KR101868677B1 - Connection unit for coupling main steel girder and ancillary steel girder and, connection methods using the same - Google Patents
Connection unit for coupling main steel girder and ancillary steel girder and, connection methods using the same Download PDFInfo
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- KR101868677B1 KR101868677B1 KR1020160011166A KR20160011166A KR101868677B1 KR 101868677 B1 KR101868677 B1 KR 101868677B1 KR 1020160011166 A KR1020160011166 A KR 1020160011166A KR 20160011166 A KR20160011166 A KR 20160011166A KR 101868677 B1 KR101868677 B1 KR 101868677B1
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- Prior art keywords
- web
- steel beam
- auxiliary
- bar
- auxiliary steel
- Prior art date
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Classifications
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
-
- 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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2415—Brackets, gussets, joining plates
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2418—Details of bolting
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
In the present invention, the main steel beam and the auxiliary steel beam are connected by semi-rigid joining or steel joining to reduce deflection and cracking and vibration at the time of construction and use, thereby reducing the amount of steel material used, It has an advantage that it is easy.
Description
The present invention relates to a method of connecting a main steel beam and an auxiliary steel beam. More specifically, the present invention relates to a method of connecting a main steel beam and an auxiliary steel beam by means of semi-rigid joining or steel joining to reduce deflection and cracking and vibration at the time of construction, Accordingly, it is possible to reduce the amount of steel material used and to provide a simple and easy connection method for joining. In addition, the present invention also relates to a connection unit used in such a connection method.
Generally, steel bars are made of a high-strength homogeneous material, and thus have the advantage that a frame can be constructed with a minimum amount of water. However, when a steel frame structure made of a steel frame is applied to a building, there is a disadvantage in that it can not fully utilize the high strength, which is an advantage of the material, due to weak performance of deflection, cracking and vibration of the beam.
The building structure standard specifies restrictions (minimum requirements) for deflection and vibration of the beam. If steel bars are designed to meet these limitations, there will be room for member strength. In other words, when designing to meet the restrictions on deflection and vibration, there is a problem that excessive steel is used even though there is room for member strength.
When the steel span is L, the elastic modulus of the steel steel is E, and the moment of inertia is I, the deflection and vibration of the beam are related to L / (EI). At this time, L can not fluctuate due to the architectural plan, so it is necessary to control (increase) EI (stiffness) to control deflection and vibration.
However, an increase in E (elastic modulus) is not realistic because of an enormous cost increase, and an increase in I (sectional moment of inertia) should increase the height (dancing) or width or thickness of the cross section. It is possible to construct a composite structure coated with concrete to increase the I value, but it is a problem such as deterioration of quality, increase of weight of frame, complication of construction, complexity of construction, increase of construction period, increase of construction cost.
On the other hand, as another method of controlling sag and vibration, there is a method of installing a steel beam by steel bonding or semi-bonding instead of installing a steel beam by a pin bonding. Steel joints and semi-rigid joints are advantageous for vibration and deflection. For example, in the case of steel joints, the deflection can be reduced to a level of up to 1/5 (20% of the pin joint).
However, general steel joining or semi-rigid joining details are extremely rare in applications because of poor construction. Flange field welding to weld steel-frame joints is very difficult before welding the bottom flange before the slab is completed, construction cost and construction period are increased, and steel-welded steel beams using bolts in the form of end plates or brackets are theoretically possible. However, It is almost impossible to apply it due to the extremely low workability.
Accordingly, there is a need for a joining method which is excellent in performance against vibration, cracking and sagging, has excellent workability, and can reduce the amount of steel used.
SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-described problems, and it is an object of the present invention to provide a steel frame structure in which a secondary steel beam is coupled to a main steel beam by steel bar joining or steel joining, And it is an object of the present invention to provide a simple and easy connection method that can reduce the amount of steel material used and thus reduce the deflection and cracking and vibration of the steel pipe.
In addition, another object of the present invention is to provide a connecting unit used in such a connecting method.
A connecting method according to the present invention is a method of connecting a
The connecting
The
A bolt for fastening to the
The first and
According to the present invention, when the
On the other hand, when the
The
The
In step (b), among the first and
In the step (d), the connecting
In the connecting method according to the present invention, the weight of the subsidiary steel bar 10 (10a), the load of the
As an alternative to the structure designing method, the self-weight of the
The present invention has the following effects.
First, it is possible to reduce the sagging and cracking and vibration at the time of construction, and to reduce the amount of steel material by connecting the secondary steel beam to the main steel beam by connecting with the steel bar joint or steel joint, ≪ / RTI >
Secondly, a connection unit used in the above connection method is provided.
Third, in the connection structure between the secondary steel bridge and the main steel bridge, a method of designing the bolting connection of the web, the connecting unit and the upper flat plate (and / or the tensile steel and / or the upper flange field welding) .
1 is a perspective view showing a structure in which a main steel beam and a secondary steel beam are connected according to a first embodiment of the present invention;
Fig. 2 is an exploded perspective view of Fig. 1; Fig.
FIG. 3A is a perspective view showing a connecting unit used for connecting a main steel beam and an auxiliary steel beam. FIG.
Figure 3b is a front view of Figure 3a;
Figure 3c is a bottom view of Figure 3a.
4 is a perspective view showing another connecting unit used for connecting a main steel beam and an auxiliary steel beam.
Fig. 5 is a front view of Fig. 1; Fig.
Figure 6 is a left side view of Figure 3;
Fig. 7 is a plan sectional view of Fig. 3; Fig.
8 is a view showing that the connecting unit is temporarily fastened to the auxiliary steel beam.
9 is a perspective view showing a modification of an upper flat plate for connecting the upper flange of the main steel frame with the upper flange of the auxiliary steel frame.
10 is a plan view showing a structure in which a main steel beam and an auxiliary steel beam are connected using the upper plate of FIG.
11 is a perspective view showing a modification of the connecting unit.
12 is a front view showing a structure in which a main steel beam and a secondary steel beam are connected according to a second embodiment of the present invention;
13 is a front view showing a structure in which a main steel beam and a secondary steel beam are connected according to a third embodiment of the present invention;
14 and 15 are views showing a structure in which auxiliary steel bars are coupled to only one side of the main steel bars, respectively.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely examples of the present invention and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.
FIG. 1 is a perspective view showing a structure in which a main steel beam and a secondary steel beam are connected according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view of FIG.
Referring to the drawings, the method of connecting the steel bars is performed by using the connecting
The connecting
The
The connecting
The connecting
A
The
The
The
When the auxiliary steel bars 10 and 10a are respectively coupled to both sides of the
Meanwhile, FIG. 8 shows that the connection unit 100 (100a) is temporarily fastened to the auxiliary steel bar 10 (10a). The bolts are fastened through the
The
The
Fig. 10 shows a modification of the
11 shows a modified example of the
12 is a front view showing a structure in which a main steel beam and a secondary steel beam are connected according to a second embodiment of the present invention.
As shown in the figure, the connection structure is the same as the connection structure of the first embodiment except that a
The
13 is a front view showing a structure in which a main steel beam and a secondary steel beam are connected according to a third embodiment of the present invention. The connection structure is the same as that of the first and second embodiments except that the
FIG. 14 shows a structure in which the
The
15 shows a structure in which a
How to design the connection structure
A method of designing a connection structure according to the present invention will now be described. As described above, since the connection structure is achieved by using the '
The design method proposed by the present invention is as follows. Assume that the bolting connection of the web, the connection unit, and the 'upper plate and / or tensile steel and / or upper flange field welding' are different joining conditions for each load- The design process can be simplified and the working time can be shortened compared with the conventional design method.
(1) Method A
The bolting connection of the
(2) Method B
The connection of the connection unit 100 (100a) and the upper plate (200) 'or the' web 'of the web (13) in the load of the slab concrete (310) The bolting connection of the connecting
The above methods A and B are all constructed using the connecting
Construction method of connection structure
Hereinafter, a method of connecting the
First, a
Subsequently, as shown in FIG. 8, the connecting unit 100 (100a) is installed in the auxiliary steel bar 10 (10a). In the
Next, after the
When the lifting is completed, the
When the gobot is completed, the
Subsequently, the
Next, an upper
In the connecting structure according to the present invention, a compressive force acts on the
As described above, since the connecting structure according to the present invention has a semi-rigid joint or a strong joint, when the slab concrete is laid, the deflection of the center of the beam is reduced to 1/5 of that of the pin joint, Vibration is reduced when the building is used because it is connected by steel joint or steel joint. Therefore, the amount of steel material used can be reduced.
Although only the connection method of the first embodiment has been described above, those skilled in the art will be able to easily understand the connection methods of the second and third embodiments and the connection methods of FIGS.
10, 10a:
13, 33:
12, 16, 32, 34, 201: bolt holes 19, 39: stud bolt
30: main steel frame 37: connecting flat plate
100, 100a: connection unit 110: top plate
112: first bolt hole 120: bottom plate
122: second bolt hole 130: spacer plate
140: end plate 142: third bolt hole
148: chin plate 150: support member
200: upper plate 300: tensile bar
310: Slab Concrete C: Concrete
Claims (11)
(a) installing a main steel beam (30) with a connecting flat plate (37) coupled to the web (33);
(b) installing the connecting unit 100 (100a) on the lower flange 15 of the auxiliary steel bar 10 (10a);
(c) bolting the web 13 of the auxiliary steel bar 10 (10a) and the connecting flat plate 37 with bolts;
(d) fitting the end plates 140 of the connecting units 100 and 100a to the web 33 of the main steel bar 30 and then tightening the bolts; And
(e) An upper flat plate 200 covering the upper flange 11 of the auxiliary steel beam 10 (10a) and the upper flange 31 of the main steel beam 30 is installed and the bolts are fastened to the upper flanges 11 A tensile reinforcing bar 300 passing over the main steel bar 30 and the auxiliary steel bars 10 and 10a in the longitudinal direction of the auxiliary steel bars may be provided or the upper flanges 11 and 31 may be installed on the site And welding at least two of the upper plate 200, the tensile bar 300, and the weld,
The bolting connection of the web 13 or the 'bolting connection of the web 13 and the connecting unit 100' 100a 'in the loading step of the slab concrete 310 and the load of the auxiliary steel shaft 10 (10a) The upper plate 200 and the tensile bars 300 or the upper flanges 11 and 31 are welded in situ by welding in a simple supporting condition (pin connection) Is characterized in that the structure design is performed assuming that the field welding of the upper flange 11 or 31 and the tensile bar 300 behave according to a rigid or semi rigid connection. How to connect main steel bridge and secondary steel bridge.
(a) installing a main steel beam (30) with a connecting flat plate (37) coupled to the web (33);
(b) A connecting unit 100 (100a) is installed on the lower flange 15 of the auxiliary steel beam 10, and an auxiliary steel beam 10a (10a) to be installed on the opposite side of the auxiliary steel beam 10 around the main steel beam 30 (100a) to the lower flange (15) of the connecting member (100);
(c) bolting the web 13 of the auxiliary steel bar 10 (10a) and the connecting flat plate 37 with bolts;
(d) bringing the end plates 140 of the connecting units 100, 100a into close contact with each other on opposite sides of the web 33 of the main steel bar 30, and then fastening the bolts to each other; And
(e) An upper flat plate 200 covering the upper flange 11 of the auxiliary steel beam 10 (10a) and the upper flange 31 of the main steel beam 30 is installed and the bolts are fastened to the upper flanges 11 A tensile steel bar 300 passing over the main steel bar 30 and the auxiliary steel bars 10 and 10a in the longitudinal direction of the auxiliary steel bars 10 and 10a may be installed or the upper flanges 11 (31) at the site by welding, or constructing at least two of the upper plate (200), the tensile bar (300) and the weld,
The bolting connection of the web 13 or the 'bolting connection of the web 13 and the connecting unit 100' 100a 'in the loading step of the slab concrete 310 and the load of the auxiliary steel shaft 10 (10a) The upper plate 200 and the tensile bars 300 or the upper flanges 11 and 31 are welded in situ by welding in a simple supporting condition (pin connection) Is characterized in that the structure design is performed assuming that the field welding of the upper flange 11 or 31 and the tensile bar 300 behave according to a rigid or semi rigid connection. How to connect main steel bridge and secondary steel bridge.
(a) installing a main steel beam (30) with a connecting flat plate (37) coupled to the web (33);
(b) installing the connecting unit 100 (100a) on the lower flange 15 of the auxiliary steel bar 10 (10a);
(c) bolting the web 13 of the auxiliary steel bar 10 (10a) and the connecting flat plate 37 with bolts;
(d) fitting the end plates 140 of the connecting units 100 and 100a to the web 33 of the main steel bar 30 and then tightening the bolts; And
(e) An upper flat plate 200 covering the upper flange 11 of the auxiliary steel beam 10 (10a) and the upper flange 31 of the main steel beam 30 is installed and the bolts are fastened to the upper flanges 11 A tensile reinforcing bar 300 passing over the main steel bar 30 and the auxiliary steel bars 10 and 10a in the longitudinal direction of the auxiliary steel bars may be provided or the upper flanges 11 and 31 may be installed on the site And welding at least two of the upper plate 200, the tensile bar 300, and the weld,
The connection of the connection unit 100 (100a) and the upper plate (200) 'or the' web 'of the web (13) in the load of the slab concrete (310) The bolting connection of the connecting bolts 13 and the field welding of the connecting units 100a and the upper flanges 11 and 31 behave as a rigid connection and the tensile reinforcing bars 300 ) Is designed to be rigid or semi- rigid connection, and the structural design is carried out.
(a) installing a main steel beam (30) with a connecting flat plate (37) coupled to the web (33);
(b) A connecting unit 100 (100a) is installed on the lower flange 15 of the auxiliary steel beam 10, and an auxiliary steel beam 10a (10a) to be installed on the opposite side of the auxiliary steel beam 10 around the main steel beam 30 (100a) to the lower flange (15) of the connecting member (100);
(c) bolting the web 13 of the auxiliary steel bar 10 (10a) and the connecting flat plate 37 with bolts;
(d) bringing the end plates 140 of the connecting units 100, 100a into close contact with each other on opposite sides of the web 33 of the main steel bar 30, and then fastening the bolts to each other; And
(e) An upper flat plate 200 covering the upper flange 11 of the auxiliary steel beam 10 (10a) and the upper flange 31 of the main steel beam 30 is installed and the bolts are fastened to the upper flanges 11 A tensile steel bar 300 passing over the main steel bar 30 and the auxiliary steel bars 10 and 10a in the longitudinal direction of the auxiliary steel bars 10 and 10a may be installed or the upper flanges 11 (31) at the site by welding, or constructing at least two of the upper plate (200), the tensile bar (300) and the weld,
The connection of the connection unit 100 (100a) and the upper plate (200) 'or the' web 'of the web (13) in the load of the slab concrete (310) The bolting connection of the connecting bolts 13 and the field welding of the connecting units 100a and the upper flanges 11 and 31 behave as a rigid connection and the tensile reinforcing bars 300 ) Is designed to be rigid or semi- rigid connection, and the structural design is carried out.
The stud bolts 19 are installed on the upper flanges 11 and 31 so that the tensile steel bars 300 and the slab concrete 310 and the auxiliary steel bars 10 are installed in the upper flanges 11 and 31, (10a) and the main steel bar (30) move integrally.
The bolt hole 201 of the upper flat plate 200 is a long hole formed in the longitudinal direction of the upper flat plate 200 or the bolt hole 12 of the upper flange 11 is a long hole formed long in the longitudinal direction of the auxiliary steel bracket,
Wherein a slip of the bolt is generated before the upper flat plate (200) is broken.
Priority Applications (1)
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KR1020160011166A KR101868677B1 (en) | 2016-01-29 | 2016-01-29 | Connection unit for coupling main steel girder and ancillary steel girder and, connection methods using the same |
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KR1020160011166A KR101868677B1 (en) | 2016-01-29 | 2016-01-29 | Connection unit for coupling main steel girder and ancillary steel girder and, connection methods using the same |
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Cited By (1)
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KR20200000157U (en) | 2018-07-11 | 2020-01-21 | 이규순 | section steel connecting apparatus for iron frames of a structure |
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