CN110017035A - A kind of precast prestressed bean column node method and structure of mixed-fiber reinforced concrete reinforcing - Google Patents
A kind of precast prestressed bean column node method and structure of mixed-fiber reinforced concrete reinforcing Download PDFInfo
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- CN110017035A CN110017035A CN201910377855.9A CN201910377855A CN110017035A CN 110017035 A CN110017035 A CN 110017035A CN 201910377855 A CN201910377855 A CN 201910377855A CN 110017035 A CN110017035 A CN 110017035A
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- 235000010627 Phaseolus vulgaris Nutrition 0.000 title claims abstract description 30
- 244000046052 Phaseolus vulgaris Species 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000011210 fiber-reinforced concrete Substances 0.000 title claims abstract description 19
- 230000003014 reinforcing effect Effects 0.000 title claims description 16
- 239000004567 concrete Substances 0.000 claims abstract description 58
- 239000000835 fiber Substances 0.000 claims abstract description 31
- 239000004743 Polypropylene Substances 0.000 claims abstract description 28
- 229920001155 polypropylene Polymers 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 239000004033 plastic Substances 0.000 claims abstract description 12
- 230000002787 reinforcement Effects 0.000 claims abstract description 10
- 238000013461 design Methods 0.000 claims abstract description 9
- 238000005498 polishing Methods 0.000 claims abstract description 8
- 238000005553 drilling Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims 1
- 238000011549 displacement method Methods 0.000 abstract description 2
- 230000001771 impaired effect Effects 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 238000010276 construction Methods 0.000 description 7
- 238000005728 strengthening Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000007596 consolidation process Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229920006253 high performance fiber Polymers 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- HTMIBDQKFHUPSX-UHFFFAOYSA-N methdilazine Chemical group C1N(C)CCC1CN1C2=CC=CC=C2SC2=CC=CC=C21 HTMIBDQKFHUPSX-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
Abstract
The present invention relates to a kind of mixed-fiber reinforced concretes to reinforce precast prestressed bean column node method and structure, comprising the following steps: carries out support with the steel pipe support beam bottom portion undamaged in the cast-in-place column two sides of precast prestressed bean column node；The diagonal zones of the concrete of beam-ends plastic hinge affected area are polished with drilling machine；Shear key is set at intact beam-ends cross-sectional area and core space section, and carries out dabbing processing at shear key both ends；The region after polishing is poured with steel-polypropylene fiber concrete, subregion is carried out in beam-ends plastic hinge affected area and diagonally replaces, vibrate when pouring；Covering and moisture-keeping maintaining are carried out to the region poured；It after region wait pour reaches the 80% of design strength, polishes remaining area, and the region after polishing is poured with steel-polypropylene fiber concrete, while vibrating when pouring, to complete to replace；It reinforces and completes when remaining area reaches Design of Reinforcement intensity.This method is directly directly replaced impaired concrete with steel-polypropylene fiber concrete displacement method.
Description
Technical field
The present invention relates to a kind of mixed-fiber reinforced concretes to reinforce precast prestressed bean column node method and structure.
Background technique
Existing reinforcement means usually carries out reinforce or external direct after grinding process to damaged location
The problem of being reinforced, not accounting for the connection of its new-old concrete, site operation and durability aspect.November 24 in 2017
Day, state knew that office discloses a kind of " the reinforcement of concrete post method based on Green High Performance fiber reinforced cement-based composite material " hair
Bright patent application (notification number are as follows: 107382187 A of CN), the disclosed technical scheme steps of the patent application are: using drilling machine
It chisels out and destroys the concrete that rear pillar surface loosens, expose solid structure sheaf, removal of impurities processing is carried out to column surface, cleans up floating dust
With the stone of loosening；In plastic hinge region formwork supporting plate；Cylinder is washed away with water before pouring, column is made to keep moisture state and is deposited without circulating water
?；Certain thickness GHPFRCC is poured in column plastic hinge region, vibrates when pouring, it is closely knit to guarantee that GHPFRCC is poured；It has poured
Simultaneously moisture-keeping maintaining, form removal after moisture-keeping maintaining 7d are covered in 12h.The invention locally replaces former structure using GHPFRCC
The concrete that part is destroyed implements local stiffening to reinforced column.Its advantage in the case where big column cross-section size is not added,
The bearing capacity of concrete column can be increased substantially, but its new-old concrete junction is not handled, may will affect and add
Gu effect.
On December 1st, 2017 Granted publication " it is a kind of it is damaged after Steel Reinforced Concrete Beam-column Joints carbon cloth reinforced knot
The utility model patent (notification number are as follows: 206693664 U of CN) of structure ", which includes steel reinforced concrete connected vertically
Column and reinforced beam and its junction formation joint cores, the front-rear side walls of profile steel concrete column are pasted with several respectively
First carbon cloth of layer strip, length direction stretching, extension and its both ends and steel of first carbon cloth along institute's reinforced beam
The corresponding front side wall of Concrete Beam Reinforced or rear wall are pasted, and the top and bottom sidewall of reinforced beam is pasted with several layers strip respectively
Second carbon cloth of shape, the second carbon cloth after profile steel concrete column straight up or extend downwardly and with fashioned iron coagulation
The left side wall or right side wall of earth pillar are pasted, and the beam column end of joint cores is anchored with annular carbon fiber hoop.Advantage is by carbon fiber
Wei Bu forms the closed space being made of completely carbon cloth in joint cores and binds round, while strengthening joint core
Area, node beam-ends, node styletable, but carbon cloth endurance quality is limited.
2018 Nian9Yue25 states know that office discloses a kind of " beams of concrete column reinforcing method " application for a patent for invention (notification number
Are as follows: 108571180 A of CN), the disclosed technical solution of the patent application is: by resin and curing agent in high-pressure spray gun
Beam column built from concrete is sprayed to after mixing and waits for reinforcing area, while chopped strand is ejected to reinforcing area by optical fiber cutting apparatus,
The mixed liquor of resin and curing agent is mixed with chopped strand in region surface to be reinforced.A kind of beam column built from concrete that the invention provides
Reinforcement means, using sprayed construction technique, fiber and resinous polymer directly with out-of-flatness, complexity or irregular body structure surface
Firm connection, can be in the integral reinforcing layer of the node surface of complex shape one good mechanical properties of formation.Its advantage is that injection
Chopped strand be random distribution, the stress of any direction can be born, but need the machinery of large jet concrete.
Summary of the invention
The purpose of the present invention is to provide a kind of mixed-fiber reinforced concretes to reinforce precast prestressed bean column node method and knot
Structure, this method handle the connection between new-old concrete by shear key, directly use steel-polypropylene fiber concrete displacement method
Impaired concrete is directly replaced.
Technical program of the present invention lies in: a kind of precast prestressed bean column node method of mixed-fiber reinforced concrete reinforcing, packet
Include following steps:
(1) support is carried out with the steel pipe support beam bottom portion undamaged in the cast-in-place column two sides of precast prestressed bean column node；
(2) diagonal zones of the concrete of beam-ends plastic hinge affected area are polished with drilling machine；
(3) shear key is set at intact beam-ends cross-sectional area and core space section, and is carried out at dabbing at shear key both ends
Reason；
(4) region after polishing is poured with steel-polypropylene fiber concrete, is divided in beam-ends plastic hinge affected area
Region is diagonally replaced, and is vibrated when pouring, it is ensured that steel-polypropylene fiber concrete pours closely knit；
(5) covering and moisture-keeping maintaining are carried out to the region poured；
(6) it after the region wait pour reaches the 80% of design strength, polishes remaining area, and with steel-polypropylene fibre
Concrete pours the region after polishing, while vibrating when pouring, to complete to replace；
(7) it reinforces and completes when remaining area reaches Design of Reinforcement intensity.
Further, the region poured and remaining area carry out covering and moisture-keeping maintaining pouring respectively in 12h.
Further, in the step (6), before replacing to remaining area, dabbing need to be carried out to previous replacement areas
Processing.
A kind of mixed-fiber reinforced concrete for reinforcing precast prestressed bean column node method production using mixed-fiber reinforced concrete
Reinforce precast prestressed beam-column node structure, cast-in-place column including precast prestressed bean column node and be located at cast-in-place column two sides and on
End face is provided with the precast beam of Bars In Poured Concrete Slab, and the vertically integrated face of the Prefabricated bar end section and the two sides of prefabricated post are vertically integrated
Face is respectively arranged with shear key, pours between the vertically integrated face of the Prefabricated bar end section and the vertically integrated face of prefabricated post
There is steel-polypropylene fiber concrete.
Further, the steel reinforcement cage of cast-in-place column is provided through on the Bars In Poured Concrete Slab.
Further, the precast beam positioned at prefabricated post side is provided with protrude into steel-polypropylene fiber concrete pre- and answers
Power muscle, cast-in-place column is provided through in prefabricated post side steel-polypropylene fiber concrete, and to protrude into prefabricated post other side steel-poly-
Presstressed reinforcing steel in tacryl concrete.
Compared with prior art, the invention has the following advantages that
The connection between new-old concrete is handled by shear key, and the company between new-old concrete is handled by shear key
It connects, steel-polypropylene fiber concrete reinforces precast prestressed bean column node, it is existing that damaged region mostly occurs in beam-ends
Area is poured, beam column can be linked to be to by precast prestressed node using the area Hou Jiao the method pair of whole feature concrete replacement
Damaged cast-in-place region is reinforced, obtained under the premise of most economical preferable consolidation effect and can be not added it is heavy in section
Under the premise of raising bearing capacity by a relatively large margin.The advantage of joint reinforcing construction stage is reinforced stage by stage using subregion, can be with
The requirement of bearing capacity when meeting its displacement prevents from generating in construction operation dangerous.Steel-polypropylene fibre advantage is steel fibre
Component strength and bearing capacity can be improved, polypropylene fibre can play the effect that resistance is split, and fiber divides at random in concrete
Cloth can bear the power of any direction.The advantage of shear key is can effectively to increase the connection of new-old concrete.The reinforcing side
Method project cost is low, simple process, carries out consolidation process to the precast prestressed bean column node region damaged after shake, reduces and rebuild
Required manpower financial capacity.
Detailed description of the invention
Fig. 1 is precast prestressed bean column node；
Fig. 2 is precast prestressed bean column node damage plan；
Fig. 3 is precast prestressed bean column node strengthening construction front view of the invention；
Fig. 4 is beam construction sectional view of the invention；
Fig. 5 is shear key schematic diagram of the invention；
Fig. 6 is precast prestressed bean column node strengthening construction top view of the invention；
Fig. 7 is that precast prestressed bean column node of the invention reinforces subregion displacement top view；
Fig. 8 is precast prestressed bean column node strengthening construction top view of the invention
Fig. 9 is assembled beam-column joint reinforcing front view of the invention；
Figure 10 is assembled beam-column joint reinforcing area schematic diagram of the invention；
In figure: the cast-in-place column 6- presstressed reinforcing steel 7- Cast-in-situ Beam of the 1- Bars In Poured Concrete Slab vertically integrated face 5- of 2- precast beam 3- shear key 4-
Hold plastic hinge region 8- beam-ends plastic hinge damage zone 9- steel-vertical dabbing 11- steel pipe support of polypropylene fibre stabilization zone 10-
One 13- replacement areas of 12- replacement areas, two 14- dabbing.
Specific embodiment
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and cooperate attached drawing, make detailed
It is carefully described as follows, but the present invention is not limited thereto.
Referring to figs. 1 to Figure 10
A kind of precast prestressed bean column node method of mixed-fiber reinforced concrete reinforcing, comprising the following steps:
(1) support, such as Fig. 3 are carried out with the steel pipe support beam bottom portion undamaged in the cast-in-place column two sides of precast prestressed bean column node
It is shown；
(2) diagonal zones of the concrete of beam-ends plastic hinge affected area are polished with drilling machine, as shown in Figure 4；
(3) shear key is set at intact beam-ends cross-sectional area and core space section, and is carried out at dabbing at shear key both ends
Reason, shear key are as shown in Figure 5；
(4) region after polishing is poured with steel-polypropylene fiber concrete, is divided in beam-ends plastic hinge affected area
Region is diagonally replaced, and is vibrated when pouring, it is ensured that steel-polypropylene fiber concrete pour it is closely knit, as shown in Figure 7；
(5) to the region poured pour carried out in 12h covering and moisture-keeping maintaining；
(6) after the region wait pour reaches the 80% of design strength, dabbing processing is carried out to previous replacement areas, is increased successive
Contact area between replacement areas plays better consolidation effect, to replace to remaining area；
(7) it polishes remaining area, and the region after polishing is poured with steel-polypropylene fiber concrete, simultaneously
It vibrates when pouring, and carries out covering and moisture-keeping maintaining in 12h pouring, to complete to replace, as shown in Figure 8；
(8) it reinforces and completes when remaining area reaches Design of Reinforcement intensity, i.e., dismountable steel pipe support, as shown in Figure 9 and Figure 10.
To by that can be reinforced to precast prestressed bean column node region with displacement concrete strengthening method.
A kind of mixed-fiber reinforced concrete for reinforcing precast prestressed bean column node method production using mixed-fiber reinforced concrete
Reinforce precast prestressed beam-column node structure, cast-in-place column 5 including precast prestressed bean column node and be located at cast-in-place column two sides and
Upper surface is provided with the precast beam 2 of Bars In Poured Concrete Slab 1, and the vertically integrated face 4 of the Prefabricated bar end section and the two sides of prefabricated post are perpendicular
It is respectively arranged with shear key 3 to faying face, the shear key is the recess portion to concave, the vertical knot of the Prefabricated bar end section
Steel-polypropylene fiber concrete has been poured between conjunction face and the vertically integrated face of prefabricated post.
In the present embodiment, the steel reinforcement cage of cast-in-place column is provided through on the Bars In Poured Concrete Slab, to guarantee bonding strength.
In the present embodiment, the precast beam positioned at prefabricated post side be provided with protrude into it is pre- in steel-polypropylene fiber concrete
Stress rib 6 is provided through cast-in-place column in prefabricated post side steel-polypropylene fiber concrete and protrudes into the prefabricated post other side
Presstressed reinforcing steel 6 in steel-polypropylene fiber concrete, to guarantee that displacement zone can preferably be completed with precast beam and cast-in-place column
Connection.
The foregoing is merely presently preferred embodiments of the present invention, for the ordinary skill in the art, according to this hair
Bright introduction designs the precast prestressed bean column node method of various forms of mixed-fiber reinforced concretes reinforcings and does not need to create
Property labour, it is all without departing from the principles and spirit of the present invention impartial to become according to what scope of the present invention patent was done
Change, modification, replacement and variant, is all covered by the present invention.
Claims (6)
1. a kind of mixed-fiber reinforced concrete reinforces precast prestressed bean column node method, which comprises the following steps:
(1) support is carried out with the steel pipe support beam bottom portion undamaged in the cast-in-place column two sides of precast prestressed bean column node；
(2) diagonal zones of the concrete of beam-ends plastic hinge affected area are polished with drilling machine；
(3) shear key is set at intact beam-ends cross-sectional area and core space section, and is carried out at dabbing at shear key both ends
Reason；
(4) region after polishing is poured with steel-polypropylene fiber concrete, is divided in beam-ends plastic hinge affected area
Region is diagonally replaced, and is vibrated when pouring, it is ensured that steel-polypropylene fiber concrete pours closely knit；
(5) covering and moisture-keeping maintaining are carried out to the region poured；
(6) it after the region wait pour reaches the 80% of design strength, polishes remaining area, and with steel-polypropylene fibre
Concrete pours the region after polishing, while vibrating when pouring, to complete to replace；
(7) it reinforces and completes when remaining area reaches Design of Reinforcement intensity.
2. a kind of mixed-fiber reinforced concrete according to claim 1 reinforces precast prestressed bean column node method, feature
It is, the region poured and remaining area carry out covering and moisture-keeping maintaining pouring respectively in 12h.
3. a kind of mixed-fiber reinforced concrete according to claim 1 or 2 reinforces precast prestressed bean column node, feature exists
In, in the step (6), before being replaced to remaining area, need to previous replacement areas carry out dabbing processing.
4. a kind of using a kind of precast prestressed bean column node method production of mixed-fiber reinforced concrete reinforcing described in claim 1
Mixed-fiber reinforced concrete reinforce precast prestressed beam-column node structure, which is characterized in that including precast prestressed bean column node
Cast-in-place column and positioned at cast-in-place column two sides and upper surface is provided with the precast beam of Bars In Poured Concrete Slab, which is characterized in that the Prefabricated bar
The vertically integrated face in two sides in the vertically integrated face and prefabricated post of end section is respectively arranged with shear key, the Prefabricated bar end section
Vertically integrated face and prefabricated post vertically integrated face between poured steel-polypropylene fiber concrete.
5. a kind of mixed-fiber reinforced concrete according to claim 4 reinforces precast prestressed beam-column node structure, feature
It is, the steel reinforcement cage of cast-in-place column is provided through on the Bars In Poured Concrete Slab.
6. a kind of mixed-fiber reinforced concrete according to claim 4 or 5 reinforces precast prestressed beam-column node structure, special
Sign is that the precast beam positioned at prefabricated post side is provided with the presstressed reinforcing steel protruded into steel-polypropylene fiber concrete, is located at pre-
Cast-in-place column is provided through in column side steel-polypropylene fiber concrete processed, and to protrude into prefabricated post other side steel-polypropylene fibre mixed
Presstressed reinforcing steel in solidifying soil.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910377855.9A CN110017035B (en) | 2019-05-08 | 2019-05-08 | Method and structure for reinforcing precast prestressed beam and column joints by mixed fiber concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910377855.9A CN110017035B (en) | 2019-05-08 | 2019-05-08 | Method and structure for reinforcing precast prestressed beam and column joints by mixed fiber concrete |
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| CN110017035A true CN110017035A (en) | 2019-07-16 |
| CN110017035B CN110017035B (en) | 2023-12-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021773A (en) * | 2019-12-26 | 2020-04-17 | 中北大学 | Method for reinforcing residential building with concrete frame structure for civil construction |
| CN111980151A (en) * | 2020-09-01 | 2020-11-24 | 湖南大学 | Cast-in-place square column precast square beam concrete frame node |
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| JP2015021312A (en) * | 2013-07-19 | 2015-02-02 | 株式会社ジェイアール総研エンジニアリング | Reinforcement structure for columnar structure |
| CN105625572A (en) * | 2016-02-29 | 2016-06-01 | 东南大学 | Prefabricated prestressed concrete frame beam-column joint making disparate use of high performance materials |
| CN108798053A (en) * | 2018-05-31 | 2018-11-13 | 昆明理工大学 | A kind of method that ECC reinforces damaged frame Structure Beam-column node |
| CN109488039A (en) * | 2019-01-04 | 2019-03-19 | 烟台大学 | Adjustable diameter and screw adjusting jack reinforced column substitution reinforcement structure and its reinforcement means built in a kind of |
| CN210134666U (en) * | 2019-05-08 | 2020-03-10 | 福州大学 | Prefabricated prestressed beam column node structure reinforced by mixed fiber concrete |
-
2019
- 2019-05-08 CN CN201910377855.9A patent/CN110017035B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015021312A (en) * | 2013-07-19 | 2015-02-02 | 株式会社ジェイアール総研エンジニアリング | Reinforcement structure for columnar structure |
| CN105625572A (en) * | 2016-02-29 | 2016-06-01 | 东南大学 | Prefabricated prestressed concrete frame beam-column joint making disparate use of high performance materials |
| CN108798053A (en) * | 2018-05-31 | 2018-11-13 | 昆明理工大学 | A kind of method that ECC reinforces damaged frame Structure Beam-column node |
| CN109488039A (en) * | 2019-01-04 | 2019-03-19 | 烟台大学 | Adjustable diameter and screw adjusting jack reinforced column substitution reinforcement structure and its reinforcement means built in a kind of |
| CN210134666U (en) * | 2019-05-08 | 2020-03-10 | 福州大学 | Prefabricated prestressed beam column node structure reinforced by mixed fiber concrete |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021773A (en) * | 2019-12-26 | 2020-04-17 | 中北大学 | Method for reinforcing residential building with concrete frame structure for civil construction |
| CN111980151A (en) * | 2020-09-01 | 2020-11-24 | 湖南大学 | Cast-in-place square column precast square beam concrete frame node |
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| CN110017035B (en) | 2023-12-01 |
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Effective date of registration: 20231208 Address after: Room 264, 2nd Floor, Building 1, Binjiang Plaza, No. 78 Rujiang East Road, Mawei Town, Mawei District, Fuzhou City, Fujian Province, 350015 Patentee after: Xiuyi (Fujian) Landscape Engineering Co.,Ltd. Address before: No.2 Xueyuan Road, Fuzhou University Town, Shangjie Town, Minhou County, Fuzhou City, Fujian Province Patentee before: FUZHOU University |