CN105603870B - The bridge pier power consumption of built-in power consumption reinforcing bar and viscoelastic material layer and anti-crushed structure - Google Patents
The bridge pier power consumption of built-in power consumption reinforcing bar and viscoelastic material layer and anti-crushed structure Download PDFInfo
- Publication number
- CN105603870B CN105603870B CN201610107842.6A CN201610107842A CN105603870B CN 105603870 B CN105603870 B CN 105603870B CN 201610107842 A CN201610107842 A CN 201610107842A CN 105603870 B CN105603870 B CN 105603870B
- Authority
- CN
- China
- Prior art keywords
- power consumption
- bridge pier
- uhpc
- reinforcing bar
- section
- 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.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/262—Concrete reinforced with steel fibres
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
Abstract
The invention discloses the bridge pier power consumption of a kind of built-in power consumption reinforcing bar and viscoelastic material layer and anti-crushed structure, the structure is four sides of coxopodite section respectively two pieces of ultra-high performance concrete (Ultra High Performance Concrete of arrangement in stem grafting seam section assembling bridge pier vulnerable zone, UHPC) plate, viscoelastic material layer is set between bridge pier coxopodite section and UHPC plates, UHPC plates are combined integral with coxopodite section using finish rolling deformed bar application prestressing force, reserving hole channel between two blocks of UHPC plates, for placing power consumption reinforcing bar.The present invention has the property of " splitting without broken " using UHPC to prevent that inner bottom section is crushed under geological process excitation because of mixing of steel fiber, prevent that the power consumption reinforcing bar in duct from occurring corrosion using the closely knit property of UHPC structures, the UHPC around hole can prevent that power consumption reinforcing bar from buckling failure occurring when being pressurized simultaneously, and power consumption reinforcing bar and viscoelastic material layer are then used to improve energy dissipation capacity of the stem grafting seam section assembling bridge pier under geological process excitation.
Description
Technical field
The present invention relates to middle highly seismic region bridge rapid construction technology and Seismic Design Method, more particularly to section assembling skill
Art, external prestressing technique and the damper technology consumed energy using metal material, belong to field of civil engineering.
Background technology
Stem grafting seam section assembling bridge pier because have rapid construction advantage and self-resetting capability, including port Zhuhai and Macao bridge with
Engineer applied has been obtained in some across river bridge spanning the seas including Canadian Federal bridge.The bridge pier of this form is by pier shaft edge
Some sections are vertically divided into, Reinforcement disconnects at segmental joints, are connected between section using " stem grafting seam ", or
Fill epoxy resin to improve the durability of bridge pier in seam crossing, then connected into section by the way of post-tensioned prestressing whole
Body.Domestic and foreign scholars are found by experimental and theoretical study, stem grafting stitch section assembling bridge pier under seismic stimulation energy dissipation capacity compared with
Difference, and easily crushed in coxopodite section.
To improve the energy dissipation capacity that stem grafting stitches section assembling bridge pier, at present using most in engineering practice and scientific research
Method be the built-in power consumption reinforcing bar in stem grafting seam section assembling bridge pier.Although this method can improve the power consumption energy of bridge pier
Power, but the residual deformation for shaking rear abutment can be caused to increase simultaneously, while built-in power consumption reinforcing bar is not easy to change after shake.
Using most in the problem of easily being crushed in seismic stimulation bottom section for stem grafting seam section assembling bridge pier, engineering
Method be to increase coxopodite section concrete constraint to improve the deformability of concrete, being included in coxopodite section concrete increases
Stirrup consumption, using concrete filled steel tube make coxopodite section or in coxopodite section concrete outer wrap FRP, this method really can
Enough mitigate degree of injury of the coxopodite section under seismic stimulation, but damage concrete there is also being difficult to change after shake the problem of.
The content of the invention
Technical problem：It is an object of the invention to provide it is a kind of it is built-in power consumption reinforcing bar and viscoelastic material layer bridge pier power consumption with
Anti-crushed structure, stem grafting seam section assembling bridge pier is improved using reinforcing bar is consumed energy built in replaceable UHPC plates and is encouraged in geological process
Under energy dissipation capacity and anti-crushed coxopodite section crushing, can not only be improved using this structure stem grafting stitch section assembling bridge pier on ground
The lower energy dissipation capacity of shake excitation and coxopodite section crushing is prevented, and can be by changing impaired UHPC plates after shake and wherein built-in
Power consumption reinforcing bar and viscoelastic material layer quickly repair impaired bridge pier, recover the use function of bridge in time.
Technical scheme：The present invention is a kind of built-in power consumption reinforcing bar and bridge pier power consumption and the anti-crushed knot of viscoelastic material layer
Structure, the structure UHPC plates that each two pieces of arrangement is superimposed on the outside of four sides of bridge pier coxopodite section, between bridge pier coxopodite section and UHPC plates
Reserving hole channel between viscoelastic material layer, two blocks of UHPC plates is set to be used for placing power consumption reinforcing bar；Finish rolling deformed bar is horizontally through
Bridge pier coxopodite section and UHPC plates, the two ends of finish rolling deformed bar are anchored by high-strength nut and steel plate washer respectively, described UHPC
Plate applies prestressing force by finish rolling deformed bar with bridge pier coxopodite section and combines both into entirety；Described power consumption reinforcing bar passes through band
Embedded bar of the steel bushing of screw thread respectively with upper segment and cushion cap is connected；Described bridge pier coxopodite section and UHPC plates and top
Need to set rubber spacer between section, prevent in the case where geological process is encouraged because the collision of bridge pier coxopodite section causes upper segment to send out
Raw damage, upper segment will increase wall thickness with bridge pier coxopodite section seam crossing, be gradually reduced to wall thickness.
Diameter of the described reserving hole channel diameter slightly larger than power consumption reinforcing bar.
Described UHPC plates are made using the UHPC of incorporation micro steel fiber,
Beneficial effect：Present invention contrast prior art has advantages below：
1. the invention is separated vulnerable zone with protected district using capacity protection principle, applied using finish rolling deformed bar
Prestressing is integral using the UHPC plates as vulnerable zone and inner bottom sections as protected district, can pass through after shake
Loosening and tensioning again for finish rolling deformed bar, realizes the quick-replaceable to being damaged UHPC plates.
2. vulnerable zone uses UHPC plates, the property of " splitting without broken " that UHPC has by mixing of steel fiber can be made full use of
Matter and the corrosion resistant property having because structure is closely knit.
3. setting viscoelastic material layer between bridge pier coxopodite section and UHPC plates, ensure to encourage in geological process by calculating
Under only bridge pier coxopodite section and UHPC plates between occur less relative displacement, using viscoelastic material occur detrusion when can
The operation principle of power consumption, increases the energy dissipation capacity of bridge pier, while viscoelastic material layer is only cementing with UHPC plates, with bridge pier coxopodite section
Soap-free emulsion polymeization, changes the replacement that UHPC plates are achieved that viscoelastic material layer after shake.
4. two blocks of replaceable UHPC plates are set respectively on four sides of bridge pier coxopodite section, the reserving hole channel for placing power consumption reinforcing bar
It is arranged between two blocks of UHPC plates, such way not only improves and power consumption reinforcing bar is observed and changed after shake, is also beneficial to
The steel bar corrosion that consumes energy is prevented, while when power consumption reinforcing bar can be prevented to be pressurized buckling failure occurs for the UHPC around duct.
5. the diameter of power consumption reinforcing bar will be slightly smaller than the diameter of reserving hole channel, the upper and lower end for the reinforcing bar that consumes energy passes through steel bushing point
Embedded bar not with upper segment and cushion cap is connected, and not only improves the replacing to rod iron damper after shake, also ensure that plug
Can be with Free Transform under geological process excitation.
6. needing to set rubber spacer between stem grafting seam section assembling bridge pier coxopodite section and UHPC plates and upper segment, prevent ground
Because the collision of coxopodite section causes upper segment to damage under shake effect excitation, the damage that bridge pier may occur so is ensured that
Wound only concentrates on replaceable UHPC plates, is conducive in time recovering after shake the use function of bridge, is that earthquake relief work gains time.
Brief description of the drawings
Fig. 1 is embodiment of the present invention structural section；
Fig. 2 is embodiment of the present invention construction top view；
Label declaration in figure：1- bridge piers coxopodite section, 2-UHPC plates, 3- viscoelastic material layers, 4- reserving holes, 5- power consumption steel
Muscle, 6- finish rolling deformed bars, 7- high-strength nuts, 8- steel plate washers, 9- steel bushings, 10- upper segments, 11- embedded bars, 12- rubbers
Rubber cushion layer.
Embodiment
The present invention is that one kind improves stem grafting by using power consumption reinforcing bar built in replaceable UHPC plates and viscoelastic material layer
Energy dissipation capacity of the seam section assembling bridge pier under geological process excitation and the structure for preventing that coxopodite section from crushing, the structure are needed to use
Replaceable UHPC plates, viscoelastic material layer, power consumption reinforcing bar, finish rolling deformed bar, high-strength nut, steel plate washer, steel bushing, pre-buried steel
Muscle and rubber spacer.
Described replaceable UHPC plates set two pieces, between UHPC plates and bridge pier coxopodite section respectively on four sides of bridge pier coxopodite section
Viscoelastic material layer is set, by cementing connection between viscoelastic material layer and UHPC plates, by rubbing between bridge pier coxopodite section
Reserving hole channel between wiping power power transmission, two blocks of UHPC plates, for placing power consumption reinforcing bar, described duct is divided with bridge pier center in symmetrical
Cloth.
Described replaceable UHPC plates are integral by finish rolling deformed bar application prestressing combination with inner bottom section, lead to
The thickness for calculating and obtaining replaceable UHPC plates is crossed, using UHPC because mixing of steel fiber has the property of " splitting without broken ", it is ensured that shake
Afterwards replaceable UHPC plates only occur local damage and will not occurrence of large-area crushing, while inner bottom section is still remained intact, foot
Enough support top dead loads and connection different segment apply prestressing force, can quick-recovery bridge pier soon by replacing UHPC plates after shake.
Coefficient of friction between described viscoelastic material layer and bridge pier coxopodite section should be less than the friction system between UHPC plates
Number, by applying suitable prestressing force, it is ensured that only occur under geological process excitation between bridge pier coxopodite section and UHPC plates smaller
Relative displacement, viscoelastic material layer can occur detrusion and produce power consumption, not have relative displacement between two blocks of UHPC plates.
Described power consumption bar diameter is slightly smaller than the diameter in duct, wherein the upper and lower end of consumption reinforcing bar is distinguished by steel bushing
It is connected with the embedded bar of upper segment and cushion cap, stem grafting stitches section assembling bridge pier can be in the horizontal direction under geological process excitation
Wave so that by tension and compression repeatedly elastic-plastic deformation is occurred for mild steel plug, reach the purpose of power consumption.Wherein reserving hole channel
The UHPC of surrounding plays a part of preventing that power consumption reinforcing bar from occurring buckling failure, and hole diameter is slightly larger than power consumption bar diameter, to consume
Energy reinforcing bar is by compression swelling headspace.
Duct and power consumption reinforcing bar in described replaceable UHPC plates are 20.
Need to set rubber spacer between stem grafting seam section assembling bridge pier coxopodite section and UHPC plates and upper segment, prevent earthquake
Because the collision of coxopodite section causes upper segment to damage under effect excitation.Upper segment will increase with coxopodite section seam crossing
Wall thickness, is gradually reduced to wall thickness, when can so ensure to change UHPC plates successively after shake, and bridge pier remains to effectively that top is permanent
Carry and prestressing force passes to cushion cap.
The process that the present invention is embodied is as follows：
Step 1：Stem grafting is stitched into each section of section assembling bridge pier and is transported to job site, each section edge on cushion cap from precast plant
It is vertical place in order it is errorless after, the cohesive good rubber spacer 12 in the bottom surface of upper segment 10, by post-tensioned prestressing by each section
Section connection is integral；
Step 2：One block of UHPC plate 2 is sequentially placed on 1 four sides of coxopodite section, viscoelastic material layer 3 has been glued in precast plant
Knot is on UHPC plates 2 such as Fig. 2；
Step 3：The reinforcing bar 5 that will consume energy is placed on the grooves of UHPC plates 2, and by steel bushing 9 respectively with upper segment 10
It is connected with the embedded bar 11 in cushion cap；
Step 4：Another block of UHPC plate 2 such as Fig. 2 is sequentially placed on 1 four sides of bridge pier coxopodite section, two blocks of UHPC plates 2 are in preformed hole
Alignd at road 4, the reinforcing bar 5 that now consumes energy is just in reserving hole channel 4；
Step 5：Finish rolling deformed bar 6 is passed through to the duct being reserved on bridge pier coxopodite 1 and UHPC of section plates 2, according to《Highway
Bridges and culverts construction technique normalizing》Regulation in JTG/TF50-2011 on tensioning finish rolling deformed bar 6, using relevant device to essence
Roll spiral 6 and apply prestressing force, and it is anchored using high-strength nut 7 and steel plate washer 8.
In the present embodiment, the UHPC plates 2 described in step 2 are made by the UHPC of incorporation micro steel fiber, UHPC plates 2
Thickness is obtained by calculating, to ensure that damage does not occur for inner bottom section 1 for calculating principle.
In the present embodiment, described in step 2 the coefficient of friction between viscoelastic material layer 3 and bridge pier coxopodite section 1 should be small
Coefficient of friction between UHPC plates 2, it is ensured that only occur under geological process excitation between bridge pier coxopodite section 1 and UHPC plates 2 compared with
Small relative displacement, viscoelastic material layer 3 can occur detrusion and produce power consumption, without relative between two blocks of UHPC plates 2
Displacement.
In the present embodiment, reserving hole channel 4 and power consumption reinforcing bar 5 are 20, preformed hole in the UHPC plates 2 described in step 3
The diameter of road 4 is slightly larger than the diameter of power consumption reinforcing bar 5, and when stem grafting seam section assembling bridge pier, occurred level is deformed under geological process excitation
When, whole power consumption reinforcing bar 5 can Free Transform, give full play to energy dissipation capacity.
As described above, although the present invention has been represented and described with reference to specific preferred embodiment, it must not be explained
For to the limitation of itself of the invention., can be right under the premise of the spirit and scope of the present invention that appended claims are defined are not departed from
It makes a variety of changes in the form and details.
Claims (1)
1. bridge pier power consumption and the anti-crushed structure of a kind of built-in power consumption reinforcing bar and viscoelastic material layer, it is characterised in that the structure
The UHPC plates (2) that each two pieces of arrangement is superimposed on the outside of (1) four side of bridge pier coxopodite section, bridge pier coxopodite section (1) and UHPC plates (2) it
Between viscoelastic material layer (3) is set, reserving hole channel (4) is used for placing power consumption reinforcing bar (5) between two pieces of UHPC plates (2)；Finish rolling spiral shell
Line reinforcing bar (6) is horizontally through bridge pier coxopodite section (1) and UHPC plates (2), and the two ends of finish rolling deformed bar (6) pass through high-strength spiral shell respectively
Female (7) and steel plate washer (8) anchoring, described UHPC plates (2) apply pre- with bridge pier coxopodite section (1) by finish rolling deformed bar (6)
Stress combines both into entirety；Described power consumption reinforcing bar (5) by threaded steel bushing (9) respectively with upper segment (10)
It is connected with the embedded bar (11) of cushion cap；Need to set between described bridge pier coxopodite section (1) and UHPC plates (2) and upper segment (10)
Rubber spacer (12) is put, is prevented in the case where geological process is encouraged because the collision of bridge pier coxopodite section (1) causes upper segment (10) to send out
Raw damage, upper segment (10) will increase wall thickness with bridge pier coxopodite section (1) seam crossing, be gradually reduced to wall thickness；
Diameter of described reserving hole channel (4) diameter slightly larger than power consumption reinforcing bar (5)；
Described UHPC plates (2) are made using the UHPC of incorporation micro steel fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610107842.6A CN105603870B (en) | 2016-02-26 | 2016-02-26 | The bridge pier power consumption of built-in power consumption reinforcing bar and viscoelastic material layer and anti-crushed structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610107842.6A CN105603870B (en) | 2016-02-26 | 2016-02-26 | The bridge pier power consumption of built-in power consumption reinforcing bar and viscoelastic material layer and anti-crushed structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105603870A CN105603870A (en) | 2016-05-25 |
| CN105603870B true CN105603870B (en) | 2017-07-18 |
Family
ID=55984180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610107842.6A Active CN105603870B (en) | 2016-02-26 | 2016-02-26 | The bridge pier power consumption of built-in power consumption reinforcing bar and viscoelastic material layer and anti-crushed structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105603870B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106192729B (en) * | 2016-07-14 | 2017-10-20 | 东南大学 | Precast assembly bridge pier core shape joggle head structure and construction method |
| CN111335146B (en) * | 2020-03-10 | 2021-05-18 | 青岛理工大学 | Frame type replaceable buckling-restrained damping energy dissipation device and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10169095A (en) * | 1996-12-09 | 1998-06-23 | Sekisui House Ltd | Post with built-in aseismatic damper and rigid-frame structure skeleton with aseismatic post |
| CN202116975U (en) * | 2011-05-17 | 2012-01-18 | 中国地震局工程力学研究所 | Subsection prefabrication casing wall for steel fiber concrete |
| CN102409606A (en) * | 2011-07-29 | 2012-04-11 | 清华大学 | Self-resetting pier column structural system with built-in energy dissipation assembly and implementing method for self-resetting piper column structural system |
| CN102587578A (en) * | 2012-03-21 | 2012-07-18 | 河南理工大学 | High-strength steel bar enhanced engineered cementitious composites (ECC)-hollow steel pipe ultra high performance concrete (UHPC) combination column member and manufacturing method thereof |
| CN104847052A (en) * | 2015-04-29 | 2015-08-19 | 华侨大学 | Earthquake damage replaceable combination column structure |
-
2016
- 2016-02-26 CN CN201610107842.6A patent/CN105603870B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10169095A (en) * | 1996-12-09 | 1998-06-23 | Sekisui House Ltd | Post with built-in aseismatic damper and rigid-frame structure skeleton with aseismatic post |
| CN202116975U (en) * | 2011-05-17 | 2012-01-18 | 中国地震局工程力学研究所 | Subsection prefabrication casing wall for steel fiber concrete |
| CN102409606A (en) * | 2011-07-29 | 2012-04-11 | 清华大学 | Self-resetting pier column structural system with built-in energy dissipation assembly and implementing method for self-resetting piper column structural system |
| CN102587578A (en) * | 2012-03-21 | 2012-07-18 | 河南理工大学 | High-strength steel bar enhanced engineered cementitious composites (ECC)-hollow steel pipe ultra high performance concrete (UHPC) combination column member and manufacturing method thereof |
| CN104847052A (en) * | 2015-04-29 | 2015-08-19 | 华侨大学 | Earthquake damage replaceable combination column structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105603870A (en) | 2016-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106758786B (en) | A kind of prefabricated assembled concrete-filled double skin steel tube lattice bridge pier | |
| Cheng et al. | Seismic performance of repaired hollow-bridge piers | |
| CN110359633A (en) | A kind of concrete foot joint of the replaceable energy consumption connection component containing high ductility | |
| CN108442569A (en) | A kind of recoverable function energy consumption reinforced concrete shear wall and its method of construction | |
| CN109972501A (en) | A kind of Novel swing Self-resetting bridge pier with energy-consuming device and its application | |
| CN108677690B (en) | Energy dissipating Self-resetting bilayer rectangle hollow concrete filled steel tube waves Bridge Pier Structure System | |
| CN105735110B (en) | Bridge pier power consumption and the anti-crushed structure of the replaceable built-in rod iron damper of composite plate | |
| CN105714674B (en) | The bridge pier power consumption of the replaceable built-in power consumption reinforcing bar of composite plate and anti-crushed structure | |
| CN104562922A (en) | Locally-embedded steel pipe concrete column type aseismatic bridge pier | |
| CN105586828B (en) | Bridge pier power consumption and the anti-crushed structure of built-in Wasted-energy steel plate and viscoelastic material layer | |
| CN105696457B (en) | Bridge pier power consumption and the anti-crushed structure of Wasted-energy steel plate built in replaceable composite plate | |
| US11674323B2 (en) | Device and method for reinforcing round section wood beam by combination of prestressed FRP sheet and high strength steel wire rope | |
| CN105484152A (en) | Connection mode of pier and bearing platform through additional mild steel dampers | |
| CN108755975A (en) | A kind of the assembled connecting node and construction method of replaceable Self-resetting | |
| CN107905091A (en) | A kind of section assembling FRP using SMA presstressed reinforcing steel systems strengthens concrete pier of steel tube | |
| CN105603870B (en) | The bridge pier power consumption of built-in power consumption reinforcing bar and viscoelastic material layer and anti-crushed structure | |
| CN104805775A (en) | Construction method for RC (Reinforced Concrete) bridge pier post-earthquake restoration technology | |
| CN108316130A (en) | A kind of assembled pier of regular reinforcement and finish rolling deformed bar hybrid reinforcement | |
| CN105735108B (en) | Built-in anti-buckling support and the bridge pier power consumption of viscoelastic material layer and anti-crushed structure | |
| Ju et al. | Non-compression X-bracing system using CF anchors for seismic strengthening of RC structures | |
| CN206887745U (en) | A kind of section assembling FRP using SMA strengthens concrete pier of steel tube | |
| CN105672120B (en) | Bridge pier power consumption and the anti-crushed structure of the replaceable built-in anti-buckling support of composite plate | |
| CN106639347B (en) | Two dimension prestressing semicircle steel plate is online without damaged reinforced concrete cylinder method | |
| CN108442238A (en) | A kind of transverse direction assembled runback bit-type Antivibration block and its construction method | |
| CN105735109B (en) | Bridge pier power consumption and the anti-crushed structure of built-in rod iron damper and viscoelastic material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |