KR20120058696A - On-site Joint of the Prefabricated Re-bar Column to Re-bar Girders - Google Patents

On-site Joint of the Prefabricated Re-bar Column to Re-bar Girders Download PDF

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Publication number
KR20120058696A
KR20120058696A KR1020100118638A KR20100118638A KR20120058696A KR 20120058696 A KR20120058696 A KR 20120058696A KR 1020100118638 A KR1020100118638 A KR 1020100118638A KR 20100118638 A KR20100118638 A KR 20100118638A KR 20120058696 A KR20120058696 A KR 20120058696A
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South Korea
Prior art keywords
reinforcing
reinforcement
column
beams
steel plate
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KR1020100118638A
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Korean (ko)
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KR101258842B1 (en
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이창남
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이창남
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/24Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
    • E04B1/2403Connection details of the elongated load-supporting parts
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/40Separate connecting elements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/58Connections for building structures in general of bar-shaped building elements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/24Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
    • E04B1/2403Connection details of the elongated load-supporting parts
    • E04B2001/2415Brackets, gussets, joining plates
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/40Separate connecting elements
    • E04B2001/405Brackets

Abstract

PURPOSE: A method for welding a reinforcement beam on a reinforcement column of a reinforcement frame assembled at a plant is provided to remarkably improve construction quality and to reduce construction time and costs compared to a normal reinforced concrete structure. CONSTITUTION: A method for welding a reinforcement beam on a reinforcement column of a reinforcement frame assembled at a plant is as follows. A reinforcement column is manufactured by welding a tie bar on a column main bar(21). A reinforcement beam is manufactured by welding a stirrup(34) on a beam main bar(31). The reinforcement beam is installed on the reinforcement column. A tie plate is installed on the slope of the column main bar where the beam main bar is welded. A part of the beam main bar where the tie plate touches the beam main bar is welded on the tie plate through couplers(26).

Description

Assembling Method of Shop-Fabricated Re-bar Girders to Columns}
Reinforced concrete frames are the most widely used structural method in the world for a long time. However, the biggest drawback of reinforced concrete structures is that the formwork and the temporary supporters have to protect their weight for about a month before the reinforcing bars and concrete are entangled with each other so that they can be operated. The factory-assembled reinforcement pillar method, which is joined to long spans of more than 8m, such as steel frame beams and TSC composite beams, has already been patented and is actively used at construction sites.However, structures within 8m of the column spacing, which are most designed with conventional reinforced concrete structures, Reinforcement frame method that manufactures beams and assembles them on site is economical. In other words, if there is no free space to store temporary materials in the building and the site where the floor support is high due to high floor height, it is more effective in the site where shortening of construction period is necessary. It is also effective in reducing the number of workers to the minimum in reinforced concrete construction sites that require the use of foreign workers. The rebar frame method is economically inferior in comparison with conventional reinforced concrete structures and construction costs.
Nevertheless, the reason why similar technology has not been commercialized so far is that the steel structure and reinforced concrete fields are completely separated from each other. This is because rebar fabrication companies are not willing to revise the specification prohibiting "rebar welding," and the steel structure industry does not attempt to use uneven steel with roughly roughened surface as a material for steel frame. Beyond this barrier is a prerequisite to be solved in the commercialization of the present invention. The reinforcing bar assembly and reinforcing bar assembly, which has been tried occasionally at home and abroad, has difficulty in assembling the reinforcing frame because it cannot be supported due to lack of precision and rigidity. However, the actual examples of the practical application of welding the reinforcement column with band bars are the automatic welding of high-strength steel wire while bending the wire spirally in centrifugal concrete piles, and the large-size reinforced concrete field pile circular section that is recently purchased in underground construction work. There is only a technique for welding large diameter reinforcing bars.
The reinforced concrete structure is a rational structure that shows the composite strength by concentrating the reinforcing bars in the tensile part of the concrete with strong compressive strength but weak tensile strength. However, during curing, the concrete is in a flow state, so it is not capable of supporting its own weight, and needs to be contained in formwork to maintain its shape, and reinforcement concrete has a problem of exerting its composite strength after the concrete is cured. In other words, depending on the formwork and temporary supports made of thin rebar and concrete in the form of flowable dough, it is necessary to wait 28 days at room temperature for 28 days at room temperature. In addition, the work cost of the formwork for forming and disassembling the temporary construction material to be removed after the construction work is over 1/3 of the cost of the reinforced concrete frame construction (compared to the formwork; 6, rebar; 3, concrete; 1). Although the technology and sincerity of the formwork is the most important factor in the quality of reinforced concrete structures, it is a problem that there is no applicant among Koreans to perform this work.
General reinforcement concrete frameworks carry reinforcing rods one by one and bundle them into a binding line (a few # 22 iron wires) to avoid reinforcing the use of coarse rebars with large unit weights. For example, a 41mm diameter rebar has a length of 10m and a weight of 105kg, so it is difficult to carry it to the construction site and install it in place. In addition, overlapping joints increase the material cost by the length of the joint (eg, 2,550 mm when the D32 concrete strength is 24 MPa). Therefore, gas welding or coupler joints are more economical for rebars over 22 mm. As a result, coarse steel is less used, and due to its scarce value, the price per unit weight of steel is more expensive than coarse steel. Therefore, in the early stages of using coarse steel, additional burdens are to be paid.
The spacing between the bars in the concrete section must be passed between the concrete aggregates, and the minimum spacing (2.5 times the bar diameter or the larger of 25mm) must be maintained to secure the attachment strength of the bars. Therefore, because of the overlap of reinforcing bars, the size of the cross section width of the members is often increased. As a means to solve this problem, some techniques of transporting and assembling PC members to construction sites are used. However, PC members can't be lifted by tower cranes due to their large unit weight, which makes it difficult to process joints between members and must be remanufactured if any part is broken during transport assembly. In addition, as a large-scale building designed to repeat the use of members of the same standard, it is economical only if the number of times that the formwork made of steel sheet in the PC factory can be recycled many times. Therefore, it is still selectively used only for specific construction such as a large apartment underground parking lot.
Although the quality of the reinforced concrete structure depends on the function and ability of the formwork and the reinforcing bar, even if it is precisely assembled, the reinforcing concrete is tied to the reinforcement with a thin ties so that workers in each field can step on the reinforcing bars or pour concrete into the process. It tends to deviate or bend this predetermined position. This, in turn, becomes the root cause of poor construction.
Portion of the flow of the concrete before curing at the construction site to the construction of reinforced concrete is 2.5t / m 3 or higher, and reinforced has a large load as well as to support its own weight even with only one reinforcement frame assembly by heavier coupling line to 7.85t / m 3 none. Therefore, formwork and temporary supports must safely support the weight of concrete and reinforcing steel as well as the working load during the pouring of concrete. In addition, when pouring concrete, the flowable concrete discharged from the concrete pump is piled up higher than the final level, so the formwork and the temporary support should be able to safely withstand the momentary load and no large deformation.
The first task is that the prefabricated reinforcement columns and reinforcement beams manufactured at the factory need detailed processing that can be easily assembled with couplers at the construction site even if the central axis and length of the main bars are not accurate. The second task is to provide a low-cost permanent steel sheet formwork that does not need to be simplified and demolded because the most difficult process in the construction method of reinforced concrete structure is formwork. Lastly, the third task is to use welding rebars for factory-assembled rebar frames, but there are still companies that can produce domestic welding rebars and the production volume is limited. shall.
Reinforced concrete structure and permanent formwork made of reinforcement pillars and reinforcement beams by welding strip reinforcement or stirrups and yarns to column reinforcement (21) of reinforcement column or reinforcement (31) of reinforcement beam in steel ball factory. Attach to and bring it to the site and assemble it with the reinforcing column. This ensures that the reinforcement column 20 and the reinforcement beams 30 are as rigid as H-shaped steels, so that they can support most of the fixed loads while independing as well as pouring concrete. Therefore, even the simple workers can assemble and dismantle the column formwork and temporary supports at the construction site, and the construction period and construction cost can be reduced and construction quality is greatly improved compared to general reinforced concrete structures.
Through the performance test (FIG. 7), it was confirmed that the reinforcement can be welded like the steel or the steel sheet. According to the test results, it was confirmed that welding was possible by heat treatment of preheating and postheating according to the carbon equivalent. However, even without preheating or postheating, there is no problem in securing strength, and elongation is lowered. Therefore, special moment frame or middle moment frame for seismic design is considered to be rebar welded by preheating or postheating the panel zone to secure ductility. . As a result of the post-weld reinforcement test for welding rebar and general reinforcing bars, there is no significant difference in strength. Therefore, it is thought that it would be effective to unify all the reinforcing bars to be produced as welding rebars and to be listed in the Korean Industrial Standard (KS) as far as possible.
Reinforcing columns and reinforcing beams require the same level of precision as ordinary steel structures. Reinforcing the hole hole size (about 5mm larger) in the upper and lower band steel plates 23 and 24 or the beam bonding steel plates 38 and 39, and the stub bars 33 inside the band steel sheet and the joining steel sheet are moved up, down, left and right from the central axis. It enables free fine movement.
By applying this method, the reinforcement frame 10 can reduce the cross-section compared to the general reinforced concrete columns and beams, and becomes a method halfway between the steel structure and the reinforced concrete structure. The cost of construction is similar to that of reinforced concrete and can be cheaper once you get used to the mass production system. The construction period is similar to steel frame.
The biggest advantage of this method is the improvement of construction quality. In the factory, the rebar is cut to the exact size, welded and assembled, so there is no fear that the rebar will leave a predetermined position during construction. In addition, it is almost unnecessary to work on the formwork on site. In other words, the efficiency of construction is improved by changing the formwork-driven reinforced concrete structure to the reinforcement-driven structure. In addition, there are many cases in which repairs are made due to cracks in reinforced concrete structures, especially beams.However, if the formwork of steel sheet is applied to the surface of the beams, neutralization is delayed and cracks are prevented. Do.
This method is a method of manufacturing by assembling the column head 21, the band reinforcing bar 22 and the pole bar 31, the stub 34, the yarn 35 in the factory as shown in Figure 1 instead of the binding line. In addition, the column and beam joints are joined on-site by using a coupler, and the sheet steel sheet formwork 40 is attached, thereby greatly improving rigidity. In the upper and lower ends of the pillar panel zone, the reinforcing bar is placed inside the column section in advance, and the joints of the main bar 31 and the bar reinforcing bar are used by turning a coupler on the screws provided at the end of the main bar and the stub bar 33. . Column reinforcing bar uses high-strength (400MPa or more) welding reinforcing bar, and the thicker the reinforcing bar at both ends or corners in the north-west, north-west direction. The remaining reinforcing bars are arranged as close to the corner as possible to increase the structural efficiency corresponding to the bending moments in the X and Y directions. Column bars, strip reinforcing bars, and upper and lower strip steel plates are manufactured at the factory.
The main pole 31 is basically arranged in the corner of the reinforcement beams two each up and down. Beam adder 32 uses coarse steel bars as much as possible for structural calculations, and the cost burden of couplers required for jointing is reduced by minimizing the number of steel bars. Reducing the number of rebars using coarse reinforcing bars reduces the cost of welding the periphery and the stubble 34 and the yarn 35 when manufacturing at the factory. In addition, as the cross-section secondary radius ( i ) of the reinforcing column (20) and the reinforcing beam (30) main rod increases, the buckling length ( L k ) of the main rod constrained by the band reinforcing bars, stirrups, and yarns increases, resulting in structural stability in the construction process. Increases. The upper band steel plate on the side where the reinforcing beam is attached to the reinforcing column is extended with the width of the lower part to attach the thin steel sheet formwork to the reinforcing column as shown in FIGS. 1 to 3 (for details, a separate patent application will be made. to be).
After manufacturing the reinforcement column and the reinforcement beam with this method, the steel sheet formwork is installed and manufactured. And when the column formwork is conventionally attached at the construction site, it is possible to secure the strength during construction required to pour the floor slab, beam and column concrete by itself. If the beam sharing width is large or the fixed load increases considerably than the general building, the strength is examined by structural calculation. If the capacity to support all the construction loads is insufficient, as shown in Figure 4 to build and strengthen the temporary column in the bottom of the beam and pre-select the installation location, number and specifications of the temporary column. Therefore, when the plant assembly reinforcement column and reinforcement beam, thin steel sheet formwork (40) is applied, the formwork is greatly reduced, and precisely placed in the required position of the rebar, it has the advantage of ensuring the construction process density and structure strength. The length of one column of reinforcing bar of factory assembly is generally within 3 floors as the steel structure (the length of reinforcing bar is within 12m, even if order production).
Reinforcement frame 10 in the state before pouring concrete cannot support all of the design loads, so the additional reinforcement beams should be reinforced at the construction site. 1 and 2, if the beam is continuous in the east-west or north-south direction of the column, the additional beam 32 is reinforced by passing through the reinforcing column 20 at the construction site and fixed with a binding line. However, when the reinforcement beam 30 is located only on one side of the reinforcing column as shown in FIGS. 2 and 3, the additional beams are assembled into couplers by inserting the reinforcing bar 33 into the strip steel plate in the same manner as the reinforcing bars of both ends. Since the orbital roots are overlapped in the column in the horizontally orthogonal direction, the band steel plate fixed to the orbital roots also becomes higher than the orthogonal band steel plate as the height of the orbital roots when the orbital roots in the column come to the top.
At the construction site, the work of assembling the reinforcing bars inserted into the reinforcing bars and pillar strip steel plates (23, 24) with the coupler (26) is the most difficult task in this method. Therefore, the reinforcing bar inside the column should be able to move finely up, down, left and right in the steel plate reinforcing hole. In addition, the steel plate stub stopper 28 as shown in FIG. 3 (e) is welded to the stub bars 33 at the factory so as not to fall out or move on the strip steel sheet in the longitudinal direction. The steel plate stopper 28 is a medium for fixing the strip steel plate to which the main column is joined by using a steel bar and a coupler. Therefore, it is possible to apply the method of temporarily fixing the parts of the coupler to which the coupler is attached by using nuts or to fix the coupler to the parts of the coupler and then to assemble the site after transportation. The method of joining a large beam and a small beam is also the same as the above method. However, it is also possible to transport the assembly consisting of the upper and lower joining steel plates 38 and 39, the steel pipe stopper, and the steel reinforcing bar into a large beam without separately attaching it to the large beam, and to assemble it on site.
Coarse steel bars must be made to order by length to reduce drop loss. When the production of rebar frames is activated and the volume increases, order production by length is possible without additional burden. The manufacturing method of the steel sheet formwork as shown in Fig. 5, the method of joining the reinforcement beam and the joint method of the reinforcing column at the construction site, etc. is separately applied for a patent.
The process of manufacturing the reinforcement frame 10 composed of reinforced concrete columns and beams is as follows.
first ; Reinforcement column 20 is fixed by welding the reinforcing bar strip to the column root, the reinforcement beam 30 is produced by fixing the stub to the main column by welding.
second ; Rebar columns and rebar beams manufactured through the first step are brought to the site and joined. The panel zone in which the reinforcing column and the reinforcing beams are joined is provided with a strip steel plate on the slope of the column head 21 at the position where the main column 31 is joined. The strip steel sheet has different strip steel plate positions in the orthogonal direction depending on the position of the beam root by the height of the beam root.
third ; The strip steel plate is installed by separating the upper strip steel plate 23 and the lower strip steel plate 24 in the upper and lower, respectively, according to the position of the upper pole and lower pole. The beam root at the region where the band steel plate meets with the beam root is welded to the band steel plate by installing a coupler 26. The rebar end where the barley and coupler meet is threaded to allow the barley to be secured to the coupler.
fourth ; One side of the coupler fixed to the strip steel plate is fixed to the periphery, the other side is fixed to the coupler through the grooves drilled in the strip steel plate 33 in the strip steel plate. Therefore, both ends of the rebar are threaded and fixed to the coupler.
Fifth ; The beam root fixed to the coupler uses high-strength thick bars at both ends of the upper and lower portions. Therefore, the slope edges of the reinforcement beams are applied with high strength thick bars. If necessary, additional beams should be installed between the thick roots at both ends.
sixth ; In addition to the reinforcement beams both ends of the reinforcement beams additional beam 32 is to be penetrated through the U-shaped groove (25) in the area where the band steel plate and the additional roots meet when the beam is continuous on the opposite side. If the beam is not continuous on the opposite side, the site where the additional beams and the band steel plates (23, 24) meet is fixed with a coupler and the end of the stub bars is fixed to the outside of the band steel plate with a nut (27).
If the beams are not continuous, the steel pipe stopper 28 is fixed to the steel plate by fixing the steel pipe stopper 28 to the upper part of the steel bar in consideration of the possibility of falling of the steel bar during transportation, and the outside of the steel plate on the opposite side where the steel beam is not continuous is fixed with a nut. Fix it. Alternatively, the nut is fixed on the outside of the steel strips on both sides of the reinforcing bar and brought in on site to disassemble one nut and secure it with a coupler. Another embodiment is fixed on one side with a nut on the opposite side of the steel strip around the reinforcing bar, and the other side is fixed using a coupler installed in the column. When the site is brought in, the coupler installed on the strip steel is dismantled, and then the coupler and the reinforcing bar are connected by using the coupler.
Through this process, the reinforcing beams are joined to the reinforcing column of the plant reinforcing bar frame.
1 is a factory assembly reinforcing bar frame joined to the beam to the four sides of the column,
Figure 2 is a factory assembly reinforcing frame joints, the beam is joined to the three sides of the column,
Figure 3 is a factory assembly reinforcing frame joints, the beam is joined to the two sides of the column, perspective and enlarged plan view
Figure 4 is an illustration of a temporary column arrangement of the plant assembly reinforcing frame,
Figure 5 is a conceptual diagram of the joining method of the steel sheet formwork and the reinforcement pillar,
6 is a perspective view of the bonding of the large beams and small beams,
7 is a test result of the strength and elongation of the reinforcing bar when rebar welding.
Description of the Related Art
10; Rebar Frame
20; Reinforcing column 21; Column
22; Strip reinforcing bars 23; Upper strip steel sheet
24; Lower band steel plate 25; U-shaped groove
26; Coupler 27; nut
28; Steel pipe stopper
30; Reinforcing beams 31; Bovine root
32; Additional root 33; Chopped rebar
34; Stirrups 35; Material
37; Stopper 38; Upper bonded steel sheet
39; Bottom Bonded Steel Sheet
40; Steel Sheet Formwork
50; Temporary holding
60; Pillar formwork

Claims (3)

  1. In the process of manufacturing the reinforcement frame 10 composed of reinforced concrete columns and beams,
    (a) reinforcing column (20) is fixed to the column reinforcing bars by welding, the reinforcement beam 30 is a step of manufacturing by fixing the stirrup to the main column by welding
    (b) When the reinforcing columns and the reinforcing beams are manufactured, the reinforcing beams are installed in the reinforcing columns, and the panel zone where the reinforcing columns and the reinforcing beams are joined is provided with a strip steel plate on the slope of the column bar 21 at the position where the reinforcing bar 31 is joined. Steps to
    (c) The strip steel plate is installed by separating the upper strip steel plate 23 and the lower strip steel plate 24 at the upper and lower beam root positions, respectively. ) To weld to strip steel plate
    (d) Installing the coupler so that the side of the bar is fixed and the other side is fixed to the coupler through the groove of the strip steel 33
    (e) The method of joining the reinforcement beam to the reinforcing column of the reinforcement frame of the factory-assembled reinforcing frame, wherein the beam is secured to the coupler by applying coarse reinforcement to both upper and lower ends.
  2. The method of claim 1,
    In addition to the reinforcement beams at both ends of the reinforcement beams, the additional beam 32 is to penetrate the additional roots with the U-shaped grooves 25 in the area where the band steel plate and the additional major beams meet;
    Or if the beam is not continuous on the other side, the assembly of the factory, characterized in that the area where the additional beams and the band steel plate (23, 24) meet the fixed coupler and the outer end of the band steel plate with the nut (27) Method of joining reinforcing bar to reinforcing column of reinforcing bar frame
  3. The method of claim 1,
    If the reinforcing column 20 is joined to the reinforcing beams 30 and the reinforcing beams are not continuous to the opposite side, both sides of the reinforcing bars are fixed with nuts from the outside of the steel strip;
    Or the steel sheet 33 inside the steel strip is fixed by welding the steel pipe stopper 28 to the steel sheet on the upper part of the steel bar, and fixing the outer side of the steel plate on the opposite side where the reinforcing beam is not continuous with a nut;
    Alternatively, the reinforcing bar on the side of the reinforcing beam is a method of joining the reinforcing bar to the reinforcement column of the plant assembly reinforcing frame, characterized in that it comprises a coupler to fix the outer side of the strip steel plate, the outer side of the strip steel plate with a nut.
KR1020100118638A 2010-11-26 2010-11-26 On-site Joint of the Prefabricated Re-bar Column to Re-bar Girders KR101258842B1 (en)

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KR101258842B1 KR101258842B1 (en) 2013-05-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109267700A (en) * 2018-10-18 2019-01-25 上海宝冶集团有限公司 A kind of assembled beam-column node area reinforcing bar arrangement

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101663132B1 (en) 2016-03-18 2016-10-07 힐 중공업 주식회사 Self-supporting type column structure
KR101992754B1 (en) 2019-03-12 2019-06-26 나인찬 Automatic welding equipment for steel structures
KR102087725B1 (en) 2019-11-21 2020-03-11 (주) 건우기계 rebar structure automatic welding equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109267700A (en) * 2018-10-18 2019-01-25 上海宝冶集团有限公司 A kind of assembled beam-column node area reinforcing bar arrangement
CN109267700B (en) * 2018-10-18 2020-08-14 上海宝冶集团有限公司 Assembled beam column node area reinforcing bar structure of arranging

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