CN114991388A - Reinforced concrete composite column containing mixed steel bars and construction method - Google Patents
Reinforced concrete composite column containing mixed steel bars and construction method Download PDFInfo
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- CN114991388A CN114991388A CN202210833572.2A CN202210833572A CN114991388A CN 114991388 A CN114991388 A CN 114991388A CN 202210833572 A CN202210833572 A CN 202210833572A CN 114991388 A CN114991388 A CN 114991388A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 167
- 239000010959 steel Substances 0.000 title claims abstract description 167
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 45
- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 title claims abstract description 9
- 239000004567 concrete Substances 0.000 claims abstract description 39
- 239000011374 ultra-high-performance concrete Substances 0.000 claims abstract description 32
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 18
- 239000011229 interlayer Substances 0.000 claims description 11
- 230000002787 reinforcement Effects 0.000 claims description 8
- 238000009415 formwork Methods 0.000 claims description 3
- 230000001788 irregular Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000006399 behavior Effects 0.000 abstract description 2
- 230000009977 dual effect Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 15
- 238000000034 method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000556 factor analysis Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
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- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a reinforced concrete composite column containing mixed steel bars and a construction method, and belongs to the field of building structures. The concrete combined column of the reinforced steel bar component is introduced, and the stripping and crushing behaviors of the ultra-high performance concrete in the corrugated steel pipe are limited; the embedded steel bar is supported by the lateral direction of the concrete in the pipe and the external corrugated steel pipe, and the buckling phenomenon is difficult to occur under the compression effect, so that the exertion of the compression bearing capacity of the steel bar and the improvement of the ductility are ensured. On the other hand, due to the corrugated shape of the inner and outer concave-convex parts of the corrugated steel pipe, a strong interlocking effect is achieved between the corrugated steel pipe and the concrete, and the pipeline is prevented from being separated from the concrete. Under the dual constraints of the corrugated steel pipe and the steel bar, the transverse expansion deformation of the ultra-high performance concrete is effectively inhibited, and the strength and the ductility are greatly improved. The invention solves the problem of column failure caused by the buckling of the longitudinal steel bars of the common reinforced concrete column under pressure.
Description
Technical Field
The invention belongs to the field of building structures, and particularly relates to a reinforced concrete composite column containing mixed steel bars and a construction method.
Background
The concrete column is the most basic load-bearing member in engineering structure, and the reinforced concrete structure is one of the most widely applied structural forms, and the existing reinforced concrete column has limited bearing capacity, and the bearing capacity demand is continuously improved in the face of the continuous increase of building height. Under the action of earthquake, the longitudinal steel bars of the common reinforced concrete columns are pressed and bent, and in addition, in the common reinforced concrete frame structure, the damage and failure of the columns are one of important reasons for causing the damage and collapse of the whole structure. Therefore, improving the performance of the reinforced concrete column in all aspects is one of the important links for realizing the optimization of the performance of the whole structure.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a reinforced concrete composite column containing mixed steel bars and a construction method.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a reinforced concrete composite column containing mixed steel bars comprises a common concrete column body, wherein a plurality of mixed steel bars are arranged at equal heights in the common concrete column body, the mixed steel bars are arranged at the outer edge of the common concrete column body, and a plurality of transverse stirrups are arranged at different heights on the periphery of the mixed steel bars;
the mixed steel bar is composed of an embedded steel bar, an ultra-high performance concrete interlayer and a corrugated steel pipe, the corrugated steel pipe is sleeved on the periphery of the embedded steel bar, and the ultra-high performance concrete interlayer is arranged between the embedded steel bar and the corrugated steel pipe.
Furthermore, steel bars are arranged in the common concrete column body at the same height, and the steel bars and the mixed steel bars are arranged at the outer edge of the common concrete column body.
Further, the reinforcing steel bars and the mixed reinforcing steel bars are alternately arranged.
Further, the top of embedded reinforcing bar is flushed in corrugated steel pipe.
Further, the diameter of the corrugated steel pipe is not more than 100 mm.
Furthermore, the section of the common concrete column body is square, circular or special-shaped.
Furthermore, the corrugated steel pipe and the embedded steel bar are concentrically arranged.
Further, the ultra-high performance concrete interlayer is made of UHPC ultra-high performance concrete.
A construction method of a reinforced concrete composite column containing mixed steel bars comprises the following steps:
(1) vertically arranging the corrugated steel pipe, concentrically placing and fixing the embedded steel bar and the corrugated steel pipe, filling an ultrahigh-performance concrete interlayer in a gap between the corrugated steel pipe and the embedded steel bar, leveling the corrugated steel pipe and the common concrete at the port, maintaining and prefabricating a reinforced longitudinal mixed steel bar assembly;
(2) and binding the reinforced longitudinal mixed steel bar assembly and the transverse stirrups into a steel reinforcement cage, and erecting a formwork.
(3) And pouring common concrete.
Compared with the prior art, the invention has the following beneficial effects:
the reinforced concrete composite column containing the mixed steel bars and the construction method thereof introduce the concrete composite column of the reinforced steel bar assembly, and the peeling and crushing behaviors of the ultra-high performance concrete in the corrugated steel pipe are limited; the embedded steel bar is supported by the lateral direction of the concrete in the pipe and the external corrugated steel pipe, and the buckling phenomenon is difficult to occur under the compression effect, so that the exertion of the compression bearing capacity of the steel bar and the improvement of the ductility are ensured. On the other hand, because the corrugated steel pipe is in an inner concave-convex corrugated shape and an outer concave-convex corrugated shape, a strong interlocking effect is achieved between the corrugated steel pipe and the concrete, the pipeline and the concrete are prevented from being separated, higher compression-resistant bearing capacity can be provided, and the tensile property of the mixed steel bar can be improved through the embedded steel bar. Meanwhile, the normal ultrahigh-performance concrete can generate transverse expansion deformation when bearing longitudinal load, and brittle failure is easy to occur. Under the dual constraints of the corrugated steel pipe and the steel bar, the transverse expansion deformation of the ultra-high performance concrete is effectively inhibited, and the strength and the ductility are greatly improved. Adopt mixed reinforcing bar can also reduce the whole bucking of reinforcing bar. Specifically, adopt embedded steel bar corrugated steel pipe restraint ultrahigh performance concrete, the corrugated steel pipe wall plays the hoop restraint effect to the concrete, improves the bearing capacity and the ductility of post greatly, and corresponding can reduce cross sectional area. The invention solves the problem of column failure caused by the buckling of the longitudinal steel bar of the common reinforced concrete column under pressure, and obviously improves the bearing capacity and the ductility of the member; and, under the same steel content, can use smaller post cross-sectional area, produce bigger building and use the space.
Furthermore, embedded steel bars in the mixed steel bars extend out of the corrugated steel pipe, so that the embedded steel bars can be conveniently connected and anchored.
Drawings
Fig. 1 is a schematic cross-sectional view of a reinforced concrete composite column with mixed reinforcing bars.
Fig. 2 is a schematic view of a three-dimensional structure of a reinforced concrete composite column of mixed steel bars.
Fig. 3 is a layout view of hybrid steel bars and transverse stirrups in the reinforced concrete composite column of hybrid steel bars.
FIG. 4 is a schematic cross-sectional view of a reinforced concrete composite column including mixed rebars and reinforcing steel.
Fig. 5 is a perspective view illustrating a reinforced concrete composite column including mixed reinforcing bars and reinforcing steel bars.
Fig. 6 is a layout view of reinforcing bars and transversal stirrups in a reinforced concrete composite column comprising mixed reinforcing bars and reinforcing bars.
Fig. 7 is a schematic structural view of a hybrid rebar, in which fig. 7(a) is a cross-sectional view of the hybrid rebar and fig. 7(b) is an elevation view of the hybrid rebar.
FIG. 8 is an axial load-displacement curve of the composite column of the present invention after finite element analysis of a common steel reinforced concrete column of the same steel content.
In the figure: 1 is built-in reinforcing steel bar, 2 is the ultra-high performance concrete intermediate layer, 3 is corrugated steel pipe, 4 is ordinary concrete column, 5 is horizontal stirrup, 6 is longitudinal reinforcement.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention includes two reinforcement modes, a mixed reinforcement component is used for replacing all longitudinal reinforcements or replacing part of the longitudinal reinforcements, and the invention is further described in detail with reference to the attached drawings as follows:
example 1
Referring to fig. 1, 2 and 3, fig. 1 is a schematic cross-sectional view of a reinforced concrete composite column of mixed steel bars, fig. 2 is a schematic three-dimensional structure of a reinforced concrete composite column of mixed steel bars, and fig. 3 is a schematic view of mixed steel bars and transverse stirrups in the reinforced concrete composite column of mixed steel bars; the reinforced concrete combined column of the mixed reinforcing steel bars comprises a common concrete column body 4, wherein a plurality of mixed reinforcing steel bars are arranged in the common concrete column body 4 in a penetrating mode, the mixed reinforcing steel bars are arranged at the outer edge of the common concrete column body 4, transverse stirrups 5 are arranged at different heights on the periphery of the mixed reinforcing steel bars, each mixed reinforcing steel bar is composed of an embedded reinforcing steel bar 1, an ultrahigh-performance concrete interlayer 2 and a corrugated steel pipe 3, the corrugated steel pipe 3 is sleeved on the periphery of the embedded reinforcing steel bar 1, the ultrahigh-performance concrete interlayer 2 is arranged between the embedded reinforcing steel bars and the corrugated steel pipe 3, the top of the embedded reinforcing steel bar 1 is higher than the corrugated steel pipe 3, and the corrugated steel pipe 3 and the embedded reinforcing steel bar 1 are concentrically arranged.
The UHPC ultra-high performance concrete is a special engineering material with ultra-high strength, toughness and high durability, and has good application prospect in the fields of national defense engineering, ocean engineering, nuclear industry, special security and protection engineering and municipal engineering. The test proves that the flexural strength of the concrete is 3 times of that of the common concrete C50, and the shrinkage change is reduced by 50%.
Referring to fig. 7, fig. 7 is a schematic structural view of a hybrid steel bar, wherein fig. 7(a) is a cross-sectional view of the hybrid steel bar, and fig. 7(b) is an elevation view of the hybrid steel bar, and the corrugated steel pipe in the hybrid steel bar hardly transmits longitudinal load, but can realize circumferential uniform constraint, thereby improving the strength and ductility of the core ultra-high performance concrete. The corrugated steel pipe of the steel bar is used for restraining the ultra-high performance concrete as the longitudinal steel bar, so that the defect of integral buckling of the steel bar of the common reinforced concrete column is overcome, and the ductility of the column is improved.
In the invention, the small-diameter corrugated steel pipe is arranged only at the edge part, the diameter of the corrugated steel pipe is not more than 100mm, and high-fluidity materials such as ultra-high performance concrete are adopted to fill the gap between the corrugated steel pipe and the reinforcing steel bar, so that the ultra-high performance concrete is easy to generate brittle failure when bearing longitudinal load. In the invention, under the double constraints of the corrugated steel pipe 3 and the embedded steel bar 1, the transverse deformation of the ultra-high performance concrete 2 is inhibited, the strength and the ductility are greatly improved, and the defect that the ultra-high performance concrete is easy to be subjected to brittle failure is overcome.
Example 2
Referring to fig. 4, 5 and 6, fig. 4 is a schematic cross-sectional view of a reinforced concrete composite column including mixed rebars and reinforcing bars, fig. 5 is a schematic perspective view of a reinforced concrete composite column including mixed rebars and reinforcing bars, and fig. 6 is a schematic view of mixed rebars and transverse stirrups in a reinforced concrete composite column including mixed rebars and reinforcing bars; the reinforced concrete combined column with the mixed steel bars comprises a common concrete column body 4, wherein a plurality of mixed steel bars and steel bars penetrate through the interior of the common concrete column body 4, the mixed steel bars and the steel bars are arranged at the outer edge of the common concrete column body 4 and extend to the top of the common concrete column body 4, the mixed steel bars and the steel bars are alternately arranged, the mixed steel bars are composed of embedded steel bars 1, ultrahigh-performance concrete interlayers 2 and corrugated steel pipes 3, the corrugated steel pipes 3 are sleeved on the periphery of the embedded steel bars 1, the ultrahigh-performance concrete interlayers 2 are arranged between the embedded steel bars and the corrugated steel pipes 3, the tops of the embedded steel bars 1 are flush with the corrugated steel pipes 3, and the corrugated steel pipes 3 and the embedded steel bars 1 are concentrically arranged.
Referring to fig. 8, fig. 8 is a graph showing axial load-displacement curves of the combined column and the general reinforced concrete column of the present invention with the same size and steel content by using a finite element method, wherein the design of the components enables the cross-sectional areas of the corrugated pipe 3 and the embedded steel bar 1 to be superposed and the cross-sectional area of the solid steel bar to be the same, so as to ensure the same steel content, and the axial pressure performance of the combined column after the solid steel bar is replaced by the mixed steel bar is analyzed by performing single factor analysis. The numerical simulation result shows that the ultimate bearing capacity of the combined column is about 3 times of that of a common concrete column, the bearing capacity of the combined column in the later loading stage is slightly increased due to the constraint action of the internal corrugated pipe 3 and the embedded steel bar 1, and finally the ductility of the combined column is obviously superior to that of the common reinforced concrete column and has a good ductility coefficient.
In other embodiments, the steel bars in the mixed steel bars can be concentrically arranged with the corrugated steel pipe and can also be eccentrically arranged, and the embedded steel bars mainly play a role in tensile strength.
A construction method of a reinforced concrete composite column containing mixed steel bars comprises the following steps:
with the vertical setting of corrugated steel pipe 3, place and fix embedded reinforcing bar 1 and corrugated steel pipe 3 with the concentricity, at corrugated steel pipe 3 and the clearance filling ultra high performance concrete intermediate layer 2 between embedded reinforcing bar 1, corrugated steel pipe 3 and ordinary concrete are leveled at the port department, and the maintenance is prefabricated into the vertical mixed reinforcing bar subassembly of reinforcing, and figure 5 is consulted to the example.
And binding the reinforced longitudinal mixed steel bar assembly and the transverse stirrups 5 into a steel reinforcement cage, and erecting a formwork.
And (5) pouring common concrete.
The section form of the reinforced concrete composite column can be any one of square, round or special-shaped columns. In this embodiment, the combined column has a square cross-sectional form.
The reinforced concrete composite column can achieve higher bearing capacity and ductility under the condition of the same steel content.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (9)
1. The reinforced concrete combination column containing the mixed steel bars is characterized by comprising a common concrete column body (4), wherein a plurality of mixed steel bars are arranged in the common concrete column body (4) at equal height, the mixed steel bars are all arranged at the outer edge of the common concrete column body (4), and a plurality of transverse stirrups (5) are arranged at different heights on the periphery of the mixed steel bars;
the hybrid steel bar is composed of an embedded steel bar (1), an ultra-high performance concrete interlayer (2) and a corrugated steel pipe (3), wherein the corrugated steel pipe (3) is sleeved on the periphery of the embedded steel bar (1), and the ultra-high performance concrete interlayer (2) is arranged between the embedded steel bar and the corrugated steel pipe.
2. The reinforced concrete composite column with mixed steel bars as claimed in claim 1, wherein the steel bars (6) are also arranged in the common concrete column body (4) at the same height, and the steel bars (6) and the mixed steel bars are arranged at the outer edge of the common concrete column body (4).
3. The reinforced concrete composite column containing hybrid steel bars as claimed in claim 2, wherein the steel bars (6) and the hybrid steel bars are alternately arranged.
4. A reinforced concrete composite column containing hybrid steel bars as claimed in claim 1 or 2, wherein the tops of the embedded steel bars (1) are flush with the corrugated steel pipe (3).
5. The reinforced concrete composite column containing hybrid steel rods as claimed in claim 1 or 2, wherein the corrugated steel pipes (3) have a diameter of not more than 100 mm.
6. The reinforced concrete composite column containing hybrid steel bars as claimed in claim 1 or 2, wherein the section of the general concrete column body (4) is square, circular or irregular.
7. The reinforced concrete composite column containing mixed reinforcing steel according to claim 1 or 2, wherein the corrugated steel pipe (3) and the embedded reinforcing steel (1) are concentrically arranged.
8. The reinforced concrete composite column containing hybrid steel bars as claimed in claim 1 or 2, wherein the ultra high performance concrete sandwich (2) is made of UHPC ultra high performance concrete.
9. The construction method of a reinforced concrete composite column containing hybrid steel bars as set forth in claim 1, comprising the steps of:
(1) vertically arranging a corrugated steel pipe (3), concentrically placing and fixing an embedded steel bar (1) and the corrugated steel pipe (3), filling a gap between the corrugated steel pipe (3) and the embedded steel bar (1) with an ultrahigh-performance concrete interlayer (2), leveling the port of the corrugated steel pipe (3) and common concrete, maintaining and prefabricating a reinforced longitudinal mixed steel bar assembly;
(2) binding the reinforced longitudinal mixed steel bar assembly and the transverse stirrups (4) into a steel reinforcement cage, and erecting a formwork;
(3) and pouring common concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210833572.2A CN114991388A (en) | 2022-07-15 | 2022-07-15 | Reinforced concrete composite column containing mixed steel bars and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210833572.2A CN114991388A (en) | 2022-07-15 | 2022-07-15 | Reinforced concrete composite column containing mixed steel bars and construction method |
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| CN114991388A true CN114991388A (en) | 2022-09-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493602A (en) * | 2011-11-29 | 2012-06-13 | 东南大学 | Ductile concrete column capable of delaying local buckling of steel bars and manufacturing method thereof |
| CN203066356U (en) * | 2013-03-07 | 2013-07-17 | 重庆大学 | Reinforced concrete column with local buckling constraint of longitudinal bars |
| CN103924737A (en) * | 2014-04-12 | 2014-07-16 | 北京工业大学 | Reinforced concrete columns with unbonded end parts and unequal strength |
| CN105442753A (en) * | 2015-12-23 | 2016-03-30 | 清华大学 | Reinforcing steel bar component |
| CN106958319A (en) * | 2016-01-08 | 2017-07-18 | 中国建筑科学研究院 | Precast concrete post component and connected node |
| US20170241140A1 (en) * | 2016-02-18 | 2017-08-24 | The Hong Kong Polytechnic University | Reinforcing members for concrete structures |
| CN111395655A (en) * | 2020-03-05 | 2020-07-10 | 南京林业大学 | Sleeve-constrained reinforced concrete-reinforced seawater sea sand concrete structure |
| CN216690087U (en) * | 2021-12-20 | 2022-06-07 | 上海模卡建筑工程科技发展有限公司 | Core column is irritated to bellows through-hole |
| CN217811929U (en) * | 2022-07-15 | 2022-11-15 | 西安建筑科技大学 | Reinforced concrete composite column containing mixed steel bars |
-
2022
- 2022-07-15 CN CN202210833572.2A patent/CN114991388A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493602A (en) * | 2011-11-29 | 2012-06-13 | 东南大学 | Ductile concrete column capable of delaying local buckling of steel bars and manufacturing method thereof |
| CN203066356U (en) * | 2013-03-07 | 2013-07-17 | 重庆大学 | Reinforced concrete column with local buckling constraint of longitudinal bars |
| CN103924737A (en) * | 2014-04-12 | 2014-07-16 | 北京工业大学 | Reinforced concrete columns with unbonded end parts and unequal strength |
| CN105442753A (en) * | 2015-12-23 | 2016-03-30 | 清华大学 | Reinforcing steel bar component |
| CN106958319A (en) * | 2016-01-08 | 2017-07-18 | 中国建筑科学研究院 | Precast concrete post component and connected node |
| US20170241140A1 (en) * | 2016-02-18 | 2017-08-24 | The Hong Kong Polytechnic University | Reinforcing members for concrete structures |
| CN111395655A (en) * | 2020-03-05 | 2020-07-10 | 南京林业大学 | Sleeve-constrained reinforced concrete-reinforced seawater sea sand concrete structure |
| CN216690087U (en) * | 2021-12-20 | 2022-06-07 | 上海模卡建筑工程科技发展有限公司 | Core column is irritated to bellows through-hole |
| CN217811929U (en) * | 2022-07-15 | 2022-11-15 | 西安建筑科技大学 | Reinforced concrete composite column containing mixed steel bars |
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