CN108252203A - A kind of assembled concrete pier system of mixed configuration FRP tendons and regular reinforcement - Google Patents
A kind of assembled concrete pier system of mixed configuration FRP tendons and regular reinforcement Download PDFInfo
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- CN108252203A CN108252203A CN201810110415.2A CN201810110415A CN108252203A CN 108252203 A CN108252203 A CN 108252203A CN 201810110415 A CN201810110415 A CN 201810110415A CN 108252203 A CN108252203 A CN 108252203A
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- frp tendons
- regular reinforcement
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- 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
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- 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
- E01D2101/28—Concrete reinforced prestressed
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention provides a kind of mixed configuration FRP tendons and the assembled concrete pier system of regular reinforcement, including concrete bearing platform（1）, assembled pier shaft（2）, the vertical muscle of perforation（6）And unbonded prestressing tendon（7）；It is characterized in that：The assembly pier shaft（2）By one or more than one prefabricated subsection（4）Composition, the vertical muscle of perforation（6）It is mixed, and and unbonded prestressing tendon by two kinds of reinforcing bars of FRP tendons and regular reinforcement（7）Together by concrete bearing platform（1）, assembled pier shaft（2）It is connected to become complete pier system.
Description
Technical field
The present invention relates to a kind of Precast Concrete Segmental Bridges concrete pier, more particularly to a kind of mixed configuration FRP tendons and commonly
The Precast Concrete Segmental Bridges concrete pier system of reinforcing bar.
Background technology
In recent years, researcher had carried out Precast Concrete Segmental Bridges bridge pier some researchs, to realize reinforced concrete knoll
It is quick to build.The type bridge pier uses prefabrication and assembly construction technology, and pier shaft is first vertically divided into several segments and carries out prefabricated, then is transported
It transports to and assembly is carried out at bridge site, generally each segment is press-connected using unbonded prestressing tendon when assembled and is integrally formed bridge pier structure
Part, because efficiency of construction is higher.However, section assembling bridge pier is due to there are more splicing seams, pier shaft precision with it is cast-in-place
Reinforced concrete knoll is compared to have and largely be reduced, and the etching medium that rainwater, river water especially seawater etc. carries chlorion is more easy to
It is penetrated into inside pier shaft by splicing seams.The corrosion that Chloride Attack will substantially speed up bridge pier longitudinal reinforcement, holds so as to cause bridge pier
The serious degeneration of power is carried, then causes the safety issue of entire bridge structure.Therefore, it is necessary to it carries out going deep into research and development to delay
Or avoid the corrosion problem of section assembling bridge pier seam crossing longitudinal reinforcement.However, it is resistance to still to lack raising section assembling bridge pier at present
The effective scheme of long property.
On the other hand, current design Precast Concrete Segmental Bridges bridge pier research and development and application be devoted to greatly improve bridge pier construction
Efficiency reduces self-inflicted injury degree after bridge pier shake, and after extremely lacking maximum displacement response when can reduce bridge pier shake simultaneously and shaking
The research of residual displacement.Both some researches show that rigidity can effectively reduce maximum displacement response when bridge pier shakes after improving yield of pier
And its discreteness, and be remarkably improved component self-resetting capability, it is ensured that bridge pier suffer disaster from an earthquake after functionality, after ensureing shake
The disaster relief and the smooth development of reconstruction.But it is possible to effectively improve the ripe scheme of rigidity after section assembling yield of pier still
It has not been reported.
In recent years, fibre reinforced composites（Fiber Reinforced Polymer, FRP）Because having lightweight, height
By force, the good characteristics such as corrosion-resistant, it is more prevalent in the application of science of bridge building and building field.Using FRP fabrics, plank and FRP
Muscle improves structure or the research of component anti-seismic performance has obtained more achievement.Therefore, section assembling bridge pier is improved using FRP tendons to bend
Rigidity and durability after clothes provide new think of to solve two large problems present in aforementioned Precast Concrete Segmental Bridges bridge pier research
Road.But the specific research and development that two large problems described above are solved using FRP tendons are not yet seen in report with application.
Invention content
The object of the present invention is to provide a kind of mixed configuration FRP tendons and the Precast Concrete Segmental Bridges concrete pier body of regular reinforcement
System.Regular reinforcement is by easily occurring corrosion and bar diameter is caused constantly to reduce after Chloride Attack, tensile strength standard
Value is between 400MPa ~ 500MPa, after corresponding tensile yield is strained between 0.2% ~ 0.3%, and regular reinforcement is because of surrender
Hardening coefficient very little, approximation meet ideal elastic-plastic this structure.FRP tendons have outstanding chloride resisting properties, and tension is strong
Range is spent between 600MPa ~ 2200MPa, and ultimate tensile strength is between 1.0% ~ 4.4%, and FRP tendons are less than pole in tensile stress
Linear elasticity stress-strain relation is kept substantially when limiting stretching strain.Therefore, two kinds of FRP tendons and regular reinforcement are configured simultaneously in bridge pier
Longitudinal stress muscle enables regular reinforcement planar be located at the inside of FRP tendons, improves the protective layer thickness of regular reinforcement, effectively
The reinforcing bar initial corrosion time is postponed, so as to effectively delay performance caused by bridge structure service phase internal cause longitudinal reinforcement corrosion
It degenerates；Meanwhile prolonged using post-yield stiffness, bearing capacity, energy dissipation capacity and the displacement of the linear elasticity feature raising bridge pier of FRP tendons
Property, so as to effectively reduce maximum displacement response and its discreteness of the bridge pier under seismic stimulation, improve bridge pier self-resetting capability, subtract
Residual displacement after small shake improves usability and easy prosthetic after bridge pier shake.
The present invention provides a kind of mixed configuration FRP tendons and the Precast Concrete Segmental Bridges concrete pier system of regular reinforcement, including
Concrete bearing platform（1）, assembled pier shaft（2）, the vertical muscle of perforation（6）And unbonded prestressing tendon（7）；It is characterized in that：The assembly
Pier shaft（2）By one or more than one prefabricated subsection（4）Composition, the vertical muscle of perforation（6）By two kinds of FRP tendons and regular reinforcement
Reinforcing bar mixes, and and unbonded prestressing tendon（7）Together by concrete bearing platform（1）, assembled pier shaft（2）It is connected to become complete
Pier system.
Each prefabricated subsection（4）Geometric dimension, reinforcement detailing and material therefor can be identical, to reduce assembled difficulty,
Improve construction efficiency；Also can be different, to reduce the prefabricated cost of bridge pier.Each prefabricated subsection（4）Upper and lower end face can be plane, such as
This, mainly the shearing generated under geological process is effectively transmitted between neighbouring two segment by friction shear resisting mechanism；In addition, root
It is needed according to Aseismic Design, prefabricated subsection（4）Upper and lower end face single or multiple shear keies can also be set, in this way, after assembly
Neighbouring two segment is mutually twisted, and can effectively improve the shear-carrying capacity at splicing seams.
The vertical muscle of perforation（6）The type of regular reinforcement used for HRB400, HRB500, HRBF400, HRBF500, HRB400E,
HRB500E、HRBF400E、HRBF500E.The vertical muscle of perforation（6）The type of FRP tendons used for BFRP tendons, CFRP tendons, GFRP tendons and
AFRP tendons.
Concrete bearing platform（1）, each prefabricated subsection（4）Reserved ripple duct（5）.Reserved ripple duct（5）Using pre-buried
The mode of metal bellows realizes that bellows uses zinc-plated reinforced metal bellows, and bellows should meet specification《Prestressing force mixes
Solidifying soil metal bellows（JG 225-2007）》Requirement.Unbonded prestressing tendon（7）Anchoring lower ends in concrete bearing platform
（1）In, muscle beam sequentially passes through each prefabricated subsection during bridge pier assembly（4）In reserve inner wall smooth presstressed reinforcing steel duct（8）, muscle
Beam upper anchorage is in presstressed reinforcing steel anchorage groove（3）In.Unbonded prestressing tendon（7）Presstressed reinforcing steel type used is twisted for steel
Line, prestressing force spiral or FRP presstressed reinforcing steels.
A FRP tendons and a regular reinforcement are placed in same bellows simultaneously, for two vertical muscle geometry positions are accurately positioned
It puts, the vertical muscle locating support of design perforation（13）.It is vertical along vertical muscle, place a locating support every 2 ~ 5 meters（13）, you can ensure
FRP tendons are basically unchanged with common vertical position of the muscle in bellows.
Present invention comparison prior art has the following advantages：
In bridge pier provided by the present invention, the FRP tendons with outstanding corrosion resistance are located at outside, and easily by Chloride Attack
Regular reinforcement is located inside so that the thickness of concrete cover of regular reinforcement dramatically increases, and has largely postponed common
The initial corrosion time of reinforcing bar, so as to significantly improve the durability of bridge pier.
The present invention longitudinal reinforcement by the relatively low regular reinforcement of yield point and elasticity and intensity it is higher FRP tendons mixing and
Into, rigidity after yield of pier is remarkably improved, so as to reduce bridge pier maximum displacement response and its discreteness under seismic stimulation, and
Bridge pier self-resetting capability is effectively improved, reduces residual deformation after shake, improves functionality after bridge structure shake.
By adjusting regular reinforcement and FRP steel allocation ratio, it can be achieved that after surrender bearing capacity, surrender to bridge pier just
Effective control of degree, peak value bearing capacity and limiting displacement drift, so as to fulfill the design under the more performance standards of bridge pier.
The present invention carry bridge pier itself have protrusion hysteretic energy ability, can effectively absorb and dissipate earthquake when be input to
The energy of bridge structure, there is no need in addition set energy-consumption damper or shock isolating pedestal, so as to reduce bridge construction cost.
Bridge pier is indulged muscle and is wrapped up by high-strength grout, and still has metal bellows and stirrup restraint except grouting material, therefore on ground
Compressive buckling destruction will not generally occur for vertical muscle under shake effect；It on the other hand, can by the high-strength grout that metal bellows constrains
With participating in being pressurized together with concrete, thus concrete compression stress level with it is relatively low, extent of the destruction is little.Therefore it is proposed by the present invention
It is small that difficulty is repaired after bridge pier shake, helps to realize the fast quick-recovery of disaster area bridge transportation network.
It is simple in assembled process that the present invention carries bridge pier, and performance accuracy is of less demanding during to assembly；And when transport and lifting
Without large scale equipment, construction is flexible, efficient, helps to realize bridge Fast Construction.
Description of the drawings
Fig. 1 is hybrid reinforcement section assembling bridge pier diagrammatic cross-section described in embodiment 1；
Fig. 2 is hybrid reinforcement section assembling bridge pier cross-sectional view described in embodiment 1；
Fig. 3 is that vertical muscle locating support schematic diagram is penetrated through described in embodiment 1；
Fig. 4 is hybrid reinforcement section assembling bridge pier cross-sectional view described in embodiment 2；
Fig. 5 is hybrid reinforcement section assembling bridge pier diagrammatic cross-section described in embodiment 3.
The label of each component is as follows in attached drawing：1. cushion cap；2. assembled pier shaft；3. presstressed reinforcing steel anchorage groove；4. prefabricated section
Section；5. reserved ripple duct；6. the vertical muscle of perforation；7. unbonded prestressing tendon；8. presstressed reinforcing steel duct；9. metal bellows；10.
Regular reinforcement；11.FRP muscle；12. stirrup；13. the vertical muscle locating support of perforation.
Specific embodiment
Below in conjunction with attached drawing detailed description of the present invention embodiment, the invention will be further described.Phase in each attached drawing
With the identical element of label expression.The following examples are exemplary, it is intended to explain the present invention, and it is not intended that this
The limitation of invention.
Embodiment 1, as shown in Figure 1, the Precast Concrete Segmental Bridges bridge pier of a kind of mixed configuration FRP tendons of the present invention and regular reinforcement
System, including concrete bearing platform（1）, assembled pier shaft（2）, the vertical muscle of perforation（6）And unbonded prestressing tendon（7）.Assembled pier shaft by
A certain number of prefabricated subsections（4）It vertically stacks together, and passes through unbonded prestressing tendon（7）It is whole that tensioning becomes bridge pier.Respectively
Prefabricated subsection（4）The circular and cross -section identical for sectional dimension, and segmental height is identical.Segmental height is section long edge sizeTimes, bridge pier plastic hinge can so fully carried out with ensure energy dissipation ability and make single segment volume and
Weight is small and easy to assembly.Each prefabricated subsection（4）There is the reserved ripple duct of identical quantity in same cross-sectional location arrangements
（5）.Therefore, it can ensure that reserved ripple duct after assembly（5）And presstressed reinforcing steel duct（8）Up/down perforation.Treat each prefabricated subsection（4）
Assembly is completed and the complete presstressed reinforcing steel of tensioning（6）Afterwards, by the vertical muscle of perforation（7）The reserved ripple duct of merging.If the single vertical muscle of perforation（7）
Length is less than pier shaft height, then to penetrating through vertical muscle by way of being mechanically connected, welding or bind connection（7）Carry out spreading.It passes through
Logical vertical muscle（7）It is mixed by FRP tendons and regular reinforcement, the two ratio of reinforcement ratio is between 0.5 ~ 2.0.Two kinds of mixed configuration is vertical
Muscle can effectively improve the post-yield stiffness of bridge pier, and bridge pier anti-seismic performance and self-resetting capability are improved so as to comprehensive.Importantly,
As shown in Fig. 2, corrosion resistant FRP tendons are located at outside on section, the regular reinforcement of corrosion-vulnerable is located inside, so can be notable
Improve the durability of bridge pier.The geometric position of two vertical muscle during to ensure construction in same bellows is consistent with design, along vertical
Muscle is vertical, and a locating support is placed every 2 ~ 5 meters（13）, the locating support is as shown in Figure 3.To be placed into the vertical muscle of perforation（7）It
Afterwards, to reserving ripple duct（5）Carry out pressure grouting, it is ensured that grouting is full closely knit.The vertical muscle of perforation receives around grouting material, metal
Bellows（9）And stirrup（12）Constraint, therefore be not susceptible under geological process the damage that is pressurized.Moreover, because grouting material
Resistance to compression is cooperateed with, coagulation soil compressive stress and Plastic Damage are little during earthquake.Therefore such bridge pier has resistance to better than cast-in-place bridge pier
It is functional after long property and shake, help to reduce bridge inspection and maintenance cost, realize the quick construction of bridge, it is ensured that important bridge structure
It is unimpeded after shake.
Embodiment 2, as shown in figure 4, the present embodiment is with previous embodiment 1, the difference lies in bridge pier is rectangular thin-wall
Hollow section, section four corners use circular metal bellows（9）Reserved ripple duct（5）, remaining uses flat metal
Bellows reserves ripple duct.A FRP tendons are only placed in each round reserved ripple duct, are placed simultaneously in each flat ripple duct
A piece FRP tendons and a regular reinforcement.When the Precast Concrete Segmental Bridges bridge pier of mixed configuration FRP tendons and regular reinforcement is rectangular thin-wall
During hollow section, using the arrangement of reinforcement section, arrangement may be such that FRP tendons close to section edges, so as to more fully utilize
FRP tendons tensile strength improves rigidity after yield of pier；Simultaneously, it is ensured that regular reinforcement has larger protective layer thickness, significantly extends
The initial corrosion time, effectively improve durability of the bridge pier in erosion environment.
Embodiment 3, as shown in figure 5, the present embodiment is with previous embodiment 1, the difference lies in FRP tendons and regular reinforcements
Several segments in assembled pier shaft lower part are only penetrated through, without being arranged along entire pier shaft.For jutting-off-pier, pier bottom moment of flexure under geological process
Maximum is gradually reduced from the upward moment of flexure of pier bottom.According to bridge pier Bending moment distribution during Aseismic Design, ripping circular saw can be gradually decreased,
And it is finally blocked at certain reasonable altitudes.Rebar truncated position determines to meet corresponding earthquake resistant design code regulation.By
In FRP tendons unit length cost higher than regular reinforcement, therefore when general mixed configuration FRP tendons and the Precast Concrete Segmental Bridges of regular reinforcement
When the height of bridge pier is larger, FRP tendons dosage and general can be effectively reduced under the premise of ensureing that anti-seismic performance is constant using this scheme
Logical amount of reinforcement, significantly improves economic benefit, and help to improve construction efficiency.
Finally illustrate, above example is merely to illustrate technical scheme of the present invention and unrestricted.
Claims (10)
1. a kind of assembled concrete pier system of mixed configuration FRP tendons and regular reinforcement, including concrete bearing platform 1, assembled pier shaft
2nd, vertical muscle 6 and unbonded prestressing tendon 7 are penetrated through；It is characterized in that：The assembly pier shaft 2 is by one or more than one prefabricated section
Section 4 forms, and the vertical muscle 6 of perforation is mixed by two kinds of reinforcing bars of FRP tendons and regular reinforcement, and with unbonded prestressing tendon 7 one
Complete pier system is connected to become with by concrete bearing platform 1, assembled pier shaft 2.
2. a kind of assembled concrete pier system of mixed configuration FRP tendons and regular reinforcement, including concrete bearing platform 1, assembled pier shaft
2nd, vertical muscle 6 and unbonded prestressing tendon 7 are penetrated through；It is characterized in that：The assembly pier shaft 2 is by two or more prefabricated sections
Section 4 forms, and the vertical muscle 6 of perforation is mixed by two kinds of reinforcing bars of FRP tendons and regular reinforcement, and with unbonded prestressing tendon 7 one
Complete pier system is connected to become with by concrete bearing platform 1, assembled pier shaft 2, FRP tendons only penetrate through assembled pier shaft lower part with regular reinforcement
Several segments, without being arranged along entire pier shaft.
3. the assembled concrete pier system of a kind of mixed configuration FRP tendons according to claim 1 or claim 2 and regular reinforcement, special
Sign is：The upper and lower end face of each prefabricated subsection 4 is is plane or setting shear key.
4. the assembled concrete pier system of a kind of mixed configuration FRP tendons according to claim 1 or claim 2 and regular reinforcement, special
Sign is：The reserved ripple duct 5 of concrete bearing platform 1, each prefabricated subsection 4, same bellows is interior to place a FRP tendons simultaneously
With a regular reinforcement.
5. according to a kind of mixed configuration FRP tendons of claims 1 or 2 or 3 or 4 and the assembled concrete pier body of regular reinforcement
System, it is characterised in that：Regular reinforcement is planar located at the inside of FRP tendons.
6. a kind of mixed configuration FRP tendons and the assembled concrete pier system of regular reinforcement, feature according to claim 1-5
It is：The type of regular reinforcement used in the vertical muscle 6 of perforation is HRB400, HRB500, HRBF400, HRBF500, HRB400E,
HRB500E、HRBF400E、HRBF500E；The type of FRP tendons used in the vertical muscle 6 of perforation is BFRP tendons, CFRP tendons, GFRP tendons and
AFRP tendons.
7. a kind of mixed configuration FRP tendons and the assembled concrete pier system of regular reinforcement, feature exist according to claim 5
In：The anchoring lower ends of unbonded prestressing tendon 7 are in concrete bearing platform 1, and muscle beam sequentially passes through each prefabricated subsection 4 during bridge pier assembly
In reserve inner wall smooth presstressed reinforcing steel duct 8, muscle beam upper anchorage is in presstressed reinforcing steel anchorage groove 3.
8. the assembled concrete pier system of a kind of mixed configuration FRP tendons according to claim 1 or claim 2 and regular reinforcement, special
Sign is：Presstressed reinforcing steel type used in unbonded prestressing tendon 7 is steel strand wires, prestressing force spiral or FRP presstressed reinforcing steels.
9. the assembled concrete pier system of a kind of mixed configuration FRP tendons according to claim 1 or claim 2 and regular reinforcement, special
Sign is：FRP tendons and regular reinforcement mix ratio of reinforcement ratio between 0.5 ~ 2.0, are planar arranged symmetrically.
10. the assembled concrete pier system of a kind of mixed configuration FRP tendons according to claim 1 or claim 2 and regular reinforcement, special
Sign is：Assembled pier shaft is rectangular thin-wall hollow section, and section four corners reserve ripple duct using circular metal bellows 9
5, remaining reserves ripple duct using flat metal bellows, and a FRP tendons are only placed in each round reserved ripple duct, each flat
A FRP tendons and a regular reinforcement are placed in shape ripple duct simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810110415.2A CN108252203A (en) | 2018-02-05 | 2018-02-05 | A kind of assembled concrete pier system of mixed configuration FRP tendons and regular reinforcement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810110415.2A CN108252203A (en) | 2018-02-05 | 2018-02-05 | A kind of assembled concrete pier system of mixed configuration FRP tendons and regular reinforcement |
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Cited By (7)
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| CN108914765A (en) * | 2018-08-15 | 2018-11-30 | 石家庄铁道大学 | A kind of replaceable assembled damping bridge pier |
| WO2019149271A1 (en) * | 2018-02-05 | 2019-08-08 | 横琴共轭科技有限公司 | Assembled concrete pier system having mixed configuration of frp ribs and regular steel ribs |
| CN110241714A (en) * | 2019-07-12 | 2019-09-17 | 北京交通大学 | A kind of Self-resetting precast assembly bridge pier and its construction method |
| CN112922236A (en) * | 2021-02-01 | 2021-06-08 | 浙江理工大学 | Assembled concrete prefabricated column and assembling method thereof |
| CN113084997A (en) * | 2021-04-13 | 2021-07-09 | 北部湾大学 | Method for restraining FRP (fiber reinforced plastic) reinforced concrete beam by FRP cloth |
| CN113202016A (en) * | 2020-03-14 | 2021-08-03 | 中国铁路设计集团有限公司 | Prefabricated assembled hollow pier suitable for high-earthquake area and construction method |
| CN114370020A (en) * | 2022-01-25 | 2022-04-19 | 湘潭大学 | Self-resetting anti-collision guardrail and installation method thereof |
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Cited By (10)
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| WO2019149271A1 (en) * | 2018-02-05 | 2019-08-08 | 横琴共轭科技有限公司 | Assembled concrete pier system having mixed configuration of frp ribs and regular steel ribs |
| US11926976B2 (en) | 2018-02-05 | 2024-03-12 | Hengqin Gonge Technology Co., Ltd. | Precast segmental pier reinforced with both FRP bars and conventional steel bars |
| CN108914765A (en) * | 2018-08-15 | 2018-11-30 | 石家庄铁道大学 | A kind of replaceable assembled damping bridge pier |
| CN108914765B (en) * | 2018-08-15 | 2020-03-13 | 石家庄铁道大学 | Replaceable assembled shock-absorbing pier |
| CN110241714A (en) * | 2019-07-12 | 2019-09-17 | 北京交通大学 | A kind of Self-resetting precast assembly bridge pier and its construction method |
| CN113202016A (en) * | 2020-03-14 | 2021-08-03 | 中国铁路设计集团有限公司 | Prefabricated assembled hollow pier suitable for high-earthquake area and construction method |
| CN112922236A (en) * | 2021-02-01 | 2021-06-08 | 浙江理工大学 | Assembled concrete prefabricated column and assembling method thereof |
| CN113084997A (en) * | 2021-04-13 | 2021-07-09 | 北部湾大学 | Method for restraining FRP (fiber reinforced plastic) reinforced concrete beam by FRP cloth |
| CN114370020A (en) * | 2022-01-25 | 2022-04-19 | 湘潭大学 | Self-resetting anti-collision guardrail and installation method thereof |
| CN114370020B (en) * | 2022-01-25 | 2024-03-08 | 湘潭大学 | Self-resetting crash barrier and installation method thereof |
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