according to the result of the test of applicant's early stage, when realizing middle limiting segment length is more than radius, it is ensured that pilot pin
Effectively work, occurs without the premature degradation of realizing middle limiting section.In addition, the experiment that applicant completes shows that spacing section for pole
The Hysteresis Behavior of power consumption bar, which has, to be significantly affected, if the hysteresis loop of infinite place section pole power consumption bar is substantially asymmetric, and is gone out
Now the flexing phenomenon in advance of power consumption section, has the hysteresis loop of power consumption bar of infinite place section as shown in figs. 17-18.
Preferably, described two two ends linkage sections are located at energy dissipating section and realizing middle limiting section forms outside and the structure of entirety
It is connected.
In view of being connected with structure, two ends linkage section can along the circumferential direction open thread formation connecting screw rod, screw rod it is net
Area of section is at least more than 1.5 times of energy dissipating section.
90 degree of progress weakening making preferably, two energy dissipatings section of the core component can along the circumferential direction misplace, make
The parallel opposite side for obtaining two energy dissipatings sections is orthogonal.
Orthogonal energy dissipating section, is weakened that direction is also orthogonal, thus the lateral deformation of energy dissipating section is also orthogonal,
So that the torsional deflection of core component is farthest suppressed.
The utility model has the advantages that：
It is made 1. the energy dissipating section of pole power consumption bar core component is cut along its length by pole, the section of energy dissipating section
For two parallel opposite side and circular arc short side, microgap is only existed between circular arc short side and outer constraint component.Such local cutting process
So that the major part of core component is all energy dissipating section, with bamboo shape buckling restrained brace (application number：201610121121.0) compare,
The stock utilization of core component energy dissipating is effectively increased, the surface strain of energy dissipating section is reduced.
2. the local weakening method of pole power consumption bar energy dissipating section so that energy dissipating section lateral deformation is to be deformed towards weakened part,
Largely avoid the torsional deflection of energy dissipating section, in addition, energy dissipating section circular arc short side, realizing middle limiting section and two ends linkage section with
Between outer constraint duct member, microgap is only existed, the deformation of core component obtains operative constraint.Thus the lateral change of core component
Shape and overall torsional deflection are all constrained well, are reduced the surface strain of core component, are improved buckling-restrained branch
The low cycle fatigue property of support.
3. pole consumes energy, bar core component is connected by two energy dissipating sections, realizing middle limiting section and two ends linkage section along longitudinally coaxial line
Composition is connect, the flexural deformation of energy dissipating section is suppressed by outer constraint component arc surface again under axle power effect, so energy dissipating section hair
Avoided while raw surrender need not be filled between excessive bending deformation, therefore outer constraint component and circular energy dissipating section mortar or
Person's increase excessive parts enter row constraint to it so that the power consumption simple structure of bar and easy to process.
4. the energy dissipating section area of section of pole power consumption bar core component is smaller relative to realizing middle limiting section and two ends linkage section,
So as to which yield force is smaller, the rigidity requirement of external constraint component is relatively low, therefore outer constraint component can be simple circular sleeve pipe so that
Pole power consumption bar simple structure and lighter, convenient installation of conducting oneself with dignity.
5. the realizing middle limiting section of pole power consumption bar core component and the cross-sectional area of two ends linkage section are at least energy dissipating section
1.6 times so that realizing middle limiting section and two ends linkage section remain elasticity, although have subregion be in without restrained condition,
But not generation local buckling, the traditional buckling restrained brace of contrast need to ensure in core component without constraint setting ribbed stiffener
For its stability, construct more simple.
6. the length of the realizing middle limiting section of pole power consumption bar core component is at least above its radius, so as to ensure spacing section
Do not occur on the premise of being destroyed as caused by stress concentration, the performance to buckling restrained brace improves significantly, it is to avoid occur
The phenomenon such as big compression regulation coefficient, power consumption section shift to an earlier date flexing and hysteresis loop is asymmetric, while there is provided a kind of easy limit
Position measure, facilitates the design and fabrication of buckling restrained brace.
90 degree of progress weakening making 7. two energy dissipatings section of core component can along the circumferential direction misplace so that two energy dissipating sections
Parallel opposite side it is orthogonal, the possibility of overall torsional deflection is further suppress from the geometrical construction of core component.
8. it set forth in detail the specific requirement of the length of outer constraint component：Outer constraint is stretched into the one end for meeting two ends linkage section
The length of components interior is more than the diameter of two ends linkage section or more than energy dissipating section 1.5 times of maximum distortion demand, it is ensured that power consumption bar
When tension extends, power consumption section is always positioned inside outer constraint component, and local buckling will not occur for the section that consumed energy during reverse compression.
Brief description of the drawings
Fig. 1 is the pole power consumption bar plan view of the utility model embodiment 1；
Fig. 2 is the pole power consumption bar A-A profiles of the utility model embodiment 1；
Fig. 3 is the pole power consumption bar B-B profiles of the utility model embodiment 1；
Fig. 4 is the pole power consumption bar core component plan view of the utility model embodiment 1；
Fig. 5 is the pole power consumption bar core component C-C profiles of the utility model embodiment 1；
Fig. 6 is the pole power consumption bar core component D-D profiles of the utility model embodiment 1；
Fig. 7 is the pole power consumption bar core component E-E profiles of the utility model embodiment 1；
Fig. 8 is the pole power consumption bar plan view of the utility model embodiment 2；
Fig. 9 is the pole power consumption bar F-F profiles of the utility model embodiment 2；
Figure 10 is the pole power consumption bar G-G profiles of the utility model embodiment 2；
Figure 11 is the pole power consumption bar H-H profiles of the utility model embodiment 2；
Figure 12 is the pole power consumption bar core component plan view of the utility model embodiment 2；
Figure 13 is the pole power consumption bar core component I-I profiles of the utility model embodiment 2；
Figure 14 is the pole power consumption bar core component J-J profiles of the utility model embodiment 2；
Figure 15 is the pole power consumption bar core component K-K profiles of the utility model embodiment 2；
Figure 16 is the pole power consumption bar core component L-L profiles of the utility model embodiment 2.
Figure 17 is the experiment hysteresis loop of limited location section pole power consumption bar.
Figure 18 is the experiment hysteresis loop of infinite place section pole power consumption bar.
Embodiment
The utility model is described further with reference to the accompanying drawings and detailed description.
Embodiment 1
As shown in Fig. 1~7：A kind of pole power consumption bar, including core component 1, outer constraint component 2 and pilot pin 3；
The core component 1 is by two energy dissipatings section 1-1, realizing middle limiting section 1-2 and two ends linkage section 1-3 along longitudinally coaxial line
Connect and compose, realizing middle limiting section 1-2 is located at two energy dissipating section 1-1 centre, two two ends linkage section 1-3 are located at energy dissipating section 1-1
Overall outside is formed with realizing middle limiting section 1-2 with structure to be connected；Realizing middle limiting section 1-2 and two ends linkage section 1-3 is
Pole, the realizing middle limiting section 1-2 centre diametrically 1-2-1 of perforate one, the energy dissipating section 1-1 is cut along its length by pole
It is two parallel opposite side 1-1-1 to cut and make the section for causing energy dissipating section, and two short sides are former camber line 1-1-2 in addition；
The outer constraint component 2 is round tube, and core component 1 is located inside outer constraint component 2, the length of outer constraint component 2
One end that degree meets two ends linkage section 1-3 stretches into the inner length of outer constraint component 2 and is more than two ends linkage section 1-3 diameter or big
In the diameter of energy dissipating section 1.5 times of 1-1 maximum distortion demands, and realizing middle limiting section 1-2 and two ends linkage section 1-3 be slightly less than it is outer about
The internal diameter of beam part 2 so that there is microgap between the two；
The centre of the outer constraint component 2 diametrically 2-1 of perforate two, the 2-1 of hole two diameter are slightly larger than realizing middle limiting
The 1-2-1 of perforate one on section 1-2, and pilot pin 3 is passed through from the 2-1 of hole two and the 1-2-1 of hole one.
When core component 1 is that steel make, realizing middle limiting section 1-2 and end linkage section 1-3 cross-sectional area is at least
More than 1.6 times of energy dissipating section 1-1.Realizing middle limiting section 1-2 length is at least above its radius.Two ends linkage section 1-3 is circumferentially square
To that can open thread formation connecting screw rod, the net cross-sectional area of screw rod is at least more than 1.5 times of energy dissipating section 1-1.
Embodiment 2
As shown in Fig. 8~16：The present embodiment is identical with the remainder of embodiment 1, and difference is the core component 1
Two energy dissipatings section 1-1 can along the circumferential direction misplace 90 degree of progress weakening making so that two energy dissipatings section 1-1 parallel opposite side 1-
1-1 is orthogonal.
It should be pointed out that for those skilled in the art, before the utility model principle is not departed from
Put, some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection domain of the present utility model.This reality
Applying each part being not known in example can use prior art to be realized.
Claims (5)
- The bar 1. a kind of pole consumes energy, including core component (1), outer constraint component (2) and pilot pin (3), it is characterised in that：The core component (1) is same along longitudinal direction by two energy dissipating sections (1-1), realizing middle limiting section (1-2) and two ends linkage section (1-3) Axis is connected and composed, and realizing middle limiting section (1-2) is located at the centre of two energy dissipating sections (1-1), and two two ends linkage sections (1-3) are located at Energy dissipating section (1-1) and the overall outside of realizing middle limiting section (1-2) formation are connected with structure；The realizing middle limiting section (1-2) and two It is all pole, centre diametrically perforate one (1-2-1) of realizing middle limiting section (1-2), the energy dissipating section to hold linkage section (1-3) It is two parallel opposite side (1-1-1) that (1-1) is cut and make the section for causing energy dissipating section along its length by pole, and two short sides are in addition Former camber line (1-1-2)；The outer constraint component (2) is round tube, and core component (1) is located at outer constraint component (2) inside, outer constraint component (2) Length meet two ends linkage section (1-3) one end stretch into outer constraint component (2) inner length be more than two ends linkage section (1-3) Diameter or more than energy dissipating section 1.5 times of (1-1) maximum distortion demand, and realizing middle limiting section (1-2) and two ends linkage section (1-3) Diameter be slightly less than the internal diameters of outer constraint component (2) so that there is microgap between the two；The centre of the outer constraint component (2) diametrically perforate two (2-1), the diameter of hole two (2-1) is limited slightly larger than middle Perforate one (1-2-1) in position section (1-2), and pilot pin (3) can be passed through from hole two (2-1) and hole one (1-2-1).
- 2. a kind of pole power consumption bar according to claim 1, it is characterised in that：The core component (1) makes for steel When, the cross-sectional area of realizing middle limiting section (1-2) and end linkage section (1-3) is at least more than 1.6 times of energy dissipating section (1-1).
- 3. a kind of pole power consumption bar according to claim 1, it is characterised in that：The length of the realizing middle limiting section (1-2) At least above its radius.
- 4. a kind of pole power consumption bar according to claim 1, it is characterised in that：The two ends linkage section (1-3) is circumferentially Thread formation connecting screw rod is opened in direction, and the net cross-sectional area of screw rod is at least more than 1.5 times of energy dissipating section (1-1).
- 5. a kind of pole power consumption bar according to claim 1, it is characterised in that：Two energy dissipatings of the core component (1) Section (1-1) can along the circumferential direction misplace 90 degree and carry out weakening making so that the parallel opposite side (1-1-1) of two energy dissipating sections (1-1) It is orthogonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720097797.0U CN206458146U (en) | 2017-01-25 | 2017-01-25 | Pole power consumption bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720097797.0U CN206458146U (en) | 2017-01-25 | 2017-01-25 | Pole power consumption bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206458146U true CN206458146U (en) | 2017-09-01 |
Family
ID=59693494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720097797.0U Withdrawn - After Issue CN206458146U (en) | 2017-01-25 | 2017-01-25 | Pole power consumption bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206458146U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836927A (en) * | 2017-01-25 | 2017-06-13 | 东南大学 | Pole power consumption bar |
| CN113175115A (en) * | 2021-05-11 | 2021-07-27 | 四川大学 | Double-rigidity buckling restrained damper |
-
2017
- 2017-01-25 CN CN201720097797.0U patent/CN206458146U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106836927A (en) * | 2017-01-25 | 2017-06-13 | 东南大学 | Pole power consumption bar |
| CN113175115A (en) * | 2021-05-11 | 2021-07-27 | 四川大学 | Double-rigidity buckling restrained damper |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206309097U (en) | The replaceable assembled buckling restrained brace of section is surrendered after one kind shake | |
| CN106760854B (en) | Rectilinear laemodipodiform pole energy consumption bar | |
| CN106836927A (en) | Pole power consumption bar | |
| CN105714952B (en) | Bamboo shape buckling restrained brace | |
| CN105735504B (en) | Rectangle ring buckling restrained brace | |
| CN104005490B (en) | Anti-buckling limit support member for reinforcing post-yield stiffness | |
| CN109629403B (en) | Concrete support column structure and manufacturing method thereof | |
| CN206458146U (en) | Pole power consumption bar | |
| CN106760855B (en) | Laemodipodiform pole energy consumption bar | |
| CN112267591A (en) | Self-resetting buckling-restrained brace with replaceable energy-consuming inner core | |
| CN207553342U (en) | A kind of anti-buckling constraint support | |
| CN101560791A (en) | Shear wall truss hybrid type lateral resisting structure system | |
| CN205399715U (en) | Serial -type bamboo shape buckling restrained brace | |
| CN1963060A (en) | Lead and buckling-restrained supporting composite energy dissipation device and method for making same | |
| CN105604205B (en) | Modularization bamboo shape buckling restrained brace | |
| WO2016169124A1 (en) | Damping steel bar connector | |
| CN208202202U (en) | A kind of semi-girder truss main diagonal of band bending surrender Wasted-energy steel plate | |
| CN204609031U (en) | The anti-buckling bracing members of additional damping can be provided | |
| CN211172484U (en) | Multistage yield stress-resistant stable-load support | |
| CN202248249U (en) | Buckling restrained brace | |
| CN106049699A (en) | Sleeve restraint anti-buckling support provided with staggered pyramid-shaped energy dissipation units | |
| CN205530774U (en) | Excel in and low yield point steel combination formula buckling restrained brace | |
| CN205857407U (en) | Inner circle foreign side hollow sandwich band presstressed reinforcing steel concrete-filled steel tube truss tubular joint | |
| CN109610726A (en) | A kind of reinforcing bar and cold-formed thin-walled C steel coupled column destroyed for local buckling | |
| CN106760009A (en) | A kind of sleeve pipe flexing with ring pineapple type induction unit induces support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170901 Effective date of abandoning: 20190813 |
|
| AV01 | Patent right actively abandoned |