CN108755964B - Partially prefabricated assembly type steel concrete mixing column and construction method - Google Patents
Partially prefabricated assembly type steel concrete mixing column and construction method Download PDFInfo
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- CN108755964B CN108755964B CN201810630820.7A CN201810630820A CN108755964B CN 108755964 B CN108755964 B CN 108755964B CN 201810630820 A CN201810630820 A CN 201810630820A CN 108755964 B CN108755964 B CN 108755964B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/185—Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
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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
- E04C3/32—Columns; Pillars; Struts of metal
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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
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Abstract
The invention discloses a partially prefabricated and assembled steel reinforced concrete mixed column by adopting the idea of partially prefabricated and assembled and partially cast-in-place, which comprises a prefabricated high-performance concrete hollow column; the longitudinal bars, the section steel and the steel plates are arranged in the prefabricated high-performance concrete hollow column along the column length direction, wherein the steel plates are arranged on the section steel to form a honeycomb hollow structure; stirrups laid at equal intervals; filling cast-in-place concrete in the central cavity of the prefabricated high-performance concrete hollow column; the end plates and the high-strength bolts are arranged at two ends of the upper prefabricated high-performance concrete hollow column and the lower prefabricated high-performance concrete hollow column along the column length direction; the invention also provides a construction method of the concrete. The invention has the advantages of light dead weight, high bearing capacity, no need of internal formwork, construction speed improvement, construction site structure assembly difficulty reduction, improvement on the deformation capability of the member in the transportation and hoisting processes, reduction in hoisting difficulty and the like, and fully enhances the stress performance and the service performance of part of prefabricated assembly type steel concrete members.
Description
Technical Field
The invention belongs to the technical field of buildings, and particularly relates to a partially prefabricated assembly type steel concrete mixing column and a construction method.
Background
A Steel Reinforced Concrete Structure (also known as Steel Reinforced Concrete Structure) is called a Steel Reinforced Concrete Structure or a Reinforced Concrete Structure, referred to as SRC Structure for short, and is a Structure in which Steel sections are disposed in Concrete and certain longitudinal Steel bars and stirrups are disposed in the Concrete. Compared with a steel structure, the reinforced concrete is wrapped outside the steel reinforced concrete structure, so that the plane torsional buckling performance of the section steel can be obviously improved, and the durability and the fire resistance of the structure are improved; compared with a reinforced concrete structure, the section steel concrete structure can effectively reduce the section size and improve the earthquake resistance. Steel reinforced concrete structures are favored by engineers for their superior stress performance and relatively low economic cost. The steel-concrete structure in China is rapidly developed and widely developed and applied in the fields of super high-rise buildings, large-span structures, heavy-load industrial buildings and the like, and the steel-concrete structure is adopted in projects such as Guangzhou international automobile mansions, Shanghai world financial mansions, Xian information center mansions, Shanghai Senmao mansions, Shanghai Jinmao financial centers, Shanghai world global financial centers and the like. However, the construction process of the steel reinforced concrete structure is multiple and the structural connection is complex, so that the popularization and the application of the steel reinforced concrete structure are greatly restricted.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a partially prefabricated assembly type steel concrete mixed column and a construction method, the idea of casting a partially prefabricated assembly part in situ is adopted, the steel concrete mixed column prefabricated in a factory can be installed and poured with concrete on site, and is connected with an upper column and a lower column through end plates and high-strength bolts, and can also be connected with an overhanging steel beam, a beam and a plate through the high-strength bolts, so that the steel concrete mixed column is suitable for the requirements of various engineering conditions, and is simple in construction, low in cost and excellent in performance.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a prefabricated assembly shaped steel concrete hybrid column in part, its characterized in that includes:
prefabricating a high-performance concrete hollow column 1;
the section steel 3 is arranged in the prefabricated high-performance concrete hollow column 1 along the column length direction;
a steel plate 4 arranged on the section steel 3 in the prefabricated high-performance concrete hollow column 1 along the column length direction;
the stirrups 5 are laid on the cross section of the prefabricated high-performance concrete hollow column 1 at equal intervals, wherein the longitudinal reinforcements 2 and the section steel 3 are positioned in the surrounding of the stirrups 5;
the cast-in-place concrete 6 is filled in a central cavity in the prefabricated high-performance concrete hollow column 1;
and the number of the first and second groups,
and the high-strength bolt 8 is arranged on the end plate 7 and used for connecting the adjacent prefabricated high-performance concrete hollow columns 1.
The section steel 3 is I-shaped steel or formed by two I-shaped steels in a crossed and staggered manner.
The section steel 3 extends out of two ends of the prefabricated high-performance concrete hollow column 1 in the column length direction.
And the steel plates 4 are arranged on the section steel 3 along the column length direction in a welding mode to form an annular honeycomb hollow structure.
The stirrup 5 is a welded composite stirrup or a continuous spiral high-strength stirrup.
The concrete adopted by the cast-in-place common concrete 6 is common concrete, recycled concrete, lightweight aggregate concrete, rubber concrete, sound absorption concrete or heat preservation and insulation concrete.
The end plates 7 are welded on the extended section steel 3 and the steel plate 4 and are connected with the high-strength bolts 8 through welding.
The invention also provides a construction method of the partially prefabricated assembly type steel concrete mixing column, which comprises the following steps:
1) in a factory, arranging a steel plate 4 on the section steel 3 along the column length direction in a welding mode to form an annular honeycomb hollow structure; welding end plates 7 at two ends of an annular honeycomb hollow structure formed by the section steel 3 and the steel plates 4; a high-performance concrete hollow column 1 is cast on the outer side of an annular honeycomb hollow structure formed by the steel plate 4 and the section steel 3, and longitudinal bars 2 and stirrups 5 are arranged to complete a prefabricated part;
2) installing a prefabricated high-performance concrete hollow column 1 with longitudinal ribs 2, section steel 3, steel plates 4, stirrups 5 and end plates 7 on site; connecting an end plate 7 arranged at the lower end of the upper prefabricated high-performance concrete hollow column 1 and an end plate 7 arranged at the upper end of the lower prefabricated high-performance concrete hollow column 1 with a high-strength bolt 8 through welding;
3) pouring cast-in-place ordinary concrete 6 into a honeycomb cavity in the center of a prefabricated high-performance concrete hollow column 1 at the lower part on site to form a steel concrete mixed column;
4) in the field, the end plate 7 is directly connected with the combined column or the steel column through welding and a high-strength bolt 8; the steel beam is connected with the high-strength bolt through the overhanging steel beam.
Compared with the prior art, the invention has the beneficial effects that:
1) the construction process is simple. All parts of the partially prefabricated and assembled steel reinforced concrete mixing column are prefabricated and produced in a factory, the section steel and the steel plate form an annular honeycomb hollow structure, and the step of internal formwork erecting in the process of pouring the high-performance concrete hollow column is omitted. In a construction site, the prefabricated upper and lower columns are connected through welding of end plates and high-strength bolts, and then the inner hollow part of the lower high-performance concrete hollow column is poured, namely the formed steel concrete mixed column is formed. And (3) welding the end plate of the prefabricated part with the node or the steel column through the perforated steel plate and connecting the perforated steel plate with the high-strength bolt, so that the construction and installation of the steel concrete mixed column are completed. Compared with the traditional steel concrete column construction and installation, the steel bar binding, formwork erecting, formwork removing and temporary support under the column erection are not needed on site. Through reasonable design, the construction and installation of the steel reinforced concrete mixed column are convenient and quick as steel columns, and the construction performance is greatly improved.
2) The construction quality is excellent. In the construction of traditional shaped steel concrete column, because shaped steel concrete column construction process is many, the construction degree of difficulty is big, often appear in the shaped steel concrete column web concrete vibration poor, the concrete intensity is not enough and quality problems such as reinforcing bar dislocation in the post, the construction quality is difficult to control. And in the part prefabricated assembly type steel concrete mixing column, the high performance concrete hollow column is prefabricated for the mill, and concrete placement vibrates conveniently and can adopt steam curing, and concrete construction quality easily controls, and especially when adopting high performance concrete, the part prefabricated assembly type steel concrete mixing column advantage is more obvious in the aspect of construction quality control.
3) The bearing capacity and the comprehensive function are improved. The lower part of the section steel concrete mixed column is in a region with large stress, common concrete is poured in the column, an annular honeycomb hollow structure formed by the section steel and the steel plates can generate annular constraint force on the concrete in a core area, a prefabricated high-performance concrete hollow column can generate annular constraint force on internal section steel, the steel plates welded inside participate in the bearing of the column, and meanwhile, lateral constraint force is provided for the section steel, so that the bearing capacity of the column is greatly improved; the internal section steel and the steel plate are welded to form an annular honeycomb hollow structure, so that the step of internal formwork erecting in the construction process is omitted, the dead weight of the structure can be effectively reduced, and the overall performance and the anti-seismic performance of the structure are improved; in the steel reinforced concrete mixing column, high-performance concrete can be adopted in the prefabricated part, common strength concrete is adopted in the cast-in-place part, and the strength grades of the concrete can be different. Therefore, in practical engineering application, the floor concrete can be selected without being limited by the strength of concrete in the column, various types of concrete with different characteristics are selected, and the using function requirements of the structure are effectively improved. For example, for the cast-in-place part of concrete of the steel reinforced concrete mixing column, the recycled concrete can be adopted to save resources and energy; the dead weight can also be reduced by adopting lightweight aggregate concrete; rubber concrete or sound absorption concrete can be adopted to improve the vibration reduction and sound insulation effects; thermal insulation concrete can be used to improve the thermal insulation performance.
Generally speaking, compared with the traditional steel concrete column, the partially prefabricated assembled steel concrete mixed column simplifies the construction process and the construction difficulty, can effectively solve the key problem of restricting the popularization and the application of the traditional steel concrete column for a long time, can fully exert and effectively promote the obvious advantages of the traditional steel concrete column in the aspects of stress performance, durability, fire resistance, economic performance and the like, can be widely applied to various reinforced concrete and steel structure buildings, and is particularly suitable for super high-rise, large-span structures and heavy-load industrial buildings. Therefore, deep research is carried out on the partially prefabricated steel reinforced concrete mixing column to promote the popularization and the application of the partially prefabricated steel reinforced concrete mixing column, and the method has great practical engineering significance.
Drawings
FIG. 1 is a schematic structural view of a partially prefabricated assembly type steel concrete mixing column according to the present invention.
Fig. 2 is a front elevation view of a partially prefabricated assembly type steel reinforced concrete hybrid column according to the present invention.
FIG. 3 is a schematic cross-sectional view of the partially prefabricated assembly type steel-concrete hybrid column A-A according to the present invention
FIG. 4 is a schematic cross-sectional view of a partially prefabricated assembly type steel reinforced concrete mixing column B-B according to the present invention.
FIG. 5 is a schematic cross-sectional view of a partially prefabricated assembly type steel reinforced concrete mixing column C-C according to the present invention.
FIG. 6 is a schematic cross-sectional view of a partially prefabricated assembly steel reinforced concrete mixing column perforated end plate of the present invention.
FIG. 7 is a schematic view showing the connection of a partially prefabricated assembly type steel reinforced concrete mixing column and a steel beam according to the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
The partially prefabricated assembly type steel concrete mixing column adopts the idea of casting a part of the prefabricated assembly part in situ, consists of a prefabricated part and a cast-in-situ part, and comprises the following components as shown in figures 1 to 5:
prefabricating a high-performance concrete hollow column 1; longitudinal bars 2 arranged in the prefabricated high-performance concrete hollow column 1 along the column length direction; the section steel 3 is arranged in the prefabricated high-performance concrete hollow column 1 along the column length direction; a steel plate 4 arranged on the section steel 3 in the prefabricated high-performance concrete hollow column 1 along the column length direction; the stirrups 5 are laid on the cross section of the prefabricated high-performance concrete hollow column 1 at equal intervals, wherein the longitudinal reinforcements 2 and the section steel 3 are positioned in the surrounding of the stirrups 5; the cast-in-place concrete 6 is filled in a central cavity in the prefabricated high-performance concrete hollow column 1; end plates 7 arranged at two ends of the prefabricated high-performance concrete hollow column 1; and a high-strength bolt 8 provided on the end plate 7. The prefabricated high-performance concrete hollow column 1, the longitudinal ribs 2, the section steel 3, the steel plates 4, the stirrups 5 and the end plates 7 form a prefabricated part, and the cast-in-place part is mainly cast-in-place concrete 6.
The section steel 3 is formed by two I-shaped steels in a crossed and staggered manner, the section steel 3 extends out of two ends of the prefabricated high-performance concrete hollow column 1 in the column length direction, and the steel plate 4 is arranged on the section steel 3 in the column length direction in a welding mode to form an annular honeycomb-shaped hollow structure. The stirrup 5 is a welded composite stirrup or a continuous spiral high-strength stirrup. The concrete adopted by the cast-in-place common concrete 6 can be common concrete, recycled concrete, lightweight aggregate concrete, rubber concrete, sound absorption concrete or heat preservation and insulation concrete according to different requirements. The end plate 7 is a perforated end plate, is welded on the extended section steel 3 and the steel plate 4, is arranged at the end plate 7 at the lower end of the upper prefabricated high-performance concrete hollow column 1 and the end plate 7 at the upper end of the lower prefabricated high-performance concrete hollow column 1 along the column length direction, and is connected with the high-strength bolt 8 through welding.
The prefabricated high-performance concrete hollow column 1, the longitudinal ribs 2, the section steel 3, the steel plates 4, the stirrups 5 and the end plates 7 are prefabricated and molded at one time in a factory to obtain the prefabricated assembly section steel concrete hollow column. Conveying the formed prefabricated assembly type steel concrete hollow column to a construction site, connecting an upper end plate and a lower end plate through welding and high-strength bolts, and pouring internal concrete to form a formed steel concrete mixed column; and then spliced with columns, beams and the like. The invention adopts the idea of partial prefabrication and assembly, and can obtain more integral performance.
The concrete construction method of the invention comprises the following steps:
1) in a factory, arranging a steel plate 4 on the section steel 3 along the column length direction in a welding mode to form an annular honeycomb hollow structure; welding end plates 7 at two ends of an annular honeycomb hollow structure formed by the section steel 3 and the steel plates 4; a high-performance concrete hollow column 1 is cast on the outer side of an annular honeycomb hollow structure formed by the steel plate 4 and the section steel 3, and longitudinal bars 2 and stirrups 5 are arranged to complete a prefabricated part;
2) installing a prefabricated high-performance concrete hollow column 1 with longitudinal ribs 2, section steel 3, steel plates 4, stirrups 5 and end plates 7 on site; connecting an end plate 7 arranged at the lower end of the upper prefabricated high-performance concrete hollow column 1 and an end plate 7 arranged at the upper end of the lower prefabricated high-performance concrete hollow column 1 with a high-strength bolt 8 through welding;
3) pouring cast-in-place ordinary concrete 6 into a honeycomb cavity in the center of a prefabricated high-performance concrete hollow column (1) at the lower part on site to form a steel concrete mixed column;
4) in the field, the end plate 7 is directly connected with the combined column or the steel column through welding and a high-strength bolt 8; the steel beam is connected with the high-strength bolt through the overhanging steel beam.
In conclusion, the partially prefabricated and assembled section steel concrete mixed column adopts high-performance concrete, has better durability and ductility, can generate annular constraint force on the internal section steel by the prefabricated high-performance concrete hollow column, is stressed by the internally welded steel plates, and provides lateral constraint force for the section steel and the internally cast concrete, so that the bearing capacity of the column steel is greatly improved, and the section steel and the steel plates provide a certain function of preventing lateral damage to the prefabricated high-performance concrete hollow column.
The internal section steel and the steel plate are welded to form the annular honeycomb hollow structure, so that the step of internal formwork erecting in the construction process is omitted, the dead weight of the structure can be effectively reduced, the overall performance and the anti-seismic performance of the structure are improved, the deformability of the member in the transportation and hoisting processes is improved, the hoisting difficulty is reduced, the comprehensive enhancement of the stress performance and the service performance of the prefabricated section steel concrete member is realized, and the novel efficient partially prefabricated assembly section steel concrete mixed column technology is formed. The partially prefabricated and assembled steel reinforced concrete mixed column technology provided by the invention has a plurality of remarkable performance advantages of convenient construction, wide applicability, light structure dead weight, high bearing capacity, good anti-seismic performance and the like, can be widely applied to various reinforced concrete engineering structures such as buildings, plants, bridge columns and the like, has wide application prospect, and has important engineering practice significance and social and economic benefits.
Claims (7)
1. The utility model provides a prefabricated assembly shaped steel concrete hybrid column in part, its characterized in that includes:
prefabricating a high-performance concrete hollow column (1);
longitudinal bars (2) arranged in the prefabricated high-performance concrete hollow column (1) along the column length direction;
the section steel (3) is arranged in the prefabricated high-performance concrete hollow column (1) along the column length direction;
a steel plate (4) arranged on the section steel (3) in the prefabricated high-performance concrete hollow column (1) along the column length direction;
the stirrups (5) are laid on the cross section of the prefabricated high-performance concrete hollow column (1) at equal intervals, and the longitudinal reinforcements (2) and the section steel (3) are both surrounded by the stirrups (5);
the cast-in-place concrete (6) is filled in a central cavity in the prefabricated high-performance concrete hollow column (1);
end plates (7) arranged at the upper end and the lower end of the prefabricated high-performance concrete hollow column (1);
and the number of the first and second groups,
the high-strength bolt (8) is arranged on the end plate (7) and used for connecting the adjacent prefabricated high-performance concrete hollow columns (1);
the steel plates (4) are arranged on the section steel (3) along the column length direction in a welding mode to form an annular honeycomb hollow structure;
the end plates (7) are welded on the extended section steel (3) and the steel plates (4) and are connected with the high-strength bolts (8) through welding.
2. The partially prefabricated assembled steel reinforced concrete hybrid column according to claim 1, wherein said section steel (3) is an i-steel.
3. The partially prefabricated assembled steel reinforced concrete mixing column according to claim 1, wherein said section steel (3) is composed of two i-beams crisscrossed.
4. The partially prefabricated assembled steel reinforced concrete hybrid column according to claim 1, 2 or 3, wherein the section steel (3) is protruded from both ends of the prefabricated high performance concrete hollow column (1) in the column length direction.
5. The partially prefabricated assembly type steel concrete mixing column according to claim 1, wherein the stirrup (5) is a welded composite stirrup or a continuous spiral high-strength stirrup.
6. The partially prefabricated assembly type steel concrete mixing column according to claim 1, wherein the concrete adopted by the cast-in-place concrete (6) is ordinary concrete, recycled concrete, lightweight aggregate concrete, rubber concrete, sound absorption concrete or thermal insulation concrete.
7. The construction method of the partially prefabricated assembled steel reinforced concrete mixing column according to claim 1, characterized by comprising the following steps:
1) in a factory, arranging steel plates (4) on the section steel (3) along the column length direction in a welding mode to form an annular honeycomb hollow structure; welding end plates (7) at two ends of an annular honeycomb hollow structure formed by the section steel (3) and the steel plates (4); pouring a high-performance concrete hollow column (1) on the outer side of an annular honeycomb hollow structure formed by the steel plate (4) and the section steel (3) through a formwork, and arranging longitudinal bars (2) and stirrups (5) to finish a prefabricated part;
2) the method comprises the following steps of installing a prefabricated high-performance concrete hollow column (1) with longitudinal ribs (2), section steel (3), steel plates (4), stirrups (5) and end plates (7) on site; connecting an end plate (7) arranged at the lower end of the upper prefabricated high-performance concrete hollow column (1) with an end plate (7) arranged at the upper end of the lower prefabricated high-performance concrete hollow column (1) through welding and a high-strength bolt (8);
3) pouring cast-in-place concrete (6) into a honeycomb cavity in the center of a prefabricated high-performance concrete hollow column (1) at the lower part on site to form a steel concrete mixed column;
4) in the field, the end plate (7) is directly connected with the combined column or the steel column through welding and a high-strength bolt (8); the steel beam is connected with the high-strength bolt through the overhanging steel beam.
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| CN109208822B (en) * | 2018-11-10 | 2024-01-05 | 福建工程学院 | Assembled multi-cavity concrete filled steel tube column and construction method |
| CN110512799B (en) * | 2019-08-28 | 2021-10-01 | 北京工业大学 | Laminated core-added column for underground frame structure and construction method thereof |
| CN111502127A (en) * | 2020-04-27 | 2020-08-07 | 三峡大学 | Upright column module for prefabricating embedded honeycomb cell structure |
| CN114718186A (en) * | 2022-03-10 | 2022-07-08 | 东南大学 | Steel reinforced concrete column-steel beam assembly type structure locally adopting ECC (error correction code) and assembly method |
| CN114809445B (en) * | 2022-04-28 | 2024-03-08 | 广东睿住住工科技有限公司 | Modularized steel column installation method and modularized steel column assembly |
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| JPS51113321A (en) * | 1975-03-31 | 1976-10-06 | Nippon Kokan Kk | Octagonal steel pipe pillar that concrete is filled |
| JPH0673785A (en) * | 1992-08-25 | 1994-03-15 | Kawasaki Steel Corp | Steel framed reinforced concrete column and construction of this column and steel skeleton beam |
| JP2005220699A (en) * | 2004-02-09 | 2005-08-18 | Shimizu Corp | Reinforcement structure of existing column and reinforcing method for the same |
| JP4649283B2 (en) * | 2005-07-21 | 2011-03-09 | Ｊｆｅエンジニアリング株式会社 | Columnar structure, pier or foundation pile using shape steel, and manufacturing method thereof |
| JP2008138366A (en) * | 2006-11-30 | 2008-06-19 | Daiwa House Ind Co Ltd | Structure and method for joining reinforced concrete column/steel-frame beam |
| CN201593238U (en) * | 2009-10-16 | 2010-09-29 | 北京建筑工程学院 | Steel reinforced concrete column-steel beam horizontal shear plate composite joint |
| CN103437425A (en) * | 2013-08-27 | 2013-12-11 | 陕西建科兴业钢结构有限公司 | Connecting joint of prefabricated hollow steel-reinforced concrete column and steel beam and construction method |
| CN103924741B (en) * | 2014-04-10 | 2016-08-17 | 北京工业大学 | Band cross constraint batten plate box-shaped reinforcing bar confined concrete models and the practice |
| KR20160070023A (en) * | 2014-12-08 | 2016-06-17 | (주)영구조엔지니어링 | Combination structure for centrifugal casting high strength pc concrete complex columns using steel pipe |
| CN104652705B (en) * | 2014-12-22 | 2017-03-22 | 西安建筑科技大学 | Prefabricated and assembly type steel reinforced concrete column with high-performance concrete frame and construction method |
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| CN107299683B (en) * | 2017-06-02 | 2019-03-29 | 长安大学 | Compound concrete-filled tubular column assembled docks node and connection method |
| CN208501895U (en) * | 2018-06-19 | 2019-02-15 | 西安建筑科技大学 | A kind of partial precast assembly steel reinforced concrete mixed column |
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